Giane Roberta Jansen

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A new method was developed that enables milk yield to be estimated from pup weight and pup weight gain in well-nourished rats. Daily milk yield, body weight, and daily weight gain were measured over 4-5-day periods in 38 suckling pups aged 3-13 days postpartum. Each 24-h period was divided into consecutive 6-h cycles, during which dams and pups were(More)
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.(More)
An interlaboratory study involving protein efficiency ratio (PER), net protein ratio (NPR), relative NPR (RNPR) and relative nitrogen utilization (RNU) was carried out. Six collaborators assayed 6 samples, including casein plus methionine which was used as a reference protein. Collaborators prepared their own diets and analyzed the diets for nitrogen. Test(More)
1. Studies in vivo have been carried out on hepatic and extrahepatic cholesterol synthesis and also on the effects of starvation and re-feeding on both cholesterol and fatty acid synthesis. 2. In rats and mice fed on a stock diet, extrahepatic tissues accounted for about 4 times as much newly synthesized cholesterol as did the liver. The liver appeared to(More)
This study compared the effectiveness of a nutrient-based (diet guide) approach with that of a food-group (exchange lists) approach to menu planning for persons with noninsulin-dependent diabetes. Each method was presented to four groups in three-session workshops emphasizing meal planning to reduce risk of heart disease. The diet guide method evaluated(More)
The effects of dietary protein and environmental conditions on lactation performance in rats were evaluated. Female rats were fed from conception until day 9 of lactation diets containing 21% wheat protein (21W), 21% casein + methionine (21CM) or 11% casein + methionine (11CM). At parturition, dams were kept in their normal environment (20 degrees C) or(More)
Free amino acid levels were determined in serum, mammary gland, liver and muscle during lactation in rats fed diets varying in protein. Using a 3 X 2 factorial design, after conception female rats were fed purified diets varying in protein quality (wheat, wheat + lysine + threonine or casein + methionine) and in protein level (11.6% vs. 22.3%). On d 15 of(More)
Rates of protein synthesis were measured in mammary gland, liver, intestinal mucosa and muscle of lactating rats by using a flooding dose of [3H]phenylalanine that was injected into diethyl ether-anaesthetized dams via a lateral vein or into undisturbed dams via a jugular cannula. Ether anaesthesia did not alter rates of protein synthesis significantly in(More)
Rate of protein synthesis in mammary tissue and liver as well as pup weight and milk yield were measured at d 15 of lactation in rats fed throughout gestation and lactation diets that varied in protein quality (wheat, wheat supplemented with lysine and threonine or casein supplemented with methionine), protein quantity [11 or 21% (wt/wt)] and feeding level(More)
A series of experiments was carried out in which effects of dietary protein and energy on protein synthesis during lactation were evaluated. Purified diets were fed to female rats from conception until d 15 of lactation. Protein supplied by wheat gluten, gluten + lysine + threonine or casein + methionine was fed at 20 or 25% in the diet. Protein synthesis(More)