Search Results
Results 451 - 500 of 518
< 1 2 3 4 5 6 7 8 9 10 11 >
O'Leary H - - 1993
Interactions between tourists and Barbary macaques (Macaca sylvanus) at Queen's Gate, Gibraltar, are described. Interaction rates are high, with 99.6 interactions/h at peak times. Macaques spend 13.2% of their day interacting with tourists and 41.9% inactive. An overall ratio of 3.2:1 between human-initiated and macaque-initiated interactions was found. Of interactions ...
Knudsen I - - 1993
The aim of the present Danish regulatory toxicological efforts is to identify and eliminate human carcinogens introduced in the human food supply directly or indirectly through the activity of man. The efforts are directed towards food additives, contaminants and food itself, both individual food items and dietary habits. The overall ...
French R J - - 1993
Vanadium is a pervasive element of biological systems, being widely distributed across the food supply. Food refining and processing appear to increase vanadium content. At higher intakes, it accumulates in body tissues such as liver, kidney and bone. Essentiality of the nutrient has been established in lower life forms but ...
Coe J E - - 1992
Zeranol (alpha-zearalanol) is a beta-resorcylic acid lactone (RAL) that has estrogen activity. It is synthesized by molds and is difficult to avoid in human food products. We tested the ability of this mycoestrogen to damage the liver of the Armenian hamster, a rodent that is especially sensitive to hepatotoxic effects ...
Rummel J D - - 1992
When humans move out into the solar system to stay for long durations, the most immediate challenge will be the provision of a life-supporting environment in locations that are naturally devoid of food, air, and water. Life support systems must provide these commodities in all phases of space flight--during intravehicular ...
Saenz R - - 1992
"This study uses an integrated human capital framework to examine the relationship between human capital, employment and ethnic factors and return migration to the Southwest [United States] among Chicanos. The sample used in the study is derived from the 1980 Public Use Microdata Samples and contains 1,926 Chicano householders between ...
Pariza M W - - 1992
There are numerous anticarcinogens in the diet. An important question is how to use such substances in an effective, directed way to reduce cancer risk in humans. The "designer foods" concept is one approach for accomplishing this goal. Foods would be engineered to contain effective levels of anticarcinogens. This idea ...
Bhatnagar K P - - 1991
Specific gravity values for the pineal gland in any species are lacking. These data are necessary for calculating and interrelating pineal weight and volume. This report deals with the specific gravity of human pineal gland. The specific gravity of fresh, unfixed human pineal has been determined to be 1.197 +/- ...
Burleigh D E - - 1991
Isolated preparations of human colonic mucosa were set up in Ussing chambers. Noradrenaline reduced basal short-circuit current, morphine did not nor did loperamide except at the highest concentration tested. Electrically evoked increases in short-circuit current were unaffected by morphine but reduced by loperamide, by a naloxone-insensitive mechanism. Unidirectional fluxes of ...
Pieters M H - - 1991
OBJECTIVE: To study immaturity and aneuploidy in human oocytes after two different stimulation protocols. DESIGN: Retrospective. SETTING: Outpatient IVF clinic/laboratory. PATIENTS: One hundred forty-three patients of whom 65 were stimulated with clomiphene citrate (CC)/human menopausal gonadotropin (hMG) and 78 were stimulated with gonadotropin-releasing hormone agonist (GnRH-a)/hMG. Only patients with at ...
Micco C - - 1991
Ochratoxin A is a mycotoxin frequently found as a contaminant both in food and in animal feed. It can reach humans through the food chain and can then be excreted in biological fluids, one of which is human milk; it can therefore be transmitted from mother to child during breast-feeding. ...
Brömme D - - 1991
Human cystatins A, B and C were purified, and their inhibition efficiency was tested with the cysteine proteinase cathepsin S. Cathepsin S was strongly inhibited by cystatins A and B in the subnanomolar range and by cystatin C in the picomolar range. Two steps of inhibition of cathepsin S by ...
Arnold L E - - 1990
The twentieth-century increase in human height in affluent nations may not be entirely due only to such nurturant considerations as food supply and electric lights. A possible genetic role might be found in interactions of food supply, maternal pelvic size, and height-survival/vulnerability links, and in mate selection. Humans seem to ...
