共查询到20条相似文献，搜索用时 967 毫秒
1.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｉｎ 1988,Ｙｏｓｈｉｚａｗａａｎｄｃｏ ｗｏｒｋｅｒｓ[1] ｒｅｐｏｒｔｅｄｆｏｒｔｈｅｆｉｒｓｔｔｉｍｅｏｎａｎｅｗｇｏｏｄｓｏｆｔｍａｇｎｅｔｉｃａｌｌｏｙｃａｌｌｅｄＦｉｎｅｍｅｔ.Ｉｔｃｏｎｓｉｓｔｅｄｏｆｕｌｔｒａｆｉｎｅｇｒａｉｎｓｔｒｕｃｔｕｒｅｐｒｅ ｐａｒｅｄｂｙｔｈｅｃｒｙｓｔａｌｌｉｚａｔｉｏｎｏｆＦｅ Ｓｉ ＢａｍｏｒｐｈｏｕｓａｌｌｏｙｗｉｔｈａｄｄｉｔｉｏｎｓｏｆＣｕａｎｄＮｂ[1～ 3] .Ｔｈｅｆｏｒｍａｔｉｏｎｏｆｔｈｉｓｐａｒｔｉｃｕｌａｒｓｔ… 相似文献
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1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｆｅ3Ａｌｂａｓｅｄａｌｌｏｙｓｅｘｈｉｂｉｔｈｉｇｈｏｘｉｄａｔｉｏｎｒｅｓｉｓｔａｎｃｅ ,ｅｘｃｅｌｌｅｎｔｓｕｌｐｈｉｄａｔｉｏｎｒｅｓｉｓｔａｎｃｅａｎｄｌｏｗｃｏｓｔｏｆａｌｌｏｙｃｏｎｓｔｉｔｕｅｎｔｓ.Ｈｏｗｅｖｅｒ ,ｔｈｅｓｅａｌｌｏｙｓｈａｖｅｎｏｔ ｙｅｔｆｏｕｎｄｗｉｄｅｓｐｒｅａｄａｐｐｌｉｃａｔｉｏｎｆｏｒｔｈｅｉｒｅｎｖｉｒｏｎｍｅｎｔａｌｅｍｂｒｉｔｔｌｅｍｅｎｔ[1～ 3] .Ｔｈｅｔｅｎｓｉｌｅｐｒｏｐｅｒｔｉｅｓａｎｄｅｎｖｉ ｒｏｎｍｅｎｔ… 相似文献
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1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｓｉｎｃｅ 1990 ,ａｎｉｍｐｏｒｔａｎｔｄｉｓｃｏｖｅｒｙｉｎｒｏｔｏｒ ｈｙｄｒｏ ｄｙｎａｍｉｃｂｅａｒｉｎｇｓｙｓｔｅｍｄｙｎａｍｉｃｓｉｓｔｈｅｃｏｕｐｌｅｄａｃ ｔｉｏｎｏｆｔｈｒｕｓｔｂｅａｒｉｎｇｕｐｏｎｔｈｅｌａｔｅｒａｌｖｉｂｒａｔｉｏｎｉｎａｒｏｔｏｒｓｙｓｔｅｍ .Ｉｎｔｈｅ ｐｉｏｎｅｅｒｉｎｇｒｅｓｅａｒｃｈｏｆＭｉｔｔｗｏｌｌｅｎｅｔａｌ .( 1990 ) [1] ,ａｓｅｒｉｅｓｏｆｒｏｔｏｒ ｄｙｎａｍ ｉｃｃｏｅｆｆｉｃｉｅｎｔｓｏｆｔｈｒｕｓｔｍａｇｎｅ… 相似文献
4.
