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789 matches found for catalysis

Materials Issues in Polymer Electrolyte Membrane Fuel Cells

• • Download PDF • Nancy L. Garland*1, Thomas G. Benjamin2 and John P. Kopasz2 1 U.S. Department of Energy, 1000 Independence Avenue, S.W., Washington, D.C. 20585-0121 2 Argonne National Laboratory, 9700 South Cass Avenue, Lemont, IL 60439 *E-mail: Nancy.Garland@ee.doe.gov Fuel cells have the potent...

Mechanical Processing in Hydrogen Storage Research and Development

• • Download PDF • Sigma-Aldrich Materials Science Storing hydrogen in solids—hydrides, composite materials or metal-organic frameworks—offers a unique opportunity for its convenient and safe use in automotive, portable and other applications. Unfortunately, none of the materials currently on the ma...

Amplification of Damaged DNA with Restorase DNA Polymerase (R1028)

• Background • Reagents • Preparation Instructions • Storage and Stability • Procedure • Primer Hot Start • Materials • Troubleshooting Guide • References Restorase® DNA Polymerase with 10x Reaction Buffer combines Sigma's Long and Accurate enzyme technology with a DNA repair enzyme resulting in a b...

Use of PEPscreen® Peptides to Investigate Protein Farnesyltransferase Substrate Specificity

• • Download PDF • Prenylation is an essential post-translational modification for the proper localization and function of many proteins1,2, and is catalyzed by protein farnesyltransferase (FTase) and protein geranylgeranyltransferase type I (GGTase-I). These enzymes catalyze the covalent attachment...

Diversinates™: Any-Stage Functionalization of (Hetero)aromatic Scaffolds

The synthesis of heteroaromatic and aromatic compounds is at the heart of the chemical industry. With the ever-growing demand of new chemical entities coupled to the dwindling resources and time constraints allotted to any given research project, a rapid way to diversify (hetero)aromatic scaffolds i...

[JIM BALL TEST DOC] MIDA-protected Boronate Esters

Josephine Nakhla Product Manager The Suzuki-Miyaura cross-coupling reaction is one of the most important and highly utilized reactions in organic chemistry, with applications in polymer science as well as in the fine chemicals and pharmaceutical industries. However, some classes of boronic acids are...

Synthesis of Mesoporous Materials

• • Download PDF • Mespoporous materials, also known as mesoporous molecular sieves, are a class of 3D-nanostructures with well-defined mesoscale (2–50 nm diameter) pores and surface areas up to 1000 m2/g.1 In terms of characteristic ordered feature size, they occupy a unique place between crystalli...

Noble-Metal Nanostructures with Controlled Morphologies

• • Download PDF • 1Department of Chemistry and 2Department of Biomedical Engineering, Washington University, St. Louis, MO *Email: xia@biomed.wustl.edu Noble-metal nanostructures are widely used in a variety of applications ranging from catalysis to electronics, surface plasmon resonance (SPR), sur...

Stephen Heller Group - Professor Product Portal

Related Links • VIEW PRODUCT LIST • Professor Product Portal • Catalysis and Inorganic Chemistry • Organic Synthetic Chemistry Professor Product Portal Index Professor Stephen Heller Professor Heller and coworkers are engaged in the development of mild and chemoselective acylation reactions using ca...

glyoxalase I
Synonyms GLOD1, GLYI
Species Human (2739) , Species Mouse (109801) , Species Rat (294320) , Species Zebrafish (368213) , Species domestic cat (101085123) , Species cow (540335) , Species dog (474894) , Species chicken (421428) , Species sheep (101102520) , Species domestic guinea pig (100726491) , Species naked mole-rat (101699804)
Summary: The enzyme encoded by this gene is responsible for the catalysis and formation of S-lactoyl-glutathione from methylglyoxal condensation and reduced glutatione. Glyoxalase I is linked to HLA and is localized to 6p21.3-p21.1, between HLA and the centromere. [provided by RefSeq, Jul 2008]

Baseclick EdU Cell Proliferation Detection Kits: Improve Data Quality and Save Time

Experimental studies measuring cell proliferation have had implications in cancer biology, immunology, cell biology, and developmental biology. Various methods for monitoring cell proliferation have been developed. Counting cells using a hemocytometer is one of the simplest methods used to monitor c...

Schaus MBH Catalyst

Aldrich ChemFiles 2006, 6.4, 13. A highly enantioselective addition of cyclohexenone to different aldehydes (asymmetric Morita–Baylis–Hillman reaction) catalyzed by octahydro-BINOL-derived Brønsted acid (669172) was reported by Schaus (Scheme 15). Important for achieving high enantioselectivity were...

Cycloaddition Reagents

Aldrich ChemFiles 2006, 6.2, 8. 1-(2-Methoxyethoxy)-1-vinycyclopropane Vinylcyclopropanes (VCPs) are excellent scaffolds for construction of seven-membered and bicyclic ring systems. Paul Wender, of Stanford University, has developed a simple but versatile VCP reagent (1-(2-methoxyethoxy)-1-vinycycl...

Alkyne Hydration

The hydration of alkynes has been extensively studied for more than 100 years. This reaction allows access to various carbonyl derivatives from alkyne precursors. Nolan and coworkers reported alkyne hydration using a gold catalyst. Nolan, a pioneer in the use of N-heterocyclic carbenes (NHCs) as lig...

Sonogashira Reaction in Water at Room Temperature using TPGS-750-M

TPGS-750-M, DL-α-Tocopherol methoxypolyethylene glycol succinate, is a designer surfactant composed of a lipophilic α-tocopherol moiety and a hydrophilic PEG-750-M chain, joined by an inexpensive succinic acid linker. TPGS-750-M spontaneously forms micelles upon dissolution in water. The balance and...

