油茶饼粕中茶皂素的提取及其在洗涤剂中的应用初探

以油茶饼粕为原料,研究了超声波法提取茶皂素的工艺过程。得出较佳工艺参数为：超声频率20kHz,料液比1：4,超声提取时间20min,乙醇浓度80％,提取溶液温度50℃,在此条件下茶皂素的提取率为96．3％。考察了产品在洗涤剂中的应用效果：将制备的茶皂素与过硼酸钠复配后．有较好的试验效果：     

油茶果壳鞣质提取工艺及降血糖功能研究

目的：研究油茶果壳鞣质的提取工艺及降血糖功能。方法：以紫外分光光度法测定含量,采用正交设计实验优化油茶果壳中鞣质的提取工艺。油茶果壳鞣质制备后,以400mg/（kg.d）的剂量灌胃。结果：确定优化工艺为：超声辅助提取80min,固液比1：20,乙醇浓度50%,油茶果壳中鞣质含量为6.75%。油茶果壳鞣质可明显降低糖尿病小鼠空腹血糖。结论：优化工艺条件可以有效提取油茶果壳中的鞣质,工艺操作简单合理。油茶果壳鞣质是潜在的降糖功能因子。     

豆粕中大豆皂苷提取工艺的研究

对豆粕中大豆皂苷的提取工艺进行了研究,通过正交试验确定了从豆粕中提取大豆皂苷的最佳工艺条件,即提取温度80℃、乙醇浓度60％、料液比为1：20、提取时间2h,提取2次,提取物中皂苷的提取率可达到92．80％。     

陶瓷膜纯化油茶皂苷的工艺研究

目前市售油茶皂苷多为乙醇提取物,这些提取物多为粗提物,色泽比较深,纯度相对低,并且杂质成分复杂.在前人的基础上采用陶瓷膜对油茶皂苷进行分离纯化研究.选取不同的膜孔径、不同的操作压力以及不同的料液浓度为粗油茶皂苷精制的工艺条件,以膜通量、总皂苷转移率和除杂率为标准对陶瓷膜精制油茶皂苷的工艺进行优化.结果表明,以0.05 pan的膜孔径、0.15 MPa的操作压力和1%的料液浓度为最佳精制工艺条件,得到的滤液经过浓缩并喷雾干燥.同时对过滤后的产品进行高效液相色谱法检测.测定产品纯度由50%提高到81%,得率为66.4%,并且颜色也从黄色变为淡黄色.具有大规模工业生产的可行性.     

油茶总皂苷提取工艺优化

油茶皂苷是从油茶籽饼粕中提取出的一种皂类，存在于油籽种子和叶中的皂苷成分，其基本结构由三萜皂苷、结构糖、结构酸组成，其配基为五环三萜类结构。目前工业上对油茶皂苷的提取主要有水浸提和溶剂抽提两种方法。水浸提法溶剂成本低廉，但产品含量不高，色泽深，且能耗较高，现已基本淘汰；溶剂抽法一般采用甲醇、乙醇、正丁醇为抽提溶剂，能有效提高产品的纯度，     

果胶酶提取绞股蓝皂苷的工艺研究

为进一步研究绞股蓝皂苷的提取工艺条件,利用果胶酶提取绞股蓝皂苷,本文分析了不同酶用量、不同pH值、不同酶解温度、不同酶解时间对绞股蓝皂苷提取得率的影响,并利用正交法优化该提取工艺,然后按此工艺条件进行提取后,采用水浴加热提取和灭酶,在不同的时间条件下,考察了加热后绞股蓝皂苷得率的变化情况。最终确定果胶酶提取绞股蓝皂苷的最佳工艺为：果胶酶用量为0．35％,pH值为4．0,酶解温度为50℃,酶解时间为90min,高温灭酶提取16min。在此工艺条件下皂苷得率达7．9201％,在常规水酶法提取基础上增加了9．4148％,相对标准偏差RSD为0．9764％,提取结果稳定,符合工业化生产要求。     

大火草总皂苷提取工艺及抗肿瘤活性研究

研究大火草总皂菅的提取工艺及其体外抗肿瘤滑性。采用单因素及正交试验法，以大火草总皂苷提取量为指标，对大火草总皂苷的提取工艺进行优化。用MTT法考察大火草总皂苷对人宫颈癌细胞Hela的增殖抑制影响。大火草总皂苷提取的最佳工艺为：乙醇浓度65％，料液比120，提取时间210min，温度75℃。经验证实验得总皂苷提取率为29．03％，相比正交实验结果中的较优组28．83％提高了0．69％。该皂苷对人宫颈癌细胞Hela没有明显的增殖抑制怍用。     

絮凝-沉淀法制备油茶皂素工艺研究

以水酶法制取油茶籽油后的水相为原料,采用絮凝-沉淀法提取其中的油茶皂素.单因素实验得出适宜的絮凝条件为:1％的壳聚糖溶液加入量为水相体积的16％,此时油茶皂素的损失率为22.24％.应用正交实验确定沉淀-转化的最佳工艺为:在絮凝离心分离后的水溶液中,加入质量3％的氧化钙,在20℃下沉淀6h,离心后,加入转化剂碳酸氢铵(加入量为2.5倍的氧化钙量),40℃下释放0.5h,最终得到纯度为80.25％的油茶皂素.此法在提高产品纯度的同时,浓缩了油茶皂素水溶液,降低了能耗.     

