Résultats Éditeur "Tantor Media" dans Chimie

In both history and fiction, some of the most dramatic, notorious deaths have been through poisonings. Concealed and deliberate, it's a crime that requires advance planning and that for many centuries could go virtually undetected. And yet there is a fine line between healing and killing: The difference lies only in the dosage!

If you have an appetite for digestible science, you will find plenty of tasty morsels here. Discover why some people see red over red food dyes, why Sherlock Holmes was interested in jellyfish, why King George III was plagued with purple urine, and why phrenology is a pseudoscience.

In The Secrets of Alchemy, Lawrence M. Principe, one of the world's leading authorities on the subject, brings alchemy out of the shadows and restores it to its important place in human history and culture. By surveying what alchemy was and how it began, developed, and overlapped with a range of ideas and pursuits, Principe illuminates the practice. He vividly depicts the place of alchemy during its heyday in early modern Europe, and then explores how alchemy has fit into wider views of the cosmos and humanity.

For centuries, scientists believed that living matter possessed a special quality—a spirit or essence—that differentiated it from nonliving matter. But by the nineteenth century, the scientific consensus was that the building blocks of one were identical to the building blocks of the other. Elixir tells the story of two young chemists who were not convinced, and how their work rewrote the boundary between life and nonlife.

In this new collection of bite-size pop science essays, bestselling author, chemistry professor, and radio broadcaster Dr. Joe Schwarcz shows that you can find science virtually anywhere you look. And the closer you look, the more fascinating it becomes.

In this fascinating, refreshingly clarifying book about food, food myths, and how sloppy science perpetuates misconceptions about food, a medical doctor on his way to a conference gets drawn into conversations that answer many questions.

Of all the dietary and nutritional claims pitched to us, what can we believe? How does cinnamon affect your health? How splendid is Splenda? Should you buy farmed, wild, or canned food? What's fishy about fish-oil supplements? Will a diet of Twinkies and M&M's lead to weight loss? Water from a tap or from a plastic bottle - which should you choose, and which is better for the environment? Should you carry your groceries home in plastic or brown paper? We all have questions, and Dr. Joe Schwarcz has the answers, some of which will astonish you.

The complex ecosystem of the Amazon covers an area about the size of the continental US. Approximately one of every four flowering plant species on earth resides in the Amazon. A single Amazonian river may contain more fish species than all the rivers in Europe combined. The rain forest, which contains approximately 390 billion trees, plays a vital role in stabilizing the global climate by absorbing massive amounts of carbon dioxide - or releasing it into the atmosphere if the trees are destroyed.

Chemistry for Breakfast is a perfect book for anyone who wants to deepen their understanding of chemistry without having prior knowledge of the science. With Mai as your guide, you'll find something fascinating everywhere around you.

In The Elements We Live By, physicist and award-winning author Anja Røyne takes us on an astonishing journey through chemistry and physics, introducing the building blocks from which we humans - and the world - are made. Not only does Røyne explain why our bodies need iron, phosphorus, silicon, potassium, and many more elements in just the right amounts in order to function, she also leads us around the world to where these precious elements are found (some of them in ever-shrinking quantities).

Each day we are exposed to a myriad of natural and human-made chemicals in our food, drinking water, air, soil, at home or at the workplace-pesticide residues, food additives, drugs, household products-but how can we gauge the human health risk posed by these chemicals? Should we believe the somber headlines that depict a serious threat for humans and the environment, or should we follow the reassuring voices of others who claim that the angst is totally unfounded?

The charges of the proton and electron are opposite and equal, even though the proton is bigger. But why are they equal? This is one of the deepest unresolved puzzles of physics. Frank Close takes us on a journey into the quantum subatomic world of particles. He describes the strong and weak forces that operate alongside electromagnetism, the color and flavor charges, as well as the parallels between them, giving hints of a deeper unity.

The explosion of Internet commerce, coupled with globalization and increased pharmaceutical use, has led to an unprecedented vulnerability in the US drug supply. Today, an estimated 80 percent of our drugs are manufactured overseas, mostly in India and China. Every link along this supply chain offers an opportunity for counterfeiters, and increasingly, they are breaking in. Even when the US system works, consumers are increasingly circumventing the safeguards. Skyrocketing health care costs in the US have forced more Americans to become "medical tourists" seeking drugs, life-saving treatments, and transplants abroad, sometimes in countries with rampant counterfeit drug problems and no FDA. Bitter Pills will heighten the public's awareness about counterfeit drugs, critically examine possible solutions, and help people protect themselves.

The iconic periodic table of the elements is now in its most satisfyingly elegant form. This is because all the "gaps" corresponding to missing elements in the seventh row, or period, have recently been filled and the elements named. But where do these names come from? For some, usually the most recent, the origins are quite obvious, but in others - even well-known elements such as oxygen or nitrogen - the roots are less clear. Here, Peter Wothers explores the fascinating and often surprising stories behind how the chemical elements received their names.

The periodic table of elements, first encountered by many of us at school, provides an arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties, and divided into periodic trends. In this Very Short Introduction audiobook, Eric R. Scerri looks at the trends in properties of elements that led to the construction of the table and shows how the deeper meaning of the table's structure gradually became apparent with the development of atomic theory.