Now showing items 111-120 of 134
Adaptation and major chromosomal changes in populations of Saccharomyces cerevisiae
(Springer-Verlag, 1992-07)
Thirteen independent populations of Saccharomyces cerevisiae (nine haploid and four diploid) were maintained in continuous culture for up to approximately 1000 generations, with growth limited by the concentration of organic ...
Nitrogen mineralization, nitrification and denitrification in upland and wetland ecosystems
(Springer-Verlag, 1991-10)
Nitrogen mineralization, nitrification, denitrification, and microbial biomass were evaluated in four representative ecosystems in east-central Minnesota. The study ecosystems included: old field, swamp forest, savanna, ...
The digestion of protein and carbohydrate by the stream detritivore, Tipula abdominalis (Diptera, Tipulidae)
(Springer-Verlag, 1980-09)
The digestive system of larvae of Tipula abdominalis (Diptera, Tipulidae), a stream detritivore, is poorly adapted for the digestion of the major polysaccharides in its diet, but well adapted for the digestion of protein. ...
Preproenkephalin messenger RNA—containing neurons in striatum of patients with symptomatic and presymptomatic huntington's disease: An in situ hybridization study
(Wiley Subscription Services, Inc., A Wiley Company, 1991-10)
Previous studies have revealed a loss of enkephalin immunoreactivity in the terminals of striatal neurons projecting to the external globus pallidus in patients with early grades of Huntington's disease (HD). To assess the ...
Observations on the temperature regulation and water economy of the galah (Cacatua roseicapilla)
(Elsevier, 1982)
1. 1. Galahs (Cacatua roseicapilla), like many other birds, undergo controlled hyperthermia in hot environments.2. 2. Basal metabolism of galahs (271 g) at night during summer averages 0.93 cm3O2 (g-hr)-1 vs 0.90 predicted.3. ...
Response of soil biota to elevated atmospheric CO 2 in poplar model systems
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-01)
We tested the hypotheses that increased belowground allocation of carbon by hybrid poplar saplings grown under elevated atmospheric CO 2 would increase mass or turnover of soil biota in bulk but not in rhizosphere soil. ...
Chlorpyrifos: Assessment of Potential for Delayed Neurotoxicity by Repeated Dosing in Adult Hens with Monitoring of Brain Acetylcholinesterase, Brain and Lymphocyte Neurotoxic Esterase, and Plasma Butyrylcholinesterase Activities
(Elsevier, 1993-07)
Chlorpyrifos: Assessment of Potential for Delayed Neurotoxicity by Repeated Dosing in Adult Hens with Monitoring of Brain Acetylcholinesterase, Brain and Lymphocyte Neurotoxic Esterase, and Plasma Butyrylcholinesterase ...
Eliminated sequences with different copy numbers clustered in the micronuclear genome of Tetrahymena thermophila
(Springer-Verlag, 1985-09)
As the ciliated protozoan Tetrahymena thermophila develops a new macronucleus (MAC) from products of its micronucleus (MIC), several repetitive sequences are eliminated from the MAC genome. Four MIC DNA clones containing ...
Patterns of fuel utilization by the thoracic muscles of adult worker ants. The use of lipid by a hymenopteran
(Elsevier, 1979)
1. 1. Patterns of fuel utilization in the thoracic muscles of three species of ants have been established.2. 2. The thoracic muscles of Formica ulkei exhibit a typical Hymenopteran metabolic organization, relying exclusively ...