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Search Results: 1 - 10 of 279417 matches for " br>席芳 "
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A comparative study on feeding intensity of two rotifer Brachionus calyciflorus strains
两品系萼花臂尾轮虫摄食强度的比较研究

GE Yali,XI Yilong,CHEN Fang,<br>葛雅丽,贻龙,
应用生态学报 , 2005,
Abstract: The study on the feeding intensity and its relationships with food concentration, food quality and cultural duration of Guangzhou and Wuhu Brachionus calyciflorus strains showed that the filtration and ingestion rates of the rotifers decreased with their increasing cultural duration. Within 20 hours, there was a curvilinear relationship between the filtration rate of both the two strains and food concentration, but a linear relationship between the ingestion rate and food concentration. The filtration rate of Guangzhou and Wuhu strains was 0.0029 +/- 0.0001 ml x ind. (-1) x h(-1) and 0.0039 +/- 0.0008 ml ind. (-1) x h(-1), respectively, when fed on Chlorella pyrenoidosa, which were higher than fed on the other two types of food. The ingestion rate of Guangzhou strain fed on Chlorella pyrenoidosa (0.3992 x 10(4) +/- 0.00850 x 10(4) cell ind. (-1) x h(-1)) was higher than that fed on Scenedesmus obliquus (0.1670 x 10(4) +/- 0.0370 x 10(4) cell x ind.(-1) x h(-1)), but each of them was similar with that on mixed algae. The ingestion rate of Wuhu strain was not significantly affected by food type. The filtration and ingestion rates between the two strains differed with food concentration, food type and culture duration.
Effect of storage temperature on physiology and ultrastructure of persimmon fruit
贮藏温度对柿果生理和超微结构的影响

LUO Zi-sheng,XI Yu-fang,<br>罗自生,
浙江大学学报(农业与生命科学版) , 2005,
Abstract: 柿果在12℃下可贮藏20~25 d,在8℃下可贮藏35~45 d,想贮藏50 d以上,要求4℃或以下的低温下贮藏,但柿果在低于4℃下贮藏20 d后,移到常温下后熟时,又容易发生冷害,导致果实细胞壁初生壁和中胶层不能正常降解,增加果汁相对粘度,使果肉出汁率降低,果实的呼吸速率和乙烯释放量异常增加.
STUDIES ON THE INTERACTION OF PHENYLALANINE AND ITS RARE EARTH COMPLEXES WITH DIPALMITOYLPHOSPHATIDYLCHOLINE LIPOSOSMES
苯丙氨酸稀土配合物与磷脂脂质体相互作用的研究

Tian Fang,Zeng Guangfu,Xi Shiquan,<br>田,曾广赋,马爱增,时权
生物物理学报 , 1994,
Abstract: The effect of phenylalanine(Phe) and its rare earth complexes (Ln(phe)cl3.6H2O) on thephase transition of dipalmitoylphosphatidylcholine valides studied by calorimetry (DSC) and Infrared spectroscopy. The results show that both rare earth complexes ofthe and rare earth ions (Ln3 ) caused a considerable increase in the gel to liquid crystallinephase transition temperature(Tm) for DPPC liposomes and an increase in the order degree ofconformation of acyl chain. The effect of Ln3 was stronger than that of Ln(Phe)Cl3.6H2O.FT-IR study on DPPC CaSt-dry film was similar to the above results which indicated that both Ln(Phe)Cl3.6H2O and Ln3 had electrostatic interactions with DPPC, hilt Phe hadn't. Thecooperative band of Ln(Phe)Cl3.6H2O is inic form.
Effects of glyphosate on life history characteristics of freshwater rotifer Brachionus calyciflorus
除草剂草甘膦对萼花臂尾轮虫生活史特征的影响

CHU,<br>储昭霞,贻龙,徐晓平,葛雅丽,董丽丽,
应用生态学报 , 2005,
Abstract: The life table study on the life history characteristics of freshwater rotifer Brachionus calyciflorus under effects of different concentrations glyphosate showed that glyphosate had significant effects on the embryonic developmental time, duration of juvenile and reproductive periods, average lifespan, net reproductive rate, and intrinsic population increasing rate of the rotifer. The embryonic developmental time was significantly lengthened when exposed to 3 and 8 mg x L(-1) glyphosate, the juvenile period began to be lengthened significantly when exposed to 3 mg x L(-1) glyphosate, while the net reproductive rate and intrinsic population increasing rate decreased significantly when the rotifer was exposed to 8.00 and 10.50 mg x L(-1) glyphosate, respectively. Among all the parameters, intrinsic population increasing rate was the most sensitive parameter which could be used in monitoring the effects of glyphosate on the life history characteristics of B. calyciflorus.
Chinese Remainder Theorem-Based Secret Sharing Scheme
基于中国剩余定理的秘密共享组播密钥管理方案

