The aim of this study was to determine the pH of several commercially available in-office and at-home dental bleaching products stored at room temperature and refrigerated. The products were divided into in-office (n=09) and at-home (n=12) bleaching gels and submitted to two different temperatures, namely, room temperature (23 degrees C +/- 1 degree C) and refrigeration temperature (4 degrees C...

s of PH. D. Theses Title: The Elaboration of Simulation Systems in sustainable agriculture Author: Dorian Drucioc Promotor: Dr.h. , Prof. Valentin Osadcii Date of defence: September 16, 1999 Institution: Free International University of Moldova

Alkaline phosphatase (phosphomonoesterase i.e. PMEase) activity in heterocystous cyanobacteria Anabaena flos-aquae, Nostoc calcicola, Calothrix brevissima, Scytonema javanicum and Hapalosiphon intricatus is known to be temperature and pH dependent. Maximum level of enzyme activity was recorded at either 35 degrees C or 37.5 degrees C. Also, the cell bound phosphomonoesterase enzyme was shown to...

The emergence of heterogeneous photocatalysis has facilitated redox reactions with high efficiency, without compromising the recyclability photocatalyst. Recently, stimuli-responsive photocatalytic materials have emerged as a powerful synthetic tool, simple and rapid recovery, well an enhanced dynamic control over reactions. Stimuli-responsive polymers are often inexpensive easy to produce. The...

Background and Objectives: Lactobacillus delbrueckii ssp bulgaricus is widely used in dairy industries as a starter for yogurt production. This study was designed using response surface methodology (RSM) in 12 batch pH-controlled cultures of Lactobacillus delbrueckii sub-ssp. bulgaricus for determining the effect of temperature and pH on the biomass production of a native strain of L. bulgaricu...

today, in parallel to growing in acceptance of functional products, various additives are used to improve the characteristics of functional food products. the coenzyme q 10 plays a vital role in cellular energy production. it also increases the body's immune system via its antioxidant activity. the aim of this study was to evaluate the addition of coenzyme q 10 on physicochemical properties of ...

In view of the increase in Saccharomyces cerevisiae mannan content, the culture condition for S.cerevisiae were optimized in this study. The influence of culture condition such as original pH, inoculum size, and temperature on mannan production were evaluated using Response surface methodology. The mathematical model was established by the quadratic rotary combination design. with the order of ...