854 Results for: "Hydrochloric Acid"

Supplier: C&G Containers

These glass vial are used primarily for the collection and testing of aqueous samples for Volatile Organic Analysis and Total Petroleum Hydrocarbons (TPH) and for the collection and testing of aqueous samples for Total Organic Carbon (TOC). Secondary uses include containment of extracts. Please refer to the applicable Certificate of Analysis for certified analytes and corresponding reporting limits.

Supplier: BIOASSAY SYSTEMS

For quantitative determination of chromium Cr(VI).

Supplier: Thermo Fisher Scientific

For storage in mechanical and vapor-phase liquid nitrogen freezers, at temperatures from –196 to 121 °C (–321 to 250 °F).

Supplier: Ward's Science

With this classic AP chemistry experiment, students predict the outcome of stressors.

Supplier: MilliporeSigma

ImmunoPen™ is designed to minimize waste of antibody in immunostaining techniques on paraffin sections, frozen sections, or cytology preparations. When applied in a circle around the specimen, forms a hydrophobic barrier, retaining antibody.

Supplier: AGILENT TECHNOLOGIES, INC (CSD)

These ICP-MS nebulizers, available in three models, disperse sample solutions from the peristaltic pump as a fine mist into the spray chamber using gaseous argon.

Supplier: Labconco

Refrigerated CentriVap™ Pro Vacuum Concentrators are designed to rapidly concentrate heat-sensitive samples, such as RNA and proteins, using centrifugal force, vacuum and controlled temperature. This concentrator combines a refrigeration system that cools to –10 °C with a heater that warms to 100 °C to achieve the user’s desired set point temperatures. As many as 296 sample containers may be processed at once when utilizing double-stacked rotor arrangement. Sample sizes range from a few microliters up to 50 ml.

Supplier: MP Biomedicals

Urea is the principal end product of nitrogen metabolism in most mammals, formed by the enzymatic reactions of the Kreb's cycle.
Urea is a mild agent usually used in the solubilization and denaturation of proteins. It is also useful for renaturing proteins from samples already denatured with 6 M guanidine hydrochloride such as inclusion bodies; and in the extraction of the mitochondrial complex. It is commonly used to solubilize and denature proteins for denaturing isoelectric focusing and two-dimensional electrophoresis and in acetic acid-urea PAGE gels. Urea is used in cell or tissue culture media to increase the osmolality. Urea has also been used as fertilizer because of the easy availability of nitrogen; in animal feeds; it is reacted with aldehydes to make resins and plastics; condensed with malonic ester to form barbituric acid; used in the paper industry to soften cellulose; used as a diuretic; enhances the action of sulfonamides; an antiseptic.
Urea in solution is in equilibrium with ammonium cyanate. The form that reacts with protein amino groups is isocyanic acid. Urea in the presence of heat and protein leads to carbamylation of the proteins. Carbamylation by isocyanic acid interferes with protein characterization because isocyanic acid reacts with the amino terminus of proteins, preventing N-terminal sequencing. Isocyanic acid also reacts with side chains of lysine and arginine residues resulting in a protein that is unsuitable for many enzymatic digests. In addition, carbamylation often leads to confusing results from peptides having unexpected retention times and masses. When performing enzymatic protein digests it is important to remove urea first. Even though some enzymes will tolerate small amounts of urea, the elevated temperature used for most reactions will lead to carbamylation during the course of the digest. The urea can be removed prior to digestion by fast reversed phase chromatography, spin columns, or dialysis.
Dissolve urea in deionized water to the desired concentration.For every 10 ml of solution, add 1 g of Amberlite® IRA-910.Stir for one hour at room temperature

Supplier: C&G Containers

These glass vials from C&G Containers are designed primarily for the collection and testing of solid samples for Volatile Organic Analysis and Total Petroleum Hydrocarbons (TPH), and for the collection and testing of aqueous samples for Total Organic Carbon (TOC).

Supplier: Labconco

Refrigerated CentriVap™ Pro Vacuum Concentrators are designed to rapidly concentrate heat-sensitive samples, such as RNA and proteins, using centrifugal force, vacuum and controlled temperature. This concentrator combines a refrigeration system that cools to –10 °C with a heater that warms to 100 °C to achieve the user’s desired set point temperatures. As many as 296 sample containers may be processed at once when utilizing double-stacked rotor arrangement. Sample sizes range from a few microliters up to 50 ml.

Supplier: DRG International

An enzyme immunoassay for the quantitative determination of caridac specific troponin I in serum.

Supplier: LGC Standards

GUANIDINE-D5 DCL 0.5G

Supplier: LGC Standards

CDN Guanidine-d5 DCl

Supplier: LGC Standards

HYDROXYLAMINE-D3 DCL 5G