Stains and Dyes

A variety of solutions used to selectively bind to and enhance the visibility of biological structures using color and/or fluorescence; used for histology, protein staining, electrophoresis, bacterial classification, blotting, etc.

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5,881 – 5,895 of 7,093 results

5,881

Volu Sol Basic Fuchsin, 8 oz / 250 mL, Volu-Sol™

Basic Parafuchsin; an intense alternative to Safranin O in the Gram Stain procedure. Used in acid fast staining

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5,882

Volu Sol Papanicolaou Stain, EA-65, 32 oz / 1 L, Volu-Sol™

Papanicolaou stain used for critical examination of nuclei and cytoplasmic components of exfoliative cells

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5,883

Volu Sol Trichrome Blue Stain (Ryan Modification), 16 oz / 500 mL, Volu-Sol™

Trichrome Blue, recommended for the detection of microsporidia in urine, stool, and nasopharyngeal specimens

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5,884

Volu Sol Methylene Blue, 16 oz / 500 mL, Volu-Sol™

General purpose stain

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5,885

Volu Sol Trichrome Stain (Gomori), 16 oz / 500 mL, Volu-Sol™

Gomori Trichrome, stain for the identification of muscle fibers, collagen, and nuclei. A simplification of the more elaborate stains and combines the plasma stain (Chromotrope 2R) and connective tissue stain (Gomori's Blue) to provide a brilliant contrasting stain. Tests for certain forms of mitochondrial myopathy, also functions as an excellent and rapid stain for parasite determination in fresh or fixed fecal smears. Easily differentiates parasites, cysts, and ova from background material

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5,886

LaMarKa Chemical Company Eriochrome Black T Indicator (in Methanol)

Eriochrome Black T Ind Meth-Bottle 4Oz Plastic

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5,887

Sigma Aldrich Fine Chemicals Biosciences BioTracker 490 Green Cytop

Lipophilic carbocyanine dyes are widely used for labeling neurons in tissues by retrograde labeling and to label membranes in a wide variety of cell types. The dyes are weakly fluorescent in aqueous phase but become highly fluorescent in lipid bilayers. Staining is highly stable with low toxicity and very little dye transfer in between cells making the dyes suitable for long-term cell labeling and tracking studies. When live cells are stained the dyes label plasma membranes and also are taken up into endocytic compartments. Cells can be fixed either before or after staining although permeabilization affects the staining pattern.Unlike PKH dyes BioTracker Cytoplasmic Membrane Dyes do not require a complicated hypoosmotic labeling protocol. They are ready-to-use dye delivery SOLUTIONons that can be added directly to normal culture media to label suspended or adherent cells in culture. Spectral PropertiesAbsorbance 484nmEmission 501nm

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5,888

Sigma Aldrich Fine Chemicals Biosciences BioTracker 488 Green Nucle

The nucleus is a membrane-enclosed organelle found in eukaryotic cells. Cell nuclei contain most of the cells genetic material organized as multiple long linear DNA molecules in complex with a large variety of proteins such as histones to form chromosomes. Traditionally DNA stains such as DAPI and Hoechst have been used for microscopy but require fixation and cannot be used for live cell imaging.The BioTracker 488 Green Nuclear Dye is a cell-membrane permeable green fluorescent DNA dye that specifically stains nuclei in live or fixed cells. It has excellent specificity for DNA without the need for a wash step and it has low toxicity for live cell imaging. The dye is supplied with a vial of verapamil an efflux pump inhibitor that may improve probe retention and live cell staining in certain cell types.Note BioTracker Nuclear Dyes also shows blue fluorescence in the DAPI channel and may not be suitable for multicolor imaging with blue probes.Spectral PropertiesAbsorbance 500nmEmis

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5,889

Ambeed Isoxazol3amine

Isoxazol-3-amine, 1750-42-1, 98%

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5,890

Sigma Aldrich Fine Chemicals Biosciences Starch Azure Potato starch25G

Starch Azure Potato starch25G

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5,891

Sigma Aldrich Fine Chemicals Biosciences BioTracker 555 Orange Cyto

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5,892

Sigma Aldrich Fine Chemicals Biosciences BioTracker 640 Red C2fM4 6

BioTracker synaptic dyes are a series of fluorescent cationic styryl dyes developed to follow synaptic activities at neuromuscular junctions or synapses. These dyes typically have a lipophilic tail at one end and a highly hydrophilic at the other end. In the presence of cells or tissue preparations the dyes partition between the aqueous phase where the dyes are virtually non-fluorescent and the outer leaflet of the cell surface membranes where the dyes insert the lipophilic end into the membranes and become intensely fluorescent. During endocytosis following nerve stimulation the dyes become trapped inside the vesicles. Thus after washing off the dyes on the cell surface the fluorescent signal is proportional to the number of newly formed vesicles. On the other hand during exocytosis the dyes are released from the vesicles along with neurotransmitters causing a decrease in fluorescent signal. As a result the change in fluorescent intensity reflects the amount of endocytosis/

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5,893

Sigma Aldrich Fine Chemicals Biosciences BioTracker QUMA 1 RNA G qu

RNA G-quadruplexes are formed by self-assembly of guanine-rich RNA stacks into stacked G-quartets. This can occur in protein-coding (mRNA) as well as non-coding (ncRNA) transcripts. There is growing evidence that RNA G-quadruplexes are involved in different biological functions telomere elongation DNA recombination transcription RNA post-transcriptional mechanisms (pre-mRNA processing mRNA turnover targeting and translation) and are associated with sevral human diseases.BioTrackerTMSYMBOL/TMSYMBOL QUMA-1 RNA G-quadruplex Live Cell Dye (QUMA-1) is a red-emitting fluorescent probe that can be used to study dynamics (folding and unfolding) and movements of RNA G-quadruplexes. QUMA-1 is a reversible dye that emits upon binding to G-quadruplexes and turns off upon unfolding. QUMA-1 is highly specific for RNA G-quadruplexes and does not bind to DNA double-stranded RNA single-stranded RNA or other RNA structures. QUMA-1 could also potentially be used to study RNA-protein interacti

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5,894

Sigma Aldrich Fine Chemicals Biosciences BioTracker NucViewR 530 Re

Caspases are a family of protease enzymes that play essential roles in programmed cell death termed apoptosis. Caspase-3 is a caspase protein that interacts with caspase-8 and caspase-9 and sequential activation of plays a central role in the execution-phase of cellular apoptosis.The BioTracker NucView 530 Red Caspase-3 Dye provides a convenient live cell tool for profiling apoptotic cell populations based on caspase-3/7 activity using either fluorescence microscopy or flow cytometry. In contrast to other fluorogenic caspase substrates or fluorescent caspase inhibitor based (fLICA) assays the BioTracker NucView 530 Red Caspase-3 Dye can be used to detect caspase-3/7 activity within individual intact cells without inhibiting apoptosis progression. The substrate consists of a fluorogenic DNA dye coupled to the caspase-3/7 DEVD recognition sequence. The substrate which is initially non-fluorescent penetrates the plasma membrane and enters the cytoplasm. In apoptotic cells caspase-3/7

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5,895

Volu Sol Papanicolaou Stain, EA-50, 32 oz / 1 L, Volu-Sol™

Papanicolaou stain used for critical examination of nuclei and cytoplasmic components of exfoliative cells

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Stains and Dyes

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LaMarKa Chemical Company Eriochrome Black T Indicator (in Methanol) Small and Specialty Supplier PartnerSmall and/or specialty supplier based on Federal laws and SBA requirements.Learn More

LaMarKa Chemical Company Eriochrome Black T Indicator (in Methanol)