eBooks de Ciencias, página 18 de 1764

50 Biology Ideas You Really Need to Know is your guide to the most significant and stimulating questions in the study of life.Why do species evolve? Can characteristics be inherited without DNA? Are all organisms made of cells? What makes us human? This book provides succinct answers to all these questions, and many more, in 50 lucid and engaging essays that cover both classic experiments and the latest research.From the mysteries of sex and sleep, from mass extinction to immunity, 50 Biology Ideas You Really Need to Know will open your eyes to the fundamental processes that are vital to life on Earth, including how genes control the growth and behaviour of living things, how a body develops from a single cell, and how environmental forces create natural diversity through evolution. Featuring key concepts explained in simple terms, and with clear diagrams and timelines showing major scientific discoveries within their historical context, this book will give you a complete overview of a fascinating subject.Contents include: Evolution, Genes, Homeostasis, Endosymbiosis, Sex, Multicellularity, Nerves, Genetic Drift, Speciation, Convergent Evolution, Pollination, Mimicry, Laws of Inheritance, DNA, Alternative Splicing, Viruses, Epigenetics, Photosynthesis, Cancer, Differentiation, Regeneration, Morphogenesis, Memory, Sleep, Ageing, Consciousness and the Gaia Hypothesis.

50 Biology Ideas You Really Need to Know is your guide to the most significant and stimulating questions in the study of life.Why do species evolve? Can characteristics be inherited without DNA? Are all organisms made of cells? What makes us human? This book provides succinct answers to all these questions, and many more, in 50 lucid and engaging essays that cover both classic experiments and the latest research.From the mysteries of sex and sleep, from mass extinction to immunity, 50 Biology Ideas You Really Need to Know will open your eyes to the fundamental processes that are vital to life on Earth, including how genes control the growth and behaviour of living things, how a body develops from a single cell, and how environmental forces create natural diversity through evolution. Featuring key concepts explained in simple terms, and with clear diagrams and timelines showing major scientific discoveries within their historical context, this book will give you a complete overview of a fascinating subject.Contents include: Evolution, Genes, Homeostasis, Endosymbiosis, Sex, Multicellularity, Nerves, Genetic Drift, Speciation, Convergent Evolution, Pollination, Mimicry, Laws of Inheritance, DNA, Alternative Splicing, Viruses, Epigenetics, Photosynthesis, Cancer, Differentiation, Regeneration, Morphogenesis, Memory, Sleep, Ageing, Consciousness and the Gaia Hypothesis.

* ¿Cómo se adaptan, interactúan y evolucionan los organismos? ¿Por qué algunos sobreviven mientras otros mueren? ¿Y cuáles son las consecuencias? * Este libro le ofrece una introducción a la ciencia que estudia el mundo viviente y facilita la preservacion de sus especies, incluso la nuestra.* Una obra que traspasa la red de la vida, desde la evolucion hasta los biomas y las comunidades, para explicar como las especies interactuan entre si y con sus entornos. Descubra la diversidad y abundancia de seres vivos en la Tierra y algunos de sus comportamientos mas sorprendentes. Comprenda los patrones y procesos que vemos en la naturaleza y como podemos aprender a proteger lo que queda. Los resumenes concisos de solo 300 palabras, acompañados de una imagen, le proporcionan todos los recursos necesarios para entender mejor este tema clave.

Chemistry is at the cutting edge of our lives. How does a silicon chip work? How can we harness natural products to combat human disease? And is it possible to create artificial muscles? Providing answers to these questions and many more, 50 Chemistry Ideas You Really Need to Know is an engaging guide to the world of chemistry. From the molecules that kick-started life itself to nanotechnology, chemistry offers some fascinating insights into our origins, as well as continuing to revolutionize life as we know it. In 50 short instalments, this accessible book discusses everything from the arguments of the key thinkers to the latest research methods, using timelines to place each theory in context - telling you all you need to know about the most important ideas in chemistry, past and present. Contents include: Thermodynamics, Catalysts, Fermentation, Green Chemistry, Separation, Crystallography, Microfabrication, Computational Chemistry, Chemistry Occurring in Nature, Manmade Solutions: Beer, Plastic, Artificial Muscles and Hydrogen Future.

