Catalysis
Biocatalysis
Catalytic Domain
Models, Molecular
Substrate Specificity
Binding Sites
Crystallography, X-Ray
Mutagenesis, Site-Directed
Molecular Sequence Data
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
Amino Acid Sequence
Protein Conformation
The characteristic 3-dimensional shape of a protein, including the secondary, supersecondary (motifs), tertiary (domains) and quaternary structure of the peptide chain. PROTEIN STRUCTURE, QUATERNARY describes the conformation assumed by multimeric proteins (aggregates of more than one polypeptide chain).
Escherichia coli
A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc.
Models, Chemical
Hydrogen-Ion Concentration
RNA, Catalytic
RNA that has catalytic activity. The catalytic RNA sequence folds to form a complex surface that can function as an enzyme in reactions with itself and other molecules. It may function even in the absence of protein. There are numerous examples of RNA species that are acted upon by catalytic RNA, however the scope of this enzyme class is not limited to a particular type of substrate.
Molecular Structure
Protein Structure, Tertiary
The level of protein structure in which combinations of secondary protein structures (alpha helices, beta sheets, loop regions, and motifs) pack together to form folded shapes called domains. Disulfide bridges between cysteines in two different parts of the polypeptide chain along with other interactions between the chains play a role in the formation and stabilization of tertiary structure. Small proteins usually consist of only one domain but larger proteins may contain a number of domains connected by segments of polypeptide chain which lack regular secondary structure.
Protein Binding
Structure-Activity Relationship
Antibodies, Catalytic
Oxidation-Reduction
A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471).
Stereoisomerism
Sequence Homology, Amino Acid
Hydrogen Bonding
Base Sequence
Mutation
Amino Acid Substitution
The naturally occurring or experimentally induced replacement of one or more AMINO ACIDS in a protein with another. If a functionally equivalent amino acid is substituted, the protein may retain wild-type activity. Substitution may also diminish, enhance, or eliminate protein function. Experimentally induced substitution is often used to study enzyme activities and binding site properties.
Enzyme Stability
Enzymes
Aspartic Acid
Metals
Protein Structure, Secondary
Thermodynamics
A rigorously mathematical analysis of energy relationships (heat, work, temperature, and equilibrium). It describes systems whose states are determined by thermal parameters, such as temperature, in addition to mechanical and electromagnetic parameters. (From Hawley's Condensed Chemical Dictionary, 12th ed)
Magnesium
Sequence Alignment
The arrangement of two or more amino acid or base sequences from an organism or organisms in such a way as to align areas of the sequences sharing common properties. The degree of relatedness or homology between the sequences is predicted computationally or statistically based on weights assigned to the elements aligned between the sequences. This in turn can serve as a potential indicator of the genetic relatedness between the organisms.
Protons
Conserved Sequence
Cloning, Molecular
Oxidoreductases
The class of all enzymes catalyzing oxidoreduction reactions. The substrate that is oxidized is regarded as a hydrogen donor. The systematic name is based on donor:acceptor oxidoreductase. The recommended name will be dehydrogenase, wherever this is possible; as an alternative, reductase can be used. Oxidase is only used in cases where O2 is the acceptor. (Enzyme Nomenclature, 1992, p9)
Adenosine Triphosphate
Spectrophotometry
Proton-Translocating ATPases
Nucleic Acid Conformation
Manganese
A trace element with atomic symbol Mn, atomic number 25, and atomic weight 54.94. It is concentrated in cell mitochondria, mostly in the pituitary gland, liver, pancreas, kidney, and bone, influences the synthesis of mucopolysaccharides, stimulates hepatic synthesis of cholesterol and fatty acids, and is a cofactor in many enzymes, including arginase and alkaline phosphatase in the liver. (From AMA Drug Evaluations Annual 1992, p2035)
NADP
Nicotinamide adenine dinucleotide phosphate. A coenzyme composed of ribosylnicotinamide 5'-phosphate (NMN) coupled by pyrophosphate linkage to the 5'-phosphate adenosine 2',5'-bisphosphate. It serves as an electron carrier in a number of reactions, being alternately oxidized (NADP+) and reduced (NADPH). (Dorland, 27th ed)
Flavins
Temperature
Alkenes
Protein Structure, Quaternary
Cyclization
Dimerization
Flavin-Adenine Dinucleotide
Diethyl Pyrocarbonate
Crystallization
NAD
A coenzyme composed of ribosylnicotinamide 5'-diphosphate coupled to adenosine 5'-phosphate by pyrophosphate linkage. It is found widely in nature and is involved in numerous enzymatic reactions in which it serves as an electron carrier by being alternately oxidized (NAD+) and reduced (NADH). (Dorland, 27th ed)
Asparagine
Circular Dichroism
Chemistry, Organic
Lewis Acids
Electron Spin Resonance Spectroscopy
A technique applicable to the wide variety of substances which exhibit paramagnetism because of the magnetic moments of unpaired electrons. The spectra are useful for detection and identification, for determination of electron structure, for study of interactions between molecules, and for measurement of nuclear spins and moments. (From McGraw-Hill Encyclopedia of Science and Technology, 7th edition) Electron nuclear double resonance (ENDOR) spectroscopy is a variant of the technique which can give enhanced resolution. Electron spin resonance analysis can now be used in vivo, including imaging applications such as MAGNETIC RESONANCE IMAGING.
Heme
Palladium
Magnetic Resonance Spectroscopy
Zinc
A metallic element of atomic number 30 and atomic weight 65.38. It is a necessary trace element in the diet, forming an essential part of many enzymes, and playing an important role in protein synthesis and in cell division. Zinc deficiency is associated with ANEMIA, short stature, HYPOGONADISM, impaired WOUND HEALING, and geophagia. It is known by the symbol Zn.
Oxygen
Quantum Theory
Enzyme Activation
Spectrophotometry, Ultraviolet
Alanine
Hydrogen
The first chemical element in the periodic table. It has the atomic symbol H, atomic number 1, and atomic weight [1.00784; 1.00811]. It exists, under normal conditions, as a colorless, odorless, tasteless, diatomic gas. Hydrogen ions are PROTONS. Besides the common H1 isotope, hydrogen exists as the stable isotope DEUTERIUM and the unstable, radioactive isotope TRITIUM.
Water
Isomerism
Electrons
Stable elementary particles having the smallest known negative charge, present in all elements; also called negatrons. Positively charged electrons are called positrons. The numbers, energies and arrangement of electrons around atomic nuclei determine the chemical identities of elements. Beams of electrons are called CATHODE RAYS.
