1051 Résultats pour : "SIGMA ALDRICH MICROSCOPY"

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Chrysoidine G,for microscopy (Bact., Bot., Vit.) (4-Phenylazo-m-phenylenediamine monohydrochloride; Basic Orange 2; Chrysoidine Y).

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Sulforhodamine 101 acid chloride has been used in an encapsulated fluorescent probe as a model drug to study drug-delivery properties of rhamnogalacturonan-I based microcapsules. It has also been used in confocal imaging as an astrocyte specific dye.

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1,1,2-Trimethyl-3-(4-sulfobutyl)benz[e]indolium, inner salt, Dye content 90 % (1,1,2-Trimethyl-3-(4-sulfobutyl)-1H-benz[e]indolium hydroxide, inner salt; 1-(4-Sulfobutyl)-2,3,3-trimethyl-4,5-benzindolium, inner salt)

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Quinoline Yellow,for microscopy (Hist.), mixture of mono- and disulfonic acid sodium salt (Acid Yellow 3)

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A dual-emission potential-sensitive probe that can be used to measure mitochondrial membrane potential. JC-1 is a green-fluorescent (λex 520 nm) monomer at low membrane potential. At higher potentials, JC-1 forms red-fluorescent (λem 596 nm ) "J-aggregates," which exhibit broad excitation and very narrow emission spectra. The ratio of red to green fluorescence of JC-1 is dependent only on membrane potential, and not influenced by mitochondrial size, shape, or density.

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N,N-Dimethyl-p-phenylenediamine dihydrochloride (DMPD) has been used in the HID-AB (high iron diamine-alcian blue) staining of intestinal tract samples. N,N-Dimethyl-p-phenylenediamine dihydrochloride (DMPD) is used for the determination of peroxidase. DMPD is converted into a red pigment of semiquinone nature. It is also used in the HID-AB (high iron diamine-alcian blue) staining procedures, which are used to differentiate between sialomucin and sulfomucin in the gastrointestinal tract.

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Melanin is a ubiquitous and prominent pigment responsible for color of skin, hair and eyes. Melanin is classified into eumelanin and pheomelanin. Eumelanin is black to dark brown pigment and is present in black hair and retina of the eye. Pheomelanin is yellow to reddish brown pigment present is red hair and red feathers. Melanins are high molecular weight pigments synthesised from phenolic or indolic precursors and is widely present in animals, plants and microorganisms.

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Kit component in the silver stain kit.

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Acid Fuchsin is mainly used as a diachrome and is part of the connective tissue stains. It also works as a pH indicator.

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4-Amino-3-hydroxy-1-naphthalenesulfonic acid is a derivative of aniline consisting of a trifunctional monomer (bearing three functional groups –NH₂, –OH and –SO₃H). It also contains two fused benzene rings.

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Methyl Blue is a triaminotriphenylmethane dye, widely used in paper, textile and leather production.

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Bromobimane is also known as monobromobimane. It is also a known probe for thiols and is a fluorescent reagent activated upon a photolysis reaction.

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General purpose nuclear stain, regressive type. Used with hematoxylin and eosin staining.

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Haematoxylin

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Fluorescein 95% (dye content), Sigma-Aldrich®

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Azure B eosinate, Sigma-Aldrich®

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1,2,3,3-Tetramethyl-3H-indolium iodide,98%

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10% Neutral buffered formalin (NBF) is the most commonly used fixative for light microscopy. 10% NBF is well suited for large throughput laboratories and requires a relatively short period of fixation, but can also be used for the long-term storage of tissue. Formalin fixation is thought to form between the aldehydes and the proteins, creating a gel, thus retaining cellular constituents in their in vivo relationship.

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Orange G, Sigma-Aldrich®

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May contain minor quantities of precipitated dye.

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Chromeazurol B is a dye, belonging to the class of triphenylmethanes.

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Acriflavine also interacts with HIF-1α (hypoxia-inducible factor 1 α) and HIF-2α, and thereby suppresses dimer formation of HIF-1 and transcriptional function. It also has negative effect on tumor growth and vascularization. Acriflavine also exhibits trypanocidal, antibacterial and antiviral activities.

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General purpose cytoplasmic counterstain. Used with hematoxylin and eosin staining.

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Ponceau Xylidine has been used as part of the Goldner’s trichome stain to stain thin sections. It has also been used to prepare Fuchsin-Ponceau solution to stain an amyotrophic lateral sclerosis tissue-engineered

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Variamine Blue RT Salt has been used as a dye in ultraviolet-visible spectrophotometric method based-uricase enzyme for the detection of uric acid in normal urine. It is also used in combination with naphthol AS-MX phosphate-variam to determine the cytochemical visualization of alkaline phosphatase activity.

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Methyl green zinc chloride salt, Sigma-Aldrich®

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Tissues are stained for Gram-positive organisms with crystal violet, mordanted in iodine, decolorized, stained for Gram-negative organisms with safranin O and then counterstained with tartrazine. For delineating Gram-positive and Gram-negative organisms

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Intended for use with Carbol Fuchsin (HT80-1) in Sigma Acid Fast Stain, Procedure HT80. Acts as both a counterstain and a differentiator.

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Intended for use in the Acid Fast Stain, Procedure No. HT80 with Malachite Green counterstain Catalog No. HT80-2

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4-Nitrophthalamide,99%