Now showing items 91-100 of 134
Determining the sources of calcium for migratory songbirds using stable strontium isotopes
(Springer-Verlag, 2001-02)
We investigated natural variations in the stable isotopic composition of strontium (a surrogate for calcium) in the bones of a single species of breeding migratory songbird, as well as in their eggshells, egg contents, and ...
Re-examination of the historical range of the greater prairie chickenusing provenance data and DNA analysis of museum collections
(Kluwer Academic Publishers; Springer Science+Business Media, Inc., 2006-02-21)
The extent to which a species has declined within its historical range is commonly used as an important criterion in categorizing the conservation status of wild populations. The greater prairie chicken ( Tympanuchus cupido ...
Thermoregulation and heterothermy in some of the smaller flying foxes (Megachiroptera) of New Guinea
(Springer-Verlag, 1970-06)
Body temperature, heterothermy, oxygen consumption, heart rate, and evaporative water loss were studied in four species of flying foxes (Megachiroptera), Dobsonia minor, Nyctimene major, Nyctimene albiventer , and Paranyctimene ...
The age structure of populations of Saccharomyces cerevisiae
(Elsevier, 1981-04)
A discrete deterministic model is described for the growth of an age-structured population of yeast, Saccharomyces cerevisiae, incorporating recent information on the asymmetry of cell division and control of the cell cycle ...
Spatial clustering of endemic Burkitt's lymphoma in high-risk regions of Kenya
(Wiley Subscription Services, Inc., A Wiley Company, 2007-01-01)
Endemic Burkitt's lymphoma (eBL), the most common childhood cancer in sub-Saharan Africa, occurs at a high incidence in western Kenya, a region that also experiences holoendemic malaria. Holoendemic malaria has been ...
The effects of size of opening in vegetation and litter cover on seedling establishment of goldenrods ( Solidago spp.)
(Springer-Verlag, 1983-11)
We investigated the effects of size of opening in the vegetation and litter cover on seedling establishment of two species of goldenrods ( Solidago spp.) in an abandoned field in southwestern Michigan, U.S.A. Seeds of S. ...
Origin and evolution of the vertebrate vomeronasal system viewed through system-specific genes
(Wiley Subscription Services, Inc., A Wiley Company, 2006-07)
Tetrapods have two distinct nasal chemosensory systems, the main olfactory system and the vomeronasal system (VNS). Defined by certain morphological components, the main olfactory system is present in all groups of ...
Microbial community composition and function beneath temperate trees exposed to elevated atmospheric carbon dioxide and ozone
(Springer-Verlag, 2002-04)
We hypothesized that changes in plant growth resulting from atmospheric CO 2 and O 3 enrichment would alter the flow of C through soil food webs and that this effect would vary with tree species. To test this idea, we ...
Morphogenic effects of halogenated thymidine analogues on Drosophila . I. Quantitative analysis of lesions induced by 5-bromodeoxyuridine and 5-fluorouracil
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1972-02)
When 5-fluorouracil (FU) is offered simultaneously with 5-bromodeoxyuridine (BUdR) to Drosophila larvae, a variety of bristle modifications and hyperplastic growths are found on the wings of the adult flies. Administration ...
Isolation of Sets of a, α, a/α, a/a and α/α isogenic strains in Saccharomyces cerevisiae
(Springer-Verlag; Springer-Verlag GmbH & Co. KG, 1982-10)
A simple, quick technique for isolating sets of a, α, a/α, a/a and α/α isogenic strains of the yeast, Saccharomyces cerevisiae is described. Isogenic a/α diploids arise in haploid populations by a rare heterothallic switch ...