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Results 501 - 550 of 711
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Oberkotter L V - - 1992
To examine the joint effects of lactation and dietary restriction on thyroid function, we studied chronically food-restricted rat dams at conception and dams and their pups during the nursing period compared with controls that had free access to food. As expected, both dietary restriction [plasma thyroxine and 3,3',5-triiodothyronine (T3) values ...
Reiter R J - - 1992
Melatonin, the chief hormone of the pineal gland, is produced and secreted into the blood in a circadian manner with maximal production always occurring during the dark phase of the light:dark cycle. Whereas the 24h rhythm of melatonin production is very robust in young animals including humans, the cycle deteriorates ...
Maxwell M H - - 1992
1. White blood cell responses of broilers, turkeys and ducks were examined at regular intervals after being subjected to various degrees of food restriction. 2. Restricted-fed broilers showed increases in heterophil and basophil numbers, together with a corresponding decrease in lymphocytes. The heterophil/lymphocyte ratio was raised. There were no differences ...
Holloszy J O - - 1992
A number of studies have shown that exercised rats live longer than sedentary freely eating controls. There is disagreement regarding whether exercise results in extension of maximal life span. However, in two studies of the effect of voluntary wheel running on longevity of male specific-pathogen-free Long-Evans rats it was found ...
Kelly F J - - 1992
The effects of food restriction on the growth and protein turnover of the immature lung were investigated. Preterm guinea pigs, delivered by cesarean section at 65 days gestation (term = 68 days), were given free access to a lactating dam or restricted from feeding for 48 h. Food restriction resulted ...
Levin G - - 1992
The fluidity of the erythrocyte membrane derived from growing rats raised under restricted food intake was found to be higher than the fluidity of the respective membranes from ad libitum fed animals. Considering the apparent relationship between the decrease in membrane fluidity and aging, the results point to the possible ...
Siyamak A Y - - 1992
The thermogenic responses to noradrenaline have been studied during food restriction in conscious rats. Acute starvation for 16-18 h reduced the body weight by 3% but not the resting metabolic rate or the increase in metabolic rate induced by noradrenaline, compared to control rats. Sub-acute underfeeding (eight days) with 50% ...
Masukawa T - - 1991
The circadian variation of decapitation-induced gasping was investigated by measuring the gasping duration of isolated mouse head after decapitation under both normal and restricted feeding conditions. In the normally fed mice, there was a circadian periodicity in the gasping duration: it was longer during the light period than during the ...
Tazume S - - 1991
The effects of food restriction on immune function was investigated in germfree (GF) and specific pathogen-free (SPF) mice. They were maintained from five weeks of age under either full-fed or food-restricted conditions to 4.5 grams per day (equivalent to approximately 80% of full-fed intake) of a commercial diet. Longest survival ...
Lakshmi R - - 1991
Inflammatory response has been assessed in riboflavin or pyridoxine deficient rats. Edema was increased by 54% in pyridoxine deficiency as compared to weight-matched control rats. Food restriction per se reduced the volume of edema by 63%. In pyridoxine deficiency, concentrations of thiobarbituric acid reactive substances (which indicate the extent of ...
Tazume S - - 1991
An investigation was undertaken to study the effects of germfree (GF) status and mild food restriction on life span in GF and specific pathogen-free (SPF) male ICR mice either full-fed (ad libitum) or on a restricted diet of 4.5 grams per day (equivalent to approximately 80% of full-fed intake) from ...
Pieri C - - 1991
The effect of food restriction on morphometric parameters of cerebellar synapses has been evaluated. A decrease in the number and surface density of synapses has been observed comparing 6 and 27-28 month old rats. Food restriction prevented the loss of the number and attenuated the reduction of the surface density ...
Terlouw E M - - 1991
Consistent individual differences in animals' responses to different stressful situations may indicate the involvement of a single behavioural and neurological mechanism across these situations. Two replicate groups of sixteen food restricted pigs were subjected to a group feeding competition test where group members were required to compete over a food ...
Maxwell M H - - 1991
The haematology and histopathology of seven-week-old broilers were examined after periods of early food restriction, for six, 10 or 14 days from six days old. After several weeks on an ad libitum diet the birds failed to compensate for the weight lost during early food restriction. Immediately after the periods ...
Stokkan K A - - 1991
The effects of chronic (40%) food restriction from 6 weeks of age were studied in aging male Fisher 344 rats. When compared with 3-month-old, ad libitum fed rats, pineal N-acetyltransferase (NAT) activity had declined to less than 30% and pineal and serum levels of melatonin to 40% after 28 months ...
Zaki M S - - 1991
In order to study the regulation of food intake and correlated body energy metabolism, the effect of restricted feeding during the light period in female IVCS mice was investigated. Access to food and water was restricted (RF group) for 3 weeks only from 10:00 hr to 17:00 hr, and that ...
Holloszy J O - - 1991
Male rats that exercise in running wheels have a longer average survival than freely eating sedentary controls but, in contrast to food-restricted sedentary controls of the same weight, show no extension of maximal life span (J. Appl. Physiol. 59: 826-831, 1985). To test the possibility that exercise may counteract a ...
