Objective:To investigate the stress perceptions of nurses serving in home healthcare services during COVID-19.Methods:This study was qualitative research with a phenomenological design.Data were collected and recorded...Objective:To investigate the stress perceptions of nurses serving in home healthcare services during COVID-19.Methods:This study was qualitative research with a phenomenological design.Data were collected and recorded through in-depth interviews with 6 nurses working in MuşState Hospital,Home Healthcare Services Unit using a form consisting of 12 questions on an online platform between May 2021 and July 2021.The audio recordings were transcribed by the researcher and content analysis was performed by creating codes,categories,and themes.Results:The interviews yielded 10 categories and 59 sub-codes.These codes were addressed under the theme of"COVID-19 pandemic".Under this main theme,nurses expressed the problems they experienced in issues such as stress,support mechanisms,and family and social problems during COVID-19.They mentioned that they experienced high stress in this process,as well as social isolation and negative thoughts of society about them and that they could not spare time for themselves and their families.Conclusions:Nurses working in home healthcare services frequently express negativities such as high stress,isolation from society,and increased workload.Therefore,actions should be taken to raise awareness of society on these issues,increase the number of personnel,conduct more research,and share the results with the public.展开更多
Objective:The study aimed to determine the faculty of the health sciences students’knowledge and attitudes regarding the coronavirus disease 2019(COVID-19)pandemic.Materials and Methods:This cross-sectional survey wa...Objective:The study aimed to determine the faculty of the health sciences students’knowledge and attitudes regarding the coronavirus disease 2019(COVID-19)pandemic.Materials and Methods:This cross-sectional survey was completed with 317 undergraduate students of one health sciences faculty in Turkey.The data were collected between March 1,2020,and March 15,2020,by face-to-face interviews using a questionnaire created by the researchers.Number,percentage,mean,standard deviation,and Pearson Chi-square test were used to evaluate the data.Results:In this study,a high proportion of students answered questions about COVID-19 correctly.About 55.8%of the students took partial precautions against COVID-19 to protect themselves against COVID-19 and“frequent washing of hands”was the most common precaution.We determined that the main reasons for not taking any precautions against COVID-19 were“low number of cases in Turkey”and“getting irritated by the mask.”About 98.4%of the participants were entirely/partially following the news on COVID-19,with social media being the most commonly used medium.Female students took more protective measures than male students.The 1st-year students had more positive thoughts about vaccination compared to those in the other classes.Conclusions:Although the knowledge of the students about COVID-19 was good in the first wave of the pandemic,more than half of the students stated that they partially complied with the protective measures.展开更多
Background:Disasters have effects that leave great negative marks on our lives,even after many years have passed.Individuals who experience an earthquake experience physical and psychological difficulties.The purpose ...Background:Disasters have effects that leave great negative marks on our lives,even after many years have passed.Individuals who experience an earthquake experience physical and psychological difficulties.The purpose of this study is to determine how psychological resilience levels affect the feeling of hopelessness and post-traumatic growth in adults who experienced the 06 February,2023 Turkey-Syria earthquake.Methods:Data were collected using the“Personal Information Form(PIF)”,“Turkish forms of Adult Resilience Measure(ARM)”,“Dispositional Hope Scale(DHS)”and“Post-Traumatic Growth Inventory(PTGI)”.In order to determine whether there is a significant difference in the effect of psychological resilience of earthquake victims participating in the study on hope and post-traumatic growth levels in terms of socio-demographic variables,after determining that the data was normally distributed,total score average,minimum and maximum values,standard deviation(SD),independent sample t-test,ANOVA,correlation analysis to determine the relationship between the scales and multiple regression analysis to determine the effect between the scales were performed.Results:Of the 202 earthquake victims who participated in the study,65.8%were between the ages of 18–34,67.3%were female,92.1%were not trapped under the rubble,and 34.2%had second-degree relatives trapped under the rubble.It was determined that 77.8%of them lost their relatives in the earthquake and 77.8%of them lost a serious amount of property and money due to the earthquake.As a result of the analysis,it was determined that psychological resilience had a statistically significant and positive effect on hopelessness and post-traumatic growth in individuals who experienced the 06 February earthquake.In this regard,it has been determined that as the psychological resilience of individuals increases,their hope levels and post-traumatic growth will also increase.Conclusion:Based on the research results,increasing hope and increasing psychological resilience in psychosocial support studies carried out by mental health professionals for traumatic events will contribute to the spiritual recovery of individuals.展开更多
Dexmedetomidine is a selective α2-adrenoceptor agonist that is used because of its sedative,anxiolytic,and analgesic effects.Dexketoprofen,which is used as an analgesic,is a nonselective nonsteroidal anti-inflammator...Dexmedetomidine is a selective α2-adrenoceptor agonist that is used because of its sedative,anxiolytic,and analgesic effects.Dexketoprofen,which is used as an analgesic,is a nonselective nonsteroidal anti-inflammatory drug (NSAID).The use of dexmedetomidine and dexketoprofen as adjuvants to local anesthetics for the peripheral nerve is gradually increasing.In this study,we aimed to investigate the effects of different doses of dexmedetomidine and dexketoprofen on conduction block of rat sciatic nerve.The isolated sciatic nerve from adult rats was transferred to a nerve chamber.The compound action potentials (CAPs) were recorded from stimulated nerve with electrophysiological methods.Dexmedetomidine (n = 8) and dexketoprofen (n = 8) were administered in the chamber with cumulative concentrations of 10–9 to 10–5 M,and the CAPs were recorded for 5 and 10 minutes.The CAP parameters were calculated.Both dexmedetomidine and dexketoprofen significantly depressed all CAP parameters in a dose-dependent manner compared with the control group,i.e.,the group in which rats did not receive treatment.CAP parameters showed there was no significant difference in nerve conduction inhibition between dexmedetomidine and dexketoprofen.Higher doses of dexmedetomidine suppressed the conduction in the fast-conducting fibers;however,dexketoprofen was found to suppress the conduction in the slow-conducting fibers in a time-dependent manner and suppress the conduction in the medium- and slow-conducting fibers in a dose-dependent manner.These findings suggest that dexmedetomidine and dexketoprofen exhibit better anesthetic effects on peripheral nerve through different ways of action.The experimental procedures were approved by the Necmettin Erbakan University on January 30,2013 (approval No.2013-024).展开更多
