Current entrepreneurship education and practices in colleges and universities of China against the background of new countryside construction were analyzed,and compared with foreign practices.SWOT analysis was adopted...Current entrepreneurship education and practices in colleges and universities of China against the background of new countryside construction were analyzed,and compared with foreign practices.SWOT analysis was adopted to further elaborate current entrepreneurship education and practices in agricultural and forestry colleges and universities of China.Driven by education courses and practices,a sound course and practice system was established by considering characteristics and specialties of agricultural and forestry colleges and universities,which was significant for undergraduates from agricultural and forestry colleges and universities who want to start their own business,and also for the construction of new socialist countryside.展开更多
The synchronous development of industrialization,urbanization,agricultural modernization and informatization is the basic trend and future requirements of China's economic and social development. By using the rele...The synchronous development of industrialization,urbanization,agricultural modernization and informatization is the basic trend and future requirements of China's economic and social development. By using the relevant data of 1978- 2011,and establishing the VAR model,we find that in the short term,industrialization is the Granger cause of urbanization; urbanization is the Granger cause of industrialization,informatization,and agricultural modernization; agricultural modernization is the Granger cause of industrialization,informatization and urbanization; informatization is the Granger reason of industrialization,urbanization and agricultural modernization. In the long run,there are long-term and stable relations among them,and at the same time,their changes affect the structure of each other,and there are pulling effect among them.展开更多
Background:Adolescent anxiety has a significant impact on physical and mental health,and overparenting is recognized as one of the major factors affecting adolescent anxiety.The objective of this study was to investig...Background:Adolescent anxiety has a significant impact on physical and mental health,and overparenting is recognized as one of the major factors affecting adolescent anxiety.The objective of this study was to investigate the relationship between overparenting and adolescent anxiety,while also examining the mediating role of cognitive avoidance.Methods:Data were collected through a cross-sectional survey with 1931 valid responses using the Overparenting Scale,the Cognitive Avoidance Scale,and the Anxiety Self-Rating Scale.A structural equation modelling approach was used to test the mediating role of cognitive avoidance between overparenting and adolescent anxiety and to reveal the underlying mechanisms.The significance of the mediating effect was assessed based on maximum likelihood estimation.Differences in the mediating role of cognitive avoidance in the male and female samples were comparatively analyzed in the mediation effect analysis.Results:The study’s findings reveal a significant positive correlation between overparenting and adolescent anxiety(p<0.01),between overparenting and cognitive avoidance(p<0.01),and between cognitive avoidance and adolescent anxiety(p<0.01).Cognitive avoidance mediated the relationship between overparenting and adolescent anxiety.Overparenting can not only directly predict adolescent anxiety but also indirectly predict it through the mediating role of cognitive avoidance.Conclusion:This study validates the direct effect of overparenting on adolescent anxiety and reveals the mechanism of cognitive avoidance as a mediator.展开更多
BACKGROUND In myelodysplastic syndrome(MDS),oxidative stress is closely related to iron overload and DNA damage.A recent study suggested the possibility that increased oxidative stress causes not only iron overload bu...BACKGROUND In myelodysplastic syndrome(MDS),oxidative stress is closely related to iron overload and DNA damage.A recent study suggested the possibility that increased oxidative stress causes not only iron overload but also disease progression of MDS with DNA damage.We present a case of MDS with decreased reactive oxygen species(ROS)production in peripheral white blood cells(WBCs)and decreased diacron-reactive oxygen metabolites(d-ROMs)in serum after azacitidine therapy.CASE SUMMARY A 74-year-old man presented to the hematological department with the chief complaint of anemia.His vital signs were within normal limits at admission with a heart rate of 80 bpm and blood pressure of 135/60 mmHg.Laboratory tests indicated pancytopenia,a WBC count of 2190 cells/μL,a hemoglobin level of 6.2 g/dL and a platelet count of 7.4×104/μL.The patient was diagnosed with MDS with fibrosis after a bone marrow examination.This case showed decreased ROS production in WBCs,d-ROMs in serum and Wilms’tumor 1 after azacitidine therapy,after which his hematopoiesis recovered.CONCLUSION Azacitidine therapy can improve hematopoiesis and decrease ROS and d-ROM production.展开更多
Based on the characteristics of urban-rural dual economic structure in China,we build a dynamic endogenous urban-rural dual economic model closely linked to China's reality,and carry out mathematical economics ana...Based on the characteristics of urban-rural dual economic structure in China,we build a dynamic endogenous urban-rural dual economic model closely linked to China's reality,and carry out mathematical economics analysis of optimized conditions for urban and rural sectors. The main results show that:(i) The labor growth rate of urban-rural sectors must be greater than the time discount rate,or else there would be a vicious cycle of diminishing returns in the sectors;(ii) The accumulation rate of physical capital and human capital of urban-rural sectors,and the rate of technological progress,need to be greater than the corresponding depreciation rate plus the time discount rate,otherwise there would be a vicious cycle of diminishing returns in the sectors;(iii) The low accumulation rate in the rural sector,and the occurrence of labor outflow,human capital loss and lack of investment,will expand income gap between urban and rural areas,which is a reason for solidification of urban-rural dual economic structure.展开更多
