scholarly journals Antimicrobial Effect of Silver Ionised Water Prepared with the Sintering Coating Method—Effect on Acid Production in Plaque

Health ◽  
2021 ◽  
Vol 13 (03) ◽  
pp. 299-305
Author(s):  
Shiho Morishita ◽  
Shigeru Watanabe ◽  
Kei Miyazawa ◽  
Iwai Tohnai
Keyword(s):  
Acid Production ◽  
Antimicrobial Effect ◽  
Method Effect ◽  
Coating Method

Disk supported carbon membrane via spray coating method: Effect of carbonization temperature and atmosphere

2018 ◽  
Vol 195 ◽  
pp. 295-304 ◽  
Author(s):  
N.H. Ismail ◽  
W.N.W. Salleh ◽  
N. Sazali ◽  
A.F. Ismail ◽  
N. Yusof ◽  
...  
Keyword(s):  
Spray Coating ◽  
Carbonization Temperature ◽  
Carbon Membrane ◽  
Method Effect ◽  
Coating Method

The Effects of Sorbate on Oral Streptococci Grown in Continuous Culture

1986 ◽  
Vol 65 (6) ◽  
pp. 895-898 ◽  
Author(s):  
A.H. Rogers
Keyword(s):  
Continuous Culture ◽  
Acid Production ◽  
Antimicrobial Agents ◽  
Antimicrobial Effect ◽  
Defined Medium ◽  
Low Ph ◽  
Potassium Sorbate ◽  
Culture Vessel ◽  
Oral Streptococci ◽  
Ph Level

The antimicrobial effect of potassium sorbate on Streptococcus mutans and S. milleri grown in continuous culture was determined at pH values of 7.0, 5.5, and 5.0. Organisms were grown glucose-limited at a dilution rate of D = 0.1 h-1, corresponding to a doubling time of ca. seven hours, in a chemically defined medium under an atmosphere of 5% CO2 in N2. After equilibration at the appropriate pH level, the culture vessel was pulsed with potassium sorbate to a final concentration of 20 mmol L-1 or with sorbate followed almost immediately by a pulse of glucose (to 40 mmol L-1); that is, the cultures were exposed to transient excesses of sorbate with and without glucose - such as might occur during meals. At pH 7.0, sorbate had virtually no effect on glucose uptake and on the, albeit transient, increase in growth rate and acid production by both organisms. At pH 5.5 and 5.0, both cell viability and acid production in S. milleri were depressed following a pulse of sorbate, the effect being even more marked after a sorbate/glucose pulse. At low pH, the uptake of glucose in the presence of sorbate was drastically reduced. The effect on S. mutans was less marked, but growth and acid production were greatly depressed at pH 5.0 following consecutive pulses of sorbate. The antimicrobial effect of the widely used preservative potassium sorbate, at low pH, is confirmed for oral streptococci, and it is suggested that continuous culture offers a relevant system for testing potential antimicrobial agents.

Question Wording Effects in the Assessment of Global Self-Esteem

2000 ◽  
Vol 16 (1) ◽  
pp. 13-19 ◽  
Author(s):  
Martin Dunbar ◽  
Graeme Ford ◽  
Kate Hunt ◽  
Geoff Der
Keyword(s):  
Reading Ability ◽  
Factor Model ◽  
Self Esteem ◽  
Reading Scores ◽  
Poor Reading ◽  
Method Effect ◽  
Two Samples ◽  
Positive Item ◽  
Method Effects ◽  
Best Fit

