MESENTERIC NEUTRAL FAT IN OBESE RATS

1958 ◽  
Vol 36 (1) ◽  
pp. 913-918
Author(s):  
Eldon M. Boyd ◽  
Eleanor M. Crandell
Keyword(s):  
Free Cholesterol ◽  
Dry Weight ◽  
Female Rats ◽  
Albino Rats ◽  
Fat Depots ◽  
Mesenteric Fat ◽  
Obese Rats ◽  
Physiologic Function ◽  
Relationship Of ◽  
The Relationship

The relationship of increasing obesity to storage of neutral fat in the mesentery was investigated in 48 albino rats. Calculated as grams per 100 g nonlipid dry weight, levels of mesenteric neutral fat were positively correlated with levels of mesenteric free cholesterol, phospholipid, and water, the correlation coefficient for water being higher in male than in female rats. These results suggest that storage of neutral fat is an active physiologic function of mesentery. On the other hand, the relative amount of body neutral fat which is stored in the mesentery became less as the animals became more obese. This indicates that in obese rats, some tissue other than mesentery is storing neutral fat at a rate greater than occurs in the mesenteric fat depots.

MESENTERIC NEUTRAL FAT IN OBESE RATS

1958 ◽  
Vol 36 (9) ◽  
pp. 913-918 ◽  
Author(s):  
Eldon M. Boyd ◽  
Eleanor M. Crandell
Keyword(s):  
Free Cholesterol ◽  
Dry Weight ◽  
Female Rats ◽  
Albino Rats ◽  
Fat Depots ◽  
Mesenteric Fat ◽  
Obese Rats ◽  
Physiologic Function ◽  
Relationship Of ◽  
The Relationship

The relationship of increasing obesity to storage of neutral fat in the mesentery was investigated in 48 albino rats. Calculated as grams per 100 g nonlipid dry weight, levels of mesenteric neutral fat were positively correlated with levels of mesenteric free cholesterol, phospholipid, and water, the correlation coefficient for water being higher in male than in female rats. These results suggest that storage of neutral fat is an active physiologic function of mesentery. On the other hand, the relative amount of body neutral fat which is stored in the mesentery became less as the animals became more obese. This indicates that in obese rats, some tissue other than mesentery is storing neutral fat at a rate greater than occurs in the mesenteric fat depots.

Blood Oxygen Capacity of Albino Rats

1956 ◽  
Vol 188 (1) ◽  
pp. 118-120 ◽  
Author(s):  
Jack D. Burke
Keyword(s):  
Body Weight ◽  
Rattus Norvegicus ◽  
Female Rats ◽  
Albino Rats ◽  
Blood Oxygen ◽  
Oxygen Capacity ◽  
Relationship Of ◽  
The Relationship ◽  
Weight Groups

The oxygen capacity of the blood of 64 albino Rattus norvegicus (Sherman strain) was determined by the microgasometric syringe method. Data were obtained showing the relationship of blood oxygen capacity to weight and sex of the animals. It was found that blood oxygen capacity in volumes per cent increased as the weight of the rats increased. Statistically, there was no difference in the blood values in either male or female rats as analyzed in different weight groups and ranges. Also, the oxygen capacity of the blood per unit of body weight decreased as the weight of the rats increased.

NEUTRAL FAT OF THE PERIRENAL FAT DEPOTS

1957 ◽  
Vol 35 (2) ◽  
pp. 157-160 ◽  
Author(s):  
Eldon M. Boyd ◽  
Alfred H. Lower
Keyword(s):  
Free Cholesterol ◽  
Dry Weight ◽  
Water Levels ◽  
Male Rats ◽  
Albino Rats ◽  
Cholesterol Esters ◽  
Albino Rat ◽  
Fat Depots ◽  
Males And Females ◽  
Perirenal Fat