The aim of the study was to investigate the effect of different surface treatment of titanium(Ti)on the adhesion test results for dental application.Ti substrates roughened by 400 to 1500-grit SiC polish papers and al...The aim of the study was to investigate the effect of different surface treatment of titanium(Ti)on the adhesion test results for dental application.Ti substrates roughened by 400 to 1500-grit SiC polish papers and alumina blasting,alkali treated by 5 molar(M)NaOH and KOH solutions and heat treated at the temperature range of 400-800℃were used in this study.The treated samples were subjected to the adhesion test.According to the results of the adhesion test,the adhesive strength showed the highest value for the blasted titanium among all polished and blasted samples.The Ti samples heated at 650℃showed the highest adhesive strength among all heat-treated samples.Further,the adhesion test results indicated the higher adhesive strength of chemically treated samples treated by NaOH rather than that by KOH.The polished and heated Ti samples showed the highest adhesive strength among all samples.展开更多
AIM:To compare central corneal thickness(CCT) and anterior chamber depth(ACD) measurements using rotating Scheimpflug imaging and partial coherence interferometry.·METHODS:As part of the first phase of Shahroud E...AIM:To compare central corneal thickness(CCT) and anterior chamber depth(ACD) measurements using rotating Scheimpflug imaging and partial coherence interferometry.·METHODS:As part of the first phase of Shahroud Eye Cohort Study with 5 190 subjects of 40 to 64 years of age,CCT and ACD were measured using Scheimpflug imaging with the Pentacam(Oculus,Inc.,Lynnwood,WA,USA) and partial coherence interferometry with the Allegro BioGraph(Wavelight,Erlangen,Germany).·RESULTS:After applying exclusion criteria,we had data of 4 387 subjects with a mean age of 50.7±6.2 years.Mean CCT with Pentacam and BioGraph were 528.6 ±33.2μm and 525.6 ±32μm respectively;the difference was statistically significant(P 【0.001),but the correlation was high(R=0.920).Mean ACD measurements using Pentacam and BioGraph were 2.68 ±0.35mm and 2.62 ±0.33mm respectively;the inter-device difference was significant(P 【0.001) with high correlation(R=0.944).The 95% limits of agreements between devices were-22.65μm to28.61μm and-0.16mm to 0.29mm for CCT and ACD measurements,respectively.·CONCLUSION:For both CCT and ACD,the BioGraph gave significantly lower values than the Pentacam(P 【0.05).Despite the high inter-device correlation,the 95%limits of agreements were wide,and this may limit their interchangeability in measuring the CCT and ACD.展开更多
AIM: To describe the frequency of H pylori infection among 1000 southern Iranian dyspeptic patients. METHODS: A prospective study was performed in a referral hospital in south of Iran from 1999 to 2005. One thousand d...AIM: To describe the frequency of H pylori infection among 1000 southern Iranian dyspeptic patients. METHODS: A prospective study was performed in a referral hospital in south of Iran from 1999 to 2005. One thousand dyspeptic patients (518 males, mean ± SD age of 49.12 ± 12.82 years) consecutively underwent upper gastrointestinal endoscopy. Multiple gastric antral biopsy samples were taken from all patients for rapid urease test and histopathologic examination (96.9% satisfactory samples). Patients were considered H pylori-infected if one or both tests were positive. RESULTS: Six hundred and seventy-one patients (67.1%, 95% confidence interval [CI]: 64.2%-70.0%) were H pylori-infected. H pylori positivity was significantly more frequent in patients with peptic ulcer disease (PUD) than in those with non-ulcer dyspepsia (P < 0.001). Male-to-female ratio for duodenal and gastric ulcers was 2.7:1 and 1.5:1, respectively. Moreover, the duodenal- to-gastric ulcer ratio was 1.95:1. The frequency of H pylori infection among those with endoscopic diagnosis of gastritis, duodenal ulcer, gastric ulcer, and normal mucosa was 70.1% (398/568), 86.2% (150/174), 71.9% (64/89), and 33.5% (54/161), respectively. H pylori infection, male sex, and older age were independently associated with PUD in multivariate analysis. H pylori positivity was associated with chronic gastritis, and chronic active gastritis with odds ratios of 34.21 (95% CI: 12.19%-96.03%) and 81.21 (95% CI: 28.85%-228.55%), respectively. CONCLUSION: H pylori and PUD are highly frequent in dyspeptic patients from south of Iran. H pylori is a cardinal risk factor for chronic active or inactive gastritis.展开更多
Relationship between Chinese rural non-agricultural employment and farmland use circulation has always been a hot research topic without final conclusions.This paper uses survey data of"China Health and Retiremen...Relationship between Chinese rural non-agricultural employment and farmland use circulation has always been a hot research topic without final conclusions.This paper uses survey data of"China Health and Retirement Longitudinal Study(CHARLS)"covering 1,549 households of 95 villages in Zhejiang and Gansu Province in 2008.According to the data analysis,Zhejiang Province has a higher ratio of rural households leasing out their farmland than Gansu Province has,while the latter has a higher ratio of rural residents going out for earning a living.In both provinces,non-agricultural employment and farmland use circulation show significant positive correlation,but in Gansu,non-agricultural employment of farmers shows no significant positive correlation with rural households leasing out their farmland.The factor shows that for peasants in underdeveloped regions of west China,they rely more on land because of its social security functions,so they are not willing to lease out their land even when they go to cities for earning a living.For local government,it is not appropriate to promote farmland use circulation by depending on the transfer of rural labor forces,fundamental needs of peasants must be taken into consideration.展开更多