贺国强 《上海大学学报(英文版)》2000,4(2)
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ ＬｅｔＸ ,ＹｂｅｔｗｏＨｉｌｂｅｒｔｓｐａｃｅｓａｎｄｌｅｔＡｂｅａｂｏｕｎｄｅｄｌｉｎｅａｒｏｐｅｒａｔｏｒ,ｉ.ｅ .,Ａ∈Ｂ(Ｘ ,Ｙ) .Ｃｏｎｓｉｄ ｅｒｔｈｅｏｐｅｒａｔｏｒｅｑｕａｔｉｏｎＡｘ=ｙ . (1)ＩｆＲ(Ａ) ,ｔｈｅｒａｎｇｅｏｆＡ ,ｉｓｎｏｎｃｌｏｓｅｄｉｎＹ ,Ｅｑ .(1)ｉｓｉｌｌ ｐｏｓｅｄ[1] .Ｍａｎｙｉｍｐｏｒｔａｎｔｐｒｏｂｌｅｍｓｉｎａｐｐｌｉｅｄｓｃｉ ｅｎｃｅｓｒｅｓｕｌｔｉｎｔｈｉｓｋｉｎｄｏｆｅｑｕａｔｉｏｎｓ[2 ,3] .Ｉｎｔｈｉｓｐａｐｅｒｗｅｃ… 相似文献
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1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｃｏａｇｕｌａｔｉｏｎｉｓａｎｉｒｒｅｖｅｒｓｉｂｌｅ ｐｈｙｓｉｃａｌ ｐｒｏｃｅｓｓｉｎｗｈｉｃｈａｎｕｍｂｅｒｏｆｂａｓｉｃｕｎｉｔｓ(ｍｏｎｏｍｅｒｓ)ｓｔｉｃｋｔｏｇｅｔｈ ｅｒｔｏｂｕｉｌｄｃｌｕｓｔｅｒｓ.ＴｈｅｔｉｍｅｅｖｏｌｕｔｉｏｎｏｆｃｌｕｓｔｅｒｉｎｇｐｒｏｃｅｓｓｃａｎｂｅｄｅｓｃｒｉｂｅｄｂｙｔｈｅＳｍｏｌｕｃｈｏｖｓｋｉｅｑｕａ ｔｉｏｎ[1 ],ｗｈｉｃｈｉｓｄ Ｃｋｄ ｔ =12 ∑ｉ ｊ=ｋＫ(ｉ,ｊ)ＣｉＣｊ-Ｃｋ∑ｊＫ(ｊ,ｋ)Ｃｊ,(1)ｗｈｅｒｅＣｋｄ… 相似文献
6.
刘士平 《上海大学学报(英文版)》2002,(4)
1 Ｉｎｔｒｏｄｕｃｔｉｉｏｎ Ｉｎ 1994 ,Ｏ’ＬｅａｒｙａｎｄＹｅｒｅｍｉｎ[1] ｅｘｔｅｎｄｅｄｔｈｅｑｕａｓｉ Ｎｅｗｔｏｎａｌｇｏｒｉｔｈｍｔｏｔｈｅｂｌｏｃｋｃａｓｅ ,ｉｎｗｈｉｃｈｔｈｅｙｍｉｎｉｍｉｚｅｄａｃｏｌｌｅｃｔｉｏｎｏｆｔｈｅｆｏｌｌｏｗｉｎｇｆｕｎｃｔｉｏｎｓ :ｆｉ(ｘ) =ｆ～(ｘ) +ｂＴｉｘ +ｃｉ (ｉ=1,… ,ｐ) (1.1)ｗｉｔｈｘ∈Ｒｎ.Ｈｅｒｅｆｏｒｄｉｓｔｉｎｃｔｖａｌｕｅｓｏｆｔｈｅｖｅｃｔｏｒｓｂｉ,ｅａｃｈｏｆｔｈｅｓｅｆｕｎｃｔｉｏｎｓｈａｓａｄｉｆｆｅｒｅｎｔｍｉｎ… 相似文献
