Now showing items 41-50 of 100
Compounds of novel structure having kappa-agonist behavioral effects in Rhesus monkeys
(Elsevier, 2006-04-07)
The kappa-agonist behavioral effects of several compounds were studied in rhesus monkeys and mice. Rhesus monkeys trained to discriminate ethylketazocine from saline responded as if ethylketazocine had been administered ...
Impacts of major predators on tropical agroforest arthropods: comparisons within and across taxa
(Springer-Verlag, 2004-06)
In food web studies, taxonomically unrelated predators are often grouped into trophic levels regardless of their relative importance on prey assemblages, multiple predator effects, or interactions such as omnivory. Ants ...
Three ENU-induced neurological mutations in the pore loopof sodium channel Scn8a (Na v 1.6) and a genetically linkedretinal mutation, rd13
(Springer-Verlag, 2004-05)
The goal of The Jackson Laboratory Neuroscience Mutagenesis Facility is to generate mouse models of human neurological disease. We describe three new models obtained from a three-generation screen for recessive mutations. ...
Sources of reactive nitrogen affecting ecosystems in Latin America and the Caribbean: current trends and future perspectives
(Kluwer Academic Publishers; Springer Science+Business Media, Inc., 2006-04-06)
While the amount of reactive nitrogen circulating at the global level has increased markedly in the last century, the effects of this increase are largely seen at the regional level due to interacting ecological and ...
A parameter sensitivity methodology in the context of HIV delay equation models
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2005-06)
A sensitivity methodology for nonlinear delay systems arising in one class of cellular HIV infection models is presented. Theoretical foundations for a typical sensitivity investigation and illustrative computations are given.
Anthropogenic N deposition and the fate of 15 NO 3 − in a northern hardwood ecosystem
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-06)
Human activity has substantially increased atmospheric NO 3 − deposition in many regions of the Earth, which could lead to the N saturation of terrestrial ecosystems. Sugar maple ( Acer saccharum Marsh.) dominated northern ...
Production and export of dissolved C in arctic tundra mesocosms: the roles of vegetation and water flow
(Kluwer Academic Publishers; Springer Science+Business Media, 2002-09)
To better understand carbon (C) cycling in arctic tundra we measureddissolved C production and export rates in mesocosms of three tundra vegetationtypes: tussock, inter-tussock and wet sedge. Three flushing frequencies ...
Carbon dioxide and water vapor exchange in a warm temperate grassland
(Springer-Verlag, 2004-01)
Grasslands cover about 40% of the ice-free global terrestrial surface, but their contribution to local and regional water and carbon fluxes and sensitivity to climatic perturbations such as drought remains uncertain. Here, ...
Potent cytotoxins produced by a microbial symbiont protect host larvae from predation
(Springer-Verlag, 2004-03)
Larvae of the sessile marine invertebrate Bugula neritina (Bryozoa) are protected by an effective chemical defense. From the larvae, we isolated three bryostatin-class macrocyclic polyketides, including the novel bryostatin ...
A Comparative Study of Human Muscle and Brain Creatine Kinases Expressed in Escherichia coli
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 2000-01)
We report the expression of the human muscle (CK-MM) and brain (CK-BB) creatine kinases in Escherichia coli . The proteins have been purified to apparent homogeneity and several of their physical and kinetic properties ...