This paper conducts an empirical analysis of influence of fiscal expenditure supporting agriculture monetary supply on rural residents' s consumption by adopting a vector auto-regression model,based on the data fr...This paper conducts an empirical analysis of influence of fiscal expenditure supporting agriculture monetary supply on rural residents' s consumption by adopting a vector auto-regression model,based on the data from 1978 to 2011.The study indicated that:in the short term,fiscal policy is the Granger reason of rural residents' consumption,monetary policy is not the Granger reason of rural residents' consumption;in the long term,the comprehensive function of fiscal policy and monetary policy has a great influence on the of rural residents' consumption.Under the background of Economic Transition and Urbanization,Expanding Domestic Demand is the slogan.We should coordinate fiscal policy and monetary policy to promote the rural residents' consumption.展开更多
By setting the urban-rural public goods supply model,this paper evaluates the effects of coordinating supply public goods on resource allocation and welfare from efficiency and fairness,and examines the necessity and ...By setting the urban-rural public goods supply model,this paper evaluates the effects of coordinating supply public goods on resource allocation and welfare from efficiency and fairness,and examines the necessity and possibility of coordinating public goods supply in urban and rural areas. The model assumes that the population size of urban and rural areas is different,and the population can not flow freely between urban and rural areas; there are different degrees of spillover in the public goods supply. Model results show that coordinating public goods supply in urban and rural areas is the result of optimizing resource allocation efficiency,but the residents' individual utility level will not necessarily improve,so residents' willingness to support coordinated urban-rural supply is different,and public goods spillover and different tax systems are the factors that affect the residents' utility level. Finally,this paper uses the practice of coordinating urban and rural compulsory education in Chengdu City to confirm the above conclusions.展开更多
By introducing development situation of specialized cooperatives and vegetable specialized cooperatives in China,this paper discussed existing problems in the process of development of China's vegetable specialize...By introducing development situation of specialized cooperatives and vegetable specialized cooperatives in China,this paper discussed existing problems in the process of development of China's vegetable specialized cooperatives. Then,it made efficiency evaluation on typical vegetable specialized cooperatives in 3 districts of Chongqing Municipality by the DEA method. Considering traditional DEA model has drawbacks,it introduced super efficiency DEA model to make complete identification and ordering of cooperatives. On this basis,it divided efficiency value into pure technical efficiency and scale efficiency,and classified cooperatives into 4 categories according to efficiency characteristics of non-complete effective cooperatives. Finally,it came up with recommendations and countermeasures for improving efficiency of specialized cooperatives from raising technical level and increasing members of specialized cooperatives.展开更多
Background and Objective: Asthma is a major health problem and a high-burden disease in the world. Unfortunately the prevalence of asthma in adult populations in Iran is not determined precisely. The aim of this study...Background and Objective: Asthma is a major health problem and a high-burden disease in the world. Unfortunately the prevalence of asthma in adult populations in Iran is not determined precisely. The aim of this study was to assess the prevalence of asthma symptoms and it’s relation with ages, gender and smoking behaviour in city of Tehran. Methods: A telephone interview survey was conducted among 7150 randomly selected telephone numbers in city of Tehran. A questionnaire adapted from The European Community Respiratory Health Survey (ECRHS) with additional two questions about smoking behaviour and hookah. Results: From 7150 eligible telephone numbers dialled there were 5500 responses (76.92%). The study populations included 3412 female (62%), 2088 men (38%) and the mean age of responder were 31.15 ± 7.33. Their smoking behaviour were;71.6% non smoker, 11.9% active smoker, 16.5% passive smoker and 7.8% used hookah. The prevalence of “wheezing in the last 12 months”, “dyspnea with wheezing” and “wheezing and two nocturnal symptoms” were 24%, 10.8% and 5% respectively. Prevalence of asthma symptoms was significantly greater in smokers than non-smokers groups. Conclusion: In this study by using symptom based questionnaire (ECRHS), we concluded the prevalence of asthma in Tehran adult population was between 5% to 10%. Also this study may made cross-national comparison of our findings with other ECRHS studies possible;rates of “wheezing in the last 12 months”, “dyspnea with wheezing” and “nocturnal dyspnea” were higher than the European Community Respiratory Health Survey median. Role of air pollution, smoking and other risk factors for asthma should be considered.展开更多
