Browse Results

Showing 66,201 through 66,225 of 84,378 results

Spherical Crystallization as a New Platform for Particle Design Engineering

by Yoshiaki Kawashima

This book describes the principles and applications of the spherical crystallization technique, from the standpoint of its inventor. After an introduction on the history of particle design engineering and nanotechnology, the concept of spherical crystallization itself is clearly explained. Attention then turns to the application of spherical crystallization in pharmaceutical processes. It is explained how the technique can provide physicochemical properties suitable for direct tableting of active pharmaceutical ingredients and how it has enabled the development of a novel particulate design platform from single to complex system. Subsequent chapters describe the roles of polymeric spherical crystallization in the preparation of novel microspheres, microballoons for drug delivery systems (DDS) and the development of biocompatible and biodegradable poly(D,L-lactide-co-glycolide) (PLGA) nanospheres. The various applications of PLGA nanospheres composite within oral-, pulmonary-, transdermal DDS and cosmetics are fully discussed. Finally, future perspectives are presented on use of the technology in the design and industrial-scale manufacture of new drug delivery systems, highlighting how a continuous pharmaceutical process that meets US Food and Drug Administration quality requirements should soon be introduced.

Spherical Harmonics and Approximations on the Unit Sphere: An Introduction

by Kendall Atkinson Weimin Han

These notes provide an introduction to the theory of spherical harmonics in an arbitrary dimension as well as an overview of classical and recent results on some aspects of the approximation of functions by spherical polynomials and numerical integration over the unit sphere. The notes are intended for graduate students in the mathematical sciences and researchers who are interested in solving problems involving partial differential and integral equations on the unit sphere, especially on the unit sphere in three-dimensional Euclidean space. Some related work for approximation on the unit disk in the plane is also briefly discussed, with results being generalizable to the unit ball in more dimensions.

Spherical and Fibrous Filler Composites

by Vikas Mittal

Scrutinizing various fillers, such as fly ash, inorganic nanoparticles, Kevlar and wood flour, this book exemplifies how the choice of filler influences the micro- and macroscopic behavior of the resulting polymer composites, such as friction, wear and impact resistance. In so doing, the text brings together a number of composite systems using different polymer matrices, different filler systems as well as different processing conditions, thereby serving as a beneficial guide for readers so as to select a particular set of processing conditions or composite constituents for the enhancement of certain properties.

Sphingolipids in Disease

by Irina Petrache Erich Gulbins

Sphingolipids are lipid components of the plasma membrane of eukaryotic cells with an important function in signaling mechanisms in the cell. This book provides insight into the physiological and pathophysiological role of sphingolipids and in particular its derivative ceramide. The function of Sphingolipids in cell signaling with regard to infectious and lung diseases, cancer, cardiovascular diseases and neuropsychiatric disorders are described and treated in distinct parts. Together with Volume 215 from the same Editors, the collection represents a unique, comprehensive work on Sphingolipids, providing information on both: Sphingolipid basic biology as well as its important function in a (patho)physiological context. The book is written for scientists in pharmacology, biochemistry and cell biology with a focus on biomedical research as well as for clinicians in pharmacology, oncology, cardiology, neurology and infectious disease.

Sphingolipids: Basic Science and Drug Development

by Irina Petrache Erich Gulbins

Sphingolipids are lipid components of the plasma membrane in eukaryotic cells. They have an important function in signaling mechanisms in the cell. This book on sphingolipids provides insights into the basics of sphingolipid biology and drug development, with a particular emphasis on the sphingolipid derivative ceramide. In the first part basic functions of sphingolipids are described, as well as the genetics of important enzymes, sphingolipid metabolism and synthesis. The second part of this first volume focuses on drug development and pharmacology. The book is intended for scientists in pharmacology, biochemistry and cell biology with a focus on biomedical research as well as for clinicians working in pharmacology, oncology, cardiology, neurology and infectious disease. Together with Volume 216 by the same editors, the collection represents a unique, comprehensive work on sphingolipids, providing information on both sphingolipids' basic biology (including synthesis, metabolism and cell biology) and their important function in a (patho-)physiological context.

