酸性木聚糖酶的应用研究进展

本文综述了酸性木聚糖酶的产生、纯化酶学性质及应用。应用特异性分离纯化方法,可以达到较高纯度。酸性木聚糖酶在pH值4．0以下是稳定的,在酿酒工业和饲料工业有潜在的广泛用途。     

木聚糖酶的研究进展

木聚糖是半纤维素的一种主要成分,是一种多聚五碳糖,广泛存在于各种植物资源中.就木聚糖酶的诱导、木聚糖酶的发酵、木聚糖酶的特性、木聚糖酶的结构、木聚糖酶酶活测定方法、木聚糖酶的基因工程等方面的研究现状和进展进行了综述.(孙悟)     

木聚糖酶的研究进展

木聚糖是仅次于纤维素的第二丰富的可再生资源,通过筛选出产木聚糖酶的菌株,利用基因工程技术,将木聚糖酶基因进行异源表达,提高木聚糖酶产量。该文综述了菌株产生的木聚糖酶酶学性质,并对酶学性质进行改善使木聚糖酶更符合应用的条件,同时研究木聚糖酶分离纯化的步骤,来提高木聚糖酶的酶活。文章重点介绍了木聚糖酶的产生菌和木聚糖酶在基因工程技术等方面研究进展,并对木聚糖酶的分离纯化方法做了简要地介绍。     

微生物木聚糖酶的研究进展

木聚糖是植物半纤维素的主要成分,是仅次于纤维素的第二丰富的可再生资源.木聚糖的结构十分复杂,它的完全降解需要多种水解酶的参与而共同完成,其中β-1,4-内切木聚糖酶(EC 3.2.1.8)能够以内切方式作用于木聚糖主链产生不同长度的木寡糖和少量的木糖,是木聚糖降解酶系中最关键的酶.木聚糖酶在纸浆、食品、饲料等行业上都有广泛的应用.文中综述了木聚糖酶的结构、分类、诱导和生产、应用等.     

微生物木聚糖酶在面包烘培领域应用进展

木聚糖酶(Xylanase)广泛存在于动物、植物、微生物中,但其多存在于细菌、真菌、放线菌等微生物中。木聚糖酶广泛应用于纸质制造、动物食用饲料、酿酒等发酵行业,以及面包烘焙、果汁榨取等食品行业。特别是在面包烘焙领域木聚糖酶可显著降低面团持水能力以及硬度,对面包品质有很大的提升。本文对过去5年发表的木聚糖酶研究成果进行梳理并对有潜力的应用在面包烘焙领域的木聚糖酶进行总结和分析。     

微生物利用木质纤维原料产木聚糖酶研究现状

木聚糖酶在食品、饲料、造纸等领域具有重要的应用价值,而生产成本是决定微生物木聚糖酶能否实现工业应用的关键因素之一.木质纤维原料富含木聚糖,许多能够利用廉价的木质纤维原料诱导产生木聚糖酶的微生物得到了分离,有效地降低了酶制剂的生产成本.综述了微生物利用木质纤维原料产木聚糖酶的研究现状,重点关注了微生物木聚糖酶的产生、特性...     

木聚糖酶研究进展

木聚糖酶是目前应用非常广泛的一种工业酶。其在饲料、食品、造纸及能源等领域发挥越来越大的作用。本文综述了木聚糖酶的生化特性、发酵方式、现代生物技术在木聚糖酶研究方面的应用以及酶的纯化。     

木聚糖酶在食品中的应用及其发展趋势

木聚糖是半纤维素的一种重要组成成分,广泛存在于各种植物资源中。木聚糖酶是木聚糖的水解酶,它在食品、饲料、造纸等工业上有着非常广泛的应用。本研究就木聚糖酶在食品中的应用范围、作用特点及其机理进行了简要的阐述。     

微生物木聚糖酶及其应用

木聚糖(Xylan)是植物半纤维素的主要成分,是一种复杂的多聚五碳糖。木聚糖酶(Xylanase,EC 3.2.1.8)以内切方式作用于木聚糖主链,产生不同链长的寡糖和少量的木糖,是木聚糖降解酶系中最为关键的酶。本文综述了微生物木聚糖酶系统、微生物木聚糖酶的分类及其来源分布、微生物木聚糖酶的特性、产生及在食品、造纸、饲料行业的应用。     

微生物酸性木聚糖酶及其应用的研究进展

木聚糖酶来源广泛,微生物酸性木聚糖酶作为木聚糖酶的一种,目前人们对其研究较少。文中介绍了产酸性木聚糖酶微生物菌株的来源,包括天然菌株和基因工程菌株;讨论了不同来源菌株发酵产酸性木聚糖酶的影响因素;总结了酸性木聚糖酶的纯化方法及纯酶性质并研究酶的结构特征与其耐酸性的关系,综述了酸性木聚糖酶在实际生产中的应用现状。     

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,     

Anti-mutagenic compounds from corn

In previous studies with aflatoxin-contaminated corn an uncharacteristic response for AFB₁ in the Salmonella/microsomal mutagenicity assay (Ames test) was observed and the presence of anti-aflatoxin factors in the corn was suggested. In the current study, corn was extracted and fractionated using thin layer chromatography (TLC) using different developing solvent systems and the Ames test was used to monitor for anti-mutagenic activity in the corn fractions. Both Salmonella tester strains TA98 and TA100 with metabolic activation (S9) were used. Several corn fractions, at different stages in the isolation and purification process, showed anti-mutagenic dose-responses when exposed to pure AFB₁. Corn extracts were non-toxic to the tester strains and TLC fractions that showed the best anti-mutagenic dose-responses were selected for further partial characterization analyses.