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Results 451 - 500 of 589
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Campanella C - - 1990
In Discoglossus pictus oocytes, the germinative area (GA) contains long and irregular microvilli where actin microfilaments are located. In the egg, the funnel-shaped dimple that originates by invagination of the GA is present. In the dimple both microvilli and microfilament bundles have a very orderly appearance. This report extends previous ...
Olver M D - - 1989
1. Two hundred and forty Amber-link pullets were individually caged in a naturally-ventilated laying house and fed one of four isoenergetic, isonitrogenous diets containing 0, 20, 40 or 80 sodium bentonite/kg for 44 weeks. 2. No significant dietary effects were observed between treatments with regard to body weight at 20 ...
Jackson K A - - 1989
Breast-milk lipids contain long-chain polyunsaturated fatty acids (PUFA) not found in infant formulas. Because the erythrocyte membranes of formula-fed infants are depleted in long-chain PUFA, we sought food sources of these 20- and 22-carbon polyunsaturates suitable for use as dietary supplements. A variety of commercially available infant foods containing meats ...
Dietrich H M - - 1989
A management programme is described for a small colony of Obese strain (OS) chickens afflicted with spontaneous hereditary thyroiditis. Animals of this White Leghorn line are used as an animal model for Hashimoto's thyroiditis of man to study possible mechanisms of autoimmunity in general and organ-specific autoimmune diseases in particular. ...
Kubiak T J - - 1989
For the 1983 nesting season, Forster's tern (Sterna forsteri) reproductive success was significantly impaired on organochlorine contaminated Green Bay, Lake Michigan compared to a relatively uncontaminated inland location at Lake Poygan, Wisconsin. Compared with tern eggs from Lake Poygan, eggs from Green Bay had significantly higher median concentrations of 2,3,7,8-tetrachlorodibenzo-p-dioxin ...
Braastad B O - - 1989
1. The effects on behaviour of selecting light-hybrid laying hens for high and low efficiency of food utilisation were investigated. Efficiency of food utilisation was measured as the proportional deviation of observed food consumption from expected food consumption. 2. Videograms of the day-time behaviour of 48 to 53-week-old individually caged ...
Munkittrick K R - - 1989
Sucker eggs were collected from a metal-contaminated site where previous collections had documented a maternal yolk factor associated with an increased larval copper tolerance during yolk nutrition. In this study, white sucker eggs were divided into groups which were water hardened and/or incubated at the contaminated site or a reference ...
Rogers B J - - 1989
Fertilization experiments using zona-free hamster eggs and spermatozoa from both guinea pig and human were conducted in the presence of cytochalasin D to evaluate the possible role of actin filaments in fertilization processes. When the actin filament inhibitor, cytochalasin D, was added to fertilization media at concentrations of 10 to ...
Balnave D - - 1989
1. Supplementing the drinking water of laying hens with 600 or 2000 mg sodium chloride/l induced large increases in egg-shell defects without corresponding changes in egg production, egg weight or food and water intakes. A supplement of 2000 mg NaCl/l resulted in a high incidence of shell-less eggs. 2. The ...
Weseloh D V - - 1989
To determine if contaminant levels in Common Terns had changed over the last decade, we collected and analyzed eggs from four nesting colonies on the three lower Great Lakes during 1981. DDE and PCBs were detected in every egg from the four colonies. Dieldrin, mirex and trans-nonachlor were detected in ...
van de Bovenkamp P - - 1988
A sensitive and specific method is described for quantifying various cholesterol oxidation products in foodstuffs, including 7 beta-hydroxycholesterol, cholesterol-alpha-epoxide, cholestane-triol, 7-ketocholesterol and 25-hydroxycholesterol. A chloroform-methanol extract of the food was fractionated over two successive silica columns. Two fractions containing different classes of oxysterols were then analyzed as trimethylsilyl derivatives by ...
Whichelow M J - - 1988
Over 7000 participants in the Health and Lifestyle Survey were asked whether they thought each of ten common foods contained fibre. Five of these foods were fibre-free and five contained fibre. The overall proportions of respondents giving correct answers for each food were (as percentages): Weetabix 93.4, digestive biscuits 80.0, ...
