1051 Résultats pour : "SIGMA ALDRICH MICROSCOPY"

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Homovanillic acid has been used as a standard in HPLC analysis. Metabolite of dihydroxyphenylacetic acid (DOPAC) by catechol O-methyltransferase; reagent for the fluorimetric determination of glucose oxidase and other oxidative enzymes.

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Hydroxy naphthol blue disodium salt, ACS reagent.

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2, 5-Dibromo-6-isopropyl-3-methyl-1, 4-benzoquinone has been used as a metabolic inhibitor of violaxanthin (V) cycle of Pelvetia canaliculata and is used as a photosynthetic electron transport chain (pETC) inhibitor.

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

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1,3-Bis(2,3-diaminophénylazo)benzene, chlorhydrate, Sigma-Aldrich®

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Bromophenol blue (BroB), an arylmethane color marker dye has a molecular mass of 670 Da.

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Silver enhancer solution A has been used for silver staining.

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Azophloxine has been used as a dye in Von Kossa staining and nonlinear optical studies. It is also used in photocatalytic tests.

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Phenol Red Sodium Salt (PRSS) is a water-soluble anionic fluorescent dye, that possesses an extra Na ion attached with the SO3 group compared to phenol red. It is intended for use in cell culture applications. A solution of phenol red will have a yellow color at a pH of 6,4 or below and a red color at a pH of 8,2 and above.

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For use in the detection of phospholipids and related compounds.

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Chlorure de 3-amino-7-dimethylaminophénothiazine-5-ium, Sigma-Aldrich®

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Brilliant cresyl blue ALD has been used for the staining of reticulocytes.

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Xylene cyanol is often used as a tracking dye during agarose or polyacrylamide gel electrophoresis. It has a slightly negative charge and will migrate in the same direction as DNA, allowing the user to monitor the progress of molecules moving through the gel. The tracking dye typically migrates with the DNA molecules around 5 kb. Xylene cyanol may also be used in loading buffer that facilitates the observation of the sample during gel loading and electrophoresis.

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1-(2-Méthyl-4-(2-méthylphénylazo)phénylazo)-2-naphtol, Sigma-Aldrich®

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2,6-Diphenyl-4H-thiopyran-4-one,96%

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Folin & Ciocalteu's phenol reagent is most commonly used in the Lowry method for determining protein concentration. It has also been used for the quantification of total phenolics. In this method, protein is pretreated with copper(II) in a modified biuret reagent (alkaline copper solution
stabilized with sodium potassium tartrate). Addition of the phenol reagent generates chromogens that give increasing absorbance between 550-750nm. Normally, absorbance at the peak (750 nm) or shoulder (660 nm) are used to quantitate protein concentrations between 1 - 100 mg/ml while absorbance at 550 nm is used to quantitate higher protein concentrations.

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Bis(cyclohexanone)oxaldihydrazone (Cuprizone) has been used in mice to study the effect of NG2 (neural/glial antigen 2) proteoglycan on toxic-induced demyelination. It has been used to induce demyelination in mice. It has been used to study cuprizone-induced demyelination and remyelination in the corpus callosum of mice.

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ACCUSPIN System-Histopaque-1077 products are intended for use in the isolation of lymphocytes and other mononuclear cells. The separation medium, Histopaque-1077, is a sterile-filtered, endotoxin-tested solution of polysucrose and sodium diatrizoate, adjusted to a density of 1,077 g/ml. ACCUSPIN System-HISTOPAQUE-1077 employs γ-irradiated 50 mL polypropylene centrifuge tubes specially designed with two chambers separated by a porous high-density polyethylene barrier ('frit'). Each tube is aseptically filled with 15 ml of Histopaque 1077. Each tube will separate 15-30 mL of anticoagulated blood.

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Phosphate buffer's buffering capacity is pH sensitive and is preferred to be used at physiological pH (7,2 to 7,4).

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When mixed with a 4% sodium nitrite solution, a freshly hexazotized pararosaniline solution is produced. May be used in a variety of cytochemistry procedures, including Sigma Procedures 181B and 181C.

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Used for the preparation of electrically conducting glasses. Used to make solutions for the separation of RNA from DNA by density gradient centrifugation.

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Gram’s iodine solution is used as a mordant in the Gram staining process. It is added after the primary staining step with crystal violet; the resultant crystal violet - Iodine complex imparts purple color to the cells.

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2-(5-Bromo-2-pyridylazo)-5-(diethylamino)phenol,97% (Bromo-PADAP).

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

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Bromophenol Blue–Xylene Cyanol Dye solution has been used in the formamide loading buffer for the size purification of ligated RNA from polyacrylamide gel.

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Disperse Blue 134, for microscopy (1,4-Bis(isopropylamino)anthraquinone; Solvent Blue 36).

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Fluorescent dye.

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Naphthol AS-D chloroacetate can be used as laboratory chemicals, manufacture of substances.

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Tetrabromophenol Blue (TBPB) belongs to the group of sulfonephthalein acid-base indicators. It is employed in the potentiometric titration of the halogens with Hg₂(NO₃)₂. In addition, it has been used as a dye indicator in urine dipstick test to detect proteinuria. In this assay, with increasing concentration of urinary protein, TBPB sequentially changes colour from pale green to blue. Binding of TBPB to proteins is dependent on pH.

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Erythrosin extra bluish is a brown color powder, that is soluble in ethanol and water. Its pH ranges from 2,5 to 4. It is used in color filters, light emitting diodes, cosmetics, hair dyes and more. It has several biological applications like detecting gene expression, treating age related macular degeneration, diabetes, obesity and more.