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Author : K. Paech (ed)
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (785 download)
Download or read book Modern Methods of Plant Analysis. Vol. 1 (Moderne Methoden Der Pflanzenanalyse) written by K. Paech (ed) and published by . This book was released on 1955 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. Paech
Publisher : Springer Science & Business Media
ISBN 13 : 3642649556
Total Pages : 639 pages
Book Rating : 4.6/5 (426 download)
Download or read book Modern Methods of Plant Analysis / Moderne Methoden der Pflanzenanalyse written by K. Paech and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. Biemann
Publisher : Springer Science & Business Media
ISBN 13 : 3642459935
Total Pages : 563 pages
Book Rating : 4.6/5 (424 download)
Download or read book Modern Methods of Plant Analysis / Moderne Methoden der Pflanzenanalyse written by K. Biemann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 563 pages. Available in PDF, EPUB and Kindle. Book excerpt: 123 phase and hence have no direct bearing on the retention time of solutes. However in gas-solid chromatography, a considerable quantity of the mobile phase may be adsorbed on the surface of the stationary adsorbent which diminishes the column's effective length and ability to retain solutes. In this respect helium has been found to be preferable to most other gases (GREENE and Roy, 1957) because it is adsorbed to the least extent. 3. Packed columns offer a considerable resistance to flow, which may create a pressure differential between inlet and outlet of sufficient magnitude to cause an unfavorable flow rate through a significant length of the column. A reduced inlet/outlet pressure ratio can be obtained by using light molecular weight gases toward which the column packing shows the greatest permeability. The flow rate of the mobile phase is normally adjusted by altering the column inlet pressure, for which purpose commercial pressure regulators of sufficient accuracy are available. Quantitative measurements of the flow rate can be made by a number of methods, including rotameters, orifice meters, soapfilm flow meters and displacement of water. The former two methods are the most con venient but the least accurate; moreover they create a back pressure and are temperature dependent whereas although the moving soap bubble is cumbersome to employ and unusable for continuous readings, it is preferred when the highest accuracy is required.
Author :
Publisher : Springer Science & Business Media
ISBN 13 : 3642481418
Total Pages : 759 pages
Book Rating : 4.6/5 (424 download)
Download or read book Modern Methods of Plant Analysis / Moderne Methoden der Pflanzenanalyse written by and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 759 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : K. Paech
Publisher : Springer Science & Business Media
ISBN 13 : 3642649580
Total Pages : 774 pages
Book Rating : 4.6/5 (426 download)
Download or read book Moderne Methoden der Pflanzenanalyse / Modern Methods of Plant Analysis written by K. Paech and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: If, following the solvent extraction of a hydrocarbon from a plant, it is not known whether it is one or the other, a method of distinguishing the two is described by HENDRICKS, WILDMAN and JONES (1946). The technique involves the infra-red absorption spectra of the two isomers. At about 12 mp. the relative absorption coefficient of rubber is 42% greater than for gutta. ScHLESINGER and LEPER (1951) describe two procedures for separation of the rubber and gutta hydrocarbons from large quantities of crude chicle. In one, the chicle is extracted with benzene which dissolves both isomers. An excess absolute ethyl acetate is added and the mixture stored at 5° C overnight. The gutta precipitates out and the rubber remains in solution. The other method is as follows: (1) Ten grams of chicle are extracted with acetone for 24 hours in a Soxhlet extraction apparatus. (2) The insoluble material in the thimble is allowed to .. it dry, then immersed in 150 ml. of cold Skellysolve B in a refrigerator at 10° C and· allowed to stand for 48 hours with occasional agitation. (3) The thimble is then removed from the solvent and the enclosed residue washed several times with fresh, cold Skellysolve B. (4) An excess of acetone and a few drops of a concentrated aqueous solution of sodium iodide are added to the combined Skellysolve B extract and washings and allowed to stand overnight in a refrigerator.
