We Dance round in a Ring and Suppose, but the Secret Sits in the Middle and Knows. Robert Frost Functional Differentiation of the Blastocystic Ring Trophoblast Cells in the Rat
نویسنده
چکیده
• It is accepted that the implantation consists of establishment of contacts between the trophoblast cells of blastocystic ring and the uterine epithelium. Prior to the contact with uterine epithelium the blastocyst undergoes a series of physiological and developmental changes. The formation and differentiation of blastocystic ring and its ultrastructural and cytochemical aspects have been extensively studied (1-21). The stages of blastocystic ring formation, preimplantation, epithelial penetration, and related biochemical events vary significantly among different species of mammals (22).
منابع مشابه
We Dance round in a Ring and Suppose, but the Secret Sits in the Middle and Knows
• Traumatic lesions to the spinal cord of adult individuals will cause degeneration of the severed distal axons, retraction of the severed proximal axons, scar formation in the damaged area, and eventually regenerative signs, which will occur along the retracted proximal axons. Growth cone-like appendages appear and regenerating axons enter the scar tissue. Within the relatively unstructured sc...
متن کاملA Note on Artinianess of Certain Generalized
Let ?: R0?R be a ring homomorphism and suppose that a and a0, respectively, are ideals of R and R0 such that is an Artinian ring. Let M and N be two finitely generated R-modules and suppose that (R0,m0) is a local ring. In this note we prove that the R-modules and are Artinian for all integers i and j, whenever and . Also we will show that if a is principal, then the R-modules and ...
متن کاملRings in which elements are the sum of an idempotent and a regular element
Let R be an associative ring with unity. An element a in R is said to be r-clean if a = e+r, where e is an idempotent and r is a regular (von Neumann) element in R. If every element of R is r-clean, then R is called an r-clean ring. In this paper, we prove that the concepts of clean ring and r-clean ring are equivalent for abelian rings. Further we prove that if 0 and 1 are the only idempotents...
متن کاملI-32: Implantation and Recurrent PregnancyLoss
Background: Recurrent pregnancy loss (RPL), defined as 3 or more consecutive pregnancy failures, is a common and distressing disorder. Chromosome instability in the conceptus is the most common cause whereas uterine factors are invariably invoked to explain nonchromosomal miscarriages. These uterine factors are, however, poorly defined. Materials amd Methods: Laboratory-based analysis of endome...
متن کاملEffects of Changes in Front Drafting Rollers Geometry on the Properties of Ring Spun Yarns
Regarding the importance of ring spinning method among spinning systems, great potentials exist for research about on the improvement of the quality and properties of ring spun yarn. This study aims to improve yarn quality by changing the shape and dimensions of spinning triangle through forming a groove in the middle zone of the front darfting 
roller with a curvature of 5 to 7 mm. For the ...
متن کامل