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Product Image-467-0078

Stopcocks for dessicator

Catalog Number: (467-0078)
Supplier: GLASWARENFABRIK KARL HECHT
Description: Standard ground NS 24/29 Stopcocks, interchangeable, for tubulated cover of desiccators.
UOM: 1 * 1 items
Product Image-467-1255

Stopcocks for dessicator lids

Catalog Number: (467-1255)
Supplier: witeg Labortechnik
Description: DURAN® Borosilicate glass, For: MOBILEX, Stopcock for desiccator lids, borosilicate glass, with PTFE needle valve for thread connection with over twist
UOM: 1 * 1 items

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Product Image-817-1570

Sealing tape, PTFE, Fluo-Kem®, SP Bel-Art

Catalog Number: (817-1570)
Supplier: Bel-Art Products, a Part of SP
Description: Non-sintered PTFE tape for use with desiccators, bell jars, glass joints and freeze-drying equipment for tight seal that will not seize over time.
UOM: 1 * 3 items
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Acrylamide ≥99%, white crystalline powder for molecular biology

Supplier: MP Biomedicals
Description: Storage: Room Temperature, desiccate.
Acrylamide is prepared on an industrial scale by the hydrolysis of acrylonitrile by nitrile hydratase.
Acrylamide is a monomer used in a variety of synthetic processes to form polymers and copolymers. It polymerizes in the presence of free radicals in aqueous solutions. It is usually used to prepare polyacrylamide gels for electrophoresis separation of biomolecules.
Acrylamide is an extremely hazardous substance in either the powder form or liquid form. Once polymerized, the polyacrylamide is considered safe to handle under normal laboratory conditions. Acrylic Acid Content -≤0.001%

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4-Aminobenzoic acid ≥99%, white powder cell culture reagent

Supplier: MP Biomedicals
Description: Storage: Room Temperature, desiccate, protect from light
p-Aminobenzoic acid is an aminobenzoic acid isomer that combines with pteridine and Glutamic acid to form folic acid.
p-Aminobenzoic acid is part of several cell culture media as vitamin H1. In industrial field, it is a starting material in the manufacture of target esters, salts, folic acid, azo dyes and other organic compounds. It is used as an UV-blocking ingredient in sun tan cosmetics. It is used in medical field for preparing local anesthetic and ointments.

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L(+)-Cysteine, white powder cell culture reagent

Supplier: MP Biomedicals
Description: Storage: Store at Room Temperature (15-30 °C). Store Desiccated. Store under nitrogen.
L-Cysteine is a proteinogenic amino acid incorporated into proteins as directed by the genetic code. The thiol-side chain participates in a variety of oxidation/reduction reactions within the cell. The side chain participates in the formation of β bonds that modulate the secondary and ternary structure of proteins. Cysteine is essential and limiting for the formation of glutathione, an important antioxidant, within the cell.
Cysteine has been used in pulse-chase experiments to study protein expression from an inducible promoter. L-Cysteine is used to supplement cell culture media.
NMDA glutamatergic receptor agonist.

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Potassium dihydrogen phosphate, anhydrous, white crystalline powder cell culture reagent

Supplier: MP Biomedicals
Description: Storage: Room Temperature, desiccate
Potassium phosphate is a reagent with high buffering capacity. It occurs in several forms: monobasic, dibasic and tribasic (K3PO4). Most pH neutral potassium phosphate buffer solutions consist of mixtures of the monobasic and dibasic forms to varying degrees, depending on the desired pH.
Potassium phosphate monobasic is typically used as a component for a wide variety of media used in the culture of microorganisms. It is widely used in molecular biology, biochemistry, and chromatography. It is a component in phosphate buffered saline (PBS). In addition to helping maintain pH, it supplies essential phosphate.

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Iron(II) sulphate heptahydrate ≥99%, bluish green granular powder cell culture reagent

Supplier: MP Biomedicals
Description: Storage: Room Temperature, desiccate, store under nitrogen.
Ferrous sulfate heptahydrate is a reagent used in the manufacturing of iron compounds, in electroplating baths, aluminium etching, process engraving and lithography, and in redox polymerisation. It is used as a reducing agent in chemical processes, leather dyes and writing inks. Also, it is a component of weed killers, wood preservatives and water treatment processes. Used In prevention of chlorosis in plants and therapeutically as hematinic. In veterinary medicine, it is used as an astringent to combat iron deficiency. Ferrous sulfate heptahydrate is used in the determination of phosphorus as per the method of Taussky and Shorr. Ferrous sulfate heptahydrate is used in cell culture applications generally bound to transferrin, citrate or other iron transport molecules.

