Journal ArticleDOI
Effect of urea concentration on its utilization, on the pH and the formation of ammonia and carbon dioxide in a human salivary sediment system
S.D. Biswas,I. Kleinberg +1 more
TLDR
The formation of NH3 and CO2 indicated that pathways of urea catabolism are linked to pathways involved in theCatabolism of carbohydrate in a salivary sediment system.About:
This article is published in Archives of Oral Biology.The article was published on 1971-07-01. It has received 42 citations till now. The article focuses on the topics: Urease & Urea cycle.read more
Citations
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Journal ArticleDOI
A Mixed-bacteria Ecological Approach to Understanding the Role of the Oral Bacteria in Dental Caries Causation: an Alternative to Streptococcus mutans and the Specific-plaque Hypothesis
TL;DR: An understanding of mixed-bacterial metabolism, knowledge of how to manipulate and work with mixed bacteria, and the use of a bacterial metabolic vector approach have led to a more ecological focus for dealing with dental caries, and new means of developing and evaluating anti-caries agents directed toward microbial mixtures that counter excess acid accumulation and tooth demineralization.
Journal ArticleDOI
Bacterial ureases in infectious diseases
Robert A. Burne,Yi-Ywan M. Chen +1 more
TL;DR: This brief review discusses the biochemistry and genetics of bacterial ureases and outlines the roles of urea metabolism in microbial ecology and pathogenesis of some of the principle ureolytic species affecting human health.
Journal ArticleDOI
Chewing gum--facts and fiction: a review of gum-chewing and oral health.
TL;DR: The aim of this critical review--covering the effects of the physical properties of chewing gum and those of different ingredients both of conventional and of functional chewing gum--is to provide a set of guidelines for the interpretation of such claims and to assist oral health care professionals in counseling patients.
Book ChapterDOI
Adaptation of oral streptococci to low pH.
TL;DR: Reports concerning the means by which oral streptococci either utilize acidification to subdue their competitors or protect themselves until pH values return to a more favorable level are summarized.
Journal ArticleDOI
Genetics of Acid Adaptation in Oral Streptococci
TL;DR: The picture that emerges is that the acid-adaptive regulatory mechanisms of the oral streptococci differ markedly from those used by Gram-negative bacteria.
References
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Journal ArticleDOI
A New Simple Semimicro Method for Colorimetric Determination of Urea
J. J. Coulombe,L. Favreau +1 more
TL;DR: A new simple and rapid method for quantitative semimicro determination of blood urea is presented, with a maximum adsorption at 530 mµ stable at room temperature and requiring 0.2 ml.
Journal ArticleDOI
The amino acid pool in escherichia coli
TL;DR: Bacteria maintain internally synthesized small molecules at high internal concentrations and in addition have the capacity to concentrate many compounds from the environment.
Journal ArticleDOI
The pH of dental plaques in the different areas of the mouth before and after meals and their relationship to the pH and rate of flow of resting saliva
I. Kleinberg,G.N. Jenkins +1 more
TL;DR: The mandibular secretion seemed to be more important than that from the parotids in influencing regional plaque pH differences, and subjects with plaques that had such higher levels also had faster resting salivary flow rates.
Journal ArticleDOI
Intracellular polysaccharide storage by organisms in dental plaques. Its relation to dental caries and microbial ecology of the oral cavity.
TL;DR: A large proportion of the microbiota of dental plaques has been observed to produce polysaccharides of the glycogen-amylopectin type from glucose, and streptococci, diphtheroids and fusobacteria are among the organisms responsible.
Journal ArticleDOI
Effect of urea concentration on human plaque pH levels in situ.
TL;DR: The data showed that urea levels equivalent to those in saliva could produce a rise in plaque pH equivalent to the difference in pH between plaque and saliva which has been reported previously in fasting subjects.
Related Papers (5)
Urea content of gingival crevicular fluid and its relation to periodonal disease in humans
The pH of dental plaques in the different areas of the mouth before and after meals and their relationship to the pH and rate of flow of resting saliva
I. Kleinberg,G.N. Jenkins +1 more