1051 Résultats pour : "SIGMA ALDRICH MICROSCOPY"

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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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Fast Garnet GBC base has been used as a stain in papain activity inhibition assay, to stain for tryptase-activity and chymase-like activity, to gel stain for esterolytic activity.

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Pyrocatechol Violet (PV) is a sulfone phthalein dye. It chelates metal ions. The metal-PV complex is bluish-violet in colour.

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4-tert-Butylphthalic anhydride has been used to synthesise novel yellow quinophthalone dyes for LCD colour filters.

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Inhibits mitochondrial Ca2+ uniporter; capsaicin antagonist; blocks VR1 vanilloid receptor-coupled ion channels.

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Sulforhodamine B has been used as a dye in the MCF-7 (human breast adenocarcinoma cell line) cell proliferation assay.

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p-Coumaric acid has been used as a component of chemiluminescent substrate for protein detection in western blotting.

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Ethidium homodimer is a red fluorescent dye. It cannot cross an intact plasma membrane, but can easily pass through a damaged plasma membrane. Ethidium homodimer is used to check membrane integrity. One molecule of EthD-1 will non-selectively bind four base pairs in dsDNA.

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Nuclear Fast Red is suitable for the determination of calcium. It is suitable for use in prussian blue staining in neural progenitor cells. It may be employed as highly sensitive 'off/on' fluorescent probe for the determination of guanine. Nuclear fast red (2-anthracenesulfonic acid, 4-amino-9,10-dihydro-1,3-dihydroxy-9,10-dioxo-, monosodium salt) may be used as selective complexing agent for the simultaneous determination of copper and bismuth by adsorptive stripping voltammetry.

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Indicator for organolithium assay.

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2-(Ethylthio)benzothiazole,97%

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4',5'-Dibromofluorescein, Dye content 95 % (Solvent Red 72)

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Procion Red has been used in the visualization of osteocyte canalicular system. It has been used as an adsorbate in the biosorption by Bacillus subtilis.

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Nuclear fast red dye has anthraquinonic nature and is used either alone or in combination with other dyes. It is mainly used for staining of nuclei.

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Bleu de bromochlorophénol 95% (teneur en colorant), Sigma-Aldrich®

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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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In Schaeffer-Fulton`s method, a primary stain-malachite green is forced into the spore by steaming the bacterial emulsion. Malachite green (Schaeffer & Fulton`s Spore Stain A: Cat. No. 90903) is water soluble and has a low affinity for cellular material, so vegetative cells may be decolorized with water. Vegetative cells are then counterstained with safarin. The components and the method are also available as kit (Cat. No. 04551).
Schaeffer & Fulton`s Spore Stain B: SafarinO 5 g/l in water

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Erythrosin B, also called as eosin B, is a xanthene dye. It belongs to the family of fluorescein dyes. It plays a major role in inhibiting dopamine uptake and high affinity 3H-ouabain binding and ion transport in synaptosomes from rat caudate nucleus. Erythrosin B has been used as a dye in fluorescence lifetime imaging.

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Azobenzène 98%, Sigma-Aldrich®

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Fluorescein isothiocyanate (FITC) is yellow-orange in color with an absorption maximum at 495nm. Upon excitation, it emits a yellow-green color with an emission maximum at 525 nm. It is widely used to attach a fluorescent label to proteins via the amine group. The isothiocyanate group reacts with amino terminal and primary amines in proteins. It has been used for the labeling of proteins including antibodies and lectins. Fluorescein isothiocyanate isomer I has been proposed as a contact sensitiser.

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Toluidine Blue O (TBO) is a thiazine dye of the quinone-imine family and is cationic in nature. It has been employed in polychromatic staining of paraffin embedded plant cell walls. It is a metachromatic dye suitable for a wide variety of histological staining procedures. A metachromatic dye suitable for a wide variety of histological staining procedures. Toluidine Blue O has been used to stain a variety of specimens like mesenchymal cells, taste buds, osteoblasts, matrix, and more.

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May be substituted for hematoxylin in hematoxylin and eosin procedures.

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Xylidyl blue I, (4-Hydroxy-3-[2-hydroxy-3-(2,4-dimethylphenylaminocarbonyl)-1-naphthylazobenzenesulfonic acid sodium salt; Magonsulfonate)

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Chlorure de 3-methylamino-7-dimethylaminophénothiazine-5-ium ≥89% (teneur en colorant), certifié par la Commission de coloration biologique, Sigma-Aldrich®

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The polycyclic aromatic hydrocarbon perylene is a hydrophobic fluorescent probe. It is highly photostable and displays blue fluorescence. Perylene is used as a dye for spectroscopic studies.

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2-(5-Bromo-2-pyridylazo)-5-(diethylamino)phenol,97% (Bromo-PADAP).

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Building block for 'Anti-Bredt' strained molecules.

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Disperse Blue 134, for microscopy (1,4-Bis(isopropylamino)anthraquinone; Solvent Blue 36).

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trans-4-Stilbenemethanol

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Phenazine ethosulfate is a cationic dye and a chemical electron acceptor. It is used in dye-linked enzyme assays. At a high pH, the dye produces free radicals, which may be the actual electron acceptors.