نتایج جستجو برای: plaque ph
تعداد نتایج: 202027 فیلتر نتایج به سال:
Streptococcus mutans, a member of the dental plaque community, has been shown to be involved in the carious process. Cells of S. mutans induce an acid tolerance response (ATR) when exposed to sublethal pH values that enhances their survival at a lower pH. Mature biofilm cells are more resistant to acid stress than planktonic cells. We were interested in studying the acid tolerance and ATR-induc...
The rising anthropogenic atmospheric CO2 results in the reduction of seawater pH, namely ocean acidification (OA). In East China Sea, the largest coastal hypoxic zone was observed in the world. This region is also strongly impacted by ocean acidification as receiving much nutrient from Changjiang and Qiantangjiang, and organisms can experience great short-term natural variability of DO and pH i...
In this paper, the discrete wavelet packet frames are used to delineate the atherosclerotic plaque components using intravascular ultrasound (IVUS) backscattered signals. The frames are classified in an unsupervised fashion deploying K-means clustering technique and the generated prognosis histology (PH) images are quantified using relative histology images. While existing tissue characterizati...
Neospora caninum, a strictly intracellular protozoan, is a major leading cause of parasite-induced abortion in cattle. A widely held view of N. caninum infection is that both cellular proliferation and stage interconversion (tachyzoite-bradyzoite transformation) are triggered, perhaps even modulated by, changes in cultural conditions. This study tested the hypothesis that exposure of N. caninum...
Cells. HeLa cells (American Type Culture Collection, Rockville, Md.) were grown in 80 ml culture medium in Roux bottles. Cells were grown in Eagle's medium (7) which contained Hanks' balanced salt solution (1 1), 10% bovine serum, 100 @zg/mlstreptomycin sulfate, and 100 units/ml penicillin G. Bottles were incubated at 36°in an humidified atmosphere of 5% CO2 , and the cells were passed by tryp...
Desmosomes are intercellular adhering junctions characterized by a special structure and certain obligatory constituent proteins such as the cytoplasmic protein, desmoglein. Desmosomal fractions from bovine muzzle epidermis contain, in addition, a major polypeptide of Mr approximately 75,000 ("band 6 protein") which differs from all other desmosomal proteins so far identified by its positive ch...
groups, each group consisting of five subjects that were made to rinse with warm and cold water and chlorhexidine solution at temperature of 47°C and 18°C respectively.Plaque The micro-organisms in bacterial plaque comprise a decisive etiological factor in the origin and development of inflammatory periodontal diseases. Plaque is a complex biofilm that contains various microorganisms and forms ...
Nine oral bacteria, associated with both healthy and diseased sites in the mouth, were grown at D = 0.05 h-1 (mean generation time 13.9 h) in a glucose-limited chemostat. After an initial period of steady-state growth at pH 7.0, pH control was discontinued. The pH then decreased until it stabilized at pH 4.1 after 9 d (16 generations), while the Eh rose from -165 mV to +160 mV. The lowering in ...
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