1070 Résultats pour : "SIGMA ALDRICH MICROSCOPY"

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4,4'-Dinitro-2-biphenylamine,98%

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2-(3-Nitrophenylsulfonyl)ethanol,97%

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3-Ethyl-2-methylbenzothiazolium iodide, Sigma-Aldrich®

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Bromure de S-éthylthiouronium, Sigma-Aldrich®

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

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Acetone 2,4-Dinitrophenylhydrazone 99% étalon analytique, pour analyse environnementale, Sigma-Aldrich®

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4-(4-Nitrophenylazo) resorcinol, also known as azo violet or magneson I, is a red colored powder. It functions as a spot test reagent and forms blue lake on reaction with Mg(OH)₂ in alkaline solution. It is mainly used for determining the presence of magnesium in the solution. 4-(4-Nitrophenylazo)resorcinol is a pH indicator.

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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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Sudan IV is a hydrophobic azo dye. It stains triglycerides and imparts an intense red colour. The dye does not stain lipid droplets or phospholipids. It is also used a diagnostic assay manufacturing, hematology, histology.

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6-Aminofluorescein has been demonstrated to be useful fluorescent labeling reagent for fullerene-based liposome nanostructures termed 'buckysomes'. 6-aminofluorescein dissolved in 0,1 N NaOH can be quantified from a maximum absorbance at 490 nm. Decarboxylated 6-aminofluorescein dissolved 6 N HCl (prepare by constant boiling at 110 °C for 24 h) can be quantified from a maximum absorbance at 454 nm. Aldehyde groups are formed by oxidateive damage to proteins, which can be detected by conjugation to decarboxylated 6-aminofluorescein. 6-Aminofluorescein has been used to determine its ability to potentiate the antiviral activity of poly r (A-U).

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

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Schiff base which can be converted to amino alcohols and amino esters.

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1,3-Diphenylacetone-p-toluenesulphonylhydrazone ≥98%, Sigma-Aldrich®

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Acid Blue 80, Dye content 40 %

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Acid Blue 25, Dye content 45 %

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2',7'-Dichlorofluorescéine, Sigma-Aldrich®

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1,1'-Dioctadecyl-4,4'-bipyridinium dibromide,97% (Octadecyl viologen dibromide)

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Leucomalachite green has been used as a reagent in presumptive tests which are used to detect invisible blood stains.

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As a direct dye, Direct Yellow 27 is an acid dye with large molecules that will bind to cellulose fibers directly. It is mono azo dye with good light fastness.

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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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Pyronine G, Sigma-Aldrich®

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Sudan II has been used to determine its presence in commercial spices such as hot chilli food samples (LC–ESI–MS/MS).

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Azure A eosinate, poudre, cristaux ou morceaux, Sigma-Aldrich®

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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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1,2,3,4-Tetrahydro-2,2,4,7-tetramethylquinoline,97%

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Picric acid (2,4,6-trinitrophenol) has antibacterial as well as antifungal properties. It stains the fungal spores and hyphae a pale to dark yellow color.

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Ethyl 4'-hydroxy-4-biphenylcarboxylate,98%

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Vert de methyle, Sigma-Aldrich®

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Gentian violet is used in the Gram staining for distinguishing between gram-positive and gram-negative organisms.

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