Objective:This descriptive study reveals how nurses working in public hospitals rated their practice environments with respect to nurse-friendly hospital criteria.Methods:This study was conducted on 460 nurses volunte...Objective:This descriptive study reveals how nurses working in public hospitals rated their practice environments with respect to nurse-friendly hospital criteria.Methods:This study was conducted on 460 nurses volunteering to participate this study among 735 nurses working in inpatient wards of three public hospitals.Data were collected using a personal information form and the Adapted Nursing Work IndexeRevised.Numbers,percentages,means and standard deviations,t-test and one-way variance analysis were used to evaluate the data.Results:Among the nurse-friendly hospital criteria,‘control of nursing practice’,‘middle management accountability’and‘quality initiatives’had the highest mean scores,and‘competitive wages’had the lowest mean score.The assessments of the nurses presented statistically significant differences with respect to personal and occupational variables.Conclusion:The nurses found most of the nurse-friendly hospital criteria adequate,but they believed that several areas needed improvement.展开更多
AIM:To identify the virulence genotypes of Helicobacter pylori(H.pylori)if present in children in Eastern Turkey and if those genotypes are mostly associated with severe clinical presentations.METHODS:A total of 49 H....AIM:To identify the virulence genotypes of Helicobacter pylori(H.pylori)if present in children in Eastern Turkey and if those genotypes are mostly associated with severe clinical presentations.METHODS:A total of 49 H.pylori positive Turkish children(42 with antral nodularity and 7 with peptic ulcer)who underwent upper gastrointestinal endoscopy with abdominal symptoms during the period from March 2011 to September 2012 were enrolled in this study.Antral nodularity was diagnosed endoscopically by two of the authors.We determined for the presence of cagA,vacA,cagE,iceA and babA2 genotypes of H.pylori isolates in DNA obtained directly from frozen gastric biopsy samples by polymerase chain reaction test using specific primers.RESULTS:Of the 49 H.pylori isolates studied,61.2%,91.8%,22.4%,28.6%,57.1%and 40.8%were positive for the cagA,vacA s1,cagE,iceA1,iceA2 and babA2 genes,respectively.We showed that the most common vacA subtype was s1a(79.6%).However,the s2 gene was found less frequently with an isolation rate of 8.2%of the H.pylori isolates.The genotypes iceA2 and vacA s1m2 were the most frequently found types in children with antral nodularity.In addition,the genotypes iceA1,babA2 and vacA s1m1 were found in similar ratios in all the H.pylori isolates obtained from children with peptic ulcer.The genotypes vacA s2m1and s1c were not observed in any of isolates studied.CONCLUSION:This study showed that vacA s1m2,cagA and iceA2 were the most common genotypes,and no association between antral nodularity and genotypes was observed.展开更多
The hardness,wettability,and electrochemical properties of Ti6Al4V alloy surfaces treated with anodic oxidation and plasma oxidation as well as the viabilities of the different cell lines on the obtained surfaces were...The hardness,wettability,and electrochemical properties of Ti6Al4V alloy surfaces treated with anodic oxidation and plasma oxidation as well as the viabilities of the different cell lines on the obtained surfaces were investigated.The anodic oxidation was performed for 10 min under 100 V potential,and it resulted in a 0.95μm thick nanoporous anatase-TiO2 structure.On the other hand,plasma oxidation was carried out at 650℃ for 1 h and resulted in a dense rutile-TiO2 structure with a thickness of 1.2μm.While a hardness of HV0.025823 and roughness of^220 nm were obtained by plasma oxidation,those obtained by anodic oxidation were HV0.025512 and^130 nm,respectively.The anodic oxidation process created a more hydrophilic surface with a contact angle of 87.2°.Both oxidation processes produced similar properties in terms of corrosion behavior and showed better resistance than the as-received state in a certain range of potential.Moreover,the surface treatments led to no significant change in the protein adsorption levels,which indicates that the difference in viability between the osteoblast and fibroblast cells was not due to the difference in surface protein adsorption.Given all the factors,the surfaces obtained by anodic oxidation treatment revealed higher cell viability than those obtained by plasma oxidation(p=0.05).展开更多
In the present study,we investigate several textile coating pastes used in the market based on their radiation protection capability for gamma rays.The gamma ray mass absorption coefficients of some coating pastes dop...In the present study,we investigate several textile coating pastes used in the market based on their radiation protection capability for gamma rays.The gamma ray mass absorption coefficients of some coating pastes doped with antimony,boron and silver elements have been investigated.It has been determined that the gamma ray mass attenuation coefficient decreases rapidly as the energy of the gamma rays increases.It was determined that the doping of the main printing paste with silver and antimony considerably increased the gamma ray absorption capability of main paste.However,the doping of the paste with boron reduces the mass absorption of gamma rays.In particular,the gamma ray mass absorption power of the main paste doped with silver and antimony was determined to be useful in the gamma energy range from 80 to 140keV.This indicates that the newly doped textile material may be considered for radiation protection in the case of low-energy gamma rays.展开更多
Elastography is a method which determines the stiffness of tissues with the help of ultrasound technology and exhibits more quantitative data according to palpation that made during physical examination. Elastography ...Elastography is a method which determines the stiffness of tissues with the help of ultrasound technology and exhibits more quantitative data according to palpation that made during physical examination. Elastography has relatively entered to routine use in the breast evaluation with imaging techniques. Although palpation has a very long history, elastography has been used since 1990s. Elastography is used as an adjunct to conventional gray scale ultrasound and can identify the stiffness of the tissues non-invasively. Today, it is used as two separate technological modalities: strain elastography and shear wave elastography. The aims of these modalities are to increase the sensitivity of the separation between malignant and benign lesions, reduce the unnecessary biopsy processes and to provide a more accurate Breast Imaging Reporting and Data System (BIRADS) categorization of the breast lesions. In this article, we aimed to review the clinical utilization and benefits of elastography in differantial diagnosis of breast lesions, BIRADS categorization, and biopsy decision making in the light of current literature.展开更多
Purpose: To investigate potential pathological differences in major brain metabolites in burning mouth syndrome (BMS). Materials and Methods: We prospectively evaluated eight patients and six healthy controls with sin...Purpose: To investigate potential pathological differences in major brain metabolites in burning mouth syndrome (BMS). Materials and Methods: We prospectively evaluated eight patients and six healthy controls with single voxel magnetic resonance (MR) spectroscopy throughout 2017 using 3-Tesla MR unit. Metabolite levels measured from the left posterior paracingulate white matter. Raw images were processed with Tarquin version 4.3.10 and area under curve values were automatically calculated for GABA (γ-Aminobutyric acid), Ins (myo-inositole), tNAA (N-Acetylaspartate), tCho (total choline), tCr (total creatine) and GLx (glutamine + Glutamat). Major metabolite levels and all metabolites ratio to tCr calculated and compared between two groups using Mann-Whitney U test. Results: GABA/tCR value of the patients (0.589 ± 0.194, median = 0.515) was significantly higher than control group (0.230 ± 0.067, median = 0.220) (P = 0.002). tNAA/tCR value of the patients (1.106 ± 0.218, median: 1.205), was significantly lower than the control group (1.538 ± 0.401, median: 1.705) (P = 0.028). No significant difference was observed between two groups in terms of all other metabolites (P > 0.05). Conclusion: We demonstrated increased GABA and decreased NAA in the left posterior paracingulate region in BMS patients. We suggest that these metabolite alterations in central nervous system might play a key role in the etiology of the disease by inhibiting the suppression of burning sensation.展开更多
