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Results 401 - 450 of 592
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Morris T R - - 1995
1. Pullets of 2 high-producing commercial stocks (both brown-egg layers) were exposed to 5 different lighting patterns between 18 and 72 weeks to test the hypothesis that photoperiods used in commercial lighting programmes early in the laying year may be unnecessarily long and, by accelerating the development of photorefractoriness, may ...
Norgaard A - - 1995
Levels of specific serum IgE to cow's milk, whole hen's egg, egg white, and egg yolk were compared to the outcome of double-blind, placebo-controlled food challenge (DBPCFC) with fresh egg and/or milk in 21 adults with a case history of immediate hypersensitivity to egg and/or milk. Specific serum IgE was ...
Samberg Y - - 1995
Veterinary control and routine sanitary procedures in commercial poultry hatcheries should include the following: choice of a suitable geographical location to ensure an isolated site; proper hatchery design with separation of major operations; one-way flow of work within the hatchery; adequate ventilation of each room; routine cleaning and disinfection; formaldehyde ...
Kaneko H - - 1995
OBJECTIVES: To investigate changes in postprandial electrogastrography (EGG) from the neurohormonal mechanisms. METHODS: We measured EGG indices [frequency amplitude of normal 3-cpm (EGG-3 cpm)], high frequency amplitude of heart rate variability which has reflected cardiac parasympathetic tone, and several serum immunoreactive (ir)-hormone levels in 12 fasted male volunteers (mean age ...
Carey J B - - 1995
Two commercial layer strains (3,456 hens total) were used to examine the effects of bird population on productive performance. Four cage population sizes (6, 8, 12, and 24 birds per cage) were compared. All cages were 35.7 cm deep and varied in width (61.2, 81.6, 122.4, and 244.8 cm). Floor ...
Carey J B - - 1995
Two commercial egg-type strains were beak-trimmed at 10, 10 and 63, or 10 and 84 d. There were no interactions between strain and beak trimming treatment. Pullet feed consumption was significantly reduced within the 14-d period following beak trimming at 63 or 84 d. Total pullet feed consumption (1 to ...
Cox J M - - 1995
The world-wide clinical incidence of Salmonella Enteritidis has increased markedly. The increase is associated with the enhanced ability of the bacterium to systemically colonise layer chickens. Subsequent contamination and consumption of intact shell eggs from colonised layer hens, either directly or in foods containing raw or lightly cooked eggs, causes ...
Braun P - - 1995
Migration of Salmonella enteritidis from the albumen into the egg yolk was investigated in 860 eggs. After artificial contamination of the albumen with different doses of S. enteritidis phage-type 4 the migration and the effect of temperature on the migration process during a storage period of up to 4 weeks ...
Kruszewicz A G - - 1995
Differences in the diameter of Isospora lacazei oocysts were found to be dependent on diet and other factors. House sparrows which were given animal products as food (hard boiled eggs) excreted with their faeces coccidia oocysts, which were larger than when they were fed grain. The results indicate a need ...
Pourreza J - - 1994
1. From 36 to 43 weeks of age 210 White Leghorn laying hens were used to study the relationship of plasma calcium and phosphorus concentrations to egg-shell quality when saline drinking water was given. 2. Seven experimental treatments in which different amounts of sodium chloride were supplied by the food ...
Cudjoe K S - - 1994
Contaminated eggs or foods containing eggs have been a source of food borne salmonellosis, with a significant proportion of these outbreaks being attributed to Salmonella enteritidis. Since the level of contamination in individual eggs or a pool of such eggs may be low, enrichment to increase cell numbers can take ...
Lehotay S J - - 1994
For regulatory purposes, there is a need for rapid, uncomplicated, and inexpensive methods to monitor pesticide residues in food. Commercial immunoassay kits from 3 manufacturers were evaluated for the detection of alachlor in cow milk and urine, and one kit was chosen for assay of chicken eggs and livers. Milk ...
Gliwicz, Z. Maciej
Cyclopoid copepods had unexpected effects on four species of Daphnia in an enclosure study. Small copepodites entered the brood pouch of large Daphnia and preyed on eggs. The resulting low clutch sizes could erroneously be ascribed to food limitation, but a clear difference between copepodite and food-limited populations could be ...
