玉米高F值低聚肽的生理功能及其制备工艺

阐述了玉米高F值低聚肽的生理功能、制备工艺及其应用。玉米高F值低聚肽具有高含量支链氨基酸低含量芳香族氨基酸的特点,有抗疲劳、辅助治疗肝性脑病、改善病人的蛋白质营养状况等功能,其制备工艺主要包括:玉米蛋白粉经脱脂脱杂、酶解、去芳香族氨基酸、脱盐纯化得到生物活性寡肽。     

玉米蛋白粉的营养价值及二次开发的潜力

玉米蛋白粉是玉米加工中的副产物,除作饲料外还有很多用途.文章简单介绍了玉米蛋白粉的化学成分、营养价值及其独特的氨基酸组成,阐述了国内当前利用玉米蛋白粉二次开发制得氨基酸、玉米醇溶蛋白、玉米黄色素和生物活性肽等深加工产品.     

酶解玉米蛋白生产生物活性多肽的研究现状及开发趋势

本文概述了酶解玉米蛋白制备生物活性多肽的现状及趋势,并提出了利用玉米蛋白制备生物活性多肽需要进一步探究的几个问题以及它的开发潜能。     

玉米类胡萝卜素的生物活性及提取技术研究进展

玉米类胡萝卜素除了作为维生素A原,还具有护眼、抗癌、抑制肥胖、预防阿尔茨海默氏病和骨质疏松以及抗氧化等多种生物活性;提取玉米淀粉之后的副产物玉米蛋白粉富含类胡萝卜素,是提取类胡萝卜素的主要原料之一。本文介绍了玉米中主要类胡萝卜素的种类,综述了其生物活性及玉米蛋白粉中类胡萝卜素的提取技术,展望了今后的研究趋势,为促进玉米资源的开发利用提供参考。     

玉米蛋白粉综合加工利用研究的新进展

玉米蛋白粉是玉米加工中副产物，除作饲料外还有很多用途。简单介绍了玉米蛋白粉的化学成分、营养价值及其独特的氨基酸组成，阐述了利用玉米蛋白粉二次开发可得蛋白发酵粉、氨基酸、玉米醇溶蛋白、玉米黄色素和生物活性肽等深加工产品。     

玉米蛋白粉深加工应用的新进展

玉米蛋白粉是玉米加工中副产物，除作饲料外还有很多用途。文章简单介绍了玉米蛋白粉的化学成分、营养价值及其独特的氨基酸组成，阐述了利用玉米蛋白粉二次开发可得蛋白发酵粉、氨基酸、玉米醇溶蛋白、玉米黄色素和生物活性肽等深加工产品。     

玉米蛋白粉二次开发及应用

玉米蛋白粉是玉米加工副产物,除作饲料外还有很多用途;该文简介玉米蛋白粉化学成分、营养价值及其独特氨基酸组成;概述利用玉米蛋白粉二次开发可制得氨基酸、玉米醇溶蛋白、玉米黄色素和生物活性肽等深加工产品。     

猪血中主要功能成分的制备、修饰及应用研究进展

猪血是屠宰加工产生的主要副产品之一,营养成分丰富,尤其是含有免疫球蛋白、生物活性肽、血红素、超氧化物歧化酶等具有特定生理功能的成分,应用前景广阔。该文对来源于猪血液中的主要功能成分血浆蛋白粉、血红蛋白粉、血红素、生物活性肽等的制备和修饰成分在食品药品中的应用进行综述,以期为猪血液资源的综合利用和研究提供参考。     

食品源性降血压活性肽的研究进展

食源性生物活性肽具有提升人体的健康状况以及治疗多种疾病的功能,尤其是调节血压的能力已经得到了证实.研究表明这些多肽的药理作用和其本身的结构相关,还取决于目标组织对它们的吸收和利用的效率.文章总结了一些重要的抗高血压多肽和功能性食品的降压效果,降压的分子机制,影响因素,多肽的制备分离等内容.结果表明,未来的研究将集中在生物活性肽在受试患者体内降血压作用的评价、生物利用度和药代谢动力学方面.     

