EFFECT OF DIETARY OILS ON THE DEPLETION OF VITAMIN A

1960 ◽  
Vol 38 (1) ◽  
pp. 663-666
Author(s):  
T. K. Murray ◽  
J. L. Beare ◽  
J. A. Campbell
Keyword(s):  
Vitamin A ◽  
Olive Oil ◽  
Rapeseed Oil ◽  
Corn Oil ◽  
Vitamin A Metabolism ◽  
Dietary Oils ◽  
Depletion Period ◽  
Liver And Kidney ◽  
Dietary Oil ◽  
Small Content

The effect of dietary corn oil, olive oil, and rapeseed oil on the vitamin A content of liver and kidney during depletion of the vitamin was studied. Dietary oil had no influence on the rate at which liver stores of the vitamin declined in a 2-month period. Kidney stores of vitamin A rose throughout the depletion period but less markedly in the group fed rapeseed oil. The weight gain of vitamin A deficient rats was reduced somewhat earlier when rapeseed oil was fed but the survival time of rats fed corn oil or rapeseed oil was similar. The rats fed olive oil lived somewhat longer due to its small content of β-carotene. It was concluded that rapeseed oil had only a slight influence on vitamin A metabolism.

EFFECT OF DIETARY OILS ON THE DEPLETION OF VITAMIN A

1960 ◽  
Vol 38 (7) ◽  
pp. 663-666 ◽  
Author(s):  
T. K. Murray ◽  
J. L. Beare ◽  
J. A. Campbell
Keyword(s):  
Vitamin A ◽  
Olive Oil ◽  
Rapeseed Oil ◽  
Corn Oil ◽  
Vitamin A Metabolism ◽  
Dietary Oils ◽  
Depletion Period ◽  
Liver And Kidney ◽  
Dietary Oil ◽  
Small Content

The effect of dietary corn oil, olive oil, and rapeseed oil on the vitamin A content of liver and kidney during depletion of the vitamin was studied. Dietary oil had no influence on the rate at which liver stores of the vitamin declined in a 2-month period. Kidney stores of vitamin A rose throughout the depletion period but less markedly in the group fed rapeseed oil. The weight gain of vitamin A deficient rats was reduced somewhat earlier when rapeseed oil was fed but the survival time of rats fed corn oil or rapeseed oil was similar. The rats fed olive oil lived somewhat longer due to its small content of β-carotene. It was concluded that rapeseed oil had only a slight influence on vitamin A metabolism.

RESPONSES OF TWO STRAINS OF RATS TO RAPESEED OIL AND CORN OIL

1960 ◽  
Vol 38 (3) ◽  
pp. 187-192 ◽  
Author(s):  
Joyce L. Beare ◽  
T. K. Murray ◽  
J. A. Campbell
Keyword(s):  
Vitamin A ◽  
Rapeseed Oil ◽  
Wistar Rats ◽  
Corn Oil ◽  
Strain Differences ◽  
Basal Diet ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Significant Difference ◽  
Dietary Oil

Wistar and Sprague–Dawley rats were compared in their response to 20% rapeseed oil or corn oil in a basal diet of ground fox cubes. Apparent coefficients of digestibility were significantly lower for rapeseed oil than for corn oil in the Sprague–Dawley, but not in the Wistar rats. After 6 weeks the adrenals of Sprague–Dawley rats were larger in the animals fed rapeseed oil than in those fed corn oil, while the adrenals of Wistar rats were not influenced by the dietary oil. These strain differences explain some discrepancies appearing in the literature concerning the effects of rapeseed oil in the rat.In another experiment, Wistar and Sprague–Dawley rats deprived of vitamin A for 18 days were fed a purified basal diet with 20% rapeseed oil or corn oil and dosed with 75 or 150 I.U. of vitamin A per day. After 14 days there was no significant effect of the strain of rat or the type of dietary oil on the liver storage of vitamin A. The rate of depletion of vitamin A from the liver following a single dose of 1200 I.U. of vitamin A was also studied and indicated no significant difference attributable to the dietary oils.