CO_2超临界萃取油茶皂苷的研究

研究了CO2 超临界流体萃取油茶皂苷的工艺 ,确定最佳萃取条件为 ,压力 2 5MPa、温度 5 0℃、体积分数6 5 %乙醇为夹带剂 ,CO2 流量 2 5～ 30L/h ,萃取时间 3h。在最佳萃取条件下油茶皂苷的收率为 15 2 3% ,纯度78 6 5 %。与乙醇浸提法相比较 ,超临界萃取皂苷的纯度比乙醇浸提法高 5 4 % ,且工艺简单。     

油茶饼粕中茶皂素的提取及H2O2法脱色条件研究

通过有机溶剂浸提,研究并确定了从油茶饼粕中提取茶皂素的最佳工艺：乙醇体积分数70％,料液比（g：mL）1：4,提取时间3h,提取温度75％2;H2O2法脱色的最佳条件为pH值8.5,脱色温度70℃,脱色时间2h,加入H2O2 25mL。在此条件下提取的茶皂素得率为17.2％,纯化后的茶皂素质量分数达到87.4％。     

Textural Properties of Cold-set Gels Induced from Heat-denatured Whey Protein Isolates

A 9% whey protein (WP) isolate solution at pH 7.0 was heat-denatured at 80°C for 30 min. Size-exclusion HPLC showed that native WP formed soluble aggregates after heat-treatment. Additions of CaCl2 (10–40 mM), NaCl (50–400 mM) or glucono-delta-lactone (GDL, 0.4–2.0%, w/v) or hydrolysis by a protease from Bacillus licheniformis caused gelation of the denatured solution at 45°C. Textural parameters, hardness, adhesiveness, and cohesiveness of the gels so formed changed markedly with concentration of added salts or pH by added GDL. Maximum gel hardness occurred at 200 mM NaCl or pH 4.7. Increasing CaCl2 concentration continuously increased gel hardness. Generally, GDL-induced gels were harder than salt-induced gels, and much harder than the protease-induced gel.     

Occurrence of bisphenol-F-diglycidyl ether (BFDGE) in fish canned in oil

The levels of bisphenol-F-diglycidyl ether (BFDGE) were quantified as part of a European survey on the migration of residues of epoxy resins into oil from canned fish. The contents of BFDGE in cans, lids and fish collected from all 15 Member States of the European Union and Switzerland were analysed in 382 samples. Cans and lids were separately extracted with acetonitrile. The extraction from fish was carried out with hexane followed by re-extraction with acetonitrile. The analysis was performed by reverse phase HPL C with fluorescence detection. BFDGE could be detected in 12% of the fish, 24% of the cans and 18% of the lids. Only 3% of the fish contained BFDGE in concentrations considerably above 1mg/kg. In addition to the presented data, a comparison was made with the levels of BADGE (bisphenol-A-diglycidyl ether)analysed in the same products in the context of a previous study.     

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.     

Contribution of European research to risk analysis

The European Commission's, Quality of Life Research Programme, Key Action 1—Health, Food & Nutrition is mission-oriented and aims, amongst other things, at providing a healthy, safe and high-quality food supply leading to reinforced consumer confidence in the safety of European food. Its objectives also include the enhancing of the competitiveness of the European food supply. Key Action 1 is currently supporting a number of different types of European collaborative projects in the area of risk analysis. The objectives of these projects range from the development and validation of prevention strategies including the reduction of consumers risks; development and validation of new modelling approaches; harmonization of risk assessment principles, methodologies, and terminology; standardization of methods and systems used for the safety evaluation of transgenic food; providing of tools for the evaluation of human viral contamination of shellfish and quality control; new methodologies for assessing the potential of unintended effects of genetically modified (genetically modified) foods; development of a risk assessment model for Cryptosporidium parvum related to the food and water industries; to the development of a communication platform for genetically modified organism, producers, retailers, regulatory authorities and consumer groups to improve safety assessment procedures, risk management strategies and risk communication; development and validation of new methods for safety testing of transgenic food; evaluation of the safety and efficacy of iron supplementation in pregnant women; evaluation of the potential cancer-preventing activity of pro- and pre-biotic ('synbiotic') combinations in human volunteers. An overview of these projects is presented here.     

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.