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Author  |
Welsh Da, |
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Title |
Population, behavioural, and grazing ecology of the Sable Island, Nova Scotia. |
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Manuscript |
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Year |
1975 |
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Thesis |
Ph.D. thesis |
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Publisher |
Dalhousie University |
Place of Publication |
Halifax |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1702 |
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Author |
Western D, |
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Title |
Water availability and its influence on the structure and dynamics of a savannah large mammal community |
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Journal Article |
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Year |
1975 |
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Abbreviated Journal |
E Afr Wildl J 1 |
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Volume |
3 |
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Pages |
265-288 |
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Notes |
from Professor Hans Klingels Equine Reference List |
Approved |
no |
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Serial |
1704 |
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Author |
Wood, F.E.; Cusanovich, M.A. |
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Title |
The reaction of Euglena gracilis cytochrome c-552 with nonphysiological oxidants and reductants |
Type |
Journal Article |
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Year |
1975 |
Publication |
Archives of Biochemistry and Biophysics |
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Volume |
168 |
Issue |
2 |
Pages |
333-342 |
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Abstract |
The reaction of Euglena gracilis cytochrome c-552 (cytochrome f) with the nonphysiological reactants potassium ferrocyanide, potassium ferricyanide, sodium ascorbate, sodium dithionite, and Chromatium vinosum high potential nonheme iron protein was studied by stopped-flow and temperature-jump kinetic methods. The reaction of the purified, water-soluble protein with the reactants was investigated as a function of ionic strength, pH, and temperature. The results demonstrated that reduction and oxidation takes place at a negatively charged site on the cytochrome c-552 surface. Participation of specific amino acid residues in electron transfer is implicated from the pH results. The results obtained for the nonphysiological reactions of cytochrome c-552 are compared with available data for horse heart cytochrome c and Rhodospirillum rubrum cytochrome c2. The results strongly suggest that Euglena gracilis cytochrome c-552 undergoes nonphysiological oxidation and reduction by a mechanism different from that found for cytochrome c or cytochrome c2. |
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no |
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Call Number |
refbase @ user @ |
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3987 |
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Author |
Zentall, T.R; Hogan, D.E. |
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Title |
Key pecking in pigeons produced by pairing keylight with inaccessible grain |
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Journal Article |
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Year |
1975 |
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Abbreviated Journal |
J Exp Anal Behav |
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Volume |
23 |
Issue |
2 |
Pages |
199-206 |
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In Experiment I, keylight was paired with inaccessible grain delivery (under two conditions of keylight intensity) to determine if autoshaping would occur in the absence of primary reinforcement. In Experiment II, the procedure was repeated with accessible grain, for comparison. In Experiment III, the procedures were repeated with explicitly unpaired presentations of keylight and either inaccessible or accessible grain. The results indicated that key pecking occurred as quickly in the presence of keylight pairings with inaccessible grain as with accessible grain, though (except for one bird) key pecking was not maintained with inaccessible grain. Furthermore, compared to the dim keylight, the bright keylight greatly suppressed key pecking when paired with inaccessible grain, and reduced the rate of key pecking when paired with accessible grain. Little key pecking occurred in groups exposed to explicitly unpaired presentations of keylight (whether bright or dim) and grain (whether accessible or inaccessible). When the birds in Experiment III were retested with explicitly paired presentations of keylight and grain, little key pecking was observed, suggesting suppressive effects of prior explicitly unpaired presentations. It is suggested that the effects of key-brightness manipulation were produced by the association of grain with cues other than the response key, or by distraction produced by partial illumination of the grain hopper. |
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English |
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0022-5002 |
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Notes |
PMID:16811840 |
Approved |
no |
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Call Number |
refbase @ user @ |
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273 |
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Author |
Zimen, E. |
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Title |
Social dynamics of the wolf pack |
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Book Chapter |
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Year |
1975 |
Publication |
The wild canids |
Abbreviated Journal |
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Pages |
336-362 |
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Van Nostrand Reinhold |
Place of Publication |
New York |
Editor |
Fox, M.W. |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5231 |
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