云南盐矿资源开发利用条件分析

本文依据云南省原盐市场供需趋势，资源状况，经济地理区位，对滇西、滇南和滇中三个含盐区的岩盐矿产资源开发利用条件进行分析，提出对策建议，旨在宏观调控全省制盐工业布局，保护资源．避免盲目开发，供决策者参考。     

依靠科技进步 提高盐矿回采率

一、自贡地区岩盐矿产资源概述 自贡地区共有大坟堡、大山铺、郭家坳三个小岩盐体及威西岩盐体。 大山铺、大坟堡、郭家坳岩盐体,分布在自流井背斜南翼,产于嘉陵江组四段四层中,呈透镜状产出。具有盐层薄、晶位高、储量少、面积小等特点,已被充分开发利用。 威西岩盐体,地跨荣县、井研、犍为等县,     

水平对接盐井提高矿产资源综合利用率技术研究

目前国内盐矿利用水平对接井开发利用矿产资源的综合利用率尚有较大的提升空间,在溶盐机理、建井技术及生产管理等环节存在一定的提升空间,为此,本文通过分析岩盐溶解机理及当前盐井生产现状,提出缩减布井井距,加强生产控制等建议,从而对利用水平井提高矿产资源综合利用率及盐井造腔技术的开发利用提供一定的指导作用。     

矿山开采的地质条件分析——以辽宁省阜新市新邱区振兴煤矿为例

文章主要分析了振兴煤矿的基本地质条件,包括地层、构造、岩浆岩及开采技术条件等,基本查明了矿区构造特征和煤层赋存情况,为矿产资源储量评估和合理开发利用提供可靠依据。     

对四川自贡大坟堡岩盐矿床开采回收率实现高指标有关问题的认识

矿产资源是开创新局面,进行社会主义现代化建设的重要物质基础。从某种意义上来说,在主客观条件许可的情况下,尽可能提高矿产资源的回收率,降低损失率,这是矿山开采企业获得更高经济效益的必要前提和途径。同时也是考查企业对矿产资源合理开发,充分利用的指标之一。据国外资料:房柱法旱采岩盐采收率为40     

盐井井管穿漏与防治问题

利用对井水溶水力压裂法开采岩盐的采矿工艺,在我国许多岩盐矿区被采用。其特点是建槽周期短、见效快、效益高。但在开采后期,普遍存在着井管的损坏,致使井组报废或封停的现象。井组所控制的岩盐储量达不到开采要求,造成了矿产资源的浪费。     

浅议合理开发利用平顶山岩盐资源

文章以科学发展观为指导,就平顶山岩盐资源开发利用的现状及存在问题进行分析研究,提出了合理开发节约利用平顶山岩盐资源的举措和建议。     

自流井构造大山铺岩盐体开发研究

大山铺岩盐体的开发利用,促进了盐业的发展。在郭家垇岩盐体和大坟堡岩盐体产量下降,威西岩盐体尚未开发之时,起到了增卤保盐产的积极作用。特别是在自贡各盐厂真空制盐增产,邓关盐厂也使用长山盐矿卤水制盐,长山盐矿卤水供应紧张的条件下,为缓解卤水供应紧张状况和平衡全市盐业生产起到了不可低估的作用。该盐体对大安盐厂十多年来的产量、成本、税利及各项主要经济指标的完成和超额完成起了重要作用。因此,研究大山铺岩盐体的开发状况,探讨开发规律,对稳产高产、提高采收率具有十分重要的现实意义。     

罗城矿区钻井提速技术及其应用效果

四川罗城矿区工程地质条件较复杂,钻井周期较长,钻井速度低、成本高,单只钻头行程短,严重制约了该区岩盐资源的开发利用。该区2017年以前已完钻井钻井周期大都超过80天。2017年钻施钻的罗68井和罗69井是该区块钻井最顺利的井,全井基本无杂事故,钻井周期也缩短至45天以下。本文根据罗68井和罗69井实钻过程中取得的经验,总结了罗城矿区钻井提速技术,为该区岩盐资源开发利用提供了有利的支撑。     

谢碾岩盐矿区水溶压裂法采盐试验的初步总结

本文介绍了淮阴市谢碾岩盐矿区开发利用初期，采用水溶压裂法进行采盐试验的情况。对压裂效果进行了初步分析，并提出了本矿区今后工作的建议。     

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