搜索结果: 1-14 共查到“食品生物化学 pH”相关记录14条 . 查询时间(0.158 秒)
以从小麦、玉米、大米、大麦等作物中分离得到的12株不同种类的镰刀菌菌株为研究对象,探究不同温度和p H对其生长及产毒的影响。结果表明,镰刀菌在10~35℃和p H3~11范围内均能够生长,最适温度为20~30℃,最适p H为6~8。供试镰刀菌能够产生的毒素主要为A型单端孢霉烯族毒素、B型单端孢霉烯族毒素、伏马毒素和镰刀菌酸,产毒温度为5~40℃,但不同菌株的最适产毒温度存在差异;产毒过程受p H影...
本文采用7S形成纤维聚合结构的制备条件,研究低p H条件下长时间热处理对大豆蛋白7S和11S(包括酸性亚基和碱性亚基)乳化性和起泡性的影响。结果发现,低p H条件下长时间热处理的聚合手段,可以显著(p0.05)改善不同大豆蛋白组分的起泡性,但对乳化性没有明显的改善作用,甚至对乳化稳定性有降低作用,这种改善程度与是否形成纤维聚合结构无关。与p H7.0条件下的热处理手段相比,低p H条件下长时间热处...
Combined effects of temperature, pressure and low pH on the amplification of DNA of plant derived foods
GMO food processing DNA degradation DNA amplification
2014/2/25
The effect of food processing on the DNA integrity was studied by means of PCR amplification of soybean, transgenic MON 810 and non-transgenic maize, bean, and pea. The degree of DNA degradation was c...
The Use of Response Surface Methodology in Optimization of Lactic Acid Production: Focus on Medium Supplementation, Temperature and pH Control
lactic acid whey cheese nitrogen sources response surface methodology medium optimization
2010/10/14
Two response surface methodologies involving central composite designs have been
successfully applied to evaluate the effect of cheese whey, corn steep liquor, ammonium
sulphate, temperature and pH ...
pH-Dependent Inactivation of Enzymes by Microbubbling of Supercritical Carbon Dioxide
supercritical CO2 microbubbles inactivation
2009/7/8
The effect of pH on the inactivation of some enzymes (acid protease, alkaline protease, papain, and glucoamylase) dissolved in McIlvaine buffer by microbubble supercritical (SC) CO2 treatment was inve...
Selective Proliferation of Lactic Acid Bacteria and Accumulation of Lactic Acid during Open Fermentation of Kitchen Refuse with Intermittent pH Adjustment
lactic acid kitchen refuse open fermentation
2009/7/8
When minced and autoclaved model kitchen refuse was inoculated with a small amount of non-autoclaved model kitchen refuse as seed culture, incubated at 37°C for 3-5 days and intermittently pH neutrali...
Effects of Salt and pH on Property of Emulsion Prepared with Monolaurin Monoglucoside
emulsion stability monolaurin monoglucoside pH
2009/7/7
The effects of salt and pH on the reduction of interfacial tension and the emulsifying property of monolaurin monoglucoside [MG(C12:0)-G] were investigated. MG(C12:0)-G made an emulsion of an oil in w...
Influence of Cation Sequestering and pH on Quiescent Thermal Association of β-Lactoglobulin AB from Fresh Cheddar Whey: An Insight into Gelation Mechanism
gelation β-lactoglobulin chelation
2009/6/17
Freshly fractionated β-lactoglobulin AB (β-Lg) from Cheddar whey was dispersed at pH 3.5, 7, and 9 buffers containing 20 mM EDTA, and circulated at 25°C through a closed loop containing a 200 nm pore ...
Habituation of Foodborne Pathogens Exposed to Extreme pH Conditions: Genetic Basis and Implications in Foods and Food Processing Environments
foodborne pathogen acid stress alkali stress
2009/6/17
Foodborne microorganisms capable of causing human diseases are exposed to a wide range of physical and chemical stresses in the environment. Exposure of cells to extreme, yet sublethal, preharvest and...
Effects of pH on the Formation of Volatile Products in Non-Enzymatic Browning of Maltose
maltose non-enzymatic browning volatile products
2009/5/31
The effects of pH on the formation of maltol and furanmethanol as well as other minor reductones and furans on heating an aqueous solution of maltose under conditions in the absence (caramelization) a...
Amylase for Apple Juice Processing:Effects of pH, Heat, and Ca2+ Ions
α-amylase apple juice starch hydrolysis
2009/3/20
The aim of this paper was to evaluate the effects of pH, heat, and Ca2+ ions on the α-amylase activities in a commercial amylolytic enzyme (Tyazyme L300), used for apple juice processing. Kinetics of ...
Influence of Dissolved Oxygen Concentration on Intracellular pH and Consequently on Growth Rate of Aspergillus niger
Aspergillus niger intracellular pH oxygen concentration
2009/3/20
With the results presented we would like to emphasize the influence of dissolved oxygen concentration in a medium on intracellular pH values and consequently on overall metabolism of microorganisms. I...
Effect of pH, Cultivation Time and Substrate Concentration on the Endoxylanase Production by Aspergillus awamori ZH-26 under Submerged Fermentation Using Central Composite Rotary Design
Aspergillus awamori ZH-26 optimization response surface methodology
2009/3/6
The effect of substrate concentration, pH and cultivation time on the production of endoxylanase from Aspergillus awamori ZH-26 were optimized by statistical analysis using response surface methodolog...
Effect of pH and water activity on the growth of Arcobacter sp. in culture
Arcobacter sp. weak organic acids water activity
2014/3/19
The effect was studied of pH value and water activity (aw) on the growth of Arcobacter butzleri and Arcobacter cryaerophilus in culture media at 30°C. Various weak organic acids were used to achieve t...