[Objective] This study aimed to investigate the effects of traditional Chinese herbal medicine on the structure of duodenal mucosa of chickens under heat stress. [Method] One hundred and twenty 88-day-old Isa Brown ch...[Objective] This study aimed to investigate the effects of traditional Chinese herbal medicine on the structure of duodenal mucosa of chickens under heat stress. [Method] One hundred and twenty 88-day-old Isa Brown chickens were randomly divided into six groups, including three control groups （normal temperature control group, high temperature control group, high temperature Vc control group） and three high-temperature administration groups （high-dose administration group, moderate-dose administration group, low-dose administration group）. Chickens in normal temperature control group were reared at 14-25 ℃, and those in other five groups were reared at 28-39 ℃. The experiment lasted 10 d. Five chickens in each group were euthanized at 1, 4, 8 and 10 d post-treatment, respectively. The duodenal mucosa was collected and prepared into tissue slices with the conventional method for hematoxylin-eosin （HE） staining. Mucosal thickness, villus length and crypt depth of duodenal mucosa were measured. [Result] Under heat stress, duodenal mucosal thickness and villus length were both significantly lower than those in normal temperature control group, and the duodenal villi were scarce and thin. However, under high temperature conditions, various indicators in high-dose and moderate-dose administration groups were higher than those in high temperature control group and high temperature Vc control group, which exhibited extremely significant differences at 8 and 10 d post-treatment, especially. Moreover, various indicators in high-dose administration group were significantly higher than those in moderate-dose and low-dose administration groups. The traditional Chinese herbal medicine prescription exhibited higher protective effects on duodenal mucosa of chickens under heat stress compared with high temperature Vc control group. [Conclusion] Under heat stress, traditional Chinese herbal medicine reduced effectively the duodenal mucosa damage in chickens.展开更多
Background To report quality control methods and baseline reproducibility data of the ultrasound measurements of carotid artery intima-media thickness in the project of Establishment of an Integrated System for Corona...Background To report quality control methods and baseline reproducibility data of the ultrasound measurements of carotid artery intima-media thickness in the project of Establishment of an Integrated System for Coronary Heart Disease Prevention and Treatment. Methods Standard ultrasound scanning and measuring protocols were established by the study group. All sonographers and readers were trained by the carotid ultrasound core lab and all digital ultrasound images were centrally read. Ten subjects were scanned twice （with 1 week interval） by 2 sonographers independently and images were read by a single reader to evaluate the sonographer variability. Twenty subjects＇ images were read twice （with 1 week interval） by a single reader to assess the reader variability and the reproducibility of IMT measured at different carotid segments. Results The intraclass correlation （ICC） of intra- and inter-sonographer and intra- reader for mean IMT measurements was 0.99, 0.98 and 0.97 respectively; while for max IMT, it was 0.97, 0.99 and 0.95 respectively. Among different carotid segments and sites, ICC for mean 1MT measurements of common carotid （CCA）, carotid artery bulb （Bulb）, internal carotid artery （ICA）, overall near wall and overall far wall was 0.97, 0.99, 0.89, 0.93 and 0.98 respectively. Conclusion The reproducibility of IMT measurements according to our protocol is acceptable, although better reproducibility is found when measuring the mean IMT than max IMT, CCA and Bulb IMT than ICA IMT, and far wall IMT than near wall IMT.展开更多
Neutron tube is a kind of accelerator neutron source, which has been applied extensively. It is mainly composed of an ion source system, an accelerator system, and a target system. The target system is one of the most...Neutron tube is a kind of accelerator neutron source, which has been applied extensively. It is mainly composed of an ion source system, an accelerator system, and a target system. The target system is one of the most important parameters of the neutron tube and it impacts directly the yield, the lifetime, and the stability. By far the relation between the property of neutron tube and target thickness has not been studied drastically in the Institute of Radiation Technology of Northeast Normal University. High-quality titanium target should be produced in order to manufacture the neutron tube with intense yield, long lifetime and high stability. In our experiment, the pure titanium film was evaporated on the ceramic target by using the evaporation technique. The impact of the thickness of the titanium film on the yield of the neutron tube was studied, and the yield of the neutron tube was on optimistic state if the thickness of titanium film was 2.2 μm. The properties of training and stability of neutron tubes with different thick titanium film target were also present in this paper.展开更多
