scholarly journals Sonocrystallization of Interesterified Fats with 20 and 30% of Stearic Acid at the sn-2 Position and Their Physical Blends

2017 ◽  
Vol 94 (8) ◽  
pp. 1045-1062 ◽  
Author(s):  
Jeta V. Kadamne ◽  
Ebenezer A. Ifeduba ◽  
Casimir C. Akoh ◽  
Silvana Martini
Keyword(s):  
Stearic Acid ◽  
Interesterified Fats

scholarly journals Triacylglycerol structure and interesterification of palmitic and stearic acid-rich fats: an overview and implications for cardiovascular disease

2009 ◽  
Vol 22 (1) ◽  
pp. 3-17 ◽  
Author(s):  
Sarah E. E. Berry
Keyword(s):  
Fatty Acids ◽  
Stearic Acid ◽  
Physical Properties ◽  
Physical Characteristics ◽  
Human Infant ◽  
Postprandial Lipaemia ◽  
Human Adults ◽  
Commercially Important ◽  
Interesterified Fats ◽  
Acute And Chronic Effects

The position of fatty acids in the TAG molecule (sn-1,sn-2 andsn-3) determines the physical properties of the fat, which affects its absorption, metabolism and distribution into tissues, which may have implications for the risk of CHD. The TAG structure of fats can be manipulated by the process of interesterification, which is of increasing commercial importance, as it can be used to change the physical characteristics of a fat without the generation oftrans-fatty acids. Interesterified fats rich in long-chain SFA are commercially important, but few studies have investigated their health effects. Evidence from animal and human infant studies suggests that TAG structure and interesterification affect digestibility, atherogenicity and fasting lipid levels, with fats containing palmitic and stearic acid in thesn-2 position being better digested and considered to be more atherogenic. However, chronic studies in human adults suggest that TAG structure has no effect on digestibility or fasting lipids. The postprandial effects of fats with differing TAG structure are better characterised but the evidence is inconclusive; it is probable that differences in the physical characteristics of fats resulting from interesterification and changes in TAG structure are key determinants of the level of postprandial lipaemia, rather than the position of fatty acids in the TAG. The present review gives an overview of TAG structure and interesterified palmitic and stearic acid-rich fats, their physical properties and their acute and chronic effects in human adults in relation to CHD.

Abstract 207: Interesterified Fat Rich in Stearic Acid Increases Liver Neutrophil and M1 Macrophage Infiltration and Induces Nonalcoholic Steatohepatitis

2014 ◽  
Vol 34 (suppl_1) ◽  
Author(s):  
Maria Silvia F Lavrador ◽  
Milessa S Afonso ◽  
Marcia Koike ◽  
Dennys E Cintra ◽  
Renata P Bombo ◽  
...  
Keyword(s):  
Stearic Acid ◽  
Total Cholesterol ◽  
Plasma Lipids ◽  
Plasma Cholesterol ◽  
Total Plasma Cholesterol ◽  
Dietary Intakes ◽  
Total Plasma ◽  
M1 Macrophage ◽  
Interesterified Fats ◽  
Classically Activated

