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山羊毛提取L-胱氨酸杂质源及其除杂工艺 被引量:2
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作者 熊洁羽 王国军 《氨基酸和生物资源》 CAS 2002年第3期52-54,共3页
山羊毛提取L 胱氨酸过程中伴有上百种有机类、无机类杂质的形成 ,分析杂质的形成过程及其对胱氨酸收率和产品质量的影响 ,采用料毛物理化学法除杂、活性炭两次脱色、三次中和重结晶除杂工艺 ,杂质除净率高 ,L 胱氨酸产品质量达HG 2 0 30... 山羊毛提取L 胱氨酸过程中伴有上百种有机类、无机类杂质的形成 ,分析杂质的形成过程及其对胱氨酸收率和产品质量的影响 ,采用料毛物理化学法除杂、活性炭两次脱色、三次中和重结晶除杂工艺 ,杂质除净率高 ,L 胱氨酸产品质量达HG 2 0 30 - 91优质品标准。 展开更多
关键词 山羊毛 提取 L-胱氨酸 杂质源 除杂工艺
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化合物半导体的固态杂质源激光诱导扩散的研究
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作者 叶玉堂 《光电子.激光》 EI CAS CSCD 1997年第A10期48-48,51,共2页
1.研究内容本项目研究了以GaAs为衬底的固态杂质源激光诱导扩散。①半导体基片上微小高温区(即激光诱导扩散中的曝光区,直径10μm量级)温度的不接触实时测量。②激光诱导扩散装置的研制及扩散工艺的研究。扩散用的材料是进口含Zn的SiO_... 1.研究内容本项目研究了以GaAs为衬底的固态杂质源激光诱导扩散。①半导体基片上微小高温区(即激光诱导扩散中的曝光区,直径10μm量级)温度的不接触实时测量。②激光诱导扩散装置的研制及扩散工艺的研究。扩散用的材料是进口含Zn的SiO_2乳胶液。扩散前先用它在N型GaAs衬底的表面制成胶膜。在激光诱导扩散中,此胶膜起双重作用:一是为高蒸气压的As原子提供一层密封膜,以阻止GaAs衬底的分解;二是作为掺入GaAs的Zn原子的源(所谓'固态杂质源')。用光功率密度合适的激光束照射制备好含Zn的SiO_2胶膜的样品,在激光辐照区就会产生Zn向GaAs衬底的扩散。 展开更多
关键词 化合物半导体 固态杂质源 激光诱导扩散
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高铝瓷的杂质呈色原因初探
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作者 史庆铎 《火花塞与特种陶瓷》 1997年第4期34-37,共4页
叙述了高铝瓷中存在的微量杂质的呈色原因,揭示了铝瓷红斑的成因探讨了着色陶瓷及其杂质呈色的机理。
关键词 陶瓷 高铝瓷 红斑 杂质源 呈色机理
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新型高铝承烧座的研制
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作者 史庆铎 《火花塞与特种陶瓷》 1998年第1期30-33,共4页
简介了软磁铁氧体制品高温烧成时使用承烧座的情况;着叙述了QL牌新型高铝承烧座的研制过程及其使用效果;探讨了承烧座对高温烧成软磁铁氧体制品接触部位表面污染、腐蚀反应的原因,条件及其规律性。
关键词 软磁铁氧体 承座 腐蚀反应 杂质源 粉末冶金
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Germplasm Resource Innovation and Breeding Direction of Castor 被引量:1
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作者 张宝贤 王光明 +3 位作者 刘红光 谭德云 刘婷婷 孙慧博 《Agricultural Science & Technology》 CAS 2013年第1期40-43,115,共5页
Castor is dicotyledonous annual or perennial herb, which is originally pro- duced in eastem Africa, and successively introduced to Asia, America and Europe. Because of wide adaptability and high survival rate, it is w... Castor is dicotyledonous annual or perennial herb, which is originally pro- duced in eastem Africa, and successively introduced to Asia, America and Europe. Because of wide adaptability and high survival rate, it is widely grown in various countries, being one of the world's ten most important oil crops. Castor has very wide application range, which is recognized as the most promising plant oil in deep processing instead of oil. It has very high development and utilization value, and has been paid attention by a large number of researches. However, the current interna- tional castor seed breach is serious, so the development and utilization of castor in- dustry is restricted. Castro breeding research in China began in early 1950s. Cur- rently, castor breeding technology and variety yield level in China have reached in- ternational advanced level. Although great improvement has been made, there still have space in many ways. Based on long-term castor breeding practice, the paper discusses the feasibility and importance of using wild resources, native variety and imported varieties to improve and innovate germplasm resources of castor, and breed disease-resistant inbred lines and hybrids. According to regional characteristics of castor cultivation in China, the main breeding objectives including high yield and high oil, suitable for mechanized cultivation, high resistance and strong stress toler- ance are put forward in the paper. 展开更多
关键词 CASTOR Germplasm resource HYBRID
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Advanced prediction for multiple disaster sources of laneway under complicated geological conditions 被引量:5
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作者 Wang Bo Liu Shengdong +2 位作者 Liu Jing Huang Lanying Zhao Ligui 《Mining Science and Technology》 EI CAS 2011年第5期749-754,共6页
The driving safety in the laneway is often controlled by multiple disaster sources which include fault fracture zone, water-bearing body, goaf and collapse column. The advanced prediction of them has become a hotspot.... The driving safety in the laneway is often controlled by multiple disaster sources which include fault fracture zone, water-bearing body, goaf and collapse column. The advanced prediction of them has become a hotspot. Based on analysis of physical characteristics of the disaster sources and comparative evaluation of accuracy of the main advanced geophysical detection methods, we proposed a comprehen- sive judging criterion that tectonic interface can be judged by the elastic wave energy anomaly, strata water abundance can be discriminated by apparent resistivity response difference and establish a reason- able advanced prediction system. The results show that the concealed disaster sources are detected effec- tively with the accuracy rate of 80% if we use advanced prediction methods of integrated geophysics combined with correction of seismic and electromagnetic parameters, moreover, applying geological data, we may then distinguish types of the disaster sources and fulfill the qualitative forecast. Therefore, the advanced prediction system pays an important referential and instructive role in laneway driving project. 展开更多
关键词 Mine lanewayMultiple disaster sourcesPrediction systemAccuracy rateQualitative forecast
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Increasing yield potential of hybrid rice through molecular breedingIncreasing yield potential of hybrid rice through molecular breeding
