Ebooks de ciencias, página 29 de 726

Adulteration refers to the practice of altering food or pharmaceutical content to reduce production costs. Factors affecting this practice include market forces such as easy availability of food adulterants, bargaining power of consumers and large demand and supply gaps which incentivize such practices. Technological advancements in chemical analysis now help us to identify adulterated food and drugs more easily. Adulteration Analysis of Some Foods and Drugs is a sourcebook describing analytical methodologies for the determination of adulterants in different food items (milk, honey, juice) and drugs (dietary supplements, sildenafil and specific plant extracts). Additional chapters give guidelines for analyzing a food or drug sample. This book is suitable for researchers working in the field of analytical chemistry for the determination of adulterants. The concise and organized presentation of the contents also serves to enhance the level of knowledge of students undertaking food and drug safety / quality control training courses.

Researchers, politicians and lay persons around the world agree that renewable energy technologies will play an increasingly important role in strengthening national economies in the future. The renewable energy industry has the potential to significantly increase power capacity of several countries and subsequently create many jobs. This book examines recent advances in specific renewable energy systems. Readers will learn about theoretical and applied perspectives which are key to addressing the major issues associated with such systems. Chapters cover solar energy systems, thermal energy storage, bioenergy, hydrogen production, geothermal energy and measurement techniques for these energy systems. Students in engineering programs, and engineers working in academia and the renewable energy sector will be able to broaden their understanding of complex renewable energy projects through the comprehensive overview of both the fundamental concepts and the technical issues covered in the text.

Todays academic environment presents assessment challenges defined by an increased volume of available information coupled with increased competition among students and time constraints. Multiple choice questions (MCQs) provide examiners with an opportunity to assess academic performance on the basis of instant recollection of correct answers in a minimal amount of time. MCQs Series for Life Sciences Volume 2 is a collection of MCQs on advanced topics and offers the following benefits for readers:Includes over 950 relevant MCQs Covers two major topics: cell culture and microbiology.Simplified language and presentation of conceptsAnswers to each question are providedThis MCQ book series in life sciences is a handy reference for graduate and postgraduate students undertaking examinations or entrance tests as well as teachers or examiners involved in setting and controlling assessments in specific subjects in life sciences. The second volume augments the first volume which comprehensively covers five areas of life sciences: immunology, biochemistry, cell biology developmental biology, genetics and molecular biology.

Bioinformatics allows researchers to answer biological questions with advanced computational methods which involves the application of statistics and mathematical modeling. Structural bioinformatics enables the prediction and analysis of 3D structures of macromolecules while Computer Aided Drug Designing (CADD) assists scientists to design effective active molecules against diseases. However, the concepts in structural bioinformatics and CADD can be complex to understand for students and educated laymen. This quick guideline is intended as a basic manual for beginner students and instructors involved in bioinformatics and computational chemistry courses. Readers will learn the basics of structural bioinformatics, primary and secondary analysis and prediction, structural visualization, structural analysis and molecular docking. Therefore, the book is a useful handbook for aspiring scholars who wish to learn the basic concepts in computational analysis of biomolecules.

Este libro será útil a aquellos alumnos que empiezan a estudiar Química y tienen dificultades al analizar los problemas y encontrar soluciones lógicas o que tienen dificultades con las representaciones graficas y su interpretacion o simplemente que han olvidado temas tales como los logaritmos o las operaciones matematicas basicas. Tambien sera de utilidad para aquel estudiante que busque problemas y explicaciones adicionales con el fin de alcanzar una mejor comprension de los conceptos y preparar sus examenes.

