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risk; elderly; exercise; objectives; muscles; body composition; bone density; quality of life; psychomotor development; diabetes
Abstract:
... Physiological systems decline with age. Such declines may be the result of aging itself or physical deconditioning. Evidence suggests that the degree to which decrements occur with aging may be modifiable with physical activity. The elderly adapt to exercise programs at a generally reduced rate. Thus reduced activity, coupled with diabetes, may present unique clinical needs. In the design of exerc ...
dual-energy X-ray absorptiometry; magnetic resonance imaging; laboratory techniques; body weight; computed tomography; body fat distribution; bone density; body mass index; accuracy; lean body mass; weighing devices
rats; nephrocalcinosis; vitamin D; vitamin content; diet; bone density
Abstract:
... Massive, toxic doses of vitamin D have been shown to cause nephrocalcinosis in rats, but the effect of this vitamin within its range of fluctuation in commercial rat diets was unknown. Therefore, in two experiments with young female rats, the effect on nephrocalcinosis of a moderately increased level of vitamin D in the diet was studied, that is 5000 IU/kg versus the recommended concentration of 1 ...
elderly; diet; physical activity; middle-aged adults; smoking (habit); human health; bone density; heritability; lifestyle
Abstract:
... Familial resemblance in bone mineral density at five skeletal sites was measured among 160 adult members of 40 families. Each family included a postmenopausal mother, one pre-menopausal daughter, one son, and the children's father. Similarities in selected life-style factors thought to influence bone density, such as physical activity, smoking, alcohol use, and diet, were also evaluated. Bone dens ...
perches (animal housing); battery husbandry; radiography; tibia; humerus; bone fractures; physical activity; battery cages; bone formation; bone density; osteoporosis; hens; bone strength
Abstract:
... 1. Bone structure and breaking strength were measured in hens that had been housed throughout a laying year in battery cages or in Perchery, Naturel or Litter and Wire husbandry systems. 2. Battery caged hens had the poorest bones, as assessed by measurements of cancellous bone volume, radiographic density, cortical thickness and three-point breaking strength. 3. Humeri from birds in the Litter an ...
... Broiler males were given a series of feeds from 0 to 8 wk having all nutrients advocated by the NRC (1984) and were compared with birds offered feeds with available P continuously 10% below recommendation. At termination, birds in pens were divided for cooping, and coops were either subjected to 6 h of truck transportation and 4 h of preslaughter rest or held stationary for 10 h. High summer tempe ...
strength training; risk factors; osteoporosis; bone fractures; bone density; females; middle-aged adults; elderly; menopause; human health; clinical trials; muscle strength; Massachusetts
Abstract:
... Objective. - To determine how multiple risk factors for osteoporotic fractures could be modified by high-intensity strength training exercises in postmenopausal women. Design. - Randomized controlled trial of 1-year duration. Setting. - Exercise laboratory at Tufts University, Boston, Mass. Population. - Forty postmenopausal white women, 50 to 70 years of age, participated in the study; 39 women c ...
... Antagonistic interactions between silicon and aluminum occur in living organisms. Thus, an experiment was performed to ascertain whether high dietary aluminum would accentuate the signs of silicon deprivation in rats and conversely whether silicon deprivation would accentuate the response to high dietary aluminum. The experiment was factorially arranged with two variables: silicon as sodium metasi ...
calcium; nutrient intake; bioavailability; bone density; histology; bone mineralization; rats
Abstract:
... The effects of varied calcium bioavailability on bone development (young animal) and bone maintenance (aged animal) were evaluated by the application of bone composition and histologic/histomorphometric techniques. Groups of male young (3-4 weeks old) and aged (24-month-old) rats were fed nutritionally-complete but calcium-restricted (0.15%) diets in which calcium was derived from spinach or nonfa ...