Cations, Divalent
Chorismate Mutase
DNA Primers
Oxygenases
Ligands
A molecule that binds to another molecule, used especially to refer to a small molecule that binds specifically to a larger molecule, e.g., an antigen binding to an antibody, a hormone or neurotransmitter binding to a receptor, or a substrate or allosteric effector binding to an enzyme. Ligands are also molecules that donate or accept a pair of electrons to form a coordinate covalent bond with the central metal atom of a coordination complex. (From Dorland, 27th ed)
Coenzymes
Phosphines
Hydrolases
Any member of the class of enzymes that catalyze the cleavage of the substrate and the addition of water to the resulting molecules, e.g., ESTERASES, glycosidases (GLYCOSIDE HYDROLASES), lipases, NUCLEOTIDASES, peptidases (PEPTIDE HYDROLASES), and phosphatases (PHOSPHORIC MONOESTER HYDROLASES). EC 3.
Tryptophan
An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals.
Aldehyde-Lyases
Amino Acid Motifs
Geobacillus stearothermophilus
Glutamic Acid
Thiamine Pyrophosphate
Solvents
Mixed Function Oxygenases
Widely distributed enzymes that carry out oxidation-reduction reactions in which one atom of the oxygen molecule is incorporated into the organic substrate; the other oxygen atom is reduced and combined with hydrogen ions to form water. They are also known as monooxygenases or hydroxylases. These reactions require two substrates as reductants for each of the two oxygen atoms. There are different classes of monooxygenases depending on the type of hydrogen-providing cosubstrate (COENZYMES) required in the mixed-function oxidation.
Mutagenesis
Multienzyme Complexes
Pyridoxal Phosphate
This is the active form of VITAMIN B 6 serving as a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. During transamination of amino acids, pyridoxal phosphate is transiently converted into pyridoxamine phosphate (PYRIDOXAMINE).
Organic Chemistry Phenomena
Saccharomyces cerevisiae
Flavin Mononucleotide
Chromatography, High Pressure Liquid
Tyrosine
Apoenzymes
Electrophoresis, Polyacrylamide Gel
Protein Subunits
Glutamine
Iron
Allosteric Regulation
Point Mutation
Serine
DNA
A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine).
Steroid Isomerases
Crystallography
Disulfides
Lyases
Alcohol Oxidoreductases
A subclass of enzymes which includes all dehydrogenases acting on primary and secondary alcohols as well as hemiacetals. They are further classified according to the acceptor which can be NAD+ or NADP+ (subclass 1.1.1), cytochrome (1.1.2), oxygen (1.1.3), quinone (1.1.5), or another acceptor (1.1.99).
Hydro-Lyases
Deuterium
Nucleotides
Enzyme Inhibitors
Adenosine Monophosphate
Molecular Dynamics Simulation
Hydroxylation
Amino Acids
Organophosphorus Compounds
Isomerases
Cattle
Thermotoga maritima
A rod-shaped bacterium surrounded by a sheath-like structure which protrudes balloon-like beyond the ends of the cell. It is thermophilic, with growth occurring at temperatures as high as 90 degrees C. It is isolated from geothermally heated marine sediments or hot springs. (From Bergey's Manual of Determinative Bacteriology, 9th ed)
Amination
Ions
Adenosine Diphosphate
Isoenzymes
Macromolecular Substances
Nuclear Magnetic Resonance, Biomolecular
Cobalt
Electron Transport
Phosphoric Triester Hydrolases
Chorismic Acid
Free Radicals
Highly reactive molecules with an unsatisfied electron valence pair. Free radicals are produced in both normal and pathological processes. They are proven or suspected agents of tissue damage in a wide variety of circumstances including radiation, damage from environment chemicals, and aging. Natural and pharmacological prevention of free radical damage is being actively investigated.
Amino Acid Isomerases
Protein Engineering
Procedures by which protein structure and function are changed or created in vitro by altering existing or synthesizing new structural genes that direct the synthesis of proteins with sought-after properties. Such procedures may include the design of MOLECULAR MODELS of proteins using COMPUTER GRAPHICS or other molecular modeling techniques; site-specific mutagenesis (MUTAGENESIS, SITE-SPECIFIC) of existing genes; and DIRECTED MOLECULAR EVOLUTION techniques to create new genes.
Glycine
Hydroxylamine
Plasmids
Endoribonucleases
Ribonuclease P
Metalloproteins
Methyltransferases
Carbonic Anhydrase II
Titrimetry
The determination of the concentration of a given component in solution (the analyte) by addition of a liquid reagent of known strength (the titrant) until an equivalence point is reached (when the reactants are present in stoichiometric proportions). Often an indicator is added to make the equivalence point visible (e.g., a change in color).
S-Adenosylmethionine
Models, Biological
Structural Homology, Protein
Nonheme Iron Proteins
Enzyme Reactivators
Transition Elements
Ribulose-Bisphosphate Carboxylase
A carboxy-lyase that plays a key role in photosynthetic carbon assimilation in the CALVIN-BENSON CYCLE by catalyzing the formation of 3-phosphoglycerate from ribulose 1,5-biphosphate and CARBON DIOXIDE. It can also utilize OXYGEN as a substrate to catalyze the synthesis of 2-phosphoglycolate and 3-phosphoglycerate in a process referred to as photorespiration.
