Object To study the micro morphological characteristics of the leaf and stem epidermis of three species in Rabdosia (Bl ) Hassk Methods The leaf and stem epidermis of Rabdosia amethystoides (Benth ) Hara, R macrocalyx (Dann) Hara and R nervosa (Hemsl ) C Y Wu et H W Li were observed by scanning electron microscope (SEM) Results Some characteristics are same among three species, such as elliptical stoma and glandular scale which has four cells, but some characteristics are di fferent, such as the shape of epidermal cell, the distribution of nonglandular hair, the shape of stoma Conclusion The leaf and stem epidermal characteristics are obviously different among the three species, it provides the new reference to discriminate the plants of Rabdosia (Bl ) Hassk

To determine the number average molecular mass of chitosan-oligosaccharide by u-sing the acetylacetone's method based on the color-producing reaction with amino terminal . Via the tests on the repetitiveness, accuracy and the stability, supposed this method was reliable. At the same time, the contrastive results of HPLC and the traditional K3Fe(CN)6 method indicate that the acetylacetone method was more suitable for the determination of chitosan-oligosaccharide molecular mass.

Lysophosphatidylcholines belong to a group of lipid components which have a variety of physiological functions. LPCs are known to be linked to metabolic disorders and cardio-vascular diseases,including diabetes,atherosclerosis and dyslip-idemia.LPCs are actively metabolized in liver,which is closely related with liver diseases and hepatotoxicity.The role of LPCs in liver diseases and hepatotoxicities has been extensively investi-gated recently.This review focuses on lysophosphatidylcholines as a biomarker for liver diseases,such as hepatic carcinoma, cholestasis,cirrhosis,hepatitis,and chemical hepatotoxicities, trying to lay a basis for investigation and therapeutics of liver dis-eases.

Compound membranes of chitosan/hydroxyapatite were prepared by blending. The physical performance showed that the air-water contact angles decreased from chitosan's 103 degrees to chitosan/hydroxyapatite's 57 and the water adsorption rate increased slightly. When immersed into culture medium, the materials adsorbed Ca2+, and low crystalline hydroxyapatite deposited on the surface of the membranes. Chitosan/hydroxyapatite compound membranes could enhance the attachment and proliferation of mescenchymal stem cells (MSCs). After 12 days' induction on the materials, the alkaline phosphatase (ALP) activity value of MSCs on the compound membrane was 10.1, being much higher than 1.6 on chitosan membrane (P<0.01). All these results indicate that chitosan does not have very good affinity for MSCs, but the biocompatibility of chitosan can be apparently enhanced after mixing with hydroxyapatite. The compound membrane stimulates MSCs to differentiate into osteoblasts and it may be a good potential material for bone substitution.
Alkaline Phosphatase ; metabolism ; Animals ; Bone Substitutes ; pharmacology ; Cell Proliferation ; drug effects ; Cells, Cultured ; Chitosan ; chemical synthesis ; pharmacology ; Durapatite ; chemical synthesis ; pharmacology ; Membranes, Artificial ; Mesenchymal Stromal Cells ; cytology ; Rats

Objective To investigate the differences of HCV infection rates among blood donors of different Chinese nationalities.Methods Anti-HCV results from more than 300000 blood donors of 41 nationalities from 8 provinces or autonomous regions were investigated and analyzed.Serum anti-HCV antibody was tested by ELISA.Results(1)The anti-HCV prevalence rate was 0.98%(676/68782) among first time blood donors;0.71%(1750/245137) among repeated donors;and the overall anti-HCV prevalence rate among all the blood donors was 0.77%(2426/313919).The anti-HCV prevalence rate was higher among first time donors,compared to repeated donors(P

Objective To investigate the seasonal Aedes population fluctuation and the resistance of Aedes populations to common insecticides in Jiangsu Province in 2020, so as to provide insights into vector-borne infectious diseases control.. Methods One village was randomly sampled from each of Xinbei District of Changzhou City and Zhangjiagang County of Suzhou City in southern Jiangsu Province, Hai’an County of Nantong City and Yandu District of Yancheng City in Central Jiangsu Province, and Suining County of Xuzhou City and Sihong County of Suqian City in northern Jiangsu Province during the period between May and October, 2020. A small ponding container was sampled, and larval Aedes mosquitoes were collected using straws once each in early and late stages of each month. All larvae were bred in laboratory to adults for population identification. In addition, larval breeding were observed in all small ponding containers in and out of 30 households that were randomly sampled from six surveillance sites, and the larval mosquito density was estimated using Breteau index. Larval A. albopictus mosquitoes were sampled around Cuiyuan New Village in Jintan District of Changzhou City, and bred in laboratory to the first offspring generation, and the susceptibility of adult female mosquitoes to deltamethrin, lambda-cyhalothrin, malathion, and propoxur was tested using the filter-paper bioassay recommended by WHO. Results A total of 1 165 larval Aedes mosquitoes were captured from small ponding containers in six surveillance sites of Jiangsu Province in 2020, and all were identified as A. albopictus following eclosion. The largest number of Aedes larvae captured was found in July. A total of 1 152 households were investigated in six surveillance sites, and the mean Breteau indexes were 9.58, 13.20, 13.71, 13.20, 12.18 and 5.58 from May to October, respectively, while a high Aedes transmission risk was seen in Xinbei District of Changzhou City, with a higher Breteau index than in Suining (H = 23.667, P_adjusted = 0.001) and Sihong (H = 22.500, P_adjusted = 0.003) counties. The field-captured A. albopictus from Cuiyuan New Village in Jintan District of Changzhou City remained sensitive to malathion, but was resistant to propoxur, and developed high-level resistance to deltamethrin and lambda-cyhalothrin. Conclusions A. albopictus was present in southern, central and northern Jiangsu Province in 2020, and the larval density peaked in July. A. albopictus captured from Cuiyuan New Village in Jintan District of Changzhou City has developed high-level resistance to pyrethroid pesticides.