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1.
ＩＮＴＲＯＤＵＣＴＩＯＮＣｒ4 :ＹＡＧｃｒｙｓｔａｌｓｈａｄｂｅｅｎｗｉｄｅｌｙｕｓｅｄａｓｓａｔｕｒａｂｌｅａｂｓｏｒｂｅｒｓｆｏｒｆｌａｓｈｌａｍｐｐｕｍｐｅｄｏｓｃｉｌ ｌａｔｏｒａｎｄＭＯＰＡｓｙｓｔｅｍｓ (Ｓｈｉｍｏｎｙｅｔａｌ.,1 995,1 996,Ｅｉｃｈｌｅｒ,1 994 ,1 995,Ｙａｎｋｏｖ,1 994 )ａｓｗｅｌｌａｓｉｎｄｉｏｄｅｐｕｍｐｅｄｌａｓｅｒｓ(Ｚａｙｈｏｗｓｋｉｅｔａｌ.,1 994 ) .Ｔｈｅｙｐｒｅｓｅｎｔｅｄａｎｅａｓｙｗａｙｔｏｇｅｎ ｅｒａｔｅｐａｓｓｉｖｅｌｙＱ ｓｗｉｔｃｈｅｄｌａｓｅ… 相似文献
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MIRROR EXTENDING AND CIRCULAR SPLINE FUNCTION FOR EMPIRICAL MODE DECOMPOSITION METHOD 总被引：43，自引：0，他引：43
ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅＥｍｐｉｒｉｃａｌＭｏｄｅＤｅｃｏｍｐｏｓｉｔｉｏｎ (ＥＭＤ)ｍｅｔｈｏｄａｎｄｉｔｓＨｉｌｂｅｒｔＳｐｅｃｔｒｕｍｔｅｃｈｎｉｑｕｅｉｓａｎｅｗｌｙｄｅｖｅｌｏｐｅｄｍｅｔｈｏｄｆｏｒｔｉｍｅｓｅｒｉｅｓａｎａｌｙｓｉｓ(Ｈｕａｎｇｅｔａｌ.,1 998) .Ｔｈｉｓｍｅｔｈｏｄｉｓｓｕｉｔａｂｌｅｆｏｒａｎａｌｙｚｉｎｇｎｏｎｌｉｎｅａｒａｎｄｎｏｎ ｓｔａｔｉｏｎａｒｙｐｒｏ ｃｅｓｓｂａｓｅｄｏｎａｎｅｍｐｉｒｉｃａｌａｐｐｒｏａｃｈａｎｄｐｒｏ ｖｉｄｅｓａｐｒｅｃｉｓ… 相似文献
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An incubation study was conducted to investigate the effects of metsulfuron-methyl herbicide on the soil microbial biomass
in loamy sand soil. The herbicide was applied to the soil at four concentrations: control, 0.01, 0.10, and 1.00 μg·g−1 soil. Determinations of microbial biomass-C and microbial biomass-N contents were carried out 1, 3, 5, 7, 10, 15, 25, and
45 days after herbicide application. In comparison to untreated soil, the microbial biomass-C and biomass-N decreased significantly
in soils treated with herbicide at concentrations of 0.1 and 1.0 μg·g−1 soil within the first 7 days of incubation. The application of metsulfuron-methyl herbicide to the soil reduced the Cmic/Corg and Nmic/Ntotal percentages, which decreased with increasing application rate of metsulfuron-methyl herbicide. Compared to the untreated
control, a marked increase in the microbial biomass C: N ratio was observed in the herbicide treated soil. This effect was
transitory and was significant only at the higher rates of metsulfuron-methyl.
