Topic
Reagent
About: Reagent is a research topic. Over the lifetime, 60091 publications have been published within this topic receiving 1234928 citations. The topic is also known as: reagens.
Papers published on a yearly basis
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01 Jan 2000TL;DR: The formation of silica shells on core silver particles by a modified Stöber process was investigated and the coated particles were characterized using UV-visible spectroscopy, transmission electron microscopy, and electrophoresis.
Abstract: The formation of silica shells on core silver particles by a modified Stober process was investigated and the coated particles were characterized using UV–visible spectroscopy, transmission electron microscopy, and electrophoresis. The deposition conditions, such as reagent concentrations and reaction time, were optimized in order to obtain uniform surface layers of silica and to avoid excess precipitation of the latter.
190 citations
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TL;DR: The improvement in the decomposition levels reached by the combined processes, due to the generation of the very reactive hydroxyl radicals, in relation to the single oxidants is clearly demonstrated and evaluated by kinetic modeling.
190 citations
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25 Jun 1976TL;DR: In this paper, a multilayer element for the analysis of liquids such as biochemical and biological liquids is proposed, which includes a reagent layer including a composition that is interactive in the presence of a predetermined substance to be analyzed (analyte) to provide a diffusible, detectable species, and a registration layer that is permeable to the detectable species and within which such species, e.g., a dye, can be detected.
Abstract: The present invention concerns a multilayer element for the analysis of liquids such as biochemical and biological liquids. Elements according to the invention include (1) a reagent layer including a composition that is interactive in the presence of a predetermined substance to be analyzed (analyte) to provide a diffusible, detectable species, and (2) a registration layer that is permeable to the detectable species and within which such species, e.g., a dye, can be detected. Also within the element, preferably between the reagent layer and the registration layer, there can be a radiation-blocking layer, such as an opaque reflecting layer, to enhance detection of the diffusible species within the registration layer. The element can also include a spreading layer, preferably separated from the registration layer by a reagent layer. In operation, a sample of liquid under analysis is applied to the reagent layer of the element or, if present, to a spreading layer. If the sample contains analyte that the element is intended to detect, chemical reaction or other interaction within the reagent layer provides a detectable species that diffuses, via any intervening layers such as a radiation-blocking layer, into the registration layer for detection there, such as by radiometric techniques like reflection spectrophotometry.
190 citations
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190 citations
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16 Sep 1976
TL;DR: In this paper, a cuvette for sampling with a cavity which is defined by two planar surfaces which are placed or can be placed at a predetermined distance from one another is presented, where a reagent is contained in the cavity in an amount which is exactly determined in relation to the volume of the cavity.
Abstract: A cuvette for sampling with a cavity which is defined by two planar surfaces which are placed or can be placed at a predetermined distance from one another. A reagent is contained in the cavity in an amount which is exactly determined in relation to the volume of the cavity. The sample is drawn into the cavity preferably by capillary force and mixed with the reagent therein spontaneously or by vibration, whereupon optical analysis takes place directly through the two planar surfaces.
190 citations