... The effects of three diets--high meat (HM), low meat (LM), or low meat with mineral supplements (LS)--on zinc absorption, elemental balance, and related clinical indexes were investigated in a metabolic study of 14 women aged 51-70 y. The women ate each of the three diets for 7 wk in random order. Lean beef, chicken, ham, and tuna in the HM diet replaced foods with a low mineral content in the LM ...
hens; ambient temperature; dietary minerals; calcium; egg weight; laying performance; specific gravity; feed intake; metabolizable energy; methionine; cystine; Recommended Dietary Allowances; body weight; bone strength; bone density; blood plasma; phosphorus; production costs; dietary mineral supplements
Abstract:
... An experiment was conducted to determine whether optimizing profits, as well as eggshell and skeletal strength, by manipulation of dietary Ca level has any influence on either egg weight, egg production or feed consumption during the first 12 wk of production (Weeks 20 to 32, Phase 1). Hens were housed at two environmental temperatures (15.6 to 23.3 and 21.1 to 28.9 C) and fed six diets from 20 to ...
alcohols; bone density; calcium; carbonated beverages; estrogens; exercise; obesity; public health; thiazides; thyroid hormones; tobacco
Abstract:
... The association between carbonated beverage consumption and bone mineral density was examined in a community-based cohort of older White women. One thousand women 44 to 98 years of age had bone mineral density measured at four sites and provided medical and behavioral histories, including type and quantity of carbonated beverages consumed. Bone mineral density levels were not associated with intak ...
nutrition-genotype interaction; physical activity; nationalities and ethnic groups; bone density
Abstract:
... The mass of a bone is given by its volume and its apparent density-mass per unit external volume. Most measurements of so-called density are of mass incompletely normalized by some index of bone size. Genes control about 60% to 75% of the variance of peak bone mass/density and a much smaller proportion of the variance in rate of loss. Genetic influences on bone mass/density are mediated in large p ...
... The effects of a total bone extract (TBE), a new mineral preparation made from bovine bone rendered soluble by lactic acid and citric acid under decompression, on the bone metabolism and apparent calcium absorption were examined for an ovariectomized (OVX) rat model of osteoporosis. The apparent calcium absorption from TBE was significantly higher than that from calcium carbonate. There were no si ...
caffeine; bone density; coffee (beverage); girls; adolescents
Abstract:
... Objective: This study was conducted to determine whether dietary caffeine consumed by American white females between ages 12 to 18 affects total body bone mineral gain during ages 12 to 18 or affects hip bone density measured at age 18. Methods: The Penn State Young Women's Health Study is a longitudinal investigation of bone, endocrine and cardiovascular health in non-Hispanic, white, teenage wom ...
disease diagnosis; dogs; humerus; bone diseases; bone mineralization; bone density; radiography; computed tomography; lameness; surgery; case studies; clinical examination
broiler chickens; dietary protein; summer; metabolizable energy; ambient temperature; body weight; gait; tibia; gender differences; bone strength; radiography; bone density; length; width; Turkey (country)
Abstract:
... 1. The study was conducted to investigate the effect of dietary protein on the walking ability and bone parameters of broilers reared under summer temperatures which ranged from 26 degrees to 32 degrees C (+/- 2 degrees C). 2. Three different dietary protein combinations were used. The diets (per kg) were: low protein with 205 g crude protein and 12.94 MJ ME, 184 g crude protein and 12.75 MJ ME; m ...
hens; dietary minerals; calcium; phosphorus; eggs; specific gravity; egg shell; weight; laying performance; body weight; bone density; egg weight
Abstract:
... A 6-wk study was conducted to determine the influence of supplemental phytase on Ca and P utilization in commercial laying hens. Diets were arranged factorially with three levels of dietary Ca (2.5, 2.8, and 3.1%), fed at two levels of nonphytate P (0.1 and 0.3% NPP) with and without supplemental phytase. Each diet was replicated eight times, with 16 hens per replicate. Criteria evaluated included ...
Leucaena leucocephala; anorexia; biotechnology; bone density; diet; excreta; femur; mimosine; mineral content; toxicity
Abstract:
... Further studies of mimosine toxicity in broiler chicks were done to clarify a possibility of osteopathy. The mineral content and density of femur and the strength, ductility, and toughness for the index of mechanical properties significantly decreased in the 1% mimosine group, compared with those in the control and restricted groups. The stiffness had a decreasing tendency in the 1% mimosine group ...
body weight; calcium; bone density; neonates; postnatal development; United States
Abstract:
... Objective: To determine postnatal development in bone mineral status and its relationship to anthropometric measurements and other physiologic variables during the first year. Methods: Cross-section observational study of total body bone mineral content (TB BMC) and density (TB BMD) of 130 healthy infants (71 male and 59 female with 63 white and 67 African American) between 1 and 391 days. Whole b ...