Background Thalassemic patients demonstrate an increased rate of extracardiae vascular complications and increased carotid wall intima-media thickness （cIMT）, but very low prevalence of coronary artery disease （CAD...Background Thalassemic patients demonstrate an increased rate of extracardiae vascular complications and increased carotid wall intima-media thickness （cIMT）, but very low prevalence of coronary artery disease （CAD）. We investigated the atheroma burden by assessing the coronary artery calcium （CAC） and elMT in these patients. Methods We examined 37 patients with β-thalassemia and 150 healthy control volunteers with multi-detector computer tomography （CT） and ultrasonography to determine CAC score and cIMT, respectively. Results Propensity score matching （C-statistic： 0.88; 95% CI： 0.83-0.93） resulted in 27 pairs of patients; severe CAC was observed in 2 （7.4%） and 0 of β-thalassemia patients and healthy volunteers respectively （P = 0.5）. Median calcium score was 0 （0-0） in β-thalassemia patients and 0 （0-4） in healthy volunteers （P = 0.8）. Median intima-media thickness was higher in β-thalassemia patients compared to control group [0.45 （0.06-0.65） vs. 0.062 （0.054-0.086）; P = 0.04]. Conclusions Patients with β-thalassemia in comparison with healthy control subjects exhibit similar CAC score and increased cIMT. Our findings indicate a disparate rate of progression of atherosclerosis between coronary and extracardiac arteries in these patients lending support to the epidemiological evidence.展开更多
In the present study,we aimed to investigate the effects of linagliptin on inflammatory factors and carotid intima-media thickness(CIMT)in newly diagnosed type 2 diabetes mellitus(T2 DM)patients with carotid atheroscl...In the present study,we aimed to investigate the effects of linagliptin on inflammatory factors and carotid intima-media thickness(CIMT)in newly diagnosed type 2 diabetes mellitus(T2 DM)patients with carotid atherosclerotic disease(CAD).A total of 326 patients with newly diagnosed T2 DM complicated with CAD were randomly divided into two groups.There were 163 patients in the control group,who were treated with metformin monotherapy.There were 163 patients in the experimental group,who were treated with metformin in combination with linagliptin.The CIMT before and after treatment was measured by color Doppler ultrasound,and the contents of IL-6 and IL-1βbefore and after treatment were detected by ELISA.The levels of inflammatory factors and CIMT before and after treatment were compared between the two groups,and the correlation between IL-6,IL-1βand CIMT was studied.After 24 weeks of treatment,the levels of inflammatory factors and CIMT in the experimental group were significantly lower compared with the control group(P<0.01),and the serum levels of IL-6 and IL-1βwere positively correlated with CIMT.In the present study,we concluded that linagliptin could improve the levels of inflammatory factors and CIMT in newly diagnosed T2 DM patients with CAD,and IL-6 and IL-1βmight participate in the occurrence and development of CAD by influencing CIMT.展开更多
基金Supported by Agricultural Science and Technology Achievement Transformation Project of the Ministry of Science and Technology(2012GB2A200044)Project of Science and Technology Department of Hebei Province(13826615D)~~
文摘[Objective] This study aimed to investigate the effects of traditional Chinese herbal medicine on the structure of duodenal mucosa of chickens under heat stress. [Method] One hundred and twenty 88-day-old Isa Brown chickens were randomly divided into six groups, including three control groups （normal temperature control group, high temperature control group, high temperature Vc control group） and three high-temperature administration groups （high-dose administration group, moderate-dose administration group, low-dose administration group）. Chickens in normal temperature control group were reared at 14-25 ℃, and those in other five groups were reared at 28-39 ℃. The experiment lasted 10 d. Five chickens in each group were euthanized at 1, 4, 8 and 10 d post-treatment, respectively. The duodenal mucosa was collected and prepared into tissue slices with the conventional method for hematoxylin-eosin （HE） staining. Mucosal thickness, villus length and crypt depth of duodenal mucosa were measured. [Result] Under heat stress, duodenal mucosal thickness and villus length were both significantly lower than those in normal temperature control group, and the duodenal villi were scarce and thin. However, under high temperature conditions, various indicators in high-dose and moderate-dose administration groups were higher than those in high temperature control group and high temperature Vc control group, which exhibited extremely significant differences at 8 and 10 d post-treatment, especially. Moreover, various indicators in high-dose administration group were significantly higher than those in moderate-dose and low-dose administration groups. The traditional Chinese herbal medicine prescription exhibited higher protective effects on duodenal mucosa of chickens under heat stress compared with high temperature Vc control group. [Conclusion] Under heat stress, traditional Chinese herbal medicine reduced effectively the duodenal mucosa damage in chickens.
