toxicity level 中文意思是什麼
toxicity level
解釋
毒性標準-
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
隨后以這幾種重金屬作為實驗毒物，以鯽魚為實驗動物，應用環境生物技術、火焰原子吸收分光光度法、鄰苯三酚自氧化法、透射電鏡等技術研究了重金屬cu 、 zn 、 cd和cr對鯽魚的急性毒性及其安全濃度評價、混合重金屬在鯽魚幼體組織內的積累和分佈、 cd對鯽魚鰓和肝臟中sod活性的影響、 cd對鯽魚肝細胞和腎細胞超微結構的影響等，全面和系統地研究了水環境中重金屬暴露對魚類的毒性影響，初步探討了重金屬污染對魚類的個體? ?器官? ?組織? ?細胞? ?分子等各水平層次的影響，為制定漁業生產上預防性的管理措施提供科學依據，及時避免或減輕重金屬污染對水生生態系統造成的損害。 -
Mdr1 express product p - glycoprotein was detected by immunocytochemical method and flowcytometry. the cytotoxicity and multidrug resistance reversion effect of tea polyphenol was examined by mtt assay in mcf - 7 and mcf - 7 adr carcinoma cell lines, and compared with pgp inhibitor quinidine. the pgp expression of mcf - 7 adr was strongly positive, the positive rate was 15 % ; the pgp expression of mcf - 7 was negative, the positive rate was 1. 8 %. ic50 of tea polyphenol to mcf - 7 and mcf - 7 adr is 115. 2g ml and 207. 6g ml respectively. ic50 of quinidine to mcf - 7 and mcf - 7 adr is 129. 8mol l 42. 1g ml and 94. 1mol l 30. 5g ml respectively. tea polyphenol and quinidine changed little toxicity of adriamycin to mcf - 7, but tea polyphenol and quinidine improved the sensitivity of mcf - 7adr to adriamycin significantly. immunocytochemistry and flow cytometry can detect p - glycoprotein expression level qualitatively and quantitatively. tea polyphenol is not only an anti - tumor agent, but also a multidrug resistant modulator similar as quinidine. tea polyphenol is advantageous for its little toxicity in tumor treatment
用免疫組化法和流式細胞儀對腫瘤細胞系mcf - 7和mcf - 7 adr的p -糖蛋白表達水平進行定性定量研究。用噻唑藍比色法mtt研究茶多酚的細胞毒性及其對耐藥性的逆轉作用，並與pgp抑制劑奎尼定進行了比較。免疫組化法檢測p -糖蛋白表達水平， mcf - 7 adr呈強陽性，而mcf - 7呈陰性流式細胞儀定量檢測結果mcf - 7 adr細胞系細胞陽性率為15 % ， mcf - 7細胞系細胞陽性率為1 . 8 % 。 -
Summarizing the effects of pbmblc on the three strains, it is known that genetically engineered strain construction using this method can not get sati sfactory results, though the potency of ybt - 1535 ' s transformants was higher than ybt - 1535. because of the low toxicity level of ybt - 1535, the transformants with higher potency cannot be utilized commercially
綜合這三個菌株的實驗結果，雖然菌株ybt - 1535轉化子的綜合毒力有所提高，但那是建立在ybt - 1535較低毒力水平之上的，轉化子的毒效離實際應用相差甚遠，工程菌構建的基本思路可能需作大的改變。 -
The levels of vitamins contained in the supplement are usually much higher than the recommended level. side effects may occur with prolonged intake of certain vitamins. for example, liver toxicity may occur with excessive intake of vitamin a. adverse effects from vitamin c supplement can include stomach discomfort and risk of developing kidney and urinary stones
現時市面售賣的維生素補充劑種類繁多，配方及劑量都各有不同，未必人人適用，而且維生素的劑量大多遠超過建議的攝取量，長期服用有可能會產生副作用，例如過量服用維生素a補充劑會引致肝中毒，高劑量的維生素c補充劑可能會令腸胃不適，以及增加患腎石及尿道石的機會。 -
In ivtro cytotoxicity test indicated that the cell toxicity of the cck leaching solution was approximately at 0 level
體外細胞毒性實驗示浸提液細胞毒性接近於0級。 -
“ for a male contraceptive even a very low level of toxicity is unacceptable which is why we adopted the approach of using follicle - stimulating hormone, ” dr