Author : K. Paech
Publisher : Springer Science & Business Media
ISBN 13 : 3642649610
Total Pages : 781 pages
Book Rating : 4.6/5 (426 download)
Download or read book Modern Methods of Plant Analysis / Moderne Methoden der Pflanzenanalyse written by K. Paech and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 781 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Amitav Bhattacharya
Publisher : Academic Press
ISBN 13 : 0128176059
Total Pages : 628 pages
Book Rating : 4.1/5 (281 download)
Download or read book Effect of High Temperature on Crop Productivity and Metabolism of Macro Molecules written by Amitav Bhattacharya and published by Academic Press. This book was released on 2019-06-14 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: Effect of High Temperature on Crop Productivity and Metabolism of Macro Molecules presents a comprehensive overview on the direct effect of temperatures defined as "high", a definition which increasingly includes a great number of geographic regions. As temperature impacts the number of base growth days, it is necessary to adapt plant selection, strategize planting times, and understand the expected impact of adaptive steps to ensure maximum plant health and crop yield. Global warming, climate change and change in environmental conditions have become common phrases in nearly every scientific seminar, symposium and meeting, thus these changes in climatic patterns constrain normal growth and reproduction cycles. This book reviews the effect of high temperature on agricultural crop production and the effect of high temperature stress on the metabolic aspects of macro molecules, including carbohydrates, proteins, fats, secondary metabolites, and plant growth hormones. Focuses on the effects of high temperature on agriculture and the metabolism of important macro-molecules Discusses strategies for improving heat tolerance, thus educating plant and molecular breeders in their attempts to improve efficiencies and crop production Provides information that can be applied today and in future research
Author : Simone Badal McCreath
Publisher : Elsevier
ISBN 13 : 0443186588
Total Pages : 847 pages
Book Rating : 4.4/5 (431 download)
Download or read book Pharmacognosy written by Simone Badal McCreath and published by Elsevier. This book was released on 2023-10-13 with total page 847 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pharmacognosy: Fundamentals, Applications and Strategies, Second Edition represents a comprehensive compilation of the philosophical, scientific and technological aspects of contemporary pharmacognosy. The book examines the impact of the advanced techniques of pharmacognosy on improving the quality, safety and effectiveness of traditional medicines, and how pharmacokinetics and pharmacodynamics have a crucial role to play in discerning the relationships of active metabolites to bioavailability and function at the active sites, as well as the metabolism of plant constituents. Structured in seven parts, the book covers the foundational aspects of Pharmacognosy, the chemistry of plant metabolites, their effects, other sources of metabolites, crude drugs from animals, basic animal anatomy and physiology, technological applications and biotechnology, and the current trends in research. New to this edition is a chapter on plant metabolites and SARS-Cov-2, extensive updates on existing chapters and the development of a Laboratory Guide to support instructors execute practical activities on the laboratory setting. Covers the main sources of natural bioactive substances Contains practice questions and laboratory exercises at the end of every chapter to test learning and retention Describes how pharmacokinetics and pharmacodynamics play a crucial role in discerning the relationships of active metabolites to bioavailability and function at active sites Includes a dedicated chapter on the effect of plant metabolites on SARS-CoV-2
Author : J.P. Miksche
Publisher : Springer Science & Business Media
ISBN 13 : 3662125234
Total Pages : 303 pages
Book Rating : 4.6/5 (621 download)
Download or read book Modern Methods in Forest Genetics written by J.P. Miksche and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present volume contains papers developed from courses given at the International Union of Forest Research Organizations (IUFRO) Bio chemical Genetics Workshop (Working Party S.04-5) held at the Univer sity of Gottingen, Germany on July 5 through 28, 1973. The workshop was organized by Professor Robert G. Stanley and was held in memory of Professor Klaus Stern. Unfortunately, both met with untimely deaths. Professor Stanley was also instrumental in initiating the process of having the workshop proceedings published. I was asked by the workshop participants to complete this task, and I wish to acknowledge their cooperation, advice and encouragement. In addition to the courses and subsequent papers resulting from the above workshop, we have included some papers by colleagues who were unable to attend the meeting. The contents of this text may, there fore, be considered a working-manual of generally "modern" techniques that are applicable to forest genetics and breeding programs. The chapters are placed in five major categories. The first three categories follow according to classes of chemical constituents in herent to plants which are nucleic acids (DNA, RNA) , primary gene products (amino acids, proteins and enzymes) and primary and secon dary metabolites (carbohydrate polymers, resins, phenolics, pigments, etc.). The fourth category is concerned with the interaction of en vironment and gene systems. Indirect selection, crossing and proto plasmic and flowering manipulation are factors covered in the fifth category.
