A scientist at the seashore by James Trefil PDF

By James Trefil

ISBN-10: 048644564X

ISBN-13: 9780486445649

''A really good expedition from the seashore to the ends of the sun procedure . . . captivating.''—The big apple Times
''So effortless to appreciate but so dense with wisdom that you're going to by no means examine waves on a seashore an identical manner again.''—San Francisco Chronicle
''One of the easiest renowned technological know-how books.''—The Kansas urban Star
''Perfect for the weekend scientist.''—The Richmond News-Leader
A famous physicist and renowned technological know-how author heads for the seashore to reply to universal and unusual questions about the sea. James S. Trefil, writer of Dover guides' The second of construction: enormous Bang Physics from earlier than the 1st Millisecond to the current Universe, explains why the ocean is salty, how bubbles shape at the water's floor, the place waves come from, and different curiosities of the marine international. Dr. Trefil attracts upon his designated present for clarifying complicated medical ideas and the theories in the back of them to offer a story that's transparent, available, and totally compelling.

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18 (a) Sugars The most common sugar used in catering is sucrose. Like all the other sugars, sucrose is sweet to taste, is a white crystalline solid, and dissolves in water. 2. g .. in bread dough As an important structural ingredient As a substrate The cooking of sugar can be looked at in two ways: (i) Dry heat If sugar is heated in little or no liquid, caramelisation occurs. In this process the sugar molecules, on heating, begin to break down, and the smaller molecules produced join together in a complex set of reactions to form a chain or polymer.

Other effects of retinol shortage include lack of growth in children, disorders of the skin and lowered resistance to infection. Xerophthalmia is a condition in which the cornea dries out and blindness can occur. This is an extreme effect of retinol shortage. Dietary requirement of retinol An average male adult needs to obtain 750 1-tg of retinol per day. Since retinol is widely available in food, is not easily destroyed by normal cooking, and can be stored in the body, the deficiency diseases described above are not a major problem in the UK.

Yeast, liver, kidney, cereals, cheese, eggs, meat, milk and potatoes B 2 (riboflavin) Involved in the formation of red blood cells (along with another B vitamin- folic acid). If insufficient vitamin B 12 is absorbed (this is more likely to be because of a faulty absorption mechanism than dietary shortage) then too few red blood cells are made and a serious condition, pernicious anaemia, results. Involved in the release of energy from food. If this process does not occur correctly, there may be a chemical build-up resulting in a weakening of the muscles, and problems with nervous and circulatory systems.

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A scientist at the seashore by James Trefil

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