制取硫酸钾镁肥的相图分析及计算

以相图理论为依据，对青海某硫酸盐亚型盐湖日晒后的硫酸盐混盐和钾盐混盐加入适量芒硝，在15℃条件制取高品质的软钾镁矾即硫酸钾镁肥进行了相图分析和理论计算，给出了制取硫酸钾镁肥理想的配料比和加水量。     

东台吉乃尔湖晶间卤水兑卤制取高品位钾镁混盐研究

本文依据Ｎａ＾＋，Ｋ＾＋Ｍｇ＾２＋∥Ｃｌ＾－，ＳＯ＾２－４－Ｈ２Ｏ五元水盐体系相图理论，通过兑卤改变东台吉乃尔湖晶间卤水组成的原始状态点，利用自然蒸发使卤水中的钠、钾得到有效地分离，获得含钠仅１．３２％的高品位的钾镁混盐，为制取硫酸钾提供了优越的条件。     

东台吉乃尔湖晶间卤水兑卤制取高品位钾镁混盐研究

本文依据Ｎａ~＋，Ｋ~＋，Ｍｇ~（２＋）／／Ｃｌ~－，ＳＯ＿４~（２－）─Ｈ＿２Ｏ五元水盐体系相图理论，通过兑卤改变东台吉乃尔湖晶间卤水组成的原始状态点，利用自然蒸发使卤水中的钠、钾得到有效地分离，获得含钠仅１．３２％的高品位的钾镁混盐，为制取硫酸钾提供了优越的条件。     

钾镁混盐“反浮选-转化法”制取软钾镁矾的研究

软钾镁矾是生产硫酸钾的中间原料,也是一种优质无氯硫酸钾镁复合肥,实验以东台吉乃尔盐湖出产的钾镁混盐为原料,通过反浮选脱钠,加水转化的方法制取软钾镁矾,重点考察了浮选介质、药剂加入量、浮选转化温度等工艺条件,提出了一条“反浮选-转化法”制取软钾镁矾的工艺流程,具有较好的工业应用前景.     

利用硫酸盐型盐湖资源制取软钾镁矾的研究

在硫酸钾或钾镁肥生产过程中,软钾镁矾是其中很关键的中间原料.利用新疆某硫酸盐型盐湖卤水,通过室内多温动态蒸发试验,以卤水夏季矿-钾、硫混盐矿为原料,加水分解转化得到粗软钾镁矾混矿,最后,用反浮选脱钠技术精制该混盐矿,得到含NaCl为1.78%的高品位软钾镁矾矿混精矿,整个转化和浮选两阶段钾的总收率达64.75%.     

盐硝卤水制取硫酸钾新工艺的研究

本文通过相图分析，提出了一种盐硝卤水制取硫酸钾的新工艺，并通过大量试验数据，验证了该技术的合理性和可行性。     

盐硝卤水制取硫酸钾新工艺的研究

本文通过相图分析，提出了一种盐硝卤水制取硫酸钾的新工艺，阈过大量试验数据，验证了该技术的合理性和可行性。     

硝酸钾和芒硝制取硫酸钾的交互反应转化条件的研究

本文利用K .Na //No3-.SO42-.SO4^2-H2O 30度水盐体系相图，对硝酸钾与芒硝两段转化制取硫酸钾的工艺过程进行理论分析和计算，确定了最佳工艺流程。     

不纯净软钾镁矾与氯化钾转化制硫酸钾工艺条件的研究

本文介绍了利用电解质溶液理论计算不纯净软钾镁矾与氯化钾转化制取硫酸钾的工艺条件和相应的实验结果，提出了利用不纯净软钾镁矾制取高质量硫酸钾的工艺方法。     

多元体系相图工艺计算方法研究

本文提出了一个新的多元水盐体系相图的工艺计算方法 ,避免了常用的作图法在进行工艺计算时由于多次作图、读图所引起的误差 ,并通过硫酸钠镁复盐和氯化钾复分解生产硫酸钾相图及实验的研究验证了该相图工艺计算方法     

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