搜索结果: 1-15 共查到“农业基础学科 structure”相关记录28条 . 查询时间(0.203 秒)
Structure–function relationship of terpenoid glycosyltransferases from plants
植物 萜类糖基 转移酶 UGT76G1
2023/4/19
Terpenoids are physiologically active substances that are of great importance to humans. Their physicochemical properties are modified by glycosylation, in terms of polarity, volatility, solubility an...
山东农业大学生物化学英文课件Section F- DNA structure and replication
山东农业大学 生物化学 英文 课件 Section F DNA structure and replication
2009/12/14
山东农业大学生物化学英文课件Section F- DNA structure and replication。
COMMUNITY COMPOSITION AND TREE POPULATION STRUCTURE IN UNDISTURBED AND DISTURBED TROPICAL SEMI-EVERGREEN FOREST STANDS OF NORTH-EAST INDIA
Dominance Species diversity Floristic composition Forest structure Girth class
2010/3/26
Species composition, density, importance value index, diversity, dominance and tree population
structure were studied in disturbed and undisturbed stands of tropical semi-evergreen forest in Lunglei ...
冻融循环对甲壳素凝聚态结构和脱乙酰反应的影响（Effects of Freezing-thawing Cyclic Treatment on Condensed State Structure and N-deacetylation of Chitin）
甲壳素 冻融循环处理 N-脱乙酰反应
2009/11/3
甲壳素和质量分数为40%的浓NaOH溶液的混合物在-18℃和40℃条件下反复进行冻融处理，结果表明慢速冷冻加低温解冻的冻融循环处理过程中，冰晶的反复形成和重结晶能够破坏甲壳素凝聚态特别是晶态结构。经过3次冻融循环处理，可使甲壳素在NaOH溶液中完全溶解，获得甲壳素最终质量分数为4%，NaOH最终质量分数约为10%的均相溶液，为用均相脱乙酰法制备半脱乙酰水溶性甲壳素提供前提。
Crystalline Structure Properties of Bleached and Unbleached Wheat Straw（Triticum Aestivum L.）Soda-Oxygen Pulp
Cellulose crystallinity index crystallite size pulp wheat straw x-ray
2009/1/13
In this study, the crystallinity index and crystallite size of wheat straw powder, soda-oxygen pulp and soda oxygen pulp bleached with hypochlorite (H) and hypochlorite and peroxide (HP) sequences wer...
Pilot Study for an Assessment of Vegetation Structure for Steppe Rangelands of Central Anatolia
Semiarid steppe-rangelands vegetation-pattern Central Anatolia Redundancy Analysis
2009/1/7
In the last 50 years, rangelands in the Central Anatolian Region of Turkey have been converted to cropping lands, which has negatively accelerated vegetation change, resulting in overgrazing and poor ...
Intersecting-surfaces approach to soil structure
surface- and volume-like objects pores grains aggregates
2008/11/26
The large number of intersecting surfaces in a volume divides the latter into small sub-volumes. Each of the sub-volumes is outlined or nearly outlined by parts of the intersecting surfaces. A number ...
Advantages of application of the backscattered electron scanning image in the determination of soil structure and soil constituents
backscattered electron scanning image soil structure soil components
2008/11/26
Submicroscopic techniques can be broadly subdivided into the study of micromorphology and imaging of the arrangement of the soil particles and voids, and the microchemical analysis of soil components....
Accessibility of most frequently used physical parameters of soil structure, reliability of measured values, lack of replicates andways out of this dilemma
bulk density saturated hydraulic conductivity limited data-sets outflanking techniques
2008/11/26
Assessment of soil structure and still more its changes is impeded by peculiarities of sampling and measurement. Unavoidable local destructions tend to advance use of small numbers of replicates, samp...
Attempt to application of image processing to evaluation of changes in internal structure of wheat grain*
wheat grain weray detection image analysis
2008/11/26
Test experiments have been carried out concerning the application of computer analysis of X-ray images for the assessment of the changes in inner structure of wheat grain subjected to the process of w...
Image analysis as the quantitative estimation of the structure of agricultural materials*
probabilistic micromechanics agricultural materials structure image analysis
2008/11/26
Deformable media which are the objects of interest of agrophysics are distinguished by the fact that they are composed of three phases and each of them clearly pronounce its specific role. Comparing e...
Impact of the long-term straw supply on loess-derived soil structure
plant residues slaking soil structural properties organic matter
2008/11/26
Keeping plant residues on the field and incorporating them instead of removing or burning them, is a well-known practice in soil and water conservation. One of the objectives of this management is to...
Analysis of the interrelation between the heat balance structure, type of plant cover and weather conditions
heat balance evapotranspiration latent heat sensible heat Bowen ratio
2008/11/26
There are many ways of micrometeorological description of the environment. One of them is the analysis of heat balance of an active surface which characterizes very well areas with different plant cov...
Impacts of soil structure on crop growth
soil structure parameters simulation modelling root distribution crop growth
2008/11/24
Intensive agricultural utilisation of soils may change the structural status and through it the credibility and fertility of soils. Since soil structure has not been quantified explicitly, studying st...
Fractal structure of starch extrudates-investigation by small angle x-ray scattering
fractal structure SAX scattering starch extrudates
2008/11/18
Small angle X-ray scattering has been applied to the study of structure of potato starch and wheat flour extrudates. The range changes of microstructure deformation after extrusion cooking processes w...