In this paper,mass attenuation coefficients of concrete,bricks and cement plaster,as shielding materials,are calculated at 59.5,356,662,1173,1274 and 1333 keV by using the MCNP-X(version 2.4.0) code.The numerical simu...In this paper,mass attenuation coefficients of concrete,bricks and cement plaster,as shielding materials,are calculated at 59.5,356,662,1173,1274 and 1333 keV by using the MCNP-X(version 2.4.0) code.The numerical simulation results are compared with previous Monte Carlo studies,experimental results and XCOM data.The effects of barite on mass attenuation coefficients are investigated.The mass attenuation coefficients increase with the barite content.Thus,our results agree well with experimental studies on gamma ray shielding of barite.It is flexible for the MN method to change the barite rates in material by small increments,which is experimentally difficult.Also,modeled geometry can be used for future approaches such as new designs and new structures especially in investigating new barite-containing materials to build nuclear reactors or high-energy radiation therapy facilities.展开更多
Objective:To investigate the cognitive state,psychological problems such as depression and anxiety,and pain in the musculoskeletal system among young adults with post-COVID-19(long COVID)syndrome.Methods:This descript...Objective:To investigate the cognitive state,psychological problems such as depression and anxiety,and pain in the musculoskeletal system among young adults with post-COVID-19(long COVID)syndrome.Methods:This descriptive study included 361 students studying at the Vocational School of Health Services of Bingöl University in Turkey.Data were collected using the Socio-Demographic Information form,the Beck’s Depression Inventory,the Cognitive Appraisal Scale,and the Visual Analogue Scale for pain.Results:Compared to those without COVID-19,the mean depression score,cognitive appraisal score,and mean Visual Analogue Scale score of the young adults with COVID-19 were significantly higher.There was no significant difference in pain assessment at rest between those with COVID-19 and those without COVID-19.Conclusions:Young adults with COVID-19 are more depressed,their cognitive functions are more easily negatively affected,and experience more pain during exercise.展开更多
Rosa canina is a member of the genus Rosa that has long been used for medical objectives. Several studies have reported cytotoxic effects of different Rosa species, but there has been only limited investigation of the...Rosa canina is a member of the genus Rosa that has long been used for medical objectives. Several studies have reported cytotoxic effects of different Rosa species, but there has been only limited investigation of the cytotoxic effect of R. canina. The purpose of the current study was to examine the potential effect of R.canina extract on cell viability, the cell cycle, apoptosis, and the expression of telomerase in human colon cancer(WiDr) cells. The cytotoxic effect of the extract was determined using MTT assay. The mechanism involved in the cytotoxic effect of the extract was then evaluated in terms of apoptosis and the cell cycle using flow cytometry. Mitochondrial membrane potential(MMP) was investigated using the fluorometric method, and expression levels of telomerase were studied using RT-PCR. R. canina extract exhibited a selective cytotoxic effect on WiDr cells compared with normal colon cells. The extract induced cell cycle arrest at the S phase and apoptosis via reduced MMP in WiDr cells. R. canina extract significantly repressed telomerase expressions at treatment times of 48 and 72 h in WiDr cells. Our results suggest that R. canina may have considerable potential for development as a novel natural product-based anticancer agent.展开更多
Background:Low levels of antioxidant paraoxonase 1(PON 1)enzyme activity,PON1-Q192R polymorphism(a glutamine(Q)to arginine(R)substitution at position 192),PON1-L55M polymorphism(a leucine(L)to methionine(M)substitutio...Background:Low levels of antioxidant paraoxonase 1(PON 1)enzyme activity,PON1-Q192R polymorphism(a glutamine(Q)to arginine(R)substitution at position 192),PON1-L55M polymorphism(a leucine(L)to methionine(M)substitution at position 55),and oxidized low-density lipoprotein(oxLDL)are risk factors for coronary heart disease.Aerobic exercise improves PON1 activity,but the effects of hypoxic exercise are yet unclear.The aim of this study was to determine the effects of hypoxic underwater rugby training on PON1 activity and oxLDL levels and the role of the mentioned polymorphisms.Methods:Serum PON1 and arylesterase activities(ARE),PON1,PON3,and oxLDL protein levels(by using the enzyme-linked immunosorbent assays)were determined in an athletic group(42 trained male underwater rugby players;age=21.7±4.2 years,mean±SD)and a control group(43 sedentary men;age=23.9±3.2 years).The polymorphisms were determined from genomic DNA samples.Results:PON1 activity(25.1%,p=0.052),PON3(p<0.001),and oxLDL(p<0.001)of the athletic group,including most genotype groups,were higher than those of the control group.In comparison to the controls,PON1 activity levels(p=0.005)of the PON1-Q192R homozygote QQ genotype group and PON1 activity levels(30%,p=0.116)of the PON1-L55M homozygote LL genotype group were higher,whereas ARE activity values of athletic R allele carrier(Rc=QR+RR)(p=0.005)and LL group(p=0.002)were lower than the control genotype groups related to their polymorphisms.Conclusion:Hypoxic training can cause(1)significant oxidative stress,including oxLDL,and an antioxidant response(increase in PON1 activity and PON3),(2)differences in the activity of PON1 and ARE,which are modified by PON1-Q192R and PON1-L55M polymorphisms,respectively,and(3)improvements in PON1 activity of QQ and LL groups.However,hypoxic training can cause a disadvantage of LL and Rc groups for ARE.展开更多
The blood supply to the most of abdominal organs is provided by the branches of CT. The SMA supply caecum, ascends colon, all of the small bowels except the upper part of duodenum. Knowledge of variable anatomy of cel...The blood supply to the most of abdominal organs is provided by the branches of CT. The SMA supply caecum, ascends colon, all of the small bowels except the upper part of duodenum. Knowledge of variable anatomy of celiac axis and SMA may be useful in planning and executing radiological interventions such as celiacography and chemoembolization of hepatic and pancreatic tumors. In this study, the uncommon or low percentage cases of CT and SMA are presented in the light of clinical and embryological information. The celiac axises of a total of 30 adult corpses were examined. Dissections of abdominal region were performed in detail according to Cunningham’s manual. Angiographic images of 100 consecutive adult patients who underwent celiac MDCT angiography were evaluated. During autopsies, an incomplete celiac trunk or bifurcation of celiac trunk associated with the hepatomesenteric and gastrosplenic trunks (0.7%) and a celiacomesenteric trunk associated with high origin superior mesenteric artery and gastrosplenic trunk were detected (0.7%). During MDCT angiography, a case of total absence of celiac trunk associated with a hepatosplenomesenteric trunk (0.7%) and also a case of total absence of celiac trunk alone were observed (0.7%). The persistence or unusual development of ventral splanchnic arteries (VSAs) or ventral longitudinal anastomosis may result in variations or the unusual trunks related to celiac axis and SMA. The anomalous trunks of the CT may be result of either the persistence of some parts of the VSAs or ventral longitudinal anastomose that normally disappear or disappearance of parts that normally persist. The prevalence of unusual trunks of celiac axis and SMA in this study is quite low in literature. These abnormal vessels pose problems for surgeons and radiologists. Such vascular anomalies may cause clinical complications following surgical and radiological procedures such as resection of tumor of the pancreatic head, lymphadenectomy, coeliacography, aortic replacement with reimplantation of the trunk and coembolization of pancreatic and liver tumors.展开更多
