Milk samples from three Jersey and three Holstein herds were used to determine if the degree of churning correlated with the initial milkfat assay, and also to determine if the churned milkfat could be measured as accurately as the initial milkfat using the Milko-Tester. Regression lines for the initial milkfat test versus churned milk- fat test fit polynomial curves. The degree of churning was greater for Jerseys than Holsteins and correlated with the initial milkfat test. The repeatability of initial milkfat tests vas 0.98 for Jerseys and 0.99 for Holsteins. However, the repeatability of churned milkfat tests was lower for both breeds, especially for Jerseys. This indicated that the churned sample could not be measured for its milkfat content as accurately as the nonchurned sample. Churned milkfat samples all tested lower than initial milkfat samples, thus the Milko-Tester Mark III was unable to provide an initial fat test estimate following sample churning. Cows were different from each other in the difference between initia1 and churned milk fat tests. This suggested that cows which produce milk with a higher tendency for churning are apt to receive less reliable milkfat tests from central laboratories than other cows, when all milk samples are subjected to churning conditions.

Investigations were carried out to project the food needs of the world population by 2000 A. D., and to explore the possibilities of meeting these requirements. About 70 percent of the world populations presently living in developing countries do not get adequate diets, and suffer from many diseases of under- nutrition and malnutrition. they are unable to increase food production themselves. People in the developed nations have enough food and their food production is increasing at a rate faster than the rate of growth of population. Cultivable land is the main source of food for man. The seas can also be relied upon for high quality food. At present, both of these sources are not fully exploited. The amount of fresh water available can be efficiently used to irrigate additional land. Food production in the developing countries could be more than doubled by the use of modern technology. The use of machine:ry, genetically improved crop varieties, fertilizers, pest control, storage and preservation, and distribution facilities can make valuable contributions towards food production and utilization. Much of the world's malnutrition and under-nutrition is due to ignorance. Food habits and cultural practices need to be changed. People should learn to make the best use of the food available to them. The deficiencies of essential nutrients in the diets can be met by supplementing the grains with synthetic and substitute foods which could be produced on a large scale from locally grown grains and offered at reasonable rates. The majority of the people in the developing countries are illiterate. They must be educated, but this will take time. Technical education deserves priority over other education. A high rate of population increase is accompanied by a high percentage of children in the population. A large part of the national income is spent on these children and there is little capital formation. This inhibits economic progress. The developing countries have realized this now and some of them have adopted official population policies. The developed nations and many international agencies have come forward to help the developing countries to increase food production and to check population growth through family planning programs. The new birth control devices; namely, the pill and the intrauterine contraceptive device (IUD or IUCD) , promise great hopes. The developing countries should make the best use of the capital and technicians loaned to them and attain a self sustaining economic growth. During the last two decades, Mexico and Israel have increased their food production by about 250 percent. New varieties of rice and wheat have been developed in the Philippines and Mexico and are being adapted to the South East Asian countries. Present technology is capable of increasing world food production many fold. The same technology can also be employed to control the abnormal growth of population. Perhaps the world will have no difficulty in feeding its population adequately by 2000 A. D.

Venison is an important food item in the diet of the people of the United States. Deer is hunted both as sport and for food. Annually, nearly 180,000 hunters go afield in Utah in search of deer. Over 130,000 animals are killed which amounts to an annual harvest of over 15,000,000 pounds of dressed venison. This contributes about 10 1/2 million dollars to the economy of the state from licenses, lodgings, transportation, and other expenses of hunting. Venison as a whole has characteristic flavor and/or odor which is acceptable if mild, but some venison has an objectionable strong flavor. Because of the practical importance of the subject of venison flavor, this investigation has been undertaken to study the substances suspected of contributing to the flavor.

Three-day dietary records were analyzed for nutrient content and 24 hour urine samples were analyzed for calcium, phosphorous, total nitrogen, and free alpha-amino nitrogen for 210 elderly people. Dietaries and urine samples were collected twice, October and March at five month intervals, for each subject. Increases were found in both dietary intake and urinary components October to March. Based on a criteria of high dietary protein, low dietary calcium, high urinary nitrogen and low calcium, 23 subjects were selected as osteoporotic and and 25 were selected as non-osteoporotic. This method of prediction was not supported by radiological evaluations. Bone density and percent cortical area of the second metacarpal and the trabecular pattern of the femoral head were evaluated for each subject. A negative correlation of trabecular pattern with age indicated a general loss of bone with age. Decreased percent cortical area was the most consistent bone phenomena associated with osteoporosis. No significant difference was found between sexes in any of the radiological analysis. The osteoporotic condition is more closely associated with a loss of bone quantity than decreased bone quality. As yet, osteoporosis is not associated with specific nutrient(s) consumption or urinary excretion(s).