Background: Respiratory disorders are the most common diseases among Iranian pilgrims in Hajj. Some studies recommended flu and pneumococcal vaccines separately or in combination to reduce respiratory diseases occurre...Background: Respiratory disorders are the most common diseases among Iranian pilgrims in Hajj. Some studies recommended flu and pneumococcal vaccines separately or in combination to reduce respiratory diseases occurrence and its morbidity. These effects are not clear in afflicted Hajj pilgrims. Objective: This is a cohort study that investigates the effects of above-mentioned vaccines each or their combination on respiratory syndromes and their consequences among Iranian pilgrims in Mecca. Method: The participants were 295 Iranian pilgrims from the beginning to the end of the journey. They were systematically observed for getting afflicted with a respiratory syndrome or not. In this study, we have assessed the effects of flu and pneumococcal vaccines on respiratory disease occurrence and on 8 clinical consequences including as: the duration of fever, duration of cough, duration of bed rest, presence of post nasal discharge and dirty sputum, the total disease length, and the number of referrals to the hospital, physician’s visits and complications. The data for this study were gathered through a questionnaire with 14 basic questions and 60 choices. This was processed using the SPSS software of 11.5 version, T- and Chi-square tests. Results: The results showed no significant correlations between the above-mentioned factors and vaccination with one or both flu and pneumovax-23 except for the duration of coughs which was significantly reduced in all cases (p < 0.01) and also decreased complications of the disease (p < 0.001). Conclusion: The study suggests the high-risk groups, should be vaccinated with combination of flu and pneumovax-23 vaccines in Hajj.展开更多
Firstly,this paper reviews and analyzes historic background of urban-rural integration of Chongqing,and the evolution and trend of urban and rural dual economic structure.On the basis of previous researches,it selects...Firstly,this paper reviews and analyzes historic background of urban-rural integration of Chongqing,and the evolution and trend of urban and rural dual economic structure.On the basis of previous researches,it selects factors and variables influencing urban and rural dual economic structure,and establishes an econometric model.By state space Kalman filtering method,it analyzes dynamic influence of factors upon urban-rural dual economic intensity.According to empirical conclusion,it puts forward corresponding policy recommendations for promoting integrated urban and rural economic development of Chongqing.展开更多
Introduction:Considering the importance of evidence-based medicine(EBM)and the emphasis of Persian medicine(PM)experts on its use,this study was designed;to investigate the practice of PM specialists,the obstacles,cha...Introduction:Considering the importance of evidence-based medicine(EBM)and the emphasis of Persian medicine(PM)experts on its use,this study was designed;to investigate the practice of PM specialists,the obstacles,challenges,and solutions of developing and using EBM in PM were also the aims of the present study.Method:In the present study,98 PM specialists,who work in Iran completed the electronic Persian version of the evidence-based medicine.The effective factors in the practice of specialists were assessed by Spearman correlation and Mann-Whitney U tests.Results:The mean±standard deviation of age,graduation time,and clinical experience were 44.52±6.45,3.26±2.28,and 6.76±5.27 years,respectively.Evaluating the data showed,that 52 participants(53.1%)had not passed any EBM training courses.Social media,general and medical databases,textbooks,colleagues,and journal articles were used frequently in clinical practices,but the specific EBM-specific resources were neglected.Conclusions:More attention must be paid to produce scientific evidence,improving the infrastructures and health policies,and empowering PM specialists to apply EBM in their clinical practices.展开更多
1 Introduction Environmental factors such as maternal nutrition during intrauterine development may program the neuroendocrine system and alter its function in later life (Cerf et al., 2012). It is demonstrated tha...1 Introduction Environmental factors such as maternal nutrition during intrauterine development may program the neuroendocrine system and alter its function in later life (Cerf et al., 2012). It is demonstrated that meta- bolic diseases have their origin in early life nutritional experience such as maternal high-fat (HF) diet con- sumption during gestation and lactation (Srinivasan et al., 2006). The changes in energy balance and cells' response to insulin are the important metabolic changes in the offspring of HF-fed dams (Sullivan et al., 2015). Maternal HF diet consumption increased abdominal fat in dams at the end of the lactation pe- riod with increased (Jacobs et al., 2014) or without any change (Desai et al., 2014) in leptin plasma level.展开更多
When the examination system was fast initiated, it did not attract much attention, and while it existed, it was the subject of unending criticism. However, it had a tenacious vitality, so much so that it is still ofte...When the examination system was fast initiated, it did not attract much attention, and while it existed, it was the subject of unending criticism. However, it had a tenacious vitality, so much so that it is still often referred to despite its exit from the stage of history.展开更多
基金Sponsored by Youth Program of National Social Science Foundation(12CGL063)Youth Program of Humanities and Social Science Foundation of the Ministry of Education(13YJC790101)+2 种基金Basic Scientific Research Program of Central Universities(SWU1309392)Youth Program of Chongqing Social Science Planning(2012QNJJ011)2011 Key Projects of Chongqing Humanities and Social Science Key Research Center(Agricultural Education Development Research Center of Southwest University)
文摘Current entrepreneurship education and practices in colleges and universities of China against the background of new countryside construction were analyzed,and compared with foreign practices.SWOT analysis was adopted to further elaborate current entrepreneurship education and practices in agricultural and forestry colleges and universities of China.Driven by education courses and practices,a sound course and practice system was established by considering characteristics and specialties of agricultural and forestry colleges and universities,which was significant for undergraduates from agricultural and forestry colleges and universities who want to start their own business,and also for the construction of new socialist countryside.