Phosphoribosyl Pyrophosphate
Clostridium sticklandii
Transketolase
Spectrum Analysis
Alkynes
Pyrophosphatases
Oxygen Isotopes
Epoxy Compounds
Carbon-Nitrogen Ligases
Hydrogenation
Carbon-Carbon Lyases
Chromatography, Gel
Alkyl and Aryl Transferases
4-Hydroxybenzoate-3-Monooxygenase
Copper
Decarboxylation
Calorimetry
The measurement of the quantity of heat involved in various processes, such as chemical reactions, changes of state, and formations of solutions, or in the determination of the heat capacities of substances. The fundamental unit of measurement is the joule or the calorie (4.184 joules). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Human topoisomerase I promotes initiation of simian virus 40 DNA replication in vitro. (1/16180)
Addition of purified human topoisomerase I (topo I) to simian virus 40 T antigen-driven in vitro DNA replication reactions performed with topo I-deficient extracts results in a greater than 10-fold stimulation of completed molecules as well as a more than 3-fold enhancement of overall DNA replication. To further characterize this stimulation, we first demonstrate that bovine topo I but not Escherichia coli topo I can also enhance DNA replication. By using several human topo I mutants, we show that a catalytically active form of topo I is required. To delineate whether topo I influences the initiation or the elongation step of replication, we performed delayed pulse, pulse-chase, and delayed pulse-chase experiments. The results illustrate that topo I cannot promote the completion of partially replicated molecules but is needed from the beginning of the reaction to initiate replication. Competitive inhibition experiments with the topo I binding T antigen fragment 1-246T and a catalytically inactive topo I mutant suggest that part of topo I's stimulation of replication is mediated through a direct interaction with T antigen. Collectively, our data indicate that topo I enhances the synthesis of fully replicated DNA molecules by forming essential interactions with T antigen and stimulating initiation. (+info)A novel H2A/H4 nucleosomal histone acetyltransferase in Tetrahymena thermophila. (2/16180)
Recently, we reported the identification of a 55-kDa polypeptide (p55) from Tetrahymena macronuclei as a catalytic subunit of a transcription-associated histone acetyltransferase (HAT A). Extensive homology between p55 and Gcn5p, a component of the SAGA and ADA transcriptional coactivator complexes in budding yeast, suggests an immediate link between the regulation of chromatin structure and transcriptional output. Here we report the characterization of a second transcription-associated HAT activity from Tetrahymena macronuclei. This novel activity is distinct from complexes containing p55 and putative ciliate SAGA and ADA components and shares several characteristics with NuA4 (for nucleosomal H2A/H4), a 1.8-MDa, Gcn5p-independent HAT complex recently described in yeast. A key feature of both the NuA4 and Tetrahymena activities is their acetylation site specificity for lysines 5, 8, 12, and 16 of H4 and lysines 5 and 9 of H2A in nucleosomal substrates, patterns that are distinct from those of known Gcn5p family members. Moreover, like NuA4, the Tetrahymena activity is capable of activating transcription from nucleosomal templates in vitro in an acetyl coenzyme A-dependent fashion. Unlike NuA4, however, sucrose gradient analyses of the ciliate enzyme, following sequential denaturation and renaturation, estimate the molecular size of the catalytically active subunit to be approximately 80 kDa, consistent with the notion that a single polypeptide or a stable subcomplex is sufficient for this H2A/H4 nucleosomal HAT activity. Together, these data document the importance of this novel HAT activity for transcriptional activation from chromatin templates and suggest that a second catalytic HAT subunit, in addition to p55/Gcn5p, is conserved between yeast and Tetrahymena. (+info)Pseudouridine mapping in the Saccharomyces cerevisiae spliceosomal U small nuclear RNAs (snRNAs) reveals that pseudouridine synthase pus1p exhibits a dual substrate specificity for U2 snRNA and tRNA. (3/16180)
Pseudouridine (Psi) residues were localized in the Saccharomyces cerevisiae spliceosomal U small nuclear RNAs (UsnRNAs) by using the chemical mapping method. In contrast to vertebrate UsnRNAs, S. cerevisiae UsnRNAs contain only a few Psi residues, which are located in segments involved in intermolecular RNA-RNA or RNA-protein interactions. At these positions, UsnRNAs are universally modified. When yeast mutants disrupted for one of the several pseudouridine synthase genes (PUS1, PUS2, PUS3, and PUS4) or depleted in rRNA-pseudouridine synthase Cbf5p were tested for UsnRNA Psi content, only the loss of the Pus1p activity was found to affect Psi formation in spliceosomal UsnRNAs. Indeed, Psi44 formation in U2 snRNA was abolished. By using purified Pus1p enzyme and in vitro-produced U2 snRNA, Pus1p is shown here to catalyze Psi44 formation in the S. cerevisiae U2 snRNA. Thus, Pus1p is the first UsnRNA pseudouridine synthase characterized so far which exhibits a dual substrate specificity, acting on both tRNAs and U2 snRNA. As depletion of rRNA-pseudouridine synthase Cbf5p had no effect on UsnRNA Psi content, formation of Psi residues in S. cerevisiae UsnRNAs is not dependent on the Cbf5p-snoRNA guided mechanism. (+info)Molecular dynamics of the sodium channel pore vary with gating: interactions between P-segment motions and inactivation. (4/16180)
Disulfide trapping studies have revealed that the pore-lining (P) segments of voltage-dependent sodium channels undergo sizable motions on a subsecond time scale. Such motions of the pore may be necessary for selective ion translocation. Although traditionally viewed as separable properties, gating and permeation are now known to interact extensively in various classes of channels. We have investigated the interaction of pore motions and voltage-dependent gating in micro1 sodium channels engineered to contain two cysteines within the P segments. Rates of catalyzed internal disulfide formation (kSS) were measured in K1237C+W1531C mutant channels expressed in oocytes. During repetitive voltage-clamp depolarizations, increasing the pulse duration had biphasic effects on the kSS, which first increased to a maximum at 200 msec and then decreased with longer depolarizations. This result suggested that occupancy of an intermediate inactivation state (IM) facilitates pore motions. Consistent with the known antagonism between alkali metals and a component of slow inactivation, kSS varied inversely with external [Na+]o. We examined the converse relationship, namely the effect of pore flexibility on gating, by measuring recovery from inactivation in Y401C+E758C (YC/EC) channels. Under oxidative conditions, recovery from inactivation was slower than in a reduced environment in which the spontaneous YC/EC cross-link is disrupted. The most prominent effects were slowing of a component with intermediate recovery kinetics, with diminution of its relative amplitude. We conclude that occupancy of an intermediate inactivation state facilitates motions of the P segments; conversely, flexibility of the P segments alters an intermediate component of inactivation. (+info)Phosphorylation by protein kinase C decreases catalytic activity of avian phospholipase C-beta. (5/16180)