College is a time of emerging identity and habit formation for students. One hundred and sixty-two (162) college students were surveyed via an internet based survey. The survey asked questions regarding dietary habits such as consumption of dairy, vegetables, fruit, and protein. The survey also examined dietary knowledge such as ability to read food labels. The students were divided into two groups for analysis, nutrition majors and non-nutrition majors. The two groups differed in Body Mass Index (BMI) (p=0.004), but not nutrition knowledge (p=0.082). The nutrition students had an average BMI of 22.0+/-2.42 and a nutrition knowledge score of 2.44+/-0.60, while the non-nutrition majors had an average BMI of 23.9+/-4.50 and a knowledge score of 2.22+/-0.55.

Forty-nine female rats initially weighing about 95 grams were used in this experiment to determine the effect of contraceptive hormones on body composition in zinc deficient and zinc supplemented rats. Four treatment groups were: 2 ppm of dietary zinc with daily contraceptive steroid injections, or with placebo injection, and 140 ppm of dietary zinc with contraceptive steroid injection or with placebo. The daily injected steroids consisted of 0.lug of Ethynyl Estradiol and 0.lmg of Medroxyprogesterone in 0.lml of corn oil. Non-hormone treated groups received O.lml of plain corn oil. All injections were administered into the Gluteus Maximus muscle. Food intake, weight gain and serum zinc level were determined weekly. After eight weeks of experimental treatment, animals were killed by decapitation. Livers, adrenals and ovaries were removed, weighed and frozen until cholesterol determinations could be made. The remaining carcass minus the intestinal tract was autoclaved and homogenized. Carcass moisture, ash, total lipid and cholesterol ester levels were determined. Carcass zinc and calcium levels were also determined. The results indicate that zinc deficiency causes a marked loss of appetite with a reduced growth rate and a reduced feed efficiency in the growing female rats. Serum zinc level was also reduced. Rats fed the zinc deficient diet had smaller ovaries than the controls, but their adrenal weights were unaffected. Total cholesterol content of the adrenals was, however, increased. Zinc deficient diet caused a significant elevation of carcass cholesterol esters and carcass water content, and tended to decrease liver cholesterol level. Carcass ash concentration was increased in zinc deficient rats on the basis of fat free samples. Hormone injection caused a slight reduction in growth rate, irrespective of zinc intake, although it slightly improved appetite in the zinc deficient rats, and which caused a slight further decrease in serum zinc level. The relative weight of adrenals and ovaries were significantly decreased by hormone administration, having markedly increased total cholesterol levels. Hormone treatment tended to increase carcass cholesterol ester and liver cholesterol levels. In zinc supplemented rats, carcass total lipids was reduced, while carcass lipid was elevated in zinc deficient rats by hormone injection. Hormone treatment elevated carcass ash content with an increase in its calcium and zinc content which was statistically significant. This increase indicates the anabolic effect of contraceptive steroids on mineral in general.

The effects of altering pH and calcium level during whey protein extrusion were assessed by measuring the protein solubility and WHC of the textured whey protein (TWP). TWP samples were produced by extruding dry mixtures of 2/3 WPC 80 (80% protein) and 1/3 cornstarch using screw speed of 200 rpms, feed rate of 23 g/min, water flow rate of 11 g/min, and product temperature of 150°C. The levels of acid and base were adjusted by adding concentrated HCl or NaOH, respectively, to the water source. Calcium was added to the raw mix in the form of calcium chloride dihydrate before extrusion at levels of 0.4%, 0.88%, and 1.69% calcium per protein (w/w). It was shown that WHC of TWP was increased (p < 0.05) by extrusion with water. WHC was further promoted by extruding with increased levels of base. Solubility of whey protein in water was reduced by extrusion, especially when extruded with added acid or calcium. The practicality of using hydrated TWP in beef patties was determined using sensory, physical, and instrumental analysis. An open consumer panel was conducted on six beef patty samples: 1) 100% beef, 2) 30% TWP extruded with 0.2 M NaOH (TWP0.2MNaOH), 3) 30% TWP extruded with 1.69% calcium (w/w protein) added (TWP1.69%Ca2+), 4) 30% TWP extruded with water (TWPH2O) , 5) 30% TWP extruded with 0.1 M HCl (TWP0.1MHCl), and 6) 30% textured soy protein (TSP). It was found that patties containing 30% TWP0.2MNaoH were equal (p < 0.05) to 100% beef patties in tenderness, juiciness, texture, flavor, and overall acceptability, and well above the scores for patties with 30% TSP. TWP0.2MNaoH was then tested by sensory, physical, and instrumental analysis at three usage levels, 30, 40, and 50%, against 100% beef patties. Patties with up to 40% TWP0.2MNaOH were well accepted (p < 0.05) by consumers, and had higher cook yield, less diameter reduction, and less change in thickness than 100% beef patties. These results suggest great potential for the use of textured whey protein as a meat extender.