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L(+)-Asparagine, anhydrous ≥99%, white powder cell culture reagent

Supplier: MP Biomedicals
Description: Storage: Store at Room Temperature (15-30 °C). Store Desiccated.
L-Asparagine is used in cell culture media and is a component of MEM non-essential amino acids solution. L-Asparagine has been shown to enhance ornithine decarboxylase activity in cultured human colon adenocarcinoma Caco-2 cells and in cultured IEC-6 intestinal epithelial cells. Spore germination in Bacillus subtilis has been increased in the presence of L-asparagine. An isoxazoline RGD mimic platelet GPIIb/IIIa antagonist has been prepared by chiral synthesis with L-asparagine as a starting material. L-Asparagine has been utilized in the synthesis of 4-azalysine building blocks for application to combinatorial chemistry.

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Dimethyl sulphoxide for molecular biology

Supplier: MP Biomedicals
Description: Storage: Room Temperature, desiccate, store under nitrogen.
Dimethyl Sulfoxide is a dipola, aprotic solvent. It has been shown to accelerate strand renaturation (1-10% concentration) and is believed to give the nucleic acid thermal stability against depurination.
Dimethyl Sulfoxide is used to enhance dermal absorption of many chemicals, as a solvent for many organic and inorganic compounds including fats, carbohydrates, dyes, resins, and polymers, in antifreeze or hydraulic fluids, as a cryopreservative for cell cultures, oxidation of thiols and disulfides to sulfonic acids, as a PCR cosolvent to help improve yields, especially in long PCR. DMSO is routinely used in polymerase chan reaction (PCR), amplification of cDNA libraries, DNA sequencing, column-loading buffers for poly (A)+ RNA selection, buffers for the transformation of competent E. coli, and transfection protocols.
To prepare sterile solutions use a teflon or nylon membrane to sterile-filter the DMSO - do not use a cellulose acetate membrane.

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X-Gal (5-bromo-4-chloro-3-indolyl-ß-D-galactopyranoside) ≥98%, white powder for molecular biology

Supplier: MP Biomedicals
Description: Storage: Store at -20 °C. Store Desiccated. Store Under Nitrogen. Protect from light.
5-Bromo-4-chloro-3-indolyl β-D-galactopyranoside, commonly known as X−Gal, is a histochemical substrate for β−galactosidase.
5-Bromo-4-Chloro-3-Indolyl-β-D-Galactopyranoside is used as indigogenic substrate for β-galactosidase, for detection of β-galactosidase-positive clones, and the identification of lac and bacterial colonies or phage plaques. It is the substrate of choice for blue-white selection of recombinant bacterial colonies with the lac+ genotype. X−Gal is cleaved by β−galactosidase to yield an insoluble blue precipitate. X−Gal is particularly useful in molecular biology applications to detect the activity of β−galactosidase which is frequently used as a reporter gene. In cloning, X−Gal is used to detect insertion of foreign DNA into the lacZ region of plasmid DNA using α-complementation which is based on vectors such as the pUC and the M13mp series that carry a fragment of the β-galactosidase gene encoding an α-fragment of β-galactosidase.

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Protamine sulphate (from salmon sperm), ≥100 USP u/mg, white powder cell culture reagent

Supplier: MP Biomedicals
Description: Storage: Room Temperature, desiccate
Protamine sulfate is a purified mixture of simple protein principles obtained from the sperm or testes of suitable species of fish, which has the property of neutralizing heparin. Because of having many basic amino acids (mostly arginine) protamine contains far greater nitrogen than other proteins. Its molecular weight is relatively small. Histone and other basic proteins in the testes of unmatured fishes convert into protamine along with the growth of the fishes. In the testes, protamine takes the form of nucleoprotamine linked with DNA.
Protamine Sulfate is a raw material for study preparations like insulin compounds, and etc. It is used in separation and refining of vaccines. It is a reagent for removing nucleic acids from enzyme solution for the purpose of easy separation and refining. Protamine in the form of solid lipid nanoparticles (SLN) promoted transfection with plasmid DNA more efficiently and with less cytotoxicity than comparable SLNs composed of Esterquat-1.
Protamine sulfate is a small cationic protein that binds and precipitates DNA. Inhibits lipoprotein lipase. Protamine sulfate shown to inhibit the classical pathway of complement. It inhibits turnover of lipoproteins by lipoprotein lipase.