The possibility was investigated that perirenal fat depots which have high levels of neutral fat also have high levels of phospholipid and free cholesterol associated with increased ability to actively store fat. Lipid and water levels per unit nonlipid dry weight were measured upon perirenal fat depots in 27 male and 24 female albino rats. Mean levels of water, free cholesterol, and phospholipid were significantly higher in female than in male rats. In perirenal depots containing high levels of neutral fat, (a) weights of the organ were low in females (P = 0.01 to 0.02) but not significantly so in males (P = 0.1 to 0.4), (b) levels of phospholipid were unaffected, and (c) levels of ester cholesterol, free cholesterol, and water were high in both males and females (P < 0.001 to 0.05). The results indicate that storage of increased levels of neutral fat in perirenal fat depots of the albino rat is associated with increased levels of cholesterol, cholesterol esters, and water per unit nonlipid dry weight.

NEUTRAL FAT OF THE PERIRENAL FAT DEPOTS

1957 ◽  
Vol 35 (1) ◽  
pp. 157-160
Author(s):  
Eldon M. Boyd ◽  
Alfred H. Lower
Keyword(s):  
Free Cholesterol ◽  
Dry Weight ◽  
Water Levels ◽  
Male Rats ◽  
Albino Rats ◽  
Cholesterol Esters ◽  
Albino Rat ◽  
Fat Depots ◽  
Males And Females ◽  
Perirenal Fat

The possibility was investigated that perirenal fat depots which have high levels of neutral fat also have high levels of phospholipid and free cholesterol associated with increased ability to actively store fat. Lipid and water levels per unit nonlipid dry weight were measured upon perirenal fat depots in 27 male and 24 female albino rats. Mean levels of water, free cholesterol, and phospholipid were significantly higher in female than in male rats. In perirenal depots containing high levels of neutral fat, (a) weights of the organ were low in females (P = 0.01 to 0.02) but not significantly so in males (P = 0.1 to 0.4), (b) levels of phospholipid were unaffected, and (c) levels of ester cholesterol, free cholesterol, and water were high in both males and females (P < 0.001 to 0.05). The results indicate that storage of increased levels of neutral fat in perirenal fat depots of the albino rat is associated with increased levels of cholesterol, cholesterol esters, and water per unit nonlipid dry weight.

SKINFOLD NEUTRAL FAT IN OBESE RATS

1961 ◽  
Vol 39 (2) ◽  
pp. 321-326 ◽  
Author(s):  
Eldon M. Boyd
Keyword(s):  
Body Fat ◽  
Free Cholesterol ◽  
Dry Weight ◽  
Albino Rats ◽  
Percentage Of Body Fat ◽  
Primary Function ◽  
Obese Rats

Increasing levels of water, phospholipid, and free cholesterol were found positively correlated with increasing levels of neutral fat per unit nonlipid dry weight of skinfold in albino rats. Increasing levels of skinfold neutral fat were in turn positively correlated with storage in skinfold of increasing percentages of body neutral fat. These results suggest that storage of neutral fat is an active, primary function of skinfold and that the more active this function the greater the percentage of body fat stored in skinfold. Correlation was, in general, greater in females than in males. In addition, levels of skinfold neutral fat in females were positively correlated with levels of skinfold ester cholesterol.

Further Studies on the Relationship of Adrenal and Gonadal Steroids in Pubertal Development in Female Rats

1979 ◽  
Vol 10 (2-3) ◽  
pp. 130-142 ◽  
Author(s):  
J.R. Ducharme ◽  
A.M. Morera ◽  
P. Laurin ◽  
R. Collu ◽  
L. Audi ◽  
...  
Keyword(s):  
Pubertal Development ◽  
Gonadal Steroids ◽  
Female Rats ◽  
Relationship Of ◽  
The Relationship

The relationship of body weights with incidence and severity of myocardial necrosis in male albino rats

1984 ◽  
Vol 4 (4) ◽  
pp. 681-689 ◽  
Author(s):  
B.K. Thompson ◽  
J.K.G. Kramer ◽  
E.R. Farrworth ◽  
A.H. Corner ◽  
H.W. Hulan
Keyword(s):  
Myocardial Necrosis ◽  
Albino Rats ◽  
Body Weights ◽  
Relationship Of ◽  
The Relationship

