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Since risk assessment is a continually improving process, PELs may need reassessment periodically, especially after the discovery of new information. The HRA ensures that workers are well protected, taking into account the latest advances in science and technology.

根据此规范流程执行并完成六价铬健康风险评估的结果,可以提供给相关单位参考应用以制订能广为接受的容许浓度标准,随著科学进步,在新的科学证据出现以前,容许浓度仍需要重新检讨与评估,以妥善维护劳工安全卫生并提升国家经济竞争力。

Excessive grinding or abrasion of this product may create airbome dust and fober concentrations in excess of state and Federal OSHA permissible exposure limits.if employee exposures exceed these PELs,local exhanst ventilation or other mechanical ventilation systems may be required to reduce such exposures to concentrations below the PELs.if mechanical exhaust ventilation is necessary,exhaust air should be appropriately filtered or otherwise controlled to meet local ,state and Federal air pollution and air quality laws and standards

磨削过度磨损或这种产品可能造成机载尘fober浓度超过州政府和联邦政府1921年允许暴露限定。如果雇员暴露超过这些研究生,局部排气通风或其他机械通风系统,可要求减少这种暴露浓度低于该PELs。如果机械排风是必要的,排风应适当过滤或以其他方式控制,以符合当地,州和联邦空气污染和空气质量法规和标准

The concentration of monomethyihydrazine in brain increased along with perfusion time and monomethylhydrazine concentration in the perfusate.

MMH灌流浓度分别为145,290和580mgL^(-1),灌流时间为2,5,8及10min;采用对-二甲氨基苯甲醛比色法进行脑组织中的MMH浓度测定。

Second we use excitability medicine to provocat the nerve,s causality discharage,after 1 to 2 minutes,perfuse the brain slice with a certain concentration of puerarin to be abaissement,in result,we find that some kinds concentration(such as 1:1000) of puerarin have prominen depressant effect to the provocated discharage of the hippocampal nerves.

之后,通过在电活性较好的脑片上先进行兴奋性药物的诱发,待诱发性放电出现后1-2分钟再灌注一定浓度的葛根素进行实验观察,结果表明,一定浓度的葛根素(如1:1000)对海马神经元的诱发放电活动有显著的抑制作用。

Faba root tip was studied through detection of micronucleus technique Both of nitrate (0.08 mol/L) and nitrite (0.80 mmol/L) with low concn of could significantly induce the formation of micronucleus of V. faba root tip (P.01), and showed an obvious dose effect, i.e. the permillage of micronucleus was in linear increase with rising up of mutagen concn within a certain range.

结果]低浓度的硝酸盐(0.08mol/L)、亚硝酸盐(0.80mmol/L)均能显著诱发蚕豆根尖微核的形成(P.01),并呈现出明显的剂量效应,即微核千分率在一定范围内随诱变剂浓度的增加而线性增加。

The detection rate of persister on MODS and indirect absolute concentration were 49.5% and 47.8% respectively,the coincidence rate was 95.5%(kappa value: 0.91),and the detection coincidence has high concordance in different smear samples.

MODS与间接绝对浓度法的耐药株检出率分别为49.5%、47.8%,符合率为95.5%(kappa值:0.91),并且不同涂片结果样本的检测符合率有着高度的一致性,以绝对浓度法为金标准,则MODS的敏感性为97.7%,特异性为93.3%。

At that temperature. Varying concentrations of sulfate acid were tested as humidity control agents at 5-35℃, with each yielding a stable humidity in the perspex chamber regardless of temperature.

同时对不同浓度硫酸溶液控制生长箱内不同水平的湿度进行了测定和检验,亦效果良好,且对环境温度的适应性强,在5-35℃范围内同一硫酸浓度控制相同的稳定湿度。

An Ozone nowcasting model based on phase space and Support Vector Machines is represented in this paper.

本文利用臭氧浓度时间序列资料重构了该光化学系统的相空间,然后沿着系统演化的相轨道用最小二乘支持向量机建立了臭氧临近预报模式,并用上海市普陀站的臭氧观测资料做了提前1-8小时和提前24小时预报试验,结果表明这一模式能够较好地模拟臭氧浓度变化的非线性动力学特征,预报效果好。

No interference was found with conventional drugs, except vancomycin and methylprednisolone. The average concentrations of phenacetin and paracetarnol were (5.94 ± 4.79) and (8.81 ± 2.91)μg/mL in serum,(3.25 ± 1.10) and (570.45 ± 187.13)μg/mL in urine in the 13 healthy volunteers.

除万古霉素和甲泼尼龙外,其他临床常用药物对测定无干扰。13名健康受试者血清中非那西丁和总对乙酰氨基酚浓度为(5.94±4.79)和(8.81±2.91)μg/mL;尿液中非那西丁和总对乙酰氨基酚浓度为(3.25±1.10)和(570.45±187.13)μg/mL。

It also indicates that the inconsistency between the phosphate demand of low analysis phosphorous fertilizer and the usability of phosphate rock can bring great development in future.

另外,通过核算低浓度磷肥的中微量元素价值来提高产品的性价比是促进低浓度磷肥产业健康发展的可能途径。

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Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

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三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。