调味粉混合质量的量化评价

利用数理统计原理,找出调味粉混合效果的量化分析方法,把相对误差、混合度、混合指数等指标作为测量调味粉混合结果、混合程度的依据,以此进行调味粉混合质量的评价.为保证调味粉良好的混合质量,混合过程中要管理好混合时间、加料顺序、液体原料、混合设备、原料质量等的关键质量控制点.     

调味粉混合质量的量化评价

利用数理统计原理,找出调味粉混合效果的量化分析方法,把相对误差、混合度、混合指数等指标作为测量调味粉混合结果、混合程度的依据,以此进行调味粉混合质量的评价.为保证调味粉良好的混合质量,混合过程中要管理好混合时间、加料顺序、液体原料、混合设备、原料质量等的关键质量控制点.     

蔬菜调味粉的发展前景

调味粉可以丰富食物的味道,蔬菜的药用价值及保健价值（如大蒜有抗高血脂、抗血小板凝集等作用,洋葱健胃,韭菜可除胃热等）使调味粉的选料更加强调功能性。在咖喱、姜、洋葱、丁香、薄荷、肉桂、胡椒这些可作为调味粉的原料中,丁香对脂质氧化及亚油酸的脂肪氧化酶抑制作用最大。栾金水也是利用蜂胶、香菇、芦笋粉中含有丰富的降脂功能成分,在桂皮、丁香、洋葱、月桂、香芹芫荽、芥末、咖喱等调味粉中加入蜂胶、香菇、     

卤料调味粉喷雾干燥工艺研究

为了研究卤料调味粉的喷雾干燥工艺,改善传统酱卤工艺。实验以新鲜卤水为原料,采用单因素及正交实验研究了辅料的选择、辅料的添加量、入料浓度、入料流量、进风口温度等影响因素。经过正交实验优化最终确定卤料调味粉的喷雾干燥工艺:辅料麦芽糊精添加量为25g/dL,入料流量为10mL/min,入料浓度为30%,进风口温度为170℃。在该条件下喷雾干燥卤料调味粉得率较高,通过调味粉加工的酱卤制品感官品质较好。     

出口调味粉中大肠菌群的检测及其污染分析

通过对某注册出口食品企业进行为期8个月的出口调味粉样品进行大肠菌群检测,样品包含6个品种共计301份,结果共检测到大肠菌群超过限量值150 MPN/100 g共有15份:SA调味粉131份,超过限量值有6份,占该品种4.6%;SB调味粉133份,超过限量值有3份,占该品种2.3%;SC调味粉8份,超过限量值有2份,占该品种25%;SD调味粉14份,超过限量值有2份,占该品种14.3%;SE调味粉6份,超过限量值有1份,占该品种16.7%;SF调味粉9份,超过限量值有1份,占该品种11.1%.然后分析了它们被污染的可能原因,从而找出相应控制措施,为出口企业提高产品品质、生产优质复合调味粉提供参考依据,从而确保出口调味粉的质量安全.     

意大利马铃薯膨化原坯

在各类食品原料中,马铃薯最适合制作休闲食品。伟嘉有限公司代理的意大利马铃薯系列半成品是该类产品中历史悠久、全球销量大、市场覆盖面广的产品。在意大利,该品于严格的质量和工艺控制下制成品的档次和质量有可靠的保证。意大利马铃薯膨化原坯造型多样(近30种)、口味繁多(近百种调味粉)、加工工艺简单(仅需油炸、滚料、包装等工序)、质量易于控制(油温和时     

南极磷虾调味粉的研制及其感官评价

以冷冻南极磷虾为原料,结合传统调味粉的加工方法,采用复合蛋白酶、风味蛋白酶进行二段酶解,经过脱氟、美拉德反应、喷雾干燥、复配调味等一系列操作,制得具有浓郁虾味的调味粉。结果表明:最佳酶解工艺参数为复合蛋白酶添加量0.5%,酶解时间2h,风味蛋白酶添加量0.4%,酶解时间3h,固形物含量达到16%。最佳配料为盐、糖、味精、I+G的添加量分别占总量的28%,5%,18%,0.9%,在该条件下制备的南极磷虾调味粉呈浅黄褐色,虾味浓郁,咸度适中,适口性好。     