Xi Guo-bao,Chen Hui-fang,Zhao Wen-dao,<br>国宝,陈惠,赵问道
电子与信息学报 , 2006,
Abstract: This paper proposes Chinese Remainder Theorem-based Secret Sharing (CRTSS) scheme, a new Multicast Key Management (MKM) scheme, which adopts the Chinese remainder theorem and Shamir’s secret sharing method. With comparing and analyzing GKMP and CRTSS schemes, the results show that CRTSS scheme overcomes high rekeying cost, the defect of conventional centralized flat schemes, improves the performance. It is a new reliable centralized flat MKM scheme.
常山酮对小鼠子宫内膜异位症巨噬细胞极化的调控作用
Effect of halofuginone on macrophage polarization in endometriosis mouse

杨延军,梁静,,杜令<br>YANG Yanjun, LIANG Jing, LI Fang, DU Lingxi
- , 2016, DOI: 10.6040/j.issn.1671-7554.0.2016.149
Abstract:
松辽盆地青山口组二段下部湖泊水体环境变化

曹怀仁,胡建,彭平安,党鹏<br>CAO Huairen,HU Jianfang,PENG Pingan,XI Dangpeng
- , 2017, DOI: 10.13745/j.esf.2017.01.013
Abstract: 以松辽盆地李家坨子露头剖面为研究对象,利用热解和生物标志化合物数据研究了青山口组二段下部(K2qn2)的沉积水体环境。该剖面样品成熟度均较低,氢指数和氧指数分别介于210~773(mg HC/g TOC)和2~188(mg CO2/g TOC),其交叉图表明有机质主要来源于水生生物。根据地球化学数据,整个剖面湖泊水体环境演化可分为3个演化时期:阶段Ⅰ的伽马蜡烷指数及芳基类异戊二烯/菲比值较低,结合低的重排甾烷/规则甾烷比值及姥鲛烷/植烷比值和脱羟基维生素指数交叉图,指示湖水以半咸水的缺氧条件为主。阶段Ⅱ中,24-正丙基胆甾烷和24-异丙基胆甾烷含量变化证明该阶段发生短时间尺度的海水入侵事件,并导致半深湖到深湖相的缺氧环境;海水入侵带来大量的海洋生物、氧气、营养有机质及含硫物质,使得湖水盐度升高并以半咸水到咸水为主;高丰度的芳基类异戊二烯化合物反映该时期水体中富含自由态的H2S,并且伴随水体分层、透光带缺氧及化跃层上移现象。但是,阶段Ⅱ演化的后期阶段湖水以淡水到半咸水沉积为主,同时氧含量升高,指示淡水输入量增加。阶段Ⅲ沉积时期因受到半干旱气候条件的影响,水体出现高盐度、缺氧且化跃层较浅的沉积环境,此时期动荡的水体不利于绿硫细菌的生长发育及游离态H2S的保存。
改进的真菌载片标本制作法

微生物学通报 , 1984,
Abstract: 真菌的孢子梗小而脆弱,用显微镜观察时,制备成完整又清晰的载片标本,有一定困难。现有的载片培养法,操作麻烦,容易污染,载玻片与盖玻片之间有一小块培养基,菌丝和孢子梗太多,互相交错,又不在一个平面上,观察不清晰。扦片培养法虽然操作简便,适于观察多种真菌,但从培养基内取出盖玻片时,容易
A Security Scheme for the Centralized Video Conference
一种集中式可视会议的安全解决方案

国宝,陈惠
计算机系统应用 , 2004,
Abstract: 简述了集中式可视会议系统和组播的安全要求,主要介绍了一种结合组播密钥管理和组播安全策略,应用于集中式可视会议的安全解决方案,从而提高可视会议的整体安全性能.
热风预处理保鲜椪柑的研究
王向阳,
食品科学 , 1996,
Abstract: ?柑贮前用53℃热风处理5min,显著减少了贮藏中的腐烂率和枯水指数。这可能与该处理减少果皮电导率和降低果实呼吸强度有关。
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