Author :
Publisher :
ISBN 13 :
Total Pages : 1438 pages
Book Rating : 4.U/5 (183 download)
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1964 with total page 1438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Erich Heftmann
Publisher : Elsevier
ISBN 13 : 0323146449
Total Pages : 558 pages
Book Rating : 4.3/5 (231 download)
Download or read book Modern Methods of Steroid Analysis written by Erich Heftmann and published by Elsevier. This book was released on 2012-12-02 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern Methods of Steroid Analysis reviews modern methods of steroid analysis such as liquid column chromatography, mass spectrometry, and gas chromatography. Topics covered include qualitative and quantitative analysis of plant sterols by gas-liquid chromatography; Raman spectroscopy of steroids; nuclear magnetic resonance; and applications of lanthanide shift reagents. A computerized method for rapid comparison and retrieval of infrared spectral data is also described. This volume is comprised of 22 chapters and begins with an analysis of hormonal steroids using liquid column chromatography, followed by a discussion on the separation of insect molting hormones using high-pressure liquid chromatography. The reader is methodically introduced to the application of gradient elution and thin-layer chromatography to the analysis of corticosteroids and 17-ketosteroids, as well as some aspects of mass spectrometry in steroid analysis. Subsequent chapters explore other methods such as optical rotatory dispersion and circular dichroism, along with radioisotope techniques. In particular, the radioimmunoassay of plasma steroid hormones and plasma aldosterone is considered. This book should be of interest to biochemists.
Author : Karl Paech
Publisher :
ISBN 13 :
Total Pages : 792 pages
Book Rating : 4.:/5 (318 download)
Download or read book Moderne Methoden der Pflanzenanalyse written by Karl Paech and published by . This book was released on 1955 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Library of Congress. Copyright Office
Publisher : Copyright Office, Library of Congress
ISBN 13 :
Total Pages : 1672 pages
Book Rating : 4.F/5 ( download)
Download or read book Catalog of Copyright Entries. Third Series written by Library of Congress. Copyright Office and published by Copyright Office, Library of Congress. This book was released on 1957 with total page 1672 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes Part 1, Number 1 & 2: Books and Pamphlets, Including Serials and Contributions to Periodicals (January - December)
Author :
Publisher :
ISBN 13 :
Total Pages : 1740 pages
Book Rating : 4.:/5 (31 download)
Download or read book New Serial Titles written by and published by . This book was released on 1991 with total page 1740 pages. Available in PDF, EPUB and Kindle. Book excerpt: A union list of serials commencing publication after Dec. 31, 1949.
Author : Inga Mewis
Publisher : Frontiers Media SA
ISBN 13 : 2889717054
Total Pages : 145 pages
Book Rating : 4.8/5 (897 download)
Download or read book Effects of Different Light Spectra on Secondary/Specialized Metabolite Accumulation and Plant Resistance Mechanisms written by Inga Mewis and published by Frontiers Media SA. This book was released on 2021-11-26 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : University of California (System). Institute of Library Research
Publisher :
ISBN 13 :
Total Pages : 950 pages
Book Rating : 4.F/5 ( download)
Download or read book University of California Union Catalog of Monographs Cataloged by the Nine Campuses from 1963 Through 1967: Authors & titles written by University of California (System). Institute of Library Research and published by . This book was released on 1972 with total page 950 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Karl Paech
Publisher :
ISBN 13 :
Total Pages : 544 pages
Book Rating : 4.3/5 (91 download)
Download or read book Modern Methods of Plant Analysis written by Karl Paech and published by . This book was released on 1955 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