The potential role of protein kinase C (PKC)-promoted phosphorylation has been examined in the G-protein-regulated inositol lipid signalling pathway. Incubation of [32P]Pi-labelled turkey erythrocytes with either the P2Y1 receptor agonist 2-methylthioadenosine triphosphate (2MeSATP) or with PMA resulted in a marked increase in incorporation of 32P into the G-protein-activated phospholipase C PLC-betaT. Purified PLC-betaT also was phosphorylated by PKC in vitro to a stoichiometry (mean+/-S. E.M.) of 1.06+/-0.2 mol of phosphate/mol of PLC-betaT. Phosphorylation by PKC was isoenzyme-specific because, under identical conditions, mammalian PLC-beta2 also was phosphorylated to a stoichiometry near unity, whereas mammalian PLC-beta1 was not phosphorylated by PKC. The effects of PKC-promoted phosphorylation on enzyme activity were assessed by reconstituting purified PLC-betaT with turkey erythrocyte membranes devoid of endogenous PLC activity. Phosphorylation resulted in a decrease in basal activity, AlF4(-)-stimulated activity, and activity stimulated by 2MeSATP plus guanosine 5'-[gamma-thio]triphosphate in the reconstituted membranes. The decreases in enzyme activities were proportional to the extent of PKC-promoted phosphorylation. Catalytic activity assessed by using mixed detergent/phospholipid micelles also was decreased by up to 60% by phosphorylation. The effect of phosphorylation on Gqalpha-stimulated PLC-betaT in reconstitution experiments with purified proteins was not greater than that observed on basal activity alone. Taken together, these results illustrate that PKC phosphorylates PLC-betaT in vivo and to a physiologically relevant stoichiometry in vitro. Phosphorylation is accompanied by a concomitant loss of enzyme activity, reflected as a decrease in overall catalytic activity rather than as a specific modification of G-protein-regulated activity. (+info)Regulation and function of family 1 and family 2 UDP-glucuronosyltransferase genes (UGT1A, UGT2B) in human oesophagus. (6/16180)
Human UDP-glucuronosyltransferases (UGTs) are expressed in a tissue-specific fashion in hepatic and extrahepatic tissues [Strassburg, Manns and Tukey (1998) J. Biol. Chem. 273, 8719-8726]. Previous work suggests that these enzymes play a protective role in chemical carcinogenesis [Strassburg, Manns and Tukey (1997) Cancer Res. 57, 2979-2985]. In this study, UGT1 and UGT2 gene expression was investigated in human oesophageal epithelium and squamous-cell carcinoma in addition to the characterization of individual UGT isoforms using recombinant protein. UGT mRNA expression was characterized by duplex reverse transcriptase-PCR analysis and revealed the expression of UGT1A7, UGT1A8, UGT1A9 and UGT1A10 mRNAs. UGT1A1, UGT1A3, UGT1A4, UGT1A5 and UGT1A6 transcripts were not detected. UGT2 expression included UGT2B7, UGT2B10 and UGT2B15, but UGT2B4 mRNA was absent. UGT2 mRNA was present at significantly lower levels than UGT1 transcripts. This observation was in agreement with the analysis of catalytic activities in oesophageal microsomal protein, which was characterized by high glucuronidation rates for phenolic xenobiotics, all of which are classical UGT1 substrates. Whereas UGT1A9 was not regulated, differential regulation of UGT1A7 and UGT1A10 mRNA was observed between normal oesophageal epithelium and squamous-cell carcinoma. Expression and analysis in vitro of recombinant UGT1A7, UGT1A9, UGT1A10, UGT2B7 and UGT2B15 demonstrated that UGT1A7, UGT1A9 and UGT1A10 catalysed the glucuronidation of 7-hydroxybenzo(alpha)pyrene, as well as other environmental carcinogens, such as 2-hydroxyamino-1-methyl-6-phenylimidazo-(4, 5-beta)-pyridine. Although UGT1A9 was not regulated in the carcinoma tissue, the five-fold reduction in 7-hydroxybenzo(alpha)pyrene glucuronidation could be attributed to regulation of UGT1A7 and UGT1A10. These data elucidate an individual regulation of human UGT1A and UGT2B genes in human oesophagus and provide evidence for specific catalytic activities of individual human UGT isoforms towards environmental carcinogens that have been implicated in cellular carcinogenesis. (+info)Melatonin biosynthesis: the structure of serotonin N-acetyltransferase at 2.5 A resolution suggests a catalytic mechanism. (7/16180)
Conversion of serotonin to N-acetylserotonin, the precursor of the circadian neurohormone melatonin, is catalyzed by serotonin N-acetyltransferase (AANAT) in a reaction requiring acetyl coenzyme A (AcCoA). AANAT is a globular protein consisting of an eight-stranded beta sheet flanked by five alpha helices; a conserved motif in the center of the beta sheet forms the cofactor binding site. Three polypeptide loops converge above the AcCoA binding site, creating a hydrophobic funnel leading toward the cofactor and serotonin binding sites in the protein interior. Two conserved histidines not found in other NATs are located at the bottom of the funnel in the active site, suggesting a catalytic mechanism for acetylation involving imidazole groups acting as general acid/base catalysts. (+info)Histone octamer transfer by a chromatin-remodeling complex. (8/16180)
RSC, an abundant, essential chromatin-remodeling complex related to SWI/SNF complex, catalyzes the transfer of a histone octamer from a nucleosome core particle to naked DNA. The newly formed octamer-DNA complex is identical with a nucleosome in all respects. The reaction requires ATP and involves an activated RSC-nucleosome intermediate. The mechanism may entail formation of a duplex displacement loop on the nucleosome, facilitating the entry of exogeneous DNA and the release of the endogenous molecule. (+info)Effects on general acid catalysis from mutations of the invariant tryptophan and arginine residues in the protein tyrosine...
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CataLysis - CRC Network started off with an Online Conference - Collaborative Research Center 1333
Sol-gel synthesis, characterization, optical properties and catalytic performance of Y2Ce2O7 nanomaterial
US2378531A - Catalytic conversion of residual hydrocarbon oils - Google Patents
The Best of Both Catalytic Worlds
Defects in nanosilica catalytically convert CO2 to methane without any metal and ligand | PNAS
Modeling of Injected Diesel Fuel Conversion and Heat Release in Oxidation Catalyst: 3D-CFD & 1D Channels Approach - SAE...
DOE Award No. DE-FC36-03GO13108 NOVEL NON-PRECIOUS METAL CATALYSTS FOR PEMFC: CATALYST SELECTION THROUGH MOLECULAR MODELING AND...
Catalyst development in the context of ring expansion-addition of carbon dioxide to epoxides to give organic carbonates -...
Influence of Preparation Parameters on the Performance of Colloid-derived Oxidic Palladium Catalysts for Selective...
REIT - Catalysts for methanol steam reforming-A review
Review of Enantioselective Homogeneous Supported Catalysis edited by Radovan Šebesta.<...
Catalytic triad - Wikipedia
Iron-based nanocatalyst for the acceptorless dehydrogenation reactions | Nature Communications
Catalysis
... may be classified as either homogeneous or heterogeneous. A homogeneous catalysis is one whose components are ... Portals: Chemistry Biology Chemical reaction Substrate Reagent Enzyme Product Abzyme Acid catalysis (includes Base catalysis) ... a Father of Catalysis". ACS Catalysis. 8 (9): 8531-39. doi:10.1021/acscatal.8b02310. Dhara SS; Umare SS (2018). A Textbook of ... The Bioorganic Chemistry of Enzymatic Catalysis Wiley-Interscience, Hoboken, U.S. ISBN 0-471-05991-9 Look up catalysis in ...
Synergistic catalysis
... is a specialized approach to catalysis whereby at least two different catalysts act on two different ... Swiegers, Gerhard F. (2008). Mechanical catalysis : methods of enzymatic, homogeneous, and heterogeneous catalysis ([Online ... Xu, H.; Zuend, S. J.; Woll, M. G.; Tao, Y.; Jacobsen, E. N. (18 February 2010). "Asymmetric Cooperative Catalysis of Strong ... Besides using two transition metal catalysts, synergistic catalysis can also be carried out by utilizing one transition metal ...
Catalysis Letters
... is a peer-reviewed scientific journal covering research on catalysis in a wide range of sub-disciplines such ... as homogeneous, heterogeneous and enzymatic catalysis. It was previously published by Baltzer Science Publishers, which was ...
Shuttle catalysis
... sulfenium have also been shuttled under this catalysis platform. Bhawal, Benjamin N.; Morandi, Bill (2017). "Shuttle Catalysis- ... Shuttle catalysis is used to describe catalytic reactions where a chemical entity of a donor molecule is transferred to an ... In 1999, Chul-Ho Jun and Hyuk Lee reported the first example of hydroacylation through shuttle catalysis. In this example, 3- ... Bhawal, Benjamin N.; Morandi, Bill (2016-11-04). "Catalytic Transfer Functionalization through Shuttle Catalysis". ACS ...
