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2.
F. J. J. Buytendijk died on October 21st 1974 at the age of 87. His important contribution to the study of animal behaviour is analyzed here in relation to the historical development of animal psychology and ethology. The detailed study of his scientific production suggests, according to the authors, that some important findings, although largely not paid attention to in present-day literature, are akin to the conceptual and methodological evolution of comparative ethology. 相似文献
4.
This symposium discusses J.-L. Dessalles's account of the evolution of language, which was presented in Why we Talk (OUP 2007). 相似文献
8.
Radial distribution of soluble phenolics was investigated at different heights in stems of Juglans nigra, J. regia and hybrids J. nigra 23 × J. regia. Four major phenolic compounds were studied: hydrojuglone glucoside (HJG), quercitrin (QUER) and two unknown compounds
characterized as two ellagic acid derivatives E1 and E2. HJG and E1 content increased gradually in the sapwood, peaked in
the sapwood-heartwood transition zone, and decreased drastically in the heartwood. QUER was accumulated preferentially around
the transition zone, and its content was relatively low in the outer part of the sapwood and in the inner part of the heartwood.
E2 content was low in the sapwood and increased in the heartwood. The heartwood formation was marked by the accumulation of
new soluble compounds. The relationship between wood extractives and wood colour were evaluated and discussed. HJG was considered
to be a major precursor of heartwood colour providing chromophores through hydrolysis (deglucosylation), oxidation and polymerization
processes.
Received: 2 September 1997 / Accepted: 23 November 1997 相似文献
17.
Introduction. Over the last years we have been engaged in studies of the South American Pottiaceae. Among the bryophyte specimens collected by us in central and northern Peru, some samples of a puzzling Pottiaceae were found. In this paper, we present our arguments for recognising these plants as a new species and its inclusion in Erythrophyllopsis Broth. Key Results. It differs most saliently from other species of Erythrophyllopsis by the combination of its oblong-ovate to ovate-lanceolate leaves, with usually fragile apex, leaf margins papillose-crenulate from apex to lower third, sometimes erose or crenate, lamina unistratose, occasionally bistratose in patches, costa broad, usually ending below the apex, without dorsal stereids near the apex where they are replaced by cells similar to those of the lamina, and short and straight peristome teeth. Conclusions. A new moss species, Erythrophyllopsis perlaticosta M.J.Cano & J.A.Jiménez, is described and illustrated from the Andean highlands in central and northern Peru. A revised identification key for the species of Erythrophyllopsis is also provided. This species grows in crevices or fissures of calcareous rocks or banks between 3050 and 4700?m. The principal distinctive characters that separate it from the nearest species of Erythrophyllopsis and related genera such as Bryoerythrophyllum P.C.Chen and Mironia R.H.Zander are discussed. 相似文献
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