1.A positive analysis of China's health resources based on the Cobb-Douglas production function
Chinese Journal of Hospital Administration 1996;0(04):-
Health resources allocation, the cornerstone of health production capability, includes effective allocation of increments and rational readjustment of stocks. Using the least square method and variance analysis, the authors created a multilinear regression model on the basis of the calculation method and analysis principle of the Cobb-Douglas production function and in light of historical data in China's health sector and made a positive analysis of the current state of health resources allocation in China The result indicates that the input in health human resources has been insufficient and their contribution to production has been on the moderate side. Moreover, health resources allocation has shown decreasing return to scale on the whole.
2.The laboratory and clinical diagnosis strategy in MYH9 disorders
Chinese Journal of Laboratory Medicine 2013;(5):475-478
Myosin heavy chain 9 (MYH9)disorders are a group of ihherited thrombocytopenias resulted from the mutation of MYH9 gene,including May-Hegglin anomaly,Epstein syndrome,Fechtner syndrome and Sebastian syndrome.MYH9 disorders are very often misdiagnosed as idiopathic thrombocytopenic purpura (ITP).For better understanding of MYH9 of clinical and laboratory and getting enough attention in clinical practice,this review will focus on the pathogenesis,clinical manifestations,laboratory examination and differential diagnosis.
3.Application of Two-dimensional Liquid Chromatography Analysis of Drugs and Toxicants
Weibin XIAO ; Yang JIAN ; Hua LI
Chinese Journal of Analytical Chemistry 2014;(12):1851-1858
Qualitative and quantitative analyses of biological samples containing drugs, toxicants and endogenous substances play an important role in the researches of life sciences, as well as in new drug discovery and development. Biological samples are characterized by complex matrix, multiple endogenous interferences, significantly lower concentrations of measured analytes compared to endogenous components and small sampling volume. Consequently, it often requires bioanalysis methods with superior specificity, high sensitivity and good reproducibility. The two-dimensional liquid chromatography (2D-LC) technique, which allows for high peak capacity, significant reduced matrix effect and carryover of complex matrix samples and automated sample pre-treatment and analysis, has been the powerful solution to the separation and analysis of biological sample and widely applied to environment, food and pharmaceutical analysis. On the basis of introduction of the principle and equipments of 2D-LC, the application of this technique in the pharmacokinetics, toxicological and biological study was reviewed.
4.Experimental Study on Antitumor Effects of Total Glycoside of Cimicifuga dahurica Maxim.
Li CAO ; Weibin YANG ; Ruile PAN
Chinese Journal of Information on Traditional Chinese Medicine 2006;0(12):-
Objective To investigate the antitumor effects of total glycoside of Cimicifuga dahurica (TGCD) in vivo and in vitro, and further explore its mechanisms. Methods The anti-tumor activity in vitro was determined by MTT assay and the anti-tumor activity in vivo was evaluated using experimental mouse tumor (S180) model and human tumor (A549) xenografts in nude mice. After treatment, A549 cell apoptosis and morphologic change were evaluated by Annexin V/PI flow cytometry and HE staining. Results Inhibitory concentration 50% (IC50) of TGCD on A549, HepG2, HL60, Eca-109 and MDA-MB231 cells were 20.3, 27.1, 21.2, 23.4 and 32.7 ?g/mL respectively. Administration of TGCD (100 or 200 mg/kg) inhibited S180 solid tumor development in mice, the inhibition rates were 42.8% and 54.6% respectively. Administration of TGCD (100 or 200 mg/kg) inhibited A549 tumor growth with a T/C (mean value of treated group/mean value of control group) value of 58.1% and 52.2% respectively. In addition, increased percentage of apoptotic cells induced by TGCD in human A549 nude mice xenografts and the histopathological changes including cell shrinkage and condensation of chromosomes were observed. Conclusion TGCD has demonstrated antitumor bioactivity both in vitro and in vivo, which may be related to its effects of inducing apoptosis activity.
