Search Results
Results 301 - 350 of 524
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Bannink A - - 1999
The present study was designed to describe the relationship between mineral metabolism and urine production by lactating dairy cows. Regression studies were performed to predict urine volume from either observed concentrations of K, Na, and N in urine or observed intakes of K, Na, and N. In addition, empirical equations ...
Cantani A - - 1999
Cow's milk is one of the first foreign proteins ingested by infants and is one of the most common and potent food allergens. The presence of cow's milk is widespread due also to its unlabelled inclusion as an ingredient, or to errors in cooking, processing and preparation, and in restaurant ...
Reksen O - - 1999
Relationships between light exposure, milk yield, and reproductive traits in Norwegian Red cattle were studied using data from 1538 farms in southern Norway during the darkest part of the year (November 1 to February 28). Production level was expressed as milk yield at first artificial insemination (AI) and 305-d milk ...
Rushen J - - 1999
To examine the ability of cows to recognize people and the effects of the fear of people by cows at milking, cows (n = 14) were handled by two people; one handled the cows gently, and the other handled them aversively. The handlers wore clothes of different color. After handling, ...
Lignot B - - 1999
The effect of the composition of the solvent on the peptic hydrolysis of bovine haemoglobin was studied to improve the preparation of two opioid peptides. Peptic hydrolysis was performed for 24 h at 23 degrees C in 0.1 M sodium acetate buffer, pH 4.5. A HPLC method was reported for ...
Nohara D - - 1999
Refolding of reduced and denatured Streptomyces griseus trypsin (SGT) was investigated. In the standard buffer of 50 mM Tris-HCl, the refolding yield of 1 microg/ml of SGT did not exceed 15%. This low yield was assumed to be due mainly to autoproteolysis and/or aggregation occurring concurrently with refolding. On the ...
Abdalla A L - - 1999
Productivity in most Brazilian dairy herds is low and depends exclusively on pasture. To study the productive potential of pastures and to devise strategies to further improve pasture and animal productivity in this production system, studies were carried out to obtain basic on-farm information. The constraints which affect productivity and ...
Yamagishi N - - 1999
Three parturient cows in lateral recumbency which were moaning and had tachycardia, arrhythmia and dyspnoea were thoroughly examined. They were hypocalcaemic (0.70-1.27 mmol/litre) and were euthanized within four days, because they failed to respond to calcium treatment. By light microscopy the most characteristic pathological changes in the heart were necrotic ...
Thompson J A - - 1999
OBJECTIVE: To describe effects of season on milk production in Holstein dairy cows and to determine the location and effectiveness of fans and sprinklers in the management of stress attributable to season. DESIGN: Longitudinal observational study. ANIMALS: 141 dairy herds for which owners used the Dairy Herd Improvement Association's database ...
Takahata Y - - 1999
There is wide interest in the effects of reproductive biology, mating partner preference, and rank on mating success (MS) and reproductive success (RS) in primates. In particular, theory stresses importance on the mechanisms for attaining RS. Most theory hedges on competitive ability and priority of access to resources, whether they ...
Stahl T J - - 1999
This study evaluated factors that affected decision making and changes within the Minnesota dairy industry. The 50 herds selected for this study had at least 75 cows registered with the Dairy Herd Improvement Association in 1993 and were selected based on the total percentage increase in milk production on the ...
Hortet P - - 1998
Relationships between clinical mastitis and milk yield and composition in dairy cows were reviewed. Requirements for inclusion were: data had to be collected after 1975; dependent variables for milk yield and milk composition had to be defined at the cow level; mastitis cases had to be defined by clinical signs, ...
Meinert T R - - 1998
To determine whether the accuracy of the genetic evaluations of sires can be assessed by the presence of extreme daughter records, we studied herd-years with records from first-crop daughters of 217 Holstein bulls that were not sampled by artificial insemination (AI) organizations but that later entered AI. The presence of ...
Rodriguez-Zas S L - - 1998
A Bayesian analysis was undertaken to assess the susceptibility of Holsteins to mastitis from 120 to 305 d in milk. Data included 595 lactations from 267 cows. The response variable was presence or absence of intramammary infection; explanatory variables were period and season of calving, somatic cell score, and cow. ...
Licitra G - - 1998
This study was undertaken to investigate research and outreach priorities for Progetto Ibleo (Project Ibleo), a center created in 1990 with tripartite government funding to serve dairy producers in the Hyblean region of Sicily. Data comprised values for production and composition of milk from 1984 to 1989 from 35 herds ...
Kahi A K - - 1998
The ranking of genotypes (i.e., breeds and breed crosses) for economic performance depends on the production circumstances of the herd and the criteria for economic evaluation. In this study, the effects of evaluation criteria and production circumstance are quantified using data from the literature on six genotypes. The economic evaluation ...
McNeill M S - - 1998
Twenty-nine selected styles of subprimals or sections of veal were obtained from a commercial facility to assist in the development of a support program for retailers. They were fabricated into bone-in or boneless retail cuts and associated components by trained meat cutters. Each style selected (n = 6) was used ...
