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Author |
Steinhoff, H.J. |
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Title |
A continuous wave laser T-jump apparatus and its application to chemical reactions in hemoglobin single crystals |
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Journal Article |
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Year |
1988 |
Publication  |
Journal of Biochemical and Biophysical Methods |
Abbreviated Journal |
J Biochem Biophys Methods |
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Volume |
15 |
Issue |
6 |
Pages |
319-330 |
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Keywords |
Animals; Chemistry; Crystallization; *Heat; *Hemoglobins; Horses/blood; *Lasers; Methemoglobin; Solutions; Thermodynamics; Thiocyanates |
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Abstract |
A laser temperature jump apparatus is constructed where the T-jump is achieved by means of the direct absorption of continuous laser radiation of low intensity by a solid sample. The final temperature in the irradiated volume element is reached when the absorbed radiation power equals the dissipation of heat by heat conduction. The time range from the beginning of irradiation to the stationary state depends on the geometry of the irradiated volume element and is less than 10 ms. The heating laser beam is simultaneously used to detect the relaxation to the new chemical equilibrium in the sample. Relaxation processes with relaxation rates between 10(2) s-1 and less than 10(-3) s-1 on samples with volumes less than 10(-3) mm3 may be investigated using this T-jump method. One application of this method is the determination of reaction rates of ligand reactions in hemoglobin single crystals. Rate constants obtained for the reaction of thiocyanate with crystallized horse methemoglobin are presented. |
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Institut fur Biophysik, Ruhr-Universitat Bochum, F.R.G |
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0165-022X |
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PMID:3379245 |
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Call Number |
Equine Behaviour @ team @ |
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3804 |
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Author |
Fuller, T.K.; Sampson, B.A. |
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Title |
Evaluation of a simulated howling survey for wolves |
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Year |
1988 |
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J Widl Manag |
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52 |
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Equine Behaviour @ team @ Fuller1988 |
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6458 |
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Author |
Holzapfel, W.H.; Botha, S.J. |
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Title |
Physiology of Sporolactobacillus strains isolated from different habitats and the indication of in vitro antagonism against Bacillus species |
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Journal Article |
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Year |
1988 |
Publication |
International Journal of Food Microbiology |
Abbreviated Journal |
Int J Food Microbiol |
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Volume |
7 |
Issue |
2 |
Pages |
161-168 |
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Keywords |
Animals; Bacillaceae/isolation & purification/*physiology; Bacillus/*physiology; Cattle; *Ecology; Feces/*microbiology; Food Microbiology; Horses; Sewage; Sheep; Water Microbiology |
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In an ecological study only low numbers of Sporolactobacillus were found in habitats such as the faeces of herbivores, the rumen of cattle and the final waste water of an abattoir. Their presence in the final waste water of an abattoir indicates their possible association with food, and, more specifically, with meat. Differences were found in some physiological characteristics. One isolate (L2404) differed from the authentic Sporolactobacillus ATCC 15538 by its inability to ferment inulin, its growth in presence of 6.5% NaCl and in 0.2% tellurite, by the isomer(s) of lactic acid produced and the mol% G + G in the DNA. One Sporolactobacillus isolate (L2407) showed antagonism against Bacillus cereus, Bacillus cereus var, mycoides, Bacillus megaterium and Bacillus subtilis. |
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Department of Microbiology and Plant Pathology, University of Pretoria, Republic of South Africa |
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0168-1605 |
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PMID:3275317 |
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Equine Behaviour @ team @ |
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2675 |
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Author |
Kruska, D. |
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Title |
Mammalian domestication and its effect on brain structure and behavior |
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Year |
1988 |
Publication |
Intelligence and Evolutionary Biology |
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Springer-Verlag |
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New York |
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Jerison, H.J.; Jerison, I. |
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Equine Behaviour @ team @ Kruska1988 |
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6232 |
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Author |
Galdikas BMF |
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Title |
Orangutan diet, range, and activity at Tanjung Puting, Central Borneo |
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Year |
1988 |
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Int. J. Primatol. |
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9 |
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1 |
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Equine Behaviour @ team @ |
Serial |
2996 |
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Author |
Hayes, K. |
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Title |
Temperament tip-offs. |
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Journal Article |
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Year |