Woodside B - - 1991
The effect of food restriction (60% of an ad lib ration) for the first 14 days postpartum on serum progesterone levels and the duration of lactational diestrus was determined in rat dams nursing litters of eight pups. Food restricted dams showed a longer period of lactational diestrus than ad lib ...
Murphy H M - - 1991
This study examined patterns of consummatory behavior in normal and vasopressin-deficient rats under ad lib and food-restricted conditions. Differing patterns of intake of food, water, sucrose, and saccharin were found in the two groups. During the ad lib period, the normal rats gained more weight and ate significantly more food ...
Blank S E - - 1991
Effects of 4-week food restriction and ethanol consumption on natural killer (NK) cell activity and carcass composition were evaluated. Female, C57BL/6 mice given water (H2O) or ethanol (20% w/v, ETOH) ad libitum were placed in one of three dietary groups: unrestricted (UNR), moderately restricted (MR, 2.2 g/day), or severely restricted ...
Miksik I - - 1991
Accumulation of glycation products (as revealed by the thiobarbituric test and hexosyllysine assay) and the pigmented products (350 nm UV absorbance and 370ex/440em nm fluorescence) in aortal and skin collagen was investigated under the conditions of different nutritional regimes. Four groups of animals were tested: (1) ad libitum fed controls, ...
Luz J - - 1991
1. The interrelationship between food intake, body weight and oxygen consumption was analysed at 25 degrees C in growing rats. 3. The experiment was divided into two phases lasting four weeks each. During the first phase the animals were subjected to energy restriction and during the second phase they were ...
Wayne N L - - 1991
In the first experiment, the effects of food availability on growth and reproduction were assessed by placing male musk shrews on 3 different feeding schedules, i.e. fed ad libitum, fed 50% of the amount eaten by the ad-libitum controls or fed 25% of the amount eaten by the ad-libitum controls. ...
Sarwar G - - 1991
Foods rich in nucleic acids, which elevate serum uric acid levels, are restricted in the diets of hyperuricemic individuals. This restriction has been based on the amount of total dietary nucleic acids or all purines, assuming no differences in uricogenic effects of individual purines (adenine, guanine, hypoxanthine, and xanthine). However, ...
Holmgren B - - 1991
The effect of feeding schedules on the daily rhythm in spontaneous yawning activity was studied in high yawning (HY) Sprague-Dawley rats. If the animals are fed ad libitum and changed from a standard 12-12 light-dark (LD) illumination regime to constant light (LL), the normal predark circadian peak in yawning disappears, ...
Ahmed F - - 1991
The effect of severe food restriction on the histopathology of the gut following infection with epizootic diarrhoea of infant mice (EDIM) rotavirus was studied in mice. Over a period of 12 weeks, weanling mice were fed either 70 or 50% of the diet eaten by a control group on the ...
Ebbesen P - - 1991
When caged in groups of three and fed ad libitum, dominant male mice survived longer than subordinate group members which again lived longer than males caged in groups of nine, among whom no rank order was established. In groups of nine the social structure was not affected when the food ...
Lee D W - - 1990
Reducing dietary intake has been shown to be the most effective means for modulating aging processes in laboratory rodents. Dietary restriction has also been shown to be a modulator of membrane lipid peroxidation and cytosolic antioxidant status. In the present study, anti-radical action of dietary restriction was investigated further by ...
Hammond P B - - 1990
Lead (Pb) depresses growth in infants and young children. Our earlier studies using a weanling rat model of Pb exposure suggest that this Pb effect is due to depression of appetite. In the present study we examined whether this depression of appetite is consistent with a down-regulation of the appetite ...
Russell J C - - 1990
Corpulent rats of the JCR:LA-corpulent strain spontaneously develop atherosclerotic lesions, occlusive thrombi and myocardial lesions. In addition to exhibiting a VLDL hyperlipidemia they are insulin resistant. Young male corpulent rats have significantly impaired rates of clearance of plasma glucose on an intravenous glucose tolerance test in comparison to lean rats ...
Ekanem E E - - 1990
A study was conducted among mothers in a suburban community in Lagos to ascertain child feeding patterns during episodes of diarrhoea. Two hundred women with children of 6 to 36 months were selected randomly from 672 who were participating in a diarrhoea surveillance study. The vast majority restricted the consumption ...
Wirrmann C - - 1990
A serodiagnostic test based on antigen 60 has been used to analyse the presence of IgG antibodies specific for mycobacteria, in the serum of the employees of a food supermarket. More than fourteen percent of the employees were seropositive, compared to 1.5% in a health adult population. The seropositives were ...
Martin R J - - 1990
The mechanisms involved in the recovery of body fat and liver metabolism after food restriction and refeeding are not understood. This study's aim was to determine the need for hepatic neural input for the compensatory changes in food intake, body composition and hepatic lipogenic enzymes seen upon realimentation after energy ...