Heterogeneous catalysis
In chemistry, heterogeneous catalysis is catalysis where the phase of catalysts differs from that of the reactants or products ... 2004). Aqueous-Phase Organometallic Catalysis: Concepts and Applications. Wiley-VCH. Media related to Heterogeneous catalysis ... "From the Sabatier principle to a predictive theory of transition-metal heterogeneous catalysis". Journal of Catalysis. 328: 36- ... In heterogeneous catalysis, when a reactant molecule physisorbs to a catalyst, it is commonly said to be in a precursor state, ...
Acid catalysis
Two kinds of acid catalysis are recognized, specific acid catalysis and general acid catalysis. In specific acid catalysis, ... In acid catalysis and base catalysis, a chemical reaction is catalyzed by an acid or a base. By Brønsted-Lowry acid-base theory ... Many enzymes operate by general catalysis. Acid catalysis is mainly used for organic chemical reactions. Many acids can ... This kind of catalysis is common for strong acids in polar solvents, such as water. S + AH ⟶ SH + + A − {\displaystyle {\ce {S ...
Magnetic catalysis
... is a physics phenomenon, which is defined as an enhancement of dynamical symmetry breaking by an external ... Commonly, the magnetic catalysis is specifically associated with spontaneous breaking of flavor or chiral symmetry in quantum ... Recently, there was an increased activity to cross-check the effects of magnetic catalysis in the limit of a large number of ... The additional quantum Hall plateaus develop at ν=0, ν=±1, ν=±3 and ν=±4. The mechanism of magnetic catalysis in a relativistic ...
Supramolecular catalysis
... is not a well-defined field but it generally refers to an application of supramolecular chemistry, ... Three common modes of catalysis are described here. A supramolecular host could bind to a guest molecule in such a way that the ... Supramolecular catalysis has not yet made significant contribution in the area of industrial chemistry or synthetic methodology ... van Leeuwen, P. W. N. M. (2008). Supramolecular Catalysis. Weinheim: Wiley-VCH Verlag GmbH & Co. KGaA. ISBN 978-3-527-32191-9. ...
Photoredox catalysis
... catalysis. SOMO catalysis employs superstoichiometric ceric ammonium nitrate (CAN) to oxidize the catalytically-generated ... Photoredox catalysis is a branch of photochemistry that uses single-electron transfer. Photoredox catalysts are generally drawn ... The use of photoredox catalysis to generate reactive heteroatom-centered radicals was first explored in the 1990s. [Ru(bipy)3] ... In addition to the thermally-forbidden [2+2] cycloaddition, photoredox catalysis can be applied to the [4+2] cyclization (Diels ...
Plasmonic catalysis
In chemistry, plasmonic catalysis is a type of catalysis that uses plasmons to increase the rate of a chemical reaction. A ... Broadly speaking, plasmonic catalysis increases the reaction rate through two major pathways. The first of these is through the ... Plasmonic Catalysis: From Fundamentals to Applications. Pedro H.C. Camargo and Emiliano Cortés (Editors), 352 pages, ISBN 3-527 ... Plasmon-Driven Catalysis on Molecules and Nanomaterials. Accounts of Chemical Research 2019; 52 (9): 2506-2515. Brongersma, M. ...
Enzyme catalysis
A key feature of enzyme catalysis over many non-biological catalysis, is that both acid and base catalysis can be combined in ... Important factors in enzyme catalysis include general acid and base catalysis, orbital steering, entropic restriction, ... and their role as vitamins is directly linked to their use in the catalysis of biological process within metabolism. Catalysis ... and such effects do not contribute significantly to catalysis. A metal ion in the active site participates in catalysis by ...
Nature Catalysis
... is a monthly peer-reviewed scientific journal published by Nature Research. It was established in 2018. The ... "Nature Catalysis". MIAR: Information Matrix for the Analysis of Journals. University of Barcelona. Retrieved 2022-05-31. " ...
Homogeneous catalysis
In chemistry, homogeneous catalysis is catalysis by a soluble catalyst in a solution. Homogeneous catalysis refers to reactions ... Water is a common reagent in enzymatic catalysis. Esters and amides are slow to hydrolyze in neutral water, but the rates are ... In contrast, heterogeneous catalysis describes processes where the catalysts and substrate are in distinct phases, typically ... Homogeneous catalysis is an established technology that continues to evolve. An illustrative major application is the ...
Heterobimetallic catalysis
... is an approach to catalysis that employs two different metals to promote a chemical reaction. ... The combination of photoredox catalysis with traditional transition metal catalysis enables the use of visible light to drive ... Logan, K. M.; Smith, K. B.; You, W.; Brown, M. K. (April 2015). "Copper/Palladium Synergistic Catalysis for the syn‐ and anti‐ ... Jia, T.; Cao, P.; Wang, B.; Lou, Yazhou; Yin, X.; Wang, M.; Liao, J. (October 2015). "A Cu/Pd Cooperative Catalysis for ...
ACS Catalysis
"Source details: ACS Catalysis". Scopus Preview. Elsevier. Retrieved 2021-09-13. "ACS Catalysis". 2020 Journal Citation Reports ... Crudden, Cathleen M. (2021-05-21). "Charting the Next Phase of ACS Catalysis". ACS Catalysis. 11 (10): 6153-6154. doi:10.1021/ ... ACS Catalysis is a monthly peer-reviewed scientific journal established in 2011 by the American Chemical Society. The journal ... "About the journal". ACS Catalysis. American Chemical Society. July 2012. Retrieved 2012-07-20. ...
Hydrogen-bond catalysis
It is often difficult to distinguish between hydrogen-bond catalysis and general acid catalysis. Hydrogen-bond donors can have ... Link Hydrogen Bonding in Asymmetric Catalysis. Leighton Group Meeting Presentation by Uttam Tambar. Link Asymmetric Catalysis ... as well as engage in anion-binding catalysis. Bifunctional urea and thiourea catalysis are abundant in the literature. ... This mode of catalysis is found in the active sites of many enzymes, such as the serine proteases. In this example, the amide ...
Lewis acid catalysis
In Lewis acid catalysis of organic reactions, a metal-based Lewis acid acts as an electron pair acceptor to increase the ... Lewis acid catalysis has been used in the asymmetry-setting step for the syntheses of many natural products. The first reaction ... Asymmetric catalysis by Lewis acids rely on catalysts with chiral ligands coordinated to the metal center. Over the years, a ... Enantioselective Catalysis of the Glyoxylate−Ene Reaction". Journal of the American Chemical Society. 120 (23): 5824-5825. doi: ...
Heterogeneous gold catalysis
... refers to the catalysis of chemical reactions by gold, typically supported on metal oxide ... and support-dependency in the catalysis of gold". Catalysis Today. 36 (1): 153-166. doi:10.1016/s0920-5861(96)00208-8. Haruta, ... Very recently, there has been a lot of developments in gold catalysis for the synthesis of organic molecules including the C-C ... Within heterogeneous catalysis, reactants adsorb onto the surface of the catalyst thus forming activated intermediates. However ...
