共查询到18条相似文献,搜索用时 46 毫秒
1.
新疆是国内的产棉重点区域,面积也较大,作为棉籽加工企业的副产品的棉籽粕,是一种重要的蛋白质饲料,但其中的棉酚对动物有一定的毒害作用,一直限制了棉籽粕在动物饲料中广泛的应用.通过对棉酚特性、脱酚加工原理和脱酚技术的分析实践,介绍一种棉籽加工工艺.该技术能大幅提升棉籽蛋白的价值,解决棉籽粕在饲料中的运用问题,同时延长了棉籽加工产业链,提升了企业核心竞争力和后续盈利能力. 相似文献
2.
为拓宽棉籽蛋白在食品领域应用范围,对棉籽分离蛋白基本功能性质进行分析,结果显示,本试验条件下所得棉籽分离蛋白(CPI)属酸溶性蛋白质,在酸性条件下(pH1~4)溶解性较好(30%~50%),在近中性溶液中溶解性较差,仅20%左右;乳化性受pH值、离子强度和CPI浓度影响不显著;乳化能力较低,但所得乳状液非常稳定;起泡性受pH值、离子强度和CPI浓度等因素影响很大,在中性pH下最高;添加NaCl对CPI溶液起泡能力影响不大,但会显著影响CPI溶液泡沫稳定性,随NaCl浓度增加,溶液泡沫稳定性急剧降低。粘度分析表明,CPI溶液属典型非牛顿流体,有"剪切变稀"和"热变稀"特征。 相似文献
3.
棉籽粕脱酚方法的研究 总被引:1,自引:0,他引:1
采用热水,热碱,硫酸亚铁,米曲霉四种方法,对棉籽粕进行脱酚实验,结果热 法去酚效果最佳。通过正交试验,热碱法脱酚的最适条件为pH8-9,温度60℃,时间3h,最终棉籽蛋白液棉酚含量为12ppm,完全低于联合国咨询委员会规定的食用棉籽蛋白质中游离棉酚含量≤0.06%标准。 相似文献
4.
5.
6.
7.
8.
9.
脱酚棉籽蛋白市场展望 总被引:1,自引:0,他引:1
脱酚棉籽蛋白是北京中棉紫光生物科技有限公司自有专利技术生产的一种全新的饲料蛋白 ,该产品自 1999年投放市场以来 ,很快就以蛋白含量高、棉酚脱除彻底、外观颜色好、价格适宜等特点 ,受到饲料行业的好评。许多饲料厂家使用棉籽蛋白后 ,因其产品的高品质和价格优势 ,使饲料生产企业降低了成本又受到诸多用户的青睐。许多饲料企业已改用棉籽蛋白来替代豆粕等原料。饲料原料是饲料产业的基础 ,而豆粕、棉粕、棉籽饼、菜籽饼等又是饲料的主要原料。豆粕以蛋白含量高、氨基酸平衡好等特点 ,一直被饲料行业作为主要的植物蛋白源而长期使用。但… 相似文献
10.
介绍了"一步法"脱酚棉籽蛋白生产技术的工艺原理、关键技术以及工艺过程和特点。将6号溶剂与醇类溶剂混合对棉仁进行浸出,同时萃取油脂和棉酚,得到脱酚棉籽蛋白。其成品棉籽蛋白残油低、棉酚含量低、蛋白含量高、产品质量好,是一项值得推广的生产技术。 相似文献
11.
棉仁蛋白是一种潜在的重要食品资源,由于棉酚的存在一直未被人类充分利用。通过甲醇脱酚、4#溶剂脱脂、低温连续脱溶的棉籽粕生产工艺和碱溶酸沉的蛋白生产工艺,于2001年首次实现了工业化利用有腺体棉籽粕生产食用棉仁分离蛋白的实践,获得了高安全性的棉仁分离蛋白。 相似文献
12.
Nutrient content of whole cottonseed 总被引:5,自引:0,他引:5
Bertrand JA Sudduth TQ Condon A Jenkins TC Calhoun MC 《Journal of dairy science》2005,88(4):1470-1477
The objective of this study was to determine if the nutrient and gossypol contents and in vitro digestibility of 3 types of genetically modified whole cottonseed differed from traditional whole cottonseed. Samples of seed from traditional (no genetic modifications) and genetically modified varieties of cotton grown in 1999 and 2000 were analyzed. Genetic modifications included the insertion of genes to protect cotton from insect pests (Bt), and damage from glyphosate herbicides (RR), and from both (Bt/RR). Year effects were significant for in vitro dry matter (DM) digestibility, gossypol, DM, crude protein (CP), fat, neutral detergent fiber (NDF), acid detergent fiber (ADF), and ash. Higher rainfall resulted in higher CP, fat, and ash and lower NDF and gossypol. There were no differences among seed types for ground or whole seed digestibility, DM, CP, fat, NDF, ADF, ash, lignin, net energy for lactation, amino acids, total fatty acids, or seed index. Overall, the nutrient content and digestibility of varieties of genetically modified seed were similar to that of varieties of traditional whole cottonseed. 相似文献
13.