Project supported by NSFC (No. 49871044) and the Laboratory of Materials Cycling in Pedosphere, Academia Sinica. 相似文献
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INTRODUCTIONTheimportanceofmicroorganismstosoilfer tilityandsoilqualityhasbeencommonlyaccept ed (Smithetal.,1 990 ;Brookes,1 995;Da lal,1 998;Wicketal.,1 998) .Soilmicrobialbiomassasanimportantmicrobialpropertyhasbeenextensivelystudiedsinceitisthelivingco… 相似文献
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Enhancing the dispersion and dissolution of substrate particles in substrate water suspension is a feasible way to improve steroid bioconversion. The aim of the present study is to investigate the effects of applying surfactant to microbial conversion system on the dispersion, solubilization and in turn bioconversion of steroid substrate. The model system is hydroxylation of substrate 19α- 17α-epoxy- 4-pregnene- 3.2It-dine by microbial enzymes from Rhizopus nigricanl. The results show that the presence of substrate leads to an increase in critical micelle concentration （ CMC） of surfactant PSE compared with the normal CMC of PSE in aqueous solution. The grinding time during substrate suspension preparation affects the substrate aqueous solubility differently with the varied surfactant concentrations while barely making any difference in substrate solubility in the absence of surfactant. The properly prolonged grinding time can make up for the loss in substrate solubility arising from the reduction in surfactant concentration. The surfactant complexes composed of surfactants PSE and MGE at appropriate ratios are screened out with orthodoxy experiment method. the interaction between PSE and MGE exerts the most prominent effects on substrate bioconversion, and the surfactant complexes show more beneficial effects on steroid bioconversion than the surfactant PSE used alone. 相似文献
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ＩＮＴＲＯＤＵＣＴＩＯＮＡｇｒｉｃｕｌｔｕｒａｌａｃｔｉｖｉｔｉｅｓａｎｄｈｕｍａｎｉｎｄｕｓｔｒｉａｌｉｚａｔｉｏｎｉｎｃｒｅａｓｅｒｅｌｅａｓｅｏｆｈｅａｖｙｍｅｔａｌｓｉｎｔｏｔｈｅｅｎｖｉｒｏｎｍｅｎｔ.Ｓｉｎｃｅ,ｈｅａｖｙｍｅｔａｌｓｒｅａｄｉｌｙａｃｃｕｍｕｌａｔｅｉｎｓｏｉｌ,ｔｈｅａｍｏｕｎｔｉｎｓｏｉｌｉｓｌｉｋｅｌｙｔｏｃｏｎｔｉｎｕｅｔｏｉｎｃｒｅａｓｅ.Ｔｈｅｍｅｔａｌｓｉｎｓｏｉｌｈａｖｅｄｅｌｅｔｅｒｉｏｕｓｅｆｆｅｃｔｓｏｎｔｈｅｍｅｔａｂｏｌｉｓｍｏｆｔｈｅｓｏｉｌ… 相似文献
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C++Builder与Microsoft Access在书店管理系统中的应用 总被引：1，自引：0，他引：1
运用国内外较为流行的关系型数据库语言MicrosoftAccess、ODBC技术、SQL语言和C ++Builder语言建立了可视化的书店管理系统 ,解决了功能强大的MicrosoftAccess数据库系统的可视化问题 .所开发的可视化书店管理系统性能安全可靠、界面友好、易于操作 ,在实际应用中收到了良好的效果 . 相似文献
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A laboratory incubation experiment was conducted to study the effect of copper as cupric sulfate (CuSO4.5H2O), and lead as lead acetate (Pb (OAc)2) on the size of the microbial biomass in red soil. The metals were applied, separately at six different levels: Cu at 50,
100, 200, 300, 400, and 600 μg·g−1 soil and Pb at 100, 200, 400, 600, 800, and 1000 μg·g−1 soil. In comparison to uncontaminated soil, the microbial biomass carbon (Cmic) and biomass nitrogen (Nmic) decreased sharply in soils contaminated with Cu and Pb. The microbial biomass C:N ratio in the metal contaminated soil was
observed to be considerably higher than that in untreated control. Between the two tested metals, Cu displayed greater biocidal
effect on microbial biomass carbon and nitrogen than Pb, showing their relative toxicity in the order: Cu≫Pb.
Project (No. 49671050) supported by National Natural Science Foundation of China.
Wa’el Mohamad—Former Ph. D. Student of Zhejiang University and is working in Ministry Of Agriculture (P. O. box. 2099), Amman,
Jordan. 相似文献
