SDS/异辛烷(正辛醇)反胶束体系萃取植物蛋白的研究

利用十二烷基磺酸钠(SDs)/异辛烷(正辛醇)反胶束体系萃取植物蛋白.主要研究SDS/异辛烷(正辛醇)反胶束体系萃取棉籽粕和大豆蛋白的萃取,分析各种因素对蛋白萃取率的影响.主要讨论含水量Wo对萃取丰的影响及物料的性质对反胶束萃取植物蛋白的影响.并与AOT/异辛烷反胶束体系萃取棉籽粕和大豆蛋白的萃取率作了比 较.结果表明:SDS/异辛烷(正辛醇)反胶束体系萃取大豆时的萃取率较高.     

不同反胶束体系萃取大豆蛋白研究

利用AOT/异辛烷/KCl溶液,SDS/异辛烷―正辛醇/KCL溶液,CTAB/异辛烷―正辛醇/KCL溶液三种反胶束体系前萃取大豆蛋白质,针对影响大豆蛋白萃取率的各种因素如W0、缓冲溶液pH、萃取温度、萃取时间、离子强度进行了研究,得到了三种反胶束前萃取的最佳工艺:W0均取16;缓冲溶液pH分别为6.5、6.5、10;萃取温度分别为45、45、35℃;萃取时间均取30 min;离子强度均取0.05 mol/L。试验结果表明AOT和SDS反胶束最佳前萃取条件相同,CTAB反胶束最佳前萃条件中pH和萃取温度与以上两种体系不同,其它条件相同。     

SDS/异辛烷/正辛醇反胶束体系后萃大豆蛋白的研究

本文主要研究了以SDS/异辛烷/正辛醇反胶束体系萃取大豆蛋白的后萃过程,并分析了各因素对蛋白后萃率的影响,通过响应面试验得到了SDS/异辛烷/正辛醇反胶束体系萃取低温脱溶豆粕中蛋白质的最佳后萃工艺条件。对不同的后萃方法进行了进一步研究,使大豆蛋白的后萃率得到了提高。     

超声波技术在SDS反胶束萃取中的应用研究

研究了超声波对十二烷基磺酸钠(SDS)/异辛烷(正辛醇)反胶束体系对大豆蛋白萃取的强化作用.分析了各种因素对蛋白前萃率的影响,并与未使用超声波辅助反胶束萃取大豆蛋白进行了比较.结果表明采用超声辅助反胶束萃取大豆蛋白,蛋白质可提高23%,且萃取时间大为缩短.使用正交实验得到了超声辅助反胶束萃取大豆蛋白的最佳前萃工艺为:超声功率270W、W0=20、温度40℃、KC1浓度为0.05mol/L、萃取时间30min、豆粉加入量0.015g/mL、pH值8.0.在此条件下蛋白前萃率为82.08%.     

反胶束溶液萃取大豆蛋白前萃工艺的研究

本文研究了AOT／异辛烷反胶束溶液萃取大豆蛋白的前萃机理和工艺，研究了pH、W0、表面活性剂AOT的浓度、KCl的浓度、萃取时间和萃取温度对蛋白前萃取率的影响，得到了以AOT／异辛烷体系萃取低温脱脂豆粕中蛋白质的最佳前萃工艺条件。     

超声波辅助AOT反胶束体系后萃大豆蛋白的研究

研究超声波辅助反胶束体系(AOT/异辛烷)萃取大豆蛋白的后萃过程,并分析各因素对蛋白后萃率的影响,通过正交试验得到了AOT/异辛烷反胶束体系萃取全脂大豆粉中蛋白的最佳后萃工艺条件为:KCl浓度1.0 mol/L、pH值7.0、超声功率为270 W.在此条件下,蛋白质的后萃率为98.91%.     