Bronson F H - - 1990
These studies focused on the phenomenon of "catch-up" pubertal development. Circulating levels of several hormones were characterized in 8-wk-old female rats whose growth and reproductive development had been blocked before puberty by restricting their food intake. Some of these females were fed ad libitum for 24 h to initiate rapid ...
Demitrack M A - - 1990
Oxytocin is a hypothalamic neuropeptide with both centrally and peripherally directed pathways. Data from experimental animals indicate that oxytocin impairs consolidation of aversively conditioned behaviors and is released after feeding or experimental gastric distension. The authors report that the mean CSF oxytocin level of five underweight women with restricting anorexia, ...
Kapil U - - 1990
Maternal beliefs regarding diet during common childhood illnesses--diarrhea, fever, measles, cough and marasmus were determined in 143 rural mothers by using the interview technique. Some foods were preferred while others were restricted during episode of each illness, depending upon their 'hot' and 'cold', 'light' and 'heavy' and other characteristics, as ...
Habib M P - - 1990
Dietary restriction without malnutrition prolongs life and has a beneficial effect on age-related diseases and metabolic derangements. To test the effect of food restriction on ethane production rate, ethane exhalation was measured in rats with partial food restriction. Ethane production rate in room air in rats fed 60% of food ...
Foreman N - - 1990
Some laboratory studies have suggested that whereas food restriction in animals leads to response alternation (behavioural flexibility), water restriction induces perseverative, stereotyped responding. Hooded rats, restricted to 1 hour per day access to either food or water, were tested on a radial-arm maze (using a procedure that eliminates algorithmic response ...
Herlihy J T - - 1990
Long-term food restriction exerts an anti-aging action in rodents. The mechanism underlying its modulation of aging processes is unknown but changes in endocrine systems have been postulated as couplers of food restriction to aging. The effects of long-term food restriction on the serum concentrations of thyroid hormones were examined in ...
Morris G S - - 1990
In addition to thyroid hormone, carbohydrate oxidation appears to influence the relative distribution of rodent cardiac isomyosin (V1, V2, V3), especially in diabetic, thyroid-deficient, and food-restricted animals. To determine whether metabolic variations within the myocardium itself contribute to cardiac isomyosin distribution, food-restricted rats (predominantly V3) were treated with oxfenicine, a ...
Borges D R - - 1990
We measured the clearance rate of plasma kallikrein by the liver in three groups of rats: one recently weaned, and two seven weeks old (control and food-restricted groups). The clearance rates were similar in the three groups when expressed as units/g liver. The livers of the recently weaned and food-restricted ...
Masoro E J - - 1990
Restricting the food intake of rodents extends the median length of life and the maximum life-span. It also retards most age-associated physiologic change and age-associated diseases. Our research indicates that the ability to retard disease processes is not the major reason for the extension of life-span or for the retardation ...
Yu B P - - 1990
The major difficulty in defining the mechanisms for the action of food restriction relates to its diversity and lack of specificity. In searching for the common factor(s) and commonality involved in such diversified effects, a cellular homeostasis mechanism is proposed. A study initiated in our laboratory strongly indicates that the ...
Deerberg F - - 1990
Food consumption, development of body weight, lifespan and incidence of spontaneous diseases and tumours were investigated in 3 groups of 96 male Han:SPRD rats each maintained in a longevity study from weaning up to their natural death. All rats were fed a commercial cereal-based diet. One group received food ad ...
Bartness T J - - 1990
Research on the metabolic control of feeding has been almost exclusively restricted to the study of laboratory rats. This poses no problem if all animals respond to metabolic challenges similarly; however, they do not. Unlike rats, Syrian, Turkish, and to a lesser degree, Siberian hamsters do not increase their food ...
Duffy P H - - 1990
A variety of physiological and behavioral parameters which relate to metabolism were continuously monitored in 18 month old female Fischer 344 rats which were maintained on either ad libitum or reduced calorie diets. Caloric restriction (CR) stimulated average motor activity per day, the duration of each feeding episode, food consumed ...
Jones L C - - 1990
1. Male and female Wistar-strain rats were studied under either ad libitum or 23-hour food restriction conditions both with and without access to a running wheel. 2. Daily measures were taken of body weight, food consumption and wheel revolutions. 3. It was observed that food restriction was associated with decreased ...
Shulman K I - - 1989
The aim of this study is to provide clearer guidelines for rational, safe, and practical dietary restriction for use with monoamine oxidase inhibitors. Tyramine levels were assayed in over 100 of the controversial foods that have been associated with hypertensive reactions or reported to contain high levels of tyramine. Only ...
McCarter R J - - 1989
Metabolic rate (MR) is widely regarded as an important component of aging processes. Decreased MR has been suggested as a possible mechanism of the life-prolonging action of food restriction in rodents and recent reports show lowered plasma levels of tri-iodothyronine (T3), a regulator of MR, in food restricted rodents. In ...
Mitra J - - 1989
Food restriction or decreasing the ratio of [Na+, K+] to [Ca++, Mg++] in the diet of female rats before conception favoured the production of female offspring. Seven days of food deprivation decreased uterine fluid GPC diesterase activity in female rats, whereas long-term food restriction (21 days), rather than decreasing the ...
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