scholarly journals Tunable Mixed Oxides: Efficient Agents for the Simultaneous Trans-Esterification of Lipids and Esterification of Free Fatty Acids from Bio-Oils for the Effective Production of Fames

2016 ◽  
pp. 1-17 ◽  
Author(s):  
Angela Dibenedetto ◽  
Antonella Angelini ◽  
Antonella Colucci ◽  
Luigi di Bitonto ◽  
Carlo Pastore ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Mixed Oxides

Catalytic Activity of Sulfated Iron-Tin Mixed Oxide for Esterification of Free Fatty Acids in Crude Palm Oil: Effects of Iron Precursor, Calcination Temperature and Sulfate Concentration

2011 ◽  
Vol 9 (1) ◽  
Author(s):  
Kamchai Nuithitikul ◽  
Worawoot Prasitturattanachai ◽  
Jumras Limtrakul
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Calcination Temperature ◽  
Mixed Oxide ◽  
Mixed Oxides ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Sulfate Concentration ◽  
Mixed Oxide Catalysts ◽  
Iron Precursor

The activities of sulfated iron-tin mixed oxide catalysts for esterification of free fatty acids in crude palm oil were investigated. The iron-tin mixed oxides were prepared from co-precipitation method when the iron content was fixed at 10 mol%. Types of iron precursor, sulfate concentration and calcination temperature were varied. The optimum study in the esterification reaction variables (stirring speed, reaction time, catalyst loading, methanol/oil molar ratio and reaction temperature) was also conducted with the best sulfated iron-tin mixed oxide catalyst. The findings show that iron sulfate is the best precursor. The activities of sulfated iron-tin mixed oxide catalysts increase with sulfate concentration. The optimum calcination temperature to prepare sulfated iron-tin mixed oxides is 450°C. The addition of iron oxide into sulfated tin oxide improves the stability of the catalyst during the reusability process. Therefore, sulfated iron-tin mixed oxide is a better candidate than sulfated tin oxide for esterification of free fatty acids. For the esterification study, the optimum reaction conditions are: the stirring speed of 250 rpm, the catalyst loading of 4.5 wt% of the oil, the methanol/oil molar ratio of 14.2, the reaction temperature of 80°C and the reaction time of 3 h.

Activity of Sulfated Aluminium-Tin Mixed Oxides for the Esterification of Free Fatty Acids in Crude Palm Oil

2014 ◽  
Vol 11 (10) ◽  
pp. 1097-1106 ◽  
Author(s):  
Kamchai Nuithitikul ◽  
Worawoot Prasitturattanachai
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Palm Oil ◽  
Mixed Oxides ◽  
Crude Palm Oil

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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