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Prion-related diseases, known as transmissible spongiform encephalopathies (TSEs), are infectious, fatal neurodegenerative disorders for which there is no cure, treatment, nor even a means for early diagnosis. The horrific advent of Mad Cow Disease -- transmitted to humans through eating meat from steers sickened by bovine spongiform encephalopathy --brought prion-related diseases international attention. Exceptionally dramatic, these diseases progressively and inexorably destroy the cognitive, motor, and sensorial skills that are the essence of human beings. Prions: The New Biology of Proteins provides a well-organized overview of what is known about prion-related diseases. This comprehensive work reviews the symptoms, epidemiology, and neuropathology of the disease. It focuses on evidence supporting the idea that TSEs result from a novel disease mechanism: transmission by replication of the misfolding of a single protein in the absence of nucleic acids. Following this hypothesis, the book examines the structure, conversion, and mechanism of prion propagation and details its cellular biology. It explores the transmission, discusses the challenges involved with diagnosis, and considers various therapeutic avenues that are presently being explored. A cohesive volume that integrates the pioneering work of many researchers, this book is authored by Claudio Soto, an internationally renowned researcher whose innovative work has led to an increased understanding of the heretical biology of prions and the development of novel strategies for treating and diagnosing neurodegenerative diseases. As protein misfolding diseases are his specialty, Soto also looks at the phenomenon from a wider perspective. He examines other diseases that display folding aberrations, considers how commonly such aberrations occur in nature, and asks readers to open their minds to consider the impact of prions on broader areas of biology, public health, and biotechnological
The current interest in prion diseases has been fueled by the panic that originated from the appearance of a new variant of Creutzfeldt-Jakob disease and the evidence linking it to human exposure to the bovine spongiform encephalopathy (BSE) agent. Peer-reviewed to assure accuracy, this book describes the science, concepts, hypothesis, and mechanisms of prion disease transmission. It covers human and animal prion diseases, their incidence, prevalence, origin, and clinical and neuropathologic characteristics. The author provides scientific facts and a clear explanation of the relevance and implications of the findings for science in general.
Este texto aborda la aplicacion de la Programacion Lineal y sus derivados como metodos para formular raciones al minimo costo para ganado de carne a pastoreo, haciendose especial enfasis en la construccion de los modelos e interpretacion economica de los resultados. Ademas se describen las caracteristicas nutricionales que deberian tener los diferentes tipos de suplementos (energeticos, proteicos, sales minerales, bloques multi-nutricionales, etc.) y bajo que situaciones estaria indicado su empleo en la alimentacion del ganado, presentandose ejemplos reales de formulacion de los diferentes tipos de suplementos. Por ultimo se presentan metodos y modelos avanzados donde se describen las aplicaciones de la Programacion Binaria, Programacion por Metas, Programacion Difusa, Programacion Estocastica, etc. aplicadas especificamente a la formulacion de raciones. Este texto va dirigido a docentes, profesionales y estudiantes universitarios relacionados al contexto agropecuario.
Este texto aborda los aspectos teoricos y practicos de la suplementacion con Proteina Degradable y No Degradable en rumen en ganado de carne a pastoreo, brindandole al lector una clara vision de cuando es conveniente suplementar con proteina. Ademas se describe como hacer un uso eficiente de los compuestos de nitrogeno no proteico, discutiendo posibles ventajas y desventajas sobre el uso de la urea y de los principales compuestos de liberacion lenta en rumen de reciente aparicion en el mercado basados en la teoria de la Sincronia de Nutrientes. Se brinda una descripcion de las caracteristicas nutricionales de los principales suplementos proteicos (harinas, sales proteinadas, bloques, melaza fortificada con urea, pastoreo por hora sobre pasturas de alta calidad, etc.), finalmente se describen algunos aspectos practicos que pueden afectar la respuesta a la suplementacion (espacio y distribucion de las bateas, suministro del suplemento en el campo, horario de suplementacion, regulacion del consumo con sal, etc.). Este texto constituye una actualizacion sobre los ultimos avances de la suplementacion proteica en ganado de carne a pastoreo y va dirigido a profesionales y estudiantes de carreras universitarias relacionadas al contexto agropecuario.
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