1051 Résultats pour : "SIGMA ALDRICH MICROSCOPY"

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Trypan Blue (C.l. 23850) is a large, tetrasulfonated anionic, hydrophilic dye. It is also known as diamine blue 3B. Trypan blue has been used as a dye in trypan blue exclusion assay/cell viability assay to detect dead cells.

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Proflavine is a small, amphipathic, acridine-derived fluorescent dye.Proflavine hemisulfate is used as a rapid stain for cytological studies of biological specimens. It stains cytoplasmic structures and nuclei. Proflavine has the capability to intercalate double stranded DNA.

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Oil Red EGN has been used to stain lipid droplets accumulated in cell during adipogenesis.

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Silver stain is an aid in distinguishing fungi, basement membrane and opportunistic organisms such as Pneumocystis carinii in tissue sections or smears.

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Nigrosin,certified by the Biological Stain Commission (Acid black 2; Nigrosin water soluble).

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Osmium tetroxide (OsO₄) is a heavy tetrahedral, symmetrical molecule composed of osmium, a third-row transition metal. Osmium tetroxide is both a dye, and a non-coagulant fixative agent in electron microscopy primarily used for the examination of biological tissue components in the histopathology laboratory. Specimens are postfixed with osmium testroxide to ensure preservation of the lipids.

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Phycobiliprotein exhibiting exceptional absorbance and fluorescence characteristics due to a lack of susceptibility to internal and external fluorescence quenching. Ideal for highly sensitive studies in flow cytometry and immunoassays.

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Vert brillant ≥90% (teneur en colorant), certifié par la Commission de coloration biologique, Sigma-Aldrich®

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Suitable for titration of morpholine

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10-(2',4'-Dinitrophenylazo)-9-phenanthrol, (DNAF)

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Anthrone, also known as 9(10H)-Anthracenone, is a planar tricyclic aromatic ketone. In acidic conditions, anthrone reacts with carbohydrate to yield a blue-green colour.

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For use with Osteo-bed bone embedding kit. Solvent for removal of plastic from sections prior to rehydration and staining. Most histochemical and immunohistochemistry staining protocols require the removal of methyl methacrylate (MMA) and rehydration of mounted sections for improved stain penetration and greater contrast.

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2,7,12,17-Tetra-tert-butyl-5,10,15,20-tetraaza-21H,23H-porphine has been used in multifunctional drug delivery investigations from ionic triblock terpolymer micelles.

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Acid Phosphatase, Lymphocyte Kit, Sigma-Aldrich®

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Chief ingredient of Giemsa Stain.

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Auramine O, Sigma-Aldrich®

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Acridine is a small cationic and planar dye that mainly binds to RNA and DNA. These dyes are strongly fluorescent. It resembles the structure of xanthene except that the heteroatom is nitrogen, not oxygen. Acridine is suitable for nucleic acid staining, particularly for cell cycle determination. Acridines are used as fluorescent materials for visualisation of biomolecules, and in laser technologies.

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Alcian Blue solution has been used in the histological staining of acidic glycosaminoglycans (GAGs; mucopolysaccharides) that are carboxylated or sulfated. Sulfated glycosaminoglycans appear to be the preferred substrate for alcian blue at pH 2.5. Alcian blue has been used to stain hyaluronan (HA), a nonsulfated GAG, but the intensity of the staining of HA is affected by the method of tissue fixation used. Alcian blue staining of GAGs in tissue may be modified through the addition of an electrolyte such as magnesium chloride.

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Toluidine blue (C.l. 52040) is a diaminothiazine dye. It is also known as TBO, tolonium chloride, and toluidine blue O.

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4-(4-Isothiocyanatophenylazo)-N,N-dimethylaniline,97% (4-(Dimethylamino)azobenzene-4'-isothiocyanate; DABITC)

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Metachromatic dye

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Dihydrogéno(éthyl)[4-[4-[éthyl(3-sulfonatobenzyl)amino](4-hydroxy-2-sulfonatobenzhydrylidène]cyclohexa-2,5-diène-1-ylidène](3-sulfonatobenzyl)ammonium, sel de disodium, Sigma-Aldrich®

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Violet cristallisé, Sigma-Aldrich®

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DNA, RNA stain with advantageous spectral properties for cytometric applications.

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Intended for use in the Leukocyte Acid Phosphatase procedure, procedure No. 386 or 387

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Crystal Violet lactone, Dye content 97%.

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Yellow counterstain suitable for a wide range of histological staining procedures.

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Methylene blue, Neisser formulation. Well developed granules of volutin (polyphosphate) may be seen in unstained wet preparations as round refractive bodies within the bacterial cytoplasm. With methylene blue they stain metachromatically, a reddish purple color.

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Substrate for the histochemical demonstration of acid and alkaline phosphatase. Substrate for the fluorometric assay of acid and alkaline phosphatases. Demonstration of acid phosphatase in paraffin embedded tissue. Cytofluorometric assay of acid phosphatase in single living cells.

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Orange G solution, alcoholic, for the colorimetric method according to Papanicolaou (OG-6)