Objective To explore the water quality of the product water from the centralized water supply system in Hunan, 2006. Methods The sanitary quality of the product water samples collected from 28 centralized water supply system in cities and 39 centralized water supply system in counties in Hunan, 2006, which distributed among the area of Xiangjiang River, Zishui River, Yuanjiang River and Lishui River, were determined and evaluated according to the Standards for Drinking Water Quality (GB5749—2006). Results The eligible rate of the water sample was 70.1%. Among 74 water quality indexes, 12 indexes (such as antimony,aluminum,pH value,manganese and so on) exceeded the standard limits in degrees in some centralized water supply systems. Most of the routine indices of water quality were unqualified and the reference indices were qualified. The quality of some water samples presented statistical difference in some indices (such as aluminum, sulphate, arsenic, et al) among 4 different river areas in Hunan province (P

Objective To explore the removal effects of formaldehyde from indoor air and plywood by a formaldehyde-cleaning agent. Methods (1)experiment on removal of formaldehyde in indoor air: 2 newly decorated office rooms were selected, the indoor air was treated by formaldehyde-cleaning agent in one test room, and the other was used as control. After treatment, the concentrations of formaldehyde in two office rooms were measured and compared between them. (2)experiment on the removal effects of formaldehyde in plywood. The plywood samples were selected and divided into two groups, one was treated by formaldehyde- cleaning agent as test group, the other as the control. The emisson of formaldehyde from plywood was measured and compared between two groups. Results The removal efficiencies of formaldehyde in indoor air were 82.94%, 91.43%, 95.69%, at the 24th, 48th, 72th hour after the treatment of formaldehyde-cleaning agent respectively. The formaldehyde concentration in indoor air of test room met the requirement of the national standard after 72h-treatment of formaldehyde-cleaning agent. The removal efficiencies of formaldehyde emitted from plywood were 84.71%, 90.55%, 90.96% at the 24th, 48h, 72th hour after the treatment of formaldehyde-cleaning agent respectively. The emission amount of formaldehyde from plywood met the requirement of the national standard after 24h-treatment of formaldehyde-cleaning agent. Conclusion Formaldehyde-clearning agent presented significant removal effects on formaldehyde from indoor air and plywood.

Objective To understand the sanitary quality of the blood dialysate in hospitals in Hu'nan and its influential factors. Methods Pyrogen,total count of bacteria,22 physical and chemical indexes including calcium,chloride,fluoride,zinc,sodium and other indexes in the blood dialysate samples collected from blood dialysis rooms in 99 hospitals distributed among 14 cities and states in Hu'nan were measured according to the Sanitary Standards of Drinking Water and the Sanitary Standards for Disinfection Technology. The data of analysis were evaluated based on the standards for the blood dialysate ruled by ASAIO and AAMI. The questionnaire on the status operation and maintenance of the water purification system for blood dialysate was performed simultaneously. Results The sanitary quality of the blood dialysate samples from 31 hospitals were completely accorded with the related standards with a qualified rate of 32%. The qualified rates were 44.4%,71.7%,90.9%,97.0%,99.0%,99.0%,99.0% for pyrogen,total count of bacteria,calcium,chloride,fluoride,zinc,sodium in the blood dialysate samples respectively. The blood dialysate from the water treatment system established and put into production during 2000-2003 showed higher qualified rate(45.1%)compared with that during 1995-1999(16.7%),?2=9.293,P

Objective To assess the impact of maximal fat oxidation intensity(FATmax) exercise on arterial stiffness in overweight/obesity young men.Method Thirty two overweight/obesity young men (BMI≥25 kg/m2) without the habit of doing exercises,were divided into an exercise group (n=16) and a control group (n=16) randomly.The exercise group completed a 12-week walk/run(FATmax intensity,3-5 times/week,40-60 min/time) intervention,while the control group maintained normal life style without regular exercise.The body composition,cardiopulmonary function (VO2max),C reactive proteins (CRP) and blood hemodynamic were measured,and the brachial-ankle pulse wave velocity(baPWV) was observed to assess the arterial stiffness before and after the 12-week intervention.Results Significant decrease was observed in the average weight,body mass index,body fat mass,body fat percentage,baPWV,CRP,platelet/lymphocyte ratio (PLR) and neutrophil/lymphocyte ratio (NLR) (P＜0.05),while significant increase was found in the average VO2max and HDL-C(P＜0.05) after the training.After the intervention,the change in baPWV(△) was positively associated with △ CRP(r=0.604),△ NLR(r=0.535) and △ WBC (white blood count) (r=0.406) (P＜0.05,n=32),but negatively correlated with △ VO2max (r=-0.660,P＜0.05,n=32).Conclusion FATmax intensity aerobic exercise is effective to downregulate the inflammation,and improve aerobic fitness and vascular function.However,the potential mechanism of arterial stiffness improvement following exercise needs further study.