安全浓度 meaning in English
safe concentration
safeconcentration
safety concentration
Examples
- 41 mg / l and 2 . 23 mg / l respectively . the safe concentration of cu to crucian was slightly lower than standard of fishery water quality
Cu对鲫鱼的安全浓度略低于渔业水域水质标准， zn 、 cd和cr的安全浓度远远高于标准。 - The safe concentrations of zn , cd and cr to crucian were far exceeded the standard . the short - term accumulation and distribution in young crucian tissue of mixed secure concentrations of heavy metals cu , zn , cr and cd pollution was studied . the results showed that associated interaction of the four heavy metals was synergistic effect of accumulated toxic
研究了安全浓度的混合重金属cu 、 zn 、 cr 、 cd污染在鲫鱼幼体组织中短期的积累和分布，实验结果表明： cu 、 zn 、 cd和cr四种重金属之间的联合作用为毒性剧增的快同作用。 - Using cd , cu , zn and cr as experimental toxicants and crucian as experimental creature , we employed the environmental biotechniques ( flame atomic absorption spectrophotometry , the method of improved pyrogallol autoxidation and electron microscopy ) to study the acute toxicity and secure concentrations of heavy metals to crucian ; the accumulation and distribution of mixed heavy metals to fingling crucian ; the activities of superoxide dismutase ( sod ) of gill and liver tissues and the hispathological and ultrastructural change of superfine structure of liver and kidney of crucian after cadmium exposure . through which , we intended to fully and systemically study the toxic influence of heavy metals to fish , and preliminarily discuss the influence of heavy metals pollution to the diversified level of fish such as individual , organ , tissue , cell and molecule . thus we tried to provide scientific evidence to establish preventative management measures , avoid and relieve the harm of heavy metals pollution to aquicolous ecosystem in time
随后以这几种重金属作为实验毒物，以鲫鱼为实验动物，应用环境生物技术、火焰原子吸收分光光度法、邻苯三酚自氧化法、透射电镜等技术研究了重金属cu 、 zn 、 cd和cr对鲫鱼的急性毒性及其安全浓度评价、混合重金属在鲫鱼幼体组织内的积累和分布、 cd对鲫鱼鳃和肝脏中sod活性的影响、 cd对鲫鱼肝细胞和肾细胞超微结构的影响等，全面和系统地研究了水环境中重金属暴露对鱼类的毒性影响，初步探讨了重金属污染对鱼类的个体? ?器官? ?组织? ?细胞? ?分子等各水平层次的影响，为制定渔业生产上预防性的管理措施提供科学依据，及时避免或减轻重金属污染对水生生态系统造成的损害。 - The main study in this paper included as follows : the content and distribution of heavy metals in sediments and benthic organisms from the sewage stream in guangzhou city ; the acute toxicity and joint toxicity of mercury and selenium to swordtail fish ( xiphophorus helleri ) ; the damage of mercury to the indexes of antioxidant system in the gills and livers in swordtail ( including the measurement of the activities of total antioxidative capacity [ t ~ aoc ] , superoxide dismutase [ sod ] , glutathione peroxidase [ gsh - px ] and the concentration of malondiald - ehyde [ mda ] ) and the relief effects of selenium on it , as well as the physiological damage of mercury on the tissues , namely : the antagonistic effect of na + - k + ~ atpase activity on the tissues between selenite and mercury , and the ultrastructural damage under the exposure of mercury
研究内容主要有：广州市河涌沉积物及底栖生物体内重金属含量及评价；汞和硒对剑尾鱼的急性毒性和联合毒性及安全浓度的评价；汞对剑尾鱼鳃和肝脏中抗氧化系统的毒性，包括对总抗氧化能力、超氧化物歧化酶、谷胱甘肽过氧化物酶活力及丙二醛含量的测定及硒对其保护作用；汞对剑尾鱼组织生理毒性即：汞对na ~ + - k ~ + atpase活力的影响及硒的保护作用和汞和对剑尾鱼组织超微结构的损伤等。以高氯酸?硝酸消化法和火焰原子吸收分光光度法测定了广州市河涌沉积物和底栖生物中重金属含量。