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Barbituric acid ≥98%, J.T.Baker®

Catalog Number: (BAKRB654-05)

Supplier: Avantor

Description: Barbituric acid ≥98%, J.T.Baker®

UOM: 1 * 100 g

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Barbituric acid ≥99%

Supplier: Thermo Scientific

Description: Barbituric acid ≥99%

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Barbituric acid, AnalaR NORMAPUR®

Supplier: VWR Chemicals

Description: Barbituric acid, AnalaR NORMAPUR®

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Murexide analytical reagent

Catalog Number: (VWRC25717.120)

Supplier: VWR Chemicals

Description: Murexide analytical reagent

UOM: 1 * 10 g

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Murexide for complexometry, Fluka™

Catalog Number: (HONC33414-10G)

Supplier: Honeywell Chemicals

Supplier Article Number:: 33414-10G

Description: Murexide for complexometry, Fluka™

UOM: 1 * 10 g

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Murexide

Supplier: Thermo Scientific

Description: Murexide

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Sodium barbiturate, Sigma-Aldrich®

Supplier: Merck

Description: Sodium barbiturate, Sigma-Aldrich®

Barbituric acid

Catalog Number: (EDQMY0000762)

Supplier: EDQM

Supplier Article Number:: Y0000762

Description: Barbituric acid

UOM: 1 * 10 mg

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N,N-Dimethylformamide dimethyl acetal methylation reagent, for GC derivatisation

Supplier: MACHEREY-NAGEL

Description: Methylation with DMF-DMA can be applied for fatty acids, primary amines and partially amino acids forming N-dimethyl-aminomethylene amino acid methyl esters. DMF-DMA is a poor solvent, for this reason it is necessary to use a mixture of DMF-DMA with pyridine, THF, acetone (barbiturates) or another solvent.

HPTLC plates, nano silica gel 60, modified layers, Nano-SIL C18

Supplier: MACHEREY-NAGEL

Description: Octadecyl-modified HPTLC silica glass plates are recommended for alkaloids, amino acids, preservatives, optical brighteners, barbiturates, polycyclic aromatic hydrocarbons (PAH), drugs, peptides, flavonoids, phenols, indole derivatives and steroids.

Urea ≥98%, white powder for molecular biology

Supplier: MP Biomedicals

Description: 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

Drug test kit

Supplier: VWR Chemicals

Description: This kit provides a convenient means of screening suspect material for restricted drugs. The scheme and reagents were developed at the laboratory of the government chemist. Each kit provides sufficient reagents for at least 200 tests.

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HPTLC Plates, Silica Gel 60, Modified Layers, RP-18 W/UV₂₅₄

Supplier: MACHEREY-NAGEL

Description: Octadecyl-modified HPTLC silica layers available as glass plates or ALUGRAM® aluminium sheets. Recommended for aminophenol, barbiturates, preservatives, nucleobases, polycyclic aromatic, hydrocarbons, steroids, tetracyclines, and plasticisers (phthalates).