国产DDGS营养成分研究

通过对乙醇生产中的副产物——含可溶性溶解物的干酒精糟(DDGS)营养成分的测定研究,分析了不同原料来源和不同加工工艺条件下生产的DDGS在色泽和营养成分方面的差异。通过检测和分析发现:DDGS的亮度与黄色度和粗脂肪含量呈正相关,相关系数分别为0.9905和0.9505;与NDF、ADF、非植酸磷呈负相关,相关系数分别为-0.9685、-0.9573和-0.9924;黄色度值与粗脂肪、NDF、ADF、非植酸磷含量的相关系数分别为0.9023、-0.9830、-0.9779和0.9789。结果表明,有可能通过色泽指标对DDGS营养价值进行快速评价;同一来源不同批次的DDGS一致性较好,但不同来源的DDGS存在很大差异,这种差异与加工工艺有关,DDGS总磷中非植酸磷含量达85%～98%,表明DDGS磷的可利用率高;DDGS粗蛋白质含量在28.44%以上,故可作为蛋白质原料使用,但由于其氨基酸平衡较差,使用时必须额外补充合成氨基酸。     

关于提升玉米DDGS质量的研究

分析了公司玉米DDGS产品质量存在的问题,确定了攻关目标,通过改善玉米DDGS色泽,优化DDGS粗蛋白含量,有效提高了玉米DDGS产品质量。     

两种玉米毛油的成分对比分析

分别测定了玉米酒糟(DDGS)毛油及玉米胚芽毛油中的脂肪酸组成、酸值、生育酚组成及含量、玉米黄色素含量、甾醇及谷维素含量,以及在120℃的氧化稳定性.结果表明:两种玉米毛油的脂肪酸组成相近,DDGS毛油中生育酚、谷维素、植物甾醇、玉米黄色素平均含量分别达到1 475.7μg/g、814.1 μg/g、14.50 mg/g、247.7 μg/g,都较玉米胚芽毛油高,在DDGS毛油中未发现酵母特有的麦角甾醇.另外,DDGS毛油的氧化诱导期时间较长,氧化稳定性好.     

脱脂对燕麦淀粉理化性质影响研究

研究了燕麦粉的脱脂条件和脱脂对燕麦淀粉性质的影响.结果表明:燕麦粉脱脂条件为料液比为1∶4,脱脂时间4h;燕麦淀粉经脱脂后粗脂肪和损伤淀粉含量分别降低81.3％、26.9％;燕麦破损淀粉含量由4.64％下降至3.63％;燕麦淀粉经脱脂透光率增加、沉降体积变小、冻融吸水率下降;经脱脂后燕麦淀粉溶解度下降,膨润力变高;经脱脂燕麦淀粉峰值黏度升高,谷值黏度基本不变,衰减值、最终黏度、回生值、糊化温度均有所下降.     

DDGS色泽测定及其与质量关系初探

采用Hunter Lab测色仪测定DDGS颜色色值,并对不同型号的测色仪测色结果作了比较,研究色值和DDGS质量指标的关系。结果表明,不同型号Hunter Lab测色仪测得的DDGS Hunter L色值趋势一致,数值相差0.2～3.5个单位。DDGS色值和质量的具体关系表现为,对于同种原料DDGS的Hunter L色值和脂肪含量呈负相关。黄色的DDGS比暗棕色的DDGS的蛋白质和粗纤维含量高。色值与质量的相关性更多是与DDGS原料和其生产工艺有关。     

玉米酒糟(DDGS)—极具潜力的优质食用油新资源

玉米酒糟(DDGS)主要是生产燃料乙醇的副产品,研究比较了玉米仁油、玉米皮油、玉米胚芽油中甾醇、生育酚的不同组成及含量,综述了玉米酒糟(DDGS)油中微量成分甾醇和生育酚的含量、组成及研究进展,分析了DDGS玉米油的营养特点及其制炼油加工的经济效益,指出玉米酒糟(DDGS)油中脂肪伴随物丰富且含量很高,经济加工效益明显,是一种极具潜力的优质食用油新资源,如能合理充分制油,可得到30～50万吨优质玉米油,缓解中国目前食用油油脂资源缺乏的紧张状况.     

玉米DDGS的营养成分及质量评价

玉米DDGS主要是生产乙醇的副产品,综述了玉米DDGS中含的蛋白质、脂质、纤维、磷等营养组成,并根据颜色、酸性洗涤纤维（ADF）含量、霉菌毒素含量、脂肪酸败程度等指标对DDGS进行质量评价。     

降低陈化小麦或酒精发酵DDGS中黄曲霉毒素B_1含量的研究

对陈化小麦原料及酒精发酵DDGS中的黄曲霉毒素B_1(AFB_1)的脱毒进行了研究,发现在发酵起始阶段添加终浓度100~400 mg/L FermaSure能够显著降低DDGS中的AFB1含量,同时直接用400 mg/L FermaSure处理原料或DDGS,AFB_1含量分别降低42%,50%。为原料及DDGS的脱毒提供了一种很好的选择和参考。     

脱脂麦胚蛋白的制取和理化及其功能特性的研究

本文用碱提取后等电点沉淀法制取了脱脂麦胚蛋白 ,并对其理化和功能特性进行了研究。结果表明 :脱脂麦胚蛋白氨基酸含量高达 2 6 .793g/ 10 0g ,且种类齐全 ,八种必需氨基酸含量均较高 ;脱脂麦胚蛋白的等电点为 4 .0 ,pH >6 .0时蛋白质溶解指数NSI值可达 70 % ,具有较高的溶解度 ;脱脂麦胚蛋白的乳化活性EA和乳化稳定性ES与牛血清白蛋白近似 ,并略高于酪蛋白 ;脱脂麦胚蛋白具有很好的起泡性FC ,其泡沫稳定性FS稍差 ,但可通过物理、化学或酶处理方法来克服 ;脱脂麦胚蛋白具有非常理想的持水性WR ,在pH=8.0和温度 70℃时有最高持水性。     

鲐鱼鱼片与鱼糜脱脂方法的筛选研究

分别采用蒸馏水漂洗(A)、0.3%NaCl漂洗(B)、0.4%NaHCO3漂洗(C)、脂肪酶(D)(pH8.7～9.2,温度32℃,酶液活度40U.mL-1,酶液与底物体积比为5∶1)和蒸馏水漂洗后离心(E)(离心速度8000r/min,温度25℃)五种脱脂方法对鲐鱼鱼片和鱼糜进行脱脂实验,脱脂时间均为30min,用残脂率、蛋白质含量、弹性和白度来衡量脱脂效果。研究结果表明:对鱼片,残脂率为A>B>E>D>C,方法C脱脂后的残脂率最低,白度最高,方法D脱脂后的蛋白质含量最高,五种脱脂法脱脂后的弹性无显著差异;对鱼糜,残脂率为A>B>C>D>E,方法E脱脂后的残脂率最低,方法B和C脱脂后的白度最高,弹性最好,五种脱脂法脱脂后的蛋白质含量无显著差异。     

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.