花生粕固态发酵生产高蛋白饲料菌种的筛选

选用产朊假丝酵母、热带假丝酵母、酿酒酵母、米曲霉、黑曲霉、康宁木霉、绿色木霉、里氏木霉对花生粕进行混菌固态发酵实验,以各组合发酵产物粗蛋白含量及回收率为指标,筛选出最佳菌种组合。结果表明,绿色木霉、米曲霉和酿酒酵母(接种比例为1∶1∶1)为最佳菌种组合,其发酵产物的粗蛋白含量为61.63%,显著高于未发酵的花生粕中粗蛋白含量,且通过氨基酸分析发现,发酵产物的营养价值也相应提高。     

甜橙皮渣发酵蛋白饲料的研制

利用甜橙加工制汁后的废料———甜橙皮渣进行固态发酵制作蛋白质强化饲料。通过对发酵饲料样品的相关营养成分分析测定等方式筛选菌种、优化发酵条件,即经过单菌试验初步筛选出5株优良菌种,进行3种菌的混合固态发酵,找出适宜该皮渣发酵的优势菌种组合,并对发酵条件进行了优化设计,结果为:添加15%左右的麸皮;在温度29℃左右,pH自然下培养4~5d;混菌接种比为黑曲霉(2281)∶康宁木霉(13016)∶产朊假丝酵母(1807)=1∶2∶3。该饲料样品的粗蛋白含量比相应对照高出近80%,是纯皮渣对照样粗蛋白(绝干含量)的3~4倍。此强化蛋白饲料未添加任何无机物或有机氮,全天然,无污染。     

三七渣固态发酵生产蛋白饲料

以三七渣为原料,利用康宁木霉固态发酵生产蛋白饲料,考察了培养条件对康宁木霉固态发酵三七渣的影响,采用正交试验优化了发酵条件.研究结果表明,最佳发酵条件为氮源添加量为40mg硫酸铵/g干药渣、固液比1.0:1.5、发酵时间5d、原料粒径80目,在上述发酵条件下,三七渣中真蛋白含量由9.97%提高至19.40%,粗纤维含量从27.45%降低至11.91%.     

刺梨果渣发酵饲料蛋白的工艺研究

以刺梨果渣为原料发酵生产饲料蛋白。研究以发酵产物中蛋白含量为指标,通过混合菌种进行发酵,筛选出最佳菌种比例,并通过单因素试验和正交试验得到混合菌发酵的最佳工艺条件。结果显示,最佳菌种组合为白地霉/康宁木霉/热带假丝酵母（2∶1∶2）,产物中蛋白质含量为14.87%;混合菌发酵的最佳工艺条件为尿素添加量2%,装料量50 g/250 m L,料液比1∶1（g∶m L）,接种量17%,发酵温度30℃,发酵时间5 d。发酵产物中蛋白质含量较未发酵果渣提高了175.8%,游离氨基酸含量提高了56.3%,可溶性膳食纤维提高了37.34%,适口性得到改善,同时具有刺梨的特殊香味,适合作为饲料添加剂。     

马铃薯渣高效降解菌的驯化、发酵试验及菌粉制备

以马铃薯渣为主料,以选育马铃薯渣高效降解菌为目的,利用梯度法对康宁木霉40144进行定向驯化,并对驯化后的菌株进行发酵试验。结果表明,在发酵条件下,康宁木霉的纤维素酶活提高了2．94倍,发酵培养基的含糖量提高了1．34倍,含氮量提高了1．5倍。驯化的菌株有良好的降解马铃薯渣的能力。将驯化后的菌株制成菌粉,经涂布检测表明,菌粉中的活菌数量可达1．3×10^7个／g,冻干发酵剂可直接应用于马铃薯渣的发酵生产。     