「作為一個男性避孕藥，哪怕它的毒性只在一個非常低的水平也是不可以的，所以我們採用了使用促卵泡激素的方法。 」 -
The security of cp i according to the experiments of mice accute toxicity was evaluated, guinea pig sensitization and cytotoxicity experiment in integer level and cell level. it showed that : the mice had no toxic reaction ; the guinea pig ' s points of injection had no erythema and dropsy ; the cytotoxicity was lower than i class. the results proved that cp i had no poison side effects
通過小鼠急性毒性試驗、豚鼠致敏試驗、細胞毒性試驗對自製cp進行整體水平和細胞水平的生物安全性評價，觀察期內，小鼠未見異常毒性反應；豚鼠注射點無紅斑及水腫情況；細胞毒性小於級，結果證明本方法制備的cp無毒副作用。 -
On such a basis some useful countermeasures are pot forward, including strengthening the management of wetland nature reserves ; screening out a first group of cities or counties where use of carbofuran should be prohibited ; consummating the laws and regulations related to wetland bird reserves and natural reserves ; readjusting the structure of pesticide products ; demonstrating and promoting new pesticides high in effectiveness and low in toxicity ; improving the management level of natural reserves ; enforcing exsisting laws against birds poisoning ; and intensifying control of sales and use of pesticides
針對當前我國克百威農藥使用量大，對濕地鳥類構成嚴重威脅的實際情況，提出了具體的保護對策，包括：篩選一批重要濕地自然保護區進行嚴格管護；篩選出我國首批禁用克百威農藥的市、縣；完善濕地鳥類保護與自然保護區法律法規建設；調整農藥產品結構，示範推廣高效低毒的新農藥品種；提高自然保護區管理水平，對毒害鳥類案件嚴格執法；加強對農藥銷售和使用的管理。 -
The insecticide, which is proven to be effective against mosquito larvae, has a low level of toxicity to humans
Bti已證明能有效對付蚊子幼蟲，且毒性不高，不會損害人體健康。 -
The protein level of nf - kb in nucleus peaks at 6 h after stimulation and persists for at least 6 h. pdtc ( pyrrolidinedithiocarbamate ), an inhibitor of nf - kb, the effective concentration of it for nf - kb inhibition without any toxicity on cells is up to 100 umol / l, can significantly block no production induced by oligochitosan. although the study reported herein reveals that oligochitosan induces no production via nf - kb in macrophage, which is an important signaling mechanism of oligochitosan inducing immuno - enhancement of macrophage in vitro
加入100林mol / l劑量的nf一忍抑制劑毗咯烷二硫代氨基甲酸鹽（ pnte ）作用於rawz 「 . 7細胞（ 4火10 ，個細胞/ ml ） 90rnin ，然後再加入100林留而劑量的殼寡糖對巨噬細胞進行刺激，發現pdtc在各個時間點（ 6 、 12 、 18 、 24h ）都明顯抑制殼寡糖對巨噬細胞no的誘導作用。 -
Assessing risk is often a time consuming process, as it not possible in most instances to test for toxicity directly on human subjects and thus multiple indirect tests must be conducted for scientists to understand at what concentration level the contaminant may become a health risk
這個過程可能要花費很長的時間，因為大多數情況下都不可能以人體作為實驗對象進行毒性評估，而科學家必須通過多種間接的試驗才能弄清楚有害物質達到什麼樣的濃度才會對健康造成危害。 -
The properties of expressing cry1ac and crylca in bmb171 was also studied by quantifying the expression level and determining the toxicity of the relevant transformants again st two lepidopteran larvae
對小菜蛾3齡幼蟲和甜菜夜蛾初孵幼蟲的毒力測定結果表明， bmb171表達cry1ac基因的殺蟲毒力高於bt - 4q7和bt - 4d10 ，略低於bti
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