Los métodos estadísticos son una parte fundamental de la ciencia de datos, pero pocos científicos de datos tienen una formación avanzada en estadística. Los cursos y libros sobre estadística básica rara vez tratan el tema desde la perspectiva de la ciencia de datos. La segunda edicion de este libro incluye ejemplos detallados de Python, ofrece una orientacion practica sobre la aplicacion de los metodos estadisticos a la ciencia de datos, te indica como evitar su uso incorrecto y te aconseja sobre lo que es y lo que no es importante.Muchos recursos de la ciencia de datos incorporan metodos estadisticos, pero carecen de una perspectiva estadistica mas profunda. Si estas familiarizado con los lenguajes de programacion R o Python y tienes algun conocimiento de estadistica, este libro suple esas carencias de una forma practica, accesible y clara.Con este libro aprenderas:Por que el analisis exploratorio de datos es un paso preliminar clave en la ciencia de datosComo el muestreo aleatorio puede reducir el sesgo y ofrecer un conjunto de datos de mayor calidad, incluso con Big DataComo los principios del diseño experimental ofrecen respuestas definitivas a preguntasComo utilizar la regresion para estimar resultados y detectar anomaliasTecnicas de clasificacion esenciales para predecir a que categorias pertenece un registroMetodos estadisticos de aprendizaje automatico que "aprenden" a partir de los datosMetodos de aprendizaje no supervisados para extraer significado de datos sin etiquetarPeter Bruce es el fundador del Institute for Statistics Education en Statistics.com.Andrew Bruce es cientifico investigador jefe en Amazon y tiene mas de 30 años de experiencia en estadistica y ciencia de datos.Peter Gedeck es cientifico de datos senior en Collaborative Drug Discovery, desarrolla algoritmos de aprendizaje automatico para pronosticar propiedades de posibles futuros farmacos.

Focado no novo emprego, resolvi adaptar a forma de cobrança de dívidas da empresa, o foco é criar um ambiente de interação para que cobrador e devedor tenham satisfação em solucionar a dívida. O pass

O livro apresenta uma pesquisa interdisciplinar que investiga as práticas educacionais e ambientais em comunidades rurais da Amazônia. Com abordagem holística, o estudo oferece insights valiosos na p

A remarkable fact in mathematics is the accordance between algebra and geometry: since the time of Descartes it is possible to express geometric phenomena in terms of numbers. And after doing calculations with these numbers, we can draw geometric conclusions from them. However, soon it appeared that, for instance, a circle and a line outside that circle have imaginary meeting points: points that have imaginary coordinates but can not be found in the figure. Karl von Staudt found a brilliant way to visualize imaginary geometric points, lines and planes, and Felix Klein simplified and extended his method. In this book imaginary elements appear as Klein-movements in our real space. Apart from its mathematical importance, these movements may be seen as an alternative for the remarkable occurrences of complex numbers in physics, viz. quantum physics.

Existem convicções seguras da origem do mundo por Deus, que o Cosmo é infinito, ou de expansão infindável em matéria e energia, possui ambas em quantidade sem fim, ou, com certeza evolui e chegará ne

Este libro intenta servir de introducción en este nuevo campo a estudiantes de niveles avanzados y a graduados. Pretende ser útil al químico inorgánico que quiera orientar su investigación por este campo, asi como a los bioquimicos interesados en un resumen del trabajo existente. El libro se divide en dos partes. En la Parte 1 se da una vision de conjunto del material fundamental importante y se introduce por lo general al lector en las cuestiones del tema de la obra. La Parte 2 es la fundamental del libro y trata de la mayor parte de los elementos inorganicos de importancia.

This book will take you on a whirlwind tour of full-stack web application development using Raspberry Pi. You will learn how to build an application from the ground up.You will gain experience and know-how of technologies including:- The Linux operating system and command line.- The Python programming language.- The Raspberry Pi General Purpose Input Output pins (GPIOs).- The Nginx web server.- Flask Python web application microframework.- JQuery and CSS for creating user interfaces.- Dealing with time zones.- Creating charts with Plotly and Google Charts.- Data logging with Google Sheet.- Developing applets with IFTTT.- Securing your application with SSL.- Receiving SMS notifications to your phone using Twilio.This book will also teach you how to set up a remote wireless Arduino sensor node and collect data from it. Your Raspberry Pi web application will be able to process Arduino node data in the same way it processes data from its onboard sensor.Raspberry Pi Full Stack will teach you many skills essential to building Web and Internet of Things applications.The application you will build in this project is a platform that you can extend upon. This is just the start of what you can do with a Raspberry Pi and the software and hardware components that you will learn about.This book is supported by the author via a dedicated discussion space.