Chemistry is at the cutting edge of our lives. How does a silicon chip work? How can we harness natural products to combat human disease? And is it possible to create artificial muscles? Providing answers to these questions and many more, 50 Chemistry Ideas You Really Need to Know is an engaging guide to the world of chemistry. From the molecules that kick-started life itself to nanotechnology, chemistry offers some fascinating insights into our origins, as well as continuing to revolutionize life as we know it. In 50 short instalments, this accessible book discusses everything from the arguments of the key thinkers to the latest research methods, using timelines to place each theory in context - telling you all you need to know about the most important ideas in chemistry, past and present. Contents include: Thermodynamics, Catalysts, Fermentation, Green Chemistry, Separation, Crystallography, Microfabrication, Computational Chemistry, Chemistry Occurring in Nature, Manmade Solutions: Beer, Plastic, Artificial Muscles and Hydrogen Future.

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Conquer Anxiety in 50 Days: A Step-by-Step Guide to Inner Peace Are you tired of feeling overwhelmed by anxiety, stress, and constant worry? Do you long for mental clarity, emotional balance, and a sense of calm? The 50-Day Anxiety Conqueror s Manual is a powerful, practical guide designed to help you overcome anxiety step by stepone day at a time. What is the 50-Day Anxiety Conqueror s Manual? This manual offers a structured approach to managing and ultimately conquering anxiety through simple, actionable steps over 50 days. Each day provides an exercise, reflection, or technique that is easy to implement in your daily routine, helping you gradually retrain your mind to manage anxiety effectively. Key Features: Day-by-Day Guidance: Each day presents a unique, manageable activity that helps you build mental resilience, break free from worry, and reclaim your emotional well-being. Practical Techniques: Learn a variety of strategies such as breathing exercises, mindfulness practices, cognitive reframing, and positive self-talk to reduce anxiety levels. Progressive Learning: The manual is designed to guide you from simple exercises to more advanced techniques, making it easy to integrate the methods into your life and see real progress day after day. Holistic Approach: The program combines mental, emotional, and physical practices to help you tackle anxiety from every angle, fostering overall health and well-being. Why It Works: Builds Lasting Habits: Each days exercise is short and easy to incorporate into your routine, but together, they build habits that will last far beyond the 50-day mark. Addresses the Root Causes of Anxiety: By offering both immediate relief techniques and deeper insights into the psychology behind anxiety, this manual helps you get to the root of your stress, empowering you to manage and eventually eliminate it. Progressive, Positive Change: With consistent practice, the manual helps you shift your mindset and emotional responses, guiding you toward a life with more peace, less worry, and greater control over your thoughts and reactions. What You ll Achieve: A More Calm and Centered Mind: Through daily practices, you will learn to regulate your thoughts and emotions, fostering a deeper sense of inner calm. Increased Self-Confidence: As you experience positive shifts in your anxiety levels, you will build greater confidence in your ability to manage stress and anxiety. Stronger Coping Mechanisms: Youll gain practical tools to deal with everyday stress and anxiety, equipping you with the ability to face lifes challenges with resilience and balance. Is This Manual Right for You? If you struggle with anxiety, stress, or constant worrying, this manual is perfect for you. Whether you re looking for immediate relief or seeking long-term strategies to create a more peaceful life, the 50-Day Anxiety Conqueror s Manual offers the support, tools, and guidance you need to regain control over your mind and emotions. Start your journey to a calmer, more confident you today. Each day brings you closer to lasting peace of mindyour transformation starts now.

This latest book in the bestselling 50 Ideas series is a wonderfully accessible overview of the only place we know of in the universe that is capable of sustaining life. Expert popular science writer Martin Redfern covers all the natural processes of the Earth: climate, ocean currents, air currents, the elements, plate tectonics, fossils, the evolution of life, volcanology, sea levels and the ultimate fate of the Earth. The 50 Ideas featured include: Geological formation; Rock layers; Formation of the atmosphere; Plate tectonics; Continental rifts; Volcanology; Simple life; Multi-cellular life; Snowball Earth; Gondwana and Pangea; Sexual selection; Complex life; The Cambrian revolution; The dinosaurs; Avalonia; The sauropod puzzle; End of the Mesozoic; The Cenozoic recovery; The Great Warming; The Great Flood; The Holocene; Biodiversity and The fate of the Earth.

* ¿En qué punto nos encontraríamos si no existiesen la rueda o el vidrio? Imagine la vida sin el cemento o los ordenadores. * Piense durante un momento cómo mejoran nuestra salud y nuestro bienestar las vacunas y el marcapasos. * En este libro descubrira 50 inventos revolucionarios que han cambiado el mundo en campos como el de los materiales, la medicina, la ingenieria, la energia, los transportes o las pantallas tactiles, asi como a las personas responsables de esas ideas.Se repasa la historia del progreso humano a traves del trabajo de autenticos genios: desde el descubrimiento fortuito de la fabricacion de vidrio tras calentar arena hasta el "momento eureka" que nos permite iluminar el mundo con solo accionar un interruptor.Las entradas, breves y entretenidas, acompañadas de su imagen correspondiente, proporcionan la via mas rapida para entender los avances tecnologicos y sociales mas destacados.

