scientific american - 2004 06 - nanotech and dna
scientific american - 2004 06 - nanotech and dna
... credit card infor- mation to 1-2 1 2-3 5 5-0 408 or make check payable to Scientific American, and mail your order to: Scientific American P.O. Box 1 0067 Des Moines, IA 5034 0-0 067 1-9 copies $10.95(US) ... Lois Lake, an 8.5-mile-long, 450-foot-deep reser- voir 120 miles north of Victoria, seasoned ROV pilot Craig Elder flies the Sawfish like a video-game junkie from a...
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scientific american - 1999 06 - scanners and scalpels
... brain and to distin- guish white and gray matter there; xe- non passes across the blood-brain bar- rier (producing anesthesia and eupho- ria). Even though xenon is harder to hyperpolarize and store ... OBSERVATORY Wolf-Rayet 104 News and Analysis20 Scientific American June 1999 L unar Prospector is not an impres- sive-looking spacecraft. Shaped like a soup can with its ends cut...
Ngày tải lên: 12/05/2014, 15:57
scientific american - 1993 06 - tuning in the radio signals of ancient galaxies
... based on mannuronic acid and guluronic acid: M-blocks and G- blocks,Ó Soon-Shiong notes. ÒM-blocks stimulate interleukin-1 and tumor ne- crosis factors; G-blocks do not.Ó The workers were able to ... particular v-SNARE that pairs it with a t-SNARE found only on the ap- propriate target membrane.” In the pres- ence of NSF and SNAPs, interactions be- tween the right v-SNAREs and t-SNA...
Ngày tải lên: 12/05/2014, 14:49
scientific american - 1994 06 - was there a race to the moon
... U.S. and Canada. Long-term monitoring is needed to track changes. SARAH LEEN Matrix Copyright 1994 Scientific American, Inc. SCIENTIFIC AMERICAN June 1994 33 I n 1939 a 33-year-old French mathe- matician ... bred failure and delays within the Soviet lunar-land- ing program. In contrast, the American eÝort received consistently strong po- litical and public support. The Nationa...
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scientific american - 1995 06 - the world's strongest magnets
... store bookkeeper in Þve -and- dime stores. The bookkeeper would receive the money and send back the change. Tubes re- placed Òcash children,Ó 1 0-, 1 1- and 1 2- year-olds who were exploited to per- form this ... custom-made embryos. ÒI sus- pect I came to this by virtue of being a Hitler refugee and being interested in eugenics and then in the revival of eu- genics and the...
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scientific american - 1996 06 - the space station
... objective: or- ange-throated males beat out blue- throats, blue-throats overpower yel- low-striped throats and yellow-striped throats checkmate orange-throats. These relations have generated a six- year ... Scientific American June 1996 S tep -and- repeat lithography is de- ceptively simple in principle. A high-inten- sity, shor t-wavelength light source is collimat- ed and focused on...
Ngày tải lên: 12/05/2014, 15:08
scientific american - 1997 06 - the microchip that rewires itself
... that land mines, forest strip- ping, random shootings and disease are decimating ape popula- tions in Rwanda, Zaire and Uganda. The western lowland gorilla, for instance, is now extinct in Zaire. And ... few compa- nies are developing sniffer devices. And the Jason report suggests that biotech- News and Analysis20 Scientific American June 1997 SCIENCE AND THE CITIZEN WAR WITH...
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scientific american - 1997 08 - age and energy
... between ATAMS and convention- al systems is that it will be updated ev- News and Analysis Scientific American August 1997 33 TECHNOLOGY AND BUSINESS COMMAND AND CONTROL Inside a hollowed-out mountain, ... with mitochondrial DNA inheritance). Fur- ther, research has already established that known mitochondrial DNA rear- Mitochondrial DNA in Aging and Disease46 Scientific...
Ngày tải lên: 12/05/2014, 15:29
scientific american - 1998 06 - liquid computers
... 1997 STANDARD STANDARD ≤10-MICRON-DIAMETER PARTICLES 24-HOUR AVERAGE 150 150 ANNUAL AVERAGE 50 50 ≤ 2.5-MICRON-DIAMETER PARTICLES 24-HOUR AVERAGE NONE 65 ANNUAL AVERAGE NONE 15 JOHN J. GODLESKI AND ... protect troops and cities abroad from short- and medium-range missile attacks. According to the Welch panel and other evaluations, poor manage- ment, inadequate prepara- tion and an o...
Ngày tải lên: 12/05/2014, 15:37
scientific american - 2000 06 - the birth of molecular electronics
... headaches and joint pain —drugs in the same class as ibuprofen and aspirin. The McGeers, hus- band -and- wife neuroscientists at the Uni- versity of British Columbia, are betting on nonsteroidal anti-in- flammatories ... all-digital flight con- trols. Dryden engineers Frank W. (Bill) Burcham, Jr., and Glenn B. Gil- yard (both now retired) found they could quickly and easily link bank-an...
Ngày tải lên: 12/05/2014, 16:03