Sphingosine-1-Phosphate

by Kursad Turksen Alice Pébay

Sphingosine-1-phosphate is a bioactive lysophospholipid which has become, in recent years, the focus of much research interest as it has widespread developmental and physio-pathological actions, controlling events within the nervous, reproductive, gastrointestinal, vascular, respiratory, and immune systems, in addition to having a prominent role in cancer, early mammalian embryogenesis, and stem cells. In Sphingosine-1-Phosphate: Methods and Protocols, worldwide experts in the S1P field describe in-depth techniques in an array of cell types and with various physiological applications, showcasing the important effects of S1P in development and in physiopathology. As a volume in the Methods in Molecular BiologyTM series, chapters contain introductions to their respective topics, lists of the relevant materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips for troubleshooting and avoiding known pitfalls. Authoritative and timely, Sphingosine-1-Phosphate: Methods and Protocols is a key resource for scientists working in this expanding and dynamic field.

Sphingosine-1-Phosphate

by Kursad Turksen Alice Pébay

Sphingosine-1-phosphate is a bioactive lysophospholipid which has become, in recent years, the focus of much research interest as it has widespread developmental and physio-pathological actions, controlling events within the nervous, reproductive, gastrointestinal, vascular, respiratory, and immune systems, in addition to having a prominent role in cancer, early mammalian embryogenesis, and stem cells. In Sphingosine-1-Phosphate: Methods and Protocols, worldwide experts in the S1P field describe in-depth techniques in an array of cell types and with various physiological applications, showcasing the important effects of S1P in development and in physiopathology. As a volume in the Methods in Molecular Biology(tm) series, chapters contain introductions to their respective topics, lists of the relevant materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips for troubleshooting and avoiding known pitfalls. Authoritative and timely, Sphingosine-1-Phosphate: Methods and Protocols is a key resource for scientists working in this expanding and dynamic field.

Sphingosine-1-Phosphate Signaling in Immunology and Infectious Diseases

by Hugh Rosen Michael B. A. Oldstone

This volume focuses on the role of sphingosine-1-phosphate (S1P) and its analogs in the induced sequestration of lymphocytes in secondary lymphoid organs or in the microenvironment of tissues involved in infection or autoimmune disease. Initial chapters define the pathways to understand S1P signaling. They cover the organization of signaling systems, the structural biology of the S1P1 receptor, and the chemical and genetic tools that are available and useful to explore this area of research and therapeutics. The later chapters highlight S1P and endothelial integrity, lymphocyte migration in the spleen, and S1P agonist in controlling immunopathologic manifestations of acute respiratory influenza virus infection (in the lung), and its accompanying cytokine storm as well as immunopathologic disease of the central nervous system, including the beginning of treatments in multiple sclerosis. One chapter reveals the possible involvement of other lipid molecules, their use for better understanding lipid signaling, and their potential in the modulation of immune responses.

Spi-ku: A Clutter of Short Verse on Eight Legs

by Leslie Bulion

Leslie Bulion, award-winning educator favorite and master of science poetry, is back with a humorous exploration of the silk-spinning, bungee-jumping, hunting, trapping, trick-filled world of spiders!Meet spiders that spit silk, roll like wheels, scuba dive, hide under trap doors, strum tunes, and so much more. Watch as they find mates, find prey...or find mates that become prey!Award-winning poet Leslie Bulion and illustrator Robert Meganck team up again for this clutter (a collective noun for spiders) of short poems and humorously accurate illustrations celebrating the amazing attributes of Araneae. The book is also packed with helpful sidebars, call-outs, and back matter, including a glossary of science terms, a description of the poetic forms, a list of common and scientific names, a spider-hunting adventure how-to, resources for further study, and a relative-size chart. A feast for science and animal fans!

Spic-and-Span!: Lillian Gilbreth's Wonder Kitchen (Great Idea Series #6)

by Monica Kulling

Born into a life of privilege in 1878, Lillian Moller Gilbreth put her pampered life aside for one of adventure and challenge. She and her husband, Frank, became efficiency experts by studying the actions of factory workers. They ran their home efficiently, too. When Frank suddenly died, Lillian was left to her own devices to raise their eleven children. Eventually, she was hired by the Brooklyn Borough Gas Company to improve kitchen design, which was only the beginning. Lillian Gilbreth was the subject of two movies (Cheaper by the Dozen and Belles on Their Toes), the first woman elected to the National Academy of Engineering, and the first female psychologist to have a U.S. postage stamp issued in her honor. A leading efficiency expert, she was also an industrial engineer, a psycologist, an author, a professor, and an inventor.

