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Now showing items 111-120 of 193
Sequence analysis of an Archaeal virus isolated from a hypersaline lake in Inner Mongolia, China
(BioMed Central, 2007)
Background: We are profoundly ignorant about the diversity of viruses that infect the domain
Archaea. Less than 100 have been identified and described and very few of these have had their
genomic sequences determined. ...
Crystal structure of saposin B reveals a dimeric shell for lipid binding
(National Academy of Sciences, 2003)
Saposin B is a small, nonenzymatic glycosphingolipid activator
protein required for the breakdown of cerebroside sulfates (sulfatides) within the lysosome. The protein can extract target lipids
from membranes, forming ...
HE0230–4323: an unusual pulsating hot subdwarf star
(Oxford University Press, 2007)
HE 0230−4323 is a known binary, consisting of a subdwarf star and a companion which is not
observable in the optical. Photometric measurements reported in this paper have shown it to be
both a reflection-effect and a ...
Don't cut that 'grass'
(Botanical Society of South Africa, 2006)
Introduction: Have you ever noticed the abundance
of wildflowers on public open
spaces during spring in Cape Town? I
suppose some Capetonians would be
aware of Rondebosch Common and
the astonishing botanical diversity ...
The Severe Acute Respiratory Syndrome Coronavirus 3a Protein Up-Regulates Expression of Fibrinogen in Lung Epithelial Cells
(American Society for Microbiology, 2005)
Here we analyzed the gene expression profile of cells that stably express the severe acute respiratory
syndrome coronavirus (SARS-CoV) 3a protein to determine its effects on host functions. A lung epithelial
cell-line, ...
A Softbridge with carrier grade reliability using JAIN SLEE
(Telkom, 2004)
We have built a SoftBridge prototype within a JAIN (Java APIs for the Integrated Network) SLEE (Service Logic Execution Environment). A SoftBridge is a semi-synchronous multimodal IP (Internet Protocol) -based communication ...
Statistical tests for changes in the amplitude, frequency or phase of a sinusoidal variation
(Oxford University Press, 2009)
The problem considered is that of testing for small changes over time in the properties of
a sinusoidal signal contaminated by noise. Two test statistics are proposed. The first is a
frequency domain statistic based on ...
Correcting CCD photometry of stars for seeing effects
(Oxford Univeristy Press, 2009)
Systematic variability in stellarmagnitudes, as derived from profile fitting to CCD images,may
in some instances be due to variable seeing. It is suggested that this happens in cases where the
stars are unresolved pairs, ...
Multivariate comparisons of the period–light-curve shape distributions of Cepheids in five galaxies
(Oxford University Press, 2007)
A number of published tests suitable for the comparison of multivariate distributions are
described. The results of a small power study, based on realistic Cepheid log period – Fourier
coefficient data, are presented. ...
Scale insects on ericas : an apparently natural, unnoticeable threat to local biodiversity
(Botanical Society of South Africa, 2008)
Introduction: An excursion into the Limietberg Nature Reserve in the Bain's Kloof Mountains during the winter of 2006, one that I have undertaken regularly over the past ten years or so, had revealed a noticeably high ...