Braverman Y - - 1998
Injuries caused by the German yellow jacket Vespula germanica F. to dry and lactating dairy cows (Bos tourus) in 5 herds in Israel were monitored and adversely affected < or = 65% of the cows. Elimination of large alternative protein sources (placentas, sewage containing milk from the milking parlor), and ...
Braverman Y - - 1998
During the past two decades, parasitism by the German yellow jacket wasp, Paravespula germanica, on lactating dairy cattle has occurred in Israel during August to October annually, affecting up to 65% of cows in certain herds. The nibbled and exposed tissues of teats and sometimes udders become infested by bacteria, ...
Schmidtmann E T - - 1998
As a measure of the risk for exposure to Lyme disease, we estimated the distribution of host-seeking adults of the blacklegged tick, Ixodes scapularis Say, on dairy farms in Barron County in northwestern Wisconsin. Vegetation ecotypes that were common to 18 farms that were representative of the county were surveyed ...
Allore H G - - 1998
In the future, the Pasteurized Milk Ordinance may make milk quality standards more stringent by lowering the somatic cell count (SCC) limit on Grade A raw milk to 500,000/ml. Therefore, using a discrete event simulation model, we investigated the effects of the prevention of intramammary infection (as recommended by the ...
Elbers A R - - 1998
The incidence of clinical mastitis in dairy cows was estimated in 171 randomly selected dairy herds from the southern part of The Netherlands. A total of 1103 quarter cases was reported. The mean annual incidence rate was 12.7 quarter cases/yr per 100 cows. The modeling incidence rate of clinical mastitis ...
Sargeant J M - - 1998
The objective of this study was to describe the frequency of occurrence of clinical mastitis in dairy herds in Ontario. The study group consisted of 65 dairy farms involved in a 2-year observational study, which included recording all clinical mastitis cases and milk sampling of quarters with clinical mastitis. Lactational ...
Calvani M M - - 1998
A 5-year-old atopic boy unaffected by cow's milk protein allergy experienced several anaphylactic reactions after eating food containing "pecorino" cheese made from sheep's milk. Prick-prick tests were strongly positive to sheep's buttermilk curd and 'pecorino' sheep's cheese. Skin prick tests to fresh sheep's milk and to goat's milk were also ...
Fukushima Y - - 1997
Food antigens transferred into breast milk sometimes cause an allergic reaction in exclusively breast-fed infants. This study will show whether the intake of a whey hydrolysate formula for lactating women (MOM HA) can reduce the appearance of food antigens in breast milk. Lactating women in the MOM group (n = ...
Lampe J B - - 1997
Thirty-four toddlers were studied in a prospective, convenience sample comparison at their 18-month health supervision visit to examine the effect of prolonged (i.e., to 18 months of age) bottle feeding on both the daily volume of cow's milk intake and the toddler's iron stores (serum ferritin concentrations.) Seventeen toddlers had ...
Casey G M - - 1997
1. The size of cows and their unpredictable behavior constitute a hazard for workers who handle them. 2. When cows are startled by sudden movements and unfamiliar situations, they may kick, push, knock down, fall, or step on workers. 3. Cows in heat or those with calves are particularly excitable. ...
Stocker S - - 1997
OBJECTIVE: To analyze myoelectric activity of the cecum and proximal loop of the ascending colon (PLAC) in cows after spontaneous cecal dilatation/dislocation (CDD) and compare it with that in healthy cows after surgical evacuation of the cecum. ANIMALS: 12 cows with spontaneous CDD and 6 healthy cows (group C). Cows ...
Wright S M - - 1997
Under the Arctic Monitoring and Assessment Programme (AMAP), studies have been undertaken to compare potential fluxes of radiocaesium via important food products. The results for three Norwegian Arctic counties are presented in this paper. The comparative importance of different foodstuffs in contributing to collective dose varies spatially due to differing ...
Troutt H F - - 1997
The authors provide an overview of the circumstances associated with culling of dairy cattle in the United States of America (USA) and focus on the possible significant microbiological hazards associated with meat from cull dairy cows. Cull dairy cows are an important source of food in the USA, accounting for ...
Tauer L W - - 1997
Data from 259 farms that participated in the Cornell University Dairy Farm Business Summary Project were used to measure the impact of bovine somatotropin (bST) on milk production and profitability per cow. Linear regression was used to estimate the response to bST when other variables were held constant. Bovine somatotropin ...
Roseler D K - - 1997
Six prediction equations for dry matter intake (DMI) were evaluated for accuracy with independent data. The equations were selected based on ease of parameter measurement and practical on-farm use. The equations were assessed for accuracy of predicting individual weekly DMI for primiparous (n = 105) and multiparous (n = 136) ...
Ostersen S - - 1997
The lactational variation in milk protein composition and renneting properties and their relationship to the cow's body condition at calving were investigated in 39 Danish Holstein first lactation cows fed on a well balanced standard diet. All milk characteristics measured were significantly affected by stage of lactation (P < 0.01). ...
Huhtanen P - - 1997
A procedure allowing digesta sampling from the omasum via a ruminal cannula without repeated entry into the omasum was developed. The sampling system consisted of a device inserted into the omasum via the ruminal cannula, a tube connecting the device to the ruminal cannula, and a single compressor/vacuum pump. Eight ...
