Contribution à l'étude des mécanismes réactionnels entre différents phosphates de calcium et le sulfate d'ammonium PDF Download
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Author: Mohamed Marraha
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Book Description
Author: Mohamed Marraha
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Book Description
Author: Mohamed Marraha
Publisher:
ISBN:
Category :
Languages : fr
Pages : 258
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Book Description
L'auteur étudie les réactions intervenant au cours du chauffage entre différents phosphates de calcium (phosphate tricalcique anhydre Ca3(PO4)2 (βTCP) ; hydroxyapatite Ca10(PO4)6(OH)2 ; phosphate tricalcique apatitique Ca9(HPO4)5(OH) d'une part et le sulfate d'ammonium d'autre part. Il montre que ces réactions font intervenir différentes phosphates condensés et le sulfate de calcium. Lors de la réaction avec l'hydroxyapatite on otient un soilde de structure βTCP contenant CaSo4, tandis qu'au cours des réactions avec βTCP ou le phosphate tricalcique apatitique, on obtient toujours βTCP pur. Une nouvelle série de solides de structure βTCP et contenant CaSO4 (phosphosulfate de calcium ) a été mise en évidence. Sa composition limite correspondrait à la formule (Ca23 )(PO4)14(SO4)2. Ces matériaux constituent de nouvelles biocéramiques. Techniques d'étude utilisé : ATG, R-X, IR, analyse chimique, chromatographie sur papier, mesures de masses volumiques.
Author:
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Category : Chemistry
Languages : en
Pages : 396
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Author: International Atomic Energy Agency
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 462
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Book Description
Organic matter and soil productivity; Turnover of plant residues; Mineralization of organic compounds; Dynamics of organic forms of nitrogen; Nitrogen economy; Biodegradation of organic matter; Biochemical transformation of organic matter; Bitumens in soil organic matter; Characterization of humic acids; Carbon dating; Modern techniques and their implact on soil organic matter research; Sludge; Soil organic matter components and plant metabolism; Interaction between agrochemicals and organic matter; Peat.
Author: Konstantinos N. Papadopoulos
Publisher: Nova Publishers
ISBN: 9781604562620
Category : Science
Languages : en
Pages : 320
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Book Description
Food chemistry is the study of chemical processes and interactions of all biological and non-biological components of foods. The biological substances include such items as meat, poultry, lettuce, beer, and milk as examples. It is similar to biochemistry in its main components such as carbohydrates, lipids, and protein, but it also includes areas such as water, vitamins, minerals, enzymes, food additives, flavours, and colours. This discipline also encompasses how products change under certain food processing techniques and ways either to enhance or to prevent them from happening. An example of enhancing a process would be to encourage fermentation of dairy products with lactic acid; an example of a preventing process would be stopping the Maillard reaction on the surface of freshly cut Red Delicious apples whether by hand or mechanical methods. This book presents the recent research from around the world in this field.
Author: John J. Burns
Publisher:
ISBN:
Category : Ammonium compounds
Languages : en
Pages : 60
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Author: K. Paijmans
Publisher: Elsevier Science & Technology
ISBN:
Category : Science
Languages : en
Pages : 240
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Author: Kalliopi A. Roubelakis-Angelakis
Publisher: Springer Science & Business Media
ISBN: 9401723087
Category : Science
Languages : en
Pages : 486
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Book Description
Grapevine is one of the major cultivated plant crops. As with most woody plant species, molecular biology and biotechnology have progressed at a slow pace, due to several obstacles which have had to be overcome. However, substantial progress has now been made and useful information has been accumulated in the literature; numerous genes have been characterized from grapevine and significant progress has been made in the molecular and non-molecular biotechnological applications. In an effort to collect and present the state of the art on grapevine molecular biology and biotechnology, 41 scientists from 12 countries worked jointly on the preparation of this book. It is intended as a reference book for viticulturists, graduate and undergraduate students, biotechnological companies, and any scientist who is interested in molecular biology and biotechnology of plants with emphasis on grapevine.
Author: Jean-Marie Basset
Publisher: Wiley-VCH
ISBN: 9783527319725
Category : Science
Languages : en
Pages : 725
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Book Description
Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Author: Joseph Jez
Publisher: ASA-CSSA-SSSA
ISBN: 9780891181682
Category : Science
Languages : en
Pages : 362
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Book Description
Sulfur forms and cycling processes in soil and their relationship to sulfur fertility / Jeff J. Schoenau and Sukhdev S. Malhi -- Sulfur nutrition of crops in the Indo-Gangetic plains of South Asia / M.P.S. Khurana, U.S. Sandana and Bijay-Singh -- Soil sulfur cycling temperate agricultural systems / Jørgen Eriksen -- History of sulfur deficiency in crops / Silvia Haneklaus, Elke Bloem and Ewald Schnug -- Availability of sulfur to crops from soil and other sources / Warren A. Dick, David Kost and Liming Chen -- Sulfur and cysteine metabolism / Rainer Hoefgen and Holger Hesse -- Sulfur response based on crop, source, and landscape position / Dave Franzen and Cynthia A. Grant -- Sulfur management for soybean production / Kiyoko Hitsuda [and others] -- Sulfur in a fertilizer program for corn / George W. Rehm and John G. Clapp -- Sulfur nutrition and wheat quality / Hamid A. Naeem -- Sulfur and marketable yield of potato / Alexander D. Pavlista -- Sulfur, its role in onion production and related alliums / George E. Boyhan -- Sulfur and the production of rice in wetland and dryland ecosystems / Richard W. Bell -- Evaluation of the relative significance of sulfur and other essential mineral elements in oilseed rape, cereals, and sugar beet production / Ewald Schnug and Silvia Haneklaus -- Improving the sulfur-containing amino acids of soybean to enhance its nutritional value in animal feed / Hari B. Krishnan -- Methionine metabolism in plants / Rachel Amir and Yael Hacham -- Plant sulfur compounds and human health / Joseph M. Jez and Naomi K. Fukagawa -- A future crop biotechnology view of sulfur and selenium / Muhammad Sayyar Khan and Rüdiger Hell.
