Object To develop a method for the determination of flavonoids in Hypericum perforatum L processed by different drying methods to provide a basis for the processing of the natural herbs Methods The chromatographic conditions were Discovery C 18 column (5 ?m, 4.6 mm ? 25 cm). detection wavelength 365 nm; mobile phrase : water : acetonitrile : phosphoric acid (825∶175∶1); flow rate 1.0 mL/min Results The contents of rutin and hyperin were at their maximum when dried at 60 ℃ for 4 h Rutin had a good linearity in the range of 0.107～2 675 ?g, average recovery rate 99 32%, RSD 1 007%, and hyperin in the range of 0 107～2 675 ?g, average recovery rate 99 54%, RSD 3 591% Conclusion Temperature is the main factor influencing the content of flavonoids The HPLC determination was shown to be rapid, reliable and simple, and may be used for the quality control of H perforatum

A fungus CQ31 isolated from soil samples was identified as Chaetomium sp.. This strain produced effectively xylanases utilizing several liguocellulosic materials in the solid-state fermentation (SSF), and corn straw was the best carbon source. The results of single-factor-experiment showed that the corn straw as the carbon source, tryptone as the nitrogen source, initial moisture content of 80% and initial pH 9.0 were the optimal conditions for xylanase production. Under the optimized conditions, it produced xylanase which was 4897 U/g dry substrate while mannanase was 803 U/g dry substrate after 7 days of cultivation. Therefore, xylanase and mannanase production by Chaetomium sp. CQ31 in SSF possess potential for commercial applications.

AIM: To research the protective effects of crocetin on cerebral ischemia-reperfusion(CIR) injury in mice.METHODS: The effects of crocetin on brain edema,brain capillary permeability,the activities of lactate dehydrogenase(LDH),superoxide dismutase(SOD),glutathione peroxidase(GSH-Px) in brains and the contents of malondialdehyde(MDA) and nitric oxide(NO) in CIR model mice were observed.RESULTS: Compared with the CIR group,crocetin(50,100 mg/kg i.g.for 5 d) decreased the content of water,Evans blue,MDA and NO in mice brain tissue,and increased LDH、SOD and GSH-Px activity in brains of CIR mice,with statistical significance.CONCLUSION: Crocetin has protective effects on cerebral ischemia-reperfusion injury in mice,the mechanism may be related to its anti-oxidative activity and inhibition of NO overproduction.

AIM To observe the effect of Yishenjiangzhuo decoction on the NE,5-HT contents of hippocampus in cerebral ischemia reperfusion rats. METHODS High pressure lipuid chromatography-electrochemical process was used to measure the NE and 5-HT contents on the d 1, d 7 and d 15 after cerebral ischemia reperfusion by common carotid artery occlusion. RESULTS The NE contents of hippocampus were respectively 364.25?66.47, 349.76?59.38, (344.59?70.31) ?g?g -1 and the 5-HT contents were respectively 646.72?83.33,629.11?90.64,(596.68?99.47) ?g?g -1 on the d 1, d 7 and d 15 in the model group, which significantly decreased compared with the control group( P

Continuous exposure to conventional glucose-containing lactate-buffered solutions will ultimately lead to irreversible changes of the structure and function of peritoneum.Therefore,the development of novel peritoneal dialysis(PD) solutions has become the focus in the PD fields in recent years.Icodextrin,which has more adventages than conventional PD solutions,is one of the most important advancements in the past decade.Icodextrin has better biocompatibility,and can reduce the absorption of carbohydrates to decrease the metabolic complications in PD patients.Apart from increasing ultrafiltration,icodextrin can also improve the fluid status and protect the residual renal function of PD patients.However,adverse consequences may result from the pseudo-hyperglycaemia caused by limited measurement of serum glucose.This article reviews the features and applications of the new PD solutions—icodextrin solutions.

AIM: To determine the optimal operation method and reduce operative complications by retrospective analysis of outcomes of different operative manipulation for patients with congenital ectopia lentis ( CEL) .
●METHODS: A retrospective study ranged from Jan. 1, 2010 to Jan. 1, 2015 was conducted and 31 CEL patients (57 eyes) treated with different operations were taken into this study. The postoperative outcome, operation related complications was analyzed in terms of different operative manipulations.
● RESULTS: The most common types of CEL are idiopathic and Marfan - related CEL. All eyes ( 98%) benefited from operation except 1 Marchesani syndrome eye concurrent with optic atrophy induced by glaucoma. A total of 3 eyes ( 5%) were treated by phacoemulsification combined with intraocular lens implantation; 8 eyes ( 14%) were treated by phacoemulsification, capsular tension ring implantation combined with intraocular lens implantation, among these 8 eyes, 1 eye was treated with capsular tension ring implantation combined with suture fixation; 39 eyes ( 68%) were treated by lens excision and anterior vitrectomy through corneal incision combined with intraocular lens implantation with suture fixation, among these 39 eyes, 2 eyes were treated with trabeculectomy , but not combined with intraocular lens implantation; 5 eyes ( 9%) were treated by intracapsular cataract extraction and anterior vitrectomy combined with intraocular lens implantation with suture fixation; 2 eyes ( 4%) were treated by lens excision and vitrectomy through pars plana combined with silicon oil injection.
● CONCLUSION: Almost all patients can obtain satisfactory outcomes through various operative manipulations. Phacoemulsification combined with intraocular lens implantation was the first choice for patients with lens dislocation range less than 90°. Phacoemulsification, capsular tension ring implantation combined with intraocular lens implantation was recommended for 90° - 180°, and lens excision and anterior vitrectomy through corneal incision combined with intraocular lens implantation with suture fixation was more suitable for lens dislocation range more than 180°. The appropriate operative methods for different types of CEL patients is the key to success.

