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Objective To investigate the prevalence of hypertension in high temperature,noise operators and related factors.Methods A total of 1 263 workers from a steel enterprise were selected,among them,583 operators contacting with high temperature and noise served as the group A,267 operators only contacting with noise as the group B,249 operators only contacting with high temperature as the group C and 164 operators without contacting with high temperature and noise as group D.The prevalence of hypertension and related factors were analyzed.Results In the analysis of hypertension prevalence rate,the group D (12.8％) ＜ group C (25.7％)＜ group B (34.6％)＜group A(43.9％).In the analysis of blood pressure(systolic pressure/diastolic pressure),the group D[(115.8± 11.5)/(73.6±5.4) mm Hg]＜ group C[(124.1±10.7)/(81.9±7.3) mm Hg]＜ group B[(132.9±11.3)/(86.7±5.2) rnm Hg]＜ group A [(143.7 ± 12.8)/(92.4 ± 6.5) mm Hg].The onset age of hypertension in the group A was earlier than that in the group B,C,D (P＜0.05).The lower educational level,the more working years,the bigger body mass index(BMI),themore smoking and drinking were,the higher the hypertension prevalence rate was.Hypertension had significantly negative correlation with the educational level and significantly positive correlation with age,working years,BMI,smoking and drinking (P＜ 0.05).Conclusion The prevalence of hypertension in high temperature and noise operators is related to personal constitution and living habits.
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Objective To evaluate the relationship between serum levels of leptin, endothelin and diabetic retinopathy in type 2 diabetes patients. Methods Leptin, endothelia, FBG, PBG, HBA1C, CHOL, TG and other clinical characteristics were tested in 80 type2 diabetes patients and 30 control case. All diabetes patients were divided into three group: non-diabetic retinopathy (NDR), non-proliferative diabetic retinopathy (NPDR) and proliferative diabetic retinopathy(PDR) according to the examination results of fundus. Correlations between levels of serum leptin and other parameters were analyzed. Results Plasma level of leptin in the type 2 diabetes with PDR group[(17.41±5.81)μg/L] were higher than that in control, NPDR and NDR group (P＜0.01). Plasma level of ET in the type 2 diabetes with PDR group[(80.68±13.57)mg/L] were higher than that in control, NPDR and NDR group (P＜0.01). The serum leptin levels were positively correlated with BMI(r＝0.468,P＜0.01). Conclusions Serum leptin and endothelin levels were elevated in patient with diabetic retinopathy as diabetic retinopathy aggravated and serum level of leptin and endothelin raised.
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Objective To observe the anti-androgenic activity of two pyrethroids (cypermethrin and fenpropathrin) in vivo. Methods SD rats aged 6 weeks were castrated ,and then housed for one week. The rats were randomly divided into groups, six in each: negative control group,cypermethrin and fenpropathrin group, positive control group. The rats were subcutaneously injected with testosterone propionate (TP) 100 ?g(/kg?d)for 7 consecutive days. Peanut oil, cypermethrin [ 45, 90, 180 mg/(kg?d)], fenpropathrin[10, 20, 40 mg/ (kg?d) ], flutamide[ 20 mg(/kg?d) ] were subcutaneously injected for 7 consecutive days at the same time. The sex accessory glands and serum hormone were detected. Results Compared with the negative group, no significant differences were observed in the sex accessory glands/tissues (seminal vesicles with coagulating glands, dorsolateral prostate, the ventral prostate and levator ani muscles) and the levels of serum hormones of the pyrethroids groups. Compared with the negative group, the masses of all the sex accessory glands/tissues decreased significantly in the positive group . Compared with the negative group, the level of LH increased significantly in the positive group. Conclusion No obvious anti-androgenic effects induced by cypermethrin and fenpropathrin in castrated SD rats has been observed.
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Objective To understand the situation of benzene series compounds pollution inside some Passenger cars in Tangshan and provide data for the formulation of corresponding countermeasures for the prevention and control of the pollution. Methods One hundred and twenty-two cars used for different periods of time were selected from March, 2009 to May, 2009 and the concentrations of benzene,toluene and xylene were determined.At the same time the basic situation (car type, date of manufacture) was investigated with questionnaire. Results The disqualified rate of benzene, toluene, xylene were 14.8%(18/122), 26.2%(32/122) and 20.5%(25/122) respectively. Eighty-one cars did not meet the standard, accounting for 66.4 %(81/122). The median of benzene, toluene, xylene in the cars used within six months were 0.086, 0.900, 0.400 mg/m3 respectively. The exceeded rate of benzene, toluene, xylene inside the cars which were used for not more than six months were 28.6%(10/35), 57.1%(20/35), 60.0%(21/35) respectively. The concentrations of benzene series compounds decreased gradually later on. The concentrations of benzene inside the cars with adsorbent were lower, the concentrations of toluene inside the highgrade cars were higher and the concentrations of xylene inside the cars with leather seats was higher. Conclusion Benzene, toluene, xylene pollution inside cars has been showed in this investigation in Tangshan. The concentrations of benzene series compounds are associated with using time, adsorbent, car grade and the seat material.