RESPONSES OF TWO STRAINS OF RATS TO RAPESEED OIL AND CORN OIL

1960 ◽  
Vol 38 (1) ◽  
pp. 187-192 ◽  
Author(s):  
Joyce L. Beare ◽  
T. K. Murray ◽  
J. A. Campbell
Keyword(s):  
Vitamin A ◽  
Rapeseed Oil ◽  
Wistar Rats ◽  
Corn Oil ◽  
Strain Differences ◽  
Basal Diet ◽  
Sprague Dawley ◽  
Sprague Dawley Rats ◽  
Significant Difference ◽  
Dietary Oil

Wistar and Sprague–Dawley rats were compared in their response to 20% rapeseed oil or corn oil in a basal diet of ground fox cubes. Apparent coefficients of digestibility were significantly lower for rapeseed oil than for corn oil in the Sprague–Dawley, but not in the Wistar rats. After 6 weeks the adrenals of Sprague–Dawley rats were larger in the animals fed rapeseed oil than in those fed corn oil, while the adrenals of Wistar rats were not influenced by the dietary oil. These strain differences explain some discrepancies appearing in the literature concerning the effects of rapeseed oil in the rat.In another experiment, Wistar and Sprague–Dawley rats deprived of vitamin A for 18 days were fed a purified basal diet with 20% rapeseed oil or corn oil and dosed with 75 or 150 I.U. of vitamin A per day. After 14 days there was no significant effect of the strain of rat or the type of dietary oil on the liver storage of vitamin A. The rate of depletion of vitamin A from the liver following a single dose of 1200 I.U. of vitamin A was also studied and indicated no significant difference attributable to the dietary oils.

THE EFFECT OF RAPESEED OIL ON REPRODUCTION AND ON THE COMPOSITION OF RAT MILK FAT

1961 ◽  
Vol 39 (2) ◽  
pp. 195-201 ◽  
Author(s):  
Joyce L. Beare ◽  
E. R. W. Gregory ◽  
D. Morison Smith ◽  
J. A. Campbell
Keyword(s):  
Fatty Acids ◽  
Oleic Acid ◽  
Olive Oil ◽  
Dietary Fat ◽  
Milk Fat ◽  
Rapeseed Oil ◽  
Corn Oil ◽  
Saturated Fatty Acids ◽  
Low Fat ◽  
Low Fat Diet

Rats fed corn oil or a mixture of lard and olive oil produced as many offspring as those receiving no fat supplement with a low-fat commercial meal, but the weanling weight was lower. Although rats fed rapeseed oil continued to reproduce they had fewer and smaller offspring than rats fed other diets.The composition of fatty acids in the milk varied with the dietary fat of the mother. Animals receiving the low-fat diet secreted predominantly saturated fatty acids. A high proportion of linoleic acid appeared in the milk when corn oil was fed, and of oleic acid when the mixture of lard and olive oil was fed. Eicosenoic and erucic acids were present in the milk of rats receiving rapeseed oil, but were less prevalent than in the original oil.

A COMPARISON OF THE UTILIZATION OF RAPESEED OIL AND CORN OIL BY THE RAT

1959 ◽  
Vol 37 (5) ◽  
pp. 613-621 ◽  
Author(s):  
Joyce L. Beare ◽  
T. K. Murray ◽  
H. C. Grice ◽  
J. A. Campbell
Keyword(s):  
Body Weight ◽  
Vitamin A ◽  
Rapeseed Oil ◽  
Wistar Rats ◽  
Corn Oil ◽  
Weekly Interval ◽  
Organ Weights ◽  
Weight Gains ◽  
Ad Libitum ◽  
Liver Storage