Kenawy M A - - 1990
Blood meals were tested by a direct enzyme-linked immunosorbent assay (ELISA) for 424 Anopheles sergentii and for 63 An. multicolor collected in Siwa, Farafra and Bahariya oases in the Western Desert of Egypt. Both species were highly zoophilic. Human blood-feeding by An. sergentii was less common in Bahariya (2.3%) and ...
Blaney S P - - 1990
This essay attempts to address the perennial question 'Why Paranasal Sinuses?'. In doing so it highlights the flaws in many much-favoured but ill-founded theories concerning the role of these sinuses in humans. It is concluded that the question can only be fully answered through a greater understanding of differential growth ...
Hejtmánek M - - 1990
Spore walls of Backusella lamprospora (Mucorales) were stained with ten fluorescent brighteners (FB) and the intensity of their fluorescence was determined. The fluorescence was most intense with Uvitex 2B (100%), other brighteners yielding lower fluorescence intensities: Blankophor BA 267% and BA 200% about 75%, Rylux BSU about 50%, other Rylux ...
Iyengar G V - - 1989
There has been considerable progress in understanding the role of chromium in human nutrition. However, the lack of data on the forms of chromium-absorption from foods by the gastro-intestinal tract, and our concomitant inability to obtain an accurate assessment of the daily mobile pool of metabolically active chromium in the ...
Di Benedetto G - - 1989
The effect of cryopreservation on ciliary activity of human nasal respiratory epithelium was evaluated. Samples were cryopreserved in a solution containing nutrient medium, 10% fetal calf serum, and two different concentrations (10 or 20%) of dimethyl sulfoxide and stored in liquid nitrogen at -196 degrees C for 2 weeks. Ciliary ...
Atack J R - - 1989
A number of carbamoyl- and N(1)-substituted analogs of physostigmine were synthesized and their in vitro potencies (IC50 values) vs. human erythrocyte and brain (cerebral cortex and caudate nucleus) acetylcholinesterase (AChE) and electric eel AChE and against human brain and plasma butyrylcholinesterase (BChE) were compared to the potencies of physostigmine and ...
Song B L - - 1989
Potent in vitro spermicidal activity of parabens against human spermatozoa was demonstrated in this study. The "pass" point concentration of the four parabens--methylparaben, ethylparaben, propylparaben, and butylparaben, at which all spermatozoa were immobilized and no immobilized spermatozoon revived after 30 min incubation in phosphate buffered glucose solution, was 6, 8, ...
McCarthy T J - - 1989
Hog cholera control efforts in Belize in 1975 included the slaughter of village pigs, a primary food source for the vampire bat (Desmodus rotundus). The bats then fed on secondary food sources, including humans. In 1 village, 22% of the families interviewed were exposed to attacks: 17 children and 2 ...
Kajitani H - - 1989
Utilizing in vitro colony assay, we investigated the effect of human recombinant interleukin 4 (hIL-4) on granulopoiesis of normal human bone marrow cells. Though hIL-4 itself did not possess any colony-stimulating activity, the number of neutrophil (N) colonies, particularly the number of small colonies, supported by human recombinant G-CSF (hG-CSF) ...
Vincentelli J - - 1989
Human spectrin, when isolated, purified and stored in such conditions that preserve its tetrameric form, is able to associate with human hemoglobin as it is clearly shown by gel filtration. However, this hemoglobin-spectrin association does not seem to have a significant effect on hemoglobin oxygenation as indicated by equilibrium and ...
Strolin Benedetti M M Farmitalia Carlo Erba, Research and Development, Milan, - - 1989
Salsolinol is present in human fluids and tissues as well as in some foods and beverages. It was found previously that the R enantiomer of salsolinol predominates in human urine whereas the S enantiomer predominates in Port wine. In this study a new methodology for measuring the proportion of the ...
de Silva P - - 1988
Food aversions in normal adult humans are quite common, but they rarely present a clinical problem. The present report describes the modification of food aversions in a series of adults. The strategy used was simple in vivo graded exposure, with modelling and verbal reinforcement. The success of the strategy suggests ...
