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571.
La对Pb伤害大豆幼苗的影响   总被引:15,自引:0,他引:15  
以盆载法研究了Pb对大豆幼苗的伤害及La对Pb伤害的生态生理效应.结果显示,1000mgL-1PbAc2能严重抑制大豆幼苗代谢与生长,叶面喷布30mgL-1LaCl31次,能减轻Pb造成的毒害.实验证明,此与La能增加大豆幼苗光合速率,提高叶绿素含量与硝酸还原酶活性,降低细胞质膜透性与体内Pb含量,维持TTC还原力等多种作用相关  相似文献   
572.
573.
由于我国现行工伤保险赔付机制的不完善,致使农民工在出现工伤之后由于企业没有缴费而得不到救助。为改变这种状况,现在政府推行的扩大工伤缴费覆盖面和简化工伤受理补偿的程序,固然能够取得一些成效,而配套实行先行赔付的机制,会更为便于操作和更为直接有效。这种机制的实质是,克服传统行政管理的不足,真正运用社会化的方式,实现工伤员工享受工伤补偿的普惠性,促使用人单位、政府和司法有关部门能够把工伤社会保障的责任切实承担起来。  相似文献   
574.

Background

With more than a million youth living on agricultural operations, it is important for parents to understand the consequences of bystander injuries that children experience in these environments. We identified the childhood injuries for bystander status and compared the severity of these injuries to the working children in the Regional Rural Injury Study-II (RRIS-II).

Methods

RRIS-II followed 16,546 children (∼ 85% of eligible) from rural communities in the Midwest for two six-month recall periods in 1999 and 2001. Demographic, injury, and exposure data were collected through comprehensive computer-assisted telephone interviews. Child injuries were cataloged using narrative scenarios into four categories: (a) directly work-related; (b) indirectly work-related; (c) non-working accomplice; and (d) non-working attendant; the latter three all being bystander categories. Poisson regression modeling was used to calculate rates of bystander injuries. Frequencies were used for comparison of severity measures.

Results

Among the 463 child injuries (aged < 20 yrs), 102 were bystander injuries. Of the bystander-related injuries, 14 were identified as indirectly work-related (working bystanders), 27 as non-working accomplice (passengers/tag-alongs), and 60 as non-working attendant (playing on the operation). The overall rate of bystander injuries was 6.4 per 1,000 people, 95% CI (5.0, 8.1). Males, compared with females, had more than twice the injury rate (8.7; 95% CI 6.4-11.8, and 3.9; 95% CI 2.7-5.7, per 1,000 people, respectively). Bystanders in this population had more severe injuries with 4% having life-threatening circumstances; of these, 4% of the accomplices and 2% of the attendants subsequently died.

Conclusions

Children who live or work on agricultural operations are vulnerable to many hazards. Therefore, this study examined child injuries and found a clear difference in the consequences of these injuries between working-related and bystanding-related injuries.

Impact on Industry

Unlike occupations such as construction and mining, where laws and organizations have been created for the protection of bystanders, agricultural bystanders have remained unprotected and have had to face the consequent injury and death outcomes. As public health professionals considering these risks, it is necessary that we work to develop more intervention studies and continue to propose suggestive guidelines for child safety in these environments so as to challenge family traditions and possibly spark public policies that will give further protection to this population.  相似文献   
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