Study on the health effect of the occupational stress in aircrew / 中华劳动卫生职业病杂志

Objective@#To explore the relationship between occupational stress and physiological and biochemical indexes, to research the health effect of the occupational stress in aircrew.@*Methods@#450 aircrews were conducted with the OSI-R questionnaire survey, examine the level of blood pressure, blood routine, ALT and UA.@*Results@#The concentration of HB was positively related with task conflict and entertainment and leisure (β=0.262 and 0.106, both P<0.05) , while heavy task, task discomfort and psychological stress reactions were negatively related with HB (β=-0.163, -0.102, and -0.137, all P<0.05) ; task conflict and self-care were positively related with RBC (β=0.221 and 0.159, both P<0.01) , heavy task, psychological stress reactions and social support were negatively related with RBC (β=-0.157, -0.119, and -0.113, all P<0.05) ; task ambiguity and self-care had a positive relationship with ALT (β=0.144 and 0.159, both P<0.01) while heavy task, psychological stress reactions and social support had a negative relationship with ALT (β=-0.176, -0.096, and -0.102, all P<0.05) ; self-care was positively related with SBP (β=0.170, P<0.01) , task discomfort, interpersonal stress reactions and social support were negatively related with SBP (β=-0.093, -0.103, and -0.111, all P<0.05) ; while self-care was positively related with DBP (β=0.139, P<0.01) , social support was negatively related with DBP (β=-0.114, P<0.05) .@*Conclusion@#Occupational stress of the aircrew is significantly related with blood pressure, RBC, ALT and UA, occupational stress can make effects on the health of aircrew.

Analysis of correlation between occupational stress and serum monoamine neurotransmitters in nurses / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the impact of occupational stress on serum monoamine neurotransmitters in nurses.</p><p><b>METHODS</b>A total of 131 nurses were included as study subjects by stratified cluster sampling. The occupational health information collection system (based on the Internet of things) was used to measure occupational stress. Serum levels of monoamine neurotransmitters were also measured.</p><p><b>RESULTS</b>Epinephrine (E) was negatively correlated with superior support (P < 0.05) and colleague support (P < 0.05). Negative correlation was also found between dopamine (DA) and job prospect (P < 0.05). Level of 5-hydroxytryptamine was negatively correlated with promotion opportunities (P < 0.05). Norepinephrine (NE), E, and DA were all negatively correlated with work satisfaction (P < 0.05) and positively correlated with daily stress (P < 0.01). NE and E were negatively correlated with sufficient confidence (P < 0.05) and positively correlated with physical complaints (P < 0.01). There was a negative correlation between NE and psychological satisfaction (P < 0.05).</p><p><b>CONCLUSION</b>Occupational stress in nurses is correlated with serum monoamine neurotransmitters, and it may affect serum levels of monoamine neurotransmitters to a certain extent.</p>

Effect of occupational stress on oxidation/antioxidant capacity in nurses / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the effect of occupational stress on the oxidation/antioxidant capacity in nurses.</p><p><b>METHODS</b>A total of 131 nurses were included as study subjects. The occupational health information collection system (based on the Internet of things) was used for measurement of occupational stress. Levels of hydroxyl free radicals and antioxidant enzymes were determined.</p><p><b>RESULTS</b>The serum level of superoxide dismutase (SOD) was the highest in nurses under the age of 30 and the lowest in those over 45 (P < 0.05). The serum levels of glutathione peroxidase (GSH-Px) and peroxidase (POD) were the highest in nurses of working age less than 5 years, followed by those of 5-15 years, and nurses with more than 25 years' working experience showed the lowest GSH-Px and POD levels (P < 0.05). Furthermore, nurses with a university (college) degree had a higher GSH-Px level and a lower POD level compared with those with junior and senior high school degrees (P < 0.05). Job prospects and job control were positive occupational stress factors for SOD. Job hazards were negative occupational stress factors for POD. Psychological satisfaction was negative occupational stress reaction for hydroxyl free radicals. Calmness was positive occupational stress reaction for SOD, and daily stress was a negative one. The positive occupational stress reactions for GSH-Px were psychological satisfaction and job satisfaction, and daily stress was negative reaction.</p><p><b>CONCLUSION</b>Nurses with higher occupational stress have stronger oxidation and weaker antioxidant capacity, which intensifies oxidant-antioxidant imbalance and leads to oxidative stress damage.</p>

Molluscicidal effect of 50% wettable powder of niclosamide ethanolamine salt combined with urea / 中国血吸虫病防治杂志

In order to evaluate the moUuseicidal effect of 50% wettable power of niclosamide ethanolamine salt(WPN)combined with urea against Oncomelania snails in the field,4 g/m~2 WPN,4 g/m~2 WPN+20 g/m2 urea and 4 g/m~2 WPN+30 g/m~2 urea were used for mollusciciding with the spraying method.The results showed after 7 days,the mortality rates of snail were 74.43% for 4 g/m~2 WPN,90.32% for 4 g/m~2 WPN+20 g/m~2 urea and 94.83% for 4 g/m~2 WPN+30 g/m~2 urea,respectively.It is indicated that WPN combined with urea can improve the molluscieidal effect significantly.

Effects of early postnatal exposure to m-tolyl methylcarbamate on spatial learning and memory ability of mice / 中华疾病控制杂志

Objective To observe the effects of early postnatal exposure to low-dose m-tolyl methylcarbamate(MTMC) on neurobehavior and spatial learning and memory ability in adolescent and early adult mice,and to dertermine when to affect this ability.Methods ICR mice pups randomly divided into 5 groups received intraperitoneal injections(i.p.) of different doses of MTMC(5 mg?kg-1,0.5 mg?kg-1,0.05 mg?kg-1),DMSO solution and normal saline respectively every other day during postnatal days(PND) 3～13.The general physiological condition and neural development of mice during experiment were evaluated,and a battery of tasks,i.e.hole-board test,beam walking,open field,Morris water maze(MWM),was used to assess their neurobehavior and spatial learning and memory ability in different time.Results Scores were negatively correlated to the doses of MTMC by Spearman rank correlation analysis in beam walking on PND60(rs=-0.418,P