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1 Ｉｎｔｒｏｄｕｃｔｉｏｎ ＬｅｔＸ ,ＹｂｅｔｗｏＨｉｌｂｅｒｔｓｐａｃｅｓａｎｄｌｅｔＡ∈Ｂ(Ｘ ,Ｙ) ,ｉ .ｅ .,ａｂｏｕｎｄｅｄｌｉｎｅａｒｏｐｅｒａｔｏｒ .ＣｏｎｓｉｄｅｒｔｈｅｏｐｅｒａｔｏｒｅｑｕａｔｉｏｎＡｘ =ｙ (1.1)ＩｆＲ(Ａ) ,ｉ .ｅ .,ｔｈｅｒａｎｇｅｏｆＡ ,ｉｓｎｏｎ ｃｌｏｓｅｄｉｎＹ ,Ｅｑ .(1.1)ｉｓｉｌｌ ｐｏｓｅｄ[1] .Ｍａｎｙｉｍｐｏｒｔａｎｔｐｒｏｂｌｅｍｓｉｎａｐｐｌｉｅｄｓｃｉｅｎｃｅｓ ,ｅｓｐｅｃｉａｌｌｙｉｎｖｅｒｓｅｐｒｏｂｌｅｍｓ ,ｒｅｓｕｌｔｉｎｔｈｉｓｋｉ… 相似文献
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1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ｓｉｎｃｅｔｈｅ 90’ｓ ,ｔｈｅｆｅｍｔｏｓｅｃｏｎｄｌａｓｅｒｔｅｃｈｎｉｑｕｅｓｈａｖｅｂｅｅｎｕｓｅｄｔｏｓｔｕｄｙｖａｒｉｏｕｓｕｌｔｒａ ｐｒｏｃｅｓｓｗｉｔｈｉｎｍａｔｅｒｉａｌｓ,ｂｅｃａｕｓｅｏｆｉｔｓｈｉｇｈｔｉｍｅ ｒｅｓｏｌｕｔｉｏｎ .Ｉｎｃｈｅｍｉｃａｌｒｅａｃｔｉｏｎｓ ,ｃｈｅｍｉｃａｌｂｏｎｄｂｒｅａｋｉｎｇｏｒｂｏｎｄｆｏｒｍａｔｉｏｎｉｓｏｎｔｈｅｓｃａｌｅｏｆｆｅｍｔｏｓｅｃｏｎｄ (10 - 15ｓｅｃ ｏｎｄ) [1] .Ｗｉｔｈｆｅｍｔｏｓｅｃｏｎ… 相似文献
10.
1 Ｉｎｔｒｏｄｕｃｔｉｏｎ Ａ .Ｍ .Ｗ .Ｇｌａｓｓｈａｓｓｈｏｗｎｔｈｅｆｒｅｅｌ ｇｒｏｕｐＦη ｏｆｍｏｓｔｉｎｆｉｎｉｔｅｒａｎｋηｔｏｂｅｉｓｏｍｏｒｐｈｉｃｔｏａｄｏｕｂｌｙｔｒａｎｓｉ ｔｉｖｅｌ ｓｕｂｇｒｏｕｐｏｆｔｈｅｌ ｐｅｒｍｕｔａｔｉｏｎｇｒｏｕｐＡ(Ｑ) [1,2 ] .Ｓ .Ｈ .ＭｃＣｌｅａｒｙｈａｓｐｒｏｖｅｄｔｈａｔｔｈｅｆｒｅｅｌ ｇｒｏｕｐＦηｏｆｆｉｎｉｔｅｒａｎｋηｈａｖｅｐｏｓｓｅｓｓｅｄａｆａｉｔｈｆｕｌｌｙ 2 ｔｒａｎｓｉｔｉｖｅｒｅｐ ｒｅｓｅｎｔａｔｉｏｎｏｎｔｈ… 相似文献
11.
郑光宇 《喀什师范学院学报》2005,26(6):48-50
研究了西瓜花叶病毒-2新疆株（Watermelon mosaic virus-2-XJ,WMV-2-XJ）感染抗性不同的甜瓜品种后苯丙氨酸解氨酶和叶绿素含量的变化.与健康对照植株相比,受感染植株的酶活性均有所增高,但抗性品种“新玉”增高的幅度是感性品种“网纹香”的2倍,酶活性峰早出现12天,即抗性品种酶活性增高幅度大,酶活性峰出现早,叶绿素的变化则与抗性呈负相关,抗性品种“新玉”受WMV-2-XJ感染后的叶绿素含量与健康对照差异不大,而感性品种“网纹香”的叶绿素含量则比健康对照下降了62.9%.苯丙氨酸解氨酶和叶绿素含量的变化均与甜瓜品种对WMV-2-XJ的抗性呈现规律性的相关性,这种规律性可用于甜瓜品种对WMV-2-XJ 抗性鉴定的生物化学分析. 相似文献
12.