X-ray computed tomography (CT) related to computer-processed combination or X-ray images obtained from different angles to create patient's cross-sectional body parts images. CT ensures to have imaging various orga...X-ray computed tomography (CT) related to computer-processed combination or X-ray images obtained from different angles to create patient's cross-sectional body parts images. CT ensures to have imaging various organs, bones, blood vessel etc. and more advantageous than normal plain X-ray devices in consequence of 360 degree image of internal organs, the spine and vertebrae. For decades, Radiation protection became a main topic in research areas since CT uses various dose of X-ray for imaging body. Distance factor is the one of fundamental principle of radiation protection. Maximum dose occurs around gantry and dose rate is decreases by distance in CT facilities. To know the rate of reduction of the amount of dose by distance is very significant for radiation protection procedure especially for apply criteria of International Commission on Radiological Protection (ICRP) on radiation protection. Our study aimed to measure scattered dose rates during abdominal CT scan by considering small distance ranges from gantry until exit door and comparing the empirical result with Monte Carlo (MC) calculations. As a next step of study, we modeled a simulation input for CT facility by using MCNP-X (version 2.4.0). We obtained the changes of dose rate on distance factor by using Monte Carlo method, We achieved that MCNP-X calculations were in concordance with clinical experimental measurements. It can be concluded that Monte Carlo (MC) is an effective tool for obtain dose rate variations around CT gantry and especially radiation protection calculations in CT facilities.展开更多
Objective:This study aimed to determine the physical activity level of university students,to compare them according to gender and to investigate the effect of physical activity level on sleep and quality of life.Mate...Objective:This study aimed to determine the physical activity level of university students,to compare them according to gender and to investigate the effect of physical activity level on sleep and quality of life.Materials and Methods:The research is of an analytical-cross-sectional type.In total,288(181 F,107 M)university students with a mean age of 19.59±2.00 years participated in the study.Height,weight and waist circumference measurements were taken.Participants were asked a questionnaire to determine their socio-demographic characteristics and exercise,the Pittsburgh Sleep Quality Index(PSQI)for assessing sleep quality,Godin Leisure Time Exercise Questionnaire to measure 1-week total physical activity level and SF-36(Brief)to assess the quality of life.Quality of Life Questionnaires were applied by face-to-face questionnaire method.Results:39% of the students were active,18% were moderately active,and 43% were not active enough.When the data of girls and boys were compared,only the height,body weight,waist circumference,Body Mass Index(BMI)and Godin Leisure Time Exercise Questionnaire,SF 36 had a significant difference in emotional role difficulty results in favor of men(p<0.00).Social functioning and general health perception(r=0.116;r=0.119)of the SF-36 quality of life questionnaire were found to be positively correlated with the energy/vitality component of Godin leisure time questionnaire and SF-36 quality of life questionnaire(r=0.121).There was a low positive correlation between sleep quality and all components of the SF-36 quality of life questionnaire(0.168<r<0.333).Conclusion:As a result,only 39% of university students are active and spend more time on computers and phones.Boys had a physically more active lifestyle than girls.In the young population,physical activity did not affect sleep quality,but sleep quality affected quality of life.For health and quality life,the participation of individuals in regular exercise should be encouraged,physical activity programs should be organized and motivated in universities.展开更多
In today’s world,Pleurotus ostreatus(Jacq.)P.Kumm.and Agaricus bisporus(J.E.Lance)Imbach species which are grown both wild and cultured are very popular for humans diet because these species have been used in traditi...In today’s world,Pleurotus ostreatus(Jacq.)P.Kumm.and Agaricus bisporus(J.E.Lance)Imbach species which are grown both wild and cultured are very popular for humans diet because these species have been used in traditional medicine,economicaly and pharmacology.Two species of edible mushrooms Pleurotus ostreatus and Agaricus bisporus were selected from natural and cultured ones to determine vitamins and mineral contents levels.In this study,total protein levels,vitamin A-E and C levels and some mineral levels such as Fe,Cu,Zn,K,Na and Ni were investigated in both natural and cultured species.展开更多
Au/Zn O/n-type Si device is obtained using atomic layer deposition(ALD) for Zn O layer, and some main electrical parameters are investigated, such as surface/interface state(Nss), barrier height(Φb), series res...Au/Zn O/n-type Si device is obtained using atomic layer deposition(ALD) for Zn O layer, and some main electrical parameters are investigated, such as surface/interface state(Nss), barrier height(Φb), series resistance(Rs), donor concentration(Nd), and dielectric characterization depending on frequency or voltage. These parameters are acquired by use of impedance spectroscopy measurements at frequencies ranging from 10 k Hz to 1 MHz and the direct current(DC) bias voltages in a range from-2 V to +2 V at room temperature are used. The main electrical parameters and dielectric parameters,such as dielectric constant(ε"), dielectric loss(ε"), loss tangent(tan δ), the real and imaginary parts of electric modulus(M and M), and alternating current(AC) electrical conductivity(σ) are affected by changing voltage and frequency. The characterizations show that some main electrical parameters usually decrease with increasing frequency because charge carriers at surface states have not enough time to fallow an external AC signal at high frequencies, and all dielectric parameters strongly depend on the voltage and frequency especially in the depletion and accumulation regions. Consequently, it can be concluded that interfacial polarization and interface charges can easily follow AC signal at low frequencies.展开更多
