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Search Results: 1 - 10 of 33348 matches for " LUO Zi-sheng "
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Effect of GA3 on ripening and cell wall component metabolism of persimmon fruit
GA3对柿果实成熟软化及细胞壁组分代谢的影响

LUO Zi-sheng,
罗自生

浙江大学学报(农业与生命科学版) , 2006,
Abstract: 为探讨柿果实软化机理和延缓成熟软化的技术措施,以扁花柿为试材,研究了20℃下50 mg?kg-1的GA3处理对采后柿果实成熟软化和细胞壁组分代谢的影响.结果表明:GA3处理不但推迟柿果实呼吸高峰和乙烯高峰的出现,而且还抑制了柿果实PE、PG和-βGal酶活性的增加,延缓纤维素和原果胶降解以及水溶性果胶含量增加,保持果肉硬度.表明GA3可延缓柿果实的软化进程,延长贮藏期限.
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,
罗自生
,席玙芳

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.
Effect of CA storage on active oxygen metabolism in Chinese bayberry fruit
充氮贮藏对杨梅采后活性氧代谢的影响

XI Yu-fang,LUO Zi-sheng,CHENG Du,XU Cheng,WANG Yi-guang,
席芳
,罗自生,程度,徐程,王益光

浙江大学学报(农业与生命科学版) , 2001,
Abstract: Chinese Bayberry Fruit storaged in 85% N2 delayed the activities declination of Superoxide dismutase(SOD)、Ascorbate peroxidase(APX) and Glutathione reductase(GR) and maintained them at high level . Not only Malondialdehyde(MDA) was hold in a low level, but also the producing rate of active oxygen product rate was inhibited.
Determination of Phospholipid in the Peroxisomal Membrane of Rat Liver by High Performance Liquid Chromatography
高效液相色谱法测定大鼠肝过氧化物酶体膜磷脂

JIANG Qiu-fen,LUO Zi-sheng,LI Xing-fa,JIANG Ling-ling,
姜秋芬
,骆子生,李兴发,姜玲玲

色谱 , 2000,
Abstract: A method was employed for the determination of phospholipid in membrane of peroxisomes by high performance liquid chromatography. The separation was performed on a mu-Porasil Si60 column(250 mm x 4.6 mm i.d.) by gradient elution. The phospholipids were detected at 205 nm. The limits of detection for cardiolipin, phosphatidylinositol, phosphatidylserine, phosphatidylethanolamine, phosphatidylcholine and sphingomyelin were 12, 8, 23, 4, 23 and 7 ng respectively and the recoveries were between 84% and 103%. The linear relationship of calibration curves was good (r > 0.91). The phospholipids in peroxisomal membrane of 10 SD rat liver were determined and the results are satisfactory.
A STUDY ON THE DYNAMIC BALANCE OF TOTAL CULTIVATED LAND AMOUNT IN THE PROVINCE OF MOUNTAIN REGION ON THE BASIS OF SUSTAINABLE DEVELOPMENT-TAKING YUNNAN PROVINCE AS AN EXAMPLE
基于可持续发展的山区省份耕地总量动态平衡研究

