[Objective] To explore the status of chlorite pollution in drinking water due to chlorine dioxide , aswell as its causes and counter measures. [Methods]A water plant collecting surface water as raw water slightly pol-luted by organic compounds and B water plant collecting ground water without organic compounds pollution wereselected as observed objectives. Chlorine dioxide generators were used in both of A and B water plants, their rawmaterials was chlorite for A plant and chlorate for B plant. The levels of chlorite in treated water from these twowater plants were determined by amperometric titration. [Results]The levels of chlorite in treated water of A waterplant ranged 0.530～0.760 mg/L, 2.6～3.8 times of the standard value, with a over standard rate of 100％, thelevels of B water plant range 0.257～0.733 mg/L, 1.3～3.7 times of the standard value, with a over standard rateof 83.3％. [Conclusion] The treated water of A and B water plants presented higher pollution by chlorite, the by-product of chlorine dioxide disinfection.

Protease-activated receptor-2 (PAR-2) belongs to the receptor family which is coupled with G-protein. The N-terminus of PAR-2 is cleaved by some proteases to generate a new N-terminus. The new N-terminus can interact with and activate the receptor itself. The update research reported that PAR-2 could be expressed on some cancers as well as tumor cell lines. There are some relationships between the PAR-2 expression and the behaviors of tumor cell, such as proliferation, angiogenesis, migration and invasion.

Objective To discuss the clinical application of preoperative transcatheter arterial chemoembolization (TACE) in treating squamous cell carcinoma of tongue. Methods A total of 26 patients with pathologically proved squamous cell carcinoma of tongue were enrolled in this study. Using Seldinger technique, lingual artery angiography and TACE were carried out in all patients. Radical resection of tongue cancer was performed in 2-3 weeks after TACE. Results Super-selective catheterization and TACE was successfully accomplished in all patients. After TACE the tumor size was significantly decreased in all patients. During the operation, clear lesion's border was observed, and the amount of blood loss was less than usual. Conclusion For the treatment of squamous cell carcinoma of tongue, preoperative superselective TACE is safe and effective;it can increase the opportunity of surgical resection, reduce the surgical damage, and improve the quality of life as well as the survival rate.

Objective To study the changes and clinical significance of P selectin (CD 62P), lysosome protein (CD 63) expression in patients with ischemic stroke.Methods 168 cases of acute ischemic stroke (both acute and convalescence) and 40 normal controls were tested for CD 62P and CD 63 expression using flow cytometry. The correlation between the expression and neurological functional deficit scale was analyzed.Results (1) The expression of CD 62p and CD 63 in acute phase (9.48%, 8.36%) of ischemic stroke was markedly higher than that in convalescence phase (5.73%, 4.21%)( P0.05). (3) CD 62P and CD 63 expressions were positively related with the scores of neurological functional deficit scale( r=0.84 and r=0.817, P

Botulinum neurotoxin(BoNT) is the most lethal biotoxin known to mankind. It inhibits acetylcholinerelease from the cholinergic nerve ending by cleavage of SNARE proteins, followed by neuromuscular blockadeand paralysis. Gangliosides are considered to act as a first receptor of BoNT with low affinity.Then the membranebound gangliosides-BoNT complex moves laterally to reach and bind the toxin specific protein receptor,synaptotagmin, with a high affinity constant. At last the gangliosides-BoNT-synaptotagmin complex undergoesreceptor-mediated endocytosis. This double-receptors theory is widely accepted. The research data are summarizedand reviewed.

Objective To study the surgical treatment and the related risk factors of cholangioenterostomy anastomotic stenosis.Methods We retrospectively analysed the clinical data of 41 patients who underwent surgical treatment for cholangioenterostomy anastomotic stenosis in the PLA General Hospital from January 1,2008 to November 30,2014.Results All patients' clinical symptoms were alleviated and they were discharged home.No one died perioperatively.Anastomotic restenosis happened in 5 patients.Conclusions Reoperation for cholangioenterostomy anastomotic stenosis was difficult.The surgeon should make the anastomosis as large as possible to decrease the risk of restenosis.A T tube should be used when necessary.

