380 Resultat för: "VARLP080520VARI00001"

Supplier: SIGMA ALDRICH MICROSCOPY

5-Fluorouracil has been used to induce apoptosis in cells. It has been used as a chemosensitising agent. A potent antitumor agent that affects pyrimidine synthesis by inhibiting thymidylate synthetase, thus depleting intracellular dTTP pools. It is metabolized to ribonucleotides and deoxyribonucleotides, which can be incorporated into RNA and DNA. Treatment of cells with 5-FU leads to an accumulation of cells in S-phase and has been shown to induce p53 dependent apoptosis.

Supplier: Merck

Cytoplasm staining esp. for non-gynecological specimen, color effect light red

Supplier: SIGMA ALDRICH MICROSCOPY

Isopentyl nitrite, also known as isoamyl nitrite, is an oxidant, and nitrosating agent for phosphoramidites which rearrange into phosphotriesters during nitrosation.

Supplier: SIGMA ALDRICH MICROSCOPY

Methyl Green is a triphenylmethane dye which is mainly used in combination with pyronin. It is suitable for the detection of DNA and RNA. Used in the Methyl Green-Pyronin methods to demonstrate DNA and RNA in tissue sections.

Supplier: SIGMA ALDRICH MICROSCOPY

Carbol Fuchsin is a basic dye which forms a yellow-brown compound in presence of acid. It is mainly required for the staining of mycobacteria. The waxy walls of mycobacteria helps in retaining the dye within cells. It can also be used for the staining of bacterial spores.

Supplier: SIGMA ALDRICH MICROSCOPY

(3-Aminopropyl)triethoxysilane forms aminopropyl derivative of glass, an adsorbent for affinity chromatography. It is used to prepare positively charged slides suitable for use with various immunohistochemical and in situ hybridisation procedures.

Supplier: SIGMA ALDRICH MICROSCOPY

Membrane impermeant, phenanthridinium intercalator dye excited by mercury or xenon-arc lamps or argon-ion laser. Suitable for use in fluorescence microscopy, confocal laser scanning microscopy, flow cytometry, and fluorometry. Used as a nuclear counterstain.

Supplier: SIGMA ALDRICH MICROSCOPY

Methyl Blue is a triaminotriphenylmethane dye, widely used in paper, textile and leather production.

Supplier: SIGMA ALDRICH MICROSCOPY

Safranin O is a cationic dye, which displays less significant metachromasia. It is used to detect any variations in articular disease. Safranin O binds specifically to polyanions. It detects the amount of proteoglycan present in cartilages. Safranin O is used as a marker for glycosaminoglycan depletion in osteoarthritis. Safranin is used as a counter stain in gram staining.

Supplier: SIGMA ALDRICH MICROSCOPY

Bathophenanthrolinedisulfonic acid disodium salt hydrate has been used to measure iron to determine the solubility of iron in the biological sample. It has been used as an iron chelator to grow plants without Fe-EDTA (ethylenediaminetetraacetic acid).

Supplier: SIGMA ALDRICH MICROSCOPY

Azure A is a basic cationic dye. The combination of azure A and silver staining is used for the quantification of glycosaminoglycans in agarose gels. It is also used for the staining of chromosomes in the nucleus. It is a main component of the azure B/polychromed methylene blue – eosin stains family, also referred to as the Romanowsky stain.

Supplier: Merck

Haematoxylin solution modified acc. to Gill III

Supplier: SIGMA ALDRICH MICROSCOPY

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.

Supplier: SIGMA ALDRICH MICROSCOPY

Neutral red (C.I. 50040) is a protonated diaminophenazine dye. It is aminodimethylaminomethylphenazinehydrochloride, C15H17N4Cl.

Supplier: SIGMA ALDRICH MICROSCOPY

Osmium tetroxide (OsO₄) is a heavy tetrahedral, symmetrical molecule composed of osmium, a third-row transition metal. Osmium tetroxide is both a dye, and a non-coagulant fixative agent in electron microscopy primarily used for the examination of biological tissue components in the histopathology laboratory. Specimens are postfixed with osmium testroxide to ensure preservation of the lipids.