玉米蛋白粉的应用研究进展

综述了玉米蛋白粉的组成、营养价值及其成分特点,并且阐述了国内利用玉米蛋白粉开发出的提取玉米黄色素、天然β-胡萝卜素、玉米醇溶蛋白、氨基酸,制备玉米活性肽等用途。     

响应面法优化玉米蛋白挤出工艺

双螺杆挤出改性处理脱脂玉米蛋白粉。以脱脂玉米蛋白粉含水量、挤出温度、螺杆转速为响应因素,可溶性蛋白含量为响应值,采用响应面分析方法,确定脱脂玉米蛋白粉挤出改性的最佳工艺条件。结果表明：物料含水量68%、挤出温度163℃、螺杆转速30Hz(225r/min)时,挤出脱脂玉米蛋白粉中可溶性蛋白含量最高,为3.43%。采用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)测定挤出改性后玉米可溶性蛋白的分子质量分布,结果显示其分子质量介于3500～14300D之间,且主要是分子质量为3500～6500D的多肽。改性后的玉米蛋白粉其理化性质都有了较明显的改善,说明双螺杆挤出改性玉米蛋白粉效果明显,切实可行。     

玉米蛋白功能肽开发

玉米蛋白粉含有丰富蛋白质,其氨基酸组成独特,与具有相同氨基酸组成玉米蛋白质相比,玉米蛋白粉酶解物中玉米多肽具有许多独特理化特性与生物学活性,使玉米蛋白功能肽具有十分广阔开发空间及市场潜力。该文对玉米蛋白功能肽生理功能进行概述,为玉米功能肽研究开发提供参考资料。     

玉米黄色素的提取工艺及应用研究现状

我国玉米产量大,玉米蛋白粉是玉米淀粉生产过程的下脚料,其中含有丰富的玉米黄色素,是玉米黄色素提取的理想原料。玉米黄色素可作为天然着色剂应用到食品工业。此外,因其有很强的抗氧化性,所以具有保护视力、抗癌、预防心血管疾病等生理功效。文章简述了玉米黄色素的组成和性质,并对其提取方法和应用现状进行了综述。     

玉米蛋白加工利用研究进展

在湿法玉米淀粉加工中,玉米蛋白存在于副产物玉米黄粉、玉米胚芽饼和玉米浆中。文章在分析玉米蛋白氨基酸组成等特性的基础上,综合分析玉米蛋白加工利用现状和玉米蛋白水解物的功能特性,指出玉米蛋白水解物在食品工业上应用的潜力。     

Characterization and evaluation of emulsifying properties of high pressure microfluidized and pH shifted corn gluten meal

This study presents a potential application for adding value to corn gluten meal, which is often used as animal feed and underutilized in food industry. This study is aimed to improve water holding ability of zein-rich by product corn gluten and investigate possibility of using it as an emulsifier. The potential use of microfluidization (500–1250 bar and 25 °C) and pH shifting (to pH6, 8, and 10) as a modification process for corn gluten meal and their effects on emulsifying properties were investigated. The formulations used for CGM(g):corn oil (mL) mixtures were 5:15, 5:30, 5:50, 10:15, 10:30, 10:50, 15:15, 15:30, and 15:50. Microfluidization and pH modification decreased the particle size of emulsions, resulting in the formation of tissues and micropores, and a consequent increase in surface area and water-holding capacity. pH shifting in dispersions around neutrality (pH6 and pH8) provided improvements in emulsion properties; however, excessive shifting (pH10) caused protein denaturation. Herschel-Bulkley model was well-fitted to explain flow behaviors. Flow and viscoelastic measurements showed that all formulations exhibited shear thinning and elastic gel-like behavior. The sedimentation rate, measured using LUMiSizer, was decreased by microfluidization and pH modifications. This study showed that these treatments can be used to convert an underutilized material into a valuable one in food industry.     