Melakeberhan H - - 1988
Food (energy) consumption rates ofMeloidogyne incognita were calculated on Vitis vinifera cv. French Colombard (highly susceptible) and cv. Thompson Seedless (moderately resistant). One-month-old grape seedlings in styrofoam cups were inoculated with 2,000 or 8,000 M. incognita second-stage juveniles (J2) and maintained at 17.5 degree days (DD - base 10 C)/day ...
Hatakeyama S - - 1988
The effects of Cu on the reproduction of Polypedilum nubifer (Chironomid) through water and food were examined in a flowthrough aquarium by Cu exposure from the egg stage. The emergence success decreased to 74, 38, 16, and 2% of the control at 10, 20, 30, and 40 micrograms Cu/liter, respectively. ...
Dussourd D E - - 1988
The eggs of Utetheisa ornatrix contain pyrrolizidine alkaloids. These compounds are contributed by both parents, who sequester them as larvae from their food plants. Females receive alkaloid from the males at mating, apparently by seminal infusion, and transmit this alkaloid together with alkaloid of their own to the eggs. Field ...
Midgley M - - 1988
1. Two experiments are described in which a system of intermittent lighting (15 min light followed by 45 min dark for 15 h, then 15 min light, 30 min dark, 15 min light and 8 h dark) was applied to laying pullets from 37 to 72 weeks of age. A ...
Cunningham D L - - 1988
The Cornell (8L:10D:2L:4D) and (Ralston Purina) Biomittent lighting programmes were applied to a commercial strain of White Leghorn laying hens from 20 to 64 weeks of age. 2. The egg production of hens exposed to the Cornell lighting was reduced compared to the Bio-mittent programme. 3. Food consumption was less ...
St Louis M E - - 1988
From 1976 to 1986, reported Salmonella enteritidis infections increased more than sixfold in the northeastern United States. From January 1985 to May 1987, sixty-five foodborne outbreaks of S enteritidis were reported in the Northeast that were associated with 2119 cases and 11 deaths. Twenty-seven (77%) of the 35 outbreaks with ...
Göckler L - - 1988
Production of enterotoxin A (SEA), enterotoxin C (SEC), and thermonuclease (TNase) by Staphylococcus aureus was determined during growth in cooked egg-noodles at different temperatures (15-37 degrees C). Both SEA and SEC and TNase were detected when greater than or equal to 4.0 x 10(7) colony forming units (cfu)/g were present. ...
Imai C - - 1988
Egg yolk, aseptically prepared from fresh eggs, was partially dehydrated with a 40% high fructose corn syrup solution, and 10% salt was added. This salted yolk paste was added to mannitol salt agar for the detection of Staphylococcus aureus, to NaCl-glycine Kim and Goepfert medium for detection of Bacillus cereus, ...
Kosanke G J - - 1988
1. The pulmonate freshwater snails Physa and Lymnaea and the earthworms Eisenia and Lumbricus can take up and concentrate a carbamate herbicide (chlorpropham). 2. The mobility of freshwater snails was diminished in the presence of the herbicides chlorpropham (carbamate), cycloate (thiocarbamate), pentanochlor (amide) and chloroxurone (urea derivate). 3. The egg-assemblies ...
Glatz P C - - 1987
1. Heart rate (measured on restrained hens in two experiments) was used as an indicator of short term fear and pain responses of light and heavy strains of hens subjected to beak trimming. 2. In the first experiment 3 mm of the upper and lower mandibles was trimmed, while in ...
Savory C J - - 1987
1. Normal adult laying hens, which produced 41 g egg/hen d, ate 30 g/hen d more of a pelleted diet than did hens of the same age which were induced to lay eggs internally by surgical treatment of their oviducts. This implied that 0.336 MJ metabolised energy was required to ...
Foote R H - - 1987
The purpose of this study was to examine survival and fertility of frozen bull sperm processed in several extenders containing a detergent mixture, sodium, and triethanolamine lauryl sulfate. Addition of .5% (vol/vol) detergent to whole milk was completely spermicidal. When 10% egg yolk (vol/vol) was included in the glycerol or ...
Rude R A - - 1987
Ethyl acetate and diethyl ether were compared for their ability to recover Ascaris spp. and Trichuris spp. eggs from seeded milorganite, liquid sludge, and cabbage. Concentrations of 10, 100, and 1000 eggs/10 g test sample were prepared for 20 replicates of each product. The use of diethyl ether yielded fewer ...
