1073 Results for: "SIGMA ALDRICH MICROSCOPY"

Supplier: SIGMA ALDRICH MICROSCOPY

Phenol Red sodium salt is widely used as a pH indicator. At a pH of 6,4 and below, phenol red solution will have a yellow colour. At a pH of 8,2 and above, it will have a red colour. It is commonly used in culture media to detect neutral to acidic pH changes.

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Tetrazolium Violet is a monotetrazolium salt which forms water-insoluble formazans. These salts are mainly used as indicators of extracellular redox activity and cell redox potential. Tetrazolium violet is positively charged and cell-permeable.

Supplier: SIGMA ALDRICH MICROSCOPY

Fluoroshield™ is an aqueous mounting medium for preserving fluorescence of tissue and cell smears.

Supplier: SIGMA ALDRICH MICROSCOPY

2-(3-Nitrophenylsulfonyl)ethanol,97%

Supplier: SIGMA ALDRICH MICROSCOPY

Sudan IV is a hydrophobic azo dye. It stains triglycerides and imparts an intense red colour. The dye does not stain lipid droplets or phospholipids. It is also used a diagnostic assay manufacturing, hematology, histology.

Supplier: SIGMA ALDRICH MICROSCOPY

o-Tolidine is a diacidic dye which is sparingly soluble in water and easily soluble in ether and alcohol. On exposure to chlorine or bromine vapors, it forms an intense blue color. This forms the basis for detection of chlorine, nitrates and hydrogen peroxide in air or water. It turns yellow on reacting with free chlorine. o-Tolidine easily forms acid salts.

Supplier: SIGMA ALDRICH MICROSCOPY

To be used with SIAL 69571 Ren HY 956 (Hardener for Epoxy Embedding Medium)

Supplier: SIGMA ALDRICH MICROSCOPY

to be used with SIAL 78711 RenLam M-1 (Epoxy Embedding Medium)

Supplier: SIGMA ALDRICH MICROSCOPY

Gram’s crystal violet solution, also known as gentian violet or hexamethyl pararosaniline, is a basic, cationic, acidotropic aminoarylmethane dye. It is a hexa-N-methylated triaminotriphenylmethane with a moderately sized lipophilic cation and a slightly nonplanar conjugated system. It is used in bacteriology as the primary stain in Gram staining to differentiate Gram-positive and Gram-negative bacteria. It is known to possess antibacterial and antifungal properties.

Supplier: SIGMA ALDRICH MICROSCOPY

Bromophenol blue has been used in the sample buffer prepared for western blotting. A tracking dye for nucleic acid or protein electrophoresis in agarose or polyacrylamide gels.

Supplier: SIGMA ALDRICH MICROSCOPY

Chromeazurol S has been used to evaluate siderophore production by rhizosphere bacteria.

Supplier: SIGMA ALDRICH MICROSCOPY

Quinaldine red has been used as a fluorescent probe for α1-acid glycoprotein (AAG). It is also used a diagnostic assay manufacturing, hematology, histology.

Supplier: SIGMA ALDRICH MICROSCOPY

Fluoresceinamine, isomer I has been used as a probe in immobilization and is used to determine its ability to potentiate the antiviral activity of poly r (A-U).

Supplier: SIGMA ALDRICH MICROSCOPY

Certified for use as a constituent of MacNeal′s tetrachrome stain for blood.

Supplier: SIGMA ALDRICH MICROSCOPY

Kit is used to demonstrate acid phosphatase and tartrate resistant acid phosphatase (TRAP) in blood, bone marrow and tissue touch preparations.

Supplier: SIGMA ALDRICH MICROSCOPY

Naphthol AS-BI Phosphoric acid solution for use in the Sigma Acid Phosphatase (TRAP) Procedure, Kit 387A.

Supplier: SIGMA ALDRICH MICROSCOPY

Rose Bengal has been used to evaluate acrosome integrity. It has also been used to initiate photothrombotic occlusion in blood.

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Direct Red 80 (C.I. 35780) is an extremely hydrophilic, very large tetrakisazo hexasulfonated anionic dye that has a large, planar aromatic system.It is also known as Sirius red F3B, chlorantine fast red 7BLN or 5BRL, durazol brilliant red B, pontamine fast red 7BNL, and sirius fast red.

Supplier: SIGMA ALDRICH MICROSCOPY

Loefflers Methylene Blue stain is used for the identification of diphteria bacilli, since it differentiates the deeply staining metachromatic granules from the pale blue-staining cytoplasm.

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Gentian violet is used in the Gram staining for distinguishing between gram-positive and gram-negative organisms.

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Epoxy embedding medium, hardener DDSA

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Eosin B for microscopy, Sigma-Aldrich®

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Allura Red AC is a food azo dye. It is a dark red powder or granules, that is soluble in water and insoluble in ethanol. Allura Red AC has been used: for the determination of fecal neutral sterols (FNS) in mice, to evaluate its developmental toxicity, as a coloring reagent for observing the experimental performance of liquid-handling robot.

Supplier: SIGMA ALDRICH MICROSCOPY

Bromothymol blue sodium salt 0.04% in aqueous solution, Sigma-Aldrich®

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Acridine orange is a metachromatic dye which can stain DNA, RNA and acid glycosaminoglycans. At low concentrations, it intercalates into DNA and precipitates RNA. However, at high concentrations it denatures and precipitates both RNA and DNA. Acridine orange is also used to analyse autophagy. It enters into acidic organelles in a pH-dependent manner. At neutral pH, acridine orange gives a green fluorescence and in acidic conditions, it accumulates in acidic organelles giving a bright red fluorescence.

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Eosin Y, also known as Eosin yellowish is a widely used xanthene dye. It is a counterstain that is used to distinguish between various connective tissue fibers and matrices, and the cytoplasm of different types of cells. Eosin in combination with hematoxylin is useful to demonstrate the general histological architecture of a tissue.

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Phenolphthalein is an acid base indicator. It is a weak acid, which is colorless in acidic solution and turns puce pink in alkaline solution. Phenolphthalein is genotoxic. It might cause oxidative damage and binds to estrogen receptors. Phenolphthalein solution is a synthetic indicator. It is colorless in acidic and neutral conditions. Phenolphthalein gives pink color when added to a base, therefore it is considered as a base indicator.

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Methyl orange (C.I. 13025) is the sodium salt of p-dimethylaminoazobenzenesulfonic acid. It is an orange-colored synthetic dye, which changes color depending on the pH of the solution. It develops a red color in acidic solution and yellow color in basic solution.

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Wright stain, a modified romanowsky stain, is intended for differential staining of the cellular elements of blood. It comprises polychrome methylene blue and eosin B. Upon staining blood films with wright stain, the white blood cell nucleus and cytoplasm display characteristic blue or pink hues.

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Sudan I is a lysochrome, a diazo-conjugate dye, used as an industrial dye, added to products such as waxes, oils, petrol, solvents and polishes. Sudan I is a category three carcinogen previously, now banned, used to colour certain foodstuffs. It can be used as a diagnostic assay manufacturing, hematology, histology.