Population variation in Sorghum halepense, Johnson grass, at the northern limits of its range

1984 ◽  
Vol 62 (9) ◽  
pp. 1781-1790 ◽  
Author(s):  
S. I. Warwick ◽  
B. K. Thompson ◽  
L. D. Black
Keyword(s):  
New York ◽  
Dry Weight ◽  
Population Variation ◽  
Sorghum Halepense ◽  
Johnson Grass ◽  
Allocation Patterns ◽  
Cultivated Species ◽  
Relationship Of ◽  
The Relationship ◽  
Enzyme Patterns

Thirteen populations of Sorghum halepense, Johnson grass, were sampled from fields in Ontario, Canada, and Ohio and New York, United States. Only four of these populations were reported to overwinter as rhizomes. The morphology, phenology, resource allocation patterns, and growth of seedling and mature plants of the overwintering and the non-overwintering populations were compared. Field-collected specimens from the nonoverwintering populations had wider culms and leaves and larger seeds and inflorescences. Analysis of material grown in a 5-month greenhouse trial indicated similar differences. Greenhouse plants from the nonoverwintering populations were also characterized by greater percent emergence, larger and faster growing seedlings, earlier flowering, larger culms and seeds, greater reproductive dry weight per plant, and about 1/10th the rhizome dry weight of overwintering plants. Differences between populations within a biotype were evident for both biotypes, although there was little within-population variation, except in rhizome production, where certain individuals of some nonoverwintering populations did not produce extended rhizomes. Among the five enzymes which were examined electrophoretically, only one, phosphoglucomutase (PGM), showed variable isozyme patterns. No differences in enzyme patterns were apparent between the overwintering and the nonoverwintering biotypes. The relationship of the nonoverwintering populations to the cultivated species, Sorghum bicolor and S. almum, an introgressant between S. halepense and S. bicolor, is discussed.

SIGNIFICANT CHANGES IN THE LIPID AND WATER CONTENT OF THE THYMUS GLAND IN ALBINO RATS BEARING WALKER CARCINOMA 256

1955 ◽  
Vol 33 (1) ◽  
pp. 69-82 ◽  
Author(s):  
Eldon M. Boyd ◽  
Valmore Fontaine ◽  
J. Gilbert Hill
Keyword(s):  
Fatty Acids ◽  
Tumor Growth ◽  
Total Lipid ◽  
Free Cholesterol ◽  
Dry Weight ◽  
Thymus Gland ◽  
Albino Rats ◽  
Tumor Bearing ◽  
Total Fatty Acids ◽  
Walker Carcinoma

The investigation was designed to measure hydrolipotropic variations in the thymus gland of albino rats bearing Walker carcinoma 256. This was done upon 27 pairs of littermate albino rats, one of each pair inoculated and one not inoculated with Walker carcinoma 256. The life history of the tumor was evenly represented in the series. Tumor growth was found to be accompanied by a statistically significant increase in total body weight, due to water retention, and decrease in the weight of the thymus gland. The total amount of water, dry weight, total lipid, neutral fat, total fatty acids, free cholesterol, and phospholipid were significantly less in the thymus gland of tumor-bearing albino rats. The concentrations, per unit dry weight, of total lipid, neutral fat, and total fatty acids in the thymus gland were not significantly affected by tumor growth. The similar concentrations of water, total cholesterol, free cholesterol, and phospholipid were significantly increased in the thymus gland of tumor-bearing albino rats. These changes indicated a hydrolipotropic effect of the tumor upon the thymus gland. A pyramidal, up-and-down, change in the concentrations of phospholipid and the three cholesterol fractions in the thymus gland at T/RC coefficients of 30 to 60, together with a marked loss of weight by the gland, suggested the effect upon the thymus gland of factor(s) other than the hydrolipotropic influence.

Sign in / Sign up

Export Citation Format

Share Document