145 results about "Neutral red stain" patented technology

The invention discloses a preparation method of a white-rot fungus mycelium biological adsorbent and a use of the white-rot fungus mycelium biological adsorbent in synthetic dye waste water. The preparation method comprises the following steps of inoculating a liquid medium with a white-rot fungus strain suspension, carrying out culture, acquiring mycelium, orderly carrying out centrifugation, washing and drying treatment, and then carrying out crushing or crushing modification treatment to obtain the white-rot fungus mycelium biological adsorbent. The preparation method has simple processes and a low cost. The white-rot fungus mycelium biological adsorbent is biodegradable and does not produce secondary pollution. A capacity of saturated adsorption of heterocyclic dye neutral red in heterocyclic dye neutral red model wastewater is 49.02mg / g or more, and the highest saturated adsorption capacity of the mycelium biological adsorbent subjected to aminated modification treatment is 91.74mg / g.

The invention provides a conjugate of a polymer and a biological stain and a preparation method and application of the conjugate. The conjugate has the formula G-X-B, wherein the polymer G is selected from the group consisting of glucans, fructosans, polymannuronic acid, polyguluronic acid, heteropolysaccharides, mono- or hetero-polysaccharides, mono- or hetero-polyuronic acid polysaccharides, mono- or hetero-polyuronic acid sulfate esters, hydrophilic alcohol high polymers, polylysine, polyglutamic acid and polyaspartic acid; the linking group X is a C1-C10 organic group; and the biological stain or a derivative B thereof may be toluidine blue, methylene blue, Evans blue, neutral red, Janus green or bright cresol purple. The conjugate can stain bilateral neck and submaxillary or submental lymphatic vessels and lymph nodes in New Zealand white rabbits by indirect lymph staining method, without diffusion in tongue body. No obvious toxic and adverse effects appear in all experimental animals in each group, and no obvious pathological changes appear in histological examination of internal organs.

The invention discloses a preparation method and application of a ratio type fluorescent carbon dot for detecting sertraline and glutathione, belongs to the field of fluorescent carbon dots, and aimsto provide a preparation method and application of a ratio type fluorescent carbon dot with a specific recognition effect on sertraline and glutathione. The method comprises following steps: dissolving neutral red and polyethyleneimine in secondary water, carrying out ultrasonic treatment to obtain a uniform mixed solution, transferring the uniform mixed solution into a hydrothermal reaction kettle, reacting for 4-8 hours at the temperature of 150-200 DEG C, standing and cooling the reaction product to room temperature after the reaction is stopped, centrifuging the liquid to remove insolublesubstances, collecting a supernatant, and carrying out dialysis treatment in a glass container for at least three days by virtue of a dialysis bag being 500-1000 Da, so as to obtain a pure carbon dotaqueous solution; and performing freeze drying to obtain the orange red fluorescence emission carbon dots. The prepared ratio type fluorescent carbon dot has a specific recognition effect on sertraline and glutathione, wherein the fluorescence of the carbon dot shows orange-green-orange reversible transformation, and the ratio type fluorescent carbon dot is used for detecting sertraline and glutathione and is good in selectivity and high in sensitivity.

Electrodes and configurations for electrochemical bioreactor systems that can use electrical energy as a source of reducing power in fermentation or enzymatic reactions and that can use electron mediators and a biocatalyst, such as cells or enzymes, to produce electricity are disclosed. Example electrodes in the system may comprise: (1) neutral red covalently bound to graphite felt; (2) a carboxylated cellulose bound to the graphite felt, neutral red bound to the carboxylated cellulose, NAD+ bound to the graphite felt, and an oxidoreductase (e.g., fumarate reductase) bound to the graphite felt; or (3) a metal ion electron mediator bound to graphite. Various biocatalysts, such as an oxidoreductase, cells of Actinobacillus succinogenes, cells of Escherichia coli, and sewage sludge, are suitable for use in the electrochemical bioreactor system.