Objective In order to evaluate the quality and performance of chlorine dioxide disinfectant,it is necessary to develop a set of methods to determine the components in chlorine dioxide disinfectant.Methods Iodometry,malonic acid iodometry,improved malonic acid iodometry and five-step iodometry were employed to determine the components including ClO_2, Cl_2,ClO_2~-,and ClO_3~-in chlorine dioxide disinfectant,the advantages and disadvantages of the test methods were compared.Results Using iodometry,the liquid stabilized chlorine dioxide products activated by hydrochloric acid,the content of ClO_2 was 20.23 mg/ml that was accord with the content which was marked in the product label.Using malonic acid iodometriy,the liquid stabilized chlorine dioxide contents of ClO_2 was 19.99 mg/ml,Cl_2 was 0.35 mg/ml,in which a little chlorine was detected.Using improved malonate iodometry and five-step iodometry,the activation rates of the liquid stabilized chlorine dioxide products were 88.0% and 75.6% respectively,ClO_2 and ClO_2~-in the liquid stabilized chlorine dioxide products could be distinguished.Conclusion Active chlorine dioxide and residual ClO_2~-can be detected by using iodometriy and improved malonic acid iodometry,but iodometriy and malonic acid iodometry can not.

Objective To observe the analgesic and sedative effects of dezocine injection on the medical thoracoscopy check -up.Methods 98 cases of patients with unexplained pleural effusion were randomly divided into sedation group(dezocine group,49 cases)and anesthesia group(local anesthesia by lidocaine,49 cases)by adopting digital expression method.Sedation group was intravenously injected with 5mg dezocine before the operation,and another 5mg dezocine was mixed with 100mL of 0.9% sodium chloride for intravenous drip,with 10mL of 2%lidocaine for local anesthesia during the operation;anesthesia group was only administered with 10mL of 2% lidocaine for local anesthesia.Verbal rating scales(VRS)results and visual analogue scales(VAS)results of the two group patients,as well as their hemodynamics and pleural reaction were recorded.Results The VAS scores of the sedation group and anesthesia group were (4.3 ±2.2)points and (2.1 ±1.9)points,respectively,VRS scores were (3.5 ± 1.1)points and (1.4 ±1.1 )points,there were statistically significant differences(t =0.415,P =0.019 and t =0.293,P =0.006,respectively).The two groups had basically similar operation duration,but the sedation group had more stable hemodynamic indexes such as maximum heart rate,systolic pressure,diastolic pressure and pleural reaction,including cough,dizziness,chest tightness,sweating,etc.Conclusion Dezocine injection can be used in medical thoracoscopy check -up and treatment,with significant analgesic effect and less adverse reaction,effectively alleviating the discomfort of thoracoscopy check -up,and improving patients′compliance and comfort,so as to enhance the success rate of thoracoscopy check -up.

BACKGROUND:Due to special physiological and anatomical location, stability of the spine is very complicated during thoracolumbar fractures. It is difficult to identify the stability of the spine. It should be based on their individual circumstances, to explore more effective internal fixation repair method.
OBJECTIVE:To explore the Cobb’s angle and vertebral height of patients with thoracolumbar fracture and spinal cord compression treated with posterior laminectomy and screw fixation, and compared with anterior laminectomy.
METHODS:One hundred patients with thoracolumbar fracture and spinal cord compression, who were treated in the Panyu District Central Hospital from January 2013 to November 2014, were enroled in this study. The patients were equaly and randomly divided into posterior laminectomy fixation group and anterior laminectomy fixation group. Tactile and sports of American Spinal Injury Association scores, Cobb’s angle and vertebral height were assessed before treatment and 1 month after treatment, and fixation effects were compared between the twogroups.
RESULTS AND CONCLUSION:(1) No significant difference in each index was detected between the two groups preoperatively (P> 0.05). (2) Tactile and sports of American Spinal Injury Association scores, Cobb’s angle and vertebral height were better in the posterior laminectomy fixation group than in the anterior laminectomy fixation group at 1 month postoperatively (P< 0.05). (3) These findings indicated that compared with the anterior laminectomy fixation, posterior laminectomy fixation for thoracolumbar fracture combined with spinal cord compression obtained better outcomes, and could obviously relieve spinal cord compression. Posterior laminectomy fixation isasafe and effective treatment method for thoracolumbar fracture and spinal cord compression.