Summary: Marsh (1996) produced evidence that method effects associated with negatively worded items might be responsible for the results of earlier factor analytic studies that reported finding positive and negative self-esteem factors in the Rosenberg Global self-esteem scale ( Rosenberg, 1965 ). He analyzed data collected from children using a 7-item self-esteem measure. This report details attempts to replicate Marsh 's analysis in data collected from two samples of adults who completed the full 10-item Global Self-Esteem (GSE) scale. The results reported here are similar to those given by Marsh in so much as a correlated uniquenesses model produced a superior fit to the data than the simple one factor model (without correlated uniquenesses) or the often reported two factor (positive and negative self-esteem) model. However, whilst Marsh reported that the best fit was produced by allowing negative item uniquenesses to correlate with each other, the model that produced the best fit to these data was one that contained correlated positive item uniquenesses. Supporting his claim that differential responding to negative and positive self-esteem items reflects a method effect associated with reading ability, Marsh also showed that factors associated with negative and positive items were most distinct among children who had poor reading scores. We report a similar effect among a sample of older adults where the correlation between these factors was compared across two groups who were selected according to their scores on a test of verbal reasoning.

Confound It!

2019 ◽  
Vol 35 (6) ◽  
pp. 855-867 ◽  
Author(s):  
John T. Kulas ◽  
Rachael Klahr ◽  
Lindsey Knights
Keyword(s):  
Social Desirability ◽  
Response Pattern ◽  
Experimental Manipulation ◽  
Scoring Method ◽  
Method Effect ◽  
Coding Method ◽  
The Social ◽  
Current Article ◽  
Method Factors ◽  
Psychological Inventory

Abstract. Many investigators have noted “reverse-coding” method factors when exploring response pattern structure with psychological inventory data. The current article probes for the existence of a confound in these investigations, whereby an item’s level of saturation with socially desirable content tends to covary with the item’s substantive scale keying. We first investigate its existence, demonstrating that 15 of 16 measures that have been previously implicated as exhibiting a reverse-scoring method effect can also be reasonably characterized as exhibiting a scoring key/social desirability confound. A second set of analyses targets the extent to which the confounding variable may confuse interpretation of factor analytic results and documents strong social desirability associations. The results suggest that assessment developers perhaps consider the social desirability scale value of indicators when constructing scale aggregates (and possibly scales when investigating inter-construct associations). Future investigations would ideally disentangle the confound via experimental manipulation.

Effect of coating method on release of Glimepiride from porosity osmotic pump tablets (POPTs)

2020 ◽  
pp. 37-45
Keyword(s):  
In Vitro Release ◽  
Osmotic Pump ◽  
Release Time ◽  
Once Daily ◽  
Coating Solution ◽  
Continuous Release ◽  
Red Color ◽  
Coating Method ◽  
Osmotic Agent

In this study, once-daily porosity osmotic pump tablets (POPTs) of Glimepiride were prepared using HPMC K100M (61%), osmotic agent (30% NaCl) coated using two different coating techniques spraying and dipping methods. The coating solution composed of ethyl cellulose (7.5%) w\w in ethanol (90%), castor oil (2%) as water-insoluble plasticizer and Gingo red color (0.5% w\w). In both techniques, the coating level was adjusted to give a 10% increase in the weight of the tablets. The effect of the coating by dipping technique with an increase in the weight of tablet (10 %, 20% & 50%) was also investigated to see the effect coating level on the percentage of drug release from POPTs. The results of the in vitro release of Glimepiride from tablets coated by the spraying method showed longer release time (24 hrs) than those coated with dipping method. On the other hand, increasing the coating level by dipping method retarded the release of the drug from tablets. However, the same retardation effect on release as shown with the spraying technique was only obtained by increasing the coating level with a 50% increase in the weight of the tablet. Thus, coating by spraying is more efficient to prepare POPTs to give a continuous release of Glimepiride from once daily table with the lowest increase in the total weight of the tablet.

Effect of Various Parameters on Citric Acid Production using Different Substrates

2012 ◽  
Vol 3 (7) ◽  
pp. 1-3
Author(s):  
Pawar V.A Pawar V.A ◽  
◽  
Pawar P.R Pawar P.R
Keyword(s):  
Citric Acid ◽  
Acid Production ◽  
Citric Acid Production
Sign in / Sign up

Export Citation Format

Share Document