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蓑蛾越冬幼虫中肠的封闭及中肠细胞淀粉酶的残留

昆虫学报 , 1982,
Abstract:
厦门丽蝇科麻蝇科及家蝇料记录

昆虫学报 , 1958,
Abstract:
检测致突变(致癌)物质的简易法

环境科学学报 , 1985,
Abstract: 螺胚以羟基脲处理使其大多数细胞分裂同步后,以各种化学品或药物处理之,然后测定螺胚增长与对照组比较,凡能损伤DNA的物质均使螺胚增长放慢.此法能检测环境中各类物质的致突变性(致癌性).
原子吸收光谱法间接测定钢铁中铌
,范健
分析化学 , 1994,
Abstract: 在研究铌对原子吸收光谱法测定镍的干扰效应基础上,建立了间接测定钢铁中铌的分析方法,该法测定铌的特征浓度为0.0012μg/ml/1%,直线浓度范围为0~2.0μg/ml,钢铁标样分析表明该法准确度、精密度均好,本文通过X射线衍射分析及镍原子在火焰中的分布规律研究,对铌的增感机理也进行了探讨。
厦门蚊虫名錄及—新种—变种描述
,廖定西
昆虫学报 , 1956,
Abstract:
厦门所见若干蚊虫形态的变异
,廖定西
昆虫学报 , 1956,
Abstract:
南京市和山区降水酸度的初步观测
莫天,国梁
环境科学 , 1982,
Abstract: 酸雨是目前面临的较为重大的环境问题之一,大量自然生成和人为制造的污染物质排入大气,最终又返回地面,引起土壤和地面水的化学性质发生改变.作为这类沉降过程的一部分——酸雨,已对动植物以及人类生
A SIMPLE MODEL FOR DETECTION OF MUTAGENIC (CARCINOGENIC) SUBSTANCES
检测致突变(致癌)物质的简易法

Xie Linge,

环境科学学报 , 1985,
Abstract: A model previously used to screen antitumor drugs was modified for detection of mutagenic (carcinogenic) substances. Cells of snail embryos were synchronized by hydroxyurea for 5.5 hours at G/S borderline. After the release of hydroxyurea inhibition, cells rapidly entered into the S-phase the when was time of chosen to attack the replicating DNA with various gents. The time required to repair the damaged DNA before it could resume its normal function was the time lag of growth of the embryo as compared with the control which was continuously inhibited with hydroxyurea at the same time (2.5h) by the attacking agent.The author had tested six drugs to determine which was potentially to inflict damage to DNA. The result is as follows: mechlo-rethamine (an alkylating agent), mitomycin C (a known mutagen) and 5-fluorouracil (an antimetabolite for cancer therapy) are all capable of damaging DNA, while chloramphenicol (an antibiotics), ascorbic acid (vitamine C) and analgen (a pain-relief drug) are not.Measurement of the length of snail embryo under the microscope is quite easy and relative position of growth-curves plotted on the figures is so meaningful that no statistical analysis is required. An agent which had damaged DNA would cause delayed growth of the embryo and its growth-curve thus lies below that of the control. On the contrary, if an agent Is non-toxic to DNA, the growth of the embryo is, however, faster than the control and its growth-curve lies above that of the control.
无机与有机肥配施下紫色土铵态氮、硝态氮时空变异研究——夏玉米季
红梅,朱 波,朱钟
中国生态农业学报 , 2006,
Abstract: 研究分析夏玉米季几种施肥制度紫色土NH4+-N和NO3--N含量时空分配特征结果表明,各处理土壤NH4+-N、NO3--N含量负相关性强;土壤NH4+-N含量随时间呈“波浪”形变化,成熟期剖面含量呈“K”字型分布,而土壤NO3--N含量则时空分布
无机与有机肥配施麦田(紫色土)铵态氮及硝态氮的时空变异
红梅,朱 波,朱钟
中国生态农业学报 , 2006,
Abstract: 试验研究无机与有机肥配施冬小麦紫色土NH4+-N及NO3--N的时空变异特征结果表明,冬小麦不同生育期施肥后第15d和第120d紫色土NH4+-N含量有两个显著的降低、升高转折点,第15d与N素的硝化作用和挥发作用有关,第120d受此阶段冬小麦的强烈吸收和肥料的矿化释放作用影响较大;土壤NH4+-N和NO3--N含量在不同剖面(0~15cm、15~30cm、30~50cm土层)的分配明显受施用有机肥的影响,有机肥对NO3--N有一定固持作用,阻碍了NO3--N向下迁移,各处理对NO3--N迁移的固持作用表现为秸秆+化肥>猪粪+化肥>鸡粪+化肥>纯化肥处理;土壤NH4+-N与NO3--N含量时空变异有较强的此消彼涨相关性,且施纯化肥处理最明显。
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