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... Computers So, you thought this item was going to be about advances in chips, modems, and related hardware? It's not about software either. It's about bioware. The title of a recent article in Science began with: "Genomic Cis-Regulatory Logic." That's obscure enough to make you move on to the next article, particularly when you see that sea urchins are involved. But buried in all the technical jargon is a profound discovery: The genes of all living things, from sea urchins to humans, are in reality systems consisting of thousands of simple computational devices. Very, very briefly, the regulatory regions for animal genes, are termed "promoters." Promoters typically consist of a few hundred to several thousand bases of DNA. In ... work of Yuh et al, the article's authors, these promoters are seen to perform as logic circuits, just like those bits of silicon in your PC. These tiny, DNA-based biological logic circuits determine how genes are interpreted (each gene may be interpreted in several ways), and, in the end, how lifeforms develop from embryo to adult. (Yuh, Chiou-Hwa, et al; "Genomic CisRegulatory Logic: Experimental and Computational Analysis of a Sea Urchin Gene," Science, 279:1896, 1998. Also: Wray, Gregory A.; "Promoter Logic," Science, 279:1871, 1998.) Comment. Figuring out how your PC's hardware evolved is child's play compared to elucidating just how random mutation ...

Terms matched: 2 - Score: 263 - 15 May 2017 - URL: /sf117/sf117p15.htm

2. Crystal Engineering

... Science Frontiers ONLINE No. 70: Jul-Aug 1990 Issue Contents Other pages Home Page Science Frontiers Online All Issues This Issue Sourcebook Project Sourcebook Subjects Crystal Engineering Left to themselves, molecules of calcium carbonate tend to crystallize into neat rhombohedrons. But when a sea urchin gets hold of the same molecules, its biological machinery coaxes them into crystallizing into long spines, complete with pores and curved edges. X-ray diffraction patterns prove that the spines are all one crystal . In like fashion, bacteria mold miniature single-crystal bar magnets for navigational purposes. Many animals indulge in crystal engi neering. Now if we can only train organisms to build crystalline electronic devices for us. Biogenic chips? (Mann, Stephen; "Crystal Engineering: The Natural Way," New Scientist, p ... 42. March 10, 1990.) From Science Frontiers #70, JUL-AUG 1990 . 1990-2000 William R. Corliss ...

Terms matched: 2 - Score: 168 - 15 May 2017 - URL: /sf070/sf070b08.htm

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	Science Frontiers The Unusual & Unexplained Strange Science * Bizarre Biophysics * Anomalous astronomy From the pages of the World's Scientific Journals Archaeology Astronomy Biology Geology Geophysics Mathematics Psychology Physics

	About Science Frontiers Science Frontiers is the bimonthly newsletter providing digests of reports that describe scientific anomalies; that is, those observations and facts that challenge prevailing scientific paradigms. Over 2000 Science Frontiers digests have been published since 1976. These 2,000+ digests represent only the tip of the proverbial iceberg. The Sourcebook Project, which publishes Science Frontiers, also publishes the Catalog of Anomalies, which delves far more deeply into anomalistics and now extends to sixteen volumes, and covers dozens of disciplines. Over 14,000 volumes of science journals, including all issues of Nature and Science have been examined for reports on anomalies. In this context, the newsletter Science Frontiers is the appetizer and the Catalog of Anomalies is the main course. Subscriptions Subscriptions to the Science Frontiers newsletter are no longer available. Compilations of back issues can be found in Science Frontiers: The Book, and original and more detailed reports in the The Sourcebook Project series of books. The publisher Please note that the publisher has now closed, and can not be contacted.

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