منابع مشابه
Estimating the Relative Contributions of New Genes from Retrotransposition and Segmental Duplication Events during Mammalian Evolution
Gene duplication has long been recognized as a major force in genome evolution and has recently been recognized as an important source of individual variation. For many years the origin of functional gene duplicates was assumed to be whole or partial genome duplication events, but recently retrotransposition has also been shown to contribute new functional protein coding genes and siRNA’s. Here...
متن کاملReport of an interesting case of small bowel duplication [Persian]
A 13 years old boy with severe abdominal pain and history of intermittent (II bleeding since the aye of 3 months, is presented. Different diagnostic procedures were unremarkable. A Tc-99m Pertechnetate abdominal study revealed abnormal radionuclide accumulation in small bowel region. Duplication of small bowel was suspected which was confirmed by surgery and patholo...
متن کاملComplete colonic duplication in children
Background: Complete colonic duplication is a very rare congenital anomaly that may have different presentations according to its location and size. Complete colonic duplication can occur in 15% of gastrointestinal duplication. We report two cases of complete colonic duplications, and their characteristics. Case Presentation: We present two patients with complete colonic duplication with differ...
متن کاملNotes on amalgamated duplication of a ring along an ideal
In this paper, we study some ring theoretic properties of the amalgamated duplication ring $Rbowtie I$ of a commutative Noetherian ring $R$ along an ideal $I$ of $R$ which was introduced by D'Anna and Fontana. Indeed, it is determined that when $Rbowtie I$ satisfies Serre's conditions $(R_n)$ and $(S_n)$, and when is a normal ring, a generalized Cohen-Macaulay ring and finally a filter ring.
متن کاملNovel Presentation of Complete Coronal Urethral Duplication: a Case Report
Urethralduplication is a rare condition occurs as a congenital malformation either independently or in the setting of other congenital malformations such as caudal duplication syndrome. Its prevalence becomes even rarer if it manifests as two side-by-side tracts in coronal plan.Nonetheless, we introduce a unique presentation of complete coronal urethral duplication accompanied by astoundin...
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ژورنال
عنوان ژورنال: Botanical Gazette
سال: 1896
ISSN: 0006-8071
DOI: 10.1086/327451