Influence of Heating Time and Metal Ions on the Amount of Free Fatty Acids and Formation Rates of Selected Carbonyl Compounds during the Thermal Oxidation of Canola Oil

2010 ◽  
Vol 58 (24) ◽  
pp. 12777-12783 ◽  
Author(s):  
Luciane Conceição Silva Bastos ◽  
Pedro Afonso de Paula Pereira
Keyword(s):  
Fatty Acids ◽  
Metal Ions ◽  
Free Fatty Acids ◽  
Thermal Oxidation ◽  
Canola Oil ◽  
Carbonyl Compounds ◽  
Heating Time

scholarly journals Synthesis of polyhydroxyalkanoates (PHAs) from vegetable oils and free fatty acids by wild-type and mutant strains of Pseudomonas chlororaphis

2017 ◽  
Vol 63 (12) ◽  
pp. 1009-1024 ◽  
Author(s):  
Parveen K. Sharma ◽  
Riffat I. Munir ◽  
Teresa de Kievit ◽  
David B. Levin
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Vegetable Oils ◽  
Canola Oil ◽  
Octanoic Acid ◽  
Carbon Sources ◽  
Nonanoic Acid ◽  
Pseudomonas Chlororaphis ◽  
Wide Range ◽  
Pha Production

Pseudomonas chlororaphis PA23 was isolated from soybean roots as a plant-growth-promoting rhizobacterium. This strain secretes a wide range of compounds, including the antibiotics phenazine-1-carboxylic acid (PCA), pyrrolnitrin, and 2-hydroxyphenazine. We have determined that P. chlororaphis PA23 can synthesize medium-chain-length polyhydroxyalkanoate (PHA) polymers utilizing free fatty acids, such as octanoic acid and nonanoic acid, as well as vegetable oils as sole carbon sources. Genome analysis identified a pha operon containing 7 genes in P. chlororaphis PA23 that were highly conserved. A nonpigmented strain that does not synthesize PCA, P. chlororaphis PA23-63, was also studied for PHA production. Pseudomonas chlororaphis PA23-63 produced 2.42–5.14 g/L cell biomass and accumulated PHAs from 11.7% to 32.5% cdm when cultured with octanoic acid, nonanoic acid, fresh canola oil, waste canola fryer oil, or biodiesel-derived waste free fatty acids under batch culture conditions. The subunit composition of the PHAs produced from fresh canola oil, waste canola fryer oil, or biodiesel-derived free fatty acids did not differ significantly. Addition of octanoic acid and nonanoic acid to canola oil cultures increased PHA production, but addition of glucose did not. PHA production in the phz mutant, P. chlororaphis PA23-63, was greater than that in the parent strain.

scholarly journals Ultrasonic free fatty acids esterification in tobacco and canola oil

2014 ◽  
Vol 21 (6) ◽  
pp. 1969-1975 ◽  
Author(s):  
D.C. Boffito ◽  
F. Galli ◽  
C. Pirola ◽  
C.L. Bianchi ◽  
G.S. Patience
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Canola Oil

scholarly journals Removing Products of Thermal Degradation from Edible Oils by Zeolite and by Clinoptilolite - Comparison of Results

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Sanja Dobrnjac ◽  
Ljubica Vasiljević ◽  
Stevan Blagojević ◽  
Miladin Gligorić ◽  
Zoran Obrenović ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Thermal Degradation ◽  
Free Fatty Acids ◽  
Chemical Reactions ◽  
Edible Oils ◽  
Heating Time ◽  
Acid Number ◽  
Peroxide Number ◽  
Zeolite 4A ◽  
Temperature Heating

When edible oils are heated above 150°C, they undergo thermo-oxidative changes depending on a variety of factors, such as temperature, heating time, type of oil, etc. These changes cause a series of chemical reactions (hydrolysis, oxidation, polymerization, etc.) resulting in the formation of free fatty acids, an increase in the peroxide number and the acid number, a change of color and a decrease in the iodine number. This study investigates changes of the content of free fatty acids, the acid number, and the peroxide number in edible sunflower oil when heating at the temperature range from 110°C to 190°C for 30 minutes, as well as after the adsorption by a natural and a synthetic adsorbent (clinoptilolite and zeolite 4A). The results of the research show that these adsorbents are effective in removing the products of chemical reactions occurring in thermal degradation, which is particularly evident after the adsorption of oil heated at 190°C. Somewhat better results were achieved after the adsorption using clinoptilolite, with a 72 % reduction in the content of free fatty acids, 83 % reduction in the acid number, and 43 % reduction in the peroxide number. After the adsorption by zeolite 4A, the content of free fatty acids was reduced by 65%, the acid number by 76 %, and the peroxide number by 39 %. The results obtained open the possibilities of further research aiming at discovering the adsorbents which would be most suitable for the regeneration of used edible oils, after which they could be applied safely for different purposes.

GENERAL EFFECTS OF α-MELANOCYTE STIMULATING HORMONE IN THE RABBIT

1965 ◽  
Vol 48 (4) ◽  
pp. 609-618 ◽  
Author(s):  
H. K. Dyster-Aas ◽  
C. E. T. Krakau
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Serum Calcium ◽  
Calcium Level ◽  
Serum Calcium Level ◽  
Systemic Effects ◽  
List Type ◽  
Aqueous Flare ◽  
Melanocyte Stimulating Hormone ◽  
Blood Aqueous Barrier

ABSTRACT In addition to the previously described permeability disturbance in the blood aqueous barrier of the eye, measured as an increase of the aqueous flare, a series of transitory systemic effects have been recorded following the subcutaneous injection of synthetic α-MSH: marked increase of the free fatty acids in plasma, decrease in the serum calcium level, decrease in the blood pressure, increase in the skin temperature, increased frequency and diminished amplitude of respiration, presence of slow waves in the EEG. There is a correlation between the magnitude of the aqueous flare increase and the increase of free fatty acids in plasma and also between the aqueous flare and the minimum serum calcium level.

The Relationship of Fasting Free Fatty Acids, Adipose Tissue, Insulin Resistance, and Fasting Glucose Concentrations with Subsequent ß-Cell Function in Nondiabetic Subjects

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 1812-P
Author(s):  
MARIA D. HURTADO ◽  
J.D. ADAMS ◽  
MARCELLO C. LAURENTI ◽  
CHIARA DALLA MAN ◽  
CLAUDIO COBELLI ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Fatty Acids ◽  
Adipose Tissue ◽  
Free Fatty Acids ◽  
Cell Function ◽  
Fasting Glucose ◽  
Relationship Of ◽  
The Relationship

1010-P: Effects of MEDI0382, an Oxyntomodulin-Like Peptide with Targeted GLP-1/Glucagon Receptor Activity, on Amino Acids, Ketones, and Free Fatty Acids

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 1010-P
Author(s):  
VICTORIA E. PARKER ◽  
DARREN ROBERTSON ◽  
TAO WANG ◽  
DAVID C. HORNIGOLD ◽  
MAXIMILIAN G. POSCH ◽  
...  
Keyword(s):  
Amino Acids ◽  
Fatty Acids ◽  
Free Fatty Acids ◽  
Receptor Activity ◽  
Glucagon Receptor
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