Grice H C - - 1988
Butylated hydroxyanisole (BHA) induces tumours of the squamous epithelium of the forestomach of rodents, but not at other sites. Although humans do not have squamous epithelium in their stomach the likelihood that BHA will induce tumours of the squamous epithelium of the oesophagus needs to be considered. Studies in several ...
Geyer H - - 1986
A list of environmental chemicals detectable in adipose tissue and/or milk of non-occupationally exposed humans is presented. Besides their physiochemical properties (n-octanol/water partition coefficient and water solubility), their acceptable daily intake (ADI) values, production figures, fate in the environment, concentrations in human adipose tissue, and data from total diet studies ...
Thurmon J C - - 1986
Humane euthanasia is considered to be the rapid and painless inducement of death. It is necessary for unconsciousness to occur quickly and be followed immediately by cardiac and/or respiratory arrest. Although many methods of euthanasia have been used, not all fulfill the criteria of humane euthanasia. Methods of euthanasia used ...
Lejeune H H Chercheur Qualifié FNRS, Laboratory of Experimental Psychology, University of Liège, 5, boulevard du Rectorat, B 32, Sart-Tilman 4000 LIEGE, - - 1986
Newly hatched quails and adult controls of the species Coturnix coturnix japonica were trained to emit a treadle-pressing response reinforced with food on a Fixed Interval 60 seconds schedule, at a pace of 4 or 5 sessions a day. The young subjects were successfully shaped at the fourth day of ...
Yakimoff N - - 1986
One hundred subjects ranked the apparent tilt of ten quadrangles. A scale of perceived orientation was derived from a pair-comparison treatment of these data. The main characteristic determining estimated orientation of the quadrangles was the axis from which the sum of the squared distances to each point of the figure ...
Sens D A - - 1985
The presence of high concentrations of sodium in the sweat of patients with cystic fibrosis is widely accepted by all investigators as one of the most important manifestations of the genetic defect. However, the simple means of sweat collection utilized for diagnostic purposes has been extended to the biochemical and ...
Roberts A - - 1985
The microbial catabolism of tryptophan to indole has been studied in 15 human subjects by analysis of the daily urinary excretion of indican (potassium indoxylsulphate) before, during and after chronic saccharin ingestion. The daily excretion of indican during a 3-wk control period showed marked inter- and intra-subject variability. Analysis of ...
Barankiewicz J - - 1984
The catabolisms of deoxy-ATP and ATP were compared in cultured human T lymphoblastoid cells incubated under various conditions. It was found that in the presence of deoxycoformycin, an inhibitor of adenosine deaminase, deoxyadenosine was the only product of deoxy-ATP catabolism. In contrast, the main products of ATP catabolism in either ...
Kohli R K - - 1984
Hydroxocobalamin is present in fairly large proportions both in foods and in the human body and apparently plays an important biological role. Since cyanocobalamin seems to play hardly any significant biochemical role in healthy humans, several physicians prefer to administer hydroxocobalamin to vitamin B12 deficient patients. We find that hydroxocobalamin ...
Ramsden D B - - 1984
The mass spectral properties of four classes of derivatives of thyronine are discussed ( oxazolidinone , O-methyl oxazolidinone , O-acetyl oxazolidinone and N,O- diheptafluorobutyryl methyl ester). An assay for thyronine in human urine is described based on the N,O- diheptafluorobutyryl methyl ester. Results of T0 excretion in euthyroid humans were ...
Knipping G - - 1984
Human HDL was delipidated and the apolipoproteins were fractionated by chromatofocusing. Chromatofocusing, which separates proteins due to their differing isoelectric points, resulted in 8 peaks with corresponding pI values of 7.40, 6.92, 6.64, 5.48, 5.30, 5.18, 4.92 and 4.63. By one single chromatofocusing run four apolipoproteins were obtained in pure ...
Luke D A - - 1983
It has been argued that the prolonged retention of cusps in the human dentition is a relatively recent aberration due to the negligible abrasiveness of modern diets and that to achieve maximum efficiency and freedom from disease human teeth should be worn down as they are in many herbivorous mammals. ...