1988 |
Publication |
Horse and Rider |
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11 |
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47-84 |
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Equine Behaviour @ team @ |
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4822 |
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Author |
Sugiyama Y; Koman J; Bhoye Show M |
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Title |
Ant-catching wands of wild chimpanzees at Bossou, Guinea |
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Journal Article |
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Year |
1988 |
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Folia Primatol. |
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51 |
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56 |
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Equine Behaviour @ team @ |
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3042 |
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Author |
Houston, A.I.; McNamara, J.M. |
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Title |
Fighting for food: a dynamic version of the Hawk-Dove game |
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Journal Article |
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Year |
1988 |
Publication |
Evolutionary Ecology |
Abbreviated Journal |
Evol. Ecol. |
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2 |
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1 |
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51-64 |
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refbase @ user @ |
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750 |
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Author |
de Waal, F.B.M.; Luttrell, L.M. |
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Title |
Mechanisms of social reciprocity in three primate species: Symmetrical relationship characteristics or cognition? |
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Journal Article |
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Year |
1988 |
Publication |
Ethology and Sociobiology |
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9 |
Issue |
2–4 |
Pages |
101-118 |
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Keywords |
Reciprocity; Agonistic intervention; Cognition; Chimpanzees; Macaques |
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Agonistic intervention behavior was observed in captive groups of chimpanzees (Pan troglodytes), rhesus monkeys (Macaca mulatta), and stumptail monkeys (M. arctoides). Reciprocity correlations of interventions were determined while removing from the data the effects of several symmetrical relationship characteristics, that is, matrillineal kinship, proximity relations, and same-sex combination. It was considered likely that if significant reciprocity persisted after controlling for these characteristics, the reciprocity was based on cognitive mechanisms. Statistical significance was tested by means of recently developed matrix permutation procedures. All three species exhibited significant reciprocity with regard to beneficial interventions, even after controlling for symmetrical traits. Harmful interventions were, however, reciprocal among chimpanzees only. This species showed a “revenge system”, that is, if A often intervened against B, B did the same to A. In contrast, both macaque species showed significantly inversed reciprocity in their harmful interventions: if A often intervened against B, B rarely intervened against A. Further analysis indicates that the strict hierarchy of macaques prevents them from achieving complete reciprocity. Compared to chimpanzees, macaques rarely intervene against higher ranking group members. The observed contrast can be partially explained on the basis of differences in available space, as indicated by a comparison of indoor and outdoor living conditions for the chimpanzee colony. Yet, even when such spatial factors are taken into account, substantial behavior differences between chimpanzees and macaques remain. |
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ISSN |
0162-3095 |
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Equine Behaviour @ team @ |
Serial |
5809 |
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Author |
Black, J.M. |
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Title |
Preflight Signalling in Swans: A Mechanism for Group Cohesion and Flock Formation |
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Journal Article |
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Year |
1988 |
Publication |
Ethology |
Abbreviated Journal |
Ethology |
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Volume |
79 |
Issue |
2 |
Pages |
143-157 |
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Abstract The preflight behaviour of whooper swans Cygnus cygnus and Bewick's swans Cygnus columbianus bewickii was examined to determine the adaptive significance of the ritual. Analysis of the preflight sequence revealed that the rate of signalling became significantly faster as the time of takeoff approached. This provides the first quantitative evidence that a threshold of excitability is responsible for triggering synchronised flight in social units. Two ultimate and two proximate factors that affect this threshold were uncovered. They are: 1) Maintaining proximity to partners—flight was delayed by birds with non-attentive mates and signalling lasted on average four times longer than those whose mates showed more interest. 2) Maintaining flock cohesiveness—birds which performed signals for longer periods while swimming among uninterested birds were successful in attracting followers 61% of the time. 3) The bird's feeding performance related to dominance status—less successful feeders (potentially hungry birds), flew after little time and few signals. 4) The type of feeding opportunity at the eventual destination—birds which flew to provided feeds (nutritious barley) spent less time performing preflight signals than when they flew to forage on grass fields. |
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Blackwell Publishing Ltd |
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1439-0310 |
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Equine Behaviour @ team @ |
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5315 |
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