Vuorinen M - - 1987
Brown trout (Salmo trutta L.) eggs fertilized in clean water were incubated in bleached kraft mill effluent (BKME) concentrations of 0, 0.5, 1, and 2% (v/v) in a continuous-flow system and exposure was continued with the sac fry for most of the yolk sac stage. In addition, sac fry first ...
Carey J B - - 1987
Effects of cage-stocking density during the rearing period on three commercial strains housed in open and closed rearing and laying houses were examined in two experiments. Stocking densities in Experiment 1 were 311, 259, and 239 cm2 per bird and in Experiment 2 were 311, 259, and 222 cm2 per ...
Salih N E - - 1987
Extracts of proventriculus (PE) and small intestine (IE) of fowl were used, for the first time, as media for the in vitro hatching of infective eggs of Ascaridia galli. Hatching was successful in a mixture of equal parts of PE and IE (MIP) under normal air and under different concentrations ...
Damme K - - 1987
Environmental factors affecting fasting metabolic rate (FMR) were quantified and a short-time recording system was developed. Discontinuous measurements of gas exchange of 1,120 medium weight brown egg layers were taken after 24 and 36 hr of starvation. Body weight (BW) and shank length (SL) were measured and feather cover and ...
Széll A - - 1987
The relative volume of Day-3 mouse embryos changed as a linear function of the reciprocal of osmolality [corrected] of non-permeating solutes after 10 min exposure to sucrose and glycerol-sucrose solutions at 20 degrees C. The slope of the linear regression line was less in glycerol-sucrose than in sucrose solutions because ...
Maci R - - 1987
The teratogenicity of a commercial formulation of the fungicide maneb (Maneb 80, containing 80% manganese ethylenebisdithiocarbamate and 20% inert ingredients) in chick embryos was evaluated. Unincubated eggs (157-207 per treatment group) were immersed in 0.5, 1.5, 4.5, or 13.5 g/liter maneb aqueous solutions for 30 sec. Two control groups were ...
de Azambuja P - - 1987
Oogenesis and oviposition can be inhibited in female of Rhodnius prolixus by means of short-term experiment (first reproductive cycle) of a single dose of ethoxyprecocene II given by ingestion. The inhibition is dose-dependent as measured by oocyte growth, egg maturation and egg deposition. In a long-term experiment (second and third ...
Davami A - - 1987
Effects were studied of population size, floor area, and feeder space per hen on variables associated with egg production and corticosterone level. A total of 408 White Leghorn-type laying hens was used in this study. Three treatments were observed: 5 hens per cage with 8.6 cm feeder space per hen, ...
Pitman N K - - 1987
A pyrethrin-piperonyl-butoxide shampoo was compared with a similarly formulated lotion for their pediculicidal and ovicidal effects against head lice. Forty children with active Pediculus humanus capitis infestation were randomly assigned to one of two groups for a single treatment with either the shampoo or the lotion. An average of ten ...
Tullett S G - - 1987
Eggs weighing 62.5 +/- 0.5 gm when fresh were incubated in air in a forced-draft incubator for 13 days during which time their shell conductance to water vapor (GH2O) was determined. Eggs whose shells represented the entire range of GH2O values present in the population were then incubated for a ...
Turner E - - 1986
Sea urchin eggs contain a small molecular weight heat-stable factor that confers cyanide-resistant NAD(P)H-O2 oxidoreductase activity on ovoperoxidase (Turner, E., Somers, C. E., and Shapiro, B. M. (1985) J. Biol. Chem. 260, 13163-13171), the enzyme responsible for cross-linking the extracellular protein coat (fertilization membrane) of the egg. Here we report ...
Denbow D M - - 1986
The effect of intracerebroventricular (ICV) injections of turkey prolactin on food intake of turkey hens was studied. Adult, nonlaying medium-weight turkey hens, exposed to 6 hr of light per day, were used in Experiment 1. In Experiments 2 and 3, medium-weight and large-weight turkey hens, respectively, exposed to a long ...