skeletal development; nutrient intake; diet; school children; nutritional status; girls; body weight; physical activity; calcium; age; energy expenditure; height; bone density; body fat
Abstract:
... Objective: To examine the relation of anthropometric and growth parameters (weight, stature, body composition, age, and skeletal age), nutritional factors, and physical activity to the total body and radius bone mineral density and content and radiogrammetry parameters of the second metacarpal. Study design: The study was a cross-sectional evaluation of 456 healthy, Caucasian girls, ages 8 to 13 y ...
experimental design; tibia; body weight; bone mineralization; mice; bone density; computed tomography; estradiol; accuracy
Abstract:
... The purpose of this study was to assess peripheral quantitative computed tomography (pQCT) imaging for measurement of volumetric bone mineral density (BMD) in vivo in mouse tibia following ovariectomy, and following treatment with 17β-oestradiol (E2). Two studies were undertaken. In study 1, three groups (n=10) of mature mice were ovariectomized (OVX) or sham operated (SHAM); one of the OVX groups ...
women; physical activity; physical fitness; bone fractures; bone density; calcium; nutrient intake; risk factors; food intake; height; body weight; age; smoking (habit); menstrual cycle; nationalities and ethnic groups; energy expenditure
Abstract:
... Objective. To identify characteristics and factors associated with increased risk for stress fractures in military women. Design: Case-control study to retrospectively examine physical activity, prior calcium intake, and bone density as predictors of stress fractures. Setting: A military training installation which incorporates physical training for women. Subjects: Forty-nine female soldiers with ...
bone density; food composition; bone mineralization; phosphorus; raw foods; corn flour; nutrient uptake; mineral content; bone strength; protein composition; weight; food processing quality; tortillas; calcium; extrusion; nixtamalization; rats; extruded foods; nutritive value; magnesium; animal models; femur
Abstract:
... The nutritional quality (chemical and biological assays) was evaluated for tortillas made with two samples of instant corn flour prepared with 0.15 and 0.25% calcium hydroxide and processed either by extrusion or by the traditional process (nixtamalization). Both raw corn and the tortillas made from instant whole corn flours prepared by extrusion (TEP) had higher Protein Efficiency Ratio (PER), an ...
... Skeletal problems are common in both young and old poultry and are often related to bone weakness. They affect mortality on the farm and condemnations within processing plant and thus raise both welfare and economic concerns. To understand the basis of bone strength, the metaphyseal histology, composition, and the biomechanical properties of tibiae from 7- and 72-wk-old male and female broiler bre ...
Mizuhopecten yessoensis; absorption; bioavailability; biotechnology; blood serum; bone density; bone metabolism; calcium; citrates; fossils; lactic acid; mineral content; ovariectomy; shellfish; solubility; solubilization; tibia
Abstract:
... Fossil shellfish powder (FS) and Ezo giant scallop shell powder (EG) were rendered soluble with lactate and citrate under decompression (FSEx and EGEx, respectively) and we examined the effects of lactate-citrate solubilization of FS and EG on mineral absorption, tissue mineral contents, serum biochemical indices and bone mineral density (BMD) in ovariectomized (OVX) rats. The apparent absorption ...
... The whole genome scan for quantitative trait loci (QTLs) specifying peak bone mass was performed with the F₂ intercrosses of SAMP6, an established murine model of senile osteoporosis, exhibiting a significantly lower peak bone mass, and SAMP2, exhibiting a higher peak bone mass. Cortical thickness index (CTI), a parameter of bone mass of femurs, was measured in 488 F₂ progeny at 4 months of age, w ...
broiler chickens; feed additives; calcium; body weight; feed conversion; animal performance; dosage; bone density; mortality; phosphorus; mineral content; bone strength; dietary mineral supplements
Abstract:
... The influence of dietary phytase on phytase P availability was investigated using Ross x Hubbard male broiler chicks. A randomized complete block design with a factorial arrangement of 2 x 3 was used with eight replicates (n = 2,400; 50 chicks per replicate) per treatment. Diets were formulated to contain two levels of nonphytate P (NPP; 0.225 and 0.325%) and three levels of phytase [0, 300, and 6 ...
