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Search term:"BAR"

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486 matches found for BAR

41mm to 60mm Length Polygonal Stir Bars - Polygon Stir Bars

Sigma-Aldrich Online Catalog Product List: 41mm to 60mm Length Polygonal Stir Bars

Spinfin® and Sure Spin™ - Bel-Art Magnetic Stirring Bars

Sigma-Aldrich Online Catalog Product List: Spinfin and Sure Spin

Gene-Specific Product Search

Use the search bar below to find products related to the gene you are studying. Sigma-Aldrich has a wide array of products for your gene to help with all aspects of your experiment. Each gene is mapped to available specific antibodies, zinc finger nucleases, cell lines, AQUA™ peptides, 3'UTR GoClone...

Pressure Unit Converter

• • • • • • • • • Thousands Separator 1,000 1'000 bar psi (pound per square inch) kPa (kilopascal) hPa (hectopascal) MPa (megapascal) mbar (millibar) Pa (pascal) kgf/cm2 (kilogram per square centimeter) kgf/m2 (kilogram per square meter) N/m2 (newton per square meter) kN/m2 (kilonewton per square me...

LC-MS Solvents and Reagents

New LC-MS systems have raised the bar on the purity expectations of chemicals used for sample preparation, mobile phases and post-column additives. Alkali ions, plasticizers and surfactants interfere strongly with LC-MS by causing higher background noise and the formation of adducts. Sigma-Aldrich h...

shRNA Frequently Asked Questions for Analysis

Can I knockdown highly stable proteins using shRNAs? Does the MISSION® TRC Library include a bar code that I could use for microarray analysis? Do you guarantee knockdown using your clones? Are there any issues associated with using the CMV promoter? What is the correlation between mRNA and protein ...

SCOTTY Gas Cylinder Specifications

SCOTTY 4 Contents: 4 Liters (0.14 cf) Pressure: 120 psig (8 bar) Outlet Fitting: Aerosol-type push button with applicator tube Weight: 0.2 lbs. (approximately 100 grams) Dimensions: 2 1/3" X 8" (63.5 mm x 203.2 mm) U.S. D.O.T. Specs: 2Q SCOTTY 14 Contents: 14 Liters (0.5 cf) Pressure: 240 psig (17 b...

BRAND Stirrers - BRAND

Browse Sigma-Aldrich's BRAND Stirrers to find products in BRAND magnetic stirring bar, PTFE, disc-shaped, BRAND magnetic stirring bar, PTFE, double-ended, BRAND magnetic stirring bar, PTFE, round, with crosshead, BRAND magnetic stirring bar, PTFE, spherical, BRAND magnetic stirring bar retriever, BR...

A Single Phosphine Ligand Allows Palladium-Catalyzed Intermolecular C-O Bond Formation with Secondary and Primary Alcohols-

The substrate scope of the copper-free Sonogashira coupling has been successfully extended to cyclopropyl iodides, allowing an efficient access to a wide variety of functionalized alkynyl cyclopropanes. An oven-dried Schlenk tube (equipped with a magnetic stirring bar) was charged with PdCl2(MeCN)2 ...

Stereospecific Cross-Coupling of Secondary Organotrifluoroborates: Potassium 1-(Benzyloxy)alkyltrifluoroborates

The synthesis of potassium trifluoro(N-methylheteroaryl)borates and their use in cross-coupling reactions with various aryl and heteroaryl halides to construct N-methyl heteroaryl-substituted aromatic and heteroaromatic compounds are reported. A 10 mL microwave vial equipped with a stirrer bar was c...

Upchurch Ulta-Low Volume Precolumn Filter, 0.5 and 2 μm - Upchurch Ultra-Low Volume Precolumn Filters

These precolumn filters have a 0.020" diameter through hole, a stainless steel body, and are pressure rated to 9000 psi (620 bar). They will accept 1/16" tubing and standard 10-32 threaded high pressure fittings.

BIOshell™ A160 Peptide CN, 2.7 μm HPLC Columns - BIOshell™ HPLC Columns

BIOshell A160 Peptide CN columns packed with 2.7 m particles, 160 Å pores, are as efficient as sub-2-m porous particles, but at half the backpressure.BIOshell A160 Peptide CN columns can be operated long term at pressures up to 600 bar (60 MPa or 8500 psi), temperatures up to 90 °C and within the pH...

Sigma-Aldrich Vertical Electrophoresis Accessories - Vertical Gel Electrophoresis Units

Browse Sigma-Aldrich's Sigma-Aldrich Vertical Electrophoresis Accessories to find products in Dual plate vertical electrophoresis unit, Sigma-Aldrich Bar Clamp for Vertical Electrophoresis, TV100 mini vertical electrophoresis unit accessories

Preparing for IEF

The components of the Immobiline® DryStrip Kit include a tray and electrode holder, anode and cathode electrodes, an Immobiline® DryStrip aligner, a sample cup bar, and sample cups. Procedures A and B below should be completed before the Immobiline® DryStrip gels are removed from the Immobiline® Dry...

Upchurch Ultra-Low Volume Precolumn Filter, 0.5 μm - Upchurch Ultra-Low Volume Precolumn Filters

With a 0.010" diameter thru-hole, this filter has one of the lowest swept volumes of any HPLC precolumn filter available, ensuring maximum protection with very little band broadening. It is pressure rated to 9,000 psi (620 bar).

BIOshell™ A160 Peptide C18, 2.7 μm HPLC Columns - BIOshell™ HPLC Columns

BIOshell A160 Peptide C18 columns packed with 2.7 m particles, 160 Å pores, are as efficient as sub-2-m porous particles, but at ½ the backpressure.BIOshell A160 Peptide C18 columns can be operated long term at pressures up to 600 bar (60 MPa or 8500 psi), temperatures up to 90 °C and within the pH ...

radiello® Air Sampler Components

radiello Table of Contents The essential parts of radiello are the adsorbing cartridge, the diffusive body, the supporting plate and the adhesive label with the bar code indication. Apart from the adsorbing cartridge, if not differently stated, all of the other components can be repeatedly used for ...