5.Mood congruency of involuntary autobiographical memories in college students with different moods
Weibin MAO ; Chengcheng MOU ; Dongmei LI ; Shu AN
Chinese Mental Health Journal 2017;31(8):648-653
Objective:To explore whether there is mood congruency effect of involuntary autobiographical memories among different mood undergraduates.Methods:Totally 60 college students were induced to generate positive,negative or neutral mood by emotional pictures and music.Vigilance task paradigm was used to induce involuntary autobiographical memory in the present experiment.All participants were asked to rate the pleasantness of involuntary autobiographical memories,then the memory proportion of different valence was calculated.Two raters who had not taken part in the experiment were instructed to divide the objective memory contents into positive,negative and neutral three types.Furthermore,the number of involuntary autobiographical memories recalled was evaluated according to the valence of objective memory contents.Besides,all participants were asked to rate the mood state at the end of the experiment.Results:There was no significant difference in pleasantness ratings among different mood college students (P > 0.05).There was a significant interaction between mood state and the valence of objective memory contents (P < 0.01).Further examination of the interaction suggested the number of positive memory contents recalled was greater in positive state compared with neutral state [(6.3 ±5.5) vs.(2.8 ±2.2),P <0.01].However,there was no difference in the number of negative memory contents and neutral memory contents among different mood states (Ps > 0.05).Additionally,no matter the pleasantness ratings was positive or negative,there was no significant correlation between the proportion of memories and mood state rated at the end of the experiment (r =0.29,-0.13,Ps > 0.05).Conclusion:It suggests that there does not exist mood congruency effect of involuntary autobiographical memories among college students in different mood states.Even in negative mood state,their involuntary autobiographical memories would still display a kind of optimistic bias.
6.The Value of 256-Slice Spiral CT Angiography in Internal Thoracic Artery
Weibin CHEN ; Li FENG ; Fengling GONG ; Huiying ZHANG ; Gai LI
Tianjin Medical Journal 2013;(8):763-765
Objective To study the value of 256-slice spiral CT (MSCT) in internal thoracic artery. Methods The angiographic images of 107 patients who were suspected thoracic and abdominal aortic diseases were retrospectively ana-lyzed. The running rule and branches of internal thoracic artery on both sides were observed. Each side of the internal thorac-ic artery was divided into 3 sections according to the running rule. The lumen diameter, vessel length and its branches were measured in three segmental vascular of the internal thoracic artery. The lumen diameter of the diaphragmatic artery diame-ter,and the distance between internal thoracic artery and each border of the sternum were also measured. Results Both sides of the internal thoracic and diaphragmatic arteries were shown in 107 patients (100%). There were significant differenc-es in vascular lumen diameter of intrathoracic artery of both sides (P<0.05). There were no significant differences between both sides of the corresponding segments (P>0.05). The left internal thoracic artery was significantly longer in the left side than that of right side (P<0.05). There were no significant differences between the diameter of diaphragmatic arteries and the distance between the internal thoracic artery and the sternal edge of two sides (P>0.05). Conclusion The application of 256-slice spiral CT angiography can clearly show the running rule and anatomical features of internal thoracic artery ,and provide a relatively important clinical information.
7.Osmotic Pressure Measurement of Pirenoxinun Sodium Eye Drops
Zhihui LI ; Haiyan TIAN ; Honghai LIU ; Haixia LI ; Weibin LIU
China Pharmacist 2015;(3):513-514,515
Objective:To investigate the feasibility and accuracy of osmometer in the osmolarity measurement of pirenoxinun sodi-um eye drops. Methods:An osmometer was used to measure the osmolarity of pirenoxinun sodium eye drops, and the stability of the osmolality was studied. Results:The osmolarity of pirenoxinun sodium eye drops with different formula conformed to the requirement of ophthalmic preparations. The osmolality showed no significant change at the ambient temperature, indicating the stability of the prepa-ration. Conclusion:The method is simple, rapid and practical, which can be used as the osmolarity measurement method for pirenoxi-nun sodium eye drops.
