منابع مشابه
What Can Seismology Say About Hot Spots?
Seismology offers the highest-resolution view of mantle structure. In the decades since Morgan [1971] first proposed deep-mantle plumes, seismologists have used increasingly sophisticated methods to look for evidence of such structures, but so far they have had little success. This abstract outlines the relevant seismological methods for non-specialists and summarizes the current state of knowl...
متن کاملCan a genome change its (hot)spots?
A new study by Jeffreys et al. shows that the rate of recombination in recombination hotspots in humans is not constant through time. This observation adds weight to the idea that hotspots are transient on evolutionary timescales. However, questions remain as to what controls their evolution and how these rapid changes influence broad-scale rates of recombination.
متن کاملHow can we distinguish between mutational "hot spots" and "old sites" in human mtDNA samples?
New research into variation in mutation rates across nucleotide positions in human mitochondrial DNA (mtDNA) calls into question population genetics models that assume a constant mutation rate for all sites in a sequence, particularly for hypervariable control region segments I and II. Related to this research is discovering the extent to which highly polymorphic sites are really mutational "ho...
متن کاملHunger Hot Spots
September 20 07 During the 30 minutes it will take you to read this article, 360 preschool children will die of hunger and malnutrition. Twelve a minute, around the clock; more than six million a year. But that is only the tip of the proverbial and ugly iceberg. One in four preschoolers in developing countries suffers from hunger and nutritional deficiencies. These children do not grow to their...
متن کاملIdentifying Malaria Hot Spots
A century ago, malaria was prevalent across much of the inhabited world. With improvements in housing, environmental management, access to antimalarial drugs (quinine, followed by chloroquine), and use of the insecticide DDT, malaria was driven from Europe, North America, and the Union of Soviet Socialist Republics. Building on these early successes, the World Health Organization launched the f...
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ژورنال
عنوان ژورنال: NHRD Network Journal
سال: 2007
ISSN: 2631-4541,2631-455X
DOI: 10.1177/0974173920070507s