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作者 Deng Qiyun Yuan Longping +6 位作者 Liang Fengshan Zhuang Wen Li Jiming Wang Yueguang Duan Meijuan Xiong Yuedong Wang Bin 《Agricultural Science & Technology》 CAS 2005年第3期7-12,共6页
Rice is the staple food for more than half of the world population. The utilization of the wild abortive cytoplasmic male sterility (CMS) in 1970s has significantly raised rice yield potential. But the world's annu... Rice is the staple food for more than half of the world population. The utilization of the wild abortive cytoplasmic male sterility (CMS) in 1970s has significantly raised rice yield potential. But the world's annual rice production will have to increase 70 percent over the next 30 years, to keep up with the demends of the growing population. 展开更多
关键词 crop yield GENES genetic markers HETEROSIS HYBRIDS plant breeding rice wild relatives
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Complexity scalable control algorithm for intra coding in H.264 under energy constraints
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作者 Gao Xuejun Lam Kin Man +1 位作者 ZhuoLi ShenLansun 《High Technology Letters》 EI CAS 2010年第3期274-279,共6页
In this paper, the complexity of intra coding is first analyzed so as to achieve a weight of complexity measurement for each intra mode. Then, a new complexity scalable control algorithm for intra coding in H. 264 is ... In this paper, the complexity of intra coding is first analyzed so as to achieve a weight of complexity measurement for each intra mode. Then, a new complexity scalable control algorithm for intra coding in H. 264 is proposed, based on the rearrangement of the order of candidate modes and an efficient complexity allocation and control (CAAC) scheme at the macroblock (MB) level. The candidate modes of each MB are rearranged according to the local-edge information. Experimental results show that our proposed algorithm can make an appropriate cut-off point of the candidate modes sequence adaptively according to the current energy condition of a mobile device, so as to adjust the complexity at any level while maximizing the video quality, which can prolong the operational lifetime of the battery with minimum degradation in video quality. 展开更多
关键词 complexity scalable control complexity allocation rearrangement of candidate modes intra coding H. 264 energy constraints
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Origin of Particle Spins, Bosons and Fermions, Compounds of Zero Spin Particles, in Complex Spin Region
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作者 Shaoxu Ren 《Journal of Physical Science and Application》 2017年第3期47-58,共12页
This paper shows: Bosons and Fermions maybe the compounds П of two zero spin particles which are spin-conjugates each other in complex region. There are two kinds of spin-conjugates of zero spin particle: real spin... This paper shows: Bosons and Fermions maybe the compounds П of two zero spin particles which are spin-conjugates each other in complex region. There are two kinds of spin-conjugates of zero spin particle: real spin-conjugate (πReal,π) and imaginary spin-conjugate (πImaginary,π). Using (πReal, π), Bosons and Fermions of Antimatter ПR could be formed, and using (πImaginary,π), Bosons and Fermions of Matter П1 could be formed. 展开更多
关键词 Zero spin particle Casimir Operator real region complex region spin-conjugate real spin-conjugate imaginary spin-conjugate spin-conjugate-composite matter antimatter.
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Design of reactive distillation processes for the production of butyl acrylate:Impact of bio-based raw materials
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作者 Alexander Niesbach Natalia Fink +1 位作者 Philip Lutze Andrzej Górak 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2015年第11期1840-1850,共11页
The chemical industry is nowadays predominantly using fossil raw materials,but the alternative use of bio-based resources is investigated to account for the foreseeable scarcity of fossil feedstocks.A main challenge o... The chemical industry is nowadays predominantly using fossil raw materials,but the alternative use of bio-based resources is investigated to account for the foreseeable scarcity of fossil feedstocks.A main challenge of using biobased feedstocks is the complexity of the impurity profile.For an economic production of bio-based chemicals,the use of intensified processes is inevitable and approaches are needed for the various process intensification techniques to identify their applicability to be used for the production of bio-based components.In the presented study,an approach is shown for the reactive distillation(RD) technology to identify the most critical bio-based impurities and their impact on the reactive distillation process.The investigated case-study is the production of n-butyl acrylate from acrylic acid and n-butanol.Among all initially identified impurities,the key impurities,having the biggest impact on the product purity in the reactive distillation process,are found.These impurities are then studied in more detail and an operating window depending on the impurity concentration is identified for the reactive distillation column.Furthermore,an integrated design of upstream and downstream processes is facilitated,as the presented results can be used in the development of the fermentation processes for the production of the bio-based reactants by decreasing the concentration of the critical impurities. 展开更多
关键词 Biobutanol Acrylic acid Purification Clustering Impurities
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