We have developed and implemented parallel algorithms for the molecular dynamics simulation of synthetic polymer chains. Our package has been specifically designed for distributed–memory machines like the widespread Cray T3E, but it can also be used on clusters of workstations and on a single workstation (i.e., it runs also sequentially). The target molecules are single synthetic polymer chains...

Cross-linked and quaternized pine sawdust was tested for vanadium removal from a synthetic aqueous solution as well as from real industrial wastewater which had a considerable amount of vanadium and other ions such as sulphate, ammonium and nickel. The maximum vanadium sorption capacity of the modified pine sawdust was found to be 130 mg/g in synthetic solution and 103 mg/g in real wastewater. ...

keep in mind the importance of cadmium, cobalt and nickel ions as environmentally and economically strategic heavy metals, the application of two acidic extractants, named bis(2-diethylhexyl)phosphoric acid (dehpa) and 2-thenoyltrifluoroacetone (htta), was assessed for the extraction-recovery of these ions from leached solution of spent rechargeable ni-cd batteries. the conditions for leaching ...

All the synthetic detergents and bile salts I have tried denature proteins such as hemoglobin and egg albumin at the isoelectric point 1 and keep the denatured isoelectric protein in solution. Some detergents in sufficiently high concentration can prevent the precipitation of denatured protein by trichloracetic acid, tungstic acid, and acid ferric sulfate. In fact, the origin of the present inv...

/V-/j-Alanyldopamine (NBAD) has attracted a great deal of interest because of its significance in catecholamine metabolism in insects with which phenoloxidase is concerned.1' Kramer et al. synthesized NBADby coupling the acid component of /V-/?-alanine with the amine component of dopamine in aqueous solution.2' Their method, however, required several chromatographic steps to purify the syntheti...

Activity-based probes (ABPs) are powerful tools for functional proteomics studies. Their selectivity can be influenced by modification of a recognition element that interacts with pockets near the active site. For serine proteases there are a limited number of simple and efficient synthetic procedures for the development of selective probes. Here we describe a new synthetic route combining soli...

Introduction: Radiation therapy planning (RTP) is one of the clinical applications in which both CT scan and MRI are used. MR and CT images are applied to determine the target volume and calculation of dose distribution, respectively. In addition, using two imaging modalities increases the department workload and cost. In this study, an algorithm was presented to create synthet...

h-point standard addition method (hpsam) with simultaneous addition of both analytes in nonaqueous solution was applied for determination of levonorgestrel (lev) and ethinyl estradiol (ee)  in ld and hd tablets. the results showed that, simultaneous determination could be performed with the ratio 1 to 5 of lev-ee. the lod for lev and ee were obtained 5.1×10 -7 and 9.6×10 -7 m, respectively, and...

this paper presents analytical solutions and simulations for pressure transient behavior of the partially penetrating wells (ppws). the newman’s product method was adopted to develop the basic instantaneous source functions which characterize the response of ppws. these results were obtained based on the solution of fully penetrating wells (fpws) and they were presented in laplace domain. furth...