The effects of Golden rapeseed oil and corn oil on weekly weight gains, food consumptions, liver storage of vitamin A, plasma and adrenal cholesterol concentrations, organ weights, and testes histology were determined in Wistar rats for 5 weeks after weaning. At each weekly interval, animals fed rapeseed oil showed lesser weight gains and food consumptions, but, when body weight gains were adjusted for food consumptions by covariance analyses, differences largely disappeared. Liver storage of vitamin A was similar with both oils. Testes of animals fed rapeseed oil exhibited no alteration in cellular characteristics, but a reduction in tubular size. When fed to older rats, rapeseed oil again produced smaller weight gains which were accounted for at 4 weeks' time by a depressed appetite.Similar weight gains were obtained with corn oil and rapeseed oil when the oils were paired fed and when adjustments for food consumption were made by covariance analyses of weight gains of animals receiving the oils ad libitum. With corn oil supplied on a restricted basis the testicular tubules were smaller than those obtained with unrestricted feeding of corn oil. The absorption of corn oil and rapeseed oil fed ad libitum was 95 and 92% respectively. It was concluded that the two oils were not very differently utilized.

scholarly journals Authenticity and Concentration Analysis of Extra Virgin Olive Oil Using Spontaneous Raman Spectroscopy and Multivariate Data Analysis

2019 ◽  
Vol 9 (12) ◽  
pp. 2433 ◽  
Author(s):  
Shiyamala Duraipandian ◽  
Jan C. Petersen ◽  
Mikael Lassen
Keyword(s):  
Raman Spectroscopy ◽  
Olive Oil ◽  
Rapeseed Oil ◽  
Corn Oil ◽  
Edible Oils ◽  
Virgin Olive Oil ◽  
Extra Virgin Olive Oil ◽  
Ternary Mixtures ◽  
Calibration Models ◽  
Oil Mixtures

Adulteration of extra virgin olive oil (EVOO) with cheaper edible oils is of considerable concern in the olive oil industry. The potential of Raman spectroscopy combined with multivariate statistics has been investigated for evaluating the authenticity (or purity) and concentration of EVOO irrespective of it being adulterated with one or more adulterants. The adulterated oil samples were prepared by blending different concentrations of EVOO (10–100% v/v) randomly with cheaper edible oils such as corn, soybean and rapeseed oil. As a result, a Raman spectral database of oil samples (n = 214 spectra) was obtained from 11 binary mixtures (EVOO and rapeseed oil), 16 ternary mixtures (EVOO, rapeseed and corn oil) and 44 quaternary mixtures (EVOO, rapeseed, corn and soybean oil). Partial least squares (PLS) calibration models with 10-fold cross validation were constructed for binary, ternary and quaternary oil mixtures to determine the purity of spiked EVOO. The PLS model on the complex dataset (binary + ternary + quaternary) where the spectra obtained with different measurement parameters and sample conditions can able to determine the purity of spiked EVOO inspite of being blended with one or more cheaper oils. As a proof of concept, in this study, we used single batch of commercial oil bottles for estimating the purity of EVOO. The developed method is not only limited to EVOO, but can be applied to clean EVOO obtained from the production site and other types of food.

INFLUENCE OF SELECTIVE AND NON-SELECTIVE HYDROGENATION OF RAPESEED OIL ON CARCASS FAT OF RATS

1963 ◽  
Vol 41 (1) ◽  
pp. 51-56 ◽  
Author(s):  
B. M. Craig ◽  
C. G. Youngs ◽  
Joyce L. Beare ◽  
J. A. Campbell
Keyword(s):  
Erucic Acid ◽  
Olive Oil ◽  
Corn Oil ◽  
Dietary Fatty Acids ◽  
The Body ◽  
Lower Body ◽  
Dietary Oils ◽  
Lower Weight ◽  
Lower Body Weight ◽  
Weight Gains

Two rapeseed oils with erucic acid contents of 23 and 42%, their hydrogenated products produced under selective and non-selective conditions, corn oil, and a lard – olive oil mixture were fed to separate groups of rats for 4 weeks. Fatty acid composition of dietary oils and carcass fats was determined. The rapeseed oils and their hydrogenated products were associated with lower food intakes and lower body weight gains than were corn oil and the lard – olive oil mixture. Small amounts of erucic acid were incorporated into the body fats. It is possible that the amount of palmitic acid in the rapeseed oils and their products is too small for a good balance of dietary fatty acids, and is partially responsible for the lower weight gains.

