conclusions it was found that the isolated bacteria produced biosurfactants that had a great potential for different industries. results the 3 isolates from cheese, yoghurt and silage were effective against isolated e.coli and could produce biosurfactants. phylogenic relationships of the 3 potential candidates were determined comparing the 16sr dna gene sequences, they were found to be as 3 iso...

objectives: the presence of e.coli in fish intended for human consumption may constitute a potential danger, not only in causing disease, but also because of the possible transfer of antibiotic resistance from aquatic bacteria to those infecting humans. the objective of this study was to develop an improved pcr method based on species – specific 16 s rrna gene primers (fes, res) for detection o...

identification  of clinically  significant  nocardia  species  is essential  for the definitive diagnosis, predict antimicrobial susceptibility, epidemiological purposes,  and  for  an  effective  treatment.   conventional   identification   of nocardia species in routine medical laboratories which is based on phenotypic (cellular morphology, colonial characteristics), biochemical and enzymatic...

background : many  helicobacter pylori strains express adhesin proteins that bind to specific  host-cell  macromolecule  receptors,  like sialic acid binding adhesion ( saba ).    saba-expressing  strains have been associated with gastric cancer  and  negatively  associated   with  duodenal   ulcers. the  aim  of  this study  was  to  determine   the  status  of   saba   gene  of   h.  pylori  ...

The nature of the arrangement of 16S and 23S ribosomal RNA genes on the Bacillus subtilis chromosome was studied by means of a Cs(2)SO(4) density gradient centrifugation technique after complexing DNA-(ribosomal) RNA hybrids with mercuric ions. It was observed that the same fragments of single-stranded DNA with an average molecular weight of 1.9 x 10(6) which hybridize with 23S RNA also hybridi...

Ribosomes are structurally complex cell organelles consisting of ribosomal RNA and a number of different protein molecules. The complexity of these particles raises two major questions: What is the relationship between structure and function of the ribosome, and what is the mechanism of assembly of the ribosome? It is obvious that the study of these two questions would be greatly aided if a met...

A study was made of the nuclear RNA in HeLa cells with particular reference to the rapidly labelled fractions. It was found that if cells were incubated at a high density, that is, under 'step-down' conditions, there was a rapid accumulation of RNA in the nucleus. The fraction of the nuclear RNA which includes rapidly labelled RNA and which binds tightly to columns of methylated albumin on kies...