鸭儿芹护色工艺条件优化

以新鲜鸭儿芹为原料,利用碱液漂烫和护色剂对鸭儿芹进行护色,根据色泽和质地的感官评分,研究漂烫条件、护色剂种类和护色条件对鸭儿芹护色效果和质地的影响。研究结果表明,碱液漂烫和护色剂处理对鸭儿芹都有较好的护色效果。不同种类不同浓度的护色剂中,0.06%醋酸锌和0.3%植酸护色效果最为显著。鸭儿芹最佳漂烫工艺条件为90℃下1.0%Na2CO3溶液中下漂烫1min;最佳护色工艺条件为pH5的0.3%植酸+0.07%Zn(COOH)2溶液中浸泡20min。在此条件下漂烫和护色,鸭儿芹的色泽和质地最好。     

鸭儿芹干制品的加工工艺研究

研究了鸭儿芹干制品的加工工艺及其加工过程中的护色 技术。结果表明,用0.15％NaHCO3烫漂液于90℃条件下 水浴烫漂90s,鸭儿芹的护色效果最佳。鸭儿芹冻干制品 较其热风干制品有更好的色泽、天然香味和质地。从成本 和制品品质综合考虑,选择干燥初期55℃／h,中期75℃／ 1h,末期55℃／1.5h的热风干燥方式为最好。     

枸杞嫩茎叶护绿技术及质量控制研究

以新鲜的枸杞嫩茎叶为原料,采用L9(34)正交试验,研究不同种类护绿剂在不同漂烫条件下,对枸杞嫩茎叶护绿效果的影响及其过程中的质量控制,得出最佳护色技术。试验结果表明:用Zn2 (0.04%)、Na2SO3(0.02%)的护绿剂,在pH为6.5、95℃条件下漂烫1.5min,护绿效果最好且能较好地保持原有质地。     

盐渍黄瓜护绿方法的探讨

以叶绿素含量为评价指标,分别采用单因素和正交试验研究了盐渍黄瓜加工过程的漂烫、护色、盐渍等工艺条件对其护绿效果的影响.结果显示,黄瓜漂烫的适宜条件为90℃漂烫2 min;黄瓜盐渍的最佳条件为食盐浓度15%,盐渍液pH 6.0,盐渍时间3天;护色剂的适宜配方为Cu2+400 mg/L+Zn2+400 mg/L,按拟定的加工流程和此优化条件下制作的黄瓜样品具有较好的护绿效果.     

软包装芦笋的护绿方法研究

介绍了烫漂温度及其时间、护绿剂种类及其浓度等对绿芦笋护色效果的影响。结果表明,在95℃条件下烫漂2.0min,之后用200mg/kg的醋酸锌溶液浸泡4.0h,护色效果最好,且能较好地保持芦笋原有质地。     

茭白加工过程中的护绿研究

以新鲜茭白为原料,通过CuCl2、ZnCl2、CaCl2和柠檬酸的护绿单因素实验与联合护色的L9(34)正交实验,研究了不同种类的护绿液,在不同浓度条件下,采用烫漂、常温浸泡等护绿措施,对茭白叶护绿效果的影响.结果表明:用浓度为300mg/kg的CuCl2、ZnCl2、柠檬酸和浓度为250mg/kg的CaCl2复合护绿液,在100℃温度下烫漂90s,护绿效果最佳.     

速冻小松菜加工贮运中护绿技术研究

为探索出口速冻小松菜加工贮运中适宜的护绿保鲜措施,以莎莉品种小松菜为试材,研究其速冻前复合液烫漂处理中碳酸氢钠和氯化钠浓度、烫漂温度和时间等因素对小松菜冻藏贮运(-18℃)中色泽的影响;同时对处理条件进行优化。结果表明,小松菜速冻加工中适宜的护绿处理条件为:0.10%碳酸氢钠+0.10%氯化钠复合液,在90℃条件下漂烫1.2min,并结合0.20%氯化钙溶液室温浸泡30 min+PE包装+速冻等综合措施,对产品冻藏期色泽护绿效果较好。     

真空冷冻干燥绿芦笋护绿工艺研究

色泽是评价真空冷冻干燥绿芦笋质量的重要指标,本实验从漂烫和护绿剂浸泡处理两个环节对真空冷冻干燥绿芦笋的护绿工艺进行研究。运用U12(122×6)均匀实验研究不同漂烫条件对绿芦笋营养成分的影响,利用L16(45)正交实验研究不同护绿处理的护绿效果,最终得出真空冷冻干燥绿芦笋较优护绿工艺条件为:切分长度5～6cm,85～90℃条件下漂烫3.5～4min;0.3mol/L的Na2CO3溶液浸泡40s;护绿剂pH7.5、Zn(CH3COO)2浓度200mg/kg、CuSO4浓度50mg/kg,浸泡时间8h。     

苦菜的护色技术及质量控制研究

以鲜嫩苦菜为原料,研究了漂烫温度及其时间、冷浸时护色剂的种类及其用量对苦菜护色效果的影响及其过程中的质量控制,得出了最佳护色条件.结果表明,先用1.0%的碱液浸泡10min,然后在95%条件下漂烫2min,再用300mg/kg Cu(COOH)_2+200mg/kg ZnCl_2护色剂在pH8.0条件下浸泡4h,最后用1.0(%的CaCl_2溶液常温下浸泡30min,护色效果和质地最好,且能较好地控制重金属超标.     

蕨菜护绿工艺方法的研究

本试验采用不同用量的不同保绿剂,在不同漂烫温度和不同漂烫时间下,对蕨菜护绿情况进行比较分析。结果表明,将蕨菜用醋酸镁和亚硫酸钠,其浓度各为150ppm的混合护绿液,在95℃漂烫1.5——2.0分钟,护绿结果令人满意。     

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.