Purpose: To define the level of quality of life in an elderly population and to investigate the effects of selected variables, such as anemia, fatigue, depression and sleep disorders, on the quality of life. Design an...Purpose: To define the level of quality of life in an elderly population and to investigate the effects of selected variables, such as anemia, fatigue, depression and sleep disorders, on the quality of life. Design and Methods: The study was conducted in Gazio?lu Nursing Home, located in the city center of Kayseri, on 136 subjects ≥65 in the year 2008-2009. Data were collected using the Geriatric Depression Scale (GDS), Fatigue Severity Scale (FSS), Pittsburgh Sleep Quality Index (PSQI) and the World Health Organization Quality of Life-OLD (WHOQOL- OLD) Module. In the statistical analysis mean ± standard deviation, student’s t-test, ANOVA and Spearman correlation analysis were used. Re- sults: The mean total score of quality of life was 43.45 ± 10.30. Of the residents 47.0% had a poor quality of life. Autonomy had the lowest (35.70 ± 19.96) and intimacy had the highest (48.75 ± 17.96) subdomain scores. Fatigue significantly decreased the total and autonomy, social par- ticipation and death and dying subdomain scores. Anemia had a significant adverse effect on intimacy, depression on autonomy and intimacy and sleep disorder on death and dying. There were negative correlations between fatigue with past-present-future activities and social participation, depression with social participation, intimacy, death and dying and glucose levels with social participation and intimacy. Implications: About half of the subjects had a poor quality of life. Fatigue was the sole factor to negatively affect the total score in WHOQOL-OLD. Depression, anemia and sleep disorder adversely affected the autonomy, social participation, intimacy, death and dying subdomain scores but not in all.展开更多
文摘Objective:To investigate the stress perceptions of nurses serving in home healthcare services during COVID-19.Methods:This study was qualitative research with a phenomenological design.Data were collected and recorded through in-depth interviews with 6 nurses working in MuşState Hospital,Home Healthcare Services Unit using a form consisting of 12 questions on an online platform between May 2021 and July 2021.The audio recordings were transcribed by the researcher and content analysis was performed by creating codes,categories,and themes.Results:The interviews yielded 10 categories and 59 sub-codes.These codes were addressed under the theme of"COVID-19 pandemic".Under this main theme,nurses expressed the problems they experienced in issues such as stress,support mechanisms,and family and social problems during COVID-19.They mentioned that they experienced high stress in this process,as well as social isolation and negative thoughts of society about them and that they could not spare time for themselves and their families.Conclusions:Nurses working in home healthcare services frequently express negativities such as high stress,isolation from society,and increased workload.Therefore,actions should be taken to raise awareness of society on these issues,increase the number of personnel,conduct more research,and share the results with the public.
文摘Objective:The study aimed to determine the faculty of the health sciences students’knowledge and attitudes regarding the coronavirus disease 2019(COVID-19)pandemic.Materials and Methods:This cross-sectional survey was completed with 317 undergraduate students of one health sciences faculty in Turkey.The data were collected between March 1,2020,and March 15,2020,by face-to-face interviews using a questionnaire created by the researchers.Number,percentage,mean,standard deviation,and Pearson Chi-square test were used to evaluate the data.Results:In this study,a high proportion of students answered questions about COVID-19 correctly.About 55.8%of the students took partial precautions against COVID-19 to protect themselves against COVID-19 and“frequent washing of hands”was the most common precaution.We determined that the main reasons for not taking any precautions against COVID-19 were“low number of cases in Turkey”and“getting irritated by the mask.”About 98.4%of the participants were entirely/partially following the news on COVID-19,with social media being the most commonly used medium.Female students took more protective measures than male students.The 1st-year students had more positive thoughts about vaccination compared to those in the other classes.Conclusions:Although the knowledge of the students about COVID-19 was good in the first wave of the pandemic,more than half of the students stated that they partially complied with the protective measures.
文摘Background:Disasters have effects that leave great negative marks on our lives,even after many years have passed.Individuals who experience an earthquake experience physical and psychological difficulties.The purpose of this study is to determine how psychological resilience levels affect the feeling of hopelessness and post-traumatic growth in adults who experienced the 06 February,2023 Turkey-Syria earthquake.Methods:Data were collected using the“Personal Information Form(PIF)”,“Turkish forms of Adult Resilience Measure(ARM)”,“Dispositional Hope Scale(DHS)”and“Post-Traumatic Growth Inventory(PTGI)”.In order to determine whether there is a significant difference in the effect of psychological resilience of earthquake victims participating in the study on hope and post-traumatic growth levels in terms of socio-demographic variables,after determining that the data was normally distributed,total score average,minimum and maximum values,standard deviation(SD),independent sample t-test,ANOVA,correlation analysis to determine the relationship between the scales and multiple regression analysis to determine the effect between the scales were performed.Results:Of the 202 earthquake victims who participated in the study,65.8%were between the ages of 18–34,67.3%were female,92.1%were not trapped under the rubble,and 34.2%had second-degree relatives trapped under the rubble.It was determined that 77.8%of them lost their relatives in the earthquake and 77.8%of them lost a serious amount of property and money due to the earthquake.As a result of the analysis,it was determined that psychological resilience had a statistically significant and positive effect on hopelessness and post-traumatic growth in individuals who experienced the 06 February earthquake.In this regard,it has been determined that as the psychological resilience of individuals increases,their hope levels and post-traumatic growth will also increase.Conclusion:Based on the research results,increasing hope and increasing psychological resilience in psychosocial support studies carried out by mental health professionals for traumatic events will contribute to the spiritual recovery of individuals.
基金Scientific Committee Foundation(No.13102007) of Selcuk University,Konya,Turkey(to HB)
文摘Dexmedetomidine is a selective α2-adrenoceptor agonist that is used because of its sedative,anxiolytic,and analgesic effects.Dexketoprofen,which is used as an analgesic,is a nonselective nonsteroidal anti-inflammatory drug (NSAID).The use of dexmedetomidine and dexketoprofen as adjuvants to local anesthetics for the peripheral nerve is gradually increasing.In this study,we aimed to investigate the effects of different doses of dexmedetomidine and dexketoprofen on conduction block of rat sciatic nerve.The isolated sciatic nerve from adult rats was transferred to a nerve chamber.The compound action potentials (CAPs) were recorded from stimulated nerve with electrophysiological methods.Dexmedetomidine (n = 8) and dexketoprofen (n = 8) were administered in the chamber with cumulative concentrations of 10–9 to 10–5 M,and the CAPs were recorded for 5 and 10 minutes.The CAP parameters were calculated.Both dexmedetomidine and dexketoprofen significantly depressed all CAP parameters in a dose-dependent manner compared with the control group,i.e.,the group in which rats did not receive treatment.CAP parameters showed there was no significant difference in nerve conduction inhibition between dexmedetomidine and dexketoprofen.Higher doses of dexmedetomidine suppressed the conduction in the fast-conducting fibers;however,dexketoprofen was found to suppress the conduction in the slow-conducting fibers in a time-dependent manner and suppress the conduction in the medium- and slow-conducting fibers in a dose-dependent manner.These findings suggest that dexmedetomidine and dexketoprofen exhibit better anesthetic effects on peripheral nerve through different ways of action.The experimental procedures were approved by the Necmettin Erbakan University on January 30,2013 (approval No.2013-024).
