Adult ; China ; Female ; Health Status ; Humans ; Male ; Middle Aged ; Occupational Health ; Physical Examination

The structure and characteristics of the soluble exopolysaccharide(PS-238) produced by Alcaligenes sp.NX-3 were studied.The analytic sample was prepared by ethanol precipitation then proteins were removed by the Sevag method.The components of polysaccharide were identified by TLC、 GC and chemical method after acid hydrolysis as: glucose,mannose,rhamnose and glucuronic acid.By means of IR and periodate oxidation,it showed that the polysaccharide was mainly consisting of(1→3)and(1→4) glucosidic linkages.The relation between viscosity and shear rate、concentration、temperature、pH and salts was investigated.The results showed that the solution of PS-238 is a typical pseudoplastic liquid,having high viscosity at low concentrations.The viscosity of 1%PS-238 water solution could reach 3300cp at 25℃.It has the excellent stability towards pH2~13,also has outstanding property of viscosity retention even at temperatures up to 150℃.Some kinds of salts were cooperated with PS-238 as a thickening agent.

As a kind of new technology, ethical issues are inevitable in medical and non-medical gene en-hancement application. It is unrealistic to unilaterally support or object to the research and application of medical and non -medical gene enhancement. Based on standardizing the ethical principle of gene enhancement tech-niques, we should build management measures of the research, development and application that adapted to ethi-cal, social and legal standards, so that we can draw on the advantages and avoid the disadvantages, and use gene enhancement reasonably and bring benefits to mankind and society.

Sirtuin is a type of deacetylase acted on histone. Sirtuin 1 (SIRT1) is the most homologous to the homologue of silent information regulator 2 (SIR2) in mammals. Its main function is to regulate the body energy metabolism, cell senescence and response to stress. SIRTI inhibits apoptosis through the interaction of several transcription factors involving in stress response. It is a neuroprotective gent.

Objective To get informed of the parents' oral health behaviors,children's oral hygiene habits and the correlation between the two,to lay the foundation of building up joint educational pattern of the oral health between pre-school children and their parents.Methods The questionnaire between preschool children and their parents was applied.By cluster sampling,124 pre-school children from 5 kindergartens in the local community were selected to participate the survey.The oral health behaviors of parents and their kids were investigated and the results underwent analysis.Results Parents’ oral health behaviors were closely related to children's,which was embodied by three parts,such as the starting age of brushing teeth,the duration of brushing and the habits of gargling after meals.As to parents,the knowledge sources of oral health mainly came from TV and broadcast programs (82.3％),newspapers and periodicals,magazines and popular science readings (51.6％),relatives and friends (27.4％),but the anticipated knowledge sources were from medical personnel (90.3％),TV and broadcast programs (53.2％),community activities on health education (51.6％).Conclusions Pre-school children's oral health behaviors are currently good; more emphasis should be laid on the effect of parents' behaviors to their children's oral health; it's necessary to hold more community activities on health education.

Objective: To develop a liquid chromatography-tandem mass spectrometry (LC-MS/MS) method with cation exchange-based solid phase extraction (SPE) for determination of tetrodotoxin (TTX) in salted pufferfish. Methods: Evenly crushed salted pufferfish samples were subjected to ultrasound-assisted extraction with 0.5% acetic acid/50% methanol/water. The extract was cleaned with cation exchange-based SPE cartridge and eluted with 0.3% hydrochloric acid and 50% acetonitrile/water. The eluent was neutralized with ammonia and separated with a Waters XBridgeTM BEH Amide column (150 mm×3.0 mm, 1.7 μm), and determined using LC-MS/MS in a multiple reaction monitoring mode. Results: The matrix effects of TTX were 85.7%-92.4%, and the matrix suppression effect was under effective control following clean-up procedures using the optimized SPE method. The TTX showed a good linear relationship at the range of 2.0 to 4 000 μg/kg, with a correlation coefficient (r2) of 0.999 2. The limits of detection and quantitation for TTX in sample matrix were 1.0 μg/kg and 2.0 μg/kg, respectively. The mean spiked-recovery rates were 81.2% to 96.5% at spiked amounts of 2.0, 200 μg/kg and 2 200 μg/kg, with relative standard deviations (RSDs) of 4.3% to 7.5%. The intraday accuracy and precision of TTX were 84.4% to 95.6% and 4.9% to 5.8% in quality control samples, and the interday accuracy and precision of TTX were 86.1% to 94.9% and 5.5% to 8.5% in quality control samples. The detection of TTX was 60.5% in 38 market-sold salted pufferfish products using the established LC-MS/MS method. Conclusion The established LC-MS/MS method is effective for accurate quantitative determination of TTX in salted pufferfish.

Humans ; Hypertension ; psychology ; Occupations ; Social Support

Objective: To establish a method for HPLC determination of ursolic acid in Kangzhitong Jiangzhi Capsule.Methods: HPLC,chromatographic column Kromasil C18(4.6mm?250 mm,5?m)and the mobile phase consisted of methyl alcoholwater-ammonium acetate-acetonitrile(9∶25∶0.8∶65) were used to find ursolic acid.The flow rate was 1.0ml?min and the detector wave-length was set at 215nm.Results: The calibration curve was in good linearity over the range of 64-320?g/ml(r=0.9996).The average recovery rate was 100.10%,with RSD=1.32%.Conclusion: This method is simple,accurate and reproducible so it can be used to determine the content of ursolic acid in Kangzhitong Jiangzhi Capsule.

· As a member of the stem cells family, mesenchymal stem cells ( MSCs ) have been proved to be effective on the repair of tissue injury. Although the specific mechanism is still unclear, MSCs do have a promising future in retinal disease therapy.The results of the current research are diverse.We still have an urgent and long way to explore the details of MSCs.So it’s significant for further understanding of MSCs to analyze the possible mechanism and influencing factors.

Objective: To study the diagnosis， treatm ent and outcome of infants in patients with hyperthyroidism in pregnancy. Methods: The levels of T3，T4，TSH，FT3，FT4 in 40 cases of hyperthyroid gravida and control group were measured before delivery, the r oute of delivery and the outcome of infants were studied, and the neonatal thyroid f unctions were evaluated by the levels of T3，T4，TSH in cord serum samples . Results: The levels of T3，T4，FT3，FT4 in non-treatm ent group were higher than that of treatment group and control(P<0.01); an i ncreased rate of forceps and cesarean in hyperthyroid gravida was seen compared with that in control group, about 90%(36/40); the body weights of infants in no n-treatment group were lower than that in treatment and control group. There wa s a case of neonatal hyperthyroidism in non-treatment group. Conclusion : Hyperthyroidism should be diagnosed and treated earlier and there is little side effects on the outcome of infants.