香辛调味料的分类,鉴定和贮藏

概述 香辛调味粉是以天然植物香料为原料加工而成的。它具有特殊的香气,辛辣苦麻等味道,它能改善食品的不良气味,增加食品的鲜美风味,从而增进食欲。许多调味料还具有一定的营养价值和抑制细菌生长的功效,而且也是天然抗氧剂。我国香辛调味料的生产源远流长,与日常生活结下了不解之缘。由于使用方便,深受广大家庭主妇的青睐。近几年调味粉发展很快,品种日益增多,已成为千家万户烹饪的常备佐料。     

响应面法优化麻辣豆腐皮生产工艺的研究

以大豆为原料,采用响应面分析法研究了麻辣豆腐皮的生产工艺。首先,通过单因素试验研究了生产工艺中的破脑粒径大小、点浆温度、卤水用量、调味粉的添加量对麻辣豆腐皮质量的影响;根据Design-Expert中心优化组合试验设计原理,采用响应面分析法,得到的最佳生产工艺条件为:破脑粒径大小1.5~2.0 cm,点浆温度85℃,卤水用量4%,调味粉(由辣椒粉和花椒粉以2︰1的比例配制)的添加量2%。此条件下,麻辣豆腐皮产品组织状态均匀一致,硬中带韧,色泽鲜亮,口味适中。     

降脂调味粉制作工艺及功能性研究

以蜂胶、香菇、芦笋为主要原料 ,辅以香辛料等制成的降脂调味粉不但能增强食物风味 ,而且有显著降低血脂 (CT、TG)和低密度脂蛋白 (LDL—C)的功效 (P <0 0 5— 0 0 1 ) ,是一种新型天然保健调味品。     

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.     

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.     

低温带皮菜籽粕微粉的不同粒级部分的功能特性

为研究低温带皮菜籽粕微粉的不同粒级部分的功能特性,以经低温脱脂的带皮菜籽粕为原料,经微粉碎后筛分成212~425μm、150~212μm和106~150μm的3个不同粒级的微粉样品,检测这些样品的吸水性、吸油性、乳化性和乳化稳定性、蛋白质体外消化率。结果表明:1 3个不同粒级的微粉样品之间的粗纤维含量存在显著差异,表明三者的结构组成成分有一定差异。23个微粉样品的乳化活性和乳化稳定性随粒度级别的减小而显著增加(P0.01)。33个微粉样品的蛋白质体外消化率随粒度级别的减小而显著增加(P0.01)。4不同粒级带皮菜籽粕微粉样品的吸水性与吸油性受其结构组成物质不同和粒度的双重影响,与粒度的相关性不明显。     

Microbiology of food taints

Fresh and processed foods are often spoilt by the presence of undesirable flavours and odours caused by microbial action. The aim of this paper is to review the current knowledge of microbiologically induced taints that occur in a wide range of foodstuffs, including meats, poultry, fish, crustaceans, milk, dairy products, fruits, vegetables, cereals and cereal products. Examples have been chosen where the compounds responsible for the taint have been identified and sufficient data obtained to demonstrate the involvement of microorganisms. However, in some cases the full identity of the causative organism may not have been elucidated. The types of microorganisms covered by this review include bacteria, fungi, yeasts, actinomycetes and cyanobacteria. Although cyanobacteria do not in general infect foods, their presence in aqueous systems and water supplies can lead to off-flavours in aquatic organisms and processed foodstuffs. Several examples of each of these processes are discussed. Wherever possible, the likely biosynthetic pathway used by the microorganism to produce the offending compound in a foodstuff is indicated.     

