Results 231 to 240 of about 167,013,277 (277)
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German Research, 2014
AbstractProtozoa play a key role in the food webs of the oceans. Ecologists are seeking to understand the evolution and species diversity of microbial plankton — both in the laboratory and at the bottom of the hostile, low‐oxygen deep‐sea basins of the Mediterranean Sea.
Thorsten Stoeck, Lea Weinisch
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AbstractProtozoa play a key role in the food webs of the oceans. Ecologists are seeking to understand the evolution and species diversity of microbial plankton — both in the laboratory and at the bottom of the hostile, low‐oxygen deep‐sea basins of the Mediterranean Sea.
Thorsten Stoeck, Lea Weinisch
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Science, 1998
WASHINGTON, D.C.-- DNA, RNA, and the ribosomes that help translate the genetic code into proteins have a fixed size, which puts a limit on how small a self-replicating cell can be, according to a group of experts who gathered at the National Academy of Sciences last month to discuss the limits of life at the tiniest level.
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WASHINGTON, D.C.-- DNA, RNA, and the ribosomes that help translate the genetic code into proteins have a fixed size, which puts a limit on how small a self-replicating cell can be, according to a group of experts who gathered at the National Academy of Sciences last month to discuss the limits of life at the tiniest level.
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Scientific American, 2009
The article discusses the possibilities of how life evolved through the analysis of a previously undiscovered hot vent ecosystem, named the Lost City, on the seafloor. In 2000 researchers discovered an undersea hydrothermal vent that they sampled and analyzed.
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The article discusses the possibilities of how life evolved through the analysis of a previously undiscovered hot vent ecosystem, named the Lost City, on the seafloor. In 2000 researchers discovered an undersea hydrothermal vent that they sampled and analyzed.
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New technologies and scientific imagination rearrange the boundary that we identify as the beginning and end of life. New techno-social constellations, such as the ever-increasing presence of digital avatars and genetic screenings, implore us to reconsider and transcend the existing definitions of life and death.
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Limited Resources Limiting Life?
2002The question, “Is death ever preferable to life?” is only meaningful if there can be a choice between life and death. Even if that choice is made, there may be constraints on that preference being satisfied. Limited resources and the need to ration resources are such a constraint on being able to choose life, or satisfy a preference for life.
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Bioethics: limits to the interference with life
Animal Reproduction Science, 2000The paper presents a review of various ethical considerations to which the application of modern biotechnology in breeding of domestic animals gives rise. The review is based on an automated literature search, covering papers and reports within agricultural bioethics published since 1992.
Christiansen, Stine Billeschou +1 more
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Parenting with a Life-Limiting Illness
Child and Adolescent Psychiatric Clinics of North America, 2018Parents with life-threatening illness face unique challenges in their dual roles as patients and parents. They are at risk for depression, parenting stress, and impaired family functioning, and their children are at risk for adjustment difficulties. In addition to treatment of depression and other mental health issues, patients may also benefit from ...
Sarah E, Shea, Cynthia W, Moore
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2002
We are fascinated by the seemingly impossible places in which organisms can live. There are frogs that freeze solid, worms that dry out and bacteria that survive temperatures over 100˚C. What seems extreme to us is, however, not extreme to these organisms. In this captivating account, the reader is taken on a tour of extreme environments, and shown the
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We are fascinated by the seemingly impossible places in which organisms can live. There are frogs that freeze solid, worms that dry out and bacteria that survive temperatures over 100˚C. What seems extreme to us is, however, not extreme to these organisms. In this captivating account, the reader is taken on a tour of extreme environments, and shown the
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The limits of life on Earth and searching for life on Mars
Journal of Geophysical Research: Planets, 1997Considerations of basic properties of bacteria such as size, structure, and metabolic versatility allow one to understand how these remarkable life‐forms are so adaptable to environments previously thought to be uninhabitable. It is now appreciated that bacteria on Earth can utilize almost any redox couple that yields energy, taking advantage of this ...
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