基金Supported by Key National Social Science Fund Project(12&ZD100)Key Humanities and Social Sciences Project in Chongqing City(11SKB36,12SKB003)+1 种基金Fundamental Research Funds for Central Universities(SWU1309375,SWU1309003,SWU1309386)Teaching Reform Project of Southwest University(2013JY087)
文摘The synchronous development of industrialization,urbanization,agricultural modernization and informatization is the basic trend and future requirements of China's economic and social development. By using the relevant data of 1978- 2011,and establishing the VAR model,we find that in the short term,industrialization is the Granger cause of urbanization; urbanization is the Granger cause of industrialization,informatization,and agricultural modernization; agricultural modernization is the Granger cause of industrialization,informatization and urbanization; informatization is the Granger reason of industrialization,urbanization and agricultural modernization. In the long run,there are long-term and stable relations among them,and at the same time,their changes affect the structure of each other,and there are pulling effect among them.
基金supported by funding of Educational Development Research Center of Southern Xinjiang.
文摘Background:Adolescent anxiety has a significant impact on physical and mental health,and overparenting is recognized as one of the major factors affecting adolescent anxiety.The objective of this study was to investigate the relationship between overparenting and adolescent anxiety,while also examining the mediating role of cognitive avoidance.Methods:Data were collected through a cross-sectional survey with 1931 valid responses using the Overparenting Scale,the Cognitive Avoidance Scale,and the Anxiety Self-Rating Scale.A structural equation modelling approach was used to test the mediating role of cognitive avoidance between overparenting and adolescent anxiety and to reveal the underlying mechanisms.The significance of the mediating effect was assessed based on maximum likelihood estimation.Differences in the mediating role of cognitive avoidance in the male and female samples were comparatively analyzed in the mediation effect analysis.Results:The study’s findings reveal a significant positive correlation between overparenting and adolescent anxiety(p<0.01),between overparenting and cognitive avoidance(p<0.01),and between cognitive avoidance and adolescent anxiety(p<0.01).Cognitive avoidance mediated the relationship between overparenting and adolescent anxiety.Overparenting can not only directly predict adolescent anxiety but also indirectly predict it through the mediating role of cognitive avoidance.Conclusion:This study validates the direct effect of overparenting on adolescent anxiety and reveals the mechanism of cognitive avoidance as a mediator.
文摘BACKGROUND In myelodysplastic syndrome(MDS),oxidative stress is closely related to iron overload and DNA damage.A recent study suggested the possibility that increased oxidative stress causes not only iron overload but also disease progression of MDS with DNA damage.We present a case of MDS with decreased reactive oxygen species(ROS)production in peripheral white blood cells(WBCs)and decreased diacron-reactive oxygen metabolites(d-ROMs)in serum after azacitidine therapy.CASE SUMMARY A 74-year-old man presented to the hematological department with the chief complaint of anemia.His vital signs were within normal limits at admission with a heart rate of 80 bpm and blood pressure of 135/60 mmHg.Laboratory tests indicated pancytopenia,a WBC count of 2190 cells/μL,a hemoglobin level of 6.2 g/dL and a platelet count of 7.4×104/μL.The patient was diagnosed with MDS with fibrosis after a bone marrow examination.This case showed decreased ROS production in WBCs,d-ROMs in serum and Wilms’tumor 1 after azacitidine therapy,after which his hematopoiesis recovered.CONCLUSION Azacitidine therapy can improve hematopoiesis and decrease ROS and d-ROM production.
