Showing 73–96 of 302 results
Authors: Würl, MatthiasPublication in the field of natural sciencesMatthias Würl presents two essential steps to implement offline PET monitoring of proton dose delivery at a clinical facility, namely the setting up of an accurate Monte Carlo model of the clinical beamline and the experimental validation of positron emitter production cross-sections. In the first part, the field size dependence of the dose output is described for scanned proton beams. Both the Monte Carlo and an analytical computational beam model were able to accurately predict target dose, while the latter tends to overestimate dose in normal tissue.
While there has been increasing interest in recent years in the welfare of farm animals, fish are frequently thought to be different. In many people’s perception, fish, with their lack of facial expressions or recognisable communication, are not seen to count when it comes to welfare. Angling is a major sport, and fishing a big industry. Millions of fish are caught on barbed hooks, or left to die by suffocation on the decks of fishing boats. Here, biologist Victoria Braithwaite explores the question of fish pain and fish suffering, explaining what we now understand about fish behaviour, and examining the related ethical questions about how we should treat these animals.
The billfish is fixed at the apex of the oceanic food chain. Composed of sailfish, marlin, spearfish, and swordfish, they roam the pelagic waters of the Atlantic and are easily recognized by their long, spear-like beaks. Noted for their speed, size, and acrobatic jumps, billfish have for centuries inspired a broad spectrum of society. Even in antiquity, Aristotle, who assiduously studied the swordfish, named this gladiator of the sea xiphias—the sword.The Billfish Story tells the saga of this unique group of fish and those who have formed bonds with them—relationships forged by anglers, biologists, charter-boat captains, and conservationists through their pursuit, study, and protection of these species.
This volume provides a comprehensive collection of classical and cutting edge protocols and techniques to examine the normal development and physiological functions of the gastrointestinal system and to model the most common digestive diseases. The chapters focus on diverse research topics including ex vivo systems to study gastrointestinal development and functions, in vivo imaging of the gastrointestinal tract, isolation and characterization of intestinal immune cells, and animal models of gastrointestinal inflammation and cancer.
The Tenth Edition of the best-selling text Campbell BIOLOGY helps launch you to success in biology through its clear and engaging narrative, superior pedagogy, and innovative use of art and photos to promote student learning.
The Tenth Edition helps you develop a deeper understanding of biology by making connections visually across chapters and building the scientific skills needed for success in upper-level courses.
New Make Connections Figures pull together content from different chapters visually, helping you see “big picture” relationships.
New Scientific Skills Exercises in every chapter use real data to build key skills needed for biology, including data analysis, graphing, experimental design, and math skills.
New examples show you how our ability to sequence DNA and proteins rapidly and inexpensively is transforming every subfield of biology.
Most major recent advances in understanding the history of life on Earth have been through the study of exceptionally well preserved biotas (Fossil-Lagerstätten). These are windows on the history of life on Earth and can provide a fairly complete picture of the evolution of ecosystems through time. This book follows the success of Evolution of Fossil Ecosystems by the same authors which covered Fossil-Lagerstätten around the world. The success of the first book prompted this new book which draws on four localities from the original book and adds another ten, all located in North America.
Following an introduction to Fossil-Lagerstätten, each chapter deals with a single fossil locality. Each chapter contains a brief introduction placing the Lagerstätte in an evolutionary context; there then follows a history of study of the locality; the background sedimentology, stratigraphy and palaeoenvironment; a description of the biota; discussion of the palaeoecology, and a comparison with other Lagerstätten of a similar age and/or environment. At the end of the book is an Appendix listing museums in which to see exhibitions of fossils from each locality and suggestions for visiting the sites.
Authors: Nikulin, Mikhail, Wu, Hong-Dar IsaacOffers a short-course or one-semester material for students, biostatisticians, and for scientific researchers who demand applications of survival analysis Illustrated with real life examplesDemonstrates the application of the statistical methods to several datasetsThis book will be of interest to readers active in the fields of survival analysis, genetics, ecology, biology, demography, reliability and quality control.Since Sir David Cox’s pioneering work in 1972, the proportional hazards model has become the most important model in survival analysis.
Across the continental United States, one can identify 20 distinct forest cover types. Most of these are to be found on federal lands managed by the U.S. Forest Service and Bureau of Land Management. Those responsible for the management of trees that form the 20 different cover types and the diversity of forest wildlife that reside in them must have a solid grounding in concepts of forest management, especially silviculture, as well as concepts of wildlife management, in order to integrate both as part of any effective natural resource management plan.
Forest Wildlife Ecology and Habitat Management provides both foresters and wildlife biologists responsible for managing forest resources with an integrated understanding of the relationship between forests and wildlife. Based on David Patton’s 50 years of experience as a forester and wildlife biologist, the book shows readers how to look at forests as ecological systems and wildlife as part of the energy flow and nutrient cycling process within those systems. He offers readers a fundamental understanding of the natural processes that occur in a forest taking into consideration vegetation, water, and the natural effects of climate and time. He then provides a biological perspective on wildlife, discussing reproduction, behavior, feeding habits, and mobility. He also discusses the various influences on forests and wildlife by both natural and human-caused events.
Covering those forest types included in the U.S. National Atlas, and associating over 1,100 wildlife species with 20 major forest types in 48 states, Professor Patton provides recommendations for ways to restore and maintain wildlife habitat by direct and indirect coordination. Towards this end, the author —
Is Genesis true history or just a Hebrew myth? If Genesis is false the entire Bible falls apart, Jesus was a false profit and Christianity is the greatest deception perpetrated on mankind. The author dares to take the reader down a modern scientific path within the Book of Genesis to discover an ancient truth: Hebrew texts, written thousands of years before mankind discovered the laws of natural science, actually contain the blueprint for science and for life. This book is for those who care to know how the Scriptures and science agree, who hunger to know God and His personal plan for them, both in this world, and the world to come.
Interest in the role of extracellular vesicles (microvesicles and exosomes) is expanding rapidly. It is now apparent that far from being merely cellular debris, these vesicles play a key role in cell-to-cell communication and signaling. Moreover, they are significantly elevated in a number of diseases. This raises the question of their direct role in pathogenesis as well as their possible use as biomarkers.This book stems from the first international meeting on "Microvesicles and Nanovesicles in Health and Disease" held at Magdalen College, Oxford, in 2010.
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