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Search Results: 1 - 10 of 110126 matches for " 徐镜波 "
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热排放对水库溶解氧的影响

环境科学学报 , 1993,
Abstract: 报道了电厂热排放对水库溶解氧的影响。结果表明,溶解氧含量随水温而变化,建立了T-DO回归方程.除深水库底层外,溶解氧含量通常不小于5.0mg/L.大伙房水库的自然生态环境特征是湖水的季节性分层和夏季底层贫氧.电厂热排放,表层水温增加,使湖水分层更加明显,热成层和化学成层的延长将导致夏季极端气象条件下湖下层氧的耗竭加强.
温度、盐度、铜、氨对对虾仔虾(Penaues orientalis K)和光滑河兰蛤(Potamocorbula laevis)的影响

环境科学学报 , 1991,
Abstract: 在室内模拟条件下,进行了热冲击及其与盐度、铜、氨联合对对虾仔虾和光滑河兰蛤的急性影响研究。结果表明,两种动物的起始致死温度(TL50)和最高临界温度(CTM)随驯化温度的升高而增大;随盐度的降低,仔虾的耐高温能力明显降低,而兰蛤对盐度变化反应不明显;高温明显提高铜、氨对仔虾的毒性。也提高铜对兰蛤的毒性,但降低氨对兰蛤的毒性影响。仔虾对高温、低盐、铜离子及非离子氨反应敏感。
EFFECT OF THERMAL DISCHARGE FROM POWER PLANTS ON DISSOLVED OXYGEN CONTENT OF RESERVOIRS
热排放对水库溶解氧的影响

Xu Jingbo,

环境科学学报 , 1993,
Abstract: The effect of thermal discharge from power plants on dissolved oxygen contents of water from reservoirs was studied. Results obtained indicated that the content of dissolved oxygen changed with water temperature. The regres sion equation of T-DO has been fitted. Except the bottom layer of deep reservoirs, the dissolved oxygen was not found to be below 5.0 mg/L. The results showed the deficiency in dissolved oxygen in water from bottom of Dahuofang reservoir during summer. After discharging of hot water, the temperature of the surface layer increased and the stratification was strengthened. Prolonging chemical and thermal stratification of water lead to speed up the hypolimnetic oxygen depletion under extreme climate condition of summer.
单甲脒农药对鱼脑胆碱酯酶活性的影响
,何春光,孙刚
环境化学 , 2015,
Abstract: 金鱼、鲤鱼在实验室(16±4℃)驯化4-7d,其脑胆碱酯酶(AChE)活力在显著水平为P≤0.05时,不同组的金鱼(5-7cm)、鲤鱼(10-12cm)无显著差异.离体实验条件下,单甲脒(DMA)农药对金鱼、鲤鱼的半抑制浓度分别为125.9mg·1-1和25.7mg·l-1.DMA农药对鲤鱼的作用大于对金鱼的作用.鱼脑AChE可以作为一项指标用于毒理学研究.
过氧化氢酶活性及活性抑制的测定
,郎佩珍
环境化学 , 2015,
Abstract: 广泛存在于微生物及动植物体内的过氧化氢酶已应用于生态毒理及生态化学的研究领域.本文主要介绍了通过鱼肝过氧化氢酶活性抑制的测定.来估价受试化学品对水生生物急性及亚急性效应的方法.
2,4-DNT对鲤鱼的急性和亚急性毒性
,景体淞
环境科学 , 1998,
Abstract: 实验测定2,4-DNT对鲤鱼的急性和亚急性毒性。亚急性试验经1.640、3.280、4.919、6.559、9.109mg·L-12,4-DNT暴露36d,在15-19℃下,24、48、72、96h的LC50值分别为30.78、27.98、25.84、24.96mg·L-1.亚急性试验中,根据2,4-DNT对鲤鱼生长和肝ATPase活力的影响,求得2,4-DNT的最大允许毒物浓度为1.640-3.280mg·L-1.
Synergistic degradation of 2-chloronitrobenzene by two strains of bacteria
两株细菌对邻氯硝基苯的协同降解

