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ards because the country operates in a decentralized manner that allows municipal and provincial officials to interpret beijing s directives in their own way china s state environmental protection agency reports on its website that its outspoken deputy director pan yue is urging a change in chinese laws to correct this situation arguing that government officials are involved in the most severe cases of environmental violations he is calling for new rules that would permit the central government to punish officials who fail to enforce national standards chemical engineering news issn 0009 2347 copyright 2007 american chemical society publicat de omidiu la 10 47 trimiteți prin e mail postați pe blog trimiteți pe x distribuiți pe facebook trimiteți către pinterest etichete environmental policy firma de contabilitate foraje green chemistry sustainability traduceri engleza traduceri franceza new review microwave assisted synthesis in water as solvent for those interested in microwave assisted synthesis in water a new review has been published by oliver kappe and doris dallinger of www organic chemistry org fame chem reviews doi 10 1021 cr0509410 microwave assisted synthesis in water as solvent doris dallinger and c oliver kappe christian doppler laboratory for microwave chemistry cdlmc and institute of chemistry karl franzens university graz heinrichstrasse 28 a 8010 graz austria contents 1 introduction 2 organic synthesis in water 3 microwave assisted organic synthesis 4 microwave chemistry in water general aspects 5 transition metal catalyzed reactions 5 1 suzuki reactions 5 2 heck reactions 5 3 sonogashira reactions 5 4 stille reactions 5 5 hiyama reactions 5 6 carbonylation reactions 5 7 cyanation reactions 6 other transition metal mediated reactions 7 n o s functionalizations 7 1 n acylations 7 2 n alkylations 7 3 n arylations 7 4 o and s functionalizations 8 heterocycle synthesis 8 1 five membered n heterocycles 8 2 six membered o heterocycles 8 3 six membered n heterocycles 8 4 six membered n s heterocycles 9 mannich type multicomponent reactions 10 nucleophilic substitutions 10 1 nucleophilic aromatic substitutions 11 epoxide ring opening reactions 12 diels alder cycloadditions 13 decarboxylations and hydrolyses 14 protection deprotection reactions 15 miscellaneous reactions 16 reactions in near critical water 17 future prospects and challenges 18 acknowledgments 19 references full text in html full text in pdf it should be interesting to note if anything new is in this review and to see what they see as future developments in the area publicat de omidiu la 10 46 trimiteți prin e mail postați pe blog trimiteți pe x distribuiți pe facebook trimiteți către pinterest etichete clean technologies contabilitate ecology foraje puturi green chemistry traduceri autorizate traduceri legalizate the bioeconomy a new blog on the horizon simon robinson of icis today reported a new blog written by gerry mckiernan self described as science and technology librarian iowa state university library gerrymck iastate edu the bioeconomy blog is the title of the new site this coupled with the fact that gerry is a member of iowa state and the role he has as librarian means that this site will certainly be worth watching for output the inaugural post of the blog was as follows launch of the bioeconomy blog the bioeconomy blog is a devoted to the identification and promotion of key primary and secondary literature relating to biorenewable fuels most notably bioethanol and biodiesel it will seek to identify all significant literature and presentations relating to the economic environmental political and social aspects of biofuel initiatives with proper support it is hoped that the major publications and presentations cited in the bioenergy blog will be compiled at some point into a web based annotated bibliography the bioeconomy blog was formally established on may 6 2007 understanding how work life can mean that blog output can be sporadic i apologise for my own absence recently i certainly will keep a keen eye on this blog since it closely matches some off my already described interests here gerry s experience with various literature types should prove very insightful publicat de omidiu la 10 44 trimiteți prin e mail postați pe blog trimiteți pe x distribuiți pe facebook trimiteți către pinterest etichete alternative energy climate change environmental policy foraje puturi apa green chemistry renewable resources sustainability tarduceri legalizate traduceri autorizate apologies for neglecting blog with promise for new posts coming soon just a quick note to say that the infrequent posting recently is the result of my taking up a new employment role consulting as an organic chemist in the biofuels area here in the uk it s an exciting time with lots of information and experiences being gained i shall endeavour to begin posting new pieces of information in the next few days thanks for having patience in the meantime to anyone who still keeps an eye on this technical blog mark publicat de omidiu la 10 43 trimiteți prin e mail postați pe blog trimiteți pe x distribuiți pe facebook trimiteți către pinterest etichete apologies firma de contabilitate foraje puturi apa mark traduceri probing green chemical analytical methodologies a new review of the area the acs journal chemical reviews appears to be having an edition focusing on green chemistry related articles in the near future by inspecting the asap article list for the journal this is excellent news although it must be emphasised that due to the scope of the subject it would take an entire journal of which the rsc has one and much more coverage dedicated to this multifaceted discipline and its daily development assuming the list is comprehensive for the subject as some chemists i ve spoken to over the blogosphere seem to feel would be inaccurate green chemistry is most certainly not about just doing reactions in water it is from mere reflection about looking at the bigger picture thinking strategically in terms of chemistry engineering and understanding and using the associated drivers for industry within the real world economics and sociology one article covered by chemical reviews is the following looking more specifically at analytical chemistry in relation to green chemistry s agenda see green analytical methodologies below here people can see clean technology development for the laboratory environment which in report form is rather unusual and therefore of interest here this by definition has implications for other areas within the laboratory setting and converges with other schemes which i shall discuss further below the author list for this article includes dr jennifer l young whom is senior program manager at the acs green chemistry institute usa she also manages and is a contributing force for the green chemistry resource exchange itself a potentially amazing tool with ramifications in knowledge transfer ktp intellectual property ipr and informatics and for education of the public and various industries in general the goal of the exchange is stated as our mission is to provide the public with a straightforward collection of media dealing with green chemistry and innovative technology as well as the means to share new ideas and research a further post will deal with this exchange in due course chem rev doi 10 1021 cr068359e green analytical methodologies lawrence h keith liz u gron and jennifer l young