激光选育混合菌发酵苹果渣生产饲料蛋白

利用自制的半导体激光辐射器对果酒酵母（Cider utilis)、康宁木霉（Trichoderma reesi)两菌种进行辐射诱变，选育出适合苹果渣生产饲料蛋白的更优突变株。并在此基础上研究协同发酵的单因素影响关系，获得了固态发酵的适宜工艺条件：发酵的接种比4：1、接种量10％、发酵温度30－40℃、自然pH值、尿素与无机盐分两次添加、不灭菌。经84h发酵，其结果产物中的粗蛋白含量由16.28%提高到28.43%，真蛋白含量由10.02%提高到26.59%，而粗纤维则由16．68％降低到10．84％。     

复合菌生物转化白酒糟发酵条件的优化

以未发酵白酒糟培养基为对照组,探讨不同菌种组合以及发酵条件对固态发酵白酒糟中蛋白含量的影响,旨在提高酒糟中真蛋白的含量。选用枯草芽孢杆菌、白地霉和产朊假丝酵母对白酒糟进行单菌和复合菌发酵实验,结果显示三菌组合发酵效果最好。通过三菌单因素发酵试验及正交试验确定最佳发酵条件为：添加15%的麸皮和2%的尿素,先接种5%的枯草芽孢杆菌和10%的白地霉30 ℃培养24 h,然后接种5%的产朊假丝酵母30 ℃培养72 h,此时真蛋白的含量为24.85%,粗蛋白含量达32.09%,粗纤维含量降低到17.66%。     

出芽短梗霉固态发酵啤酒糟制备阿魏酰低聚糖和膳食纤维工艺研究

以啤酒糟为试验材料,研究固态发酵制备阿魏酰低聚糖和膳食纤维的最佳发酵工艺条件。以阿魏酰低聚糖和可溶性膳食纤 维含量为评价指标,选择木聚糖、尿素、磷酸二氢钾为影响因素,通过正交试验确定最佳固态培养基配方。在接种量、发酵时间和发酵 温度3个单因素试验的基础上,利用响应面法优化出芽短梗霉发酵啤酒糟的发酵工艺条件。结果表明,固态发酵的最佳培养基配方为 木聚糖6%、尿素4%和磷酸二氢钾1%;最佳固态发酵条件为接种量12%、发酵时间4 d和发酵温度29 ℃。在此优化条件下,阿魏酰低聚 糖含量和可溶性膳食纤维含量都达到最高,分别为37.67μmol/L和23.76%。     

激光选育混合菌发酵苹果渣生产饲料蛋白

利用自制的半导体激光辐射器对果酒酵母(Cider utilis)、康宁木霉(Trichoderma reesi)两菌种进行辐射诱变,选育出适合苹果渣生产饲料蛋白的更优突变株.并在此基础上研究协同发酵的单因素影响关系,获得了固态发酵的适宜工艺条件发酵的接种比4∶1、接种量10%、发酵温度30～40 ℃、自然pH值、尿素与无机盐分两次添加、不灭菌.经84 h发酵,其结果产物中的粗蛋白含量由16.28%提高到28.43%,真蛋白含量由10.02%提高到26.59%,而粗纤维则由16.68%降低到10.84%.     

多菌种混合发酵马铃薯渣产蛋白饲料

马铃薯渣是马铃薯淀粉生产加工过程中产生的副产物。通过微生物发酵可有效改善马铃薯渣的营养价值,从而提高其饲用价值。该文通过研究菌种对发酵马铃薯渣饲料中粗蛋白、粗纤维含量及蛋白酶活、纤维素酶活的影响,为发酵马铃薯渣生产蛋白饲料提供科学依据。采用8株菌种对废马铃薯渣进行固态发酵,以未接菌种的培养基为对照,通过单一菌种、双菌组合、菌种比例的发酵试验,对发酵产物中粗蛋白、粗纤维含量及蛋白酶活、纤维素酶活进行分析。结果表明,黑曲霉Z9和啤酒酵母PJ组合为最佳菌种配伍,且当菌种比例为1∶1时,粗蛋白含量为41.72%,蛋白酶活为1 344.93 U/g,纤维素酶活为120.87 U/g,分别比对照组含量提高了78.69%、296.74%和1 473.77%;粗纤维含量为8.47%,比对照组降低了31.96%。     

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.