Introduction: interesterified fats, rich in saturated fatty acid, have been used by food industry to replace trans. Palmitic acid is the most common dietary fat with known deleterious effects. On the hand stearic acid which is consumed in a low amount, has neutral effect on plasma lipids. Unlike vegetable oils, interesterified fats contain palmitic or stearic acid in the sn-2 position and the positional compositon of triglicerides may regulate its metabolic fate. Thus, the aim of this study was to evaluate the effect on the liver metabolism of the interesterified fats rich in stearic or palmitic fatty acids. Methods: Weaning LDLr-KO male mice were randomly distributed into five groups fed a high fat diet (40% of energy as fat) containing polyunsaturated (PUFA), palmitic (PALM), palmitic interesterified (PALM INTER), stearic (STEAR) or stearic interesterified (STEAR INTER) during 16 weeks. Total plasma cholesterol and triglyceride concentrations, liver total cholesterol, triglycerides and weight, neutrophil (neutr/area) and classically activated/inflammatory M1(CD11b) infiltrated macrophage were determined. Histological markers of NAFLD activity were assessed. Results: There were no differences in dietary intakes among all groups. The interesterification process did not alter plasma lipids concentrations (mg/dL±SD): PALM vs PALM INTER (499.2 ± 81.7 vs 526.8 ± 92.6) and STEAR vs STEAR INTER (342.6 ± 89.9 vs 363.9 ± 90.0). However, PALM and PALM INTER presented higher total plasma cholesterol, and STEAR and STEAR INTER showed total cholesterol concentrations similar to POLI (320.7±47.4). Liver weight, cholesterol and TG contents did not differ among the groups. POLI and STEARIC groups do not elicit NASH (score <3), PALM and PALM INTER presented intermediate stage (score ≤4) between STEARIC/POLI and STEARIC INTER. Nevertheless, STEAR INTER developed NASH (score ≥5), and induce higher neutrophil infiltration (5.53 ±4.1) as compared to all other groups. The M1 macrophage classically activated infiltration was also higher in STEAR INTER group than in all groups as demonstrated by imunofluorescence. Conclusion: STEAR INTER brings on NASH lesion, increased neutrophil and M1 macrophage classically activated/inflammatory infiltration in the liver.

Synthesis of O-(2-Deoxy-2-stearoylamino-β-D-glucopyranosyl)-(1→4)-N-acetylnormuramoyl-L-α-aminobutanoyl-D-isoglutamine, a Lipophilic Disaccharide Analogue of MDP

1992 ◽  
Vol 57 (3) ◽  
pp. 579-589 ◽  
Author(s):  
Miroslav Ledvina ◽  
David Šaman ◽  
Jan Ježek
Keyword(s):  
Stearic Acid ◽  
Benzyl Ester ◽  
Barium Hydroxide ◽  
High Yield

Partial N-deacetylation of compound II with barium hydroxide afforded benzyl 2-acetamido-3-O-allyl-4-O-(2-amino-2-deoxy-4,6-O-isopropylidene-β-D-glucopyranosyl)-6-O,-benzyl-2-deoxy-α-D-glucopyranoside (III) in high yield. Compound III was N-acylated with stearic acid in the presence of DCC and the obtained product was converted into benzyl 2-acetamido-6-O-benzyl-3-O-carboxymethyl-2-deoxy-4-O-(3,4,6-tri-O-benzyl-2-deoxy-2-stearoylamino-β-D-glucopyranosyl)-α-D-glucopyranoside (VII). Coupling of compound VII with L-α-aminobutanoyl-D-isoglutamine benzyl ester followed by hydrogenolysis of the product VIII afforded compound IX.

scholarly journals A Superhydrophobic, Antibacterial, and Durable Surface of Poplar Wood

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1885
Author(s):  
Xinyu Wu ◽  
Feng Yang ◽  
Jian Gan ◽  
Zhangqian Kong ◽  
Yan Wu
Keyword(s):  
Stearic Acid ◽  
Antibacterial Properties ◽  
Alkali Resistance ◽  
Poplar Wood ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Temperatures ◽  
Acid And Alkali Resistance ◽  
The Stability

The silver particles were grown in situ on the surface of wood by the silver mirror method and modified with stearic acid to acquire a surface with superhydrophobic and antibacterial properties. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray energy spectroscopy (XPS) were used to analyze the reaction mechanism of the modification process. Scanning electron microscopy (SEM) and contact angle tests were used to characterize the wettability and surface morphology. A coating with a micro rough structure was successfully constructed by the modification of stearic acid, which imparted superhydrophobicity and antibacterial activity to poplar wood. The stability tests were performed to discuss the stability of its hydrophobic performance. The results showed that it has good mechanical properties, acid and alkali resistance, and UV stability. The durability tests demonstrated that the coating has the function of water resistance and fouling resistance and can maintain the stability of its hydrophobic properties under different temperatures of heat treatment.

Sign in / Sign up

Export Citation Format

Share Document