Master the ideas that have shaped the study of genetics today.In a series of 50 accessible essays, Mark Henderson and Helen Sims introduce and explain the central ideas of genetics, beginning with the theory of evolution to the very latest, cutting-edge developments in gene therapy and artificial life.From the double helix and how nature and nurture work together, to genetic testing and race, 50 Genetics Ideas You Really Need to Know is a complete introduction to this young and ground-breaking strand of science.

In recent years knowledge of our genetic code has changed our understanding of life on Earth. New genetic technologies are transforming the way we live and promise treatments for otherwise incurable diseases. But these advances are also generating controversy, particularly surrounding issues such as cloning and designer babies. In 50 Genetics Ideas, Mark Henderson distils the central ideas of genetics in a series of clear and concise essays. Beginning with the theory of evolution, and covering such topics as the genome and how nature and nurture work together, he not only illuminates the role of genes in shaping our behaviour and sexuality, but also the very latest, cutting-edge developments in gene therapy and artificial life. Accessible and informative, 50 Genetics Ideas is a timely introduction to this young and ground-breaking strand of science.

Neuroscience is one of the most fascinating and complex areas of scientific research, with new advances being made every day. In 50 Human Brain Ideas You Really Need to Know, Mo Costandi condenses all we know about the brain and how it works into series of introductions to the most important concepts. Outlining both long-standing theories - such as the function of neurons and synaptic transmission - and cutting-edge ideas - including neuroethics and brain-computer interfacing - with straightforward narrative and clear two-colour illustrations, this book is a perfect beginners guide to the most powerful and mysterious organ in the body. The ideas explored include: The nervous impulse; Differences between the male and female brain; The root of addiction; Neurobiological basis for personality; The relationship between sleep and memory.

In a series of 50 accessible essays, Tony Crilly explains and introduces the mathematical laws and principles - ancient and modern, theoretical and practical, everyday and esoteric - that allow us to understand the world around us.From Pascals triangle to money management, ideas of relativity to the very real uses of imaginary numbers, 50 Maths Ideas is a complete introduction to the most important mathematical concepts in history.

¿Te han regalado una planta y no sabes cómo cuidarla? ¿Quieres alegrar tu casa y tu balcón con macetas y no sabes por qué todas acaban pochas? ¿Te acabas de comprar un ficus y no sabes en qué lugar ponerlo?Estas y muchas otras preguntas quedaran resueltas con esta guia de las plantas mas frecuentes en casa. Podras encontrar consejos sobre el momento de comprarlas, el tipo de maceta que necesitan, cuando regarlas y abonarlas o como combatir las enfermedades y plagas que suelen amenazarlas.Consigue que tus plantas sobrevivan felices.

* La ciencia de datos es un ecosistema artificial emergente que configura una nueva era de la información, y que permite desde localizar delincuentes hasta predecir epidemias. * Pero ¿sabe qué hay detras de esas ingentes cantidades de datos obtenidos por nuestros ordenadores, telefonos inteligentes y tarjetas de credito?* Este libro trata de los principios estadisticos elementales que rigen los algoritmos, del modo en que los datos nos afectan en todos los ambitos (ciencia, sociedad, negocios, placer), asi como de los dilemas eticos y su promesa futura de un mundo mejor.Cada entrada detalla en 30 segundos una faceta distinta de la ciencia de datos en solo 300 palabras y una imagen, y muestra como el concepto de reunir distintos tipos de datos y utilizar potentes programas informaticos para hallar patrones que ningun ojo humano es capaz de detectar transforma nuestro mundo. A traves de las ideas clave y de las biografias de quienes estan detras de ellas, en esta obra descubrira por que los datos no son tan solo el eje que determinan los grandes temas, tales como el cambio climatico y la asistencia sanitaria, sino tambien nuestra vida cotidiana.

