Results 141 to 150 of about 1,727 (175)

Acidogenesis in relation to fluoride resistance of Streptococcus mutans

Oral Microbiology and Immunology, 1991
The velocity of acid production (Vap) of Streptococcus mutans C180‐2 and of 2 fluoride‐resistant mutant strains S. mutans C180‐2FR and S. mutans C180‐2MFR was examined in vitro at pH values between 7.0 and 4.5. The Vap of the fluoride‐resistant mutants was lower than the Vap of the parent strain at pH ≥6.0.
C, Van Loveren, Y M, Van de Plassche-Simons, J J, De Soet, J, De Graaff, J M, Ten Cate   +4 more
openaire   +2 more sources

[Acidogenesis and fluoride].

Giornale di stomatologia e di ortognatodonzia, 1989
The Authors consider the inhibition of acidogenesis in the dental plaque by topical application of fluoride. After an examination of the actions of fluoride on the bacterial component of dental plaque, the Authors come to the conclusion that inhibition of acidogenesis is one of the possible anticaries mechanism of topical fluoride.
G. Calderari, M. Bardelli, D. Re, V. Bacchetta   +3 more
openaire   +2 more sources

Continuous lactose fermentation by Clostridium acetobutylicum – Assessment of acidogenesis kinetics

Bioresource Technology, 2011
An assessment of the growth kinetics of acidogenic cells of Clostridium acetobutylicum DSM 792 is reported in the paper. Tests were carried out in a continuous stirred tank reactor under controlled conditions adopting a complex medium supplemented with lactose as carbon source to mimic cheese whey.
NAPOLI, FABIO, OLIVIERI, GIUSEPPE, RUSSO, MARIA ELENA, MARZOCCHELLA, ANTONIO, SALATINO, PIERO   +4 more
openaire   +4 more sources

Anaerobic fermentation of whey : acidogenesis

2010
Based on the initial exploratory results of single-phase (acidogenesis and methanogenesis takes place in one vessel) whey biomethanation studies, a two-phase (acidogenesis and methanogenesis takes place in two separated serial vessels) biomethanation process was found to be more suitable for dealing with the current whey utilisation and/or disposal ...
openaire   +1 more source

Maximization of acetic acid production in partial acidogenesis of swine wastewater

Biotechnology and Bioengineering, 2001
AbstractSwine wastewater was biologically treated to produce short‐chain volatile organic acids (VOAs) in laboratory‐scale continuously stirred tank reactors. The maximum production rates of acetic and butyric acids associated with simultaneous changes in pH and hydraulic retention time (HRT) were investigated, in which the degree of acidification of ...
Hwang, S, Lee, Y, Yang, KY
openaire   +3 more sources

Maximization of volatile fatty acids production from alginate in acidogenesis

Bioresource Technology, 2013
In this study, the response surface methodology (RSM) was applied to determine the optimum fermentative condition of alginate with the respect to the simultaneous effects of alginate concentration and initial pH to maximize the production of total volatile fatty acids (TVFAs) and alcohols.
Pham, Hong Duc, Seon, Jiyun, Lee, Seong Chan, Song, Minkyung, Woo, Hee Chul   +4 more
openaire   +3 more sources

Effect of xylitol and sorbitol on plaque acidogenesis.

Quintessence international (Berlin, Germany : 1985), 2009
To evaluate the in vivo potential of xylitol to reduce plaque acidogenicity in comparison to sorbitol.After completing a questionnaire on general health, smoking, diet, and oral hygiene habits, 61 dentate adults refrained from oral hygiene for 3 days before the clinical baseline examination, which included decayed, missing, and filled teeth (DMFT ...
Christian H, Splieth, Mohammad, Alkilzy, Jan, Schmitt, Christine, Berndt, Alexander, Welk   +4 more
openaire   +1 more source

Anaerobic acidogenesis of primary sludge: The role of solids retention time

Biotechnology and Bioengineering, 1994
AbstractThis research investigates the effect of solids retention time (SRT) on the acid‐phase anaerobic digestion of primary sludge. A series of experiments were conducted using two continuous‐flow 3‐L units with the following configuration: a completely mixed reactor (CMR) with clarifier and solids recycle and an upflow anaerobic sludge blanket (UASB)
P, Elefsiniotis, W K, Oldham
openaire   +2 more sources

Laboratory Research of Hydrolysis-Acidogenesis Process of Primary Sludge

Journal of Environmental Engineering, 2019
AbstractHydrolysis-acidogenesis of primary sludge is a suitable method to produce readily biodegradable organic matter.
Regimantas Dauknys, Anna Haluza, Aušra Mažeikienė   +2 more
openaire   +1 more source

Effect of Alkali Metal Cation on the Anaerobic Hydrolysis and Acidogenesis of Vegetable Waste

Environmental Technology, 2006
Five batch testing scenarios were designed to evaluate the effects of alkali metal cations on anaerobic hydrolysis and acidogenesis. These scenarios were A (c=0 g l(-1)), B (cNa+=25 g l(-1)), C (cNa+=50 g l(-1)), D (cK+=25 g l(-1)), and E (cK+=50 g l(-1), pH 7.0).
He, PJ, Lu, F, Shao, LM, Pan, XJ, Lee, DJ   +4 more
openaire   +2 more sources