707 Results for: "Chemistry and Chemicals&amp"

Supplier: Heidolph NA, LLC

For smooth to intense mixing and heating of low-viscosity fluids the Hei-PLATE Mix 'N' Heat Expert magnetic hotplate stirrers, are an excellent choice for use with decomposing organic and inorganic substances.

Supplier: Globe Scientific

Globe Glass™ beakers are made with uniform wall thickness, flat bottoms, and low expansion 3.3 Borosilicate beaker glass, making them a strong and durable choice with excellent resistance to thermal shock. The lab beakers have beaded rims and formed spouts to facilitate accurate and steady pouring of liquids. Globe Glass™ low form Griffin style graduated beakers are available in sizes from 10 to 4000 ml.

Supplier: MP Biomedicals

Acetic Acid Glacial, Solvent for many organic compounds, widely used as starting material or as a solvent, Purity: >/= 99%, CAS Number: 64-19-7, Molecular Formula: C2H4O2, MW: 60. 05, Synonyms: Methanecarboxylic acid, Ethanoic acid, Vinegar acid, Ethylic acid, Size: 500g

Supplier: CHEMetrics

Ceric sulfate is the titrant and ferroin is the end point indicator. The method is free from glycol interference in samples that contain up to 75% glycol, making it particularly applicable to systems that contain nitrite corrosion inhibitors. Results are expressed as ppm (mg/L) NaNO2.

Supplier: YMC America,Inc

YMC-Triart C18, 3 µm is a novel, organic/inorganic hybrid silica particle derivatized with C18 (L1 USP designation).

Supplier: Cloud-Clone

This assay has high sensitivity and excellent specificity for detecting General species PEG (Polyethylene Glycol). The assay range is from 12.35 to 1000 ng/ml (Competitive kit) with a sensitivity of 4.63 ng/ml. There is no detectable cross-reactivity with other relevant proteins. Activity loss rate and accelerated stability test ect have been conducted to guarantee the best performance of the products after long storage and delivery.

Supplier: Labconco

Evaporation systems use nitrogen blow down, vortex motion, and heat to speed up evaporation of up to 48 small samples or eight 450mL samples at once

Supplier: Heidolph NA, LLC

For smooth to intense mixing and heating of low-viscosity fluids the Hei-PLATE Mix 'N' Heat Ultimate magnetic hotplate stirrers, are an excellent choice for use with decomposing organic and inorganic substances.

Supplier: Labconco

Evaporation systems use nitrogen blow down, vortex motion, and heat to speed up evaporation of up to 48 small samples or eight 450 ml samples at once

Supplier: Eppendorf

Flex-Tube® microtubes (1.5 ml) are designed for seamless one-handed operation with an easy-to-open, securely closing tube design. Perfect for sample preparation, centrifugation, and storage, these tubes will effortlessly integrate into workflows for efficient and reliable performance.

Supplier: CHEMetrics

The ammonia test kits employing the well-established Nessler reagent to determine ammonia concentrations are applicable to drinking water, clean surface water, and good-quality nitrified wastewater effluent.

Supplier: MilliporeSigma

The Reflectoquant® Ammonium test includes test strips and all necessary additional reagents and is suitable for determination potentially harmful pollution in surface and ground water, which are caused by ammonium compounds. Depending on the pH level ammonia is formed, which is a potent toxin for fish. In agriculture the Reflectoquant® test strips can be used to measure the ammonium nitrogen content of various types of manure and compost after sample preparation. Ammonium ions react with a chlorinating agent to form monochloramine. This in turn reacts with a phenol compound to form a blue indophenol derivative that is determined reflectometrically on the RQflex®. For pre-testing a sample in an economic and quick way to estimate the ammonium concentration and a possible dilution factor prior to using this quantitative method we recommend our semi-quantitative MQuant® test strips for ammonium. Further quantitative determination methods can be found with our Spectroquant® tests.

Supplier: MP Biomedicals

Applications:
Urea is used for the denaturation of proteins and as a mild solubilization agent for insoluble or denatured proteins. Useful for renaturing proteins from samples already denatured with 6 M guanidine chloride 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. May be used with guanidine hydrochloride and dithiothreitrol (DTT) in the refolding of denatured proteins into their native or active form. 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.
Biochem/physiol Actions:
Urea has been shown to act as an aldosterone antagonist in the development of peanut agglutinin binding in cultured embryonic renal collecting duct epithelial cells. Urea is the principal end product of nitrogen metabolism in most mammals, formed by the enzymatic reactions of the Kreb's cycle.
Typical Working Concentration:
The use of 2 g/L urea in the culture of Kluyveromyces marxianus to produce a thermostable extracellular lipase has been described. Urea is typically used at a concentration of 8 M for protein denaturation or solubilization. A final concentration of 5 M urea is commonly used in molecular biology for sequencing gels. To prevent carbamylation, do not heat urea containing buffers above 37 °C

Supplier: Avantor

Solve U/HPLC method development challenges systematically and efficiently using Avantor® ACE® columns and ChromSword 5.1 Lite method development software. The Avantor® ACE® ChromSword Method Development Kit includes six alternative selectivity Avantor® ACE® phases, a copy of ChromSword 5.1 Lite offline with a six month activation licence and a lot of technical information and support.

Supplier: Zymo Research

The Quick-RNA™ FFPE kit provides a simple and reliable method for RNA isolation from formalin-fixed, paraffin embedded (FFPE) tissue samples.

Supplier: CELLTREAT Scientific Products

Multiple and single cavity reagent reservoirs for efficient and organized liquid handling, particularly in repetitive or robotic liquid transfer tasks.

Supplier: CELLTREAT Scientific Products

Multiple and single cavity reagent reservoirs for efficient and organized liquid handling, particularly in repetitive or robotic liquid transfer tasks.