Now showing items 1-10 of 584
Photography: Making every photon count
(Nature Publishing Group, 1999-12-23)
More than 150 years after the invention of photography, the underlying solid-state photochemistry is still being investigated and improved. One aspect of continual importance is the efficiency of the image-recording stage, ...
Optimised isolation procedure for biologically active compounds nimbolide and 28-deoxonimbolide from Azadirachta indica leaves
(Elsevier: Phytochemistry, 1999-12)
Alpha-linolenic acid has been isolated from fresh A. indica leaves and an optimised procedure for the isolation of the limonoids nimbolide and 28-deoxonimbolide is described.
The extended blue continuum and line emission around the Central Radio Galaxy in Abell 2597
(American Astronomical Society, 1999-11-10)
We present results from detailed imaging of the centrally dominant radio elliptical galaxy in the cooling flow cluster Abell 2597, using data obtained with the Wide Field and Planetary Camera 2 (WFPC2) on the Hubble Space ...
Studies on the ADP-ribose pyrophosphatase subfamily of the nudix hydrolases and tentative identification of trgB, a gene associated with tellurite resistance
(The American Society for Biochemistry and Molecular Biology: Journal of Biological Chemistry, 1999-11-05)
Four Nudix hydrolase genes, ysa1 from Saccharomyces cerevisiae, orf209 from Escherichia coli, yqkg from Bacillus subtilis, and hi0398 from Hemophilus influenzae were amplified, cloned into an expression vector, and transformed ...
Deaf workers can be heard from at Lucent
(Chicago Tribune, 1999-11)
When Gary Etkie started working at the former Bell Labs in 1981, he felt isolated. As the only deaf employee, he would go to the library at lunch because he had no one to communicate with.
A simple and complete purification of single-walled carbon nanotube materials
(Wiley: Advanced Materials, 1999-11)
Hope appears on the horizon for age-related hearing loss
(Dallas Morning News, 1999-10-12)
The loss of hearing associated with getting older is caused by chemical changes in the brain, as well as by problems in the inner ear. Yet researchers predict that the elderly soon will be able to take a pill to improve ...
Sensitized carrier generation in evaporated thin films and particle dispersions of benzimidazole perylene
(International Society for Optical Engineering, 1999-10)
We studied photoconductivity in particle dispersions and vacuum evaporated films of benzimidazole perylene (BZP) pigment in contact with a tetraphenyldiamine (TPD) hole transport layer. Xerographic photoreceptors based on ...
Nonlinear frequency-dependent selection at a single locus with two alleles and two phenotypes
(Springer Berlin / Heidelberg, 1999-10)
The paper investigates the discrete frequency dynamics of two phenotype diploid models where genotypic fitness is an exponential function of the expected payoff in the matrix game. Phenotypic and genotypic equilibria ...
Computer multimedia in the development of interactive courseware: The Cornell University soil and water management learning module
The thesis project consists of an interactive multimedia computer software program, designed to help teach a course title, college-level semester course in soil and water management (Soil and Water Management, offered ...