YANG Zi-sheng,
杨子生

资源科学 , 2001,
Abstract: To maintain dynamic balance of total cultivated land amount is the core of drawing up or revising the overall land use planning in China at present. On the basis of analysing the cultivated land suitability of Yunnan Province, this paper views from the angle of sustainable development that to maintain dynamic balance of total cultivated land amount in the province of mountain region should refer to maintaining dynamic balance of net "suitable cultivated land" amount, the cultivated land on steep slopes must not be included in the scope of "dynamic balance of total cultivated land amount". The paper analyses and draws up the dynamic balance planning of total cultivated land amount in Yunnan Province (including balance of cultivated land amount and quality, and the balance of per capita available farm produce), and puts forward countermeasures on maintaining the dynamic balance of total cultivated land amount in the province of mountain region.
Preparation of Silica Hollow Microspheres with Special Surface Morphology by Biotemplate Method
CAO Feng,LI Dong-Xu,GUAN Zi-Sheng
无机材料学报 , 2009, DOI: 10.3724/sp.j.1077.2009.00501
Abstract: Surface structured silica hollow microspheres were synthesized using the rape pollen grain as a biotemplate via a facile sol-gel method and a succedent calcinations process. Different surface morphologies were also achieved on the as-prepared silica microspheres by changing the ratio of tetraethyl orthosilicate (TEOS) to water in the silica sols. Differential scanning calorimetry (DSC), thermogravity (TG), energy disperse spectroscope (EDS) and scanning electron microscope (SEM) were used to characterize the pollen grain and the as-prepared silica hollow microspheres. The mechanism of morphology controlling in the microspheres fabrication was discussed in detail. The results indicate that the intine of pollen grain will be removed totally at 200 as a consequence hollow structure can be achieved in pollen grain. And the exine of pollen grain with the neta2like morphology can be maintained under higher temperature, which makes the replication of the microstructure on microspheres surface possible. Along with quantity of colloidal particles deposited on pollen grain, the special surface morphology on the silica hollow microspheres will be adjustable.
鄂尔多斯盆地北部延安组白色砂岩形成的稳定同位素示踪及其地质意义
Stable isotope tracing on the formation of white sandstone in Yanan Group, northern Ordos Basin, and its geological significance.

吴柏林, 魏安军, 刘池洋, 宋子升, 胡亮, 王丹, 寸小妮, 孙莉, 罗晶晶
TUN Bai-Lin
, WEI An-Jun, LIU Che-Xiang, SONG Zi-Sheng, HU Liang, WANG Dan, CUN Xiao-Ni, SUN Chi, LUO Jing-Jing

- , 2015, DOI: 10.13745/j.esf.2015.03.018
Abstract: 鄂尔多斯盆地东北部延安组顶部存在大规模的白色砂岩,形成当地的大型高岭土矿床。该白色砂岩与东胜—杭锦旗一带发现的大型砂岩铀矿含矿层位直罗组相邻相近;研究表明白色化与铀矿的富集保存、控矿砂岩的绿色蚀变、碳酸盐化等空间关系密切,成因相似,均与盆地中部上古生界天然气向北运移耗散所导致的低温气水热液流体中烃类还原的流岩作用有关。文中重点从稳定同位素示踪白色砂岩形成的地球化学成因机制和过程,同时也指示了本区存在天然气耗散的动力学背景。高岭石氢氧同位素揭示白色化砂岩形成的高岭土矿床成因以低温热液作用为主,与东胜铀矿形成的低温热液作用为同一性质及事件;高岭石硅同位素与铀矿石中铀矿物铀石的硅同位素数据相近,而与成岩作用黏土的硅同位素特征相去甚远,进一步证明了白色砂岩与铀矿化是在同一低温热液事件作用下的产物。碳氧同位素说明白色砂岩形成的流体与有机质来源有关,结合东胜砂岩铀矿有机地球化学及本区天然气耗散地质事件的背景,认为该有机质来源于向北耗散的上古生界天然气。方解石包裹体氢氧同位素特征表明,流体中水的性质和来源为大气降水。系统总结和综合以上认识认为,本区白色砂岩的形成过程是,中部上古生界低温天然气向北运移耗散至浅部延安组—直罗组,与地下水一起构成低温“天然气水”混合热液,该低温热液的烃类还原作用同时导致了本区延安组顶部白色砂岩的形成以及直罗组下部东胜铀矿的富集保存、砂岩的绿色化和碳酸盐化等蚀变现象,从而形成本区东胜超大型铀矿及大型高岭土矿床和相关的烃类还原蚀变现象,构成现今多种能源及相关资源同盆共存、共荣的局面。
Catalysis over zinc-incorporated berlinite (ZnAlPO4) of the methoxycarbonylation of 1,6-hexanediamine with dimethyl carbonate to form dimethylhexane-1,6-dicarbamate
Da-Lei Sun, Jian-Ru Deng, Zi-Sheng Chao
Chemistry Central Journal , 2007, DOI: 10.1186/1752-153x-1-27
Abstract: The XRD characterization identified a berlinite structure associated with both the AlPO4 and ZnAlPO4 catalysts. The FT-IR result confirmed the incorporation of zinc into the berlinite framework for ZnAlPO4. The XPS measurement revealed that the zinc ions in the ZnAlPO4 structure possessed a higher binding energy than those in ZnO, and as a result, a greater electron-attracting ability. It was found that ZnAlPO4 catalyzed the formation of dimethylhexane-1,6-dicarbamate from the methoxycarbonylation of HDA with DMC, while no activity was detected on using AlPO4. Under optimum reaction conditions (i.e. a DMC/HDA molar ratio of 8:1, reaction temperature of 349 K, reaction time of 8 h, and ZnAlPO4/HDA ratio of 5 (mg/mmol)), a yield of up to 92.5% of dimethylhexane-1,6-dicarbamate (with almost 100% conversion of HDA) was obtained. Based on these results, a possible mechanism for the methoxycarbonylation over ZnAlPO4 was also proposed.As a heterogeneous catalyst ZnAlPO4 berlinite is highly active and selective for the methoxycarbonylation of HDA with DMC. We propose that dimethylhexane-1,6-dicarbamate is formed via a catalytic cycle, which involves activation of the DMC by a key active intermediate species, formed from the coordination of the carbonyl oxygen with Zn(II), as well as a reaction intermediate formed from the nucleophilic attack of the amino group on the carbonyl carbon.Organic carbamates are important raw materials and/or intermediates in the production of fine chemicals [1], such as pesticides, herbicides, pharmaceuticals and dyestuffs [2,3], in addition to being employed as amine protecting groups in organic synthesis [1] and linkers in combinatorial synthesis [1,4].The conventional process for the production of organic carbamates is based mainly on the reaction between alcohols and toxic isocyanates [5]. This approach is not environmentally friendly, because of the need to input high amounts of energy, the use of toxic phosgene as a raw material and also th
Preparation of Silica Hollow Microspheres with Special Surface Morphology by Biotemplate Method
生物模板法制备具有特殊表面形貌的二氧化硅中空微球