Candelas G C - - 1986
The cylindrical or tubiliform glands of the spider Nephila clavipes have been studied and compared to the large ampullates on which we have previously reported. The three pairs of cylindrical or tubiliform glands secrete the fibroin for the organism's egg case. Their solubilized luminar contents migrate as a homogeneous band ...
Burton F G - - 1986
Water vapour conductance (GH2O) was determined for 25 grey heron Ardea cinerea eggs in the laboratory, and in nests during natural incubation at two Scottish colonies. The mean GH2O of eggs measured in the nest which successfully hatched was 9.0 mgH2O/mmHg/day and the mean water vapour pressure gradient between egg ...
Benitez-Rodriguez R - - 1986
Bovicola limbata Gervais, 1844 has been cultured in vitro at 35 +/- 1.5 degrees and 75 +/- 5% R.H. using scrapings from goatskin and host hair as food. In these conditions its complete life cycle has been obtained. New data are given on the biology of this species: maximum, minimum ...
Oettlé E E - - 1986
As a pilot trial, a semen sample was diluted with a glucose-citrate-egg yolk diluent and frozen in 0.5 ml PVC paillettes in liquid nitrogen vapor. Motility and acrosome integrity of the sample were evaluated before and after freezing, and longevity was monitored up to 6 h postthaw. Acrosome integrity was ...
Uhnák J - - 1986
Epidemiological studies of food contamination in an area of intensive agriculture for the years 1975-1983 showed that hexachlorobenzene (HCB) was present in all food-chain links, although HCB has not been used in Czechoslovakian agriculture since 1980. Samples of potatoes, wheat, milk fat, eggs, meat and human milk were analysed by ...
Okazawa T - - 1985
Tripteroides aranoides was colonized in the laboratory. Total duration of the immature stages was ca. 3 weeks at 28 degrees C, L:D = 15.5:8.5 with an ample food supply. Retardation of 4th instar development was observed in larvae fed on insufficient food. Females were autogenous for the first clutch of ...
Piccirillo V J - - 1985
The Bobwhite quail (Colinus virginianus) is the avian model of choice for testing the reproductive impairment potential of pesticides and environmental contaminants. While the literature contains numerous reports on the effects of pesticides on eggshell development for quail, mallards and other avian species (Haegele and Tucker, 1974; Kolaja, 1977; Jenkins ...
Jones R B - - 1985
The responses of laying hens in several fear-eliciting situations were examined. The effects of group-housing and translocation of birds between tiers upon a previously-observed relationship between fearfulness and cage level were assessed. Birds housed in the top tier showed longer durations of tonic immobility, greater avoidance of a novel rod ...
Dogterom G E - - 1985
A study has been made in field specimens of Lymnaea stagnalis of the relationship between environmental factors (temperature, photoperiod, and food) and spontaneous ovipository activity as well as oviposition evoked by injection of the ovulation hormone (CDCH) during a 1-year cycle. It appeared that spontaneous egg laying started in mid-May ...
Susswein A J - - 1984
Effects of food deprivation upon time devoted to different behaviors in Aplysia fasciata were investigated. Time invested in mating, egg-laying, swimming, and movement in place was increased, and time spent immobile and crawling was decreased. Time of occurrence of behaviors was highly synchronized, but differed from that seen when food ...
Miller R W - - 1984
BAY Vi7533 (2-chloro-N-[[[4-(trifluoromethoxy)phenyl] amino] carbonyl] benzamide) was fed to White Leghorn and Vedette Mini-broiler breeder hens at concentrations ranging from 0 to 25 ppm in the ration. Concentrations of 15 and 25 ppm resulted in greater than 95% mortality of house flies, Musca domestica L., seeded as larvae into the ...
Stevenson J S - - 1984
Two experiments were conducted to determine the influence of various lactational treatments on the incidence of estrus and subsequent fertility of sows. Experiment 1 consisted of 60 crossbred (Yorkshire X Duroc) sows assigned to one of four treatment groups. Litter size was reduced (RLS) to two to four nursing pigs/sow ...
Meir M - - 1984
One of the most important factors determining hatchability of avian eggs is the proper water balance of the eggs during incubation. In turkey eggs, a total diffusive water loss (F) of 12 +/- 1% SD initial egg mass in 28 days, yielded maximal hatchability irrespective of the combination of eggshell ...
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