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
研究內容主要有：廣州市河涌沉積物及底棲生物體內重金屬含量及評價；汞和硒對劍尾魚的急性毒性和聯合毒性及
安全濃度的評價；汞對劍尾魚鰓和肝臟中抗氧化系統的毒性，包括對總抗氧化能力、超氧化物歧化酶、谷胱甘肽過氧化物酶活力及丙二醛含量的測定及硒對其保護作用；汞對劍尾魚組織生理毒性即：汞對na ~ + - k ~ + atpase活力的影響及硒的保護作用和汞和對劍尾魚組織超微結構的損傷等。以高氯酸?
硝酸消化法和火焰原子吸收分光光度法測定了廣州市河涌沉積物和底棲生物中重金屬含量。
The base was just a smudge on the untouched hundred-mile coast of manila bay.
那基地只是馬尼拉灣一百英里長
安然無恙的海岸線上一個
硝煙滾滾的污點。
The present status of mirabilite and its development countermoves, huaian city
淮
安芒
硝資源開發現狀與發展對策
The efficiency of any automatic safety device should be checked before every nitration.
每種自動
安全裝置應在每次
硝化前進行檢驗。
Resorcinol and 2-nitrodiphenylamine may be used as stabilizers.
間苯二酚和2-
硝基二苯胺可用作
安定劑。
Resorcinol and 2 - nitrodiphenylamine may be used as stabilizers
間苯二酚和2 -
硝基二苯胺可用作
安定劑。
In these transition periods, the digestion system is not well developed yet and is very sensitive to any change in their digestion systems. this stress - related indigestion can eventually lead to death. the stress is easily induced in the above mentioned two stages because zoea begins to take external food since the yolk in its body has been consumed during the nauplius stage
，是由多種酵素，黃蓮黃柏抽出物的綜合體，能迅速
安全的分解殘餌，解決污泥產生，免除亞
硝酸及阿摩尼亞所造成的生理緊迫，更因為神奇的酵素作用，能幫助蝦苗腸道的正常機能，避免蝦苗初飼食物或改變飼料的生理緊迫消化不良而導致死亡。
Study on low detonation velocity expanded ammonium nitrate explosives and its safe property
低爆速膨化
硝銨炸藥及其
安全性研究
Is plugcareplus nitrogen or ammonia base ? that is, is it safe to use in a cold holding area without causing ammonia toxicity
穴盤專用（添加）肥料其是
硝態氮還是氨態氮？也就是說，它在氣候寒冷的地區使用是否
安全，是否會引起氨中毒？
Q : is plugcareplus nitrogen or ammonia base ? that is, is it safe to use in a cold holding area without causing ammonia toxicity
穴盤專用（添加）肥料其是
硝態氮還是氨態氮？也就是說，它在氣候寒冷的地區使用是否
安全，是否會引起氨中毒？
We have more interest in benzofuroxans with amino and nitro substituents because the effect of pushing electron of amino group increases the bond energy of c - no2, and there are strong intramolecular and intermolecular hydrogen bonds between amino and nitro group. these hydrogen contacts can make the molecular structure more stability. so aminonitrobenzodifuroxan may have good heat resistance and low impact sensitivity
所以我們對氨基
硝基苯並氧化呋咱這類炸藥更為關注，因為氨基的推電子效應使c - no _ 2鍵能增強，且氨基的氫原子與
硝基的氧原子間形成強的分子內和分子間氫鍵，更增強了分子的穩定性，所以它們可能獲得優良的熱
安定性和較低的感度。
Child use and care articles - methodes for determining the release of n - nitrosamines and n - nitrosatable substances from elastomer or rubber teats and soothers
兒童使用和護理用品.彈性或橡皮奶嘴和
安慰用品中n -亞
硝胺和n - nitrosatable釋放量測定方法
Based on the study on the current instance of agricultural environmental quality and safety in chongqing city, we put forward that : make the best of the environmental resources, carry on the layout of agriculture production, and adjust the agricultural structure ; strengthen ecoenvironmental protection and pollution control in the outskirts of the city ; reasonably apply pesticides and fertilizers in order to avoid agriculture products being polluted by them ; strengthen the construction of monitoring system of agricultural environment and agriculture product quality and safety in the whole city, and develop early warning monitoring ; strengthen non - point pollution control in the three gorges reservoir area ; and conduct more researches on controlling of priority pollutants in agricultural environment
摘要對重慶市農業環境質量
安全現狀進行了研究分析，提出了充分利用環境資源比較優勢，進行農業生產布局和農業結構調整；加強城郊區農業生態環境保護和污染的治理；合理施用農藥化肥，防止農產品農藥殘留和
硝酸鹽污染；加強全市農業環境與農產品質量
安全監測體系建設，開展預警監測；加強三峽庫區農業面源污染防治；進一步開展農業環境優先污染物的控制研究等防治對策。
Finally, paper takes the decomposing explosion of methyl nitrate as an example to illustrate how to use this approach to quantitatively evaluate the potential dangers in such exothermic reaction system with possibility of thermal explosion
用
硝酸甲酯分解爆炸實例，說明如何利用
安全指數對具有熱爆炸可能性的系統的潛在危險性進行定量評價，其預測結果與實驗結果一致。
Prince andrey mounted his horse but lingered at the battery, looking at the smoke of the cannon from which the ball had flown. his eyes moved rapidly over the wide plain
安德烈公爵騎著馬站在炮臺上，抬眼望著大炮的
硝煙，一枚炮彈飛也似地射出去了。
Determination for nitrites in meat by derivative voltammetry
導數伏
安法測定肉類食品中的亞
硝酸鹽
Child use and care articles - methods for determining the release of n - nitrosamines and n - nitrosatable substances from elastomer or rubber teats and soothers
兒童使用和護理用品.測定合成橡膠或橡膠奶嘴和
安撫奶嘴中釋放的n -亞
硝胺和n -可亞
硝化物質的方法
The scientists said 39 percent of women in the placebo group had a pre - term delivery compared to 62 percent of women who had received metronidazole. " preterm delivery may be increased by metronidazole therapy, " shennan said in the report
研究結果顯示，在使用安慰劑的那組中，有39的孕婦最後早產然而在接受藥物甲硝唑治療的那組中，則有62的孕婦早產。
