Die selektive Bestimmung von Nickelionen

Ohne Zusammenfassung     

Étude sur le dosage colorimétrique du cuivre au diéthyldithiocarbamate (en milieu sodique)

In the colorimetric determination of copper by sodium diethyldithiocarbamate, the alkaline-tartaric medium prevents the development of the parasitic coloration due to the presence of nickel. The introduction of trilon hah no effect in alkaline medium.     

Die Entionisierung von Elektrolyten durch Elektrolyse an Ionenaustauscher-membranen und die selektive Anionentrennung

Ohne Zusammenfassung     

Pyridin-2-azo-p-dimethylanilin

Ohne Zusammenfassung     

Weak descartes systems in generalized spline spaces

A class of generalized spline spaces is introduced for which a basis of functions with local support is constructed by using a recursion relation. It is shown that this basis forms a weak Descartes system. Moreover, an interpolation property is given.     

Discovery of a herbicidal lead using polymer-bound activated esters in generating a combinatorial library of amides and esters

Summary A combinatorial library containing mixtures of amides and esters was prepared through solid-phase chemistry. The advantages of using solid-phase chemistry over solution-phase chemistry to prepare this library are discussed. The library was screened through a high-throughput whole organism herbicidal assay upon which a mixture containing amides was found to have herbicidal activity. Deconvolution of the mixture providedN-(3-benzoylphenyl)-3-(1,1-dimethylethyl)-1-methyl)-1H-pyrazole-5-carboxamide as a herbicidal lead with broadleaf and narrowleaf pre-emergence herbicidal activity as low as 100 g/ha on some weed species. This study represents the first report of an agrochemical discovered using a combinatorial approach. Supplementary Material, comprising experimental procedures for the preparation of resin II and the reaction of II with nucleophiles, GC/MS and LC/MS data for the reaction ofII with morpholine, and a detailed experimental for the preparation of 2 with characterization data, is available upon request.