李明堂,,卢振兰,曹国军
环境科学学报 , 2010,
Abstract: Under the conditions of pure and simulated water body culture, two strains of indigenous bacteria Acinetobacter calcoaceticus and Pseudomonas putida, which are able to effectively degrade chlorobenzene and nitrobenzene respectively, were used to study synergistic degradation of 2-chloronitrobenzene. Results showed that the order of capacity to degrade 2-chloronitrobenzene was the mixture of two strains>Pseudomonas putida>Acinetobacter calcoaceticus. Under pure culture conditions, 94.5% of 2-chloronitrobenzene was degraded by the mixture of strains after 6 d of incubation. The degradation of 2-chloronitrobenzene was accompanied by the release of NO-2 and Cl-. The release of NO-2 was earlier than that of Cl-, but the total net released Cl- was more than that of NO-2. The addition of glucose significantly accelerated the growth of bacterial cells and decreased the accumulation of NO-2, but failed to promote the degradation of 2-chloronitrobenzene. In the conditions of simulated water body culture, the mixture of the strains played the main role in the removal of 2-chloronitrobenzene in the aqueous phase. The sludge, pebbles and organisms attached to the surface of pebbles obviously promoted the removal of 2-chloronitrobenzene. After 8 d of incubation, the removal rate of 2-chloronitrobenzene (92.5%) in the simulated system with sludge was larger than that in the simulated system with pebbles (85.5%). The findings of this research can provide a new pathway for the removal of 2-chloronitrobenzene in the environment.
两株细菌对邻氯硝基苯的协同降解
李明堂,,卢振兰,曹国军
环境科学学报 , 2010,
Abstract: 在纯培养和水体模拟培养条件下,分别研究了对氯苯和硝基苯具有高效降解性能的两株土著菌Acinetobactercalcoaceticus和Pseudomonasputida对邻氯硝基苯的协同降解效果.结果表明,纯培养条件下不同菌悬液对邻氯硝基苯的降解能力大小顺序为:混合菌群>Pseudomonasputida>Acinetobactercalcoaceticus,培养6d后,混合菌群对邻氯硝基苯的降解率可达到94.5%;混合菌群降解邻氯硝基苯的过程中伴随着NO2-和Cl-的释放,且NO2-的释放早于Cl-,Cl-的总净释放量大于NO2-;葡萄糖的加入能显著促进菌体细胞的生长,降低亚硝酸根离子的积累,但未能显著提高邻氯硝基苯的降解效果.在水体模拟培养条件下,水相中邻氯硝基苯的去除主要依靠混合菌群的降解作用;底泥、鹅卵石及其表面附着的生物能明显促进邻氯硝基苯的去除;在相同条件下培养8d后,基质为底泥时邻氯硝基苯的去除效率可达92.5%,大于基质为鹅卵石时的去除率(85.5%).研究结果可为环境中邻氯硝基苯的去除提供新的途径.
硝基苯类化合物微生物降解研究进展
盛连喜,李明堂,
应用生态学报 , 2007,
Abstract: 硝基苯类化合物是一类具有稳定化学性质、高毒性和易在生物体内积累的优先污染物.微生物降解在硝基苯类化合物废水废气治理和污染环境修复方面具有明显优势.从降解菌的驯化筛选、降解途径、降解机理、共代谢、趋化性和分子遗传学角度,阐述了硝基苯类化合物微生物降解研究的最新进展,指出应进一步加强工程菌的构建及其应用开发研究.在硝基苯类化合物污染环境的微生物修复方面,共代谢和混合菌株的协同作用具有重要的应用前景.
过氧化氢酶活性及活性抑制的紫外分光光度测定
,袁晓凡,郎佩珍
环境化学 , 2015,
Abstract: 在体内实验条件下,测定了鲤鱼肝脏过氧化氢酶的活性.实验结果表明,过氧化氢酶的紫外分光光度法是可靠的.活性抑制结果表明,对-二硝基苯(p-DNB)对鲤鱼肝脏过氧化氢酶均有明显的抑制作用,EC50值为0.0807mg·1-1.鲤鱼肝脏过氧化氢酶可作为一项指标用于生态毒理学研究.
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