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Guanidinium hydrochloride ≥99%, crystalline powder, Ultrapure

Supplier: MP Biomedicals
Description: Applications
Guanidine hydrochloride can be used as the first step in refolding proteins or enzymes into their active form. Urea and dithiothreitol (DTT) may also be necessary. Also used in the isolation of RNA. It is a strong chaotropic agent useful for the denaturation and subsequent refolding of protein, it can solubilize insoluble or denatured proteins such as inclusion bodies and be used for the recovery of periplasmic proteins. This can be used as the first step in refolding proteins or enzymes into their active form. Urea and dithiothreitol (DTT) may also be necessary. Also used in the isolation of RNA.
Product Description
The crystal structure of Guanidine hydrochloride consists of a network of guanidinium cations and chloride anions linked by N–H•••Cl hydrogen bonds,it is a strong chaotropic agent.Guanidine HCl may agglomerate upon storage. It may appear as a free-flowing crystalline powder, a freeflowing powder with solid material dispersed throughout, or a solid. The quality of the product does not appear to be affected and solutions prepared from the free-flowing and lumpy guanidine HCl appear identical

Grade: Ultra Pure
Purity: >99%
Keywords: Guanidium chloride, chaotropic agent
Key Applications: Chaeotropic agent
Product Type: Biochemicals
Biochemical Category: Chaotropic Agents
Density: 1.345 g/cm³ at 20 °C (Lit.)
Melting Point: 180-190 °C
UV/Visible Absorbance: OD260nm (6.0 M aq soln) <0.03
Presentation: White Crystalline Powder
pH: 4-6 (6.0 M aq soln)
Solubility: Soluble in water,Clear, Colorless Solution (6 M - clear, colorless solution).
Storage & Handling: Room Temperature, desiccate

SDS

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β-Nicotinamide adenine dinucleotid, oxidised form (NAD, oxidised form) ≥98%, white powder cell culture reagent

Supplier: MP Biomedicals
Description: Storage: -20°C, desiccate
This is an ultrapure NAD, chromatographically purified to remove trace inhibitors.
β-NAD, a pyridine nucleotide and biologically active form of nicotinic acid, is a coenzyme necessary for the catalytic reaction of certain enzymes. It occurs in living cells primarily in the oxidized state. Serves as a coenzyme of the dehydrogenases, especially in the dehydrogenation of primary and secondary alcohols. NAD usually acts as a hydrogen acceptor, forming NADH which then serves as a hydrogen donor in the respiratory chain.
Many metabolites and enzymes of biological interest are present in tissues at low concentrations. With the use of β-NAD as a catalyst intermediate and several enzymes in a multistep system, known as enzyme cycling, much greater sensitivity for detection of these components is achieved. The reduced form, β-NADH, is fluorescent whereas β-NAD is not. This difference in fluorescence provides a sensitive fluorescent measurement of the oxidized or reduced pyridine nucleotides at concentrations down to 10-7 M.
Electron acceptor. β-NAD is a carrier for hydride ion, forming b-NADH. Hydride ion is enzymatically removed from a substrate molecule by the action of dehydrogenases such as malic dehydrogenase and lactic dehydrogenase. Such enzymes catalyze the reversible transfer of a hydride ion from malate or lactate to b-NAD to form the reduced product, b-NADH. Unlike b-NAD which has no absorbance at 340 nm, b-NADH absorbs at 340 nm (EmM = 6.22). The increase in absorbance at 340 nm with the formation of b-NADH is the basis for measurement of activity of many enzymes.

Product Image-551-0018

VWR®, TLC Aluminium Plates, Silica, Unmodified Layers

Supplier: VWR Collection
Description: These TLC aluminium plates are suitable for easy and quick sample applications. They are flexible and can be cut to match different plate size requirements.

Certificates

Image Unavailable-551-0025

VWR®, TLC Glass Plates, Silica HP, Unmodified Layers

Supplier: VWR Collection
Description: These TLC glass plates have an excellent separation efficiency due to an optimised particle size distribution.

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Stock for this item is limited, but may be available in a warehouse close to you. Please make sure that you are logged in to the site so that available stock can be displayed. If the call is still displayed and you need assistance, please call us on 0800 22 33 44
Additional Documentation may be needed to purchase this item. A VWR representative will contact you if needed.
Additional Documentation may be needed to purchase this item. A VWR representative will contact you if needed.
This product has been blocked by your organisation. Please contact your purchasing department for more information.
The original product is no longer available. The replacement shown is available.
Product(s) marked with this symbol are discontinued - sold till end of stock. Alternatives may be available by searching with the VWR Catalogue Number listed above. If you need further assistance, please call VWR Customer Service on 0800 22 33 44.
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