Book Description
Quel que soit le domaine d'application, les membranes doivent fréquemment subir des procédures de nettoyage et/ou de désinfection afin d'éliminer le colmatage qui découle de la filtration. Ces nettoyages sont responsables d'une accélération du vieillissement des matériaux qui impacte directement les performances techniques et économiques des procédés membranaires. La pérennité de ces derniers passe par l'identification des principaux facteurs responsables du vieillissement et par la compréhension des mécanismes qui le régissent. Le vieillissement statique de membranes d'ultrafiltration spiralée en polyethersulfone et fibres creuses en polysulfone respectivement utilisées pour la filtration du lait et pour la production d'eau potable a été étudié. Ce vieillissement a été mis en place selon la méthodologie des plans d'expériences qui a permis l'étude simultanée de la concentration, de la température et du temps de contact membrane/détergents et ce, pour différents détergents formulés couramment utilisés sur les sites de production (alcalin, acide, enzymatiques, oxydant chloré et oxydant non chloré). Les résultats ont permis de modéliser statistiquement les modifications membranaires induites par chaque détergent. Ces modifications ont été suivies aussi bien à l'échelle microscopique que macroscopique afin d'appréhender le phénomène de vieillissement dans sa globalité : propriétés de transport, propriétés mécaniques, propriétés de surface, ainsi que les modifications de la composition chimique du polymère constitutif de la membrane. Des préconisations d'utilisation des différents produits sont proposées : véritable carnet de bord les industriels.
Author: I. E. Coop Publisher: Elsevier Science & Technology ISBN: Category : Technology & Engineering Languages : en Pages : 520
Book Description
Ecology and distribution; Breeding; Reproduction; Maintenance and growth; Pregnancy; Lactation of suckling ewes and does; Nutritional diseases; Infectious diseases of sheep and goats; Internal parasites of sheep and goats; External parasites of sheep and goats; Growth and characteristics of wool and hair; Wiik grading and marketing; Livestock and meat marketing and grading; Carcase and meat qualities; Milk production in sheep and goats; Systems, biological and economic efficiencies; Very extensive systems; Extensive grazing systems; Intensive grassland systems; Intensive arable systems; Very intensive systems; Government controlled systems; Migratory (Transhumance) systems; Nomadic systems; Village and smallholder systems; List of contributors.
Author: Miller Publisher: VSP ISBN: 9004174958 Category : Science Languages : en Pages : 567
Book Description
The book aims at describing the most important experimental methods for characterizing liquid interfaces, such as drop profile analysis, bubble pressure and drop volume tensiometry, capillary pressure technique, and oscillating drops and bubbles.
Author: Agnes Buka Publisher: World Scientific ISBN: 1848167997 Category : Science Languages : en Pages : 299
Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: Jean-Marie Basset Publisher: John Wiley & Sons ISBN: 3527627103 Category : Science Languages : en Pages : 725
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: David Khayat Publisher: W. W. Norton & Company ISBN: 0393246477 Category : Health & Fitness Languages : en Pages : 227
Book Description
With the huge number of studies on nutrition and cancer available, it's impossible for a person to sort through them all to come up with practical recommendations. Now, Dr. David Khayat, a world-renowned oncologist, has done that hard work for you. In this international bestseller, Dr. Khayat provides easy-to-follow—and often surprising—guidelines on what are now known to be the foods most likely to reduce the risk of cancer. For those of a scientific bent, he explains what cancer is and how it develops. Bringing together his own research with that of other major cancer specialists, he breaks down what the studies mean, which ones provide the most solid evidence, and how to use their results in your and your family’s diet. Structured by the major food groups—as well as supplements, beverages, and exercise—The Anticancer Diet may surprise you by not disparaging red meat but alerting you to find out the source of your fish and suggesting sole over salmon. While highly recommending commercial pomegranate juice, it cautions people with fair hair and eyes against drinking orange juice. What stage of life a person is at will also affect what they should consume. Pregnant women, older women, men, and children may process foods differently. With numerous easy-to-read charts and tables along with a comprehensive food list at the back of the book, this accessible, user-friendly guide helps readers realize the power in their everyday choices.
Author: Ronald Ross Watson Publisher: Academic Press ISBN: 0123977649 Category : Technology & Engineering Languages : en Pages : 801
Book Description
Bioactive Food as Dietary Interventions for Liver and Gastrointestinal Disease provides valuable insights for those seeking nutritional treatment options for those suffering from liver and/or related gastrointestinal disease including Crohn's, allergies, and colitis among others. Information is presented on a variety of foods including herbs, fruits, soy and olive oil. This book serves as a valuable resource for researchers in nutrition, nephrology, and gastroenterology. - Addresses the most positive results from dietary interventions using bioactive foods to impact diseases of the liver and gastrointestinal system, including reduction of inflammation, improved function, and nutritional efficiency - Presents a wide range of liver and gastrointestinal diseases and provides important information for additional research - Associated information can be used to understand other diseases, which share common etiological pathways
Author: Alexandru Grumezescu Publisher: Academic Press ISBN: 0128043784 Category : Science Languages : en Pages : 926
Book Description
Encapsulations, a volume in the Nanotechnology in the Agri-Food Industry series,presents key elements in establishing food quality through the improvement of food flavor and aroma. The major benefits of nanoencapsulation for food ingredients include improvement in bioavailability of flavor and aroma ingredients, improvement in solubility of poor water-soluble ingredients, higher ingredient retention during production process, higher activity levels of encapsulated ingredients, improved shelf life, and controlled release of flavor and aroma. This volume discusses main nanoencapsulation processes such as spray drying, melt injection, extrusion, coacervation, and emulsification. The materials used in nanoencapsulation include lipids, proteins, carbohydrates, cellulose, gums, and food grade polymers. Applications and benefits of nanoencapsulation such as controlled release, protections, and taste masking will be explained in detail. Includes the most up-to-date information on nanoencapsulation and nanocontainer-based delivery of antimicrobials Presents nanomaterials for innovation based on scientific advancements in the field Provides control release strategies to enhance bioactivity, including methods and techniques for research and innovation Provides useful tools to improve the delivery of bioactive molecules and living cells into foods
Author: Camille Regula
Author: J. Belle
Author: I. E. Coop
Author: Miller
Author: Agnes Buka
Author: Jean-Marie Basset
Author: David Khayat
Author: 
Author: Ronald Ross Watson
Author: Alexandru Grumezescu