搜索结果: 1-15 共查到“工学 casein”相关记录50条 . 查询时间(0.078 秒)
Relationship between somatic cell count and milk casein level obtained by two different methods
raw milk proteins cow
2016/2/23
The purpose of the present work was to investigate the impact of somatic cell count (SCC) on the content of milk casein and to compare the sensitivity of different methods for the determination of the...
Influence of composite κ-casein and β-lactoglobulin genotypes on composition, rennetability and heat stability of milk of cows of Slovak Pied breed
cow milk genetic polymorphism milk protein casein rennetability heat stability
2015/6/4
The effect of the phenotypic combination of genetic variants κ-CN/β-Lg on the contents of technologically and nutritionally important components of milk as well as technological properties of milk was...
Application of FT near spectroscopy for determination of true protein and casein in milk
near-infrared spectroscopy cow’s milk ewe’s milk goat’s milk colostrum true protein casein chemical composition
2015/6/4
Our study deals with a possibility of determining true protein and casein in cow’s, ewe’s and goat’s milk and in ewe’s colostrums by FT NIR spectroscopy. Samples of milk were analysed by FT NIR in the...
Properties of casein hydrolysate as affected by plastein reaction in ethanol-water medium
angiotensin converting enzyme casein hydrolysate metal chelation plastein reaction
2014/2/24
Casein hydrolysate with in vitro ACE-inhibitory activity of 44.4% at 0.3 mg/ml was generated from casein by Alcalase and modified by the Alcalase-catalysed plastein reaction in an ethanol-water medium...
酪蛋白水解物的酶法修饰优化与抗氧化活性改善（Enzymatic Modification of Casein Hydrolysates by Plastein Reaction and Improvement in Antioxidant Activity）
酪蛋白水解物 抗氧化活性 类蛋白反应
2010/1/28
利用木瓜蛋白酶对酪蛋白水解,并对所得到的水解物进行类蛋白反应修饰，制备高活性抗氧化肽。以水解物的游离氨基含量变化为响应值，利用响应面分析法对类蛋白反应条件进行优化，得到适宜条件为：酶添加量为500U/g，温度30℃，底物质量分数50%，反应时间5.6h。毛细管电泳分析确认，水解物经类蛋白反应修饰后肽分子组成发生变化。抗氧化活性分析结果表明，所制备的3个修饰产物对3种自由基的清除能力显著提高。
过氧化物酶催化酪蛋白的交联反应优化与乳化性改善（Cross-linking of Casein by Peroxidase and Modification in Emulsifying Properties）
酪蛋白 辣根过氧化物酶 交联
2009/11/24
采用辣根过氧化物酶对酪蛋白进行酶促交联，并经SDS-聚丙烯酰胺凝胶电泳、光谱分析和毛细管电泳验证。利用毛细管电泳、面积归一化方法对交联酪蛋白进行分析并计算交联度；以交联度为指标、应用响应面分析法对交联条件优化，得出适宜的条件为：温度37℃、反应时间2.9h、酶添加量为每克蛋白质4.73 μkat，此条件下酪蛋白交联度达到6.9%。与酪蛋白相比，交联酪蛋白的乳化活性在蛋白质质量分数为0.1%时提高了...
干热处理对AN-g-Casein纤维结构和性能的影响
纤维结构 AN-g-Casein 干热处理
2009/10/15
为研究干热处理对丙烯腈酪素接枝共聚(AN-g-Casein)纤维性能和结构的影响,采用扫描电镜、傅里叶红外光谱、X-射线衍射等进行分析。结果表明:在140℃以下干热处理时,纱线收缩率较小,白度变化较小,且强力增加;140℃是丙烯腈酪素接枝共聚纤维安全干热加工的临界温度;干热处理温度超过140℃,丙烯腈酪素接枝共聚纤维结构发生变化,纤维开始扭曲变形,泛黄加剧,结晶度下降。
Polymorphism of κ -Casein in Italian Goat Breeds:A New ACRS-PCR Designed DNA Test for Discrimination of A and B Alleles
ACRS-PCR genetic polymorphism goat κ-casein
2009/3/20
The objective of this study was to develop a DNA test for rapid characterisation of goat κ-casein (κ-CN) A and B variants and to study this polymorphism in Italian goat breeds. Genetic polymorphism of...
Caprine as1-Casein Polymorphism: Characterisation of A, B, E and F Variants by Means of Various Biochemical and Molecular Techniques
Capra hircus as1-casein electrophoresis RP-HPLC
2009/3/16
Considering a wide interest for the characterisation of caprine as1-casein variants and a large number of differently equipped laboratories, the objective of this study was to analyse and compare char...
Effect of Casein Hydrolysates on Yogurt Fermentation and Texture Properties during Storage
yogurt casein hydrolysates probiotic count
2009/3/10
Effects of casein hydrolysates by papain on acidification of the yogurts and growth of probiotic bacteria during yogurt fermentation have been investigated. The viability of probiotic bacteria and tex...
Studies on Enzymatic Crosslinking of Casein Micelles
microbial trasglutaminase casein micelle crosslinking
2014/3/10
The aim of our study was to gain insights into the reactions occurring in casein micelles during enzymatic modification with microbial transglutaminase (mTG). Therefore, UHT-treated milk was incubated...
Vascular Sources of Phenylalanine, Tyrosine, Lysine, and Methionine for Casein Synthesis in Lactating Goats
mammary gland peptides casein synthesis
2008/6/19
The contribution to casein biosynthesis of peptides derived from blood was examined in late lactation goats (254 to 295 d in milk). Ratios of mammary uptake of free amino acids (AA) in blood to output...
Viscoelastic Properties of Oil-Water Interfaces Covered by Bovine ß-Casein Tryptic Peptides
oil-in-water emulsion casein hydrolysis bovine milk viscoelasticity
2008/6/17
A combination of proteolysis and dilational rheology has been used to study the behavior of films of ß-casein (ß-CN) and of peptides spread at the oil-water interface. Identification of th...
The Two-Stage Coagulation of Milk Proteins in the Minimum of the Heat Coagulation Time-pH Profile of Milk: Effect of Casein Micelle Size
milk heat stability casein micelle size
2008/4/1
Milks with casein micelles larger or smaller than control milk were prepared by differential centrifugation. The heat stability of these modified milks increased markedly throughout the pH range 6.4 t...
Functional Properties of Chemically Phosphorylated Whole Casein
calcium casein functionality phosphorylation
2008/3/28
The functional properties of unmodified whole casein were compared with those of casein that had been chemically superphosphorylated using phosphorus oxychloride at three different pH values. Casein m...