Sodium propionate

About: Sodium propionate is a research topic. Over the lifetime, 463 publications have been published within this topic receiving 9451 citations. The topic is also known as: E281 & sodium propionate anhydrous.

Immediate reduction of Salmonella enterica serotype typhimurium viability via membrane destabilization following exposure to multiple-hurdle treatments with heated, acidified organic acid salt solutions.

Abstract: The antimicrobial activity of organic acids in combination with nonchemical treatments was evaluated for inactivation of Salmonella enterica serotype Typhimurium within 1 min. It was observed that the effectiveness of the multiple-hurdle treatments was temperature (P ≤ 0.05) and pH (P ≤ 0.05) dependent and corresponded to the degree of organic acid lipophilicity (sodium acetate being least effective and sodium propionate being the most effective). This led to the hypothesis that the loss in viability was due at least in part to cell membrane disruption. Evaluation of osmotic response, potassium ion leakage, and transmission electron micrographs confirmed treatment effects on the cell membrane. Interestingly, all treatments, even those with no effect on viability, such as with sodium acetate, resulted in measurable cellular stress. Microarray experiments explored the specific response of S. Typhimurium to sodium acetate and sodium propionate, the most similar of the tested treatments in terms of pKa and ionic strength, and found little difference in the changes in gene expression following exposure to either, despite their very different effects on viability. Taken together, the results reported support our hypothesis that treatment with heated, acidified, organic acid salt solutions for 1 min causes loss of S. Typhimurium viability at least in part by membrane damage and that the degree of effectiveness can be correlated with lipophilicity of the organic acid. Overall, the data presented here indicate that a combined thermal, acidified sodium propionate treatment can provide an effective antimicrobial treatment against Salmonella.

Electrokinetic potentials. xi. the effect of sodium soaps on the electric moment of the double layer at an aqueous‐cellulose interface

Abstract: 1. Electrokinetic studies of aqueous solutions of sodium formate, sodium acetate, sodium propionate, sodium butyrate, sodium caprylate, sodium oleate and sodium oxalate have been conducted at a cellulose interface with the streaming potential technique.2. It is suggested that in interest of clearness and accuracy the attempt to express electrokinetic data in terms of ``potentials'' be abandoned and that the electric moment of the double layer, which does not require a knowledge of the magnitude of the dielectric constant, be substituted for ζ.3. It is indicated that after the fourth carbon atom has been added the electric moment of the double layer is essentially a constant.4. It is noted that there is no correspondence between the ionization constant of the fatty acid from which the soap is derived and its effect on the electrokinetic conditions at the interface. This indicates that hydrolysis and the resulting OH ion plays a minor role.5. It is pointed out that the electric moment of the double layer in...

The effect of sucrose supplementation on kinetics of nitrogen, ruminal propionate and plasma glucose in sheep

Abstract: The effects of dietary sucrose on the metabolic rate of plasma glucose and ruminal propionate as well as the change in nitrogen kinetics were examined in four mature wethers fitted with rumen fistulas in Tsukuba, Japan in 1990. Wethers were fed at 12 equal intervals daily on crushed lucerne hay cubes (1233 g DM/day), with or without 204 g/day of sucrose. Plasma urea and glucose kinetics were determined following a single intravenous injection of [ 15 N]urea and [U- 13 C]glucose respectively ; and the kinetics of ruminal ammonia and propionate were determined following a single intraruminal injection of [ 15 N]ammonium chloride and [2- 13 C]sodium propionate respectively. Following supplementation of sucrose to the diet, nitrogen retention was increased (P < 0.05) with a decrease in plasma urea concentration (P < 0.05) and urinary urea excretion (P < 0.05). Sucrose supplementation decreased (P < 0.05) the concentration and irreversible loss rate of ruminal ammonia. Urinary allantoin excretion did not change with sucrose treatment, but the flow rate of non-ammonia-nitrogen from the rumen was increased (P < 0.05). The transfer rate of ruminal ammonia to plasma urea was also decreased (P < 0.01), whilst the transfer rate of plasma urea to ruminal ammonia was increased (P < 0.05) by dietary sucrose. Sucrose supplementation resulted in a higher concentration of propionate and butyrate (P < 0.05) in the rumen with no significant change in acetate or pH. The concentration of plasma glucose did not change with sucrose treatment, but the concentration of insulin, pool size (P < 0.05) and the irreversible loss rate of glucose (P < 0.01) were increased, reflecting the increase in the production rate of ruminal propionate (P < 0.05). It was concluded that the supplementation of sucrose affected the metabolism of urea and glucose in plasma via a change in ruminal production rate of ammonia and propionate, respectively.