共查询到19条相似文献,搜索用时 312 毫秒
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大豆改性磷脂的特性及其制备和应用 总被引:4,自引:0,他引:4
大豆改性磷脂的特性及其制备和应用齐齐哈尔大学工学院,161006冯云生赵福全赵欣大豆磷脂是大豆制油后的副产物,是从含有0.4%~0.5%粗磷脂的油脚中提取出来的产品。磷脂广泛存在于动物、植物的细胞组织内,目前能够工业化生产的只有大豆磷脂。大豆磷脂是由... 相似文献
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改性大豆磷脂在速溶豆粉中的应用 总被引:1,自引:0,他引:1
1 前言磷脂是天然的非离子两性表面活性剂 ,具有优良的乳化性、扩散性和浸润性。有关文献报道 ,添加或喷涂到乳粉或豆粉上可提高产品的分散性和水溶性。美国ADM公司将改性大豆磷脂直接添加到乳粉或豆粉的浓缩浆液中再喷雾干燥制粉 ,都可增强产品速溶性。本组就此做了生产试验 ,并对产品进行了质量检测。2 材料及工艺2 1 材料优质大豆 ,浓缩磷脂 (ADM公司HLB值 4 ) ,棕榈油(马来西亚 ) ,改性 (乙酰化 )磷脂 (自制 ,HLB值 8) ,蔗糖 ,麦芽糊精。2 2 工艺流程2 2 1 普通豆粉加工工艺 :优质大豆→精选→瞬时高温灭酶→脱皮… 相似文献
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改性大豆磷脂在饲料中的应用 总被引:1,自引:0,他引:1
1 前言饲料用改性大豆磷脂,选用优质的大豆制油后的副产品为原料,采用新工艺新技术,经科学加工精制而成为纯天然营养型添加剂。适用于各种畜、禽和水产养殖的饲料和饵料添加需要。随着畜牧业、水产业和饲料工业的发展,该产品将得到广泛应用。2 产品的研制与开发公司从1995年开始进行饲料用改性大豆磷脂项目的研制,设计建起一个年产300吨改性磷脂的中试小厂。投产后产品供不应求,用户反映极好。经过一年的中试生产,模清了工艺设备的条件和参数,为扩大开发创造了条件,打下了基础。1996年初,为了满足市场需求,经过反复考察论证,确定了新工艺… 相似文献
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为了解磷脂酶基因家族在亚麻芥胚中的表达情况,本研究基于454测序技术对亚麻芥花后10d(DAF10)和花后20d(DAF20)的胚中磷脂酶基因家族进行筛选和分析。测序结果表明,DAF10样本和DAF20样本分别获得有效序列521 507个和310 125个,序列长度主要分布在341~560 bp,序列组装分别获得25 398个和23 678个Unigene,Unigene平均长度分别为630 bp和654 bp。在此基础上,筛选两个样本全部Unigene,共获得磷脂酶基因36个,其中属于磷脂酶A1基因4个、磷脂酶A2基因9个、磷脂酶C基因10个、磷脂酶D基因13个。Pathway基因功能注释显示,PLA1的4个候选基因没有注释到任何代谢通路上;PLA2中只有候选基因Unigene19110被成功注释,它在植物中主要参与甘油磷脂代谢途径和醚酯代谢途径。PLC家族中只有4个候选成员Unigene443、Unigene8071、Unigene8213和Unigene7311被成功注释,它们除参与甘油磷脂代谢和醚酯代谢之外,还在肌醇磷酸代谢途径中发挥重要作用。而PLD家族中除Unigene18630、Unigene17966和Unigene441没有代谢通路注释信息外,其他的10个成员,也都只在甘油磷脂代谢途径和醚酯代谢途径有作用。 相似文献
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以菜籽毛油为原料,分析不同脱胶工艺条件下菜籽油的酸价、过氧化值、含磷量、甾醇、生育酚和甘油二酯的变化情况,以及脱脂油脚中磷脂的组成及含量。结果表明:基于不同脱胶原理的脱胶方法在脱胶能力上存在显著差异,酶法脱胶效果优于水化脱胶,与磷脂酶C相比,磷脂酶A1酶法脱胶效果更彻底;脱胶后菜籽油的过氧化值和酸价都呈下降趋势,磷脂酶A1酶法脱胶油酸价降低程度最小;脱胶油中生育酚和甾醇含量略有下降,最大降幅约为5%;PLC酶法脱胶油中甘油二酯含量显著上升;脱胶油中1,3-甘油二酯与1,2-甘油二酯含量的比例下降,其比例范围为(2.2~3.0):1。经不同脱胶工艺处理后,脱脂油脚中磷脂组成与含量存在明显差异,水化脱胶油脚中磷脂总量最高,磷脂酶A1酶法脱胶油脚中溶血磷脂含量最高,磷脂酶C酶法脱胶油脚中磷脂酰肌醇含量最高。 相似文献
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以3种不同的大豆磷脂为材料,用反相蒸发法制备脂质体,通过对其形态、粒径、包封率、泄漏率和稳定性的测定,研究大豆磷脂组成对脂质体性质的影响.结果表明,脂质体为圆球状的小囊泡,以含有磷脂酰胆碱(PC)93.62%的磷脂SPC-3为材料制备的脂质体相比较于以PC含量分别为31.29%和58.19%的磷脂SPC-1和SPC-2制备的脂质体,具有最大的包封率、粒径和最小的泄漏率.稳定性研究结果表明以磷脂SPC-1为材料制备的脂质体稳定性好. 相似文献
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大豆磷脂产品质量的检验方法概况哈尔滨市产品质量监督检验所刘涛哈尔滨市食品工业研究所王菁文黑龙江省农业环保站赵瑾近年来,随着大豆磷脂开发应用研究的发展,磷脂的检验方法也有较大进展。美国、日本、西德等国都建立了各自的检验方法。我国目前多采用商检的分析方法... 相似文献
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《Industrial Crops and Products》2005,21(1):113-119
