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محصولات
Negotiation: Everyday Skills and Techniques: 10 Essential, Easy To Follow Steps for Persuasion and Negotiation in Real-World and Everyday Scenarios in Work or at Home - Epub + Converted Pdf
نویسندگان: خلاصه: Negotiation: Everyday Skills and Techniques: 10 Essential, Easy To Follow Steps for Persuasion and Negotiation in Real-World and Everyday Scenarios in Work or at Home by Tom Hearn
Rose Lore: Essays in Semiotics and Cultural History - Original PDF
نویسندگان: خلاصه: he essays in Rose Lore are a rendering of global cultural history, literature, and metaphysics, woven together in a collection that will be valuable to several disciplines. The essays present numerous qualities of the rose as a symbol with broad cultural, social, and historical meanings: from astrology, to the history of Catholicism, to the new anti-female genital mutilation global movement.
Water-Soluble Polymers : Solution Properties and Applications - Original PDF
نویسندگان: خلاصه: This volume contains a series of papers originally presented at the symposium on Water Soluble Polymers: Solution Properties and Applications, sponsored by the Division of Colloids and Surface Chemistry of the American Chemical Society. The symposium took place in Las Vegas City, Nevada on 9 to 11th September, 1997 at the 214th American Chemical Society National Meeting. Recognized experts in their respective fields were invited to speak. There was a strong attendance from academia, government, and industrial research centers. The purpose of the symposium was to present and discuss recent developments in the solution properties of water soluble polymers and their applications in aqueous systems
Structured Fluids: Polymers, Colloids, Surfactants - Original PDF
نویسندگان: خلاصه: Over the last thirty years, the study of liquids containing polymers, surfactants, or colloidal particles has developed from a loose assembly of facts into a coherent discipline with substantial predictive power. These liquids expand our conception of what condensed matter can do. Such structured-fluid phenomena dominate the physical environment within living cells. This book teaches how to think of these fluids from a unified point of view showing the far-reaching effects of thermal fluctuations in producing forces and motions. Keeping mathematics to a minimum, the book seeks the simplest explanations that account for the distinctive scaling properties of these fluids. An example is the growth of viscosity of a polymer solution as the cube of the molecular weight of the constituent polymers. Another is the hydrodynamic radius of a colloidal aggregate, which remains comparable to its geometrical radius even though the density of particles in the aggregate becomes arbitrarily small. The book aims for a simplicity, unity and depth not found in previous treatments, and includes numerous figures, tables and problems. It will be an ideal textbook for teaching undergraduates in physical science how to understand soft matter, but will also be of interest to industrial scientists, who want to gain a broader understanding of soft matter systems
Absorbable biodegradable polymers - Original PDF
نویسندگان: خلاصه: Egyptians sutured wounds as early as 3500 B.C. using a variety of natural polymers including treated intestines, which are the early versions of collagen-based surgical gut sutures.1 Synthetic, absorbable polyesters based on 2-hydroxyacetic acids were developed for preparing less tissue reactive alternatives to surgical gut sutures in the early 1970s. In addition to collagenbased polymers, other natural, absorbable polymers, such as albumin, chitosan, and hyaluronic acid and derivatives thereof have been used for many pharmaceutical and biomedical applications for several decades.2 Of these polymers, the application of chitosan and hyaluronic acid–based polymers has received a great deal of attention in the past 15 years for use in controlled drug delivery systems, tissue repair, tissue engineering, and controlling certain biological events.