Objective To study the mechanism of arachnoidal fibrosis after subarachnoid hemor- rhage. Methods Rats were divided into control group, experiment group and treatment group. Radioim- munoassay (RIA) was employed to detect the levels of hyaluronic acid, laminin,type Ⅲ precollagen and type Ⅳ collagen in the arachnoid membrane. In the meantime, arachnoid cell's morphology and collagen distribution in the subarachnoid space were investigated by electron microscope. Results Results of RIA detection showed increase of Type Ⅲ precollagen level (peak at the second week), obvious higher levels of LN and HA but insignificant change of type IV collagen after subarachnoid hemorrhage. However, dexam- ethasone treatment decreased type Ⅲ precollagen level. Electron microscope found that arachnoid cells pres- ented accentruated bioactivity after subarachnoid hemorrhage, with significant increase of arachnoidal colla- gen fibers from one week after suharachnoid hemorrhage, continuing for 3 weeks. Dexamethasone treatment resulted in low density of mitochondria and sparsed arachnoidal collagen fibers. Conclusions Extracellu- lar matrix (ECM) increases in arachnoid membrane after subarachnoid hemorrhage and participates in a- rachnoid fibrosis. Dexamethasoue can relieve arachnoidal fibrosis after subarachnoid hemorrhage, as pro- rides fresh way for prevention and treatment of post hemorrhagic hydrocephalus.

Diabetic nephropathy ( DN) is one of the most serious chronic complications of diabetes and it is the main reason leading to end-stage renal disease.Epidemiological studies have shown that genetic susceptibility is one of the important factors in the development of DN . Regions coded by exon 4 of apolipoprotein E ( ApoE ) gene involved in lipid metabolism , which is considered to be a candidate susceptible gene for diabetic nephropathy .Articles on the relationship of APOE and diabetic nephropathy including case-control study , prospective follow-up study and meta-analysis are reviewed , and the conclusion suggests that APOE E2 allele may be one of the genetic risk factors for DN , and APOE E4 allele may be a protective factor.APOE may play its role in the development of DN through the participation in the lipid metabolism, regulation of cell growth factor activity in extracellular matrix and regulating gene expression in kidney protection and other aspects .However, the detailed mechanism of APOE polymorphism in diabetic nephropathy is unclear and needs further research .

OBJECTIVE To investigate the distribution and drug resistance of pathogenic bacteria in blood culture,and provide a basis for clinical treatment.METHODS The blood samples were poured into the blood culture bottles of Beijing Botai Technique Development Center,and cultured with BacT/Alert 3D automated blood culture system.Isolated bacteria were identified by the VITEK system.Drug sensitivity was tested by the BIOMIC.RESULTS From Jan 2003 to Dec 2007,607 strains of pathogenic bacteria were isolated from 4116 clinic blood specimens,the positive rate was 14.8%,Gram-negative bacteria were the most common pathogens then Gram-positive bacteria and fungi.The sensitivity of Gram-negative bacteria to imipenem/cilastatin(TPM) was the best,the next was FEP;the sensitivity of Gram-positive bacteria to teicoplanin(TCN) was the best,Second was VAN.CONCLUSIONS Drug resistance of isolated pathogenic bacteria in blood cultures is very serious.Monitoring the change of pathogens and trends of drug resistance is very important in guiding the clinical use of drug.

The cloning and expression of a?-galactosidase gene(TM_0310)from Thermotoga maritima MSB8 was studied.The gene consists of 2019 bp,and the translated protein encodes 672 amino acids and its molecular mass is approximately 78.972 kD.The homology analysis of the deduced amino acid sequences showed that the enzyme shared 95%identity with a putative?-galactosidase from Thermotoga petrophila RKU-1 and a?-galactosidase from Thermotoga sp.RQ2.The galactosidase activity was up to 2.08 U/mg after the recombinant E.coli BL21 was induced by IPTG.The crude lysate remained about 70%activity after treated at 80℃for 10 min,indicating that the recombinant enzyme is thermostable and may be used at high temperatures.