منابع مشابه
The Brain Finally Gets Into the Act
The theory of clinical depression presented here integrates etiological factors, changes in specific structural and cellular substrates, ensuing symptomatology, and treatment and prevention. According to this theory, important etiological factors, such as stress, can suppress the production of new neurons in the adult human brain, thereby precipitating or maintaining a depressive episode. Most ...
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Partaking in this grisly feast are the larvae of a parasitoid wasp, Copidosoma floridanum. Like other wasps, Copidosoma are haplodiploid: Fertilized eggs produce females; unfertilized eggs become males. These wasps are also polyembryonic: Eggs split to produce many clonal embryos. A single host may contain multiple eggs from multiple females, resulting in a hodgepodge of genetic relationships. ...
متن کاملMan and his spaceships
The resiliency and adaptive ability of microbial life in real time on Earth relies heavily upon horizontal gene transfer. Based on that knowledge, how likely is earth based microbial life to colonize extraterrestrial targets such as Mars? To address this question, we consider manned and unmanned space exploration, the resident microbiota that is likely to inhabit those vehicles, the adaptive po...
متن کاملMan and His Future
The subject matter of this Ciba symposium departs from the usual specialized, esoteric topics of these meetings. Bringing together such noted scientists as Sir Julian Huxley, Joshua Lederberg, Albert Szent-Gy6rgi, and J. B. S. Haldane, this conference discusses the future of mankind as seen through the eyes of people actively engaged in biological research. These men don the philosopher's hat a...
متن کاملLeonhard Euler His Life, The Man, and His Work
On the occasion of the 300th anniversary of Euler’s birth (on April 15), an attempt is made to bring Euler’s genius to the attention of a broad segment of the educated public. The three stations of his life—Basel, St. Petersburg, and Berlin—are sketched and the principal works identified in more or less chronological order. To convey a flavor of his work and its impact on modern science, a sele...
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ژورنال
عنوان ژورنال: The Journal of Thoracic and Cardiovascular Surgery
سال: 2017
ISSN: 0022-5223
DOI: 10.1016/j.jtcvs.2017.06.008