Irwin D J - - 1993
A community outbreak of Salmonella enteritidis phage type (PT) 4 infection, associated with eating food from a sandwich bar in Colchester, occurred in July 1991. One hundred and forty-four people were reported with food poisoning, of whom 132 met the clinical case definition. Three cohort studies of 92 people showed ...
McNeal T P - - 1993
Recently, the combination of sodium or potassium benzoate with ascorbic acid was shown to produce low levels (ng/g) of benzene in fruit-flavored soft drinks. The presence of benzene also was reported in butter, eggs, meat, and certain fruits; levels of these findings ranged from 0.5 ng/g in butter to 500-1900 ...
Chadee D D - - 1993
Ovitraps containing various concentrations of hay infusion and tap water were exposed weekly in the field for 15 wk to determine the oviposition patterns of Aedes aegypti. The results showed 10, 20, 60 and 80% hay infusions each attracted similar numbers of Ae. aegypti eggs oviposited and egg occurrences. No ...
Hill W L - - 1993
The developmental maturity of hatchling birds varies greatly across the altricial-precocial continuum and these differences are related to the relative proportions of yolk and albumen in a species' egg. In general, the more precocial the chick the greater the proportion of yolk in its egg. Egg composition can also vary ...
Dougherty M J - - 1993
Extracts of rabbit food, hay and rabbit faeces elicited a positive oviposition response from gravid female Lutzomyia longipalpis sandflies (Diptera: Phlebotominae). Combined extract of rabbit food and oviposition pheromone had a synergistic effect on sandfly egg-laying, greatly increasing the number of eggs laid and resulting in a highly targeted response. ...
Nir I - - 1993
1. Body weight, the weight of digestive organs and activities of some digestive enzymes were determined from hatching to 14 d of age in meat- and egg-type chickens. 2. Relative daily food intake and growth rate were much higher in meat- than in egg-type chickens. Relative daily food intake peaked ...
Srivastava T - - 1993
Oviposition site preference which is an important aspect of nonsexual behaviour of adult females was studied in four species of Drosophila, viz. D. ananassae, D. bipectinata, D. malerkotliana and D. biarmipes. The number of eggs laid by females in food vials was counted for 20 days. In each species, eggs ...
Barger I A - - 1993
Effects of a controlled-release albendazole capsule (CRC) on nematode parasitism and production of Merino ewes and lambs were investigated in a replicated grazing experiment between August 1986 and July 1989. The experiment was conducted on a site where the naturally occurring parasites were benzimidazole-resistant, with double the recommended dose of ...
Lampert, Winfried
I propose a mechanism of rapid phenotypic response of size at first reproduction (SFR) that may allow relatively large species of Daphnia to survive under variable fish predation. A single clone of D. magna isolated from a shallow lake with planktivorous fish is able to express the full range of ...
Picollo M I - - 1993
Topical application of different sulfhydryl (SH) reagents in acetone solution resulted in a deterrence of the feeding activity of Triatoma infestans nymph V. The ED50 for topical application of N-ethylmaleimide (NEM), the more active compound assayed, was 8.9 micrograms/insect. This effect showed a dose-dependent reversibility. We also observed feeding deterrency ...
Barnes G H - - 1992
Epidemiological investigation into an outbreak of food poisoning in 17 patients caused by Salmonella enteritidis phage-type 4 demonstrated a highly significant association with consumption of custard, retailed in custard slices and trifles from a bakery on one day. The bakery had changed their recipe for custard 2 weeks earlier to ...
Warnick L D - - 1992
Fecal egg counts often are used for diagnosing equine strongyle infections and estimating the number of eggs shed in the feces. An individual egg count should be interpreted in view of the normal fluctuation of egg numbers in an individual horse. In this study, the daily variability of strongyle fecal ...
