铁棍山药粗多糖提取工艺条件研究

以水为提取剂,采用水煮醇沉法提取铁棍山药的山药多糖,以水提温度、料液比、浸提时间及乙醇体积分数4个影响因素,研究单因素对粗多糖得率的影响,L9(34)正交试验的结果表明,提取的优化工艺条件为提取温度90℃,提取时间2.5 h,乙醇体积分数75%,料液比1∶6(W∶V),粗多糖得率为6.77%,其中对山药粗多糖提取得率影响最大的因素是提取温度。     

白背三七类黄酮提取工艺条件的优化

采用乙醇提取法研究白背三七类黄酮化合物的提取工艺条件。通过单因素试验和正交试验,考察了乙醇体积分数、料液比、提取温度、提取时间等四个因素对类黄酮得率的影响;优化了白背三七类黄酮的提取工艺条件。结果表明,各因素对类黄酮得率的影响大小依次为乙醇体积分数＞提取温度＞料液比＞提取时间,白背三七类黄酮提取的最优工艺条件为：乙醇体积分数85%,料液比1∶25（g∶mL）,提取时间120 min,提取温度60 ℃。在此最佳提取工艺条件下,类黄酮平均得率为3.81%。     

内部沸腾法提取枇杷叶多糖研究

考察了乙醇体积分数、液料比、提取温度和提取时间4个因素对乙醇溶液提取枇杷叶多糖得率的影响.结果表明:当乙醇体积分数45%、液料比33∶1 (mL/g)、提取温度98℃、提取时间30min时,枇杷叶多糖得率可达6.66%,枇杷叶多糖得率高,且试验重现性好.     

乙醇法提取花生饼中花生衣红色素工艺的研究

旨在探讨乙醇法提取花生饼中花生衣红色素的工艺。以红米红色素标准品浓度为参比计算出的得率为指标,在选取乙醇体积分数、提取温度、提取时间和料液比4个因素进行单因素试验的基础上,再进行正交试验,试验结果经极差分析和方差分析。结果表明:乙醇体积分数、提取温度、提取时间和料液比4个因素对花生饼中花生衣红色素影响差异显著;各因素对花生饼中花生衣红色素提取得率影响的规律为:提取时间料液比提取温度乙醇体积分数(CBAD);乙醇法提取花生饼中花生衣红色素的最佳提取工艺条件为:乙醇体积分数为40%,提取温度为80℃,提取时间为4 h,料液比为1∶7,此时花生衣红色素得率最大。     

乌饭叶中多酚类物质的提取工艺研究

采用醇提法提取乌饭叶中的多酚类物质。通过单因素实验和正交试验,研究料液比、乙醇体积分数、提取时间、提取温度等不同因素水平对乌饭叶中多酚类物质得率的影响,确定最佳提取工艺。结果表明,乌饭叶中多酚类物质提取影响因素主次关系为料液比乙醇体积分数提取时间提取温度,乌饭叶中多酚类物质提取最佳工艺条件为料液比1∶10、乙醇体积分数50%、提取时间2 h、提取温度80℃。该试验条件下乌饭叶提取液中的多酚类物质得率为13.0%。     

山药皮中皂苷提取工艺优化研究

为了增加山药皮利用率,提高山药皮中皂苷得率,以山药皮为原料,采用热回流法提取山药皮中的皂苷化合物。通过单因素试验和正交试验,研究提取温度、提取时间、乙醇浓度和料液比等因素对山药皮皂苷提取效果的影响。结果表明,最佳提取条件为:提取温度45℃、提取时间3 h、乙醇体积分数70%和料液比1∶20,皂苷提取率为0.251%。     

岗稔黄酮苷提取工艺研究

采用单因素试验与正交试验方法，对乙醇提取岗稔黄酮苷的工艺进行了探讨，研究了岗稔皮与乙醇的质量配比（料液比）、提取时间、提取温度以及乙醇体积分数等因素对岗稔黄酮苷提取得率的影响，结果表明最佳提取工艺条件为料液比1：40、提取时间2．5h、提取温度80℃、乙醇体积分数60％。     

油茶果壳多糖的提取及抗氧化作用研究

研究了油茶果壳多糖的最佳提取工艺条件和抗氧化活性。采用油茶果壳为原料,以多糖得率为考察指标,在单因素的结果基础上,通过正交试验,研究了提取时间、提取温度、料水比和乙醇浓度4个因素对油茶果壳多糖得率的影响;并应用TEAC法以及油脂抗氧化体系评价油茶果壳多糖的抗氧化能力。结果表明:提取温度对油茶果壳多糖得率的影响程度达显著水平,提取时间、料水比和乙醇体积分数对油茶果壳多糖得率没有显著影响。油茶果壳多糖的最佳提取工艺条件为:温度90℃,时间1.0 h,料液比1∶15,乙醇体积分数为80%,在此条件下油茶果壳多糖得率为5.93%。油茶果壳多糖具有较好的清除自由基的能力和一定的油脂抗氧化能力。     

杏鲍菇水溶性多糖提取工艺研究

本实验研究了热水浸提法提取杏鲍菇粗多糖的最佳工艺流程及工艺条件。用热水浸提杏鲍菇多糖,乙醇沉淀和Sevage法脱蛋白得到初步纯化的多糖,采用硫酸-苯酚法测定多糖的含量。在单因素试验的基础上,通过正交试验进一步优化提取工艺条件,确定影响杏鲍菇多糖得率的主次因素分别为提取温度、提取时间、料液比和乙醇浓度。结果表明,提取最优工艺为:时间3h,水温为90℃,乙醇的体积为提取液体积的70%,料液比为1:20时多糖沉淀量最大。此工艺条件下杏鲍菇多糖的得率为2.88%。     

桂花树叶多糖提取及抗氧化活性研究

以桂花树叶为原料,用一定体积分数的乙醇溶液浸泡桂花树叶粉末一定的时间,加入一定量一定温度的热水使乙醇在植物组织内部沸腾,提取桂花树叶多糖。考察乙醇体积分数、液料比、提取温度和提取时间4个因素对桂花树叶中的多糖得率的影响。结果表明,乙醇体积分数为33%、液料比为22∶1(mL/g)、提取温度为70℃、提取时间为8 min时,桂花树叶多糖得率可达8.62%,多糖得率高,且试验重现性好,桂花树叶多糖具有良好的抗氧化活性。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

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     

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     

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,