Solubility of β-Carotene in Binary Solvents Formed by Some Hydrocarbons with Cyclohexanone and 1-Octanol

2001 ◽  
Vol 46 (6) ◽  
pp. 1494-1496 ◽  
Author(s):  
Teresa Treszczanowicz ◽  
Teresa Kasprzycka-Guttman ◽  
Andrzej J. Treszczanowicz
Keyword(s):  
Binary Solvents ◽  
Β Carotene

Solubility of β-Carotene in Binary Solvents Formed by Some Hydrocarbons with Dibutyl Ether and 1,2-Dimethoxyethane

2003 ◽  
Vol 48 (6) ◽  
pp. 1517-1520 ◽  
Author(s):  
Teresa Treszczanowicz ◽  
Teresa Kasprzycka-Guttman ◽  
Andrzej J. Treszczanowicz
Keyword(s):  
Binary Solvents ◽  
Dibutyl Ether ◽  
Β Carotene

Solubility of β-Carotene in Binary Solvents Formed by Some Hydrocarbons with 2,5,8-Trioxanonane, 2-Propanone, and Cyclohexanone

2007 ◽  
Vol 52 (1) ◽  
pp. 261-264 ◽  
Author(s):  
Teresa Treszczanowicz ◽  
Teresa Kasprzycka-Guttman ◽  
Andrzej J. Treszczanowicz
Keyword(s):  
Binary Solvents ◽  
Β Carotene

Solubility of β-Carotene in Binary Solvents Formed by Some Hydrocarbons withtert-Butyl Methyl Ether and withtert-Amyl Methyl Ether

2005 ◽  
Vol 50 (3) ◽  
pp. 973-976 ◽  
Author(s):  
Teresa Treszczanowicz ◽  
Teresa Kasprzycka-Guttmans ◽  
Andrzej J. Treszczanowicz
Keyword(s):  
Methyl Ether ◽  
Binary Solvents ◽  
Β Carotene ◽  
Butyl Methyl Ether

Solubility of β-Carotene in Binary Solvents Formed by Some Hydrocarbons with Ketones

2001 ◽  
Vol 46 (4) ◽  
pp. 792-794 ◽  
Author(s):  
Teresa Treszczanowicz ◽  
Andrzej J. Treszczanowicz ◽  
Teresa Kasprzycka-Guttman ◽  
Anna Kulesza
Keyword(s):  
Binary Solvents ◽  
Β Carotene

Serum Retinol and β-carotene Levels and Risk Factors for Cardiovascular Disease in Morbid Obesity

2010 ◽  
Vol 80 (3) ◽  
pp. 159-167 ◽  
Author(s):  
Gabriela Villaça Chaves ◽  
Gisele Gonçalves de Souza ◽  
Andréa Cardoso de Matos ◽  
Dra. Wilza Abrantes Peres ◽  
Silvia Elaine Pereira ◽  
...  
Keyword(s):  
Risk Factors ◽  
Cardiovascular Disease ◽  
Metabolic Syndrome ◽  
Morbid Obesity ◽  
Serum Levels ◽  
World Health ◽  
Morbidly Obese ◽  
Serum Retinol ◽  
Significant Difference ◽  
Β Carotene

Objective: To evaluate retinol and β-carotene serum levels and their relationship with risk factors for cardiovascular disease in individuals with morbid obesity, resident in Rio de Janeiro. Methodology: Blood serum concentrations of retinol and β-carotene of 189 morbidly obese individuals were assessed. The metabolic syndrome was identified according to the criteria of the National Cholesterol Education Program (NCEP) and World Health Organization (WHO). Lipid profile, insulin resistance, basal insulin, glycemia, blood pressure, and anthropometry and their correlation with retinol and β-carotene serum levels were evaluated. Results: Metabolic syndrome diagnosis was observed in 49.0% of the sample. Within this percentage the levels of β-carotene were significantly lower when body mass index increased. Serum retinol didn't show this behavior. Serum retinol inadequacy in patients with metabolic syndrome (61.3%), according to WHO criterion, was higher (15.8%) than when the whole sample was considered (12.7%). When metabolic syndrome was diagnosed by NCEP criterion, β-carotene inadequacy was higher (42.8%) when compared to the total sample (37.5%). There was a significant difference between average β-carotene values of patients with and without metabolic syndrome (p=0.048) according to the classification of the NCEP. Lower values were found in patients with metabolic syndrome. Conclusion: Considering the vitamin A contribution in antioxidant protection, especially when risk factors for cardiovascular disease are present, it is suggested that great attention be given to morbidly obese. This could aid in prevention and treatment of cardiovascular disease, which affects a significant part of the population.

Vitamin A Value of Plant Food Provitamin A - Evaluated by the Stable Isotope Technologies

2014 ◽  
Vol 84 (Supplement 1) ◽  
pp. 25-29 ◽  
Author(s):  
Guangwen Tang
Keyword(s):  
Stable Isotope ◽  
Vitamin A ◽  
Provitamin A ◽  
Animal Origin ◽  
Plant Food ◽  
Plant Foods ◽  
A Value ◽  
Provitamin A Carotenoids ◽  
Β Carotene

Humans need vitamin A and obtain essential vitamin A by conversion of plant foods rich in provitamin A and/or absorption of preformed vitamin A from foods of animal origin. The determination of the vitamin A value of plant foods rich in provitamin A is important but has challenges. The aim of this paper is to review the progress over last 80 years following the discovery on the conversion of β-carotene to vitamin A and the various techniques including stable isotope technologies that have been developed to determine vitamin A values of plant provitamin A (mainly β-carotene). These include applications from using radioactive β-carotene and vitamin A, depletion-repletion with vitamin A and β-carotene, and measuring postprandial chylomicron fractions after feeding a β-carotene rich diet, to using stable isotopes as tracers to follow the absorption and conversion of plant food provitamin A carotenoids (mainly β-carotene) in humans. These approaches have greatly promoted our understanding of the absorption and conversion of β-carotene to vitamin A. Stable isotope labeled plant foods are useful for determining the overall bioavailability of provitamin A carotenoids from specific foods. Locally obtained plant foods can provide vitamin A and prevent deficiency of vitamin A, a remaining worldwide concern.

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