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In response to my analysis of the Wellstone tragedy (READER WEEKLY, 28 November 2002, pp. 18-19) and related discussion of this event, I have received quite a few emails, many of which have taken strong exception to the very idea that George W. Bush could ever have been involved in something of this kind. My suggestion that Republicans may have been motivated to take Wellstone out, alas, is not...
A graphics package has been developed to display the main chain torsion angles phi, psi (phi, Psi); (Ramachandran angles) in a protein of known structure. In addition, the package calculates the Ramachandran angles at the central residue in the stretch of three amino acids having specified the flanking residue types. The package displays the Ramachandran angles along with a detailed analysis ou...
A coarse-grained molecular dynamics simulation was used to investigate the stress-strain behavior of nanorod-filled polymer composites. The effects of the interfacial interaction, aspect ratio of fillers, filler functionalization, chemical couplings between the polymer and the filler and the filler loading on the mechanical reinforcement were explored. The results indicate that there exists an ...
A manageable, relatively inexpensive model was constructed to predict the loss of nitrogen and phosphorus from a complex catchment to its drainage system. The model used an export coefficient approach, calculating the total nitrogen (N) and total phosphorus (P) load delivered annually to a water body as the sum of the individual loads exported from each nutrient source in its catchment. The exp...
This study evaluated spinal loads associated with lifting and hanging heavy mining cable in a variety of postures. This electrical cable can weigh up to 10 kg per metre and is often lifted in restricted spaces in underground coal mines. Seven male subjects performed eight cable lifting and hanging tasks, while trunk kinematic data and trunk muscle electromyograms (EMGs) were obtained. The eight...
Electrospinning of poly (L-D-lactic acid) (PLA) was investigated with the addition of multi-walled carbon nanotubes (MWNT) for development of a scaffold for tissue engineering. Through this experiment, it was determined that the optimal concentration of PLA with weight average molecular weight (Mw) 250,000 g/mol is 20 wt % as indicated by scanning electron microscopy. This concentration produce...
BACKGROUND The polyacrylic resin Amberlite IRA-67 is a promising adsorbent for lactic acid extraction from aqueous solution, but little systematic research has been devoted to the separation efficiency of lactic acid under different operating conditions. METHODOLOGY/PRINCIPAL FINDINGS In this paper, we investigated the effects of temperature, resin dose and lactic acid loading concentration o...
P. del Amo Sanchez, J. P. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, D. A. Milanes, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, D.N. Brown, L. T. Kerth, Yu. G. Kolomensky, G. Lynch, I. L. Osipenkov, H. Koch, T. Schroeder, D. J. Asgeirsson, C. Hearty, T. S. Mattison, J. A. McKenna, A. Khan, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B....
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