scholarly journals Adsorption of Oleate Anions on to Cationized Lignocelluloses

2002 ◽  
Vol 20 (6) ◽  
pp. 555-563 ◽  
Author(s):  
H. Zghida ◽  
M.H.V. Baouab ◽  
R. Gauthier
Keyword(s):  
Oleic Acid ◽  
Aqueous Solutions ◽  
Olive Oil ◽  
Quaternary Ammonium ◽  
Ionic Interactions ◽  
Lignocellulosic Materials ◽  
Wood Sawdust ◽  
Cotton Fibres ◽  
Partial Desorption ◽  
Hcl Solution

Oleic acid and its salts are present among the toxic pollutants in olive oil mill wastewaters. Four lignocellulosic materials modified by grafting quaternary ammonium groups have been tested for the adsorption of the oleate anion from aqueous solutions, viz. cotton fibres, viscose fabric, wood sawdust and maize cob powder. As a result of their strong ionic interactions, the carboxylate moities were entrapped at a rate equivalent to the ammonium content of the support. Furthermore, when this charged support was left in contact with the polluted solution without agitation, an additional quantity of pollutant was adsorbed due to associations by the hydrophobic tails of the oleate moities. Partial desorption was achieved in 1 M HCl solution.

scholarly journals Additive Regulation of Adiponectin Expression by the Mediterranean Diet Olive Oil Components Oleic Acid and Hydroxytyrosol in Human Adipocytes

PLoS ONE ◽  
2015 ◽  
Vol 10 (6) ◽  
pp. e0128218 ◽  
Author(s):  
Egeria Scoditti ◽  
Marika Massaro ◽  
Maria Annunziata Carluccio ◽  
Mariangela Pellegrino ◽  
Martin Wabitsch ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Olive Oil ◽  
Mediterranean Diet ◽  
Human Adipocytes ◽  
Oil Components ◽  
The Mediterranean

Modified Na-Montmorillonite With Quaternary Ammonium Salts: Application for Removal of Salicylic Acid From Aqueous Solutions

2015 ◽  
Vol 43 (8) ◽  
pp. 1150-1156 ◽  
Author(s):  
Zilin Meng ◽  
Fengzhu Lv ◽  
Yihe Zhang ◽  
Qian Zhang ◽  
Zhilei Zhang ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Aqueous Solutions ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts

Effects of olive oil and its minor constituents on serum lipids, oxidative stress, and energy metabolism in cardiac muscle

2006 ◽  
Vol 84 (2) ◽  
pp. 239-245 ◽  
Author(s):  
Luciane A. Faine ◽  
Hosana G. Rodrigues ◽  
Cristiano M. Galhardi ◽  
Geovana M.X. Ebaid ◽  
Yeda S. Diniz ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oleic Acid ◽  
Energy Metabolism ◽  
Olive Oil ◽  
Cardiac Muscle ◽  
Serum Lipids ◽  
Virgin Olive Oil ◽  
Density Lipoprotein ◽  
Protein Carbonyl ◽  
Lipid Hydroperoxides

Recent lines of evidence suggest that the beneficial effects of olive oil are not only related to its high content of oleic acid, but also to the antioxidant potential of its polyphenols. The aim of this work was determine the effects of olive oil and its components, oleic acid and the polyphenol dihydroxyphenylethanol (DPE), on serum lipids, oxidative stress, and energy metabolism on cardiac tissue. Twenty four male Wistar rats, 200 g, were divided into the following 4 groups (n = 6): control (C), OO group that received extra-virgin olive oil (7.5 mL/kg), OA group was treated with oleic acid (3.45 mL/kg), and the DPE group that received the polyphenol DPE (7.5 mg/kg). These components were administered by gavage over 30 days, twice a week. All animals were provided with food and water ad libitum The results show that olive oil was more effective than its isolated components in improving lipid profile, elevating high-density lipoprotein, and diminishing low-density lipoprotein cholesterol concentrations. Olive oil induced decreased antioxidant Mn-superoxide dismutase activity and diminished protein carbonyl concentration, indicating that olive oil may exert direct antioxidant effect on myocardium. DPE, considered as potential antioxidant, induced elevated aerobic metabolism, triacylglycerols, and lipid hydroperoxides concentrations in cardiac muscle, indicating that long-term intake of this polyphenol may induce its undesirable pro-oxidant activity on myocardium.

Removal of EDTA from Aqueous Solutions Using Activated Carbon Prepared from Rubber Wood Sawdust: Kinetic and Equilibrium Modeling

2010 ◽  
Vol 38 (4) ◽  
pp. 361-369 ◽  
Author(s):  
K. Anoop Krishnan ◽  
K. G. Sreejalekshmi ◽  
Sumol Varghese ◽  
T. S. Anirudhan
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Equilibrium Modeling ◽  
Wood Sawdust ◽  
Rubber Wood

scholarly journals Energy intake, gastrointestinal transit, and gut hormone release in response to oral triglycerides and fatty acids in men with and without severe obesity

2019 ◽  
Vol 316 (3) ◽  
pp. G332-G337 ◽  
Author(s):  
Carsten Dirksen ◽  
Jesper Graff ◽  
Stefan Fuglsang ◽  
Jens F. Rehfeld ◽  
Jens J. Holst ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Olive Oil ◽  
Energy Intake ◽  
Severe Obesity ◽  
Gastrointestinal Transit ◽  
Calorie Intake ◽  
Double Blind ◽  
Gut Hormone ◽  
Ad Libitum

Dietary fat, and particularly fatty acids (FAs) from hydrolyzed triglycerides (TGs), reduces appetite, whereas paradoxically, a high-fat diet leads to excess calorie intake. We therefore hypothesized that the appetite-regulating effects of FAs are perturbed in obesity. Ten men with severe obesity [median body mass index (BMI) of 51.0 kg/m2(range of 47.9–69.0)] and 10 men without obesity [BMI of 24.6 kg/m2(range of 21.7–26.8)] were recruited for a double-blind randomized crossover study. On two occasions, participants were given isocaloric (2,660 kJ) and isovolemic (80 ml) loads of either oleic acid (long-chain FA) or olive oil (TG) containing radiolabeled lipid and water markers. Postload scintigraphy, blood sampling, and assessment of appetite were performed for 10 h, after which an ad libitum meal was served. Compared with olive oil, oleic acid slowed gastric mean emptying time (GMET) for lipids ( P < 0.001), accelerated orocoecal transit time (OCTT; P = 0.005), increased postload cholecystokinin section ( P < 0.001), and suppressed ad libitum energy intake ( P = 0.028) in men with severe obesity, and similar effects were seen in the nonobese group (no group × lipid interactions). However, independent of lipid loads, GMET and OCTT were slower (GMETlipidP = 0.046; GMETwaterP = 0.003; OCTT P = 0.001), and basal and postload secretion of glucagon-like peptide-1 (GLP-1) was attenuated ( P = 0.045 and P = 0.048, respectively) in men with severe obesity compared with men without obesity. We conclude that the more potent appetite-regulating effects of oleic acid versus olive oil are unimpaired in men with severe obesity. However, regardless of lipid formulations, severe obesity is associated with slowed gastrointestinal transit and attenuated GLP-1 secretion.NEW & NOTEWORTHY Orally ingested fatty acids more efficiently reduce appetite and energy intake than triglycerides also in men with severe obesity. Men with severe obesity have delayed gastrointestinal transit and attenuated early gut hormone responses after an oral lipid load compared with men without obesity.

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