1070 Risultati per: "SIGMA ALDRICH MICROSCOPY"

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Protargol silver impregnation and neuronal selectivity for light and electron microscopic observations.

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o-Tolidine is a diacidic dye which is sparingly soluble in water and easily soluble in ether and alcohol. On exposure to chlorine or bromine vapors, it forms an intense blue color. This forms the basis for detection of chlorine, nitrates and hydrogen peroxide in air or water. It turns yellow on reacting with free chlorine. o-Tolidine easily forms acid salts.

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Loefflers Methylene Blue stain is used for the identification of diphteria bacilli, since it differentiates the deeply staining metachromatic granules from the pale blue-staining cytoplasm.

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Produces highly insoluble dark green stain in histochemical studies.

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Percoll® is a classic medium for density gradient centrifugation of cells, viruses, and subcellular particles. It consists of colloidal silica particles of 15 – 30 nm diameter (23% w/w in water), coated with polyvinylpyrrolidone (PVP).

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Azure A eosinate, powder, crystals or chunks, Sigma-Aldrich®

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2-Amino-5,6-dimethylbenzimidazole, Sigma-Aldrich®

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Gram’s crystal violet solution, also known as gentian violet or hexamethyl pararosaniline, is a basic, cationic, acidotropic aminoarylmethane dye. It is a hexa-N-methylated triaminotriphenylmethane with a moderately sized lipophilic cation and a slightly nonplanar conjugated system. It is used in bacteriology as the primary stain in Gram staining to differentiate Gram-positive and Gram-negative bacteria. It is known to possess antibacterial and antifungal properties.

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Nile blue chloride has been used to stain non-aqueous phase in fluorescence microscopy studies.

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

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Reactive Black 5 (RB5) has been: used in an optimization study on the photocatalytic degradation of RB5 dye in synthetic greywater effluent (i.e. aqueous RB5 in distilled water), in order to understand the effects of different photoreactor parameters on the degradation kinetics. As a textile dye to investigate the anaerobic reduction in upflow stirred packed-bed reactors (USPBRs) with biological activated carbon (BAC) system. Used in the performance evaluation of dye removal forlarge molecule substance.

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Papanicolaou stain imparts a characteristic range of coloration to exfoliative cells of vaginal, cervical, prostatic and other body secretions, allowing critical examination of nuclei and cytoplasmic components.

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Intended for use in the silver stain (modified GMS) procedure.

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Methyl violet for microscopy (Bact., Bot., Hist.), indicator (pH 0.1 - 2.0), mixture of polymethylated pararosaniline hydrochlorides.

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Carmine is a red compound and is generally used with aluminum, iron and other metal salts to enhance its activity. During smear preparation, it is required for chromatin staining in fresh material. In presence of aluminum chloride, it is used for the staining of glycogen.

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Used as a red nuclear counterstain in various cytochemical procedures.

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Quinoline Yellow, Mixture of the mono- and disulfonic acids of Quinoline Yellow (Acid Yellow 3)

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Cell impermeable fluorescent probe for Ca2+.

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Solvent Blue 38 is a phthalocyanine stain, used for staining myelin, neurons and glial fibres.

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Acridine Orange base (3,6-Bis(dimethylamino)acridine) is a cell-permeable fluorescent dye that binds to nucleic acids. It emits green fluorescence when bound to dsDNA and red fluorescence when bound to ssDNA or RNA. It is also known to be a positive solvatochromic dye. Acridine orange has also been used as a lysosomal dye. It is widely used to detect the presence of homeopathic potencies.

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Rose Bengal has been used to evaluate acrosome integrity. It has also been used to initiate photothrombotic occlusion in blood.

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Fluoresceinamine, isomer I has been used as a probe in immobilization and is used to determine its ability to potentiate the antiviral activity of poly r (A-U).

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1-Methoxy-5-methylphenazinium methyl sulfate (MPMS) is a photochemically stable electron-transport mediator between NAD(P)H and tetrazolium dyes. The reduced form of MPMS converts tetrazolium salt to purple precipitate formazan. It is a very stable and non-enzymic electron carrier that mediates electron transfer by dehydrogenases in vitro to various electron acceptors such as tetrazolium dyes or the electrode of an enzymic electric cell.

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Rhodamine 123 is useful as a laser dye and to have selective cell growth effects. It has also been used to measure mitochondrial membrane potential.

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Fast Red Violet LB Salt has been used for the detection of tartrate-resistant acid phosphatase (TRAP) in tissue sections.

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Useful for staining DNA, chromosomes and nuclei. May be used for fluorescence microscopy or flow cytometry.
Excitation max. = 346 nm
Emission max. = 460 nm
bisBenzimide H 33342 trihydrochloride has been used for the staining of viable and apoptotic.

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Kit is used to demonstrate acid phosphatase and tartrate resistant acid phosphatase (TRAP) in blood, bone marrow and tissue touch preparations.

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Chlorazol Black has been used to monitor the infection of mycorrhizal Allium porrum in plant roots. It has also been used for the staining of copepods.

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Arsenazo III has been used as a color forming reagent to determine uranium concentration.

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Certified for Giemsa stain for blood films and for the Wolbach′s Giemsa method for paraffin sections. Giemsa is a versatile polychromatic stain, which is suitable for staining a diverse range of specimens. It is a buffered thiazine-eosinate solution designed to provide coloration of blood cells. Giemsa’s stain is frequently used for diagnostic purposes in hematology to differentiate the nuclear and cytoplasmic morphology of platelets, RBCs, WBCs, and parasites. It is frequently used in combination with other dye solutions as May-Grunwald’s solution for Pappenheim (MGG) and Wright-Giemsa. The Giemsa stain was adapted to histology due to its unique staining of chromatin, nuclear membranes, and cytoplasmic elements. Giemsa′s staining solution is composed of methylene blue, azure, and eosin.