文摘Background To report quality control methods and baseline reproducibility data of the ultrasound measurements of carotid artery intima-media thickness in the project of Establishment of an Integrated System for Coronary Heart Disease Prevention and Treatment. Methods Standard ultrasound scanning and measuring protocols were established by the study group. All sonographers and readers were trained by the carotid ultrasound core lab and all digital ultrasound images were centrally read. Ten subjects were scanned twice （with 1 week interval） by 2 sonographers independently and images were read by a single reader to evaluate the sonographer variability. Twenty subjects＇ images were read twice （with 1 week interval） by a single reader to assess the reader variability and the reproducibility of IMT measured at different carotid segments. Results The intraclass correlation （ICC） of intra- and inter-sonographer and intra- reader for mean IMT measurements was 0.99, 0.98 and 0.97 respectively; while for max IMT, it was 0.97, 0.99 and 0.95 respectively. Among different carotid segments and sites, ICC for mean 1MT measurements of common carotid （CCA）, carotid artery bulb （Bulb）, internal carotid artery （ICA）, overall near wall and overall far wall was 0.97, 0.99, 0.89, 0.93 and 0.98 respectively. Conclusion The reproducibility of IMT measurements according to our protocol is acceptable, although better reproducibility is found when measuring the mean IMT than max IMT, CCA and Bulb IMT than ICA IMT, and far wall IMT than near wall IMT.
文摘Neutron tube is a kind of accelerator neutron source, which has been applied extensively. It is mainly composed of an ion source system, an accelerator system, and a target system. The target system is one of the most important parameters of the neutron tube and it impacts directly the yield, the lifetime, and the stability. By far the relation between the property of neutron tube and target thickness has not been studied drastically in the Institute of Radiation Technology of Northeast Normal University. High-quality titanium target should be produced in order to manufacture the neutron tube with intense yield, long lifetime and high stability. In our experiment, the pure titanium film was evaporated on the ceramic target by using the evaporation technique. The impact of the thickness of the titanium film on the yield of the neutron tube was studied, and the yield of the neutron tube was on optimistic state if the thickness of titanium film was 2.2 μm. The properties of training and stability of neutron tubes with different thick titanium film target were also present in this paper.
文摘Background Thalassemic patients demonstrate an increased rate of extracardiae vascular complications and increased carotid wall intima-media thickness （cIMT）, but very low prevalence of coronary artery disease （CAD）. We investigated the atheroma burden by assessing the coronary artery calcium （CAC） and elMT in these patients. Methods We examined 37 patients with β-thalassemia and 150 healthy control volunteers with multi-detector computer tomography （CT） and ultrasonography to determine CAC score and cIMT, respectively. Results Propensity score matching （C-statistic： 0.88; 95% CI： 0.83-0.93） resulted in 27 pairs of patients; severe CAC was observed in 2 （7.4%） and 0 of β-thalassemia patients and healthy volunteers respectively （P = 0.5）. Median calcium score was 0 （0-0） in β-thalassemia patients and 0 （0-4） in healthy volunteers （P = 0.8）. Median intima-media thickness was higher in β-thalassemia patients compared to control group [0.45 （0.06-0.65） vs. 0.062 （0.054-0.086）; P = 0.04]. Conclusions Patients with β-thalassemia in comparison with healthy control subjects exhibit similar CAC score and increased cIMT. Our findings indicate a disparate rate of progression of atherosclerosis between coronary and extracardiac arteries in these patients lending support to the epidemiological evidence.
文摘In the present study,we aimed to investigate the effects of linagliptin on inflammatory factors and carotid intima-media thickness(CIMT)in newly diagnosed type 2 diabetes mellitus(T2 DM)patients with carotid atherosclerotic disease(CAD).A total of 326 patients with newly diagnosed T2 DM complicated with CAD were randomly divided into two groups.There were 163 patients in the control group,who were treated with metformin monotherapy.There were 163 patients in the experimental group,who were treated with metformin in combination with linagliptin.The CIMT before and after treatment was measured by color Doppler ultrasound,and the contents of IL-6 and IL-1βbefore and after treatment were detected by ELISA.The levels of inflammatory factors and CIMT before and after treatment were compared between the two groups,and the correlation between IL-6,IL-1βand CIMT was studied.After 24 weeks of treatment,the levels of inflammatory factors and CIMT in the experimental group were significantly lower compared with the control group(P<0.01),and the serum levels of IL-6 and IL-1βwere positively correlated with CIMT.In the present study,we concluded that linagliptin could improve the levels of inflammatory factors and CIMT in newly diagnosed T2 DM patients with CAD,and IL-6 and IL-1βmight participate in the occurrence and development of CAD by influencing CIMT.