Phase-boundary catalysis
Materials with applications for catalysis in immiscible liquid-liquid system, Reaction Kinetics and Catalysis Letters[dead link ... Phase-transfer catalyst H. Nur, S. Ikeda and B. Ohtani, Phase-boundary catalysis: a new approach in alkene epoxidation with ... Abstract H. Nur, S. Ikeda and B. Ohtani, Phase-boundary catalysis of alkene epoxidation with aqueous hydrogen peroxide using ... The reaction medium of phase boundary catalysis systems for the catalytic reaction of immiscible aqueous and organic phases ...
Concurrent tandem catalysis
This technique has been deployed in tandem alkane-dehydrogenation-olefin-metathesis catalysis Recently, tandem catalysis ... This type of catalysis allows for the functionalization of simple alkenes into aldehydes and gives a remarkably useful handle ... Orthogonal tandem catalysis is a "one-pot reaction in which sequential catalytic processes occur through two or more ... Concurrent tandem catalysis (CTC) is a technique in chemistry where multiple catalysts (usually two) produce a product ...
Catalysis Science & Technology
... covers both the science of catalysis and catalysis technology, including applications addressing ... "About Catalysis Science & Technology". Royal Society of Chemistry. Retrieved 2 February 2015. "New Journal: Catalysis Science ... "Catalysis Science and Technology Journal Policy". Retrieved 2 February 2015. "Catalysis Science & Technology". Master Journal ... Chemistry portal Catalysis Science & Technology is a peer-reviewed scientific journal that is published monthly by the Royal ...
Applied Catalysis Award
Source: RSC List of chemistry awards "Applied Catalysis Award". "Applied Catalysis Award 2014 Winner". Royal Society of ... The Applied Catalysis Award is awarded by the Royal Society of Chemistry to individuals for "creativity and excellence in novel ... "Applied Catalysis Award Previous Winners". "Dr Thomas J. Colacot". "Dr Martyn V. Twigg". (Articles lacking reliable references ... approaches or use of catalysis in industry." The award was established in 2008. The winner of the award is chosen by the ...
Water oxidation catalysis
... (WOC) is the acceleration (catalysis) of the conversion of water into oxygen and protons: 2 H2O → 4 ... "Half-Sandwich Iridium Complexes for Homogeneous Water-Oxidation Catalysis". Journal of the American Chemical Society. 132 (45 ...
Journal of Catalysis
The Journal of Catalysis is a monthly peer-reviewed scientific journal covering research on all aspects of heterogeneous and ... "Journal of Catalysis". 2021 Journal Citation Reports. Web of Science (Science ed.). Thomson Reuters. 2022. Official website ( ... "Editorial Board - Journal of Catalysis - Journal - Elsevier". journals.elsevier.com. Retrieved 2021-08-02. " ... homogeneous catalysis. It is published by Elsevier and it was established in 1962 by Jan Hendrik de Boer and P. W. Selwood. The ...
Brønsted catalysis equation
Specific and general catalysis is also found in base catalysed reactions and base Brønsted equation also exists with constant β ... The Brønsted catalysis equation or law of correlation, after Johannes Nicolaus Brønsted, gives the relationship between acid ... strength and catalytic activity in general acid catalysis. log k = α ∗ log ( K a ) + C {\displaystyle \ \log k=\alpha *\log ...
Boreskov Institute of Catalysis
Fundamentals for the preparation of catalysts; basis of homogeneous, heterogeneous catalysis, as well as catalysis with enzymes ... The Institute of Catalysis was founded in the summer of 1958 as part of the Siberian Branch of the USSR Academy of Sciences. ... Boreskov Institute of Catalysis of the Siberian Branch of the RAS, BIC (Russian: Институт катализа имени Г. К. Борескова ... Federal Research Center Boreskov Institute of Catalysis. SB RAS. (Articles containing Russian-language text, Russia articles ...
Applied Catalysis A: General
... is a peer-reviewed scientific journal covering catalytic science and its applications. It is ... "Applied Catalysis A: General". 2020 Journal Citation Reports. Web of Science (Science ed.). Thomson Reuters. 2021. Official ...
Electrochemical promotion of catalysis
The electrochemical promotion of catalysis (EPOC) effect in the realm of chemistry refers to the pronounced enhancement of ... The EPOC effect has been evaluated as an important phenomenon which can closely link electrocatalysis and thermal catalysis. ... Katsaounis, A. (2010-05-01). "Recent developments and trends in the electrochemical promotion of catalysis (EPOC)". Journal of ... Articles to be merged from May 2022, All articles to be merged, Electrochemistry, Catalysis). ...
Asymmetric counteranion directed catalysis
... (ACDC) or chiral anion catalysis in enantioselective synthesis is the "induction of ... Hence, some authors may exclude ion pair formation by proton transfer as a type of chiral counteranion catalysis. The ... For a discussion about chiral Brønsted acid catalyzed reactions, see the article on hydrogen bond catalysis.) The concept of ... Although chiral Brønsted acid catalyzed reactions may well fall into this category of catalysis under the definition given here ...
Unifying Systems in Catalysis
The mission of this doctoral program is to overcome the limits of the classic disciplines in catalysis. Catalysis research also ... Unifying Concepts in Catalysis). UniSysCat aims at deciphering reaction networks in chemical and biological catalysis so that ... The term EC2/BIG-NSE is made up of the terms EC² (Einstein Center of Catalysis) and BIG-NSE (Berlin International Graduate ... Since January 1st, 2019, the BIG-NSE doctoral program has been financed by the "Einstein Center of Catalysis" sponsored by the ...
Cell Press: Chem Catalysis
Chem Catalysis is a new premier journal from Cell Press publishing innovative research on fundamental and applied catalysis. ... Chem Catalysis. Meet the editors!. Get to know the editorial team behind Chem Catalysis. ... Chem Catalysis-the first field-focused journal from the award-winning Cell Press chemistry title Chem- is a premier journal ... Request ongoing access to Chem Catalysis Complimentary access ends June 1, 2022. For full ongoing access, recommend Chem ...
Graphene-based nanomaterial catalysis | EurekAlert!
Graphene-based nanomaterial catalysis. Bentham Science Publishers. DOI. 10.2174/97898150404941220101. Keywords. * /Physical ... Graphene-Based Nanomaterial Catalysis compiles knowledge about catalytic graphene-based nanomaterials in a single easy-to-read ... nanotecatalysis, Electro catalysis, Electro-organic synthesis, Fuel cells, Graphene Oxide, Metal doped grapheme, Electro ... Her research interests are largely based in electro analytical chemistry, modified electrodes, electro-/organic catalysis and ...
Competence Centre for Catalysis
| Chalmers
Competence Centre for Catalysis. The Competence Centre for Catalysis, KCK, Period 2014-2017 is a four-year research program, ... Professor, Chemical Physics, Department of Physics Competence Centre for Catalysis I am working within Computational catalysis ... My main research fields are catalysis for energy conversion and emission control. By developing new catalytic materials and ... Anders Hellman is a theoretical physicist that works within the field of surface science, heterogeneous catalysis and materials ...
