搜索结果: 1-13 共查到“农学总论 optimization”相关记录13条 . 查询时间(0.14 秒)
Optimization and production of antifungal hydrolysis enzymes by streptomyces aureofaciens against Colletotrichum gloeosporioides of mango
Antifungal Colletotrichum Gloeosporioides
2013/3/4
We isolated naturally occurring actinomycetes with an ability to produce metabolites having antifungal property against, Colletotrichum gloeosporioides, the causal agent of mango anthracnose. One prom...
Research on agricultural search engine optimization
Search engine optimization (SEO) kernel principal component analysis (KPCA)
2011/1/11
Search engine optimization (SEO) has practical significance for promoting farmers income and agricultural efficiency in China.
热激法修饰瑞士乳杆菌的参数优化与特性研究（Parameters Optimization and Properties for Lactobacillus helveticus by Heat-shock Treatment）
瑞士乳杆菌 热激处理 特性
2009/9/11
采用不同热处理温度(67、70℃)与时间(10、15、20s)对瑞士乳杆菌（Lactobacillus helveticus）进行热激修饰，研究处理前后与干酪加工相关的菌体特性，同时对热激修饰条件参数进行优化。研究结果表明，菌体经70℃、10?s热激处理后，菌体存活率、动态产酸能力、蛋白水解能力等指标符合热激要求，经修饰后的菌株适宜作为干酪促熟酶源。采用扫描电镜对细菌表面微观结构的观察结果表明，热...
Transient Expression of Green Fluorescent Protein in Rice Calluses:Optimization of Parameters for Helios Gene Gun Device
Helios gene gun Particle bombardment Rice Synthetic green fluorescent protein Transient expression
2009/7/21
An optimized condition for particle bombardment is necessary for efficient genetic transformation. Parameters for Helios gene gun, the new system for nucleic acid delivery which is mainly consists of...
荔枝在不同红外辐射源下真空干燥优化试验（Optimization Test of Litchi Vacuum Drying under Different Infrared Radiation Sources）
荔枝 红外辐射源 真空
2009/5/22
通过不同红外辐射源真空干燥荔枝试验以及干燥工艺品质试验，表明果肉与辐射源光谱匹配显著影响干燥速率，真空度、辐射热流密度的匹配影响干燥速率及干燥品质；采用辐射源SZ、辐射距离120mm、加热/缓苏时间15min/15min、真空度0.02MPa的干燥工艺，干燥速率与干果品质综合评价最优。
脐橙VC含量近红外光谱消噪小波优化（Wavelet Optimization for Near-infrared Spectra Denoising of Vitamin C Content of Umbilical Orange）
脐橙 近红外光谱 小波基
2009/5/22
运用db1～db10等10个小波基4尺度分解对120个赣州脐橙样品的近红外光谱进行消噪处理，分别建立了各种小波消噪光谱的脐橙维生素C(VC)含量的PLS模型。通过PLS模型预测精度比较表明：所有db小波基变换都能有效消除脐橙VC近红外光谱噪声，PLS模型预测精度均高于不处理光谱建立的模型预测精度。其中，消噪效果最好的小波基是db5，模型预测值与实测值的相关系数R达到0.9427、内部交叉验证均方差...
青钱柳叶总黄酮超声辅助提取工艺优化（Technology Optimization of Total Flavonoids Extraction from Cyclocarya Paliurus Leaves by Ultrasonic Assistance）
青钱柳叶 总黄酮 超声
2009/5/22
为研究以乙醇为溶剂超声波辅助提取青钱柳叶总黄酮的工艺，在单因素试验的基础上，采用四因素二次回归正交旋转组合设计，以液料比、超声处理时间、超声功率、溶剂体积分数为考察因素，优选了超声波辅助提取青钱柳叶总黄酮的最佳工艺。结果表明各因素对提取率的影响大小依次为：超声处理时间、溶剂体积分数、液料比、超声功率。最佳工艺条件为液料比55mL/g，超声处理时间34min，超声功率720W，溶剂体积分数60%，在...
Optimization of vertical alignment of highways utilizing discrete dynamic programming and weighted ground line
Highway alignment Earthwork Optimization Grade line Dynamic programming
2010/3/17
Earthwork optimization plays an important role for reducing the total cost of highway projects. Weighted Ground Line Method (WGLM) is an earthwork optimization technique based on a hypothetical ground...
THE DETERMINATION OF PARAMETERS OF MULTI-STEP ADSORPTION ISOTHERM BY SEQUENTIAL SIMPLEX OPTIMIZATION
Regression model adsorption pesticide soil
2010/3/26
The nutrient and toxic compounds can be adsorbed on the surface of soil colloids. Investigating the adsorption of some pesticide compounds, instead of the simply asymptotic Langmuir isotherm multistep...
Optimization of selenium accumulation in Rhodotorula rubra cells by treatmentof culturing medium with pulse electric field
selenium biomass Rhodotorula rubra pulse electric field
2008/11/13
Electroporation was used as a method for Rhodotorula rubra biomass enrichment in selenium. The highest selenium accumulation in yeast cells was achieved after 10 min pulse electric field (PEF) exposu...
Optimization, Immobilization of Extracellular Alkaline Protease and Characterization of its Enzymatic Properties
Alkaline protease immobilization Streptomyces application
2010/11/11
Streptomyces avermectinus NRRL B-8165 was the most potent for production of extracellular
alkaline protease among 6 strains of Streptomycetes using shaken culture technique (180 rpm) after 72h at 37°...
Xylanase production by Bacillus pumilus: Optimization by Statistical and Immobilization Methods
B.pumilus xylanase factorial design immobilization
2010/11/10
Two simultaneous statistical experiments were applied in order to optimize medium conditions
for xylanase production by B. pumilus. The first experiment was a 2n factorial design, which revealed the ...
RESOURCE OPTIMIZATION BY SIMULATION TECHNIQUE IN FOOD LOGISTICS
Food logistics discrete event models simulation technique queuing air pollution
2010/3/24
Any activity that receives inputs and convert them to outputs can be considered as a process.
Essentially the same model equations are used in the theory of chemical, biochemical, nuclear,
mechanica...