Химия и химическая промышленность
  • формат djvu
  • размер 1.16 МБ
  • добавлен 06 мая 2011 г.
Asimov I. The World of Nitrogen
Abelard-Schuman. 1958. 159 p.

The substances that go to make up your body are quite different in several ways from those that go to make up a rock. The chemical compounds in you and in all living things, are, for the most part, fragile. If they are heated or subjected to sunlight or various chemicals for even a short time, they are often changed into forms no longer useful to the body, Rocks and metal, water and salt, air and glass can easily resist a harsh environment of a kind that would ruin our body chemicals. Chemists, about a hundred and fifty years ago, consequently began to divide all chemical substances into 2 groups : organic compounds (those which occurred in living tissue) and inorganic compounds (those which occurred in non-living air, sea and soil. It was noticed that, in most cases, substances in living tissue contained carbon atoms in their make-up, while inorganic substances did not. For that reason, organic chemistry is now considered to be the chemistry of those compounds which contain carbon, whether a particular compound occurs in a living tissue or not. (If you have ever seen coal, you have seen carbon. Coal is made up almost entirely of carbon atoms. )
I wanted to write a book about organic chemistry; a book describing the important carbon-containing compounds. Consequently, I wrote "The World of Carbon". The only trouble was that by the time i had finished the book, I had only had a chance to describe about half of the compounds that needed describing.
You may wonder why this should be when the book was conceed with the compounds involving primarily, only one kind of atom. After all, there are 102 kinds of atoms altogether and I had earlier written a book about all of them (entitled Building Blocks of the Universe), even including a bit about carbon, and I managed to get all that into one volume. Why, then, the trouble here?
The fact of the matter is, you see, that there is more to the carbon atom than there is to all the other atoms put together. It's that very fact that makes life, as we know it, possible.
Похожие разделы
Смотрите также

Asimov I. The World of Carbon

  • формат djvu
  • размер 1.56 МБ
  • добавлен 06 мая 2011 г.
Abelard-Schuman. 1958. 175 p. Chemists divide all substances into two classes. In one class are such things as olive oil, sugar, starch, glue, gelatin, silk, rubber, paper, and penicillin. These are examples of organic substances. In the other class are such things as air, water, sand, clay, salt, gold, silver, iron, brass, glass, and concrete. These are examples of inorganic substances. The distinction between the two emerged when it became evi...

Ford L.A. Chemical Magic

  • формат pdf
  • размер 7.75 МБ
  • добавлен 25 февраля 2011 г.
T.S.Denison&Co. , Inc. 1959. 73 p. Preface Introduction Mysteru Demonstrations Be Careful Motion, Sound and Color The Stage Visibility Magic Patter Black Foam Magic Stars Bloody Picture Bubbling Co,umns Blowing Through Glass Boiling Water in Paper Blue Flare Purple Smoke Burning Sugar Lump Candle Tricks Chemical Cannon Chemical Garden Burning Water Gold Breath Violet Vapors Cold Fire Cold Light Crystal Growth Crystal Moss Disappering Beaker G...

Ghosh A. (ed.) Letters to a Young Chemist

  • формат pdf
  • размер 2.91 МБ
  • добавлен 16 октября 2011 г.
Wiley. 2011. 320 p. What’s it really like to be a chemist? Leading chemists share what they do, how they do it, and why they love it. Letters to a young … has been a much-loved way for professionals in a field to convey their enthusiasm and the realities of what they do to the next generation. Now, Letters to a Young Chemist does the same for the chemical sciences. Written with a humorous touch by some of today’s leading chemists, this book pr...

Nicolaou K.C., Montagnon T. Molecules, That Changed the World

  • формат pdf
  • размер 63.35 МБ
  • добавлен 31 августа 2011 г.
Wiley-VCH. 2008. 368 p. In this delightfully designed book, K. C. Nicolaou introduces the world's most important molecules and shows in a fascinating way the role certain compounds have to play in our everyday lives in the fields of drugs, aromatics or vitamins. For example, he tells the story of Aspirin, beginning 3,500 years ago in Egypt, through to its first synthesis and various applications with many entertaining facts and details. Printed...

Ochiai E. Chemicals for Life and Living

  • формат pdf
  • размер 6.4 МБ
  • добавлен 02 июля 2011 г.
Springer. 2011. 307 p. Chemicals often have a negative Image among the general public. But there is no material world or indeed human beings without chemicals. The material world is operated by chemicals. The title ‘Chemicals for Life and Living’ implies that the material world is staged and played by chemicals. The book consists of five parts and an appendix. Part 1 – Essentials for life; Part 2 – Enhancing health; Part 3 – For the fun of life;...

Zaikowski L., Frierich J.M. (eds.) Chemical Evolution across Space & Time. From the Big Bang to Prebiotic Chemistry

  • формат pdf
  • размер 34.49 МБ
  • добавлен 09 августа 2011 г.
ACS. 2008. 463 p. The concept of evolutionary change is a fundamental thread linking the sciences. An evolutionary perspective can provide one framework for unifying and advancing the sciences, and chemistry has made important contributions to our understanding of evolution. Chemists today use principles of evolution and take lessons from chemistry in nature to advance modern chemistry in areas such as agriculture, energy, new materials, and pha...