Allyamine or sodium vinyl sulfate was added into the solutions of acrylamide and N,N′-methylenebisacrylamide to make mixed monomer solutions. These solutions were respectively introduced in methacrylsiloxane-modifidied capillaries. In situ polymerization was initiated by thermally induced radicals. A polymer layer was chemically bonded to the inner wall, resulting in valently modified capillary columns. By altering the addition amounts of allyamine or sodium vinyl sulfate, differently charged polymeric layers were obtained. Five columns were prepared. The result indicated that columns modified with polymers containing amino groups were advantageous over those containing sulphonic acid groups or none. Further comparison revealed that the columns modified with a solution containing 0.15 mol/L acrylamide, 0.03 mol/L N,N′-methylenebisacrylamide and more than 1 mol/L allylamine exhibited good resolution. It is convenient to adjust electroosmotic flows(EOFs) in the columns by this way. In the meantime unspecific protein adsorption was efficiently depressed. When subjected) to zone electrophoresis of proteins from chicken egg white, the column showed high resolution and good reproducibility.

Objective:To investigate the behavior of tobacco use among migrants in construction sites and explore the associated factors .Methods: A total of 652 migrants in 10 construction sites were selected in Xi’ an and Tongchuan .Chi-square and logistic regression were used to analyze the influencing factors of tobacco use.Results:The average age of the migrants in the construction site was (38.23 ± 10.61), and males occupied 82.7%(535/647) of the total.The current smoking rate of the migrants was 55.8%(364/652), with 64.3%(344/535) in males and 14.3%(16/112) in females.82.5%(329/399) smokers wanted to quit smoke , however only 52.7%(210/399) had tried quitting smoking in action, and 8.8%(35/399) quitted smoking successfully .Multivariable regression indicated that the migrants who were at lower age , and sick within 2 weeks, had perceived not difficult to stop smoking and who disagree with the benefits of smoking were more likely to try to quit smoking .Conclusion:Migrants in construction sites show their characteristics of old age , low level of health literacy , male-domination , high smoking rate and high intention of quitting smoking .Tobacco control projects should be implemented in construction sites to promote the translation of smoking quitting intention into action .

Objective To explore clinical characteristics of severe pre-eclampsia and eclampsia complicated with reversible posterior leukoencephalopathy syndrome(RPLS).Methods Clinical data of 31 cases of severe pre-eclampsia and eclampsia complicated with RPLS were studied retrospectively.ResulIs These 31 cases with RPLS accounted for 48% of those with eclampsia,.and all presented with hypertension,headache and disturbalice of vision,24 cases with seizure episodes,19 cases with nausea and vomiting and 13 with continuous dysphoria after seizure.Neuroradiologic findings showed edema predominantly in the bilateral posterior cerebral white matter,especially in occipital-parietal lobe,with low density lesions in CT and long T1 and T2 signals in brain MRI. Conclusions Severe pre-eclampsia and eclampsia tended to complicate with RPLS,presenting severe hypertension,headache,disturbance of vision and recurrent seizure as major clinical manifestations.

Child ; Cryptococcosis ; diagnosis ; therapy ; Humans ; Lung Diseases, Fungal ; diagnosis ; therapy

Objective: To explore the effects of Polygonatum odoratum on body based on metabonomics. Methods: The ultra performance liquid chromatography coupled with mass spectrometry (UPLC-MS) and principle component analysis(PCA) and orthogonal partial least squares discriminant analysis(OPLS-DA) were used to evaluate the changes of endogenous substances in rats after intragastric administration of Polygonatum odoratum. Results: Significant differences between the control group and administration group were observed in PCA and OPLS-DA model. Five potential biomarkers between control group and administration group were identified. The relative content of Alpha-Tocotrienol, PC(14:1(9Z)/14:1(9Z)), Stearic acid, Theasapogenol A, Docosahexaenoic acid increased. Conclusion: The biomarkers had many beneficial activities, so the Mongolian medicine Polygonatum odoratum had the function of health care. Key words: Mongolian drug; Polygonatum odoratum; Biomarkers; UPLC-MS

Objective To evaluate the effect of N- acetylcysteine(NAC) on lipopolysaccharide (LPS) - sensitized neonatal rats with hypoxic- ischemic brain damage(HIBD) and possible mechanism except the antioxidant. Methods With the total number of 98 Wistar pups at postnatal day 8 of either sex was used in this study. There were 86 pups which were divided into three groups to evaluate the brain injury:vehicle group ( n = 29) ,low dose (25 mg/kg) ( n = 31 ) and high dose NAC (200 mg/kg) ( n - 26) treatment group. The pups were injected with LPS(0.1 mg/kg)intraperitoneally 3 days before hypoxic- ischemic(HI) insult. Multiple dose of NAC (25 mg/kg or 200 mg/kg) or vehicle was injected intraperitoneally before and after HI. Brain injury was evaluated 7 days after HI. For the Caspase - 3 activity and immunoblotting analysis, the samples were collected at 24 h after HI treated either with vehicle or high dose NAC ( n = 6 per group). Results The brain injury volume was significantly reduced by high dose NAC (200 mg/kg) treatment compared with that of vehicle (77% reduction, P ＜ 0.001 ). The tissue loss was reduced 67 % ( P ＜ 0.001 ) in high dose NAC treated group compared with that of vehicle. However,there was no significant reduction of brain injury in the low dose NAC treatment group compared with vehicle group. Caspase - 3 like activity measurement showed that the activity decreased 53 % after high dose NAC treatment ( P ＜ 0. 001 ) compared with that of vehicle treatment. The immunoblots showed that the active form of Caspase - 3, 17 kDa band, was abolished by the high dose NAC treatment. Conclusions NAC treatment attenuate LPS - sensitized neonatal HI brain injury is dose dependent. The neuroprotective effect involves Caspase - 3 inhibition.

