Color reaction

About: Color reaction is a research topic. Over the lifetime, 1194 publications have been published within this topic receiving 19579 citations.

Antibiotic abb102 and preparation thereof

Abstract: NEW MATERIAL:Antibiotic AB-102 showing the following physicochemical properties Specific rotation: [alpha] D0 (c=05, in DMSO); elemental snalysis: C 4944%, H419%, N 1796%, S 795%; mp: does not show clear melting point up to 300 degC; color reaction: negative to ninhydrin reaction and anthrone reaction, and positive to biuret reaction; solubility: easily soluble in CH3OH CHCl3 mixed solution and C2H5 OH CHCl3 mixed soution, soluble in pyridine, concentrated hydrochloric acid, etc, slightly soluble in CHCl3, etc, and insoluble in CH3OH, etc; etc USE:Antibiotic Active against Gram-positive bacteria, particularly acid-fast bacteria such as resistant bacteria and tuberculous bacilli PROCESS:Actionplanes japanencis subspecies japanencis 221-2 (FERM-P NO4464), etc is cultured, and antibiotic AB-102 is separated from a cultured substance and purified

Method for visualizing gas flow in soil

Abstract: PROBLEM TO BE SOLVED: To visualize a flow of a gas in soil by injecting the gas in the soil by adding a coloration reagent and color identifying it SOLUTION: As a coloration reagent, a reagent which is colorless in an initial state but brings about a color reaction when a specific gas is applied, a hydrogen ion concentration reagent which color identifies in an initial state but becomes another color or colorless by a specific gas or the like is used Soil 3 obtained by mixing cement suspension supernatant colored with red by a phenol phthalein of a coloration reagent with cement mixed fine sand is contained in a transparent acrylic column 1, a pressure reducing valve 8 is regulated, and a carbonic acid gas is sent from a gas cylinder 9 into the soil 3 while holding a flow rate of a flowmeter 6 constant After the gas is sent, the soil 3 is urged out from the column 1, sliced at about each 5 cm, and its section is observed Then, though the soil 3 before the gas is sent is red by the phenol phthalein, but after the gas is fed, a part brought into contact with the carbonic acid gas becomes colorless by a neutralization Accordingly, a flowing state of the gas is observed from its color erasing state

Array using color reaction of chemical compounds

Abstract: Disclosed herein is an array, including a plurality of sensing units, each of which contains a mixture of porphyrin compounds, and which are arranged in a predetermined pattern. The array is advantageous in that it is possible to qualitatively analyze various mixture samples without performing complicated processes of separation and analysis.