Author: Marie-Caroline Michalski-Veillerot
Publisher:
ISBN:
Category :
Languages : fr
Pages : 188
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Book Description
L’adhésion des aliments aux matériaux solides pose des problèmes de sécurité alimentaire, de nettoyage industriel et de récupération des emballages. Dans cette étude, nous avons défini l'adhésion d'huiles végétales et d'émulsions huile-dans-eau concentrées comme étant la masse résiduelle restant sur les surfaces de matériaux solides après écoulement. Des matériaux d'hydrophilie variable (polymères, verre, acier inox) et des surfaces de verre de différentes rugosités ont été étudiés. La tension superficielle du verre était composée à 50% d'interactions dispersives, contre 99% pour le polyéthylène. Pour les huiles végétales, nous avons montré le rôle de la viscosité de l'huile et de l'apolarité du matériau solide sur l'adhésion. L’adhésion des huiles était corrélée au travail d'adhésion théorique. Pour les émulsions, nous avons montré le rôle sur l'adhésion des tensioactifs, présents en phase continue et adsorbés sur le matériau solide et les globules gras. Les paramètres majeurs pour la présence ou non de résidus d'émulsion sur les matériaux solides sont la tension superficielle et l'hydrophilie des matériaux. Lorsque ces paramètres sont suffisamment élevés, il y a mouillage et les propriétés rhéologiques des émulsions régissent l'adhésion finale. Sur les surfaces de verre abrasées, l'adhésion des huiles et des émulsions sans seuil d'écoulement augmente d'abord avec la rugosité, puis atteint un plateau. Pour les émulsions à seuil, l'adhésion augmente continuellement avec la rugosité. Nous avons conclu que, pour celles-ci, le glissement pouvant apparaitre sur surfaces lisses était diminué par la rugosité. Nous avons finalement établi un modèle empirique prédisant la masse résiduelle d'huiles et d'émulsions restant adhérée aux surfaces de matériaux solides après écoulement.
Author: Alfonso Jiménez
Publisher: Royal Society of Chemistry
ISBN: 1849738793
Category : Science
Languages : en
Pages : 374
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Book Description
A comprehensive overview of the synthesis, characterisation, properties and applications of poly(lactic acid) science and technology covering scientific, ecological, social and economic issues.
Author: Don Montague
Publisher: Taylor & Francis
ISBN: 9780419199106
Category : Architecture
Languages : en
Pages : 472
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Book Description
This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Author: Satinder Kaur Brar
Publisher: Springer Science & Business Media
ISBN: 1461480051
Category : Science
Languages : en
Pages : 500
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Book Description
Agro-industrial wastes are end-products emerging after industrial processing operations and also from their treatment and disposal e.g. solid fruit wastes and sludge. The agro-industrial wastes are often present in multiphase and comprise multicomponent. Nevertheless, these wastes are a goldmine as they possess valuable organic matter which can be diverted towards high value products ranging from polymers to antibiotics to platform chemicals. There have been plenty of books published on bioenergy, enzymes and organic acids, among others. However, this emerging field of biochemical has not yet been covered so far which is an important entity of the biorefinery model from waste biomass and needs to be understood from fundamental, applied as well as commercial perspective which has been laid out in this book.
Author: Leslie Rainer
Publisher: Getty Publications
ISBN: 1606060430
Category : Architecture
Languages : fr
Pages : 438
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Book Description
Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Author: Satinder Kaur Brar
Publisher:
ISBN: 9781619428034
Category : Agricultural pests
Languages : en
Pages : 0
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Book Description
Agricultural and forest pests lead to many plant diseases resulting in poor yield and productivity. Traditionally, chemical pesticides have been used to control these pests. However, the adverse health impacts of chemical pesticides have triggered parallel research in safe biological options. Nevertheless, biocontrol has come a long way ever since the commercialisation of the first Bacillus thuringiensis based biopesticide (sporeine) in the 1940s, however, still there are research gaps. New knowledge and practical experiences have been added over the last few decades. This book reviews research on biological control agents, including bacterial, fungal and viral biopesticides along with their advanced formulation options.
Author: Asphalt Institute
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 184
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Book Description
Author: Osvaldo Jaeggli
Publisher: ISSN
ISBN: 9783112420218
Category : Language Arts & Disciplines
Languages : en
Pages : 0
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Book Description
The architecture of the human language faculty has been one of the main foci of the linguistic research of the last half century. This branch of linguistics, broadly known as Generative Grammar, is concerned with the formulation of explanatory formal accounts of linguistic phenomena with the ulterior goal of gaining insight into the properties of the 'language organ'. The series comprises high quality monographs and collected volumes that address such issues. The topics in this series range from phonology to semantics, from syntax to information structure, from mathematical linguistics to studies of the lexicon. To discuss your book idea or submit a proposal, please contact Birgit Sievert
Author: Wolfgang Babel
Publisher: Springer
ISBN: 3540400214
Category : Technology & Engineering
Languages : en
Pages : 345
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Book Description
Living systems synthesize seven different classes of polymers. They provide structure and form for cells and organisms, function as catalysts and energy storage and carry the genetic information. All these polymers possess technically interesting properties. Some of these biopolymers are already used commercially. This special volume of Advances in Biochemical Engineering/Biotechnology comprises 10 chapters. It gives an overview of the water insoluble biopolyesters, in particular of the microbially synthesized poly-hydroxyalkanoate (PHA) family. It reports the state of the art of metabolism, regulation and genetic background, the latest advances made in genetic optimization of bacteria, "construction" of transgenic plants and in vitro synthesis by means of purified enzymes. Furthermore, it describes relevant technologies and evaluates perspectives concerning increasing the economic viability and competitiveness of PHA and discusses applications in medicine, packaging, food and other fields.
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.
