PubMed Health⌕ Search

Biomedical subjects

S Asokan

Publications and source records attributed to S Asokan.

At least 19 recordsLinked to original sources
PubMed2003

Studies on Merops orientalis Latham 1801 with special reference to its population in Mayiladuthurai, Tamil Nadu.

Role of habitat-structure and climatic factors in the population dynamics of the small green bee-eater Merops orientalis was evaluated in three habitats viz., agricultural lands, river banks and human habitations during 1991-1993. The river banks supported relatively high population of bee-eaters (157/Km2) followed by the agricultural lands (101/Km2) and human habitations (58/Km2). Bee-eater populations showed year-wise variations in river banks and human habitations having high values during 1992 (123/Km2) and 1993 (43/Km2) respectively. Agricultural lands showed a significantly low mean density in 1991 than other years. Seasonal variations in the bee-eater densities among the habitats were also recorded. Vegetation structure, food (insects) availability, climatic conditions and human disturbance were the casual factors for variations in bee-eater populations.

Animals↗
PubMed2000

Post partum splenic artery aneurysm rupture.

Ruptured splenic artery aneurysm during pregnancy is a rare event with high maternal and fetal mortality rate. A case of ruptured splenic artery aneurysm in the post partum period is presented. The literature is reviewed on pathophysiology, clinical presentation and management of this rare and potentially fatal entity.

Adult↗
PubMed1993

Refinement of the spinal muscular atrophy locus to the interval between D5S435 and MAP1B.

The childhood-onset SMA locus has been mapped to chromosome 5q13, in a region bounded by the proximal locus, D5S6, and the closely linked distal loci, D5S112 and MAP1B. We now describe a highly polymorphic, tightly linked microsatellite marker (D5S435) that is very likely the closest proximal marker to the SMA locus. Multipoint linkage analysis firmly establishes the following order of markers at 5q13: centromere-D5S76-D5S6-D5S435-MAP1B/D5S112- D5S39-telomere. The data indicate that SMA resides in an approximately 0.7-cM (range 0.1-2.1) region between D5S435 and MAP1B. This finding reduces by approximately fourfold the genetic region that most likely harbors the SMA locus and will facilitate the physical mapping and cloning of the disease gene region.

Base Sequence↗
PubMed1993

Diminished support for linkage between manic depressive illness and X-chromosome markers in three Israeli pedigrees.

The hypothesis that chromosomal region Xq27-28 harbours a gene for manic-depression has been a focus of interest in human genetics. X-linked inheritance of manic depressive illness has been re-examined in 3 multigeneration Israeli kindreds. Extension and re-evaluation of pedigree data, including new individuals, diagnostic follow-up, and analysis with DNA markers, shows greatly diminished support for linkage to Xq28. The peak lod scores in two of the pedigrees have dropped several lod units to clearly negative values at the RCP-F8-G6PD gene cluster. On the other hand, positive lod scores (Zmax = 2.09) are sustained in another pedigree at the same map location. None of the pedigrees show linkage to more proximal markers, including the Xq27 locus DXS98. Our analysis underscores the uncertainties in studying complex disorders.

Adult↗
PubMed1981

Pseudocyst of the pancreas in childhood. Current advances in diagnosis.

A pseudocyst of the pancreas is an uncommon problem in the pediatric patient. When present, more than half of these cases are caused by blunt trauma to the abdomen. Recent experience in the management of three cases demonstrated the importance of sonography in the diagnosis of lesion. Sonography is most effective and noninvasive, and false-positive results are rare. Sonography also was used to follow the progress of a resolving pseudocyst in one of these three cases. A more aggressive surgical approach is necessary in the management of this lesion.

Child↗
PubMed1978

Prenatal diagnosis of placental tumor by ultrasound.

A case of placental chorioangioma is reported. To our knowledge, this is the first case diagnosed prenatally by ultrasonography, The complications of chorioangiomas include hydramnios, antepartum hemorrhage and premature labor, fetal demise, low birth weight and toxemia.

Adult↗