The oxidation of progesterone under GoAggIII conditions

1991 ◽  
Vol 56 (5) ◽  
pp. 984-990 ◽  
Author(s):  
Derek H. R. Barton ◽  
Dario Doller
Keyword(s):  
Hydrogen Peroxide ◽  
Acetic Acid ◽  
Acid Solution ◽  
Ferric Chloride ◽  
Picolinic Acid ◽  
Acetic Acid Solution ◽  
Major Product ◽  
Aqueous Hydrogen Peroxide ◽  
Ring Contraction ◽  
The Third

The oxidation of pregn-4-ene-3,20-dione (progesterone) by the GoAggIII system (aqueous hydrogen peroxide, ferric chloride, picolinic acid in pyridine-acetic acid solution) has been investigated. Two tri-keto derivatives were isolated and identified as pregn-4-ene-3,6,20-trione and pregn-4-ene-3,12,20-trione. The third major product isolated was identified as the unstable 5α-formyl-A-nor-pregnane-3,20-dione, which deformylated spontaneously to A-nor-5β-pregnane-3,20-dione. A mechanism for the A-ring contraction is proposed, based upon the participation of a carbon-Fe(V) intermediate.

scholarly journals Fatty acid composition of meat of slaughtered animals in case of treatment with washing and disinfectants

2020 ◽  
pp. 5-17
Author(s):  
N. M. Bogatko ◽  
Keyword(s):  
Hydrogen Peroxide ◽  
Fatty Acids ◽  
Acetic Acid ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Solution ◽  
Potassium Permanganate ◽  
Acetic Acid Solution ◽  
Fresh Meat ◽  
Goat Meat

During the production and circulation of safe and high-quality meat of slaughtered animals, state veterinary inspectors must carry out risk-oriented control over the detection of detergents and disinfectants due to violation of terms and conditions using patented express methods with a reliability of up to 99.9 %. Studies have shown the fatty acid composition of the meat of slaughtered animals of various qualities, including treatment with detergents and disinfectants. It was found that the content of saturated fatty acids in beef of dubious freshness increased by 2.12 %, and during the treatment of beef with solutions of formaldehyde (10 %) and chlorine decreased by 6.76 % and 4.63 %, respectively; in pork of dubious freshness, and treated with a solution of hydrogen peroxide (5 %) and detergents and disinfectants probably increased (p≤0,001) by 5.82 %, 9.11 % and 10.53 %; in mutton of dubious freshness and treated with a solution of potassium permanganate (5 %) was probably (p≤0,001) reduced by 9.76 % and 2.11 %; in goat meat of questionable freshness and treated with acetic acid solution (10 %) was probably (p≤0.001) increased by 3.10 % and 6.44 % compared to the control (fresh meat). The content of unsaturated fatty acids in beef of dubious freshness was slightly reduced by 2.30 % (p≤0.001), and in beef treated with formaldehyde and chlorine solutions slightly increased by 7.32 % (p≤0.001) and 5.01 % (p≤0.001), respectively; in pork of questionable freshness and questionable freshness treated with a solution of hydrogen peroxide (5 %) and detergents and disinfectants, it probably decreased (p≤0.001) by 4.42 %, 6.92 % and 8.00 %, respectively; in mutton of dubious freshness and treated with a solution of potassium permanganate (5 %) was probably (p≤0,001) increased by 11.82 % and 2.56 %, respectively; in goat meat of questionable freshness and treated with acetic acid solution (10 %) was probably (p≤0.001) reduced by 3.27 % and 6.81 % compared to the control (fresh meat). The ratio of UFA/SFA in beef of questionable freshness was lower by 4.33 %, in beef treated with solutions of formaldehyde (10 %) and chlorine was higher by 15.05 and 10.08 %, and the ratio Σ ω-6/Σ ω-3 decreased in beef of dubious freshness by 31.45 % (p≤0.001), in beef treated with chlorine solution by 19.65 % (p≤0.001), and in beef treated with formaldehyde solution (10 %) increased by 31.91% (p≤0.001); UFA/SFA in pork of doubtful freshness, doubtful freshness treated with hydrogen peroxide solution (5 %) and detergents and disinfectants significantly decreased (p≤0.001) by 9.65 %, 14.67 % and 16.79 %, and the ratio Σω-6/Σω-3 decreased (p≤0,001) in the studied samples of pork of different quality by 72.45 %, 26.93 % and 39.49 %; UFA/SFA in mutton of questionable freshness and treated with potassium permanganate solution (5 %) increased by 23.80 % (p≤0.001) and 4.72 %, (p≤0.001), and the ratio Σ ω-6/Σ ω-3 decreased by 0.07 % and 13.52 % (p≤0.001); UFA/SFA in goat meat of doubtful freshness and treated with acetic acid solution (10 %) was reduced (p≤0.001) by 6.32 % and 12.63 %, and the ratio of Σω-6/Σω-3 in goat meat of doubtful freshness increased by 50.33 % (p≤0.001), and in goat meat treated with acetic acid solution (10 %) ‒ decreased by 26.42 % (p≤0.001) in the studied samples, and compared to the control. The softness index in beef of dubious freshness was slightly increased ‒ 0.681±0.015, but with a softened effect on the meat of chemical reagents solutions of formaldehyde (10 %) and chlorine, this figure increased by 1.08 times (0.731±0.017) and 1.05 times (0.715±0.016); in pork of dubious freshness decreased slightly ‒ 0.864±0.007, and in pork treated with a solution of hydrogen peroxide (5 %) and detergents and disinfectants was probably reduced (p≤0.001) 1.05 times (0.831±0.006) and 1.16 times (0.752±0.005); in mutton of dubious freshness slightly increased by 1.10 times (0.803±0.005) (p≤0.001), and in mutton treated with a solution of potassium permanganate (5 %) decreased by 1.03 times (0.710±0.005) (p≤0.001) due to the tanning and drying action of potassium permanganate; in goat meat of dubious freshness and treated with a solution of acetic acid (10 %) decreased 1.09 times (0.792±0.003) and 1.07 times (0.811±0.006) due to the oxidizing effect of acetic acid on muscle tissue.

