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Progress In The Chemistry Of Organic Natural Products Fortschritte Der Chemie Organischer Naturstoffe Progrès Dans La Chimie Des Substances Organiques Naturelles Book in PDF, ePub and Kindle version is available to download in english. Read online anytime anywhere directly from your device. Click on the download button below to get a free pdf file of Progress In The Chemistry Of Organic Natural Products Fortschritte Der Chemie Organischer Naturstoffe Progrès Dans La Chimie Des Substances Organiques Naturelles book. This book definitely worth reading, it is an incredibly well-written.
Author : Anonim
Publisher : Springer Science & Business Media
Page : 426 pages
File Size : 45,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709171790
Author : Anonim
Publisher : Springer Science & Business Media
Page : 279 pages
File Size : 46,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709165782
The volumes of this classic series, now referred to simply as "Zechmeister” after its founder, L. Zechmeister, have appeared under the Springer Imprint ever since the series’ inauguration in 1938. The volumes contain contributions on various topics related to the origin, distribution, chemistry, synthesis, biochemistry, function or use of various classes of naturally occurring substances ranging from small molecules to biopolymers. Each contribution is written by a recognized authority in his field and provides a comprehensive and up-to-date review of the topic in question. Addressed to biologists, technologists, and chemists alike, the series can be used by the expert as a source of information and literature citations and by the non-expert as a means of orientation in a rapidly developing discipline.
Author : Anonim
Publisher : Springer-Verlag
Page : 380 pages
File Size : 47,5 Mb
Release : 2013-03-07
Category : Science
ISBN : 9783709171455
Author : Anonim
Publisher : Springer Science & Business Media
Page : 469 pages
File Size : 55,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709180143
The properties of proteins are determined not only by the sequence of amino-acid residues in the polypeptide chains, but also by the con figuration of the chains-the way in which the chains are coiled or folded. It is probable that denaturation, the loss of some of the specific properties of a native protein, may in many cases be the result simply of a change in configuration of the polypeptide chains, without any change whatever in the sequence of amino-acid residues. During the past few years great progress has been made in the attack on the determination of the sequence of amino-acid residues in the poly peptide chains of proteins, through the work of SANGER and his collabora tors (Io9, IIO) and of other investigators. There has also been significant progress in the attack on the problem of the configuration of polypeptide chains, largely through the application of the X-ray diffraction technique.
Author : Anonim
Publisher : Springer Science & Business Media
Page : 429 pages
File Size : 49,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709171561
Author : Anonim
Publisher : Springer Science & Business Media
Page : 431 pages
File Size : 42,7 Mb
Release : 2013-04-17
Category : Science
ISBN : 9783709132654
Since the late 1950's when proton n. m. r. spectroscopy was first used in organic natural products studies the technique has increasingly con of this important area of chemistry. tributed to the rapid advancement Although the potential utility of 13C n. m. r. was recognized very early, essentially no application of 13C n. m. r. appeared in the literature prior to 1966 and 95% of the existing data are less than five years old. The initially slow growth had its cause in inadequate instrumentation, insufficient sensitivity being the main obstacle. This situation drastically changed with the advent and commercial availability of broadband ex citation and Fourier transform methods, giving natural-abundance 13C n. m. r. and its numerous chemical applications a tremendous impetus. Today BC spectra can be recorded on sample quantities down to the submilligram level, which until recently even withstood proton n. m. r. Paralleling the development of experimental techniques considerable progress has also been made on an understanding of spectral parameters, in particular their stereochemical implications on natural products. Although the large majority of data present up to now deals with known structures, an adequate basis now exists which allows the chemist to use the technique for tackling real problems on unknown molecules.
Author : Anonim
Publisher : Springer Science & Business Media
Page : 486 pages
File Size : 52,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709181430
During the past three decades the organic chemist has become in creasingly used to take advantage of more and more complex instrumenta tion and physical measurements in lieu of laborious, time-consuming and often ambiguous chemical transformations. Mass spectrometry is perhaps the most recent, most complex and most expensive addition to this field. In view of the astonishingly quick acceptance of nuclear magnetic reso nance by the organic chemist it is, in retrospect, surprising that he has neglected mass spectrometry for such a long time. This can be explained, in part, by the complexity of the instrumentation and some technical shortcomings of the earlier commercially available instruments but, to an even greater extent, it reflects also the prejudices against a technique that was originally mainly used for quantitative gas analysis. The usefulness of mass spectrometry as a qualitative technique in organic chemistry rather than a tool for quantitative analysis was more and more recognized towards the end of the last decade. A rather spectacular development followed during the intervening few years to the point that now any reasonably well equipped modern organic laboratory is supplied with, or at least has access to, one or more mass spectrometers suitable for work on organic compounds. Within the realm of organic chemistry the technique has become much more important, if not indispensable, for the natural products chemist while its application to synthetic problems is much less pro nounced.
Author : Anonim
Publisher : Springer Science & Business Media
Page : 235 pages
File Size : 55,5 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709180471
Author : Anonim
Publisher : Springer Science & Business Media
Page : 528 pages
File Size : 54,8 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709180525
Author : Anonim
Publisher : Springer Science & Business Media
Page : 547 pages
File Size : 41,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709171691
Author : Anonim
Publisher : Springer
Page : 418 pages
File Size : 54,6 Mb
Release : 2011-12-14
Category : Science
ISBN : 3709171806
Author : Anonim
Publisher : Springer Science & Business Media
Page : 561 pages
File Size : 48,7 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709171660
Substances belonging to this group of organic compounds are wi,lely distributed in Nature, being found in plants, both higher and lower fungi and, upto the present time, in one animal source, sheep wool-fat. For a long time no real differentiation was possible between the tetra- and penta cyclic triterpenes and the sterols. Then the two latter became disting uishable by their selenium. ·dehydrogenation products, i. e. , picene and naphthalene derivatives from the pentacyclic triterpenes and DIELS' hydrocarbon from the sterols. It is now apparent that those compounds yielding predominantly I: 2: 8-trimethylphenanthrene on dehydro genation represent yet another class, and this property is regarded as typical of the tetracyclic triterpenes. The group contains both C and C 30 3l compounds and, although the latter fall outside RUZICKA'S strict definition of triterpenes (I42), it seems desirable to permit this deviation. Members with thirty-two carbon atoms may well be discovered in due course. In a most· valuable account of the triterpenes written in I949, JEGER. (II3) was able to summarize all that was known about the tetra cyclic group in a very small compass. Most of the work discussed in the present article has been published during the last five years and in that time the structures of some twenty compounds have been elucidated. Of outstanding importance is the revelation of close structural relation ships tQ the steroids, and the presence of C and C side-chains, skeletally 8 9 identical with those of cholesterol and ergosterol.
Author : Anonim
Publisher : Springer Science & Business Media
Page : 541 pages
File Size : 51,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9783709180037
Author : 3Island Press
Publisher : Unknown
Page : 368 pages
File Size : 40,8 Mb
Release : 1967-10-30
Category : Electronic
ISBN : 3709181658
Author : Anonim
Publisher : Springer-Verlag
Page : 639 pages
File Size : 55,6 Mb
Release : 2013-03-07
Category : Science
ISBN : 9783709180327