Objective To explore the clinical effect of mifepristone combined with misoprostol for termina-tion of pregnancy in high risk pregnant women and provide reference for clinical treatment.Methods 182 cases of high -risk maternal were divided into observation group and control group by the random number table method,each group 91 cases.The control group was treated with conventional abortion termination of pregnancy,the observation group was treated with the artificial abortion before oral administration of mifepristone tablets and misoprostol tablets. The operation time,the amount of blood loss,the degree of pain,the degree of cervical softening and the occurrence of complications of induced abortion were compared between the two groups.Results The operation time of the observa-tion group was (2.21 ±1.41)min,intraoperative bleeding was (15.29 ±4.06)mL,which were significantly less than those of the control group (t =7.122,8.256,all P <0.05);The pain degree grade I in the observation group was 58.24%,which was significantly higher than that in the control group,grade III accounted for 5.49%,which was sig-nificantly lower than the that in the control group (χ2 =44.887,44.121,all P <0.05),the observation group of cer-vical softening full was 59 cases,full softening rate was 64.84% and the control group in the cervical softening full was 41 cases,softening full rate was 45.05%.Fully softening rate in the observation group was significantly higher than that in the control group (χ2 =7.191,8.411,P <0.05),the control group,the incidence of uterine perforation in 2 cases,the occurrence of artificial abortion syndrome 7 cases,the incidence of complications for 9.89%,the obser-vation group had no uterine perforation occurred,1 case of artificial abortion syndrome and complications occurred rate was 1.10%.The incidence of complications in the observation group was significantly lower than that in the control group (χ2 =6.772,P <0.05).Conclusion Mifepristone combined with misoprostol for high -risk maternal termi-nation of pregnancy could significantly shorten the artificial abortion operation time,reduce intraoperative blood loss, reduce the patient pain,reduce the incidence of complications.

Hypothermia has been considered to be detrimental to myocardial protection. In order to evaluate warm blood cardioplegia effects, following CPB, 12 adult mongrel dogs were randomly allocated to be continuously perfused through aortic root with oxygenated warm blood cardioplegia (37 C) (group W, n=6)or cold blood cardioplegia (4C)(group C,n=6)indivadually. The coronary blood samples were taken before coronary perfusion(CP), 60mins and 90mins following CP,to measure the serum activities of lactate dehydrogenase (LDH),creatine phosphokinase (CPK)and glutamic-oxaloacetic transaminase (GOT)and the level of malondialdehyde (MDA). As compared with those before CP,the activities of LDH and CPK increased significantly only at 90th min following CP in group W,and at 60th and 90th min during CP in group C(P0.05) but went up markedly in group C following CP(P0.05) but rose dramatically in group C (P

OBJECTIVE: To study the endosomatic pharmacokinetics and bioequiavailability of kushenin tablets in health adults. METHODS: The blood concentrations of the blood samples taken from 22 healthy volunteers were determined by HPLC-MS after a single oral 0.3g kushenin (either tablet or capsule) dose and pretreatment with the internal standard (cimetidine) with m/z 265 (kushenin) taken as the detection ions and m/z 253 as the internal standard. RESULTS: The main pharmacokinetic parameters of the tablet and capsule of kushenin were as follows: t1/2 stood at (2.30?1.09)h and (1.90?0.58) h, respectively; tmax stood at (1.86?0.74)h and (1.68?0.55) h, respectively; Cmax stood at (525.09?208.94)ng/ml and (530.32?202.04) ng/ml, respectively; AUC0～11 stood at(2 048.5?749.4)(ng?h)/ml and (2 042.0?743.0)(ng?h)/ml, respectively;AUC0～∞ stood at(2 163.2?783.1)(ng?h)/ml and (2 136.4?792.1)(ng?h)/ml, respectively. The relative bioavailability of the kushenin tablet stood at (101.06?9.41) %. CONCLUSION:The tablet and capsule of kushenin were bioequiva_lent.