Summary This article compares two operational research methods for the choice of the optimal flow scheme in separation chemistry. It is concluded that dynamic programming offers more advantages than the application of the theory of graphs.
Optimierung von Fliediagrammen für Ionenaustauschtrennungen durch dynamische Programmierung
Zusammenfassung 2 Methoden zur Auswahl des optimalen Fließdiagramms für Trennungsverfahren werden verglichen, wobei gezeigt wird, daß die dynamische Programmierung mehr Vorteile bietet als die Anwendung der Graphentheorie.
Lecture presented at Euroanalysis I Conference, 28. 8.–1. 9. 1972 in Heidelberg. 相似文献
Applied Biochemistry and Biotechnology - A continuous particle fluidized-bed reactor is being developed for the simultaneous fermentation and purification of lactic acid. Unlike conventional... 相似文献
Are only certain people destined to be multicreative—capable of unique and meaningful contributions across unrelated domains? In this article, we argue that all students have multicreative potential. We discuss this argument in light of different conceptions of creativity and assert that the likelihood of expressing multicreative potential varies across levels of creativity (most likely at smaller-c levels of creativity; least likely at professional and eminent levels of creativity). We close by offering considerations for how math educators might nurture the multicreative potential of their students. 相似文献
Get into the groove : The first high‐resolution structure of a foldamer bound to a protein target is described (see picture; foldamer in sticks). The foldamer consists of α‐ and β‐amino acid residues and is bound to the anti‐apoptotic protein Bcl‐xL. The overall binding mode and key interactions observed in the foldamer/Bcl‐xL complex mimic those seen in complexes of Bcl‐xL with natural α‐peptide ligands. Additional contacts in the foldamer/Bcl‐xL complex involving β‐amino acid residues appear to contribute to binding affinity.
Thermodynamic pKa values for benzimidazole and several substituted benzimidazoles were determined by CE. Electrophoretic mobilities of benzimidazoles were determined by CE at different pH levels and ionic strengths. The dependence of electrophoretic mobilities on pH was used to obtain pKa values at different ionic strengths. Extrapolations to zero ionic strength were used to determine the thermodynamic pKa values. Using this method the thermodynamic pKa values of 15 benzimidazoles were determined and found to range from 4.48 to 7.38. Results from the CE measurements were compared with spectrophotometric measurements which were evaluated at wavelengths where the highest absorbance difference for varying pH was recorded. The two analytical techniques were in good agreement. 相似文献
Coherent anti-Stokes Raman scattering microscopy is performed on glassy systems of poly(methylmethacrylate) colloidal particles in density- and refractive-index-matched solvents. Samples are prepared with varying amounts of linear polystyrene, which induces a depletion driven attraction between the nearly hard-sphere particles. Images collected over several hours confirm the existence of a reentrant glass transition. The images also reveal that the dynamics of repulsive and attractive glasses are qualitatively different. Colloidal particles in repulsive glasses exhibit cage rattling and escape, while those in attractive glasses are nearly static while caged but exhibit large displacements upon (infrequent) cage escape. 相似文献