INFLUENCE OF SELECTIVE AND NON-SELECTIVE HYDROGENATION OF RAPESEED OIL ON CARCASS FAT OF RATS

1963 ◽  
Vol 41 (1) ◽  
pp. 51-56 ◽  
Author(s):  
B. M. Craig ◽  
C. G. Youngs ◽  
Joyce L. Beare ◽  
J. A. Campbell
Keyword(s):  
Erucic Acid ◽  
Olive Oil ◽  
Corn Oil ◽  
Dietary Fatty Acids ◽  
The Body ◽  
Lower Body ◽  
Dietary Oils ◽  
Lower Weight ◽  
Lower Body Weight ◽  
Weight Gains

Two rapeseed oils with erucic acid contents of 23 and 42%, their hydrogenated products produced under selective and non-selective conditions, corn oil, and a lard – olive oil mixture were fed to separate groups of rats for 4 weeks. Fatty acid composition of dietary oils and carcass fats was determined. The rapeseed oils and their hydrogenated products were associated with lower food intakes and lower body weight gains than were corn oil and the lard – olive oil mixture. Small amounts of erucic acid were incorporated into the body fats. It is possible that the amount of palmitic acid in the rapeseed oils and their products is too small for a good balance of dietary fatty acids, and is partially responsible for the lower weight gains.

A COMPARISON OF THE UTILIZATION OF RAPESEED OIL AND CORN OIL BY THE RAT

1959 ◽  
Vol 37 (1) ◽  
pp. 613-621 ◽  
Author(s):  
Joyce L. Beare ◽  
T. K. Murray ◽  
H. C. Grice ◽  
J. A. Campbell
Keyword(s):  
Body Weight ◽  
Vitamin A ◽  
Rapeseed Oil ◽  
Wistar Rats ◽  
Corn Oil ◽  
Weekly Interval ◽  
Organ Weights ◽  
Weight Gains ◽  
Ad Libitum ◽  
Liver Storage

The effects of Golden rapeseed oil and corn oil on weekly weight gains, food consumptions, liver storage of vitamin A, plasma and adrenal cholesterol concentrations, organ weights, and testes histology were determined in Wistar rats for 5 weeks after weaning. At each weekly interval, animals fed rapeseed oil showed lesser weight gains and food consumptions, but, when body weight gains were adjusted for food consumptions by covariance analyses, differences largely disappeared. Liver storage of vitamin A was similar with both oils. Testes of animals fed rapeseed oil exhibited no alteration in cellular characteristics, but a reduction in tubular size. When fed to older rats, rapeseed oil again produced smaller weight gains which were accounted for at 4 weeks' time by a depressed appetite.Similar weight gains were obtained with corn oil and rapeseed oil when the oils were paired fed and when adjustments for food consumption were made by covariance analyses of weight gains of animals receiving the oils ad libitum. With corn oil supplied on a restricted basis the testicular tubules were smaller than those obtained with unrestricted feeding of corn oil. The absorption of corn oil and rapeseed oil fed ad libitum was 95 and 92% respectively. It was concluded that the two oils were not very differently utilized.

Vitamin A Metabolism in Infection

1955 ◽  
Vol 57 (2) ◽  
pp. 277-286 ◽  
Author(s):  
B. M. Kagan ◽  
Elizabeth Kaiser
Keyword(s):  
Vitamin A ◽  
Vitamin A Metabolism
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