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Upchurch PEEK LiteTouch® Fittings - PEEK HPLC Fittings

Unique design prevents twisting of PEEK tubing. The fitting consists of a special PEEK ferrule, a stainless steel ring, and a PEEK or stainless steel nut for 1/16 in. tubing. The fitting will not leak at pressures to 5000 psi/340 bar with the PEEK nut, 2500 psi/175 bar with the stainless steel nut f...

Spectroquant® Test Kits for Spectrophotometric Analysis

For Swift, Secure and Precise Analysis, There is No Better Choice Than Spectroquant® Test Kits. Ready-to-Use Test Kits – optimized and easy handling for routine and special analyses. Reliable Results – with validated standard-compliant reagents Bar-code Identification – automated method recognition ...

Recent Developments in Silicon Anode Materials for High Performance Lithium-Ion Batteries

Xuefeng Song,1* Xiaobing Wang,2 Zhuang Sun,1 Peng Zhang,1 and Lian Gao1 1State Key Laboratory for Metallic Matrix Composite Materials, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China 2Baoshan Iron & Steel Co., Ltd. Tube, Pipe and Bar Business, Baos...

A General, Practical Palladium-Catalyzed Cyanation of (Hetero)Aryl Chlorides and Bromides

The nontoxic cyanide source K4[Fe(CN)6]�3H2O can be used for the cyanation of (hetero)aryl halides. The application of palladacycle catalysts prevents poisoning during catalyst formation, thereby allowing for low catalyst loadings, fast reaction times, and wide heterocyclic substrate scope. To a scr...

Cross-Coupling Highly Selective Palladium-Catalyzed Secondary Alkylzinc Reagents with Heteroaryl Halides

The highly selective palladium-catalyzed Negishi coupling of secondary alkylzinc reagents with heteroaryl halides is described. The development of atseries of biarylphosphine ligands has led to the identification of an improved catalyst for the coupling of electron-deficient heterocyclic substrates....

A New Palladium Precatalyst Allows for the Fast Suzuki-Miyaura Coupling Reactions of Unstable Polyfluorophenyl and 2-Heteroaryl Boronic Acids

A method for the Pd-catalyzed coupling of 2-aminothiazole derivatives with aryl bromides and triflates is described. Significantly, for this class of nucleophiles, the coupling exhibits a broad substrate scope and proceeds with a reasonable catalyst loading. Furthermore, an interesting effect of ace...

Selective Monoarylation of Acetate Esters and Aryl Methyl Ketones Using Aryl Chlorides

A series of palladacyclic precatalysts that incorporate electron-rich di-tert-butylphosphino biaryl ligands is reported. These precatalysts are easily prepared, and their use provides a general means of employing bulky ligands in palladium-catalyzed cross-coupling reactions. The application of these...

Ligand-Controlled Palladium-Catalyzed Regiodivergent Suzuki- Miyaura Cross-Coupling of Allylboronates and Aryl Halides-

Pd-PEPPSI-IPent has proven to be an excellent catalyst for the Negishi cross-coupling reaction of secondary alkylzinc reagents with a wide variety of aryl/heteroaryl halides. Importantly, b-hydride elimination/migratory insertion of the organometallic leading to the production of isomeric coupling p...

Efficient Pd-Catalyzed Amination Reactions for Heterocycle Functionalization

The Pd-catalyzed amination of unprotected benzo-fused heterocycles is reported, which allows for greater flexibility and efficiency in the modification of this important class of molecules. The generality of these simple and efficient procedures is demonstrated through the synthesis of a wide variet...

Suzuki-Miyaura Cross-Coupling of Potassium Trifluoro(N-methylheteroaryl)borates with Aryl and Heteroaryl Halides

A new bulky biarylphosphine ligand (L8) has been developed that allows the Pd-catalyzed C-O cross-coupling of a wide range of aryl halides and phenols under milder conditions than previously possible. A direct correlation between the size of the ligand substituents in the 2�, 4�, and 6� positions of...

Protocol -KitAlysis High-Throughput Palladium Precatalyst Cross-Coupling Reaction Screening Kit

Related Links • Materials Included in your KITALYSIS-24PD-2PK High-Throughput Screening Kit • Scale-Up Guide: Palladium Precatalyst Cross-Coupling Reaction Screening Kit 24 pre-weighed Palladium Precatalysts Useful for: Suzuki-Miyaura Buchwald-Hartwig Negishi Heck Sonagashira Borylation Ni/Pd co cat...

Stille Kit

Product No. 802336 Compound Catalog No. Equivalents MW Density Amount mmol Kit Components Pd[P(t-Bu)3]2 676578 0.03 511.05 7.7 mg 0.015 DABCO D27802 3.0 112.17 170 mg 1.50 NaCl S9888 1.0 58.44 30 mg 0.50 TPGS-750-M 733857 1.002 2.0 mL User Supplied Aryl bromide [ArBr] 1.0 0.50 Organotributyltin reag...

Protocol KitAlysis™ High-Throughput Base Reaction Screening Kit

7 pre-weighed bases 4 base solutions (DBU (neat), Et3N (neat), LiHMDS (1.0 M in THF), and NaOtBu (2.0 M in THF)) 4 solvents (MeOH, Toluene, DMF, and THF) Materials Required - Set up: • 1 mylar bag from the KitAlysis™ High-Throughput Base Screening Kit and you will use the following components - 7 x ...