Anemia, Hemolytic, Autoimmune ; complications ; immunology ; pathology ; Antibodies ; immunology ; Female ; Humans ; Lymphoma, Non-Hodgkin ; etiology ; immunology ; pathology ; Male ; Middle Aged

Objective To investigate the effects of MEK1 specific inhibitor PD98059 on oxaliplatin-treated colorectal cancer cells and the potential mechanism. Methods Cell proliferation was assessed by MTT assay after transfecting MEK1 active plasmid into LoVo cells. LoVo cells were treated with oxaliplatin or PD98059, and the proliferation was assessed by MTT assay. PUMA expression and ERK activity were determined by Western blot. Apoptosis was assessed by Hoechst 33258 dye after PUMA expression was suppressed. Results Increasing activity of ERK enhanced the proliferation of LoVo cells. The activity of ERK was suppressed by oxaliplatin. PD98059 and oxaliplatin decreased the proliferation rate of LoVo cells synergistically. PUMA expression increased after PD98059 and oxaliplatin treatment. The suppression of PUMA expression by stably transfecting PUMA anti-sense vector decreased apoptosis induced by oxaliplatin and PD98059. Conclusion PD98059 enhances the effects of oxaliplatin on colorectal cancer cells mediated by PUMA expression.

Objective:To explore the histogenesis and differentiation of dermatofibroma (DF) and dermatofibrosarcoma protuberans (DFSP). Methods: Clinical information and microscopic characteristics of 26 cases of DF and 26 cases of DFSP were investigated. The immunohistochemical study was performed on microarray sections by a panel of antibodies including FactorⅩⅢa, HLA-DR, CD34, CD14, S-100, MSA, and Ki67. Probe was labeled by in vitro transcription. The mRNA expression levels of TGF-? and bFGF were investigated by in situ hybridization. Results: All cases showed positive for Factor ⅩⅢa,HLA-DR and CD34 to different extent. The medians of positive rates in DF were FactorⅩⅢa 90%, HLA-DR 70%, and CD34 5%, and in DFSP were FactorⅩⅢa 10%, HLA-DR 5%, and CD34 80%. CD14 was positive in 3 cases of DF and 1 case of DFSP. S-100 was positive in 6 cases of DFSP and 2 cases of DF. MSA was positive in 5 cases of DFSP and 3 cases of DF. In all cases, positive rate of Ki67 was less than 5%. The mRNA expression levels of TGF-? was elevated in DF in comparison with DFSP. Conclusion: Both DF and DFSP can differentiate to dendritic cells (DC) in different degree. Considering the character of microscopic features and immunohistochemical phenotype, cells of DF are much similar to mature DC, while those of DFSP much similar to immature dermal reserve cell (DRC). The differences of cell differentiation between DF and DFSP result in different prognosis. DF is a benign tumor, while DFSP a low grade malignant tumor. The different expression of FactorⅩⅢa and CD34 may be helpful to differential diagnosis of DF and DFSP.

Astragalus polysaccharide has been widely used in food and medicinal industry owing to its health-promoting properties. In order to characterize better the relationship among molecular weight, structure-activity and activities, a simple method was used different concentration of ethanol including 30% (PW30), 50% (PW50), 70% (PW70), 75% (PW75), 80% (PW80) and 90% (PW90) to precipitate Astragalus polysaccharides into different molecular weight. As a result, PW90 showed smooth surface and the strongest antioxidant activity among these six fractions (P < 0.05). In conclusion, graded ethanol precipitation was a simple method to separate Astragalus polysaccharides into different molecular weight with different antioxidant activity fractions.
Antioxidants ; pharmacology ; Astragalus Plant ; chemistry ; Chemical Precipitation ; Ethanol ; chemistry ; Polysaccharides ; chemistry ; pharmacology

OBJECTIVETo observe the effects of electroacupuncture (EA) on circadian rhythm of temperature and melatonin (MT) in depression rats model induced by chronic stress, so as to explore the biological mechanism of EA for depression.