文摘Objective:This descriptive study reveals how nurses working in public hospitals rated their practice environments with respect to nurse-friendly hospital criteria.Methods:This study was conducted on 460 nurses volunteering to participate this study among 735 nurses working in inpatient wards of three public hospitals.Data were collected using a personal information form and the Adapted Nursing Work IndexeRevised.Numbers,percentages,means and standard deviations,t-test and one-way variance analysis were used to evaluate the data.Results:Among the nurse-friendly hospital criteria,‘control of nursing practice’,‘middle management accountability’and‘quality initiatives’had the highest mean scores,and‘competitive wages’had the lowest mean score.The assessments of the nurses presented statistically significant differences with respect to personal and occupational variables.Conclusion:The nurses found most of the nurse-friendly hospital criteria adequate,but they believed that several areas needed improvement.
文摘AIM:To identify the virulence genotypes of Helicobacter pylori(H.pylori)if present in children in Eastern Turkey and if those genotypes are mostly associated with severe clinical presentations.METHODS:A total of 49 H.pylori positive Turkish children(42 with antral nodularity and 7 with peptic ulcer)who underwent upper gastrointestinal endoscopy with abdominal symptoms during the period from March 2011 to September 2012 were enrolled in this study.Antral nodularity was diagnosed endoscopically by two of the authors.We determined for the presence of cagA,vacA,cagE,iceA and babA2 genotypes of H.pylori isolates in DNA obtained directly from frozen gastric biopsy samples by polymerase chain reaction test using specific primers.RESULTS:Of the 49 H.pylori isolates studied,61.2%,91.8%,22.4%,28.6%,57.1%and 40.8%were positive for the cagA,vacA s1,cagE,iceA1,iceA2 and babA2 genes,respectively.We showed that the most common vacA subtype was s1a(79.6%).However,the s2 gene was found less frequently with an isolation rate of 8.2%of the H.pylori isolates.The genotypes iceA2 and vacA s1m2 were the most frequently found types in children with antral nodularity.In addition,the genotypes iceA1,babA2 and vacA s1m1 were found in similar ratios in all the H.pylori isolates obtained from children with peptic ulcer.The genotypes vacA s2m1and s1c were not observed in any of isolates studied.CONCLUSION:This study showed that vacA s1m2,cagA and iceA2 were the most common genotypes,and no association between antral nodularity and genotypes was observed.
基金This work was financially supported by Erzincan Binali Yıldırım University Research Fund(No.FBA-2018-547).
文摘The hardness,wettability,and electrochemical properties of Ti6Al4V alloy surfaces treated with anodic oxidation and plasma oxidation as well as the viabilities of the different cell lines on the obtained surfaces were investigated.The anodic oxidation was performed for 10 min under 100 V potential,and it resulted in a 0.95μm thick nanoporous anatase-TiO2 structure.On the other hand,plasma oxidation was carried out at 650℃ for 1 h and resulted in a dense rutile-TiO2 structure with a thickness of 1.2μm.While a hardness of HV0.025823 and roughness of^220 nm were obtained by plasma oxidation,those obtained by anodic oxidation were HV0.025512 and^130 nm,respectively.The anodic oxidation process created a more hydrophilic surface with a contact angle of 87.2°.Both oxidation processes produced similar properties in terms of corrosion behavior and showed better resistance than the as-received state in a certain range of potential.Moreover,the surface treatments led to no significant change in the protein adsorption levels,which indicates that the difference in viability between the osteoblast and fibroblast cells was not due to the difference in surface protein adsorption.Given all the factors,the surfaces obtained by anodic oxidation treatment revealed higher cell viability than those obtained by plasma oxidation(p=0.05).
基金supported by the Sinop University Scientific Research Projects Coordinator(No.GMYO-1901-16-14)。
文摘In the present study,we investigate several textile coating pastes used in the market based on their radiation protection capability for gamma rays.The gamma ray mass absorption coefficients of some coating pastes doped with antimony,boron and silver elements have been investigated.It has been determined that the gamma ray mass attenuation coefficient decreases rapidly as the energy of the gamma rays increases.It was determined that the doping of the main printing paste with silver and antimony considerably increased the gamma ray absorption capability of main paste.However,the doping of the paste with boron reduces the mass absorption of gamma rays.In particular,the gamma ray mass absorption power of the main paste doped with silver and antimony was determined to be useful in the gamma energy range from 80 to 140keV.This indicates that the newly doped textile material may be considered for radiation protection in the case of low-energy gamma rays.
文摘Elastography is a method which determines the stiffness of tissues with the help of ultrasound technology and exhibits more quantitative data according to palpation that made during physical examination. Elastography has relatively entered to routine use in the breast evaluation with imaging techniques. Although palpation has a very long history, elastography has been used since 1990s. Elastography is used as an adjunct to conventional gray scale ultrasound and can identify the stiffness of the tissues non-invasively. Today, it is used as two separate technological modalities: strain elastography and shear wave elastography. The aims of these modalities are to increase the sensitivity of the separation between malignant and benign lesions, reduce the unnecessary biopsy processes and to provide a more accurate Breast Imaging Reporting and Data System (BIRADS) categorization of the breast lesions. In this article, we aimed to review the clinical utilization and benefits of elastography in differantial diagnosis of breast lesions, BIRADS categorization, and biopsy decision making in the light of current literature.
文摘Purpose: To investigate potential pathological differences in major brain metabolites in burning mouth syndrome (BMS). Materials and Methods: We prospectively evaluated eight patients and six healthy controls with single voxel magnetic resonance (MR) spectroscopy throughout 2017 using 3-Tesla MR unit. Metabolite levels measured from the left posterior paracingulate white matter. Raw images were processed with Tarquin version 4.3.10 and area under curve values were automatically calculated for GABA (γ-Aminobutyric acid), Ins (myo-inositole), tNAA (N-Acetylaspartate), tCho (total choline), tCr (total creatine) and GLx (glutamine + Glutamat). Major metabolite levels and all metabolites ratio to tCr calculated and compared between two groups using Mann-Whitney U test. Results: GABA/tCR value of the patients (0.589 ± 0.194, median = 0.515) was significantly higher than control group (0.230 ± 0.067, median = 0.220) (P = 0.002). tNAA/tCR value of the patients (1.106 ± 0.218, median: 1.205), was significantly lower than the control group (1.538 ± 0.401, median: 1.705) (P = 0.028). No significant difference was observed between two groups in terms of all other metabolites (P > 0.05). Conclusion: We demonstrated increased GABA and decreased NAA in the left posterior paracingulate region in BMS patients. We suggest that these metabolite alterations in central nervous system might play a key role in the etiology of the disease by inhibiting the suppression of burning sensation.
