1057 Ergebnisse für: "SIGMA ALDRICH MICROSCOPY"

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Reagent for aluminium. Aurintricarboxylic acid readily polymerises in aqueous solution, forming a stable free radical that inhibits protein-nucleic acid interactions. It is a potent inhibitor of ribonuclease and topoisomerase II by preventing the binding of the nucleic acid to the enzyme. It stimulates tyrosine phosphorylation processes including the Jak2/STAT5 pathway in NB2 lymphoma cells, ErbB4 in neuroblastoma cells, and MAP kinases, Shc proteins, phosphatidylinositide 3-kinase and phospholipase C in PC12 cells. Aurintricarboxylic acid inhibits apoptosis in many cell types. Its neuroprotective effect, perhaps due to its ability to prevent down-regulation of Ca²⁺ impermeable GluR2 receptors or to its ability to inhibit calpain, a Ca²⁺-activated protease that is activated during apoptosis.

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Alizarin has been used as a biological stain to dye cotton fabrics and is used as standard in UV-visible spectrophotometer.

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Thymol is generally added in the Hematoxylin and Eosin staining solution to prevent mould growth. It is also suitable for use in antimicrobial screening by the disk diffusion method. It has been used as a test compound in antifungal assay to assess the susceptibility of various fungal isolates.

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Formalin solution, neutral buffered, 10% may be used as a reagent for the primary fixation of tissues for diagnostic applications of an immunoperoxidase method in hematopathology.

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

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Giemsa's Azur-Eosin-Methylenblau, Sigma-Aldrich®

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Useful for staining fresh, fixed, unembedded or plastic-embedded sections of bone. Villanueva osteochrome bone stain gives uniform and reproducible results. Useful in studying biopsy or postmortem tissue.

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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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Used to demonstrate polymorphonuclear cells in blood or bone marrow films. Each kit has sufficient reagents for 10 uses.

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For use with Sigma kit 86R, for the demonstration of alkaline phosphatase in granulocytes. The procedure is often referred to as the LAP procedure.

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Bouin's solution is an excellent fixative for preserving soft and delicate structures. It is prepared with saturated picric acid, formaldehyde and acetic acid.

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Nuclear counterstain. Included as a component in the Sigma Fetal Hemoglobin Procedure 285.

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Naphthol AS-phosphat ≥99% (durch TLC) für die Histologie, Sigma-Aldrich®

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Naphthol AS-MX phosphate disodium salt,phosphatase substrate

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Intended for use in Sigma Procedure 387 for the demonstration of Acid Phosphatase (TRAP).

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

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Intended for use in the study of connective tissue, muscle and collagen fibers. Stains collagen blue and muscle red.

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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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Ethylene glycol-bis(succinic acid N-hydroxysuccinimide ester) has been used as a cross-linking agent.

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Hämatoxylin, Sigma-Aldrich®

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Naphthol AS-MX-phosphat, Sigma-Aldrich®

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Sodium diatrizoate hydrate has been used in spore purification. It has also been used in the isolation of plasma lymphocytes, monocytes, and dendritic cells. Sodium diatrizoate is also suitable as a density gradient reagent in blood cell separation. It has also been utilised as a radiological contrast agent.

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NLO material.

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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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1,2-Dichloro-4,5-dinitrobenzene,98%

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Methyl green is a synthetic, triphenylmethane-type cationic dye related to ethyl green mainly used as DNA stain in histochemistry. It possesses aniline rings with different degrees of methylation. The dye binds specifically to the A-T rich regions of the major groove of DNA with the help of two positive charges. Methyl green in combination with pyronin is extensively used to stain RNA and plasma cells in tissue sections and cytologic preparations.

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4-Nitrophthalonitril 99%, Sigma-Aldrich®

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Fluoromount™ Aqueous Mounting Medium for use with fluorescent dye-stained tissue.

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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 is water soluble and has a low affinity for cellular material, so vegetative cells may be decolorized with water. Ve

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