منابع مشابه
Jumping Champions and Gaps between Consecutive Primes
For any real x, the most common difference that occurs among the consecutive primes less than or equal to x is called a jumping champion. This term was introduced by J. H. Conway in 1993. There are occasionally ties. Therefore there can be more than one jumping champion for a given x. The first, but short-lived, jumping champion is 1. Aside from the numerical studies, nothing else has been prov...
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The term ‘horizontal transfer (HT)’ refers to the transfer of genetic material between two reproductively isolated organisms. HT is thought to occur rarely in eukaryotes compared to vertical inheritance, the transmission of DNA from parent to offspring. In a recent study we have provided evidence that a family of DNA transposons, called SPACE INVADERS or SPIN, independently invaded horizontally...
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Assessment strategies are an important component in game theoretical models of contests. Strategies can be either based on one's own abilities (self assessment) or on the relative abilities of two opponents (mutual assessment). Using statistical methodology that allows discrimination between assessment types, we examined contests in the jumping spider Phiddipus clarus. In this species, aggressi...
متن کاملDNA damage promotes jumping between templates during enzymatic amplification.
Pairs of templates and primers were designed so that only recombination events would lead to amplification via the polymerase chain reaction. This approach reveals that lesions such as breaks, apurinic sites, and UV damage in a DNA template can cause the extending primer to jump to another template during the polymerase chain reaction. By comparing sequences of amplification products that were ...
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Lactose in dairy systems can exist in various crystalline and non-crystalline forms. These forms affect lactose behaviour, particularly in processing and storage of low-water dairy foods. Crystalline -lactose monohydrate and anhydrous -lactose are well-known solid forms of lactose, which are relatively poorly soluble in water. Its occurrence in two anomeric forms, and -lactose, makes its solubi...
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ژورنال
عنوان ژورنال: Nature
سال: 2000
ISSN: 0028-0836,1476-4687
DOI: 10.1038/35003088