By John Daintith and Elizabeth Martin (Editors)

ISBN-10: 019956146X

ISBN-13: 9780199561469

ISBN-10: 1615835407

ISBN-13: 9781615835409

Hailed as "handy and readable" (Nature) and "well worthy shopping" (New Scientist), this best-selling dictionary includes 9,200 alphabetically prepared entries on all elements of chemistry, physics, biology (including human biology), earth sciences, and astronomy. as well as a wealth of trustworthy, up to date entries, clients will locate priceless brief biographies of major scientists, full-page illustrated positive aspects on matters equivalent to the sunlight procedure and Genetically transformed Organisms, and chronologies of particular medical topics together with plastics, electronics, and phone biology. This new version comprises accelerated assurance of world warming, forensic technological know-how, astrophysics, quantum idea, and the sun procedure. Supported through over 2 hundred diagrams and illustrations, the Dictionary of technology additionally comprises suggested internet hyperlinks for lots of entries, accessed and stored brand new through the spouse web site. eventually, it has appendices on SI devices, basic constants, geological time scale, a simplified type of the plant and animal kingdoms, and the periodic desk. either concise and wide-ranging, this quantity is a perfect reference paintings for college students or for a house library.

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Additional resources for A Dictionary of Science, Sixth Edition (Oxford Paperback Reference)

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Measuring the proportions of the - and -forms in a sample can, in principle, give an estimate of the time since death. Not all amino acids racemize at the same rate, and the rate of the process depends on other factors, such as moisture and temperature. Most work has been done using leucine or aspartic acid. A particular application in forensic science involves measuring the / ratio of aspartic acid in the dentine of teeth. Once a tooth has fully formed, the dentine is isolated by the enamel and then racemization takes place in the living subject at a fairly constant temperature and moisture level.

The cytoplasm of Amoeba consists of a central Ûuid endoplasm surrounded by a more viscous ectoplasm. The Ûuid endoplasm slides towards a amoebozoans a the front of the cell, forming a *pseudopodium and propelling the cell forward. On reaching the tip of the pseudopodium, the endoplasm is converted into ectoplasm; at the same time the ectoplasm at the rear of the cell is converted into endoplasm and streams forward, thus maintaining continuous movement. g. *Amoeba species), and archamoebas, such as the pelobionts (which lack mitochondria and many other features of eukaryotic cells apart from a membrane-bounded nucleus).

In plants the generation with sexual reproduction is called the *gametophyte and the asexual generation is the *sporophyte, either of which may dominate the life cycle, and there is also alternation of the haploid and diploid states. Thus in vascular plants the dominant plant is the diploid sporophyte; it produces spores that germinate into small haploid gametophytes. In mosses the gametophyte is the dominant plant and the sporophyte is the spore-bearing capsule. alternative splicing The splicing of the RNA transcript of a gene in different ways by the cellular machinery to create distinct mature messenger RNAs (mRNAs) encoding different proteins.

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A Dictionary of Science, Sixth Edition (Oxford Paperback Reference) by John Daintith and Elizabeth Martin (Editors)

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