8.Computed tomographic methods and findings in adenomyomatosis of the gallbladder
Weijun PENG ; Kangrong ZHOU ; Renchen LI ; Weibin SHI ; Huiming CHEN
Chinese Journal of Radiology 1994;0(06):-
Objective To describe the characteristic CT imaging of adenomyomatosis of gallbladder and to improve the diagnostic knowledge of the disease. Methods Eleven (5 males and 6 females, mean age = 43 years) patients with adenomyomatosis of gallbladder (4 diffuse, 2 segmental, and 5 fundal) confirmed by histopathology and performed by CT examination including plain, dynamic or multiphase enhancement and / or oral cholegraphic agent were reviewed. Results Correct diagnosis was made in 7 of 11 patients(3 diffuse, 1 segmental, and 3 fundal). CT findings included segmental or diffuse gallbladder wall thickening in the involved area, associated with well defined and regular borders at both of the inner and outer layers. Significant CT findings of this entity were marked enhancement of wall layers during triphase contrast CT scanning, especially at delayed scans. Rokitansky Aschoff sinuses were clearly shown by CT, presenting as characteristic "aureola " sign, when performed with application of a cholegraphic agent. Conclusion Understanding the CT findings and using the optimal methods, we can use CT scan as a valuable method to help make the diagnosis in most cases of adenomyomatosis.
9.Study on calcium signal transduction pathway in hippocampal neurons of mice with vascular dementia and the effects of dihydroergocriptine
Peiyuan LU ; Yu YIN ; Weibin WANG ; Cuiping LIANG ; Wenbin LI
Chinese Journal of Geriatrics 2001;0(03):-
Objective To investigate the calcium signal transduction pathway in hippocampal neurons of mice with vascular dementia (VaD) and the intervention effect of dihydroergocriptine (DHE). Methods The mice were subjected for ischemia-reperfusion repeatedly on bilateral common carotid arteries by knots to establish the VaD models. Animals with sham-operation were taken as control group. The treating group was administered with DHE after the establishment of VaD model. The behavior changes were observed through the step-down avoidance test and water maze test on the 29th and 30th days after operation. The resting 〔Ca 2+〕 i level of hippocampal neurons was evaluated by laser scanning confocal microscopy. RT-PCR technique was used to measure mRNA expression of CaM an CaMPKⅡ in hippocampal neurons. Results The resting 〔Ca 2+〕 i level in model group(43.50?3.00) was significantly higher than those in the sham-operation group (25.50?3.50) (P
10.The anatomical relationship of the internal thoracic artery and coronary artery evaluated by 256 slice spiral CT
Weibin CHEN ; Li FENG ; Fengling GONG ; Huiying ZHANG
Tianjin Medical Journal 2015;(9):1056-1058,1059
Objective To evaluation the anatomy relationship between thoracic artery and coronary artery by using 256 layer spiral CT angiography. Methods The angiographic images of thoracic aortic and coronary artery angiography were re?vealed in 200 patients with chest pain. Values of the major branch length, diameter, length of the aorta-coronary artery by?pass on both sides of the thoracic artery and coronary artery were measured. Results The diameter of thoracic artery was (2.52±0.38) mm, and the length of thoracic artery from the starting point to terminal was (190.12 ±1.90) mm. There were no significant differences in the thoracic artery lumen diameter and length between both sides. The inner diameters of left anteri?or descending coronary artery, left circumflex, diagonal branch, right coronary artery and the posterior interventricular branch were (2.82 ±0.25), (2.60±0.12), (2.22±0.25), (3.02±0.27) and (2.35±0.35) mm respectively. There were no significant differences in thoracic artery diameters except for the right coronary artery diameter, which was higher than that of the thorac?ic artery. About free transplantation the length from 2cm above in the ascending aorta starting to the halfway point of anterior descending coronary artery, to the atrioventricular node along the left circumflex way, to the atrioventricular node along the right coronary artery and from the atrioventricular node to halfway point of posterior interventricular branch was shorter than that of thoracic artery (P<0.05). About situ transplantation in addition to the length from the thoracic artery start department to the point of anterior descending compared with the thoracic artery length, there were no statistical significance ( P>0.05). The length from the thoracic artery start department to the left-hand atrioventricular node, to the right coronary artery atrio?ventricular node was higher than that of the thoracic artery length (P<0.05). Conclusion The branches of internal thoracic artery and coronary artery are similar. About situ transplantation is suitable for the wall blood vessels before the heart. With free thoracic artery transplantation, its length can meet any bridging from the ascending aorta to the coronary arteries.