[Plasma lipid level and incidence of dyslipidemia in workers of Chongqing enterprises and institutions].

Objective: To examine the plasma lipid level and distribution of dyslipidemia in workers of Chongqing enterprises and institutions.

Methods: By using cluster sampling method, 20 000 workers of Chongqing enterprises and institutions aged 18 to 60 were selected as target population from January to October, 2009. We conducted questionnaire survey, physical and laboratory examinations including total cholesterol (TC), triglyceride (TG), high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C).

[Influencing factors on behavior related to HIV testing among female commercial sex workers based on the Structural Equation Model].

Objective: To investigate the influencing factors on behavior related to HIV testing among female commercial sex workers under Structural Equation Model (SEM).

Methods: In Chongqing, Sichuan, Guangxi, Xinjiang provinces, 1613 female commercial sex workers were participated in a questionnaire survey. Factors on behaviors related to HIV testing among female commercial sex workers were analyzed based on SEM.

[Utility of waist-to-height ratio in detecting central obesity and related adverse cardiovascular risk among normal weight adults].

Objective: To detect central obesity and related adverse cardiovascular disease risk factors by waist-to-height ratio (WHR) among normal weight adults in Chongqing area.

Methods: A total of 20 000 participants aged 18 - 59 from one hour economic cycle of Chongqing area were selected by group sampling method. We measured the height, waist circumference (WC), body weight, blood pressure, blood lipid and blood sugar.

Kinetic substrate quantification by fitting the enzyme reaction curve to the integrated Michaelis-Menten equation.

The reliability of kinetic substrate quantification by nonlinear fitting of the enzyme reaction curve to the integrated Michaelis-Menten equation was investigated by both simulation and preliminary experimentation. For simulation, product absorptivity epsilon was 3.00 mmol(-1) L cm(-1) and K(m) was 0.