Spices, Scents and Silk: Catalysts of World Trade

by James Hancock

Spices, scents and silks were at the centre of world trade for millennia. Exotic luxuries such as cinnamon, ginger, pepper, saffron, clove, frankincense and myrrh. Through their international trade, humans were pushed to explore and then travel to the far corners of the earth. Almost from their inception, the earliest great civilizations - Egypt, Sumer and Harappa - became addicted to the luxury products of far-off lands and established long-reaching trade networks. Over time, great powers fought mightily for the kingdoms where silk, spices and scents were produced. The New World was accidentally discovered by Columbus in his quest for spices. What made trade in these products so remarkable was that the plants producing them grew in very restricted areas of the world, distant from the wealthy civilizations of northern Africa, Greece and Europe. These luxuries could be carried from mysterious locations on the backs of camels or in the holds of ships for months on end, and arrived at their final destination in nearly perfect condition. Once the western world discovered the intoxicating properties of these products, their procurement became a dominant force in the world economy. Nothing else compared with their possible profit returns. In this book, eminent horticulturist and author James Hancock examines the origins and early domestication and culture of spices, scents and silks and the central role they played in the lives of the ancients. The book also traces the development of the great international trade networks and explores how struggles for trade dominance and demand for such luxuries shaped the world. Recommended for academics, students and general readers with an interest in crop and agricultural development, world trade, economic botany, history of food, and global economics and public policy, Spices, Scents and Silk offers a fascinating and insightful history.

Spices: Leafy Spices

by V. Prakash

Leafy Spices discusses the botany, cultivation, harvesting and processing, chemical composition, processing methods, varietal differences and end uses for the leaves and essential oils of leafy spices. The book emphasizes botany and cultivation, identifies which seasons are best for harvesting to achieve a maximum oil yield, and explains the care needed to ensure successful cultivation and oil extraction. Leaf and oil composition is discussed, and the medicinal uses of the leaves, as well as their use as food flavorings, are examined in detail. Species covered include basil, bay, bergamot, borage, burnet, capers, camomile, chervil, chives, coriander, costmary, curry leaf, marjoram, mint, oregano, parsley, rosemary, sage, savory, tarragon, and thyme. This book is an ideal reference volume for botanists, food scientists, technologists, and flavor chemists.

Spider Behaviour: Flexibility and Versatility

by Marie Elisabeth Herberstein

Spiders are often underestimated as suitable behavioural models because of the general belief that due to their small brains their behaviour is innate and mostly invariable. Challenging this assumption, this fascinating book shows that rather than having a limited behavioural repertoire, spiders show surprising cognitive abilities, changing their behaviour to suit their situational needs. The team of authors unravels the considerable intra-specific as well as intra-individual variability and plasticity in different behaviours ranging from foraging and web building to communication and courtship. An introductory chapter on spider biology, systematics and evolution provides the reader with the necessary background information to understand the discussed behaviours and helps to place them into an evolutionary context. Highlighting an under-explored area of behaviour, this book will provide new ideas for behavioural researchers and students unfamiliar with spiders as well as a valuable resource for those already working in this intriguing field.

Spider Ecophysiology

by Wolfgang Nentwig

With over 43,000 species, spiders are the largest predacious arthropod group. They have developed key characteristics such as multi-purpose silk types, venoms consisting of hundreds of components, locomotion driven by muscles and hydraulic pressure, a highly evolved key-lock mechanism between the complex genital structures, and many more unique features. After 300 million years of evolutionary refinement, spiders are present in all land habitats and represent one of the most successful groups of terrestrial organisms. Ecophysiology combines functional and evolutionary aspects of morphology, physiology, biochemistry and molecular biology with ecology. Cutting-edge science in spiders focuses on the circulatory and respiratory system, locomotion and dispersal abilities, the immune system, endosymbionts and pathogens, chemical communication, gland secretions, venom components, silk structure, structure and perception of colours as well as nutritional requirements. Spiders are valuable indicator species in agroecosystems and for conservation biology. Modern transfer and application technologies research spiders and their products with respect to their value for biomimetics, material sciences, and the agrochemical and pharmaceutical industries.