ducks; feed additives; dosage; metatarsus; femur; tibia; blood plasma; phosphorus; liveweight gain; feed intake; feed conversion; bone density; mineral content; bone strength; length; diameter; dietary mineral supplements; thickness
Abstract:
... Two experiments (Exp.) were conducted to determine the growth response of White Pekin ducks to inclusion of microbial phytase in finisher diet. In Exp. 1, 1-d-old male ducks (240 total) were reared in litter-floor pens and fed regular starter diet until 3 wk of age. At 3 wk of age, ducks were randomly divided into six groups of 10 ducks each and each group was fed one of four diets. Three finisher ...
broiler chickens; somatotropin; injection; feed conversion; embryogenesis; egg hatchability; body weight; breast muscle; weight; liver; heart; legs; shear strength; gender differences; tibia; bone strength; length; bone density
Abstract:
... The effect of in ovo administration of chicken growth hormone (cGH) on growth rate and efficiency of gain, organ, and long bone growth of 42-d-old broiler chickens was investigated. Eggs were injected once with 100 microliters vehicle (0.03 M NaHCO(3), 0.15 M NaCl, pH 8.3) per embryo or vehicle containing 100 ng cGH/100 microliters per embryo (n = 630 eggs total) on one of the following Days: 1, 4 ...
... Genetic analyses for loci regulating bone mineral density have been conducted in a cohort of F₂ mice derived from intercross matings of (C57BL/6J × CAST/EiJ)F₁ parents. Femurs were isolated from 714 4-month-old females when peak adult bone density had been achieved. Bone mineral density (BMD) data were obtained by peripheral quantitative computed tomography (pQCT), and genotype data were obtained ...
... Objective: The purpose of this study was to describe the accumulation of whole body bone mass in a longitudinal study of prepubertal boys and girls using Roche's physical maturity index as a measure of developmental age. Methods: We measured 561 children (39% white, 61% African-American) from a suburban school district, representing an ethnically mixed, middle-class community adjacent to Detroit. ...
women; caffeine; bone mineralization; bone density; risk factors; epidemiology; physical activity; hormone supplements; smoking (habit); nutrient intake
Abstract:
... Objective: Caffeine consumption has been proposed as a risk factor for bone loss in postmenopausal women. Past epidemiologic studies on caffeine and bone have been confounded by covariates including cigarette and alcohol use, differing levels of physical activity and hormone replacement therapy. The purpose of the study was to use a longitudinal design to determine the relationship between habitua ...
turkeys; dietary minerals; phosphorus; dosage; calcium; body weight; feed conversion; tibia; bone density; dyschondroplasia; alkaline phosphatase; enzyme activity; leg weakness; blood plasma
Abstract:
... Female and male turkeys were fed 110, 73, 52, and 30% of the NRC (1994) nonphytate P (NPP) requirement without and with 500 phytase units (FTU)/kg during 4 to 14 or 16 wk of age, respectively. At 110% P (control; also 110% of NRC Ca), phytase was without effect. At 73% of NPP (100% Ca), without phytase, performance was similar to the control; with phytase, performance was equivalent, and in some s ...
metabolism; nutritional status; disease prevention; calcium; health promotion; developmental stages; nutrient deficiencies; lifestyle; bone density; osteoporosis; genetic variation; ultrastructure; phosphorus
Abstract:
... Osteoporosis is a complex, multi-factorial condition characterized by reduced bone mass and impaired micro-architectural structure, leading to an increased susceptibility to fractures. Although most of the bone strength (including bone mass and quality) is genetically determined, many other factors (nutritional, environmental and life-style) also influence bone. Nutrition is important modifiable f ...
mineralization; radiography; bronchi; bone diseases; dogs; bone density; obesity; Cushing syndrome; diabetes; hypothyroidism
Abstract:
... The specificity of conventional radiography in assessing canine hyperadrenocorticism was evaluated by comparing the incidence of related radiographic findings in 24 hyperadrenocorticoid, 15 diabetic and 20 hypothyroid dogs. Hyperadrenocorticoid dogs showed significantly more perihilar bronchial mineralisation than other groups. There was no significant variation between the disease groups with res ...