干旱和盐胁迫对小麦过氧化物同工酶的影响 总被引：2，自引：0，他引：2
采用聚丙烯酰胺凝胶垂直板电泳法,对干旱和盐胁迫下的小麦根、叶进行过氧化物同工酶分析．结果表明：小麦根和叶过氧化物同工酶谱有较大差异。在干旱和盐胁迫下,根部过氧化物同工酶活性升高,但没有酶带的变化;叶片中过氧化物同工酶活性降低,且盐胁迫后叶片中少了一条酶带． 相似文献
13.
Transient expression of chicken alpha interferon gene in lettuce 总被引：1，自引：0，他引：1
We investigated the possibility of producing chicken alpha interferon (ChIFN-α) in transgenic plants.The cDNA encoding ChIFN-a was introduced into lettuce (Lactuca sativa L.) plants by using an agro-infiltration transient expression system.The ChIFN-α gene was correctly transcribed and translated in the lettuce plants according to RT-PCR and ELISA assays.Re-combinant protein exhibited antiviral activity in vitro by inhibition of vesicular stomatitis virus (VSV) replication on chicken embryonic fibroblast (CEF).The results demonstrate that biologically active avian cytokine with potential pharmaceutical ap-plications could be expressed in transgenic lettuce plants and that it is possible to generate interferon protein in forage plants for preventing infectious diseases of poultry. 相似文献
14.
为探索木质素的生物降解新途径，采用平板显色法从三株白腐真菌中筛选出一株灵芝属漆酶高产菌，以农作物秸秆等为培养基进行固态发酵，该菌主要产漆酶和少量木质素过氧化物酶．在优化条件下，该菌发酵18d，漆酶活力最高达2056U／g干曲．该菌以玉米秸秆、油菜秸秆及稻草作为唯一营养源固态发酵30d，对玉米秸秆的木质素降解率最大，达到23．7％，油菜秸秆也达到了16．2％． 相似文献
15.
Cheng-qi Yan Kai-xian Qian Gang-ping Xue Zhong-chang Wu Yue-lei Chen Qiu-sheng Yan Xue-qing Zhang Ping Wu 《浙江大学学报(A卷英文版)》2004,5(10):1199-1205
Novel bacterial blight (BB) resistance gene(s) for rice was (were) introduced into a cultivated japonica rice variety Oryza sativa (cv. 8411), via somatic hybridization using the wild rice Oryza meyeriana as the donor of the resistance gene(s). Twenty-nine progenies of somatically hybridized plants were obtained. Seven somatically
hybridized plants and their parents were used for AFLP (amplified fragment length polymorphism) analysis using 8 primer pairs.
Results confirmed that these plants were somatic hybrids containing the characteristic bands of both parents. The morphology
of the regenerated rice showed characters of both O. sativa and O. meyeriana. Two somatic hybrids showed highest BB resistance and the other 8 plants showed moderate resistance. The new germplasms with
highest resistance have been used in the rice breeding program for the improvement of bacterial blight resistance.
Project (No. 98001) supported by Ningbo Agriculture Key Scientific Research Foundation, China 相似文献
16.
一定条件下,培养黄孢原毛平革菌合成本素过氧化物酶.研究黄孢原毛平革菌培养液及其粗酶液对几种染料的降解能力,结果表明有明显的脱色作用,木素过氧化物酶的降解能力的大小与酶活大小、H_O_2浓度、染料浓度、温度、pH等条件有一定的关系。 相似文献
17.