Schmidt G H - - 1992
Newly hatched F1 nymphs of Aiolopus thalassinus (Fabr.) were fed on food treated with various concentrations of HgCl2, CdCl2, and PbCl2 until the end of adult life. Toxicological observations were followed in the F1 generation and in the F2 generation derived from the heavy metal-loaded F1 parents. The highest concentration ...
Fritz G N - - 1992
Anopheles punctipennis (Say), collected in October from resting sites in Illinois, deposited two morphologically distinct types of egg batches. One type was similar to the seasonal "winter" egg of Anopheles walkeri Theobald, with an extensive exochorion that covered all except the tip of the egg. Laboratory rearing of isofemale lines, ...
Triyuwanta - - 1992
1. An experiment was conducted with 144 caged hens to study the effects of different dietary concentrations of phosphorus and of food restriction on the reproductive performance of dwarf breeder hens and on the growth and the bone development of their progeny. 2. Severe food restrictions at 105 g/hen day ...
Krepel H P - - 1992
In northern Togo and northeastern Ghana, Oesophagostomum bifurcum is a common parasite in humans. Diagnosis is based on coproculture because the eggs of hookworm and Oesophagostomum are indistinguishable. To determine the level of egg production, 12 subjects were treated with 2 x 10 mg/kg of pyrantel pamoate and the worms ...
Blokhuis H J - - 1992
1. Additional straw or grain was supplied to hens during rearing in floor pens with litter floors. During lay, hens were housed in pens with partly-littered partly-slatted floors. The effects on foraging behaviour and feather pecking were studied and feather damage was scored at 17, 30 and 42 weeks of ...
Orton C J - - 1992
The activities of three avermectins and deltamethrin as oviposition suppressants were investigated with a laboratory bioassay in which gravid females of the blowfly Lucilia cuprina (Wiedemann) were exposed to treated oviposition targets. An easily comparable index of suppression, the oviposition suppression concentration (OSC), was defined. All four compounds were effective ...
Spitters C - - 1992
In previous articles in the Maryland Medical Journal we have reviewed the problem of Salmonella enteritidis associated with shell eggs. Cases and outbreaks continue to occur. Health care professionals need to be aware of the association between the consumption of raw or undercooked eggs or egg-containing foods and gastroenteritis, especially ...
Guisande, Cástor
The effect of three different Scenedesmus food concentrations (0.04, 0.2 and 1 mg C l-1) on maternal investment was studied in two cladoceran species of similar size, Daphnia pulicaria and D. hyalina. It was observed that as food concentration decreased (between 1 and 0.2 mg C l-1), there was an ...
Mirza M A - - 1992
An experiment was conducted with Starcross layers to evaluate the replacement value of sunflower meal (SFM) for cotton seed meal (CSM) and sesame meal (SM). The birds (aged 24 weeks) were given 4 isonitrogenous and isocaloric rations containing 0, 5, 10 and 15% dehulled sunflower meal. The substitution of SFM ...
Ormerod S J - - 1992
Unhatched eggs were collected in 1988 and 1990 from nests of the Eurasian Dipper Cinclus cinclus and the Grey Wagtail Motacilla cinerea in Wales, eastern Scotland and south-western Ireland. Mercury concentrations in Dipper eggs (geometric means 0.45-0.91 ppm (microg g(-1)) dry mass) were significantly lower in eastern Scotland than in ...
Engel H N - - 1991
Intramagnal insemination is a useful technique in the analysis of spermatozoal function. Precise deposition of spermatozoa requires the use of laparotomy. However, hen-day egg production can be adversely affected by such a procedure. The present work demonstrates that postoperative hen-day egg production is affected by choice of anesthetic. Hens anesthetized ...
Luiting P - - 1991
A large fraction (on average, 25%) of the variance of daily feed consumption among individual laying hens appears unaccounted for by a model with metabolic body weight, daily egg mass production, and body weight gain as independent variables. This unexplained term is referred to as "residual feed consumption" (RFC), defined ...
Ritchie S A - - 1991
The association of Aedes taeniorhynchus eggs and several variables was studied in a Florida mangrove forest. Eggs were limited to stands of red mangrove (Rhizophora mangle L.) that were embedded within a black mangrove (Avicennia germinans L.) forest. The occurrence of eggs was related significantly to elevation and the amount ...