Catalysis
Handbook of Coordination Catalysis in Organic Chemistry - 1st Edition
Purchase Handbook of Coordination Catalysis in Organic Chemistry - 1st Edition. Print Book & E-Book. ISBN 9780408107761, ... Handbook of Coordination Catalysis in Organic Chemistry presents the increasing importance of homogeneous catalysis by metal ... Handbook of Coordination Catalysis in Organic Chemistry. Holiday Sale. :. Save up to 25% on print and eBooks with FREE shipping ... There are currently no reviews for Handbook of Coordination Catalysis in Organic Chemistry ...
Supramolecular Chemistry and Catalysis at TU/e
Open Access Data
Cardiff Catalysis Institute. We are improving the understanding of catalysis, developing new catalytic processes with industry ... Visit the Cardiff Catalysis Institute. Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, ... and promoting the use of catalysis as a sustainable 21st century technology. ...
Employees - Catalysis (KinCat) - NTNU
Samuel Konrad Regli, PhD Candidate / Senior Engineer Catalysis Group +47 73594182 [email protected] ...
Advanced Nanomaterials for Catalysis: Synthesis, Characterization, and Application | Hindawi
Advanced Nanomaterials for Catalysis: Synthesis, Characterization, and Application - A Special Issue published by Hindawi ... Advanced Nanomaterials for Catalysis: Synthesis, Characterization, and Application. Xianwen Zhang , Xin Zhang , ... , Maofeng ... Synthesis, characterization, and applications of functional materials for catalysis. *Morphology controlled synthesis and ...
Environment and Catalysis (134519) | Catalytic Processes and Materials (CPM)
UTFacultiesTNWClustersResearch groupsCPMInfo for StudentsCourse OverviewEnvironment and Catalysis (134519) ... UTFacultiesTNWClustersResearch groupsCPMInfo for StudentsCourse OverviewEnvironment and Catalysis (134519) ... Catalysis, by minimizing pollution, provides two ways to improve quality of our environment. These are: 1) development of ... In this course, the role of catalysis in both these situations will be discussed especially with the use of examples that cause ...
Polymer Synthesis/Polymer Catalysis by B. Ameduri, M. Arndt | Waterstones
Buy Polymer Synthesis/Polymer Catalysis by B. Ameduri, M. Arndt from Waterstones today! Click and Collect from your local ... Polymer Synthesis/Polymer Catalysis - Advances in Polymer Science 127 (Hardback). B. Ameduri (author of contributions), M. ... in the Advances in Polymer Science series and it contains four essays dealing with aspects of polymer synthesis and catalysis. ...
Vinnova | financed projects in Chemistry and Catalysis | Vinnova
Get inspired by previously approved projects within Chemistry and Catalysis. , Vinnova ... Chemistry and Catalysis. Here you can see ongoing and completed projects financed by Vinnova within the application area ... Chemistry and Catalysis. This web page has been machine translated. If there are any uncertainties, please refer to the Swedish ...
Catalyst deactivation via decomposition into single atoms and the role of metal loading | Nature Catalysis
DE-AC02-76SF00515 to the SUNCAT Center for Interface Science and Catalysis. E.D.G. acknowledges support from the National ... Institute of Catalysis Research and Technology, Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany ... Department of Chemical Engineering and SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, CA, ...
Catalysis | College of Chemistry
11 Catalysis Chemistry Pioneers Every Researcher Should Know About. February 3, 2020 ... The 2021 Eastman Lectures in Catalysis features speakers Professor Regina Palkovit, RWTH Aachen University, Aachen/Germany; , ... Current pioneering research includes premier programs in catalysis, thermodynamics, chemical biology, atmospheric chemistry, ... Read more about 11 Catalysis Chemistry Pioneers Every Researcher Should Know About ...
Citation Form | ACS-CATALYSIS | Performance | Citation Machine
Solar Fuels / Catalysis - Helmholtz-Zentrum Berlin (HZB)
Solar fuels and catalysis: Light is able to split water molecules, producing oxygen and hydrogen. This hydrogen gas can be ... Solar Fuels / Catalysis. We are developing materials that use solar energy to convert water into hydrogen. PECSYS Laboratory in ... Catalysis and conversion of carbon dioxide into chemical feedstock. Reducing emissions of climate-damaging carbon dioxide (CO2 ... The aim is to improve energy efficiency, reaction speed and yield in CO2 catalysis. ...
Ribozyme Catalysis of Metabolism in the RNA World | Semantic Scholar
2209.15213] Catalysis in Action via Elementary Thermal Operations
XANES in heterogeneous catalysis | Stanford Synchrotron Radiation Lightsource
Applications of XANES in heterogeneous catalysis using qualitative analysis c) X-ray spectromicroscopy under in-situ conditions ... Utrecht University Applications of XANES in the field of heterogeneous catalysis will be discussed, including: a) An ... Applications of XANES in the field of heterogeneous catalysis will be discussed, including:. a) An introduction to X-ray ... b) Applications of XANES in heterogeneous catalysis using qualitative analysis. c) X-ray spectromicroscopy under in-situ ...
Homogeneous Catalysis -
Chemgapedia
Asymmetric aza-Henry reaction under phase transfer catalysis: An experimental and theoretical study - Zurich Open Repository...
Physical Sciences , Catalysis Physical Sciences , General Chemistry Life Sciences , Biochemistry Physical Sciences , Colloid ... Asymmetric aza-Henry reaction under phase transfer catalysis: An experimental and theoretical study ... Download PDF Asymmetric aza-Henry reaction under phase transfer catalysis: An experimental and theoretical study. Item ... Asymmetric aza-Henry reaction under phase transfer catalysis: An experimental and theoretical study. Journal of the American ...
In-Mouse Catalysis - ChemistryViews
In-Mouse Catalysis. Author: Angewandte Chemie International Edition. Organ-Targeted Gold Catalysis. A gold catalyst can be ... In Vivo Gold Complex Catalysis within Live Mice,. Kazuki Tsubokura, Kenward K. H. Vong, Ambara R. Pradipta, Akihiro Ogura, ... It could make organometallic catalysis applicable for therapy or diagnostics.. How is a therapeutically useful catalyst guided ... strong fluorescence in the two organs demonstrated successful in vivo gold catalysis. Thus, a catalytically active gold complex ...
Journal Rankings on Catalysis
Catalysis, Structure and Reactivity. journal. 0.305 Q4. 14. 0. 6. 0. 7. 6. 0.00. 0.00. ... Catalysis Science and Technology. journal. 1.299 Q1. 125. 704. 1977. 44673. 11784. 1972. 5.69. 63.46. ... RSC Catalysis Series. book series. 0.130 Q4. 10. 40. 185. 3805. 44. 1. 0.31. 95.13. ... Catalysis. book series. 0.249 Q4. 13. 14. 28. 1689. 28. 17. 1.05. 120.64. ...
