铝的弊端

铝在人们的饮食世界里,历史悠久,获得了最广泛的应用。在日常生活中,用铝制品炊具蒸煮饭食、烧菜;用铝壶烧水;用含铝食品添加剂制作食品,如用明矾(即硫酸钾铝)和面炸油条、油饼,用硫酸铝烘焙制糕点、饼干与面包,用明矾澄清饮水等等,似乎人们离不     

西瓜的妙用

中医认为,西瓜有止渴、解毒、消炎、利尿、润肺、健肾等功效。既能防病,又能治病,是理想的天然营养保健佳品。其治病验方有: 暑期心烦口渴、尿赤,用西瓜外皮、绿豆各50g,煎水服。 高血压患者用西瓜皮15g、草决明10g,前水代茶饮。 糖尿病、尿浊和口渴,用西瓜皮60g、冬瓜皮30g、花粉20g,水煎服用。 肾炎水肿患者,用西瓜、赤水豆、茅根各50g,煎水服。 醉酒,用西瓜汁水300ml～500ml,加适量白     

用玉米粉或高粱作辅料酿制的非洲啤酒的营养成份

分别用高粱或玉米作淀粉辅料做高粱啤酒小试,比较啤酒的营养成份,发现用高粱作辅料的啤酒其乙醇、维生素 B_1、氮苯酸、灰分、肌醇六磷酸盐、锌、铜、铁、镁、钾、磷的含量明显高于用玉米作辅料的啤酒。因此用高粱作辅料的啤酒比用玉米作辅料的啤酒更能满足啤酒饮用者的营养要求。因而得出结论,从经济和饮食角度来说,应鼓励用高梁作辅料酿制高粱啤酒。     

卷烟商标纸烟用薄膜的摩擦系数对包装质量的影响

本文以卷烟商标纸和烟用薄膜为研究对象,采用TMI32-06-00摩擦系数测定仪测定了烟用薄膜与烟用薄膜、烟用薄膜与金属面之间摩擦系数,小盒商标与烟用薄膜、小盒商标与金属面之间摩擦系数,条盒商标与烟用薄膜、条盒商标与金属面之间摩擦系数,并考察各摩擦系数对包装质量的影响。     

打包用绳的选择

纺织、印染行业产成品(棉纱、棉布)打包,长期以来,绞纱包普遍用镀锌铁丝加竹片捆扎,筒子纱包用麻绳捆扎,棉布包亦普遍用麻绳捆扎。捆扎用麻绳或镀锌铁丝,成本较高。在棉纱包装材料费用中,捆扎用绳占百分之三十,在棉布包装材料费用中,捆扎用绳占     

家纺设计中针织组织结构的设计与选择

探讨在家纺产品设计中正确设计、选择针织组织结构的方法。介绍不同家纺产品的组织结构设计要点,包括窗帘帷幕用针织品、幕用针织品、包覆用针织品、床上用针织品、蚊帐类针织品、棉毯与毛毯、针织地毯、贴墙用针织品,提出应根据各种家纺用途对针织组织结构进行合理设计、选择与搭配。     

板刷的妙用

自从有了洗衣机之后,洗衣用的板刷被废置一旁。其实,洗衣用的尼龙板刷大有妙用。 (一)用尼龙板刷刷洗各种蛋类,既快又干净:特别是鸭蛋多粘有鸭屎,用手洗很难洗净,丢在米锅里蒸极不卫生。鸡蛋、鹅蛋、鹌鹑蛋的壳膜上,在运输和储存中     

酿造用稻壳的研究现状及发展趋势

文章主要介绍酿酒用稻壳的基本特性、稻壳与酿酒的关系、酿酒用稻壳的回收再利用等研究现状,并提出从全面分析酿酒用稻壳的物理特性、筛选最适酿酒用稻壳的新品种、创新酿酒用稻壳的预处理方式3个方面开展深入研究,进一步提高酒质。为今后的相关研究提供一些新思路,以促进酿酒产业朝着生态酿酒的方向发展。     

常见的机用丝锥磨损原因及预防措施分析

造成常见机用丝锥磨损的原因有早期的磨损也有后期的磨损。目前,常见的机用丝锥磨损的原因大致有磨削烧伤、表面层出现脱碳、碳化物过度堆聚、机用丝锥的硬度较低、机用丝锥的前角大小不适等。在针对性的将影响机用丝锥出现磨损的原因进行分析,采取科学的预防措施就能够保证机用丝锥的使用寿命。文章就对常见的机用丝锥磨损的原因进行分析,并提出预防的措施。     

纸的导电处理

纸是作为记录用的材料开始使用的,然而,到了近代,出现报纸、杂志、书籍等印刷品后,纸便作为各种印刷用、书写用、图画用、其他情报事业用的材料;此外,还有瓦楞纸板等用于包装工业,电力电缆纸、电容器纸用于电气工业,压合纸板等用于建筑工业,因此,纸对各行各业都是必不可少的     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

An internet compendium of analytical methods and spectroscopic information for monomers and additives used in food packaging plastics

An internet website (http://cpf.jrc.it/smt/) has been produced as a means of dissemination of methods of analysis and supporting spectroscopic information on monomers and additives used for food contact materials (principally packaging). The site which is aimed primarily at assisting food control laboratories in the European Union contains analytical information on monomers, starting substances and additives used in the manufacture of plastics materials. A searchable index is provided giving PM and CAS numbers for each of 255 substances. For each substance a data sheet gives regulatory information, chemical structures, physico-chemical information and background information on the use of the substance in particular plastics, and the food packaging applications. For monomers and starting substances (155 compounds) the infra-red and mass spectra are provided, and for additives (100 compounds); additionally proton NMR are available for about 50% of the entries. Where analytical methods have been developed for determining these substances as residual amounts in plastics or as trace amounts in food simulants these methods are also on the website. All information is provided in portable document file (PDF) format which means that high quality copies can be readily printed, using freely available Adobe Acrobat Reader software. The website will in future be maintained and up-dated by the European Commission's Joint Research Centre (JRC) as new substances are authorized for use by the European Commission (DG-ENTR formerly DGIII). Where analytical laboratories (food control or other) require reference substances these can be obtained free-ofcharge from a reference collection housed at the JRC and maintained in conjunction with this website compendium.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

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

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

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     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press