CAO Feng,LI Dong-Xu,GUAN Zi-Sheng,
曹 丰

无机材料学报 , 2009,
Abstract: 利用油菜花粉作为生物模板,通过溶胶在花粉颗粒表面包裹,再经高温烧结去除花粉颗粒的方法制备了具有特殊表面形貌的二氧化硅中空微球. 并通过调节溶胶中醇盐与水的比例,实现了不同表面形貌的二氧化硅中空微球的制备. 利用差热(DSC)、热重(TG)、X射线能谱仪(EDS)、扫描电子显微镜(SEM)等对花粉颗粒和所制备的二氧化硅中空微球进行了表征,并对不同表面形貌的形成机理进行了探讨. 结果表明,花粉内壁在200℃时即可完全消除,从而形成中空结构,而外壁及其表面的网格状结构在较高温度仍能保持完好,从而保证该结构在微球表面的复制,而溶胶浓度则是形成微球表面不同形貌的决定因素,随着胶体粒子在花粉表面沉积量的不同,微球表面的微孔结构也将随之变化.
New Progress and Its Prospects of Land Resources Sciences Research in China
我国土地资源学研究新进展及其展望

LIU Yan-sui,YANG Zi-sheng,
刘彦随
,杨子生

自然资源学报 , 2008,
Abstract: 土地资源学是研究土地资源的形成与演变过程、分类与分布规律、数量与质量评价,以及土地资源开发、利用、保护与管理的一门综合性学科。近些年来,我国在土地调查、土地评价、土地整理、土地可持续利用、土地利用规划与资源战略、土地利用优化配置与集约利用、土地资源安全与生态友好型土地利用模式等专业领域取得了显著进展。论文着重分析土地资源学科研究的新进展,对近年来我国土地资源学科最新成果及其在国民经济与社会发展中的应用、成效和前景进行评析,对我国土地资源学科发展趋势进行展望,提出新时期土地资源学研究的主要方向和重点领域。
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