基金Supported by Chongqing Social Science Planning Project(2010YBJJ13)the Fundamental Research Funds for the Central Universities(XDJK2010C103)+1 种基金Humanities and Social Sciences Youth Project,the Ministry of Education(10YJC630205)Chongqing Key Humanities and Social Sciences Project(SWU 0810026)
文摘Based on the characteristics of urban-rural dual economic structure in China,we build a dynamic endogenous urban-rural dual economic model closely linked to China's reality,and carry out mathematical economics analysis of optimized conditions for urban and rural sectors. The main results show that:(i) The labor growth rate of urban-rural sectors must be greater than the time discount rate,or else there would be a vicious cycle of diminishing returns in the sectors;(ii) The accumulation rate of physical capital and human capital of urban-rural sectors,and the rate of technological progress,need to be greater than the corresponding depreciation rate plus the time discount rate,otherwise there would be a vicious cycle of diminishing returns in the sectors;(iii) The low accumulation rate in the rural sector,and the occurrence of labor outflow,human capital loss and lack of investment,will expand income gap between urban and rural areas,which is a reason for solidification of urban-rural dual economic structure.
文摘The aim of the study was to investigate the effect of different surface treatment of titanium(Ti)on the adhesion test results for dental application.Ti substrates roughened by 400 to 1500-grit SiC polish papers and alumina blasting,alkali treated by 5 molar(M)NaOH and KOH solutions and heat treated at the temperature range of 400-800℃were used in this study.The treated samples were subjected to the adhesion test.According to the results of the adhesion test,the adhesive strength showed the highest value for the blasted titanium among all polished and blasted samples.The Ti samples heated at 650℃showed the highest adhesive strength among all heat-treated samples.Further,the adhesion test results indicated the higher adhesive strength of chemically treated samples treated by NaOH rather than that by KOH.The polished and heated Ti samples showed the highest adhesive strength among all samples.
基金Noor Ophthalmology Research CenterShahroud University of Medical Sciences
文摘AIM:To compare central corneal thickness(CCT) and anterior chamber depth(ACD) measurements using rotating Scheimpflug imaging and partial coherence interferometry.·METHODS:As part of the first phase of Shahroud Eye Cohort Study with 5 190 subjects of 40 to 64 years of age,CCT and ACD were measured using Scheimpflug imaging with the Pentacam(Oculus,Inc.,Lynnwood,WA,USA) and partial coherence interferometry with the Allegro BioGraph(Wavelight,Erlangen,Germany).·RESULTS:After applying exclusion criteria,we had data of 4 387 subjects with a mean age of 50.7±6.2 years.Mean CCT with Pentacam and BioGraph were 528.6 ±33.2μm and 525.6 ±32μm respectively;the difference was statistically significant(P 【0.001),but the correlation was high(R=0.920).Mean ACD measurements using Pentacam and BioGraph were 2.68 ±0.35mm and 2.62 ±0.33mm respectively;the inter-device difference was significant(P 【0.001) with high correlation(R=0.944).The 95% limits of agreements between devices were-22.65μm to28.61μm and-0.16mm to 0.29mm for CCT and ACD measurements,respectively.·CONCLUSION:For both CCT and ACD,the BioGraph gave significantly lower values than the Pentacam(P 【0.05).Despite the high inter-device correlation,the 95%limits of agreements were wide,and this may limit their interchangeability in measuring the CCT and ACD.
文摘AIM: To describe the frequency of H pylori infection among 1000 southern Iranian dyspeptic patients. METHODS: A prospective study was performed in a referral hospital in south of Iran from 1999 to 2005. One thousand dyspeptic patients (518 males, mean ± SD age of 49.12 ± 12.82 years) consecutively underwent upper gastrointestinal endoscopy. Multiple gastric antral biopsy samples were taken from all patients for rapid urease test and histopathologic examination (96.9% satisfactory samples). Patients were considered H pylori-infected if one or both tests were positive. RESULTS: Six hundred and seventy-one patients (67.1%, 95% confidence interval [CI]: 64.2%-70.0%) were H pylori-infected. H pylori positivity was significantly more frequent in patients with peptic ulcer disease (PUD) than in those with non-ulcer dyspepsia (P < 0.001). Male-to-female ratio for duodenal and gastric ulcers was 2.7:1 and 1.5:1, respectively. Moreover, the duodenal- to-gastric ulcer ratio was 1.95:1. The frequency of H pylori infection among those with endoscopic diagnosis of gastritis, duodenal ulcer, gastric ulcer, and normal mucosa was 70.1% (398/568), 86.2% (150/174), 71.9% (64/89), and 33.5% (54/161), respectively. H pylori infection, male sex, and older age were independently associated with PUD in multivariate analysis. H pylori positivity was associated with chronic gastritis, and chronic active gastritis with odds ratios of 34.21 (95% CI: 12.19%-96.03%) and 81.21 (95% CI: 28.85%-228.55%), respectively. CONCLUSION: H pylori and PUD are highly frequent in dyspeptic patients from south of Iran. H pylori is a cardinal risk factor for chronic active or inactive gastritis.