METHODSTwenty-four SD rats were randomly divided into a control group, a model group and an EA group, 8 cases in each one. Rats in the control group were treated with normal diet for 21 days without any treatment. In the model and EA group, rat model was established by chronic unpredictable stress combined with solitarily feeding method, and rats in the EA group was treated with EA at "Baihui" (GV 20), "Yintang" (GV 29) 1 h before stress stimulation everyday, 2 Hz in frequency and intensity was favorable with the head of rat slightly shivering. The needles were retained for 20 min, once a day for totally 21 days. After EA treatment, open-field experiment was adopted to observe the behavioral improvement; the rats temperatures were monitored at six time points (2:00, 6:00, 10:00, 14:00, 18:00, 22:00) and orbital blood sampling was collected. The level of serum MT was tested by enzyme linked immunosorbent assay. The circadian rhythm changes of temperature and serum MT in each group were compared.

RESULTSThe numbers of horizontal movement and vertical movement in the model group were obviously lower than those in the control group (both P < 0.05), while those in the EA group were significantly improved compared with those in the model group (both P < 0.01). The circadian rhythm of temperature and MT disappeared in the model group, which was improved into normal level after EA treatment.

CONCLUSIONThe electroacupuncture has regulation effects on circadian rhythm of temperature and melatonin in depression rat model induced by chronic stress.

Animals ; Circadian Rhythm ; Depression ; metabolism ; physiopathology ; therapy ; Electroacupuncture ; Humans ; Male ; Melatonin ; metabolism ; Rats ; Rats, Sprague-Dawley

Objective To study the relationship of clinical manifestation and pathological changes and prognosis in Henoch-Schonlein purpura nephritis(HSPN)in children.Methods Clinical and pathological characteristics of 42 children with HSPN were analysed.Among them,40 children were detected of angiotensin-convertion enzyme(ACE)gene and had been followed up.Results Among them,there were 9 cases of level Ⅰof pathological types,21 cases of level Ⅱ,12 cases of level Ⅲ,but no cases of level Ⅳ.Ⅰand Ⅱ level were found in those cases of clinical manifestation with solitary hematuria and albuminuria.Pathological grades were Ⅰ,Ⅱ and Ⅲ levels in the cases of hematuria and albuminuria.Pathological types of nephrotic syndrome(NS)were Ⅱ and Ⅲ level,which were of more gross hematuria than those of other grades.ACE gene DD had serious pathological damnification.Conclusions Change of pathology cannot only be anticipated by clinical manifestation of HSPN.But if pathological damnification gets more serious,the albuminuria gets more serious.Gross hematuria and albuminuria can serve as indicators of biopsy.NS of ACE DD type have serious pathological damnification.Children with HSPN has favourable prognosis in the future.

Abstract: Objective　This paper aims to explore the effect of live attenuated varicella vaccine on the sensitivity of tuberculin skin test(TST), and to provide reference for tuberculin skin test in the future. Methods　TST and emergency varicella vaccine were administered to students in grade one of a high school in Wuxi, Jiangsu province, who had both TB and varicella cases. Independent-samples t test was used to analyze the mean diameter of induration of TST in day 0, day 83 and day 195. The retrospective cohort study was used to analyze the effect of live attenuated varicella vaccine on TST. 　　Results　The mean induration diameter of 45 students who participated in three TST tests on day 0, day 83 and day 195 were analyzed by independent sample t test. On day 0, there was a difference in the mean diameter of TST induration between the unvaccinated and vaccinated groups(1.630±2.837 vs 5.818±4.530) (t=-3.692, P=0.001). On day 83, there was no difference in the mean diameter of TST induration between the two groups(0.001±0.001 vs 0.114±0.533) (t=-1.000, P=0.329). On day 195, there was a difference in the mean diameter of TST induration between the two groups(1.913±3.774 vs 5.023±5.126) (t=-2.309, P=0.026). Moreover, the retrospective cohort study showed that the mean diameter of TST induration changed more significantly after inoculation with varicella vaccine, RR=6.071, 95%CI (1.667-22.116), P<0.05; After inoculation with varicella vaccine, the mean diameter of TST test did not change significantly from day 0 to day 195 with no statistical significance RR=3.474, 95%CI (0.333-36.240), P>0.05. Conclusions　Live attenuated varicella vaccine may temporarily affect the sensitivity of tuberculin skin test.