Analysis for organic residues from aids to polymerization used to make plastics intended for food contact

Polymers intended for food contact use have been analysed for organic residues which could be attributed to a range of substances employed as polymerization aids (e.g. initiators and catalysts). A wide range of polymers was extracted with solvents and the extracts analysed by gas chromatography-mass spectrometry (GC-MS). The overwhelming majority of substances identified were not derived from aids to polymerization but were oligomers, additives and adventitious contaminants. However, a small number of substances were identified as initiator residues. These included tetramethylsuccinonitrile (TMSN) which was observed in two polymers and it derived from recombination of two azobisisobutyronitrile (AIBN) initiator radicals. Methyl benzoate, benzoic acid, biphenyl and phenyl benzoate were detected in one poly(methyl methacrylate) sample and in two polyvinylchlorides and they are thought to be derived from benzoyl peroxide initiator. TMSN was subsequently targeted for analysis of poly-(methyl methacrylate) plastics using proton nuclear magnetic resonance spectrometry (¹     

Tests of potential functional barriers for laminated multilayer food packages. Part II: Medium molecular weight permeants

Experiments were performed to characterize the kinetics of the permeation of different medium molecular weight model permeants: bisphenol A, warfarin and anthracene, from liquid paraffin, through a surrogate potential functional barrier (25 microns-thick orientated polypropylene--OPP) into the food simulants olive oil and 3% (w/v) acetic acid. The characterization of permeation kinetics generally observed the permeation models previously reported to explain the experimental permeation results obtained for a low molecular weight group of model permeants. In general, the model permeants exhibited behaviour consistent with their relative molecular weights with respect to (a) the time taken to attain steady-state permeation into the food simulant in which they were more soluble, (b) their subsequent steady-state permeation rates, and (c) their partition between liquid paraffin and the OPP membrane.     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. I: Interlaboratory studies of methods of analysis

This paper describes the first part of a project undertaken to develop mussel reference materials for Paralytic Shellfish Poisoning (PSP) toxins. Two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin (STX) and decarbamoyl-saxitoxin (dc-STX) in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the second part of the project: the certification exercise. In the first study, 18 laboratories were asked to measure STX and dc-STX in rehydrated lyophilized mussel material and to identify as many other PSP toxins as possible with a method of their choice. In the second interlaboratory study, 15 laboratories were additionally asked to determine quantitatively STX and dc-STX in rehydrated lyophilized mussel and in a saxitoxin-enriched mussel material. The first study revealed that three out of four postcolumn derivatization methods and one pre-column derivatization method sufficed in principle to determine STX and dc-STX. Most participants (13 of 18) obtained acceptable calibration curves and recoveries. Saxitoxin was hardly detected in the rehydrated lyophilized mussels and results obtained for dc-STX yielded a CV of 58% at a mass fraction of 1.86 mg/kg. Most participants (14 out of 18) identified gonyautoxin-5 (GTX-5) in a hydrolysed extract provided. The first study led to provisional criteria for linearity, recovery and separation. The second study revealed that 6 out of 15 laboratories were able to meet these criteria. Results obtained for dc-STX yielded a CV of 19% at a mass fraction of 3.49mg/kg. Results obtained for STX in the saxitoxin-enriched material yielded a CV of 19% at a mass fraction of 0.34mg/kg. Saxitoxin could not be detected in the PSP-positive material. Hydrolysis was useful to confirm the identity of GTX5 and provided indicative information about C1 and C2 toxins in the PSP-positive material. The methods used in the second interlaboratory study showed sufficiently consistent analysis results to undertake a certification exercise to assign certified values for STX and dc-STX in lyophilized mussel.     

The Ministry of Environmental Protection Issued "Feasible Technology Guidelines for Pollution Prevention and Control in Wood Pulping Process of the Paper Industry (Trial)" and Two Other Guiding Technical Documents

On December 27t＂, 2013, the Ministry of Environmenta Protection announced that, in order to implement ＂The Environmental Protection Law of the People＇ s Republic of China＂, improve the working system in environmenta protection technologies, and promote technologica advancement in pollution prevention, the Ministry of Environmental Protection sponsored the formulation of three guiding technical documents including ＂Feasible Technology Guidelines for Pollution Prevention and Contro n Wood Pulping Process of the Paper Industry （Trial）＂     

1~(st) Intelli-Tissue~ EcoEc Tissue Machine Supplied by PMP Group Successfully Put into Operation in China

正On April 29th,2014,Intelli-Tissue EcoEc tissue machine supplied by PMP Group successfully put into operation at Hebei Xuesong Paper Co.,Ltd.,this is the first such kind of paper machine of PMP Group in China.