基金Sponsored by Key Projects of Chongqing Humanities and Social Science Key Research Center(Agricultural Education Development Research Center of Southwest University)(10SKB03,11SKB32)Youth Program of National Social Science Foundation(12CGL063)+2 种基金Youth Program of Humanities and Social Science Foundation of the Ministry of Education(13YJC790101)Basic Scientific Research Program of Central Universities(SWU1309392)Youth Program of Chongqing Social Science Planning(2012QNJJ011)
文摘Relationship between Chinese rural non-agricultural employment and farmland use circulation has always been a hot research topic without final conclusions.This paper uses survey data of"China Health and Retirement Longitudinal Study(CHARLS)"covering 1,549 households of 95 villages in Zhejiang and Gansu Province in 2008.According to the data analysis,Zhejiang Province has a higher ratio of rural households leasing out their farmland than Gansu Province has,while the latter has a higher ratio of rural residents going out for earning a living.In both provinces,non-agricultural employment and farmland use circulation show significant positive correlation,but in Gansu,non-agricultural employment of farmers shows no significant positive correlation with rural households leasing out their farmland.The factor shows that for peasants in underdeveloped regions of west China,they rely more on land because of its social security functions,so they are not willing to lease out their land even when they go to cities for earning a living.For local government,it is not appropriate to promote farmland use circulation by depending on the transfer of rural labor forces,fundamental needs of peasants must be taken into consideration.
基金Supported by Chongqing Humanities and Social Science Key Research Institute Fund Project(11SKB36,12SKB003)Key Project Sponsored by the National Education Science 11th Five Year Plan Program of the Ministry of Education(DJA090268)Fundamental Research Funds for the Central Universities(SWU1309375,SWU1309386)
文摘This paper conducts an empirical analysis of influence of fiscal expenditure supporting agriculture monetary supply on rural residents' s consumption by adopting a vector auto-regression model,based on the data from 1978 to 2011.The study indicated that:in the short term,fiscal policy is the Granger reason of rural residents' consumption,monetary policy is not the Granger reason of rural residents' consumption;in the long term,the comprehensive function of fiscal policy and monetary policy has a great influence on the of rural residents' consumption.Under the background of Economic Transition and Urbanization,Expanding Domestic Demand is the slogan.We should coordinate fiscal policy and monetary policy to promote the rural residents' consumption.
基金Supported by Fundamental Research Funds for Central Universities,Southwest University(SWU1109028)Southwest University Youth Foundation(SWU07104)Key Humanities and Social Sciences Research Project in Chongqing City(13SKB022)
文摘By setting the urban-rural public goods supply model,this paper evaluates the effects of coordinating supply public goods on resource allocation and welfare from efficiency and fairness,and examines the necessity and possibility of coordinating public goods supply in urban and rural areas. The model assumes that the population size of urban and rural areas is different,and the population can not flow freely between urban and rural areas; there are different degrees of spillover in the public goods supply. Model results show that coordinating public goods supply in urban and rural areas is the result of optimizing resource allocation efficiency,but the residents' individual utility level will not necessarily improve,so residents' willingness to support coordinated urban-rural supply is different,and public goods spillover and different tax systems are the factors that affect the residents' utility level. Finally,this paper uses the practice of coordinating urban and rural compulsory education in Chengdu City to confirm the above conclusions.
基金Young Scholar Project of Humanities and Social Science Foundation of Ministry of Education(13YJC790101)Young Scholar Social Science Planning Project of Chongqing(2012QNJJ011)+1 种基金Major Project of KeyResearch Base of Humanities and Social Science of Chongqing Municipality(11SKB32)Fundamental Research Funds for the Central Universities(SWU1309392 and SWU1409124)
文摘By introducing development situation of specialized cooperatives and vegetable specialized cooperatives in China,this paper discussed existing problems in the process of development of China's vegetable specialized cooperatives. Then,it made efficiency evaluation on typical vegetable specialized cooperatives in 3 districts of Chongqing Municipality by the DEA method. Considering traditional DEA model has drawbacks,it introduced super efficiency DEA model to make complete identification and ordering of cooperatives. On this basis,it divided efficiency value into pure technical efficiency and scale efficiency,and classified cooperatives into 4 categories according to efficiency characteristics of non-complete effective cooperatives. Finally,it came up with recommendations and countermeasures for improving efficiency of specialized cooperatives from raising technical level and increasing members of specialized cooperatives.