The influence of feeding juvenile female leopard tortoises (Geochelone pardalis, n=18) a commercially available, complete, extruded feed three (3) or seven days (7) per week on dry matter and digestible energy intake, apparent digestibility of dry matter, organic matter, gross energy and fiber fractions, animal body weight and measurements, digesta transit time, rate of passage, and indigestible fill was evaluated. Both feeding frequencies are commonly practiced with captive tortoises. When fed 7 compared to 3 days per week, dry matter and digestible energy intake was greater. Tortoises gained more g BW, but not when adjusted per kg initial BW. When fed 7 compared to 3 days per week, tortoises grew more in plastron width (PW) and carapace height (CH), but not midline straight carapace length (MSCL), and grew more in calculated shell volume (i.e., a calculated estimate of shell volume using MSCL, PW, and CH), with a higher calculated body condition index (BCI). Providing short fasts (i.e., feeding 3 compared to 7 days per week) may be useful in slowing tortoise growth when animals are provided food ad libitum. In general, ad libitum feeding, especially of a highly digestible extruded feed, is not recommended for captive juvenile G. pardalis, especially when offered food daily. With two data points (detected as outliers) removed due to low fecal output (and resulting unrealistically high apparent digestibility of all nutrients analyzed) of two animals when fed 3 days per week, apparent digestibility of cellulose in tortoises fed 7 (n=18) compared to 3 (n=16) days per week was lower, but no differences were detected in DM, OM, GE, or any other fiber fractions analyzed. Transit time (TT1) was shorter and indigestible fill was higher in tortoises (n=18) fed 7 compared to 3 days per week, regardless of percent Cr marker recovered. With four animals removed due to <50% Cr marker recovery, tortoises fed 7 compared to 3 days per week exhibited shorter mean retention time (RGIT), with no differences in digesta transit or indigestible fill. Longer digesta retention when food availability included short periods of fasting may have allowed tortoises to extract more energy from cellulose.

The Honey Sweet carrots were canned with Ethyienediamine tetracetic acid (CaNa 2 EDTA) and Sodium hexametaphosphate (Ha-HMP) at five different water hardness (0 , 20, 40, 80, 160 ppm of calcium and 20 of magnesium) , then stored at temperatures of 70 and 100 F. Evaluations were made at sixty-day i intervals for six months. Firmness and color degradation decreased significantly when water hardness or storage time increased. Under storage at 100 F and 0 hardness of water, the decrease of color and firmness was constantly accelerated. When hard water (above 80 ppm or below 40 ppm) was used for canning Van sweet cherries and Large Early Montgament apricots, the firmness , volatile reducing substances, and pH decreased. Sensory acceptability was maximum at 40 and 80 ppm. However, when either CaNa 2 EDTA or Na-HMP was used at the 500 ppm, it was found that they counteracted the effects of hard water and the quality of canned sweet cherries and apricots improved, when compared with control.

Osteoporosis is responsible for approximately 1.3 to 1.5 million fractures per year in the United States. The risk of osteoporosis increases with age, especially among postmenopausal women, and with lifestyle factors such as the use of certain drugs, heavy alcohol consumption, cigarette smoking, high caffeine intake, and sedentary living. Genetic factors that may influence susceptibility to osteoporosis include a positive family history of the disease, or a low weight - for-height ratio. In some cases, race and geographic location may increase or decrease the risk of osteoporosis. Known protective factors include obesity, estrogen replacement therapy, weight bearing exercise, and possibly calcium, fluoride, and Vitamin D. Although several studies have examined multiple factors in single populations, few comparisons have been made between populations within the same country. Recent epidemiological studies have shown that the Utah population has lower rates of some chronic diseases than the national average. In this study, we used a questionnaire approach to relate the incidence of osteoporotic fracture to 28 lifestyle, dietary, physical, and geographic factors in postmenopausal women between a Utah population and a combined population from North Dakota, South Dakota, and Colorado. Logistic regressions were used to determine the probability of osteoporosis for these two populations and to determine which factors significantly (P ≤ 0.05) increased or decreased the incidence of osteoporosis. The following factors were significantly related to the occurrence of osteoporosis: age, race, arthritis, cortisone, and fluoridated water. Dietary factors, including calcium, were not significantly related to osteoporosis in this study. The model successfully predicted the occurrence of an osteoporotic event in 72% of the cases.