192 Results for: "pH Colored Solutions"

Supplier: SPEX CERTIPREP LLC

Certified pH buffers are made using high purity starting materials and ASTM Type I Water, and are thoroughly analyzed for certified value and homogeneity. Buffers are accurate, premium grade for calibration and quality control checks.

Supplier: Spectrum Chemicals

Strong Iodine Solution, 5 Percent (w/v) (DEA List I Chemical), USP. 

Supplier: MP Biomedicals

Streptozotocin, a glucosamine-nitrosourea, is a DNA alkylating agent that enters cells exclusively via the GLUT2 glucose transport protein. Streptozocin, a diabetagen, is especially toxic to pancreatic islet insulin-producing β-cells. It is toxic to GLUT2 positive neuroendocrine tumor cells.

Supplier: Honeywell Research Chemicals

Nitric acid, Purity: >/=65%, Grade: Puriss. P.a, Reag. ISO, Reag. Ph. Eur, Cas: 7697-37-2, MF: HNO3, Molar Mass: 63.01 g/mol, Synonym: Laboratory Chemical, Color/Form: Colorless to Almost Colorless Liquid, Application: Determinations wit

Supplier: Adipogen

Fluorescent probe and pH indicator. It fluoresces blue in acidic solutions and in acidic organelles but fluoresces green in more basic organelles. This compound is potentially useful as a coloring agent, biological stain or optical detecting reagent. It is used in water-in-oil-in-water emulsions and as a substrate for lipase activity. Spectral data: lambdaex 375nm, lambdaem 404nm in water.

Supplier: Spectrum Chemicals

Bromocresol Purple is a pH indicator that is typically prepared as a 0.04% solution. It is used to measure albumin in medical laboratories and is added to acid stop baths used in photographic film processing to indicate when the solution is no longer acidic and needs to be replaced

Supplier: MP Biomedicals

Imidazole is a histamine antagonist.
Imidazole can be used to prepare buffers in the pH range of 6.2-7.8 at 25 °C. It is also a chelator for the binding of various divalent cations.
Solutions can be successfully sterilized by autoclaving, and are stable for at least 2 years at 2-8 °C, protected from light

Supplier: CANCER DIAGNOSTICS, INC.

The Endure Staining System is designed to produce precise, consistent H&E staining.

Supplier: Avantik

Optik Type 1 Bluing Reagent is bluing reagent with a pH of 8.0 to assure proper bluing of hematoxylin stained tissue sections. It is also more resistant to the effects of carry-over and remains in the proper pH range for a longer period of time.

Supplier: G-Biosciences

Ellman's reagent is a versatile, water-soluble compound for quantifying free sulfhydryl groups in solution. It reacts with a free sulfhydryl group to yield a mixed disulfide and 2-nitro-5-thiobenzoic acid (NTB), a measurable yellow colored product at 412nm.
Ellman's reagent is very useful as a free sulfhydryl assay reagent due to its high specificity for -SH groups at neutral pH, high molar extinction coefficient and short reaction time.

Supplier: MP Biomedicals

Pure Canavalia ensiformis lectin (Con A) from Jackbean.

Supplier: Electron Microscopy Sciences

Fixative Reagent Grade (Karnovsky’s). This fixative contains 3% glutaraldehyde and 2% formaldehyde in 0.1M phosphate buffer, pH 7.4. Karnovsky’s with formalin 2% and Biological glutaraldehyde 3% in 0.1m Phosphate Buffer. Karnovsky’s with paraformaldehyde solution and EM grade glutaraldehyde.

Supplier: MilliporeSigma

pH indicator papers supplied in rolls are better suited for longterm storage, since they are protected against external influences

Supplier: Adipogen

Water soluble pH indicator used in the 6.8 (yellow) to 8.2 (red) range and frequently used in cell biology laboratories. Widely used as cell tissue culture pH marker. A small amount of phenol red added to the growth medium will have a pink-red color under normal conditions. Typically, 15 mg/l are used for cell culture. In the event of problems, waste products produced by dying cells or overgrowth of contaminants will cause a change in pH, leading to a change in indicator color. For example, a culture of relatively slowly dividing mammalian cells can be quickly overgrown by bacterial contamination. This usually results in an acidification of the medium, turning it yellow. The waste products produced by the mammalian cells themselves will slowly decrease the pH, gradually turning the solution orange and then yellow. This color change is an indication that even in the absence of contamination, the medium needs to be replaced. Shown to be a weak estrogen mimic (possible through inpurities), which can enhance the growth of cells that express the estrogen receptor in cell cultures. Might be useful as a differentiation factor.

Supplier: Electron Microscopy Sciences

Michel’s Fixative, pH 7.0 – 7.4

Supplier: Rockland Immunochemical

TMB ELISA Peroxidase Substrate (3, 3', 5, 5' - Tetramethylbenzidine) is a chromogenic substrate used to visualize antibody reactivity in ELISA experiments. In the presence of peroxidases, TMB can act as an electron donor for the conversion of peroxides to water, changing the color of solution to a blue color equivalent to the degree of reactivity. This reaction can be halted with acid to change the TMB to yellow. TMB ELISA Peroxidase Substrate is ideal for investigators in Microbiology, Immunology, and Cancer research.

Supplier: Epredia

Employ a gentle, pH-controlled solution for bluing hematoxylin with the Epredia™ Shandon™ Bluing Reagent.

Supplier: StatLab

A buffered alkaline rinse with a mild pH (8.0).