文摘Background and Objective: Asthma is a major health problem and a high-burden disease in the world. Unfortunately the prevalence of asthma in adult populations in Iran is not determined precisely. The aim of this study was to assess the prevalence of asthma symptoms and it’s relation with ages, gender and smoking behaviour in city of Tehran. Methods: A telephone interview survey was conducted among 7150 randomly selected telephone numbers in city of Tehran. A questionnaire adapted from The European Community Respiratory Health Survey (ECRHS) with additional two questions about smoking behaviour and hookah. Results: From 7150 eligible telephone numbers dialled there were 5500 responses (76.92%). The study populations included 3412 female (62%), 2088 men (38%) and the mean age of responder were 31.15 ± 7.33. Their smoking behaviour were;71.6% non smoker, 11.9% active smoker, 16.5% passive smoker and 7.8% used hookah. The prevalence of “wheezing in the last 12 months”, “dyspnea with wheezing” and “wheezing and two nocturnal symptoms” were 24%, 10.8% and 5% respectively. Prevalence of asthma symptoms was significantly greater in smokers than non-smokers groups. Conclusion: In this study by using symptom based questionnaire (ECRHS), we concluded the prevalence of asthma in Tehran adult population was between 5% to 10%. Also this study may made cross-national comparison of our findings with other ECRHS studies possible;rates of “wheezing in the last 12 months”, “dyspnea with wheezing” and “nocturnal dyspnea” were higher than the European Community Respiratory Health Survey median. Role of air pollution, smoking and other risk factors for asthma should be considered.
文摘Background: Respiratory disorders are the most common diseases among Iranian pilgrims in Hajj. Some studies recommended flu and pneumococcal vaccines separately or in combination to reduce respiratory diseases occurrence and its morbidity. These effects are not clear in afflicted Hajj pilgrims. Objective: This is a cohort study that investigates the effects of above-mentioned vaccines each or their combination on respiratory syndromes and their consequences among Iranian pilgrims in Mecca. Method: The participants were 295 Iranian pilgrims from the beginning to the end of the journey. They were systematically observed for getting afflicted with a respiratory syndrome or not. In this study, we have assessed the effects of flu and pneumococcal vaccines on respiratory disease occurrence and on 8 clinical consequences including as: the duration of fever, duration of cough, duration of bed rest, presence of post nasal discharge and dirty sputum, the total disease length, and the number of referrals to the hospital, physician’s visits and complications. The data for this study were gathered through a questionnaire with 14 basic questions and 60 choices. This was processed using the SPSS software of 11.5 version, T- and Chi-square tests. Results: The results showed no significant correlations between the above-mentioned factors and vaccination with one or both flu and pneumovax-23 except for the duration of coughs which was significantly reduced in all cases (p < 0.01) and also decreased complications of the disease (p < 0.001). Conclusion: The study suggests the high-risk groups, should be vaccinated with combination of flu and pneumovax-23 vaccines in Hajj.
基金Supported by Social Science Planning Project of Chongqing(2010YBJJ13)the Fundamental Research Funds for the Central Universities(XDJK2010C103)Ph.D Foundation Project of Southwest University(SWU1209303)
文摘Firstly,this paper reviews and analyzes historic background of urban-rural integration of Chongqing,and the evolution and trend of urban and rural dual economic structure.On the basis of previous researches,it selects factors and variables influencing urban and rural dual economic structure,and establishes an econometric model.By state space Kalman filtering method,it analyzes dynamic influence of factors upon urban-rural dual economic intensity.According to empirical conclusion,it puts forward corresponding policy recommendations for promoting integrated urban and rural economic development of Chongqing.
文摘Introduction:Considering the importance of evidence-based medicine(EBM)and the emphasis of Persian medicine(PM)experts on its use,this study was designed;to investigate the practice of PM specialists,the obstacles,challenges,and solutions of developing and using EBM in PM were also the aims of the present study.Method:In the present study,98 PM specialists,who work in Iran completed the electronic Persian version of the evidence-based medicine.The effective factors in the practice of specialists were assessed by Spearman correlation and Mann-Whitney U tests.Results:The mean±standard deviation of age,graduation time,and clinical experience were 44.52±6.45,3.26±2.28,and 6.76±5.27 years,respectively.Evaluating the data showed,that 52 participants(53.1%)had not passed any EBM training courses.Social media,general and medical databases,textbooks,colleagues,and journal articles were used frequently in clinical practices,but the specific EBM-specific resources were neglected.Conclusions:More attention must be paid to produce scientific evidence,improving the infrastructures and health policies,and empowering PM specialists to apply EBM in their clinical practices.
基金Project supported by the Grant from the Research Deputy of Faculty of Medicine,Shahid Beheshti University of Medical Sciences(No.13/542),Iran
文摘1 Introduction Environmental factors such as maternal nutrition during intrauterine development may program the neuroendocrine system and alter its function in later life (Cerf et al., 2012). It is demonstrated that meta- bolic diseases have their origin in early life nutritional experience such as maternal high-fat (HF) diet con- sumption during gestation and lactation (Srinivasan et al., 2006). The changes in energy balance and cells' response to insulin are the important metabolic changes in the offspring of HF-fed dams (Sullivan et al., 2015). Maternal HF diet consumption increased abdominal fat in dams at the end of the lactation pe- riod with increased (Jacobs et al., 2014) or without any change (Desai et al., 2014) in leptin plasma level.
文摘When the examination system was fast initiated, it did not attract much attention, and while it existed, it was the subject of unending criticism. However, it had a tenacious vitality, so much so that it is still often referred to despite its exit from the stage of history.