1070 Risultati per: "SIGMA ALDRICH MICROSCOPY"

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Useful for quantitating biotin binding sites. This reagent binds to avidin more quickly than conventional fluorescein biotin.

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Thymol meets analytical specification of Ph. Eur., BP, NF, 99 to 101%.

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Lugol′s solution is a ready-to-use solution that comprises 6% iodine in 4% potassium iodide. It is commonly used as a mordant for Gram staining in bacteriology. It is used for staining bacterial target structures for diagnostic purposes by fixing, staining, counterstaining, and mounting bacteriological specimen materials.

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Differentiation solution comprises acidified ethanol or isopropanol that is used to decolourise hematoxylin stain. The duration of exposure to the solution determines the degree of decolourisation. Differentiation is a crucial step in hematoxylin-eosin staining to achieve the proper colour contrast necessary for visualisation, by selectively removing excess hematoxylin from the tissue section and leaving behind the desired staining intensity.

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Adrenochrome has been used to study the effect of adrenochrome on coronary artery constriction in the rat heart.

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Indophenol is used in hair dyes, redox materials, lubricants, liquid crystal displays, biosensor and fuel cells. It is toxic to fishes and is implicated in environmental pollution. Indophenol method is common for the determination of ammonia. The reaction gives a blue product, which is measured spectrophotometrically.

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For use in inhibiting α-naphthyl acetate reaction on monocytes. Optional reagent in Sigma Esterase Procedure 91A.

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Regular Paraplast with approx. 0,8% DMSO added for enhanced ease of infiltration and sectioning. Paraffin polyisobutylene mixture is a tissue embedding medium composed of highly purified paraffin and polyisobutylene and a low level of dimethyl sulfoxide (DMSO) to enhance the rate of tissue penetration. Paraffin-polyisobutylene (76258) supports thin wrinkle-free sectioning down to 4 µm with more flexible and continuous ribbons.

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Silver nitrate along with iodine are among several inorganic substances used to induce colour in microscopical preparations. Silver nitrate as a biological stain exploits the strong colors of colloidal metallic silver. Silver nitrate is an important component of the silver staining that is used for the detection of proteins separated by polyacrylamide gel electrophoresis. Silver nitrate is a component of the silver stain kit. It is required for image development in diamine as well as non-diamine silver staining.

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Brilliant Green is a dye and an antiseptic agent.

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Resazurina sale sodico, Sigma-Aldrich®

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Sudan Red 7B has been used to stain the fat bodies of Ostrinia nubilalis (Hübner) larvae. Sudan red 7B, also known as fat red, is a non-fluorescent stain.[2] It is effectively used to stain lipids and is used to indicate the presence of suberin in cell walls.[2][3][4] Sudan red 7B acts as a marker for formosan subterranean termite, Coptotermes fornosanus Shiraki.

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Solution 2% in amyl acetate (Cellulose nitrate).

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Rose Bengal lactone 95%, Sigma-Aldrich®

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Methyl blue (C.l. 42780) is a triaminotriphenylmethane dye with each amino group carrying a monosulfonated phenyl substituent. It is also known as Water blue, Acid blue 93, Cotton blue, Poirriers blue, and Aniline blue water soluble.

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Sulfobromophthalein disodium salt hydrate has been used as a positive control to study the interaction of 11-keto-β-boswellic acid (KBA) and 3-acetyl-11-keto-β-boswellic acid (AKBA) with organic anion transporter OATP1B3.

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3,4-Pyridinedicarboxamide,98% (Cinchomeronamide)

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Orceina, Sigma-Aldrich®

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Fluorescein isothiocyanate (FITC) 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 used for the staining of conidia.
Reagent for the FITC labeling of proteins; Microsequencing of proteins and peptides (HPLC).

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Fast black K (C.l. 37190) is a lipophilic amino-substituted monoazo dye. It is also known as Brentamine fast black K salt.

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Used in electrophoresis and as a hapten carrier. Most commonly used to prepare density gradients. A nonionic synthetic polymer of sucrose.

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NLO material.

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Tris(4-nitrophenyl)amine, grado tecnico, Sigma-Aldrich®

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

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Primuline, also known as direct yellow 59 or primuline yellow, is considered to be a more sensitive and non-destructive dye for lipids.

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Solvent Blue 59, Dye content 98 % (1,4-Bis(ethylamino)-9,10-anthraquinone; Atlasol Blue 2N; Sudan Blue)

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It has been used in synthesis and characterization of Fe-doped aluminosilicate nanotubes with electron conductive properties.

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Ozone-scavenging reagent that reacts rapidly with ozone. Potassium indigotrisulfonate has been used: In colorimetric method of measurement of atmospheric ozone, for measuring residual aqueous ozone by gas diffusion flow injection analysis, to determine O₃ concentration in water.

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3,3'-Diethyloxadicarbocyanine iodide (DODC) ≥99%, Sigma-Aldrich®

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Hanks' Balanced Salt solution,10 x, Modified, without calcium, magnesium or sodium bicarbonate