Supplier: MP Biomedicals

Folic acid, also known as folate, is a B vitamin that can be found in a variety of fruits and vegetables. It can also be chemically synthesized. Folate, a watersoluble vitamin, helps the body form red blood cells and aids in the formation of genetic material within every body cell. This product exhibits metal binding properties. Hematopoietic vitamin present, free or combined with one or more additional molecules of L-(+)-glutamic acid, in liver, kidney, mushrooms, spinach, yeast, green leaves, and grasses.
Folic acid (Vitamin B9 and folate) is essential to numerous bodily functions. The human body needs folate to synthesize DNA, repair DNA, and methylate DNA as well as to act as a cofactor in certain biological reactions. It is especially important in aiding rapid cell division and growth, such as in infancy and pregnancy.
Folic acid (FA) and dihydrofolic acid (FAH2) are substrates of dihydrofolate reductase(s) which reduce them to tetrahydrofolate (THF), which in turn supports ‘one carbon’ transfer. Tetrahydrofolates are required for de novo synthesis of purines, thymidylic acid and various amino acids and for post-translational methylation (epigenetics).
Very slightly soluble in cold water (0.0016 mg/mL at 25 °C), soluble to about 1% in boiling water. Slightly soluble in methanol, appreciably less soluble in ethanol and butanol. Insoluble in acetone, chloroform, ether, benzene. Relatively soluble in acetic acid, phenol, pyridine, solutions of alkali hydroxides and carbonates. Soluble in hot dilute HCl and H2SO4.

Supplier: MP Biomedicals

3,3',5,5'-Tetramethylbenzidine is suitable as peroxidase substrate for use in ELISA procedures. The substrate produces a soluble end product that is pale blue in color and can be read spectrophotometrically at 370 or 620 to 650 nm. The TMB reaction may be stopped with 2 M H₂SO₄ (resulting in a yellow color), and read at 450 nm. A sensitive and specific reagent for the detection of blood, assay of hemoglobin, assay of peroxidases. It is useful in gel staining procedure for low levels of home-associated peroxidases and for enzyme immunoassay of horseradish peroxidase.

Supplier: StatLab

A buffered alkaline rinse with a mild pH (8.0).

Supplier: Electron Microscopy Sciences

Millonig’s phosphate buffered formalin as modified by Carson, Martin and Lynn, by using 4% formalin in 0.1M sodium phosphate monobasic with sodium hydroxide to pH 7.2

Supplier: Epredia

Ensure crisp nuclear detail with the ready-to-use Epredia™ Signature Series™ Bluing Reagent.

Supplier: Electron Microscopy Sciences

Premixed, prebuffered fixatives, that are pH adjusted for immediate laboratory use. They are freshly prepared upon receipt of order to ensure maximum shelf life. The fixatives are filled in 20 mL glass vials (10 mL/vial). This allows for the immediate fixation of your specimens without costly and time consuming transfer associated with ampoule contained fixatives.

Supplier: Electron Microscopy Sciences

Perfusion washes and fixatives are ready to use solution which are recommended by the NeuroScience Association.

Supplier: MP Biomedicals

Aprotinin is a natural inhibitor of trypsin, chymotrypsin and plasmin. It is found in bovine lymph nodes, lung, parotid gland, spleen, liver, pancreas, seminal vesicles, thyroid gland, kidney, mucous membranes of the trachea and esophagus, ovaries, heart, posterior pituitary and cartilage.A serine protease inhibitor which is reactive against trypsin, chymotrypsin, plasmatic and glandular kininogenases, plasmin, kallkrein, urokinase, clotting factor XIIa, protein C, proteinases of the complement system, and leukocyte and tissue proteinases. It does not inhibit thrombin. Aprotinin works by blocking the active sites of enzymes. Binding is reversible with most aprotinin-protease complexes dissociating at pH > 10 or < 3.
Aprotinin is a competitive serine protease inhibitor that forms stable complexes with and blocks the active sites of enzyme. This binding is reversible, and most aprotinin-protease complexes will dissociate at extreme pH levels >10 or <3. Structurally, Aprotinin is a monomeric globular protein derived from bovine lung that consists of 58 amino acids, arranged in a single polypeptide chain with three crosslinking disulfide bridges.

Supplier: Electron Microscopy Sciences

Citifluor™ mountant media containing antifadents solutions reduce the photo-bleaching or fading of the fluorescence of dyes used for labeling biological species.

Supplier: Enzo Life Sciences

In order to perform immunostaining, tissue specimens should be preserved in an appropriate fixative.

Supplier: Electron Microscopy Sciences

Premixed, prebuffered fixatives, that are pH adjusted for immediate laboratory use.

Supplier: Adipogen

A sensitive reagent for measuring the free sulfhydryl content in proteins, peptides, and tissues. Used to characterize reactive thiol groups and photometric determination of thiols and for measuring low-molecular mass thiols such as glutathione in both pure solutions and biological samples, such as blood. It can also measure the number of thiol groups on proteins. Through reaction with aliphatic thiol groups a mixed disulfide of protein thiol and one mole of 2-nitro-5-thiobenzoate per mole of protein sulfhydryl group is being formed. DTNB has little absorbance. Reaction with -SH groups on proteins (from any solvent accessible Cys) under mild alkaline conditions (pH 7-8) produces the 2-nitro-5-thiobenzoate anion, which gives an intense yellow color with an absorption maximum at 409.5nm (Extinction coefficient: 14150 M-1*cm-1). Sensitive to various buffer ions, therefore, the extinction coefficient used to calculate the number of sulfhydryl groups must be matched to the reaction conditions. In case the thiol groups are in disulfide bonds, they must be reduced under anaerobic conditions prior to reaction with DTNB.