AUTOXIDATION REACTIONS CATALYZED BY COBALT ACETATE BROMIDE

1965 ◽  
Vol 43 (5) ◽  
pp. 1306-1317 ◽  
Author(s):  
Allan S. Hay ◽  
Harry S. Blanchard
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Carboxylic Acids ◽  
Atmospheric Pressure ◽  
Active Catalyst ◽  
Acetic Acid Solution ◽  
Cobalt Acetate ◽  
Major Product ◽  
High Yields

Cobalt acetate bromide in acetic acid solution is an extraordinarily active catalyst for the autoxidation of hydrocarbons. Carboxylic acids and ketones are readily prepared in high yields at moderate temperatures and at atmospheric pressure. In addition, benzylic and allylic groups can be converted to esters of the corresponding alcohols, and the oxidation of tetralin can be controlled to give either α-tetralone or 1,2-dihydronaphthalene as the major product. A mechanism for these reactions is postulated.

Some Approaches to Viscometric Study of Chitosan in Acetic Acid Solution

2016 ◽  
Vol 10 (2) ◽  
pp. 135-139 ◽  
Author(s):  
Valentina Chernova ◽  
◽  
Angela Shurshina ◽  
Elena Kulish ◽  
Gennady Zaikov ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Intrinsic Viscosity ◽  
Acetic Acid Solution ◽  
Conformational State ◽  
Macromolecular Coil ◽  
Degree Of Swelling ◽  
Current Value ◽  
Viscometric Study

Some ways of estimating the values of the intrinsic viscosity of chitosan were analyzed. It was shown that the method of Irzhak and Baranov for estimating the current value of the intrinsic viscosity allows to adequately estimates the conformational state of the macromolecular coil and its degree of swelling.

Compatibility studies of chitosan/PVA blend in 2% aqueous acetic acid solution at 30°C

2010 ◽  
Vol 82 (2) ◽  
pp. 251-255 ◽  
Author(s):  
H.M.P. Naveen Kumar ◽  
M.N. Prabhakar ◽  
C. Venkata Prasad ◽  
K. Madhusudhan Rao ◽  
T.V. Ashok Kumar Reddy ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Acetic Acid Solution ◽  
Aqueous Acetic Acid ◽  
Compatibility Studies ◽  
Aqueous Acetic Acid Solution

The Action of Platinum on Cholesterol in Acetic Acid Solution

1944 ◽  
Vol 66 (10) ◽  
pp. 1752-1755 ◽  
Author(s):  
Herbert S. Anker ◽  
Konrad Bloch
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Acetic Acid Solution
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