Holloway W D - - 1983
The digestibility of pectin, a component of dietary fiber was investigated in humans. The groups studied comprised healthy people with intact gastrointestinal tracts, and patients who had undergone total colectomy followed by ileostomy in the management of ulcerative colitis. The pectin content of the individual plant foods in the diet ...
Cohn D F - - 1983
Two hundred patients with chronic neurolathyrism were examined 25-35 years after the appearance of signs and symptoms of intoxication of the chickling pea. Their daily food intake, in a German forced labor camp during World War II, consisted of 400 g Lathyrus sativus peas cooked in water plus 200 g ...
Newbrun E - - 1982
Studies of special population groups, epidemiological surveys, controlled longitudinal studies of humans, and longitudinal studies on the effect of sugar substitutes indicate that frequent or high intake of sugary foods predisposes to dental decay. The relation is not always clear-cut, and most studies have important methodological problems and limitations. Longitudinal ...
Miletić V D - - 1982
A kinetic method for the evaluation of alternative pathway complement activity in man and mice is presented. A laser nephelometer was employed for detection of non-sensitized rabbit erythrocyte lysis based on the observation that the intensity of laser scatter (LS) is proportional to the number of erythrocytes in suspension. During ...
Berger M - - 1982
Purified human C3 was biotinylated using the biotinyl-N-hydroxysuccinimide imidoester (BNHS). Depending on the input of BNHS, from three to six molecules of biotin were incorporated per C3 molecule. The biotinyl-C3 retained over 90% of its specific hemolytic activity and when bound to sheep erythrocytes maintained its ability to adhere to ...
Lieberman H R - - 1983
We examined the behavioral effects of the dietary constituents tryptophan and tyrosine on human mood, sensorimotor performance and pain sensitivity. Tryptophan and tyrosine are neurotransmitter precursors present in varying amount in protein-containing foods. Tryptophan (50 mg/kg) increased subjective drowsiness and fatigue but unlike many hypnotics did not impair sensorimotor performance. ...
Iijima S - - 1982
Thirty seven years ago, 6 August 1945 marks the date of the first atomic bombing never experienced in human history. It was dropped on Hiroshima and this was followed by a second bombing three days later on Nagasaki. The total deaths following exposure to the bomb by the end of ...
Soffer Y - - 1981
A microbiological method, using the carnitine-requiring yeast, Torulopsis bovina ATCC 26014, was developed to identify samples of human semen which contained low levels (less than 250 micron M) of total carnitine. Of 399 semen samples from a male infertility clinic which were tested, 30 (7.5%) were low in carnitine. Of ...
Janghorbani M - - 1981
A method based on Radiochemical Neutron Activation Analysis (RNAA) is described which allows simultaneous measurement of two stable isotopes of calcium, 46Ca and 48Ca, in human feces, plasma, and urine for the purpose of studying human nutrition and metabolism of calcium. It is shown that these measurements can be made ...
Stasny J T - - 1981
It is the purpose of this paper to review and illustrate recent, pertinent, advances in detection methods for those food particle contaminants that have potential as hazards to human health or that elevate the risk for product liability disputes. Sources for the contamination of the human food supply include extraneous ...
Vaze A Y - - 1980
Levels of inhibin in the seminal plasma of oligozoospermic and normozoospermic semen and normal human accessory reproductive organs were estimated using specific and sensitive radioimmunoassay (RIA). Seminal inhibin content showed a positive correlation (r = 0.827) with the sperm concentration. Further, in the human accessory reproductive organs, prostate showed maximum ...
Susman R L - - 1979
Comparisons of hominoid metacarpals and phalanges reveal differences, many of which are closely linked to locomotor hand postures. The African apes display features of the metacarpals and phalanges which distinguish them from the other Hominoidea. These features are most evident in digits III and IV. The orangutan hand is demonstrably ...
Stenqvist O - - 1979
A method for the intravital microscopic study of the tracheal mucosal microcirculation in the rabbit is described. A low tracheostomy is performed for ventilation, while a hole cut in the ventral portion of the trachea cranial to the tracheostomy is used for observations. The trachea is immobilized by a fixation ...
< 1 2 3 4 5 6 7 8 9 10 11 >