Development and application of bio-based fluids in industrial and automotive sectors are rapidly increasing due to their non-toxic and biodegradable character unlike mineral oil-based products. Synthetic lubricant base fluid with improved high and low-temperature stability was prepared by chemical modification of epoxidized soybean oil (ESBO). The reaction was carried out in two-steps: (i) synthesis of dihydroxylated soybean oil from ESBO with HClO4, (ii) reaction of acetic, butyric and hexanoic anhydride with the dihydroxylated product. The composition of the reaction products were confirmed by NMR and FTIR analysis. Chain length variation of the anhydrides used in the synthesis resulted in base fluids with different physical and chemical properties. Low-temperature stability was excellent for hexanoic anhydride derivative. When compared with SBO, thermal and oxidative stabilities were improved. Viscosity, volatility and other lubricant base oil properties were evaluated qualitatively. Bio-fluids based on this chemical modification offer great potential for the development of industrial fluids and products based on such fluids. 相似文献
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研究了碱润涨预处理和微波强化碱润涨预处理对豆渣膳食纤维化学结构,物理特性以及对豆渣纤维素酯化反应的影响。结果表明,与碱润涨预处理相比,微波强化碱润涨预处理对豆渣膳食纤维的活化效果更好,二者均没有改变豆渣纤维素的化学组分。在相同的反应条件下,没有经过预处理、碱预处理和微波强化碱润涨预处理豆渣纤维素酯的取代度分别为0.0445、0.0558和0.0681,即经过预处理后豆渣纤维素的反应可及度增大,酯化效率由57.57%提高到了88.10%,且随微波辐照时间的延长,豆渣纤维素酯的取代度增加。经过酯化改性后,豆渣纤维素酯具有较强的油污去除力,且随着酯化取代度的增加,去污力呈增加的趋势,可以应用在洗涤用品中。 相似文献
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Roundup Ready大豆外源基因在食品加工过程中的降解变化 总被引:6,自引:0,他引:6
采用定性PER检测技术,通过分析豆腐、豆奶、豆粉3种大豆加工食品中磨浆、煮浆、调配、均质、杀菌、喷雾干燥等关键工艺对Roundup Ready大豆外源基因EPSPS的影响,揭示外源基因在不同加工过程中降解程度的变化规律。研究结果表明,外源基因EPSPS在3种大豆加工食品的各个工艺过程中均会受到不同程度的破坏和影响。在豆腐、豆奶、豆粉的加工过程中,片段大小为1512bp及807bp的外源基因仅能在原料中检测到;当原料经过磨浆后,EPSPS基因的片段大小骤然降至800bp以下;点浆、加热等工艺又使得外源基因继续降解至400bp左右;随着挤压成型、高温杀菌及喷雾干燥工艺的完成,3种大豆终产品中目的基因片段大小仅为190bp左右。 相似文献
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茶儿茶素体外氧化产物分析 总被引:25,自引:4,他引:21
采用体外模拟发酵, 对从绿茶中提取的茶多酚( 其中儿茶素含量为78-09 % ) 进行酶促氧化、化学氧化和自动氧化, 制取茶色素, 经HPLC分析, 结果表明, 酶促氧化和化学氧化的产物吸收峰均能得到明确分辨, 其保留时间与红茶汤中茶色素成分相吻合, 而自动氧化的产物中则缺少TFs。优化的化学氧化法制得的茶色素中, TFs 和TRs1 含量高于酶促氧化制品。 相似文献
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大豆抗原蛋白去除工艺的研究进展 总被引:1,自引:0,他引:1
大豆抗原蛋白作为一种热稳定性抗营养因子,常规热处理难以去除,成为大豆蛋白源在人类食品及饲料中安全高效利用的瓶颈。文章对大豆中主要抗原蛋白及其理化性质以及物理处理、化学处理、生物处理、糖基化处理等大豆抗原蛋白去除方法的研究进展进行综述,以期为大豆抗原蛋白加工去除工艺的发展提供参考。 相似文献
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Zorica Nikolić Ksenija Taški-Ajduković Mladen Tatić Svetlana Balešević-Tubić 《Industrial Crops and Products》2009,29(2-3):638-641