environmental chemical safety educational institute 329 claiborne way monroe georgia 30655 hendrix college 1600 washington avenue conway arkansas 72032 and acs green chemistry institute 1155 16 th street nw washington dc 20036 contents 1 introduction 1 1 green chemistry 1 2 green analytical chemistry 2 trends in green analytical chemistry 2 1 greening pretreatment 2 1 1 solvent reduction and replacement 2 1 2 solvent elimination 2 1 3 derivatization of molecules and surfaces 2 2 greening signal acquisition 2 2 1 spectroscopy 2 2 2 electrochemistry 2 2 3 bioanalytical chemistry 2 3 greening with automation and flow techniques 2 3 1 flow injection analysis fia and sequential flow injection analysis sia 2 3 2 multicommutation 2 4 green by in situ 3 nemi and greener analytical methods 3 1 background of nemi 3 2 greenness profiles of greener analytical methods 3 3 application of greenness profiles 3 4 characteristics of greener analytical methods in nemi 4 conclusion 5 acknowledgments 6 references full text in html full text in pdf copyright 2007 american chemical society the introduction for over 10 years the green chemistry movement has been promoting ways to reduce the risks of chemical use to humans and the environment an important goal is to develop increasingly environmentally benign chemistries a relatively underexamined area of green chemistry is analytical chemistry however analytical methods are not easily identified as being environmentally benign assessment requires careful examination of often complex analytical methodologies within the context of green chemistry this article attempts to examine qualitatively the scope of green analytical chemistry with a survey of the recent analytical literature to discern common green analytical chemistry themes while creating and applying a more quantitative approach to existing environmental methodologies the authors set forth some basic characteristics or acceptance criteria to which analytical methods should conform in order to be called green the application of these criteria applied to over 800 methods in the national environmental methods index nemi the largest available database of environmental analytical methods is discussed herein i feel this is entirely correct during the past 8 years i have rarely seen articles within the green chemistry arena which have dealt with or suggest mechanisms to link these two areas of chemistry although the references list is extensive these merely take snapshot views of particular cases rather than the broader strategic view of the area it is indeed true the area is relatively unexplored moreover for efforts to begin to standardise the greenness of the analysis as opposed to to the ad hoc methods currently used is rarer still this could be the first such attempt or estimation of what would be involved although perhaps the authors of the article young et al would be able to provide more information at a later date in subsequent articles this is very topical for me at the moment my recent take up of a role within the biofuels arena has directly led me to apply analytical chemistry to monitor specifications in the commercial environment quality control assurance and process monitoring process optimisation this relates to real time monitoring of chemical reaction industrial processes and is a fundamental ideal of green chemistry the case is that in the commercial situation these are often the applying of standard equipment and analytical packages that other organisations generate specifically for that application example gas chromatography perkin elmer or varian applied to product streams for example en 14214 relating to biodiesel which i have been working with recently smaller enterprises don t have the time to generate there own systems until much later after start up and then to put them in place they are often reliant on the companies providing analytical packages same examples perkin elmer or varian to provide the environmentally conscious solutions for them and to do so cost effectively moreover in the era where energy effectiveness is also critical such considerations should also include comprehensive energy minimisation as a requirement it should be noted that this entire green analytical methodologies area also relates closely to the ideals of good laboratory practice glp alternative reference in my opinion there is potential that glp could be one driver for gam uptake within the laboratory this would be via the traditional routes where the european committee for standardization cen and american society for testing and materials astm as well as international standards organisations such as iso could generate the environmentally conscious testing regimes where the analytical apparatus providers could then utilise their expertise to rapidly improve the area there are numerous other layers of organisations that could act here although are not specifically mentioned such as the us epa and the european and international equivalents whom also provide vital functions in the area including establishment of databases for ease of use the input of standards here is crucial since the debate is often had particularly with those not familiar with gc is what is green is it not just another buzz word i m frequently involved in debate going either way as to if a technique or process is actually green or not and have to regularly explain how professionals measure if it is or is not it s the process of proving the green tag and therefore the degree of economic environmental social acceptability that many people are not familiar with or are cynical about for me adopting a similar approach to that used in intellectual property and the state of the art and having improvements over the art go far in justifying the tag green this is the rule of thumb that should probably be encouraged as it s one the public would most understand in my personal view the greenness profiles of greener analytical methods section goes some way to debate and approach quantifiable methods to quantify the issue in a manner similar to the approaches used in analysis of process chemistry and application in the most basic sense the green chemistry metrics further debate and their wider roll out to industry is ongoing in summary this area will continue to grow since this uses the basic principle of establishing of doing more with less but doing so such that the materials and apparatus are having the minimal impact in the wider sense the area is still in its infancy relative to other areas of green chemistry but will become much more important as methods of monitoring impacts move outward to society at large one only has to see the potential for smart metering relating to the polluter pays principle to see that such packages could have commercial success since in order to be green identification of the issues is necessary in the first place causing industries and societies greater reliance on advanced analytical chemistry green analytical methodologies will have significant impacts on their development and will be a further driver towards green chemistry and scientific technological development in general publicat de omidiu la 10 43 trimiteți prin e mail postați pe blog trimiteți pe x distribuiți pe facebook trimiteți către pinterest etichete analytical firma de contabilitate foraje puturi green polluter tarduceri legalizate traduceri autorizate postări mai vechi pagina de pornire abonați vă la postări atom site uri spectaculoase traduceri lega...