Nonaka N - - 1991
The prevalence of parasitic infections in backyard flocks was surveyed using litter samples from 74 pens located on 12 farms in central lower Michigan. Eight species of birds were represented. Two methods of litter examination (a sucrose flotation technique and a multiple washing/ZnCl2 flotation) were compared; the sucrose flotation technique ...
Teyke T - - 1991
Egg laying behavior is known to suppress feeding in Aplysia, but both behaviors have common responses involving head movements and posture. Egg laying hormone (ELH) applied in vitro to the isolated nervous system of Aplysia reduces the spontaneous and the evoked activity of the C-PR, a neuron implicated in postural ...
Ching-Lee M R - - 1991
One hundred and six dozen eggs, representing 12 brands, were purchased from Oahu supermarkets and cultured for Salmonella using standard FDA (Food and Drug Administration) microbiological techniques. Two enrichment incubation temperatures were used to improve culture sensitivity. Ten cartons (9.4 percent) of the 106 dozen samples had shells positive for ...
Yoshida A - - 1991
An indirect competitive enzyme immunoassay for hen egg white lysozyme (HEL) used as a food additive was investigated. Anti-HEL antibodies were obtained from B10A mouse ascites immunized by intraperitoneal injection of HEL. HEL samples to be assayed were extracted from foods with 1% gelatin in borate buffer. Goat anti-mouse IgG ...
Sciscioli M - - 1991
Stelletta grubii is an oviparous demosponge, which, during its reproductive period from summer to autumn, has small eggs (80-90 microns) dispersed uniformly in the mesohyl. The nucleolated nucleus is surrounded by dictyosomes containing small vesicles, which contribute to form reserve material. Vesicles, numerous food vacuoles, and groups of mitochondria are ...
Nordskog A W - - 1991
1. The purpose of the experiment was to evaluate the use of food consumption records in selection to improve layer-type chickens. 2. Twelve subpopulations of Leghorns, including 5878 tested birds, were used in a selection experiment which lasted 5 generations. Four were selected using an index (I1) that combined information ...
Duguid J P - - 1991
Evidence on the extent of the part played by infected hens' eggs in causing salmonella food-poisoning is inconclusive. The role of freshly cooked shell eggs is currently much exaggerated. Prevention should be sought through improved catering practices and kitchen hygiene, and attempts to eradicate salmonellas from laying flocks are likely ...
Wilson H R - - 1991
In Experiment 1, four pens of 90 Ross dwarf broiler breeder hens and 9 cocks each were assigned to feeding times of 0830, 1130, and 1430 h. Eggs were collected hourly from 0800 to 1600 h, 5 days/wk for 4 wk. In Experiment 2, five pens of 30 Arbor Acres ...
Ando S - - 1991
1. The distribution of carotenoids in unfertilized ovulated eggs from chum salmon, kokanee (natural and cultured), masu salmon and cultured rainbow trout was examined from the comparative biochemical point of view. 2. The carotenoid contents in the eggs from cultured salmons such as kokanee and rainbow trout were low, whereas ...
van Delden W - - 1990
Several behavioral traits connected with oviposition were studied in Drosophila melanogaster strains which ahd been kept on regular and ethanol-supplemented food. All strains preferred food with a low agar content for oviposition, though this tendency was more pronounced in an ethanol-adapted strain. Oviposition on regular and ethanol-supplemented food was tested ...
Menghi G - - 1990
In this study we investigated immunohistochemically the distribution of VIP in ampullary and isthmic segments of the rabbit oviduct at different hormonal stages in order to correlate the presence of VIP with the morphological and functional differences between the two oviduct segments. Noticeable changes in the VIP-positive sites emerged between ...
Ishii F - - 1990
The physicochemical properties of soy bean oil emulsions stabilized with purified egg lecithins (phosphatides) of various concentrations have been examined. The zeta potential of the emulsion droplets and the mean particle size of oil droplets in 10% (w/w) o/w-type emulsion decreased with increasing emulsifier concentration and then levelled off at ...
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