Colloids and interfaces with surfactants and polymers: an introduction - Original PDF
نویسندگان: خلاصه: This text is both an introduction to the field and a bridge to the more specialist texts that are available, and includes recent ideas that have been developed on the interactions between particles and the concentrated state. It covers the fundamentals of colloid and interface science, placing emphasis on concentrated systems and the ideas associated with them. Takes a user-friendly, non-mathematical approach Includes the widely used techniques such as rheology in greater depth than other introductory texts Gives many practical examples of colloid and interface science Provides guidance on how to apply new ideas to a number of different systems
Handbook of Industrial Water Soluble Polymers - Original PDF
نویسندگان: خلاصه: Natural and synthetic water soluble polymers are used in a wide range of familiar industrial and consumer products, including coatings and inks, papers, adhesives, cosmetics and personal care products. They perform a variety of functions without which these products would be significantly more expensive, less effective or both.Written for research, development and formulation chemists, technologists and engineers at graduate level and beyond in the fine and specialty chemicals, polymers, food and pharmaceutical industries, the Handbook of Industrial Water Soluble Polymers deals specifically with the functional properties of both natural and synthetic water soluble polymers. By taking a function based approach, rather than a "polymer specific" approach the book illustrates how polymer structure leads to effect, and shows how different polymer types can be employed to achieve appropriate product properties.
Synthetic Polymers for Biotechnology and Medicine - Original PDF
نویسندگان: خلاصه: One of the most powerful group of chemicals in the body are organic compounds collectively referred to as hormones. The glands responsible for the production and release of hormones comprise the endocrine system. Endocrine activities have been identified in certain organs, such as the heart, kidneys, duodenum, liver and the islets of Langerhans in the pancreas (which contains the insulin gland), which are normally associated with other system functions. There have been numerous attempts to replace organ function using cell transplantation including direct injections of dissociated cells into organs such as the liver, kidney or spleen.1-5 Subcutaneous and intraperitoneal routes have also been evaluated.6-10 More recent investigations have applied extracellular matrix polymers as structural supports for cell transplantation and immunoprotection.11,12 Potential medical applications of such “artificial cells” or “tissue engineered” organoids include an extracorporeal bioartificial liver for detoxification,2 artificial red blood substitutes,13 the extracorporeal artificial kidney for hemodialysis,14 immunosorbents15 and drug delivery systems.16The transplantation of immunoisolated (microencapsulated) cells represents another emerging area in biotechnology research and commercialization. Under such a scenario, the encapsulated cells, which could be a xenograft, would be hidden from the immune system of the body, but would still be able to respond to extracellular stimuli (e.g., blood glucose), with the required hormone, in the case of diabetes therapy insulin, secreted into the systemic circulation. Other applications of the microencapsulation concept include the encapsulation of genetically modified cells, which represents a novel approach to somatic gene therapy.17 This chapter will review recent advances in cell encapsulation from material science, technological and tissue-related perspectives. Cell coating, microencapsulation devices and bioartificial organs will be discussed with the artificial pancreas and treatment of diabetes used as a case study denominator throughout the review.
Nanocomposites of Polymers and Inorganic Particles - Original PDF
نویسندگان: خلاصه: This chapter deals with composites comprised of polymers and inorganic nanoparticles of rather uniform shape. Such composites are attributed to the class of nanocomposites because of the small size of the embedded particles, while the polymer phase is continuous. The attribution of particles to the class of nanoparticles is somewhat arbitrary; often particles of dimensions up to 50–100 nm are assigned to this notion, and expressions such as nanosized particles, colloids, or, occasionally, ultrafine particles are also used to designate particles as nanoparticles. The small size of the incorporated particles can induce materials properties which differ from those of related composites containing larger particles, for example, as a result of an extremely large interface area, which can readily amount to 107–109 m2 in a cube meter of nanocomposite, or a markedly reduced scattering of visible light. The latter is important if transparent or translucent materials are required for optical applications. This intensity loss of transmitted light by scattering can be estimated with the equationآیا کتاب مورد نظر هنوز بر روی سایت قرار نگرفته است؟ جای نگرانی نیست! کافی است بر روی گزینه سفارش کتاب کلیک کرده و درخواست خود را ثبت کنید. در کمتر از چند ساعت کتاب شما را آماده خواهیم کرد.