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ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｐｕｒｐｏｓｅｏｆｔｈｉｓｗｏｒｋｉｓｔｏｉｎｖｅｓｔｉｇａｔｅｔｈｅｂａｃｋｗｅｌｌｐｏｓｅｄｎｅｓｓｏｆａｎｏｎｕｎｉｆｏｒｍｂｅａｍｅｑｕａｔｉｏｎｗｉｔｈｂｏｕｎｄａｒｙｃｏｎｔｒｏｌｓ.Ｉｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔｉｆｔｈｅｃｒｏｓｓ ｓｅｃｔｉｏｎｄｉｍｅｎｓｉｏｎｓｏｆｔｈｅｂｅａｍｉｓｎｏｔｎｅｇｌｉｇｉｂｌｅｃｏｍｐａｒｅｄｗｉｔｈｉｔｓｌｅｎｇｔｈ ,ｔｈｅｎｉｔｉｓｎｅｃｅｓｓａｒｙｔｏｃｏｎｓｉｄｅｒｔｈｅｅｆｆｅｃｔｏｆｔｈｅｒｏｔａｔｏ… 相似文献
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以均苯三酰胺甘氨酸与Tb(NO3)3.6H2O为原料,加入到乙醇和水为1:1的溶液中,滴加吡啶调节溶液的pH值,密封静置反应,两周后生成无色晶体。通过荧光光谱、红外光谱、XRD和元素分析等手段对化合物进行了表征,表明化合物为[Tb(TCMBT)].7H2O。 相似文献
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PREPARATION AND CHARACTERISTICS OF NEW TYPE NANOCOMPOSITE POWDER 总被引：4，自引：0，他引：4
ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅａｕｔｈｏｒ’ｓｐａｓｔｒｅｓｅａｒｃｈｅｓｓｈｏｗｅｄｔｈａｔｅｌｅｃｔｒｏｌｅｓｓ ｐｌａｔｅｄｍｅｔａｌ ｃｅｒａｍｉｃｃｏｍｐｏｓｉｔｅｐｏｗ ｄｅｒｃｏｕｌｄｒｅｔａｒｄｃｅｒａｍｉｃｇａｉｎｇｒｏｗｔｈｄｕｒｉｎｇｔｈｅｓｉｎｔｅｒｐｒｏｃｅｓｓ,ｅｖｅｎｌｙｄｉｓｐｅｒｓｅｔｈｅｍｅｔａｌｌｉｃｐｈａｓｅｏｎｔｈｅｃｅｒａｍｉｃｍａｔｒｉｘａｎｄ ,ｔｈｅｒｅｆｏｒｅ ,ｉｎ ｃｒｅａｓｅｔｈｅｆｒａｃｔｕｒｅｓｔｒｅｎｇｔｈ ,ｔｏｕｇｈｎｅｓｓａｎｄｗｅａｒ… 相似文献
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曹湘萍 《和田师范专科学校学报》2005,25(5):128-129
语言是文化的载体,翻译不仅是语言的转换,更是文化的传真.要在两种语言之间进行翻译,除了要通晓两种语言文字外,还必须深刻理解两种文化之间的差异.本文从风俗习惯、思维方式、审美心理以及宗教信仰与历史典故等几个方面,分析中西方文化的差异与英汉翻译过程中应注意的问题. 相似文献
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AAO工艺出水pH值偏酸问题分析及对策 总被引：1，自引：0，他引：1
某污水处理厂AAO工艺出水存在着pH值偏低的问题。通过对比历史数据和缺氧反硝化试验,研究了以进厂污水作为碳源的反硝化脱氮的能力及碳氮比对脱氮的影响,并通过碱度平衡核算,分析了硝化和反硝化段的情况,查找出了出水碱度不足pH偏酸的原因,提出了快捷、行之有效的控制方案。 相似文献
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微生物对林地土壤的作用 总被引：2，自引：0，他引：2
本文就微生物对林地土壤的作用从土壤微生物生物量的含义、在土壤生态系统中的作用，菌根在森林生态系统中的作用以及根系分泌物对林地根际微环境的作用等几个方面进行了探讨，提出应该充分发挥林地土壤微生物的作用，以促进林业可持续发展。 相似文献
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Gui-xiao LA Ping FANG Yi-bo TENG Ya-juan LI Xian-yong LIN 《Journal of Zhejiang University. Science. B》2009,10(6)
The effects of CO2 enrichment on the growth and glucosinolate (GS) concentrations in the bolting stem of Chinese kale (Brassioa alboglabra L.) treated with three nitrogen (N) concentrations (5, 10, and 20 mmol/L) were investigated. Height,stem thickness, and dry weights of the total aerial parts, bolting stems, and roots, as well as the root to shoot ratio, significantly increased as CO2 concentration was elevated from 350 to 800 μl/L at each N concentration. In the edible part of the bolting stem,11 individual GSs were identified, including 7 aliphatic and 4 indolyl GSs. GS concentration was affected by the elevated CO2 concentration, N concentration, and CO2×N interaction. At 5 and 10 mmol N/L, the concentrations of aliphatic GSs and total GSs significantly increased, whereas those of indolyl GSs were not affected, by elevated atmospheric CO2. However, at 20 mmol N/L,elevated CO2 had no significant effects on the concentrations of total GSs and total indolyl GSs, but the concentrations of total aliphatic GSs significantly increased. Moreover, the bolting stem carbon (C) content increased, whereas the N and sulfur (S) contents decreased under elevated CO2 concentration in the three N treatments, resulting in changes in the C/N and N/S ratios.Also the C/N ratio is not a reliable predictor of change of GS concentration, while the changes in N and S contents and the N/S ratio at the elevated CO2 concentration may influence the GS concentration in Chinese kale bolting stems. The results demonstrate that high nitrogen supply is beneficial for the growth of Chinese kale, but not for the GS concentration in bolting stems, under elevated CO2 condition. 相似文献
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1-N-苯甲酰基-4-氨基-1-氮杂丁二烯在紫外光照射下进行光环化反应,制备了一些文献中未报导过的取代喹啉,全部的新化合物都经元素分析,MS,~1H和~(13)C NMR测定。 相似文献