Emulsifying activity and emulsion stability of corn gluten meal

Corn gluten meal with good emulsifying activity and emulsion stability may have potential in food uses. Commercial corn gluten meal from various producers had a pH around 4 and showed no emulsifying activity. Reducing the particle size to below 15 µm or increasing the pH to 6.6 (with particle size above 53 µm) did not improve the emulsifying activity. When the particle size was reduced to below 44 µm and the pH was adjusted to 6.6 or above, good emulsifying activity and good emulsion stability could be obtained. The emulsifying activities of corn gluten meals (<44 µm) from four different producers at around pH 8 ranged from 49.3 to 51.5 and the corresponding emulsion stabilities ranged from 39.7 to 49.5. There was no significant variation in emulsifying activity between pH 6.9 and 7.8 when NaOH, LiOH and KOH were used to adjust the pH, but LiOH‐ and KOH‐adjusted meal at around pH 7.8 showed better emulsion stability than NaOH‐adjusted meal. Good emulsifying activity of corn gluten meal could be obtained in NaCl solutions at sufficiently high pH. Published in 2001 for SCI by John Wiley & Sons, Ltd.     

从玉米蛋白粉提取天然β-胡萝卜素研究

天然β-胡萝卜素具有重要生理活性功能,是一种优良的食品营养强化剂。该研究以生产玉米淀粉副产物玉米蛋白粉为原料提取天然β-胡萝卜素;筛选出合适的萃取剂,确定最佳工艺条件,此提取工艺可显著提高玉米附加值。     

不同变性方式对Alcalase AF2.4L酶解玉米蛋白水解度的影响

玉米蛋白水溶性差一直是阻碍水解度提高的瓶颈 ,采用不同方式对玉米蛋白的变性进行了研究 ,以期摸索出提高酶解玉米蛋白水解度的途径。实验表明 ,采用“变性剂A”对玉米蛋白进行预处理后 ,能显著地提高玉米蛋白在时间和水解度上的酶解水平 ,使得AlcalaseAF -2 .4L酶解玉米蛋白的水解度经过 1h酶解可达 30 %以上。     

玉米蛋白粉日粮纤维和能量对猪氮代谢的影响

平均体重 5 0 .9kg生长猪 ,采用全收粪法 ,6× 6拉丁方试验设计 ,测定不同种类的玉米蛋白粉日粮纤维和能量对生长猪氮代谢的影响。试验结果 :玉米蛋白粉 (CP :5 2 % )、玉米蛋白粉 (CP :47.4% )、玉米蛋白粉 (CP :32 % ) 3种日粮 ,氮的消化率分别为 87.9% ,88.9% ,89.7% ;总氮利用率分别为 5 2 .6 4% ,49.0 2 % ,37.86 % ;粪氮与日粮氮比值分别为 12 .0 % ,11.1% ,10 .5 %。玉米蛋白粉日粮的氮沉积量、氮消化率、总氮利用率与日粮的NDF ,ADF ,CF的消化率呈线性正相关。日粮的粪氮与日粮氮比值 ,同日粮的NDF ,ADF ,CF的消化率呈线性负相关 ,同日粮的NDF或CF含量呈线性正相关     

Protein sources evaluated for ruminating Holstein calves

Fifty calves were fed a basal diet of 11.6% crude protein or one of four diets (15.5% crude protein) containing added soybean meal, corn gluten meal, cottonseed meal, or fish meal. Diets were calculated 75% total digestible nutrients. Body weight gain increased an average of 17% with added protein. Fish meal and soybean meal generated highest rates of gain. Ruminal ammonia-nitrogen was higher for soybean meal and cottonseed meal than other diets, indicating greater rates of degradability. Molar proportions of rumen volatile fatty acids were not different among diets, but concentration was lower for fish meal. Serum urea nitrogen was lowest for the basal and fish meal diets. Microbial nitrogen in the abomasum was 33.6% of total nitrogen for corn gluten meal and 42.8% for soybean meal. Apparent dry matter and nitrogen digestibilities were greater for corn gluten meal and fish meal diets than for soybean meal or cottonseed meal diets. Rumen degradability of feedstuffs, as determined by dacron bag technique, ranged from 38.1% for corn gluten meal to 71.3% for soybean meal. Degradability of mixed diets reflected those of the protein supplement present in each diet except for diet containing cottonseed meal. Fish meal and soybean meal were better protein sources for growth of ruminating calves than were corn gluten meal or cottonseed meal.