甜高粱秸秆固态发酵生产燃料乙醇的工艺研究

利用选育的耐酸耐高温酵母Q-10,采用甜高粱秸秆固态发酵生产燃料乙醇.当接种量为5%,发酵温度34℃,发酵起始pH4.0,糖化酶和纤维素酶用量分别为50U/g原料和20U/g原料,发酵周期4d时,乙醇体积分数达到6.5%.小试试验乙醇体积分数达到6.4%.工业试验乙醇体积分数达到6.0%.     

原生质体融合子发酵玉米秸秆水解液生产燃料乙醇的试验研究

对由原生质体融合技术获得的融合子F10进行了玉米秸秆水解液的发酵试验研究,结果表明,融合子F10对玉米秸秆水解液中葡萄糖和木糖的利用率远高于亲本D-12,发酵醪中乙醇浓度最高达到1．1％（v／v）,明显高于双亲P-01（0．6％）和D-12（0．3％）。说明融合子F10可以用于发酵玉米秸秆水解液生产燃料乙醇。     

甜高梁秆固态发酵制取酒精的研究

甜高粱秆液态发酵中，存在着榨汁难，糖分损失严重等问题。采用固态发酵的方式，进行了甜高粱发酵酒精的研究，确定了发酵过程中发酵时间、接种率、初始pH、营养盐等因素的优化方案。将总糖含量为13％，含水量约80％的甜高粱秆直接绞碎至约0．3cm长，在最佳优化条件下35℃固态发酵24h，酒精的理论产率为0．332g乙醇／g甜高粱秆干料，实际得率为0．298g乙醇／g甜高粱秆干料（达到理论产率的89．8％），生产It酒精需要3．01t的甜高粱秆干料。     

戊糖和己糖共发酵生产燃料乙醇发酵体系优化研究

研究了戊糖和己糖共发酵生产燃料乙醇发酵体系的影响因素．正交试验获得的最佳发酵体系为：在基础发酵培养基中添加φ（Tween-80）=0．025％，ρ（聚乙烯醇4000）=100g／L，p（L-谷氨酰胺）：0．625g／L．在此条件下，发酵至72h时，乙醇产率为43、56％.     

混合菌同步糖化共发酵造纸污泥产乙醇

对酿酒酵母（Saccharomyces cerevisiae）与重组大肠杆菌K011（Escherichia coli）混合菌同步糖化共发酵造纸污泥产乙醇进行了初步研究。在底物浓度为50g／L时,通过单因素实验和正交实验获得乙醇发酵的最佳条件：纤维素酶添加量25FPU／g底物,接种量为6％,酿酒酵母与重组大肠杆菌K011接种比例为1：1（细胞干重初始浓度分别为1．0g／L和0．3g／L左右）。发酵72h后,乙醇浓度为5．71g／L,产率达到0．114g乙醇／g污泥,达到理论值的42．5％。分别用酿酒酵母、K011单菌种发酵与双菌株组合发酵对比结果表明,混合菌发酵效果明显优于单菌种发酵。     

混种固定化细胞发酵海藻豆乳醋酸饮料的研究

以海藻汁液和大豆浆混合液为原料，固定化清酒酵母或产香酵母A-2于25℃或30℃发酵12h，再接种固定化醋酸杆菌于35℃发酵18h，发酵液经过滤后，制成海藻豆乳醋酸饮料，经测定该饮料总酸含量为4．2g／L-4．5g／L，总酯含量为1．6g／L-1．8g／L，乙醇含量为0．83%-0．86％（v／v），碘含量为15mg／L-16mg／L。     

水稻秸秆同步糖化发酵生产燃料乙醇的研究

研究了培养基起始pH、发酵时间、发酵温度、酵母接种量和吐温80对水稻秸秆同步糖化发酵产乙醇的影响。结果表明,酵母接种量能有效地提高发酵液中乙醇的产率。水稻秸秆同步糖化发酵生产燃料乙醇的适宜发酵工艺条件为：起始pH值为4．0～4．5,培养温度为32℃,接种量为12％,发酵时间12-24h。在此条件下,生成乙醇的浓度为1．4mg／mL,水稻秸秆原料的乙醇转化率达7．02％。     

利用稻草粉酶解产乙醇的初步研究

利用稻草研究了糖化发酵生产乙醇的工艺。在糖化、发酵二步工艺中，采用正交试验，得出了台湾酵母利用稻草粉水解液发酵产乙醇的最佳培养条件：起始pH5．0，接种量15％，培养时间48h，培养温度为30℃。乙醇浓度可以达到3．105％（v／v）。     

生物反应器操作参数对秸秆固态发酵酒精的影响

在转鼓式生物反应器中，研究了搅拌频率、通气速率对秸秆发酵产纤维素酶和酒精的影响，试验的结果表明：搅拌频率为10min／4h能保证生物量和产酶达到最大，而搅拌对生物量和酵母酒精产量影响很小；通气速率达到3．0vvh时，生物量最大达0．31g／g，酶活达到170U／g(干基)；对转轴及转鼓式反应器的效果进行了初步的比较。     

少孢根霉固态发酵β-葡萄糖酶关键单元优化研究

研究了黄豆芽液体培养基制备少孢根霉生产菌种的工艺条件，即100mL黄豆芽汁，3g麦芽糖，1％硫酸铵和0．4％尿素，用乳酸调节pH值为4．5，接种1．5g少孢根霉制剂，37℃振荡培养24h后再用大豆粉和马铃薯固态培养基，即大豆粉和马铃薯的比例为5：1，9％乳酸酸化（含乳糖0．2g／10g（干基）、硫酸铵0．2g／10g（干基），以少孢根霉作为发酵菌种，于30℃培养48h，发酵生产β-葡萄糖苷酶，其酶活达到716U／g。     

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.