Now showing items 1-9 of 9
Evaluation of a new transport medium for the preservation of oral streptococci
(Elsevier, 1973-07)
The survival of pooled plaque bacteria and a mixed suspension of Streptococcus mutans, Streptococcus sanguis, Streptococcus mitis, and Streptococcus salivarius were tested in three transport media. A new, non-nutritive, ...
Evidence for the utilization of host tRNA(m5 U)methylase to modify tRNA coded by phage T4
(Elsevier, 1973-04)
Mutants of Escherichia coli defective only in the biosynthesis of 5-methyluridine (ribothymidine) in their transfer ribonucleic acid (tRNA) were employed to investigate whether phage T4 induces its own tRNA (m5U)methylase ...
Identification of Streptococcus mutans serotypes in dental plaque by fluorescent antibody techniques
(Elsevier, 1973-06)
The presence of Streptococcus mutans in dental plaque may be related to human dental caries. The cultural identification of this organism in plaque is not likely to be used routinely in a clinical or epidemiological ...
Effects of rifampicin, streptolydigin and actinomycin D on the replication of Col E1 plasmid DNA in Escherichia coli
(Elsevier, 1973-04-15)
We recently reported (Clewell et al., 1972) on an inhibitory effect of rifampicin on Col E1 plasmid replication. The present study represents a further characterization of this phenomenon as well as a study of the effects ...
Gene N regulator function of phage [lambda]imm21: Evidence that a site of N action differs from a site of N recognition
(Elsevier, 1973-12-25)
We report the isolation and characterization of a new mutation in the hybrid phage [lambda]imm21. Both genetic and physiological studies demonstrate that this new mutation, N21-1, is similar to N mutations of phage [lambda]. ...
Interference with the expression of the N gene function of phage [lambda] in a mutant of Escherichia coli
(Elsevier, 1973-01)
An Escherichia coli mutant nus, which inhibits the growth of [lambda] by inhibiting the expression of the [lambda] N gene product, has been further characterized. The N protein regulates phage development by stimulating ...
Recovery of Streptococcus mutans and Streptococcus sanguis from a dental explorer after clinical examination of single human teeth
(Elsevier, 1973-04)
Certain aspects of the bacterial flora adhering to a dental explorer following a tactile diagnostic examination of a single tooth were investigated. Plaque present on the explorer was dislodged, and suspended into a reduced ...
Reduction of supragingival plaque accumulations in institutionalized Down's syndrome patients by periodic treatment with topical kanamycin
(Elsevier, 1973-09)
A small group of institutionalized Down's syndrome patients were treated with topical kanamycin sulphate paste, once or twice a day for 3-5 days, every fifth week over a 52-week-period. The teeth were not brushed during ...
[lambda]imm[lambda][middle dot]434: A phage with a hybrid immunity region
(Elsevier, 1973-11)
The genomes of coliphages [lambda] and [lambda]imm434 are identical with the exception of the immunity region, which codes for the respective repressors and corresponding operators. Although previous genetic studies failed ...