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Gradients of absorption-line strengths in elliptical galaxies
(1999-12-20)
We have restudied line-strength gradients of 80 elliptical galaxies. Typical metallicity gradients of elliptical galaxies are Delta[Fe/H]/Delta log r similar or equal to -0.3, which is flatter than the gradients predicted ...
Selective discrimination learning impairments in mice expressing the human Huntington's disease mutation
(1999-12-01)
Cognitive decline is apparent in the early stages of Huntington's disease and progressively worsens throughout the course of the disease. Expression of the human Huntington's disease mutation in mice (R6/2 line) causes a ...
Evolution of dust extinction and supernova cosmology
(1999-12-01)
We have made a quantitative calculation for the systematic evolution of the average extinction by interstellar dust in host galaxies of high-redshift Type Ia supernovae by using a realistic model of photometric and chemical ...
A Subarcsecond Resolution Near infrared Study of Seyfert and “Normal” Galaxies. I. Imaging Data
(1999-12)
We present new high-resolution near-infrared observations in the J, H, and K bands, obtained to study the properties of Seyfert host galaxies. The data set consists of images in the three bands of practically the entire ...
Wired in the Country
(1999-11-25)
Mutation analysis of cis-elements in the 3'- and 5'-untranslated regions of satellite tobacco necrosis virus strain C RNA
(1999-11-10)
The putative, 3'-terminal stem-loop structure in satellite tobacco necrosis virus strain C (STNV-C) RNA constitutes an essential cis-acting structure for the promotion of negative-strand RNA synthesis and a single- stranded ...
Nutrient management strategies of small-holder farmers in a short-fallow farming system in north-east Nigeria
(1999-11)
This paper presents the results of a study into farmers' management of nutrient dynamics in a short-fallow farming system in northern Nigeria. The research described and quantified the main nutrient flows into and out of ...
Conducting randomized trials in general practice : methodological and practical issues
(1999-11)
The evaluation of the outcome of health services technologies is a requirement for their efficient provision in clinical practice. The most reliable evidence for treatment efficacy comes from randomized trials. Randomized ...
Expression of the pea (Pisum sativum L.) α-tubulin gene TubA1 is correlated with cell division activity
(1999-11-01)
Microtubules are thought to be major determinants of plant morphogenesis, through effects on planes of cell division and on directions of differential cell expansion. In differentiation and redifferentiation processes, ...