Decarboxylation of mercury salts of organic acids under the action of peroxides and ultraviolet radiation

1966 ◽  
Vol 15 (7) ◽  
pp. 1127-1132 ◽  
Author(s):  
Yu. A. Ol'dekop ◽  
N. A. Maier
Keyword(s):  
Ultraviolet Radiation ◽  
Organic Acids ◽  
Salts Of Organic Acids ◽  
Mercury Salts

Effect of Certain Metallic Salts on the Aging of a Tread Compound

1928 ◽  
Vol 1 (1) ◽  
pp. 97-100
Author(s):  
Bert S. Taylor ◽  
Webster N. Jones
Keyword(s):  
Organic Acids ◽  
Copper Chloride ◽  
Natural Aging ◽  
Test Strips ◽  
Low Concentrations ◽  
Metallic Salts ◽  
Salts Of Organic Acids ◽  
Mercury Salts ◽  
Effects Of Aging ◽  
Manganese Salts

Abstract The effect on aging produced by the addition of low concentrations of iron, copper, manganese, and mercury salts of higher aliphatic organic acids to a tread compound was investigated. The data obtained from aging in the bomb show that the presence of copper and manganese salts of organic acids in very small concentrations is harmful to the aging of rubber. As little as 0.1 per cent of either cupric stearate or manganic oleate is detrimental. Iron stearate has a less deleterious effect, but 0.5 per cent iron stearate produced much poorer aging than the blank. The mercury salts in the concentrations used—0.1 to 1.0 per cent—did not affect the aging so noticeably as the other salts. The effects of aging in the Bierer-Davis bomb and in the Geer oven are markedly different, both as to tensile strength and the hardening of the test strips. The bomb test at 70° C. was much more severe than the oven test at the same temperature. Further investigation will be made to determine which type of artificial aging test most nearly corresponds to the natural aging of these stocks. The presence of copper chloride on the surface of the test strips exerts a deteriorating influence on the stock in the aging bomb. The effect is similar to that obtained when copper stearate is compounded into the stock.

Proflavine binding and release by sensitive and resistant Bacillus subtilis

1970 ◽  
Vol 16 (10) ◽  
pp. 973-981
Author(s):  
Gy. Barabas ◽  
B. M. Mehta ◽  
D. J. Kushner
Keyword(s):  
Escherichia Coli ◽  
Bacillus Subtilis ◽  
Organic Acids ◽  
Resistant Strain ◽  
Binding Capacity ◽  
Sensitive Strain ◽  
Growth Media ◽  
Sodium Salts ◽  
Salts Of Organic Acids ◽  
Resistant Cells

Proflavine binding of a sensitive strain of Bacillus subtilis and of a resistant strain derived from it was compared. Proflavine was bound very rapidly and more was bound at 0 °C than at 37 °C. Boiling increased the proflavine-binding capacity at 37 °C of sensitive but not of resistant cells. The binding capacity of sensitive and resistant cells suspended in buffer was the same; this was also true in various growth media. If cells were able to grow in the presence of proflavine their proflavine content decreased.Bound proflavine was released when cells were treated with growth media or with the salts of growth media. Sodium salts of organic acids also caused a release. This effect seemed due to their Na+ content, and was somewhat higher for resistant than for sensitive cells. The mechanism of proflavine resistance in B. subtilis is probably different from that of Escherichia coli, which is thought to depend on an energy-driven release of bound proflavine.

Effect of Metallic Poisons. Especially Manganese, on Aging of Vulcanized Natural Rubber

1947 ◽  
Vol 20 (3) ◽  
pp. 821-826
Keyword(s):  
Organic Acids ◽  
Natural Rubber ◽  
Harmful Effect ◽  
Manganese Compound ◽  
Naturally Occurring ◽  
Different Types ◽  
Salts Of Organic Acids ◽  
General Experience ◽  
Manganese Compounds ◽  
Harmful Effects

Abstract 1. Information received from rubber manufacturers on their experience of the effects of manganese and copper on aging is summarized. Although there is evidence that the amounts of these impurities in fillers tended to increase during the early war years (1939–42), it seems to be the general experience that little trouble arose from their effects on the properties of the rubber. Fillers containing as much as 0.05–0.10 per cent of manganese, or 0.005 per cent of copper, have not shown any obvious harmful effects. 2. Experiments with a large number of manganese compounds, including naturally occurring (mineral) forms and salts of organic acids, used in amounts equivalent to 0.01 per cent manganese on the raw rubber, have failed to show any pronounced harmful effect on the aging (oven or oxygen bomb) of a vulcanized natural rubber containing mercaptobenzothiazole, although deterioration was noticeably accelerated in some cases. Probably on account of the smallness of the effects observed, it is not possible as yet to draw any conclusion as to the relative activities of different types of manganese compound. 3. According to results of previous workers, manganese in the amount used in the present experiments can produce a more serious effect than these experiments indicate. The effect of manganese is known to depend on the type of mix used, and this aspect of the problem would thus appear to merit further investigation, as does also the influence of the method and degree of dispersion of the manganese compound in the rubber mix.

A Quinonoid Structure for Hydroquinone Pyridinium Salts of Organic Acids

Nature ◽  
1949 ◽  
Vol 163 (4145) ◽  
pp. 565-566 ◽  
Author(s):  
ABDEL FATTAH ALY ISMAIL
Keyword(s):  
Organic Acids ◽  
Pyridinium Salts ◽  
Salts Of Organic Acids

Effect of dietary supplementation of salts of organic acids on gut morphology and meat quality of broilers

2017 ◽  
Author(s):  
Vinus Vinus ◽  
M. A. Akbar ◽  
B. S. Tewatia ◽  
Sushil Kumar
Keyword(s):  
Organic Acids ◽  
Meat Quality ◽  
Control Diet ◽  
Feed Additives ◽  
Metabolizable Energy ◽  
Coliform Bacteria ◽  
Control Group ◽  
Gut Morphology ◽  
Salts Of Organic Acids

The present investigation was conducted to appraise the effect of different levels of salts of organic acids on the gut morphology and meat quality of broilers. A total 300 day-old commercial chicks were randomly divided into 5 treatments. Each treatment consists of 6 replicates having 10 birds per replicate. The control diet was formulated to contain approximately the same metabolizable energy (ME), crude protein and limiting amino acids (methionine and lysine) as per the requirements of birds. The first group (T1) was fed on control diet without any feed additives, while, groups (T2, T3, T4 and T5) were fed on basal diets containing sodium butyrate and calcium propionate @ 0.5% and 1.0% respectively. Six birds from each treatment (1 per replication) were randomly selected for slaughter and collection of samples and microbial study at day 42. Performance of birds in terms of body weight and feed conversion ratio was significantly improved in treated groups. Results showed that in gut morphology, pH was reduced significantly (P less than 0.05) in T3 and T5 (6.24 and 6.22, respectively) as compared to the control group (6.64) while significant improvement was observed in villus height and crypt depth in all treatment groups and were highest in T3 (539.50µm,135.67 µm). Lowest Coliform bacteria (log CFU/g.)was recorded in T3 (16.57) which was significantly differ with the T1 (19.17) and Lactobacilli count was significantly increased in all treatments as compared to control.Supplementation of organic acids reduced meat cholesterol level significantly and lowest was in T5(48.03mg/dL) followed by T3 (48.30mg/dL). Similarly SFA decreased while PUFA content was increased significantly on supplementation of salts as compared to control.

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