منابع مشابه
Following comets
an inferior hand of genes. Fetuses are today commonly screened for genetic disorders and this service will no doubt expand. An American company has devised a one-inch chip carrying 400,000 DNA fragments, which will allow the entire human genome to be screened for an average of four alleles per gene. The difference between eliminating the undesirable and promoting the advantageous is becoming to...
متن کاملMedical Comets: Scholarly Contributions
collection of pages from lecture notes, the lab manual, and figures from Haines and Nolte. In other words, for medical students studying neuroanatomy there was no single yet comprehensive source that would address the gritty neuroanatomical details and yet present integrative cases that would illustrate the diseases such as Parkinson's in the context of a clinical setting. So when I had the cha...
متن کاملSubmillimeter Continuum Emission from Comets
We report submillimeter continuum observations of five comets obtained at the James Clerk Maxwell Telescope on Mauna Kea. Two of the five comets (P/Brorsen-Metcalf and Okazaki-Levy-Rudenko) were detected at 800-~m wavelength, while physically significant upper limits were placed on the other three (Austin 1989Cl, P/Faye, and Levy 1990c). We compare the JCMT • data with millimeter continuum meas...
متن کاملAsteroids, Comets, and Planet Formation
The solar system includes numerous small objects, generally classifiable as asteroids, comets, or interplanetary dust. Asteroids and comets are of considerable importance in the study of the terrestrial planets. The impacts of these bodies with the planets have repeatedly reshaped the planets' surfaces, redistributed the surface materials and changed their chemistry and mineralogy. In addition,...
متن کاملObservations of molecules in comets
Comets are among the most primitive bodies of the Solar System, and their chemical composition is rich in information on the protosolar nebula and its possible connection with interstellar cloud chemistry. Comets are also a source of light atoms and probably of prebiotic organic molecules for the early Earth. We know better and better cometary volatiles through spectroscopy, mainly at infrared ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Scientific American
سال: 1916
ISSN: 0036-8733
DOI: 10.1038/scientificamerican11041916-291asupp