Fukuda M - - 1997
In this study bilateral ovarian follicular growth during the luteal phase was investigated in relation to the ovary where ovulation occurred. The diameter of the largest follicle in the contralateral ovary without corpus luteum and in the ipsilateral ovary with corpus luteum was measured using vaginosonography in a total of ...
Uetake K - - 1997
Behavioral pattern was investigated in dairy cows milked in an automatic milking system (AMS) in contrast to cows milked in a conventional milking parlor. Forty-eight Holstein cows were allocated to two groups of 24 animals. The two groups were housed in adjacent free stall pens. Both groups were milked twice ...
Sapru A - - 1997
Cheddar cheese was made from milk collected from two groups of cows milked either two or three times daily during early, mid, and late lactation. Milk from cows in late lactation had lower casein as a percentage of true protein and a higher acid degree value than did milk from ...
Majamaa H - - 1997
BACKGROUND: The gastrointestinal microflora is an important constituent of the gut mucosal defense barrier. We have previously shown that a human intestinal floral strain, Lactobacillus GG (ATCC 53103), promotes local antigen-specific immune responses (particularly in the IgA class), prevents permeability defects, and confers controlled antigen absorption. OBJECTIVE: The aim of ...
Valde J P - - 1997
Differences in ketosis and clinical mastitis rates, mean somatic cell counts (SCC) and reproductive performance scores (fertility status index = FS-index) between herds housed in free stall (n = 533) and tie stall (n = 59) barns were measured in relation to management and environmental factors in a retrospective cohort ...
Nagasawa H - - 1997
The effects of combined treatment with Guan-mu-tong (Gmt: Caulis aristolochiae manshuriensis) and other major components of Shi-Liu-Wei-Liu-Qi-Yin (SLWLQY), a Chinese herbal medicine prescribed for breast diseases, on normal and preneoplastic mammary gland growth were investigated. SHN virgin mice were divided into 6 groups at 3 months of age and treated ...
Gu J - - 1996
With the changes in dietary pattern in China, in recent years, hyperlipidaemia has become an important problem in the pathogenesis of chronic degenerative diseases, especially the cardio-cerebro-vascular diseases. From studies on laboratory animals and people with hyperlipidaemia, a number of hypolipidaemic foods and beverages have been identified, of relevance to ...
Grings E E - - 1996
A study was conducted to evaluate the effect of sire growth potential, steer age, and cow size on intake, growth, and production efficiency in grazing cattle. Data were collected on 24 cow-calf pairs during each of four summers (1989 to 1992) and on 12, 7-mo-old and 12 yearling steers during ...
Kress D D - - 1996
The objective of this study was to estimate genetic components for milk production of Hereford (HH), Tarentaise (TT), and Hereford x Tarentaise or Tarentaise x Hereford (HT) cows under range conditions at the Northern Agricultural Research Center, Havre, MT. Milk production of 494 cow-calf pairs was estimated by the weigh-suckle-weigh ...
Morita S - - 1996
Twenty-three cows were kept in a free-stall barn with an automatic system for milking and feeding. The cows were offered mixed silage for ad libitum consumption. Concentrates were fed with the automatic milking system. This experiment examined the eating behavior of cows and the relationship between the intake of concentrate ...
Bell I R - - 1996
This study examined plasma beta-endorphin as a marker of the physiological stress response in community elderly who were either high (n = 15) or low (n = 15) in self-rated frequency of illness from environmental chemical odors. Individuals who report nonatopic multiple sensitivities to or intolerances for low levels of ...
Lee B K - - 1996
A selection project produced control cows from continuous matings with breed average bulls for predicted transmitting ability for milk (PTA-milk) in 1964 and select cows from matings to four of the highest PTA-milk bulls each year since 1964. Blood samples were collected in 1992 when milk yield difference of select ...
Steen A - - 1996
The purpose of this study was to evaluate the use of additional acetone and urea analyses to the established herd recording system (protein, fat, lactose, and somatic cell count) in cow milk samples every second month. Samples were obtained from 43/82 herds (800/1368 cows) in a lowland/highland area. Acetone concentration ...
Khorasani G R - - 1996
Eight Holstein cows in early lactation and fitted with ruminal and duodenal cannulas were used in a 4 x 4 Latin square design experiment to determine the influence of forage source on microbial digestion in the rumen and nutrient supply to the intestine and to determine relationships between DMI, ruminal ...
Engelke E - - 1996
Data for milking parameters were obtained from three different milking clusters using a modified Latin square design to take into account the real milking time regimen of the farm and the time requirements to sort cows. In this modification, cows entered the milking parlor in a random sequence rather than ...
Young C W - - 1996
The estimate of inbreeding for registered Holstein females born during 1990 was 5.1 +/- 0.4% for a random sample of 600 two-line pedigrees. Previously published estimates were 4.7% for 1970, 3.8% for 1976, and 4.3% for 1982 from similar samples of pedigrees. These estimates were calculated using a base of ...
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