Adequate assessment of solar radiation data is crucial for planning and designing energy systems. However, a major challenge facing technologies the availability at specific area interest. In this paper sunshine duration from 29 stations in Zimbabwe were used to generate both monthly annual Angstrom-Prescott (A-P) type coefficients, b, that are location based. The coefficients developed using l...

Various metal cations in physiological solutions interact with lipid headgroups in biological membranes, having an impact on their structure and stability, yet little is known about the molecular-scale dynamics of the lipid-ion interactions. Here we directly investigate the extensive lipid-ion interaction networks and their transient formation between headgroups in a dipalmitoylphosphatidylchol...

The structure of epothilone A, bound to , -tubulin in zinc-stabilized sheets, was determined by a combination of electron crystallography at 2.89 angstrom resolution and nuclear magnetic resonance–based conformational analysis. The complex explains both the broad-based epothilone structureactivity relationship and the known mutational resistance profile. Comparison with Taxol shows that the lon...

In order to solve increasingly challenging protein structures with crystallography, crystallization reagents and screen formulations are regularly investigated. Here, we briefly describe 96-condition screens developed at the MRC Laboratory of Molecular Biology: the LMB sparse matrix screen, Pi incomplete factorial screens, the MORPHEUS grid screens and the ANGSTROM optimization screen. In this ...

Biological Applications of Scanning Probe Microscopy. Scanning probe microscopes (SPMs) have now become established as the foremost tools in the imaging of surfaces and surface–confined structures at up to angstrom resolution. Whilst spectroscopic methods such as Raman, ellipsometry and surface plasmon resonance continue to provide useful information on interfaces, they remain tools of restrict...

Selective synthesis of particles of angstrom to nanometer size consisting of one to many metal atoms is instrumental in various applications, but it has been hampered by the tendency of the metal atom to form large clusters. We found, as studied by the state-of-the-art electron microscopic technique, a strategy to produce metal-containing nanoparticles isolated from each other by depositing met...

We study positive solutions of the Dirichlet problem for —Ají = up — A, p > 1, A > 0, on the unit ball 0. We show that there exists a positive solution (uo, Ao) of this problem which satisfies in addition duo/dn = 0 on âfî. We prove also that at (uo,Ao), the symmetry breaks, i.e. asymmetric solutions bifurcate from the positive radial solutions.

Interference patterns are not only a defining characteristic of waves, but also have several applications; characterization of coherent processes and holography. Spatial holography with electron waves, has paved the way towards space-resolved characterization of magnetic domains and electrostatic potentials with angstrom spatial resolution. Another impetus in electron microscopy has been introd...