辣木叶总黄酮乙醇提取工艺的研究

对辣木叶中总黄酮的乙醇提取工艺进行了研究。探讨乙醇浓度、浸提温度、料液比、浸提时间、浸提次数对辣木叶中总黄酮提取效果的影响，在单因素试验的基础上,通过正交试验确定最佳提取工艺条件。结果表明：辣木叶中总黄酮类物质的最佳提取条件为70％的乙醇溶液作提取剂，提取温度60℃，料液比1：20，提取3次，每次1h，在此条件下，提取液中的总黄酮含量达到3．95％。     

树莓叶黄酮类物质提取工艺条件优化

采用单因素实验和正交实验，研究微波提取法提取树莓叶中的黄酮类物质最佳提取工艺条件，结果表明：微波提取法提取树莓叶中总黄酮的最佳提取条件为：提取时间3min，料液比1g：40mL，乙醇体积浓度50％，功率250W，得率为5．81％。     

无花果叶、番石榴叶中黄酮类化合物的提取与测定

黄酮是治疗糖尿病的重要天然有机成分。选用乙醇冷浸提与超声波相结合的方法提取，进行了条件试验，用70％的乙醇冷浸提12h，料液比选取1：50，超声波额定频率为40kHz，提取时间为40min。并且采用分光光度法测定了无花果叶、番石榴叶中黄酮类化合物的含量，并与国内多个地区银杏叶中黄酮类化合物的含量比较。结果表明：番石榴叶中黄酮类化合物含量为1．27％，无仡果叶中黄酮类化合物含量为0．64％，比银杏叶中的黄酮类化合物含量高。无花果叶、番石榴叶等有待进一步开发。     

丝瓜叶中总黄酮的醇提工艺优化研究

丝瓜叶中含有丰富的黄酮类化合物。采用分光光度法,以芦丁为标准品,测定丝瓜叶中总黄酮的含量。结果显示:乙醇提取法最佳工艺组合为A1B3C3D3,即乙醇浓度30%,提取时间3h,料液比1g∶50mL,提取温度60℃。研究结果可为利用丝瓜叶工业化生产黄酮类药用成分提供科学依据。     

香椿叶黄酮类化合物提取的研究

在单因素实验的基础上探讨了香椿叶黄酮类化合物提取的最佳工艺参数.研究结果表明：影响香椿叶黄酮类化合物提取率的大小次序先后为：乙醇浓度＞乙醇用量＞提取时间＞提取温度,提取黄酮类化合物提取的优化工艺参数为：乙醇浓度50%、乙醇用量50mL、提取温度65℃、提取时间45min,在这个最佳条件下试验,黄酮类化合物提取率为7.521%.     

超声波提取鱼腥草叶总黄酮优化工艺研究

用超声波提取,通过L9（3^4）正交试验，探讨了提取条件对鱼腥草（Houstonian cordata Thunb）叶黄酮类物质提取量的影响。结果：各试验因素列鱼腥草叶黄酮类物质提取量的影响依次为提取时间、提取功率、乙醇浓度、提取溶剂配比。     

从西芹中提取黄酮类物质最佳条件的研究

采用乙醇有机溶剂提取法,分别提取西芹叶和茎中的黄酮类物质,并用分光光度法测定黄酮类物质的含量.再通过对提取温度、回流时间、物料比、乙醇浓度四个提取因素筛选,最后通过正交实验得出西芹叶子中提取黄酮类物质最佳条件是:提取温度85℃,回流时间3h,物料比1:20,乙醇浓度85%;茎中提取黄酮类物质最佳条件是:提取温度75℃.回流时间3h,物料比1:12,乙醇浓度90%.     

黄瓜黄酮类化合物的抗氧化作用

以70%乙醇为溶剂提取黄瓜黄酮类化合物,并对其黄酮含量进行测定;采用水杨酸比色法测定黄瓜中黄酮类化合物对羟基自由基的清除效果.结果表明:黄瓜中含有黄酮类化合物;且黄瓜中黄酮类化合物对羟基自由基有明显的清除效果,清除率达63.95%.     

柿叶黄酮类物质的乙醇提取工艺及其抗氧化性的研究

研究了用乙醇提取柿叶中黄酮类物质的工艺条件，并对其进行了抗氧化性能的初步探讨。通过正交试验得出了柿叶中黄酮类物质的提取工艺在提取时间为3h条件下的最佳参数组合为：乙醇浓度为80％，料液比为1：25，提取温度为85℃。抗氧化试验表明柿叶中黄酮类物质可有效地延缓油脂脂质过氧化反应，其抗氧化性明显优于Vc和茶多酚，表明黄酮类物质是一种很有潜力的天然、安全、高效的油脂抗氧化剂。     

不同时期菊芋叶黄酮类物质分析及抗氧化性研究

本文以菊芋叶片为原料，首先通过正交实验设计探讨了菊芋叶片黄酮类化合物的最佳提取工艺条件，然后对不同时期叶片中的黄酮类物质进行了分析，最后对分离得到的黄酮类化合物进行了抗氧化性研究。结果发现：乙醇浓度为60％，料液比为1：35，提取温度为70~C，提取时间为2,5h，黄酮类化合物得率最高，达2．830％；对不同时期、不同部位叶片的研究发现，八月下旬、位于植株顶端的菊芋叶中黄酮类化合物含量最高。抗氧化性实验表明，菊芋叶中的黄酮提取物对羟自由基有一定的清除作用。     

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,     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.