Polysaccharides from Huidouba and Its Effect on Type-2 Diabetes Mellitus

To evaluate the extraction process of Huidouba polysaccharides（ HDBP） and its anti-diabetic activity,this study focused on the two contents as follows：extraction process of HDBP,which was optimized by orthogonal experiments using the extraction ratio of HDBP for the index; and bioactivity evaluation of HDBP on streptozotocin-induced diabetic rat model based on the histological,biochemical and enzyme linked immunosorbent assay（ ELISA） method for histological observation,physiological and biochemical index such as fasting blood glucose（ FBG）,nitric oxide（ NO）,malondialdehyde（ MDA）,super oxide dismutase（ SOD） and insulin level detection in pancreas tissue respectively. The results showed that HDBP extraction ratio was the highest under following conditions： the extraction temperature at 90 ℃,the extraction time of 1. 5 h,and the solid-liquid ratio at 1： 10. Compared with the normal control group and the model group,histological observation,physiological and biochemical index and insulin level in pancreas tissue significantly increased and FBG significantly decreased according to the dosage administrated. HDBP affected Streptozotocin-induced diabetic rats.

基于湿法纺丝技术构建环糊精/聚乙烯醇纤维膜及其对空气污染物的移除性能

文中探索了一种制备稳定、长时、高效移除效率和透气性的空气过滤材料的新方法。通过湿法纺丝技术制备了含β-环糊精(β-CD)的空气过滤膜(CD/PVA纤维膜),该纤维膜对PM2.5的移除效率约高达99%,其最大压差为673 Pa,QF值为0.025 Pa^(-1)(而PVA的最大压差值高达943,QF值为0.005 Pa^(-1)),表明CD/PVA纤维膜具有良好的移除率和透气性能。与商用空气过滤膜相比,CD/PVA纤维膜的移除率可以与其媲美,而透气性能远优于商用空气过滤膜,吸附30 h后,商用空气过滤膜的压差值高达865 Pa, CD/PVA纤维膜仅为284 Pa。同时,CD/PVA纤维膜可以吸附空气中的气体污染物(例如SO2),75CD/PVA对SO2移除率达到69.6%,而PVA纤维膜对SO2的移除率仅为50%。

Study on Anti-diarrhea Effect of the Prescription of 4 Tibetan Veterinary Drugs

This study was conducted to investigate the effects of extracts of 4 Tibetan veterinary drugs on bacterial diarrhea, and to guide the clinical treatment of the disease. The inhibitory effects of the extracts of the 4 Tibetan veterinary drugs, Veronica ciliate Fisch, Usnea diffracta Vain, Sophoraflavescens var. flavescens, Lamiophlomis rotata （ Benth. ） Kudo on 14 common diarrheagenic bacteria were detected by K-B diffusion method and micro-broth dilution method. Optimization was performed on prescriptions of the 4 Tibetan veterinary drugs using orthogonal design software, and a mouse bacterial diarrhea model was established with a clinical isolate, Salmonella blegdam. According to the LD50 value of the optimal prescription of the 4 Tibetan veterinary drugs, the established mouse bacterial diarrhea model was treated in 3 dose groups, i. e. , the high, middle and low dose groups （0. 060, 0. 030 and 0. 020 g/ml, respectively）. The results showed that the 4 Tibetan veterinary drugs had very good inhibitory effects on most of the tested diarrheagenic bacteria, and among them, U. diffracta had better inhibitory effects on all the tested bacteria. The optimal prescription of the d Tibetan veterinary drugs （high dose, 0.06 g/ml） exhibited very good inhibitory effect on mouse diarrhea, indicating that the prescription has very good anti-diarrhea effect, which is beneficial to the clinical treatment of such disease and the development of Tibetan veterinary drugs.

Research Progress on Saussurea Tibetan Medicine-Taking Saussurea stella Maxim. for Example

Saussurea plants have a long history of being used for disease prevention and control in Tibetan medicine, and the species have gradually changed along with the development of history. Saussurea is mainly effective in wind-expelling, blood circulation, spasmolysis, pain relief, heat-clearing and detoxification. Characteristics, major chemical constituents and pharmacological studies of Saussurea stella Maxim. were summarized in this review based on the utilization of Saussurea medicinal plants in Tibetan areas, with the aim to provide adequate theoretical bases and references for exploring the further medicinal value and development and utilization of S. stella .