Spider Homes (Rigby Sails #Red (Level 3-5))

by Ratu Mataira

Learn more about all the different places spiders can live.

Spider Silk: Evolution and 400 Million Years of Spinning, Waiting, Snagging, and Mating

by Leslie Brunetta Catherine L. Craig

Spiders, objects of eternal human fascination, are found in many places: on the ground, in the air, and even under water. Leslie Brunetta and Catherine Craig have teamed up to produce a substantive yet entertaining book for anyone who has ever wondered, as a spider rappelled out of reach on a line of silk, "How do they do that?" The orb web, that iconic wheel-shaped web most of us associate with spiders, contains at least four different silk proteins, each performing a different function and all meshing together to create a fly-catching machine that has amazed and inspired humans through the ages. Brunetta and Craig tell the intriguing story of how spiders evolved over 400 million years to add new silks and new uses for silk to their survival "toolkit" and, in the telling, take readers far beyond the orb. The authors describe the trials and triumphs of spiders as they use silk to negotiate an ever-changing environment, and they show how natural selection acts at the genetic level and as individuals struggle for survival.

Spider Webs: Behavior, Function, and Evolution

by William Eberhard

In this lavishly illustrated, first-ever book on how spider webs are built, function, and evolved, William Eberhard provides a comprehensive overview of spider functional morphology and behavior related to web building, and of the surprising physical agility and mental abilities of orb weavers. For instance, one spider spins more than three precisely spaced, morphologically complex spiral attachments per second for up to fifteen minutes at a time. Spiders even adjust the mechanical properties of their famously strong silken lines to different parts of their webs and different environments, and make dramatic modifications in orb designs to adapt to available spaces. This extensive adaptive flexibility, involving decisions influenced by up to sixteen different cues, is unexpected in such small, supposedly simple animals. As Eberhard reveals, the extraordinary diversity of webs includes ingenious solutions to gain access to prey in esoteric habitats, from blazing hot and shifting sand dunes (to capture ants) to the surfaces of tropical lakes (to capture water striders). Some webs are nets that are cast onto prey, while others form baskets into which the spider flicks prey. Some aerial webs are tramways used by spiders searching for chemical cues from their prey below, while others feature landing sites for flying insects and spiders where the spider then stalks its prey. In some webs, long trip lines are delicately sustained just above the ground by tiny rigid silk poles. Stemming from the author’s more than five decades observing spider webs, this book will be the definitive reference for years to come.

Spiders

by Gail Gibbons

This book talks about the different types of spiders there are sizes,colors poisonous or not and that there are over 30,000 types of spiders and most of them are harmless.

Spiders and Other Arachnids (World Book's Animals of the World)

by Steven Otfinoski

Questions and Answers about arachnids with a close up on the spider.

Spielwiese Internet: Sucht ohne Suchtmittel

by Kai Müller

Internetsucht ist eine moderne Form einer psychischen Problematik, die offensichtlich immer mehr Menschen etwas angeht, entweder direkt oder indirekt. Wie eine verschwommene Schimäre taucht dieses Schlagwort "Internetsucht" in den Medien auf. Zahlen von Betroffenen, Symptome und Auswirkungen dieses neuen Phänomens werden von unterschiedlichen Experten in unterschiedlicher Weise diskutiert und dennoch bleibt der Nicht-Fachmann nur allzu oft mit mehr Fragen als Antworten zurück. Dieses Buch soll dem Leser einen möglichst umfassenden Einblick vermitteln. Es vermittelt Antworten auf zentrale Fragen, wie z.B.: Was verbirgt sich hinter dem Begriff der Internetsucht? Wann ist ein Verhalten bereits Ausdruck einer Sucht? Welche Menschen sind als besonders gefährdet anzusehen? Welche Maßnahmen können ergriffen werden, um einer Internetsucht zu begegnen? Der aktuelle psychologische Kenntnisstand wurde hierzu nachvollziehbar aufbereitet und in einen engen praxisnahen Bezug gesetzt. Zielgruppen für dieses Werk sind alle, die sich über das Thema Spiel- und Internetsucht informieren möchten sowie alle, die selbst oder in ihrem familiären Umfeld oder Bekanntenkreis Menschen kennen, die davon betroffen sind. Nebenzielgruppe sind alle diejenigen, die im beruflichen Umfeld mit Betroffenen zu tun haben. Der Autor ist Diplompsychologe und arbeitet in der deutschlandweit einzigartigen Ambulanz für Spielsucht. Innerhalb seines beruflichen Umfeldes befasst er sich intensiv mit dem Thema der substanzungebundenen Abhängigkeitserkrankungen (Verhaltenssüchte), hier insbesondere mit der Internet- und Computerspielsucht sowie der Glücksspielsucht.

