OBJECTIVE This study aims to compare the clot stabilization on root surfaces conditioned with citric acid and ethylenediamine-tetraacetic acid (EDTA). MATERIALS AND METHODS Scaled root samples (n = 100) were set in fve groups: group I-control group (saline solution); group II (24% EDTA); group III (25% citric acid); group IV (EDTA + citric acid); group V (citric acid + EDTA). Fifty samples we...

The present study deals with the pre-treatment of sugar cane molasses for the enhanced production of citric acid by Aspergillus niger NG-4. Different metal complexing agents such as potassium ferrocyanide [K4Fe(CN)6] and ethylene diamine tetra acetic acid (EDTA) were also employed for molasses pre-treatment and the concentrations varied from 50-350 ppm. The maximum production of citric acid (36...

For evaluation of citric acid and citrate effects on bovine epididymal protoplasmic droplets, fifty bovine testes were collected in the October 2007 till June 2008 from Urmia slaughterhouse and transported to the laboratory in a cool container filled with 5 °C ice pack. Caudal epididymis was incised and sperm cells were put into Petri dishes containing hams f10 media with 10% fetal calf serum (...

There were several techniques determined for the analysis of citrate and citric acid mixtures in the pharmaceutical dosage forms. Titration methods, photometric and ion chromatographic methods were used for their determination. These methods will restrict too many factors where the accurate quantification of citrate and citric acid is extremely challenging. Citric acid is the natural flavor use...

Objective: Polyphenol oxidase or PPO (EC 1.14.18.1) is considered the enzyme responsible for quality deterioration and browning in different fruits during postharvest period. The objective of this study was to evaluate the antibrowning (inhibition of polyphenol oxidase activity) effect of Cysteine, Ascorbic acid, citric acid, kojic acid and glycine at two different pH (6 and 7) in  hawthorn. Me...

Pretreatment of mussel processing effluents for citric acid production by Aspergillus niger (CBS 262-65) in submerged culture was studied by means of an orthogonal full factorial experimental design with four independent variables: initial levels of hexacyanoferrate II, methanol, phosphate, and carbon source. The empirical model thus obtained showed the ineffectiveness of the hexacyanoferrate t...

The production of a notable and highly effective pectinase and cellulase, by the commercial baker’s yeast Saccharomyces cervisiae utilizing potato processing wastes, was achieved in 5-day solid state fermentation (SSF) cultures, at temperature 25 °C, pH range 4.0-5.0 and additive of ferric chloride. Pectinase and cellulase activities were stimulated by using potato wastes supplemented with urea...