The Vojvodina province is the most important agricultural area of the Republic of Serbia and is its largest soybean producer. Serbian low forbids the introduction of genetically modified organisms (GMO) into the environment and demands labeling of food containing more than 0.9% GMO. This aim of this study is to monitor the Roundup Ready (RR) soybean in fields and in food products using PCR and immunoassays. A duplex PCR reaction was performed to analyze the lectin gene and 35S promoter using DNA isolated from soybean leaf and seed sample. Specific detection of RR markers was performed using nested PCR and verified by immunoassay. RR soybeans were found in 68 fields in samples from 2003 and 28 fields in 2004. The presence of the RR soybean was confirmed in 44 seed samples out of 7142 samples examined in 2006 and in 108 out of 7171 samples examined in 2007. The data presented here are the first to demonstrate the presence of RR soybean in the Serbia fields. 相似文献
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Vikash Babu Syed Khalid Pasha Govind Gupta C. B. Majumdar Bijan Choudhury 《Fibers and Polymers》2014,15(1):24-29
Polyacrylonitrile (PAN) is a widely used polymer in the textile industry. PAN contains cyano groups on the surface due to which it possess low hydrophilicity and limits its application. Thus, there is a need to modify the functional groups on the surface of PAN for its industrial demand to improve moisture uptake, dyeability with ionic dyes, without affecting mechanical properties. A number of strategies such as chemical treatment, plasma treatment, enzymatic treatment etc. have been applied for the surface modification of polymer but enzymatic treatment are advantageous over plasma treatment and chemical treatment. In enzymatic treatment, reaction is limited to polymer surface only, and provides milder condition with less damage to polymer. In present study, it was found that enzyme system of Amycolatopsis sp.IITR215 was effective enzyme system for modification of surface nitrile groups of polyacrylonitrile. PAN powder was treated with the cell free extract of Amycolatopsis sp.IITR215 and it was found that the nitrile metabolizing enzymes of this strain were efficiently able to transform -CN to -COOH groups present on the surfaces of PAN powder. The formation of carboxyl group was quantified by ammonia released and dye binding assay. Further, confirmation of carboxyl group on polymer was done by FTIR and XPS. This study indicates that, specific adsorption of enzyme probably plays an important role in the enzymatic surface modification of polymer. 相似文献