Objective To evaluate the value of creatine kinase MB(CK-MB) and cardiac troponin I(cTnI)to earlier diagnosis on myocardial injury in newborn infants with asphyxial.Methods Dynamic variation of serum CK-MB and cTnI levels were measured at birth 1,5 and 10 days,respectively,in 40 asphyxia newborn infants and 20 control neonates.Results Serum CK-MB and cTnI levels of asphyxia neonates were significantly higher than those in control group(P0.05).Conclusion The determination of CK-MB and cTnI levels can help the prediction of myocardial injury after asphyxia.

Objective To explore the clinical values of applying contact-mode argon plasma coagulation (APC) for retroflex colonoscopic treatment of ultra-lower rectal polyps. Methods 46 wide outsole and applanate polyps smaller than 1.0 cm located at ultra-lower rectum in 17 cases of patients were treated by contact-mode APC under U-type retroflex colonoscopy after failure in regular colonoscopic treatment. Then observe the contacting rate of APC probe with polyps, success rate of curing polyps, rate of probe being adhered and blocked by the solidification structures, incidence of submucosal emphysemas, and incidence of colonoscope ambustion. Results Under U-type retroflex colonoscopy, the probe could contact with polyps in 17 patients. The polyps in every patient were cured by APC in the first time of colonoscopic treatment, whereas all 46 polyps were cured by 97 times of APC spurt. Mild adhesions occurred between the probe and solidification structures at 5 times (5.15 %) among 97 times of APC spurt, without injuries to the coagulation surface from which when the probe separated. The solidification structures blocked the probe only twice (2.06 %). When the solidification structures were cleared, efficiency of the probe restored. No sub-mucosal emphysemas and colonoscope ambustion happened. Conclusion Applying contact-mode APC for retroflex colonoscopic treatment of ultra-lower rectal polyps is safe and effective, it can prevent the damage of colonoscope from the argon knife.

OBJECTIVETo investigate the resistant effect of houttuyfonate sodium (SH) combined with imipenem (IMP) against Pseudomonas aeruginosa (Pa) biofilms.

METHODThe two-fold dilution method was used to examine the minimum inhibitory concentration (MIC) of the tested drug. The crystal violet staining was applied to detect the effect of the combination of 1/2MIC, 1MIC, 2MIC of SH, single IMP, 1/2MIC of SH and IMP of various concentrations on the clearance rate of adherent bacteria, growth of biofilms and alginate production. Fluorescein diacetate (FDA)-propidium iodide (PI) doubling staining assay was employed to observe the bacterial viability and morphological changes after membrane dispersion of each drug group.

RESULTSodium houttuyfonate could enhance the effect of IMP against pseudomonas aeruginosa biofilms. Particularly, the combination group with the concentration of 2MIC showed the highest effect, with P < 0.001 compared with the negative control group. The above results were proved by the bacterial viability and biofilm morphology under fluorescence microscope.

CONCLUSIONAfter being combined with imipenem, sodium houttuyfonate shows a higher effect against biofilms. It is expected that the combination of the two drugs could improve the clinical efficacy of associated infections.

Alkanes ; pharmacology ; Biofilms ; drug effects ; growth & development ; Drug Synergism ; Imipenem ; pharmacology ; Microbial Sensitivity Tests ; Microbial Viability ; drug effects ; Pseudomonas aeruginosa ; drug effects ; physiology ; Sulfites ; pharmacology

Objective To analyze clinical management and outcomes of perinatal fetuses born in triplet and multiple pregnancy.Methods Data of clinical management and outcomes of 55 perinatal fetuses born during 1996 to 2005 by women with triplet and multiple pregnancy were analyzed retrospectively.Results Antenatal check-up was performed regularly for 1/6 of those pregnant women during 1996 to 2000,as compared to that of 8/11 during 2001 to 2005(P<0.05).No significant difference in incidence of varied obstetric complications was found between those during 1996 to 2000 and during 2001 to 2005.Average gestational week at birth was(32.7±2.8)and(35.1±1.9)weeks(P<0.05),and averagebirth weight was(1561±471)grams and(1987±453)grams(P<0.01),respectively for them during 1996 to 2000 and during 2001 to 2005.Caesarean section was performed more for the pregnant women in the earlier first five years than in the later five years,but not reaching statistical significance.Incidence of neonatal complications significantly decreased in the later five years than that in the earlier five yeats,including hyaline membrane disease,neonatal asphyxia,infectious diseases,intracranial hemorrhage and pulmonary hemorrhage(P<0.05),but difference in incidence of apnea and low body temperature between the earlier and later five years did not reach statistical significance.Perinantal mortality was 8 in 35 births in the later five years,as compared to that of 12 in 20 births in earlier five years(P<0.01).Conclusions Outcomes of perinatal fetuses in triplet and multiple pregnancy can be improved by combined action of obstetricians and pediatricians,including regular antenatal examination,active prevention and treatment for pregnant complications and preterm infant diseases,earlier admission waiting for delivery to prolong gestational weeks and increase birth weight,and applying antenatal dexamethasone therapy.