16,324 research outputs found
Metabolomic systems biology of trypanosomes
Metabolomics analysis, which aims at the systematic identification and quantification of all metabolites in biological systems, is emerging as a powerful new tool to identify biomarkers of disease, report on cellular responses to environmental perturbation, and to identify the targets of drugs. Here we discuss recent developments in metabolomic analysis, from the perspective of trypanosome research, highlighting remaining challenges and the most promising areas for future research
Thomson scattering in a low-pressure neon mercury positive column
The electron density and the electron temperature in a low-pressure neon mercury positive column are determined using Thomson scattering. Special attention has been given to the stray light reduction in the Thomson scattering setup. The results are obtained in a discharge tube with a 26 mm diam, 10 mbar of neon, a mercury pressure inbetween 0.14 and 0.85 Pa, and an electric current ranging from 100 to 400 mA. The systematic error in the electron density is 15%–45%, the statistical error is 25%–35%. The total error in the electron temperature is 15%–35%. ©2001 American Institute of Physics
Free dailies 2010: the age of the happy monopolist
Free newspapers were one of the big stories of the noughties, and came to symbolise the primacy of ‘free’ and the imminent demise of paid-for papers. No longer! Piet Bakker charts their rise and fall and describes the conditions in which some might thrive again
Die Civil Union Act, Draft Domestic Partnership Bill en moontlike deregulering van die huwelik
The Civil Union Act 17/2006 is compared to the Marriage Act 25/1961 to determinewhether similar life partnerships should be regulated by more than one act. Thereafter the Draft Domestic Partnership Bill is investigated to determine the intended future marriage law system of South Africa. It is clear from the discussion that a hierarchy of personal relationships exist. Such a hierarchy does not promote diversity and a meassure of deregulation of marriage is proposed as a more suitable solution
Special issue: New perspectives and approaches in 'plant growth-promoting rhizobacteria' research - Foreword
Validity of the single-particle description and charge noise resilience for multielectron quantum dots
We construct an optimal set of single-particle states for few-electron
quantum dots (QDs) using the method of natural orbitals (NOs). The NOs include
also the effects of the Coulomb repulsion between electrons. We find that they
agree well with the noniteracting orbitals for GaAs QDs of realistic
parameters, while the Coulomb interactions only rescale the radius of the NOs
compared to the noninteracting case. We use NOs to show that four-electron QDs
are less susceptible to charge noise than their two-electron counterparts.Comment: 11+ pages, 5 figure
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