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Author Steinhoff, H.J.; Lieutenant, K.; Redhardt, A.
Title Conformational transition of aquomethemoglobin: intramolecular histidine E7 binding reaction to the heme iron in the temperature range between 220 K and 295 K as seen by EPR and temperature-jump measurements Type Journal Article
Year 1989 Publication Biochimica et Biophysica Acta Abbreviated Journal Biochim Biophys Acta
Volume (down) 996 Issue 1-2 Pages 49-56
Keywords Animals; Electron Spin Resonance Spectroscopy; Heme; Histidine; Horses; Humans; Hydrogen-Ion Concentration; Methemoglobin/*ultrastructure; Motion; Protein Conformation; Temperature; Thermodynamics; Water
Abstract Temperature-dependent EPR and temperature-jump measurements have been carried out, in order to examine the high-spin to low-spin transition of aquomethemogobin (pH 6.0). Relaxation rates and equilibrium constants could be determined as a function of temperature. As a reaction mechanism for the high-spin to low-spin transition, the binding of N epsilon of His E7 to the heme iron had been proposed; the same mechanism had been suggested for the ms-effect, found in temperature-jump experiments on aquomethemoglobin. A comparison of the thermodynamic quantities, deduced form the measurements in this paper, gives evidence that indeed the same reaction is investigated in both cases. Our results and most of the findings of earlier studies on the spin-state transitions of aquomethemoglobin, using susceptibility, optical, or EPR measurements, can be explained by the transition of methemoglobin with H2O as ligand (with high-spin state at all temperatures) and methemoglobin with ligand N epsilon of His E7 (with a low-spin ground state). Thermal fluctuations of large amplitude have to be postulated for the reaction to take place, so this reaction may be understood as a probe for the study of protein dynamics.
Address Institut fur Biophysik, Ruhr-Universitat Bochum, F.R.G
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ISSN 0006-3002 ISBN Medium
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Notes PMID:2544230 Approved no
Call Number Equine Behaviour @ team @ Serial 3803
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Author Herder, S.L.
Title More cardiac dressage: galop, gallop, gal(l)opitty glop Type Journal Article
Year 1989 Publication JAMA : the Journal of the American Medical Association Abbreviated Journal Jama
Volume (down) 262 Issue 3 Pages 352
Keywords Animals; Gait; *Heart Rate; Horses; Humans; Terminology; *Wit and Humor
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ISSN 0098-7484 ISBN Medium
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Notes PMID:2739033 Approved no
Call Number Equine Behaviour @ team @ Serial 3757
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Author Galdikas, B.M.
Title Orangutan tool use Type Journal Article
Year 1989 Publication Science (New York, N.Y.) Abbreviated Journal Science
Volume (down) 243 Issue 4888 Pages 152
Keywords Animals; Animals, Wild; *Behavior, Animal; Cognition; *Hominidae; Humans; *Pongo pygmaeus
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ISSN 0036-8075 ISBN Medium
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Notes PMID:2911726 Approved no
Call Number Equine Behaviour @ team @ Serial 2847
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Author Cheney, D.L.; Seyfarth, R.M.
Title Reconciliation and redirected aggression in vervet monkeys, Behaviour Type Journal Article
Year 1989 Publication Behaviour Abbreviated Journal Behaviour
Volume (down) 110 Issue Pages 258-275
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 4865
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Author Fragaszy, D.M.; Visalberghi E.
Title Social influences on the acquisition of tool-using behaviors in tufted capuchin monkeys (Cebus apella) Type Journal Article
Year 1989 Publication Journal of Comparative Psychology Abbreviated Journal J. Comp. Psychol.
Volume (down) 103 Issue 2 Pages 159-170
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Abstract To identify behaviors related to acquisition of tool-use in tufted capuchins (Cebus apella), we presented two tool-using tasks to two groups, extending findings by Westergaard and Fragaszy (1987) and Visalberghi (in press). Five Ss learned to use the tools in each task. The primary predictor of success was level of interest in the task. Observation of others at the apparatus did not facilitate exploratory behaviors or contact with the tools in the observers. Most animals performed exploratory behaviors more often when they were at the apparatus alone than when with another, whether or not the other was using a tool. Observers were quick to learn the relationship between another's activities and the appearance of food. We conclude that capuchins do not readily learn about instrumental relations by observation of others or imitate other's acts. Imitation probably plays no role in the spread of novel instrumental behaviors among monkeys. (PsycINFO Database Record (c) 2010 APA, all rights reserved)
Address social influences, acquisition of tool using
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Call Number Equine Behaviour @ team @ Serial 2993
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Author Povinelli DJ
Title Failure to find self-recognition in Asian elephants (Elephas maximus) in contrast to their use of mirror cues to discover hidden food Type Journal Article
Year 1989 Publication J. Comp. Psychol. Abbreviated Journal
Volume (down) 103 Issue Pages 122
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 3026
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Author Izraely, H.; Choshniak, I.; Shkolnik, A.; Stevens, C.E.; Demment, M.W.