Mesoporous Oxides and Their Applications to Hydrogen Storage

Related ontent • Deposition Grade Silanes for Sol-Gel Processes • • Download PDF • 1Lawrence Berkeley National Laboratory 1 Cyclotron Road, Berkeley, CA 94720 2H2 Technology Consulting LLC 33902 Juliet Circle Fremont, CA 94555 *E-mail: ajhunt@lbl.gov, kgross@h2techconsulting.com, ssmao@newton.berkel...

Stradiotto Group – Professor Product Portal

Related Links • VIEW PRODUCT LIST • Professor Product Portal • Catalysis and Inorganic Chemistry • Organic Synthetic Chemistry Professor Product Portal Index Professor Mark Stradiotto The main focus of the Stradiotto group has centered on the development and application of novel electronically rich,...

CHES Specification Comparison

Synonym: 2-(Cyclohexylamino)ethanesulfonic acid CHES is a zwitterionic N-substituted aminosulfonic acid. CHES is used for studying pH-dependent processes in enzymology1. Useful pH Range 8.6 - 10.0 Working concentration range 20mM-60mM5,6 Comparison of products by grade or quality level Name CAS Mole...

Enzyme Class Index: Hydrolases other

Sigma offers over 1,600 enzymes as well as associated inhibitors and substrates. TO SEARCH FOR AN ENZYME BY EC # OR REACTION CATALYZED... 1. Click on a category in the menu below 2. Scroll down the list to the enzyme of interest 3. Click on the Product # to access product listing and related informa...

Cycloaddition

Aldrich ChemFiles 2009, 9.5, 7. Following their work developing chiral gold complexes for the enantioselective hydroamination, Toste and coworkers looked at the [2+2] cycloaddition of allenenes.1 Resulting from this work was the first catalyzed cycloisomerization of allenenes to alkylidenes-cyclobut...

Alkyne Hydrosilylation

• • Download PDF • Vinyl-metal reagents play a pivotal role in organic synthesis. Among the vinyl-metal reagents available, silicon-based reagents are of increasing importance. This is largely due to their low cost, minimal toxicity, ease of handling, and the simplicity of byproduct removal. Particu...

Willis Pyridinates for Palladium-Catalyzed Cross-Coupling Reactions

Related Links • Chemical Synthesis Technology Spotlights • Synthetic Reagents • C-C Bond Formation Reagentss The Suzuki-Miyaura cross-coupling reaction is one of the most used transformations in the pharmaceutical industry to form carbon-carbon bonds.1,2 However, limitations to the application of th...

Selective Amination of Polyhalopyridines Catalyzed by a Palladium-Xantphos Complex

Amination of 5-bromo-2-chloropyridine (1a) catalyzed by a palladium-Xantphos complex predominately gives 5-amino-2-chloropyridine product 3a in 96% isolated yield and excellent chemoselectivity (3a/4a-97:3). Amination of 2,5-dibromopyridine under the same conditions exclusively affords 2-amino-5-bro...

Mesoporous Titanium Dioxide Thin Films

Related Articles • Synthesis of Melting Gels using Mono-Substituted and Di-Substituted Alkoxysiloxanes • Nanostructured Materials through Ultrasonic Spray Pyrolysis • Advanced Inorganic Materials for Solid State Lighting • Materials for Energy Efficiency (4.18 Mb PDF) • Nanoscale Surface Modificatio...

Changing the Landscape of Environmental and Energy Research Through Novel Nanoscale Materials

Related Articles • Electrode Materials for Lithium Ion Batteries • Surface-enhanced Solar Energy Conversion Systems Using Gold and Silver Nanoparticles • Materials for Clean H2 Production from Bioethanol Reforming • U.S. Department of Energy’s System Targets for On-Board Vehicular Hydrogen Storage •...

PEPPSI™-IPent for Demanding Cross-Coupling Reactions

Professor Mike Organ and co-workers have developed the PEPPSI™ (Pyridine-Enhanced Precatalyst Preparation Stabilization and Initiation) precatalysts for palladium-catalyzed cross-coupling reactions. PEPPSI™ palladium precatalysts have become a choice alternative to palladium phosphine complexes, as ...

Strauss Group – Products available at Aldrich from the Strauss Laboratory

Professor Product Portal Index Professor Steven Strauss The Strauss group has been among the leaders in the synthesis and applications of new superweak anions for the past three decades. Superweak anions (a term coined by us in 1998 in connection with an ACS Symposium on weakly-coordinating anions),...

Silica-coated Gold Nanoparticles: Surface Chemistry, Properties, Benefits and Applications

In the past few decades, research and commercial use of gold nanoparticles has rapidly expanded into fields extending from biomedical engineering1 to photovoltaics.2 Most applications take advantage of the excellent optical properties of gold nanoparticles, which can be fine-tuned by varying their s...

Chiral Disulfonimides

In recent years, asymmetric counteranion-directed catalysis (ACDC) has found a number of valuable applications in enantioselective synthesis.1 Beginning in 2006, Benjamin List2 and others have expanded this field to encompass a broad range of useful transformations. Sigma-Aldrich is proud to offer t...

Click Chemistry, a newer approach to the synthesis of drug-like molecules

A "Click" Away from Discovery The traditional process of drug discovery based on natural secondary metabolites has often been slow, costly, and labor-intensive. Even with the advent of combinatorial chemistry and high-throughput screening in the past two decades, the generation of leads is dependent...

Selective 1,2-Additions with LaCl3·2LiCl

While the 1,2-addition of Grignard reagents to ketones is undoubtedly a powerful transformation, oftentimes selectivity issues arising from competitive alpha-deprotonation detract from the use of these reagents. Various methods have been developed to address this shortcoming, including the use of Ce...