文摘In this paper,mass attenuation coefficients of concrete,bricks and cement plaster,as shielding materials,are calculated at 59.5,356,662,1173,1274 and 1333 keV by using the MCNP-X(version 2.4.0) code.The numerical simulation results are compared with previous Monte Carlo studies,experimental results and XCOM data.The effects of barite on mass attenuation coefficients are investigated.The mass attenuation coefficients increase with the barite content.Thus,our results agree well with experimental studies on gamma ray shielding of barite.It is flexible for the MN method to change the barite rates in material by small increments,which is experimentally difficult.Also,modeled geometry can be used for future approaches such as new designs and new structures especially in investigating new barite-containing materials to build nuclear reactors or high-energy radiation therapy facilities.
文摘Objective:To investigate the cognitive state,psychological problems such as depression and anxiety,and pain in the musculoskeletal system among young adults with post-COVID-19(long COVID)syndrome.Methods:This descriptive study included 361 students studying at the Vocational School of Health Services of Bingöl University in Turkey.Data were collected using the Socio-Demographic Information form,the Beck’s Depression Inventory,the Cognitive Appraisal Scale,and the Visual Analogue Scale for pain.Results:Compared to those without COVID-19,the mean depression score,cognitive appraisal score,and mean Visual Analogue Scale score of the young adults with COVID-19 were significantly higher.There was no significant difference in pain assessment at rest between those with COVID-19 and those without COVID-19.Conclusions:Young adults with COVID-19 are more depressed,their cognitive functions are more easily negatively affected,and experience more pain during exercise.
基金the Foundation of Scientific Research of Gumushane University for financially supporting this research under Project No: 13.F5119.02.1
文摘Rosa canina is a member of the genus Rosa that has long been used for medical objectives. Several studies have reported cytotoxic effects of different Rosa species, but there has been only limited investigation of the cytotoxic effect of R. canina. The purpose of the current study was to examine the potential effect of R.canina extract on cell viability, the cell cycle, apoptosis, and the expression of telomerase in human colon cancer(WiDr) cells. The cytotoxic effect of the extract was determined using MTT assay. The mechanism involved in the cytotoxic effect of the extract was then evaluated in terms of apoptosis and the cell cycle using flow cytometry. Mitochondrial membrane potential(MMP) was investigated using the fluorometric method, and expression levels of telomerase were studied using RT-PCR. R. canina extract exhibited a selective cytotoxic effect on WiDr cells compared with normal colon cells. The extract induced cell cycle arrest at the S phase and apoptosis via reduced MMP in WiDr cells. R. canina extract significantly repressed telomerase expressions at treatment times of 48 and 72 h in WiDr cells. Our results suggest that R. canina may have considerable potential for development as a novel natural product-based anticancer agent.
基金Science and Technology Centre unit of Ege University for its financial support(No.33.102.2014.0001)。
文摘Background:Low levels of antioxidant paraoxonase 1(PON 1)enzyme activity,PON1-Q192R polymorphism(a glutamine(Q)to arginine(R)substitution at position 192),PON1-L55M polymorphism(a leucine(L)to methionine(M)substitution at position 55),and oxidized low-density lipoprotein(oxLDL)are risk factors for coronary heart disease.Aerobic exercise improves PON1 activity,but the effects of hypoxic exercise are yet unclear.The aim of this study was to determine the effects of hypoxic underwater rugby training on PON1 activity and oxLDL levels and the role of the mentioned polymorphisms.Methods:Serum PON1 and arylesterase activities(ARE),PON1,PON3,and oxLDL protein levels(by using the enzyme-linked immunosorbent assays)were determined in an athletic group(42 trained male underwater rugby players;age=21.7±4.2 years,mean±SD)and a control group(43 sedentary men;age=23.9±3.2 years).The polymorphisms were determined from genomic DNA samples.Results:PON1 activity(25.1%,p=0.052),PON3(p<0.001),and oxLDL(p<0.001)of the athletic group,including most genotype groups,were higher than those of the control group.In comparison to the controls,PON1 activity levels(p=0.005)of the PON1-Q192R homozygote QQ genotype group and PON1 activity levels(30%,p=0.116)of the PON1-L55M homozygote LL genotype group were higher,whereas ARE activity values of athletic R allele carrier(Rc=QR+RR)(p=0.005)and LL group(p=0.002)were lower than the control genotype groups related to their polymorphisms.Conclusion:Hypoxic training can cause(1)significant oxidative stress,including oxLDL,and an antioxidant response(increase in PON1 activity and PON3),(2)differences in the activity of PON1 and ARE,which are modified by PON1-Q192R and PON1-L55M polymorphisms,respectively,and(3)improvements in PON1 activity of QQ and LL groups.However,hypoxic training can cause a disadvantage of LL and Rc groups for ARE.
文摘The blood supply to the most of abdominal organs is provided by the branches of CT. The SMA supply caecum, ascends colon, all of the small bowels except the upper part of duodenum. Knowledge of variable anatomy of celiac axis and SMA may be useful in planning and executing radiological interventions such as celiacography and chemoembolization of hepatic and pancreatic tumors. In this study, the uncommon or low percentage cases of CT and SMA are presented in the light of clinical and embryological information. The celiac axises of a total of 30 adult corpses were examined. Dissections of abdominal region were performed in detail according to Cunningham’s manual. Angiographic images of 100 consecutive adult patients who underwent celiac MDCT angiography were evaluated. During autopsies, an incomplete celiac trunk or bifurcation of celiac trunk associated with the hepatomesenteric and gastrosplenic trunks (0.7%) and a celiacomesenteric trunk associated with high origin superior mesenteric artery and gastrosplenic trunk were detected (0.7%). During MDCT angiography, a case of total absence of celiac trunk associated with a hepatosplenomesenteric trunk (0.7%) and also a case of total absence of celiac trunk alone were observed (0.7%). The persistence or unusual development of ventral splanchnic arteries (VSAs) or ventral longitudinal anastomosis may result in variations or the unusual trunks related to celiac axis and SMA. The anomalous trunks of the CT may be result of either the persistence of some parts of the VSAs or ventral longitudinal anastomose that normally disappear or disappearance of parts that normally persist. The prevalence of unusual trunks of celiac axis and SMA in this study is quite low in literature. These abnormal vessels pose problems for surgeons and radiologists. Such vascular anomalies may cause clinical complications following surgical and radiological procedures such as resection of tumor of the pancreatic head, lymphadenectomy, coeliacography, aortic replacement with reimplantation of the trunk and coembolization of pancreatic and liver tumors.