反胶束体系及其萃取大豆蛋白应用的研究

本文主要研究了几种不同反胶束体系的配制,分别测定了体系中的Wo,并进行了比较分析得出阴离子表面活性剂加溶水量比较大。用几种Wo相对比较大的反胶束体系萃取了低温脱溶豆粕中的蛋白,比较前萃率得出SDS/异辛烷/正辛醇反胶束体系对大豆蛋白的前萃率较高。     

超声作用下SDS反胶束后萃大豆蛋白的比较研究

本文研究了超声波对十二烷基磺酸钠（SDS）/异辛烷（正辛醇）反胶束体系萃取大豆蛋白后萃过程的强化作用。分析了各种因素对蛋白后萃率的影响,并与未使用超声波辅助反胶束萃取大豆蛋白作了比较。结果表明：采用超声辅助反胶束萃取大豆蛋白,蛋白质萃取率可提高19.59%,且萃取时间大为缩短。使用响应面试验分析得到了超声辅助反胶束萃取大豆蛋白的最佳后萃工艺,并对两种蛋白产品的组分和微观结构进行了分析。     

反胶束法提取红芸豆蛋白的前萃工艺优化

采用二-（2-乙基已基）琥珀酸酯磺酸钠（AOT）-异辛烷-氯化钾组成的反胶束体系萃取红芸豆蛋白（RKBP）。采用电导法考察AOT浓度对AOT-异辛烷-水反胶束体系含水量和临界增溶水量的影响,确定反胶束体系稳定的AOT浓度范围。采用单因素实验分别研究了AOT浓度、缓冲液pH、KCI浓度和萃取时间等因素对RKBP前萃率的影响,通过正交实验优化前萃条件。结果表明,不同AOT浓度对应的反胶束体系的临界含水量值（Wc）基本一致,反胶束体系能够增溶的水的体积随AOT浓度的增加而明显增大,反胶束体系稳定的AOT浓度上限值为2mol／L。正交优化获得反胶束法萃取RKBP的最佳前萃条件为：AOT浓度1．25mol／L,缓冲溶液pH7．5,KCl浓度0．05mol／L,萃取时间90min。在该最优工艺条件下,RKBP前萃率达到43．57％。     

反胶束溶液同时分离大豆蛋白和油脂的前萃研究

研究了用AOT/异辛烷反胶束体系从全脂豆粉同时分离大豆蛋白和油脂。得出前萃蛋白的较好工艺条件:水量按W0=20左右,AOT浓度为0.08g/mL,按2g/100mL加豆粉,180r/min,2h,pH值7.0～8.0,40℃。此时蛋白一次萃取率约50%。结果表明已有的增溶模型不能解释pH对萃取的影响。     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of     

The Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.     

National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the "13~(th) Five-Year Plan"

In Apri Commi major p Plan＂ （h 2014, the National Development and Reform ssion issued an announcement for selection of reliminary research projects for the ＂13th Five-Year ereafter referred to as ＂The Announcement＂）     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the latest scientific     

Contamination of animal feed and food from animal origin with mineral oil hydrocarbons

Oils and fats used for the production of animal feed can become contaminated with mineral oil material originating from gas oils (C₁₈-C₃₅) or synthetic oils (poly alpha olefins, C₂₅ to beyond C₄₅). An important cause is assumed to be the discharge of waste oils, such as motor oil and hydraulic oils. Mineral oil material was analysed by on-line LC-GC-FID directly in the fat or in a raw extract from animal feed or foodstuffs. In Switzerland in summer/autumn 1999 concentrations in oils and fats for feed production were often found to be between 100 and 1000mg/kg. In the feeds, the average concentration was around 100mg/kg with values ranging up to a maximum of 1000mg/kg; few samples were free of contamination. In animal body fat, the average concentration determined in summer 1999 was 25mg/kg, with a maximum of 150mg/kg, although in samples from December 1999, contamination was substantially lower. In the fat phase of eggs, the average concentration was 30mg/kg, with a maximum of 80mg/kg. Paraffin oil is used for feed production, which may account for part of the contamination problem (e.g. eggs).