منابع مشابه
Evolution in alternatives to blood transfusion.
Exposure of patients to allogeneic blood transfusion can be minimized or avoided by the systematic use of multiple blood conservation techniques. Such strategies exploit appropriate combinations of drugs, technological devices, and surgical/medical techniques. It also demands an interdisciplinary team approach, combining medical, surgical, and other specialists who share a commitment to avoidin...
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This paper presents a solution for managing spatio-temporal data in a gis database. This solution allows eeciently storing and handling temporal data and alternatives using a version mechanism. It can be used for diierent types of gis-based applications, such as urban planning, environmental control and utility management.
متن کاملA new crustacean from the Herefordshire (Silurian) Lagerstätte, UK, and its significance in malacostracan evolution
Cascolus ravitis gen. et sp. nov. is a three-dimensionally preserved fossil crustacean with soft parts from the Herefordshire (Silurian) Lagerstätte, UK. It is characterized by a head with a head shield and five limb pairs, and a thorax (pereon) with nine appendage-bearing segments followed by an apodous abdomen (pleon). All the appendages except the first are biramous and have a gnathobase. Th...
متن کاملThe evolution of meiotic sex and its alternatives
Meiosis is an ancestral, highly conserved process in eukaryotic life cycles, and for all eukaryotes the shared component of sexual reproduction. The benefits and functions of meiosis, however, are still under discussion, especially considering the costs of meiotic sex. To get a novel view on this old problem, we filter out the most conserved elements of meiosis itself by reviewing the various m...
متن کاملExpanding the repertoire of biofuel alternatives through metabolic pathway evolution.
A multitude of concerns that include climate change, political instability, and depletion of petroleum resources has recently ignited renewed interest in fossil fuel alternatives (1). As a result, microbial systems have been extensively explored and successfully used for the biosynthesis of some biofuels, most notably ethanol (2, 3). Higher-chain alcohols, however, offer several advantages comp...
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ژورنال
عنوان ژورنال: Australian Museum Memoir
سال: 1984
ISSN: 0067-1967
DOI: 10.3853/j.0067-1967.18.1984.368