文摘X-ray computed tomography (CT) related to computer-processed combination or X-ray images obtained from different angles to create patient's cross-sectional body parts images. CT ensures to have imaging various organs, bones, blood vessel etc. and more advantageous than normal plain X-ray devices in consequence of 360 degree image of internal organs, the spine and vertebrae. For decades, Radiation protection became a main topic in research areas since CT uses various dose of X-ray for imaging body. Distance factor is the one of fundamental principle of radiation protection. Maximum dose occurs around gantry and dose rate is decreases by distance in CT facilities. To know the rate of reduction of the amount of dose by distance is very significant for radiation protection procedure especially for apply criteria of International Commission on Radiological Protection (ICRP) on radiation protection. Our study aimed to measure scattered dose rates during abdominal CT scan by considering small distance ranges from gantry until exit door and comparing the empirical result with Monte Carlo (MC) calculations. As a next step of study, we modeled a simulation input for CT facility by using MCNP-X (version 2.4.0). We obtained the changes of dose rate on distance factor by using Monte Carlo method, We achieved that MCNP-X calculations were in concordance with clinical experimental measurements. It can be concluded that Monte Carlo (MC) is an effective tool for obtain dose rate variations around CT gantry and especially radiation protection calculations in CT facilities.
文摘Objective:This study aimed to determine the physical activity level of university students,to compare them according to gender and to investigate the effect of physical activity level on sleep and quality of life.Materials and Methods:The research is of an analytical-cross-sectional type.In total,288(181 F,107 M)university students with a mean age of 19.59±2.00 years participated in the study.Height,weight and waist circumference measurements were taken.Participants were asked a questionnaire to determine their socio-demographic characteristics and exercise,the Pittsburgh Sleep Quality Index(PSQI)for assessing sleep quality,Godin Leisure Time Exercise Questionnaire to measure 1-week total physical activity level and SF-36(Brief)to assess the quality of life.Quality of Life Questionnaires were applied by face-to-face questionnaire method.Results:39% of the students were active,18% were moderately active,and 43% were not active enough.When the data of girls and boys were compared,only the height,body weight,waist circumference,Body Mass Index(BMI)and Godin Leisure Time Exercise Questionnaire,SF 36 had a significant difference in emotional role difficulty results in favor of men(p<0.00).Social functioning and general health perception(r=0.116;r=0.119)of the SF-36 quality of life questionnaire were found to be positively correlated with the energy/vitality component of Godin leisure time questionnaire and SF-36 quality of life questionnaire(r=0.121).There was a low positive correlation between sleep quality and all components of the SF-36 quality of life questionnaire(0.168<r<0.333).Conclusion:As a result,only 39% of university students are active and spend more time on computers and phones.Boys had a physically more active lifestyle than girls.In the young population,physical activity did not affect sleep quality,but sleep quality affected quality of life.For health and quality life,the participation of individuals in regular exercise should be encouraged,physical activity programs should be organized and motivated in universities.
文摘In today’s world,Pleurotus ostreatus(Jacq.)P.Kumm.and Agaricus bisporus(J.E.Lance)Imbach species which are grown both wild and cultured are very popular for humans diet because these species have been used in traditional medicine,economicaly and pharmacology.Two species of edible mushrooms Pleurotus ostreatus and Agaricus bisporus were selected from natural and cultured ones to determine vitamins and mineral contents levels.In this study,total protein levels,vitamin A-E and C levels and some mineral levels such as Fe,Cu,Zn,K,Na and Ni were investigated in both natural and cultured species.
文摘Au/Zn O/n-type Si device is obtained using atomic layer deposition(ALD) for Zn O layer, and some main electrical parameters are investigated, such as surface/interface state(Nss), barrier height(Φb), series resistance(Rs), donor concentration(Nd), and dielectric characterization depending on frequency or voltage. These parameters are acquired by use of impedance spectroscopy measurements at frequencies ranging from 10 k Hz to 1 MHz and the direct current(DC) bias voltages in a range from-2 V to +2 V at room temperature are used. The main electrical parameters and dielectric parameters,such as dielectric constant(ε"), dielectric loss(ε"), loss tangent(tan δ), the real and imaginary parts of electric modulus(M and M), and alternating current(AC) electrical conductivity(σ) are affected by changing voltage and frequency. The characterizations show that some main electrical parameters usually decrease with increasing frequency because charge carriers at surface states have not enough time to fallow an external AC signal at high frequencies, and all dielectric parameters strongly depend on the voltage and frequency especially in the depletion and accumulation regions. Consequently, it can be concluded that interfacial polarization and interface charges can easily follow AC signal at low frequencies.
文摘Purpose: To define the level of quality of life in an elderly population and to investigate the effects of selected variables, such as anemia, fatigue, depression and sleep disorders, on the quality of life. Design and Methods: The study was conducted in Gazio?lu Nursing Home, located in the city center of Kayseri, on 136 subjects ≥65 in the year 2008-2009. Data were collected using the Geriatric Depression Scale (GDS), Fatigue Severity Scale (FSS), Pittsburgh Sleep Quality Index (PSQI) and the World Health Organization Quality of Life-OLD (WHOQOL- OLD) Module. In the statistical analysis mean ± standard deviation, student’s t-test, ANOVA and Spearman correlation analysis were used. Re- sults: The mean total score of quality of life was 43.45 ± 10.30. Of the residents 47.0% had a poor quality of life. Autonomy had the lowest (35.70 ± 19.96) and intimacy had the highest (48.75 ± 17.96) subdomain scores. Fatigue significantly decreased the total and autonomy, social par- ticipation and death and dying subdomain scores. Anemia had a significant adverse effect on intimacy, depression on autonomy and intimacy and sleep disorder on death and dying. There were negative correlations between fatigue with past-present-future activities and social participation, depression with social participation, intimacy, death and dying and glucose levels with social participation and intimacy. Implications: About half of the subjects had a poor quality of life. Fatigue was the sole factor to negatively affect the total score in WHOQOL-OLD. Depression, anemia and sleep disorder adversely affected the autonomy, social participation, intimacy, death and dying subdomain scores but not in all.