Science first began as a branch of philosophy, but it has since grown up and moved out of the family home, and its successes have put its parent in the shade. Thanks to scientific knowledge we have walked on the Moon, cured once-fatal illnesses, and even identified the very building blocks of life and the universe. But it is these very successes that underline the need for philosophy. How much should we trust the pronouncements of scientists that we read in the media? What are the ethical implications of our delving into the foundations of our DNA, reproductive treatments, or artificially prolonging life? And are there limits to what science can tell us about the world we think we know? In straightforward and accessible terms, 50 Philosophy of Science Ideas You Really Need to Know explains the key philosophical questions that continue to lie at the heart of the nature and practice of science today. The ideas explored include: Appearance and reality; Knowledge; Anti-realism; Metaphysics; Science and gender; Phenomenology and science.

In a series of 50 accessible essays, Joanne Baker introduces and explains the fundamental physical concepts and laws that govern the inners workings of our universe.From Newtons law of gravitation to black holes, Schrodingers cat to chaos theory, 50 Physics Ideas You Really Need to Know is a complete introduction to the most important physics concepts in history.

"What would it take to create a world in which fantasy is not confused for fact and public policy is based on objective reality?" asks Neil deGrasse Tyson, science popularizer and author ofAstrophysics for People in a Hurry."I dont know for sure. Buta good place to start would be for everyone on earth to read this book." Maybe you know someone who swears by the reliability of psychics or who is in regular contact with angels. Or perhaps youre trying to find a nice way of dissuading someone from wasting money on a homeopathy cure. Or you met someone at a party who insisted the Holocaust never happened or that no one ever walked on the moon. How do you find a gently persuasive way of steering people away from unfounded beliefs, bogus cures, conspiracy theories, and the like? This down-to-earth, entertaining exploration of commonly held extraordinary claims will help you set the record straight. The author, a veteran journalist, has not only surveyed a vast body of literature, but has also interviewed leading scientists, explored "the most haunted house in America," frolicked in the inviting waters of the Bermuda Triangle, and even talked to a "contrite Roswell alien." He is not out simply to debunk unfounded beliefs. Wherever possible, he presents alternative scientific explanations, which in most cases are even more fascinating than the wildest speculation. For example, stories about UFOs and alien abductions lack good evidence, but science gives us plenty of reasons to keep exploring outer space for evidence that life exists elsewhere in the vast universe. The proof for Bigfoot or the Loch Ness Monster may be nonexistent, but scientists are regularly discovering new species, some of which are truly stranger than fiction. Stressing the excitement of scientific discovery and the legitimate mysteries and wonder inherent in reality, this book invites readers to share the joys of rational thinking and the skeptical approach to evaluating our extraordinary world.

El herpes zóster (HZ) es una enfermedad que acompaña desde antiguo a la humanidad, si bien es cierto que los clásicos no diferenciaban entre herpes zóster y otras enfermedades eruptivas de la piel en sus escritos. No fue hasta finales del s. XVIII cuando se establecio una forma de diferenciar el herpes zoster de la viruela, y a finales del siglo XIX se distinguio de la erisipela.El HZ esta causado por el virus herpes tipo 3 o virus varicela-zoster (VVZ), uno de los ocho virus conocidos de la familia Herpesviridae. Tiene distribucion mundial y la susceptibilidad es universal. El unico reservorio es el ser humano, y la transmision se produce de persona a persona por contacto directo a traves de la piel, por via respiratoria o por via conjuntiva.Se produce por la reactivacion endogena del VVZ. Es decir, para desarrollar un HZ, es preciso haber sufrido una primoinfeccion, generalmente en la infancia, que aparecera en forma de varicela (clinica o subclinica). Una vez superada la primoinfeccion, el VVZ queda acantonado en los ganglios sensitivos hasta su eventual reactivacion.

Ready for new 10 new practical ideas for creating your backyard homestead? 50 Projects for Building Your Backyard Homestead: A Hands-On, Step-By-Step Sustainable-Living Guide updates one of the most popular books on the subject with the addition of 10 new projects to help your homestead thrive. Inside, experienced homesteader and contractor, David Toht, will teach you backyard homestead project ideas like accessible garden paths, insulated chicken coops, and backyard essentials from fences to feeders. Are you a beginner? Dont worry; youll learn how to handle simple builds like raised gardens. Getting a little more advanced as a homesteader? Learn how to build a drought-resistant landscape or build passive ventilation systems to keep your chickens comfortable. Gardens, gates, PVC, pens, aquaponics, hydroponics, wind turbines, solar panels, roofing--its all here. No matter what your homestead looks like, youll come away from 50 Projects for Building Your Backyard Homestead, Updated Edition with encyclopedic knowledge and inspiration for what project to tackle next. This is an all-encompassing, comprehensive guide for those looking to expand their current homestead or embark on a more self-sustaining lifestyle.