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Biomedical subjects

S Dayal

Publications and source records attributed to S Dayal.

26 records · Page 2Linked to original sources
PubMed1991

Rotavirus spike structure and polypeptide composition.

Negatively stained preparations of rotavirus imaged with a low dose of electrons provide sufficient contrast to reveal surface projections or spikes. The number of spikes found projecting from different particles indicates that not all 60 peripentonal sites are occupied. Treatment at pH 11.2 with 250 mM ammonium hydroxide specifically removes the spikes, yielding smooth double-shelled particles of the same diameter as that of the native virus. Protein analysis confirms that the released spikes are composed of polypeptide VP4 (or its two cleavage products VP5* and VP8*) and that the smooth particle retains the other major outer shell protein VP7. Spikeless particles can be decorated by a monoclonal antibody specific for the major immunodominant neutralizing domain of VP7, implying that removal of the spikes does not denature the VP7 that is retained on the surface of the smooth particle.

Ammonium Hydroxide↗
PubMedDate not supplied

Variability of milk fat globule membrane protein gene between cattle and riverine buffalo.

A study on butyrophilin (BTN) gene was conducted to detect variability at nucleotide level between cattle and buffalo. Hae III PCR-RFLP was carried out in crossbred cattle and it revealed polymorphism at this locus. Three genotypes namely, AA, BB and AB and two alleles were observed with frequencies 0.78, 0.17, 0.04 and 0.87, 0.13, respectively. The sequences of different cattle, buffalo and sheep breeds have been reported in the EMBL gene bank with accession numbers: AY491468 to AY491475. The nucleotides, which have been substituted from allele A to B, were found to be C to G (71st nucleotide), C to T (86th nucleotide), A to T (217th nucleotide), G to A (258th nucleotide), A to C (371st nucleotide) and C to T (377th nucleotide). The nucleotide substitution at 71st, 86th and 377th position of the fragment were expected to be a silent mutation where as nucleotide changes at 217th, 258th and 371st positions were expected to be substituted by lysine with arginine, valine with isoleucine and leucine with proline in allele B. The differences of nucleotides and amino acids between cattle, buffalo and sheep breeds have been revealed and on the basis of nucleotide as well as protein variability the phylogenetic diagram have been developed indicating closeness between cattle and buffalo.

Animals↗
PubMedDate not supplied

Tissue plasminogen activator and plasminogen activator inhibitor status in Budd-Chiari syndrome.

Alterations in the plasma levels of tissue plasminogen activator (t-PA) and plasminogen activator inhibitor (PAI-1) as observed in various liver disorders are attributed to deranged liver function. Status of these parameters in patients with Budd-Chiari syndrome (BCS) has not been reported so far. In the present study 27 patients with BCS with hepatic and/or inferior vena cava occlusion were investigated for any defect in the fibrinolytic system. Mild to moderately deranged liver function tests were observed in all (except 2) patients. Three patients each showed mildy increased levels of t-PA (3/27) and PAI-1 (3/27). The levels of t-PA and PAI-1 however did not show any correlation with liver function parameters.

Adolescent↗
PubMedDate not supplied

Charter for disabled people using hospitals: a completed access audit cycle.

This completed audit cycle assessed access for disabled people to a district general hospital, in relation to standards laid down in the Royal College of Physicians Charter for Disabled People using Hospitals. The project was effective in demonstrating problems and implementing change to overcome them. It was also useful in raising disability awareness in the young investigators, who easily recognised the shortcomings in facilities for disabled people, and is proposed as a possible model for inclusion in medical undergraduate training programmes to raise disability awareness amongst a new generation of doctors.

Persons with Disabilities↗