Supplier: SIGMA ALDRICH MICROSCOPY

2-Hydroxy-1,4-naphthoquinone is one among the forensic reagents used for fingerprint detection. 2-Hydroxy-1,4-naphthoquinone, produced from Lawsonia inermis, is an orange dye. It belongs to the class of naphthoquinone dyes. 2-Hydroxy-1,4-naphthoquinone is used to dye hair and to color textiles. It has antibacterial, antifungal, anti-inflammatory, antiviral and antineoplastic properties. 2-Hydroxy-1,4-naphthoquinone inhibits tumor cell growth. It stimulates the production of reactive oxygen species (ROS).

Supplier: SIGMA ALDRICH MICROSCOPY

Esterases are ubiquitous in nature and encompass a series of different enzymes acting upon select substrates.

Supplier: Merck

For use in hematology and clinical cytology

Supplier: SIGMA ALDRICH MICROSCOPY

2,3-Diaminonaphthalene is also known as 2,3-Naphthalenediamine or DAN. It is one of the isomers of naphthalene bearing two amino groups, which are also called naphthalenediamines. They are usually prepared by reducing the nitronaphthalene derivative and aminating the subsequent hydroxynaphthalene derivative.

Supplier: SIGMA ALDRICH MICROSCOPY

Phenol Red is a phenolsulfonphthalein compound. It is present as a sulfonated hydroxyquinone in weakly acidic aqueous solutions. In alkaline solutions, the dye forms a hydrophilic dianion (a small, red anion and has a larger conjugated system than the yellow hydroxyquinone).

Supplier: Merck

The Giemsa’s Azure Eosin Methylene Blue solution can be used for the staining of blood and bone marrow smears, paraffin sections and clinical-cytological specimens.

Supplier: SIGMA ALDRICH MICROSCOPY

Chromotrope 2R has been used in the Gomori trichrome staining in osteochondral tissues. It has also been used for the staining of eosinophils in lung sections. Chromotrope 2R is used for the staining of microsporidia in body fluids and stool samples. It is used in modified Gomori′s trichrome staining. Chromotrope 2R has high affinity for phospholipids and is used for the staining of mitochondrial and endoplasmic reticulum membrane in histological samples.

Supplier: SIGMA ALDRICH MICROSCOPY

Methyl orange (C.I. 13025) is the sodium salt of p-dimethylaminoazobenzenesulfonic acid. It is an orange-colored synthetic dye, which changes color depending on the pH of the solution. It develops a red color in acidic solution and yellow color in basic solution.

Supplier: SIGMA ALDRICH MICROSCOPY

Ponceau S (C.l. 27195) is an anionic, very hydrophilic disazo dye. It is also known as fast ponceau 2B. Ponceau S is widely used to stain proteins on gel electropherograms. It is a suitable stain for proteins adsorbed onto nitrocellulose membranes. It also has applications in botanical staining manuals as a stain for sieve plate elements.

Supplier: SIGMA ALDRICH MICROSCOPY

Leishman stain is a Romanowsky-type dye, similar to Wright stain. Leishman stain is used in hematology and tropical medicine to differentiate and identify leukocytes, malarial parasites, and trypanosomes. It is also known as eosin-polychrome methylene blue.

Supplier: SIGMA ALDRICH MICROSCOPY

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.

Supplier: Merck

Counterstain for Gram staining

Supplier: SIGMA ALDRICH MICROSCOPY

4-Amino-3-hydroxy-1-naphthalenesulfonic acid is a derivative of aniline consisting of a trifunctional monomer (bearing three functional groups –NH₂, –OH and –SO₃H). It also contains two fused benzene rings.

Supplier: SIGMA ALDRICH MICROSCOPY

Poly-L-lysine is a positively charged amino acid polymer with approximately one HBr per lysine residue. The hydrobromide allows the poly-L-lysine to be in a crystalline form soluble in water. A small amount of product may be found in the beta structure because the HBr interferes with hydrogen bonding between amino and either the carboxyl groups or N or O containing moieties.

Supplier: SIGMA ALDRICH MICROSCOPY

Aurintricarboxylic acid ammonium salt has been used as a nuclease inhibitor to study its effects on transfection.