14.
15.
The effects of varying gossypol intake from whole cottonseed and cottonseed meal on lactation and blood parameters in lactating dairy cows 总被引:1,自引:0,他引:1
Effects of varying amounts of gossypol from whole Upland cottonseed (WCS) and cottonseed meal (CSM) were evaluated in 40 midlactation Holstein cows. After 14 d of pretreatment, cows were assigned to 1 of the 5 treatments for 84 d: control (no gossypol), 931 mg/kg total gossypol (TG) and 850 mg/kg free gossypol (FG) from WCS (moderate TG and high FG); 924 mg/kg TG and 91 mg/kg FG from CSM (moderate TG and low FG), 945 mg/kg TG and 479 mg/kg FG with equal amounts of TG from WCS and CSM (moderate TG and FG), or 1894 mg/kg TG and 960 mg/kg FG with equal amounts of TG from WCS and CSM (high TG and FG). Concentrations of plasma gossypol (PG) and its isomers were directly proportional to FG intake. Concentrations of PG reached a plateau after 28 d on treatment, and they were highest in cows receiving a diet with high TG and FG. Erythrocyte fragility differed among treatments and increased with increasing FG intake. Plasma gossypol returned to negligible concentrations 28 d after withdrawal of cottonseed products from the high TG and FG diet. Serum vitamin A was similar among treatments, but vitamin E increased with increasing FG intake. Serum enzymes were generally unaffected by treatments, but urea N increased in diets higher in TG and FG. Intake of dry matter was higher for the diet high in TG and FG than for the control diet, but was similar for other treatments. Cows receiving the high TG and FG diet produced more milk and 3.5% fat-corrected milk, with no changes in milk composition. Feeding a diet containing 1894 mg/kg TG and 960 mg/kg FG for 84 d increased PG concentrations and erythrocyte fragility and resulted in minor changes in blood metabolites and enzymes, but no detrimental effect on lactation performance was observed. Indicators of liver, kidney, and muscle cell viability suggest that the higher amounts of gossypol consumed in this study had only minor effects on those tissues in lactating dairy cows. 相似文献
16.
胰蛋白酶限制性水解脱酚棉籽蛋白的研究 总被引:1,自引:0,他引:1
采用胰蛋白酶对脱酚棉籽蛋白进行限制性酶解,以改善棉籽蛋白在中性条件下的溶解性.以酶解棉籽蛋白水解度和溶解度为指标,对胰蛋白酶水解脱酚棉籽蛋白的条件进行了优化.结果表明,胰蛋白酶水解脱酚棉籽蛋白的优化条件为:酶底比2∶ 1(50 000 U/g),底物质量浓度100 g/L,pH 10,于20 ℃下酶解3 h.在此条件下,酶解棉籽蛋白的水解度为10.87%,溶解度为63.48%.与酶解前相比,溶解度提高了43.82%.溶解度分析结果表明,限制性酶解棉籽蛋白在pH 1~11范围内均具有较好的溶解度,仍然保持了棉籽蛋白酸溶性的特点. 相似文献
17.
以脱脂棉籽粕为原料,采用碱溶酸沉法制备棉籽分离蛋白。以蛋白质提取率、产品蛋白质含量为指标,考察提取温度、提取时间、p H、液固比对棉籽分离蛋白提取效果的影响。另外,采用SDS-PAGE对所制备棉籽分离蛋白中蛋白质亚基相对分子质量分布进行了分析。结果表明,通过正交实验优化得到棉籽分离蛋白最佳制备工艺条件为:提取温度60℃,提取时间60 min,p H 10,液固比14∶1。在最佳工艺条件下,蛋白质提取率为73.21%,产品蛋白质含量为90.76%(N×6.25,干基),且游离棉酚含量由原料的0.12%下降到0.033%。棉籽分离蛋白中蛋白质亚基相对分子质量主要为59.3 k Da与53.7 k Da,占47.66%。 相似文献
18.
以95%的乙醇为溶剂对棉仁低温压榨饼进行浸出,同时浸出饼中油脂和脱除所含游离棉酚.探讨了原料粒度、原料水分、浸出温度、浸出时间和固液比等因素对粕中残油率和游离棉酚含量的影响.通过正交实验,得出最佳浸出工艺条件为:原料粒度7.5 mm,原料水分小于9%,浸出温度78 ℃,浸出次数12次(每次15 min),固液比1∶ 3.在此条件下,浸出棉粕中残油率为0.91%,游离棉酚含量为0.012 9%,粗蛋白含量为51.81%(N×6.25,干基). 相似文献