Title Factors determining the digestive efficiency of the domesticated donkey.(Equus Asinus Asinus ) Type Journal Article
Year 1989 Publication Q J Exp Physiol Abbreviated Journal Q J Exp Physiol
Volume (down) 74 Issue 1 Pages 1-6
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Abstract Factors determining the digestive efficiency of donkeys were studied in animals fed either a low quality roughage (wheat straw: 77{middle dot}1% neutral detergent fibre, 2{middle dot}8% crude protein) or a high quality forage (alfalfa hay: 47{middle dot}5% neutral detergent fibre, 22{middle dot}7% crude protein). The neutral detergent fibre (NDF) intake when fed wheat straw was 1693 {+/-} 268 g animal-1 day-1, 10% higher than when fed alfalfa hay. Digestive coefficient of NDF and acid detergent fibre (ADF) when fed wheat straw amounted to 50{middle dot}9 {+/-} 4{middle dot}9 and 42{middle dot}0 {+/-} 4{middle dot}1% respectively. NDF and ADF apparent digestibilities and mean retention times (37{middle dot}7 {+/-} 1{middle dot}7 and 36{middle dot}4 {+/-} 3{middle dot}2 h respectively) were not significantly different (P [rang] 0{middle dot}05) between the two diets. The donkey appears to digest cell wall constituents as efficiently as the Bedouin goat when on low quality roughage, but less efficiently when fed alfalfa hay. Its energy digestibility is, however, as high as that reported for the Bedouin goat. The donkey's high energy digestibility is related to its capacity to digest soluble food components more efficiently than the ruminant. The mean retention time in the donkey is shorter than in the Bedouin goat and is consistent with its capacity to compensate for a lower quality diet by increasing its intake rate. Recycling of urea in donkeys maintained on wheat straw amounted to 75{middle dot}5 {+/-} 13{middle dot}0% of the entry rate. A decrease in the rate of renal urea filtration, coupled with an increase in the fraction reabsorbed, increased the retention of nitrogenous waste and permitted recycling of nitrogen into the gut. N1 -
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Notes from Professor Hans Klingels Equine Reference List Approved yes
Call Number Serial 1216
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Author Hunter, L.; Houpt, K..A.
Title Bedding material preferences of ponies. Type Journal Article
Year 1989 Publication Journal of American Society of Animal Science Abbreviated Journal J Anim Sci
Volume (down) 67 Issue 8 Pages 1986-1991
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Abstract The bedding preferences of ponies were determined using video recordings of nighttime (1900 to 0700) behavior of individually housed ponies. The ponies' behavior each minute was recorded to determine time budgets. In Exp. I, preference for bedding was determined using three mares, three stallions and two geldings given access to bedded and unbedded areas in a box stall. The ponies spent more time (66%) on the bedded area and were never observed lying on the unbedded areas. In Exp. II, three mares and six stallions were given access to a box stall, one side of which was bedded with wood shavings and the other with straw. Although some individual animals preferred one bedding over the other, neither form of bedding was preferred consistently. Time budgets in Exp. II were similar on both bedding materials. The ponies spent 12% of their nighttime lying, 2% walking, 35% eating and 50% standing inactively. Some ponies had a relatively strong preference for bedding, but the type of bedding preferred varied with the individual animal. Some individual ponies had no clear preference, but instead had a side or position preference
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Notes from Professor Hans Klingels Equine Reference List Approved yes
Call Number Serial 1211
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Author Ginsberg, J.R.,
Title The ecology of female behaviour and male mating success in the Grevy's zebra Type Journal Article
Year 1989 Publication Symposium of the Zoological Society of London Abbreviated Journal Symp zool Soc Lond
Volume (down) 61 Issue Pages 89-110
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Notes from Professor Hans Klingels Equine Reference List Approved yes
Call Number Serial 1112
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Author Chandler M; Fritz AS; Hala S
Title Small scale deceit: deception marker of 2-, 3- and 4-year-olds' early theories of mind Type Journal Article
Year 1989 Publication Child Dev. Abbreviated Journal
Volume (down) 60 Issue Pages 1263
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Notes Approved no
Call Number Equine Behaviour @ team @ Serial 2986
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