Analysis of the Drug Sensitivity of Escherichia coli Isolated from Sheep in Yangling,Shaanxi Province

This study was conducted to investigate the drug sensitivity of Escherichia coli isolated from sheep, providing data reference for clinical medication. Fifty-four samples were collected from a certain sheep farm in Yangling, Shaanxi Province for E. coli isolation and identification, and K-B disk diffusion method was used to carry out the dug sensitivity test of 40 E. coli to the eight antimicrobials of spectinomycin, amikacin, tobramycin, enrofloxacin, nalidixic acid, levofloxacin, salafloxacin and ciprofloxacin. The results showed that there were 40 positive E. coli strains and the isolation rate was 74.7%. The resistance rates of the 40 E. coli to spectinomycin, amikacin,tobramycin and nalidixic acid were 85%, 95%, 97.5% and 87.5%, respectively, while the resistance rate to enrofloxacin, levofloxacin, salafloxacin and ciprofloxacin were relatively low and the resistance rates were 35%, 20%, 25% and 17.5%, respectively. The isolates showed different levels of drug resistance to eight antimicrobials and the highest resistance rate was 97.5%. It reminds that the sheep farm should strictly control the dosage according to the antimicrobial sensitive data in clinic.

Safety Evaluation of a Compound Lonicera rupicola Hook.f. et & Thomson Injection

Safety of a compound Lonicera rupicola Hook. f. et & Thomson injection was evaluated by local irritation experiments including conjunctiva,skin and muscle irritant experiments,and the effect on weight gain was studied. The results showed that the compound L. rupicola Hook. f. et & Thomson injection had no irritation to rabbit eyes and weak irritation to rabbit ears,and had relatively strong irritation to the leg muscles of the mice. Its metabolism in mice had no abnormal toxicity.

Investigation and Analysis on the Causes Affecting the Production of One Pig Farm in Southwest Region

To analyze the causes affecting production situation of one pig farm in southwest region,group leader,assistant and related staffs in the pig farm were queried,mating and delivery situation of sow and dead-culling situation ofpigletwere investigated.The results showed that(1) mating situation: mating 691 pigs,returning to love 42 pigs,abortion 4 pigs,mismatching rate was 7.59%.(2) Delivery situation: delivering 175 nests,total birth 2538,total piglet per fetus 14.5,average healthy piglet per fetus 10.12,invalid piglet rate was30.21%.Among them,mummy fetus,dead fetus,weak piglet and deformity accounted for 47.78%,35.64%,10.71% and 5.87% of invalid piglet.(3) Dead-culling situation: dead-culling rate in breeding process was 12.37%.Among them,diarrhea death wasthemain cause,accounting for 44.47%,followed by pressing,falling to the ground,disease,joint swelling,weakness and other causes,and they respectively accounted for 18.58%,13.36%,13.36%,8.56%,5.85% and 0.62%.

Identification and genetic characterization of bovine hepacivirus in China:A large scale epidemiological study

Bovine hepacivirus(BovHepV)is a novel virus that was recently discovered in Ghana and Germany in 2015.Until now,this virus has been identified in cattle population worldwide and is classified into subtypes A-G.To fully understand the epidemic situation and genetic characteristic of BovHepV in China,a total of 612 cattle serum samples were collected from 20 farms in seven provinces and municipality in China between 2018 and 2020 and were tested for the presence of BovHepV RNA via semi-nested PCR.The results demonstrated that 49(8.0%)samples were BovHepV RNA-positive.It is noted that BovHepV infection in yak was confirmed for the first time.BovHepV was detected in all the seven provinces,with the positive rate ranging from 3.1%to 13.3%,which indicates a wide geographical distribution pattern of BovHepV in China.Sequencing results revealed that 5'UTR of the 49 field BovHepV strains have a nucleotide similarity of 96.3%-100%between each other and 93.9%-100%with previously reported BovHepV strains.In addition,genetic analysis identified five critical nucleotide sites in 5'UTR to distinguish different subtypes,which was further verified by genomic sequencing and nucleotide similarity analysis.All the 49 Chinese field BovHepV strains were classified into subtype G and this subtype is only determined in cattle in China currently.This study will provide insights for us to better understand the epidemiology and genetic diversity of BovHepV.