Ever since the Raspberry Pi was introduced, it has been used by enthusiasts to automate their homes. The Raspberry Pi is a powerful computer in a small package, with lots of interfacing options to control various devices. This book shows you how you can automate your home with a Raspberry Pi. Youll learn how to use various wireless protocols for home automation, such as Bluetooth, 433.92 MHz radio waves, Z-Wave, and Zigbee. Soon youll automate your home with Python, Node-RED, and Home Assistant, and youll even be able to speak to your home automation system. All this is done securely, with a modular system, completely open-source, without relying on third-party services. Youre in control of your home, and no one else.At the end of this book, you can install and configure your Raspberry Pi as a highly flexible home automation gateway for protocols of your choice, and link various services with MQTT to make it your own system. This DIY (do it yourself) approach is a bit more laborious than just installing an off-the-shelf home automation system, but in the process, you can learn a lot, and in the end, you know exactly whats running your house and how to tweak it. This is why you were interested in the Raspberry Pi in the first place, right?- Turn your Raspberry Pi into a reliable gateway for various home automation protocols. - Make your home automation setup reproducible with Docker Compose. Secure all your network communication with TLS.- Create a video surveillance system for your home.- Automate your home with Python, Node-RED, Home Assistant and AppDaemon.- Securely access your home automation dashboard from remote locations.- Use fully offline voice commands in your own language.

The Internet of Things (IoT) is becoming a major application area for embedded systems. As a result, more and more people are becoming interested in learning about embedded design and programming. Technical colleges and universities are moving away from legacy 8 and 16-bit microcontrollers and are introducing 32-bit embedded microcontrollers to their curriculums. Many IoT applications demand precision, high processing power, and low power consumption.Produced by IBM, Node-RED is an open-source visual editor for wiring the Internet of Things. Node-RED comes with a large number of nodes to handle a multitude of tasks. The required nodes are selected and joined together to perform a particular task. Node-RED is based on flow type programming where nodes are configured and joined together to form an application program. There are nodes for performing complex tasks, including web access, Twitter, E-mail, HTTP, Bluetooth, MQTT, controlling GPIO ports, etc. One particularly nice aspect of Node-RED is that the programmer does not need to learn how to write complex programs. For example, an email can be sent by simply joining nodes together and writing only a few lines of code.The aim of this book is to teach how Node-RED can be used in projects. The main hardware platform used with most of the projects in this book is Raspberry Pi 4. Chapters are included to show how Node-RED can be also be used with Arduino Uno, ESP32 DevKitC, and the ESP8266 NodeMCU microcontroller development boards.

Este es un texto que contiene una exposición axiomática de la teoría general de espacios vectoriales topológicos y trata con profundidad algunos aspectos de la teoría y, asimismo, muestra varios ejemplos interesantes de aplicacion a otras ramas de la Matematica.

This book captures the excitement of a formative phase of UK science during and immediately following WWII. It links back to scientists working at Antarctic whaling stations and the complimentary voyages of Captain Scotts Discovery that explored the vast icy Southern Ocean, funded by a tax on whale oil. In the depths of WWII a small group of young scientists were brought together under the inspirational leadership of Dr (later Sir) George Deacon, and shortly after the end of the war, the UKis first National Institute of Oceanography was formed. The discoveries from 50 years ago underpin our modern-day science. The bookis chapters are all written and edited by NIO scientists and convey the atmosphere of work at sea in a bygone age before small computers,satellite navigation and easy communication. The book is A useful introduction for students of marine and/or environmental science. It will appeal to many scientists and the general public , to those interested in science and innovation during and after WWII and of course to many living in the Surrey who always wondered what went on in the leafy lanes that were home to NIO and its successors for almost 50 years.

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.

Este libro está dirigido a los estudiantes que se inician en el Cálculo Diferencial e Integral, tanto a aquéllos que necesitan sobre todo un aprendizaje práctico (Escuelas Técnicas y Ciencias Aplicadas), como a los que requieren un conocimiento mas teorico y profundo. Su contenido abarca todos los temas basicos del Analisis Matematico: sistemas numericos, funciones elementales, sucesiones y series numericas, limites y continuidad de funciones, sucesiones y series funcionales, derivacion, integracion de Riemann (propia e impropia).

Texto ideado para un curso preuniversitario con una visión general de la Química y que está exento de las limitaciones que imponen las barreras de sus ramas principales como son la Química física, inorganica, organica y analitica, si bien es una adecuada introduccion al estudio de las mismas.

El objetivo de la presente obra es exponer una visión global sobre las características y la utilización de los abonos, así como numerosas recomendaciones para el abonado de los cultivos. Se ha planteado dentro de un amplio marco, que incluye muchos aspectos marginales, de los productos cosechados. Las cuestiones mas importantes y problematicas se tratan cientificamente, pero tambien se resumen de forma simplificada, cuando ello es posible y necesario.