Measurement of the thermal transport properties of dielectric thin films using the micro-Raman method 总被引：1，自引：0，他引：1
The micro-Raman method is a non-contact and non-destructive method for thermal conductivity measurement. To reduce the measurement error induced by the poor fit of the basic equation of the original micro-Raman method, we developed a new basic equation for the heat source ofa Gaussian laser beam. Based on the new basic equation, an analytical heat transfer model has been built to extend the original micro-Raman method to thin films with submicrometer- or nanometer-scale thickness. Experiments were performed to measure the thermal conductivity of dielectric thin films with submicrometer- or nanometer-scale thickness. The thermal resistance of the interface between dielectric thin films and their silicon substrate was also obtained. The obtained thermal conductivity of silicon dioxide film is 1.23 W/（m.K）, and the interface thermal resistance between silicon dioxide film and substrate is 2.35×10^-8 m^2.K/W. The thermal conductivity and interface thermal resistance of silicon nitride film are 1.07 W/（m.K） and 3.69×10^-8 m^2.K/W, respectively. The experimental results are consistent with reported data. 相似文献
18.
Leaf senescence is often caused by water deficit and the chimeric gene PSA612-1PT is an auto-regulated gene delaying leaf senescence. Using in vitro leaf discs culture system, the changes of contents of chlorophylls, carotenoids, soluble protein and thiobarbituric acid reactive substance （TBARS） and antioxidant enzymes activities were investigated during leaf senescence of PSA612-1PT modified gerbera induced by osmotic stress compared with the control plant （wild type）. Leaf discs were incubated in 20%, 40% （w/v） polyethylene glycol （PEG） 6 000 nutrient solution for 20 h under continuous light [ 130 μmol/（m^2·s）]. The results showed that the contents of chlorophylls, carotenoids and soluble protein were decreased by osmotic stress with the decrease being more pronounced at 40% PEG, but that, at the same PEG concentration the decrease in the transgenic plants was significantly lower than that in the control plant. The activities of superoxide dismutase （SOD）, catalases （CAT）, ascorbate peroxidase （APX）, guaiacol peroxidase （GPX） and dehydroascorbate reductase （DHAR） were stimulated by PEG treatment. However, the increases were higher in PSA612-IPT transgenic plants than in the control plants, particularly at 40% PEG treatment. Lipid peroxidation （TBARS content） was increased by PEG treatment with the increase being much lower in transgenic plant than in the control plant. It could be concluded that the increases in the activities ofantioxidant enzymes including SOD, CAT, APX, GPX and DHAR were responsible for the delay of leaf senescence induced by osmotic stress. 相似文献
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The effect of Al and Cd on the growth, photosynthesis, and accumulation of Al, Cd and plant nutrients in two soybean genotypes were determined using hydroponic culture. There were six treatments: pH 6.5; pH 4.0; pH 6.5 1.0 μmol/L Cd; pH 4.0 1.0 μmol/L Cd; pH 4.0 150 μmol/L Al; pH 4.0 1.0 μmol/L Cd 150 μmol/L Al. The low pH (4.0) and Al treatments caused marked reduction in root length, shoot height, dry weight, chlorophyll content (SPAD value) and photosynthetic rate. Al-sensitive cv. Zhechun 2 accumulated comparatively more Al and Cd in plants than Al-tolerant cv. Liao 1. Compared with pH 6.5, pH 4.0 resulted in significant increase in Cd and Al concentration in plants. Combined application of Cd and Al enhanced their accu-mulation in roots, but caused a reduction in shoots. The concentrations of all 10 nutrients (P, K, Ca, Mg, Fe, Mn, Cu, Zn and B), except Mo were also increased when plants were exposed to pH lower than pH 6.5. Al addition caused a reduction in the con-centration of most nutrients in plant roots and shoots; but K, Mn and Zn in roots were increased. Treatments with Cd alone or together with Al reduced the concentrations of all the plant nutrients in plants. Al-sensitive genotype Zhechun 2 has lower nutrient concentration than Al-tolerant genotype Liao 1. The current findings imply that Al and Cd are synergistic in their effect on plant growth, physiological traits and nutrient uptake. 相似文献