Spies and Shuttles: NASA's Secret Relationships with the DoD and CIA

by James E. David

Revealing the connections between NASA and the United States defense communityIn this real life spy saga, James E. David reveals the extensive and largely hidden interactions between NASA and U.S. defense and intelligence departments. The story begins with the establishment of NASA in 1958 and follows the agency through its growth, not only in scope but also in complexity.In Spies and Shuttles, David digs through newly declassified documents to ultimately reveal how NASA became a strange bedfellow to the Department of Defense (DoD) and the Central Intelligence Agency (CIA). He tracks NASA’s early cooperation—supplying cover stories for covert missions, analyzing the Soviet space program, providing weather and other scientific data from its satellites, and monitoring missile tests—that eventually devolved into NASA’s reliance on DoD for political and financial support for the Shuttle. David also examines the restrictions imposed on such activities as photographing the Earth from space and the intrusive review mechanisms to ensure compliance.The ties between NASA and the intelligence community have historically remained unexplored, and David’s riveting book is the first to investigate the twists and turns of this labyrinthine relationship.

Spies in Disguise: Gadgets, Gizmos, and Gear (Spies in Disguise)

by Centum Books Ltd

Spies in Disguise hits the big screen on December 25, 2019. The all-star cast includes Will Smith, Tom Holland, Karen Gillan, Rashida Jones, and DJ Khaled!Explore the tech world of Spies in Disguise in this action-packed storybook featuring unique gadgets and devices that only Walter could invent.Super spy Lance Sterling and scientist Walter Beckett are almost exact opposites. Lance is smooth, suave and debonair. Walter is... not. But what Walter lacks in social skills he makes up for in smarts and invention, creating the awesome gadgets Lance uses on his epic missions.But when events take an unexpected turn, Walter and Lance suddenly have to rely on each other in a whole new way. And if this odd couple can't learn to work as a team, the whole world is in peril.

Spike Timing: Mechanisms and Function

by Patricia M. DiLorenzo Jonathan D. Victor

Neuronal communication forms the basis for all behavior, from the smallest movement to our grandest thought processes. Among the many mechanisms that support these functions, spike timing is among the most powerful and-until recently-perhaps the least studied. In the last two decades, however, the study of spike timing has exploded. The heightened

Spillover and Feedback Effects in Low Carbon Development

by Youguo Zhang

This book studies the pathways and policies of regional coordinated low carbon development from the perspective of regional spillover-feedback effects. How do regional economies interact with carbon emission? This phenomena, also known as spillover-feedback effects, is explained in depth with reference to datasets and real examples. As China adopts zero-carbon emissions policies within the context of regional disparities, this theoretical construct is gaining utility, and in this book, climate science researchers and political scientists will find it explicated as never before.

Spillover: Animal Infections And The Next Human Pandemic

by David Quammen

"Science writing as detective story at its best." --Jennifer Ouellette, Scientific American A New York Times Notable Book of the Year, a Scientific American Best Book of the Year, and a Finalist for the National Book Critics Circle Award. Ebola, SARS, Hendra, AIDS, and countless other deadly viruses all have one thing in common: the bugs that transmit these diseases all originate in wild animals and pass to humans by a process called spillover. In this gripping account, David Quammen takes the reader along on this astonishing quest to learn how, where from, and why these diseases emerge and asks the terrifying question: What might the next big one be?

Refine Search

Showing 66,201 through 66,225 of 84,378 results