Directory - North American Catalysis Society
Catalysis and Chiral Chemistry Key Topics at Informex
... and several exhibitors at this years Informex highlighted their recent advances in catalysis, biocatalysis, and chiral ... Catalysis and Chiral Chemistry Key Topics at Informex. .social-ris-container { display: flex; justify-content: space-between ... and several exhibitors at this years Informex highlighted their recent advances in catalysis, biocatalysis, and chiral ... and several exhibitors at this years Informex highlighted their recent advances in catalysis, biocatalysis, and chiral ...
Begell House - Catalysis in Green Chemistry and Engineering
Eco-friendly Catalysis and Energy Lab, Department of Chemical Engineering, Ulsan National Institute of Science and Technology ( ... National Centre for Catalysis Research and Department of Chemistry, Indian Institute of Technology-Madras, Chennai 600036, ... Catalysis and Chemical Reaction Engineering Laboratory, Department of Chemical and Biological Engineering, University of ... Inicio Portal Digitalde Begell Revistas Catalysis in Green Chemistry and Engineering Consejo Editorial ...
Phonon catalysis could lead to a new field
... by Mary Beth Gallagher, Massachusetts Institute of Technology ... This new approach-which the team refers to as "phonon catalysis"-could lead to an entirely new field of research. Their work ... Henry believes this method could lead to the creation of a new research field-one he refers to as "phonon catalysis." While the ... Henry and his team have begun exploring potential applications for phonon catalysis. Gordiz has been looking at using the ...
talks.cam : Enhancing Rubisco Catalysis Improves Plant Growth
HeterogeneousCatalysts2021Palladium catalysisAsymmetric CatalysisGeneral acid catalysisChemistryEnzymeAreas of catalysisSynthesisHomogeneousCentreNanomaterialsPhotoredox catalysisCatalytic20162020OxidationOrganometallicReactionsResearchEnvironmentalCatalystMolecularAcidHttpsSeparationChemical biologyScienceYieldDerivativesRoleApplicationsEfficiency
Heterogeneous6
- The major research areas in this cluster are reactor and separation technology, process intensification, and molecular heterogeneous catalysis. (tue.nl)
- With mentoring, the candidate will conduct research in heterogeneous catalysis for the fundamental understating of the activation of small molecules. (postdocjobs.com)
- Succi S, Smith G, Gabrielli A, Kaxiras E. Chemical efficiency of reactive microflows with heterogeneous catalysis a lattice Boltzmann study . (harvard.edu)
- Recent advances in computational models of solvent and electrolyte environments have opened the possibility of characterizing heterogeneous catalysis and electrochemistry in a first-principles-based framework, where the multiscale nature of the developed approaches provides a significant reduction of the computational burden while retaining a good accuracy. (caltech.edu)
- Photosynthetic Fixation of CO2 in Alkenes by Heterogeneous Photoredox Catalysis with Visible Light. (bvsalud.org)
- Pioneering the field of highly selective heterogeneous nanoparticle catalysts Associate Professor Søren Kegnæs from Centre for Catalysis and Sustainable Chemistry at DTU. (dtu.dk)
Catalysts4
- We bring communities of researchers together-from multiple disciplines in both academia and industry-to advance our understanding of existing systems, expand the current knowledge with novel catalysts, and connect fundamental catalysis insight with the real world for the benefit of society. (cell.com)
- Business Area Catalysis includes Business Unit Catalysts and Business Line Biofuels & Derivatives contributing significantly to value creation in our customers' operations, ensuring that finite raw materials and energy are used efficiently and effectively , ensuring quality and yield of processes. (clariant.com)
- This review provides a critical survey of the main approaches being pursued to address this issue, including low-loading catalysis, recyclable catalysts and the use of palladium recovered from secondary sources. (imperial.ac.uk)
- We welcome applications from a variety of research fields including solid catalysts, molecular catalysts, and biocatalysts, as well as green processes and rare metal utilization via catalysis, along with materials science and development through novel catalysis. (mitsuichemicals.com)
20212
Palladium catalysis1
- A process involving direct oxidation of 1,3-butadiene to crotonaldehyde with palladium catalysis has also been reported. (cdc.gov)
Asymmetric Catalysis3
- Asymmetric catalysis has become a vital tool for modern synthetic chemists. (buecher.de)
- Afterwards, I joined the group of Prof. Shū Kobayashi (Tokyo University) as a JSPS fellow, working on asymmetric catalysis using alkaline earth metal complexes. (insa-rouen.fr)
- My research interests focus on the development of new methodologies, metal-catalyzed reactions, with a strong emphasis on copper chemistry, electron transfer based reactions, asymmetric catalysis and fluorinated molecules. (insa-rouen.fr)
General acid catalysis1
- The authors present the crystal structure of the MTR1 ribozyme that transfers the methyl group from O 6 -methylguanine to an adenine N1 in the target RNA and propose a catalytic mechanism based upon proximity, orientation and general acid catalysis. (semanticscholar.org)
Chemistry10
- Chem Catalysis -the first field-focused journal from the award-winning Cell Press chemistry title Chem - is a premier journal publishing innovative and insightful research on fundamental and applied catalysis. (cell.com)
- Her research interests are largely based in electro analytical chemistry, modified electrodes, electro-/organic catalysis and sensors. (eurekalert.org)
- Handbook of Coordination Catalysis in Organic Chemistry presents the increasing importance of homogeneous catalysis by metal complexes. (elsevier.com)
- This publication is intended for organic chemists, but is also useful to specialists and researchers interested in the coordination catalysis in organic chemistry. (elsevier.com)
- This interview reveals aspects of the Molecular Systems and Materials Chemistry cluster's work in the area of supramolecular chemistry and catalysis (Professor Anja Palmans), responsive functional materials and devices (Assistant Professor Danqing Liu) and complex supramolecular systems (PhD candidate Mathijs Mabesoone). (tue.nl)
- Here you can see ongoing and completed projects financed by Vinnova within the application area Chemistry and Catalysis. (vinnova.se)
- Informex, ORLANDO - Optimizing a synthesis for an active pharmaceutical ingredient (API) or pharma intermediate is a critical part of the pharmaceutical manufacturing process, and several exhibitors at this year's Informex highlighted their recent advances in catalysis, biocatalysis, and chiral chemistry. (pharmtech.com)
- Through the collaboration, PolyU hopes to bring formic acid to a cutting-edge solution for sustainable chemical processes and provide a new level of innovation, focus and ambition to confront challenges in green catalysis and sustainable chemistry. (edu.hk)
- The consortium is a world-leading catalysis and chemistry group with each member's specialities, working together on scientific research focussed on how CO2 can be used in green bulk chemicals production. (edu.hk)
- In 2004, Mitsui Chemicals established the "Mitsui Chemicals Catalysis Science Awards," which aim at contributing to the sustainable development of chemistry and the chemical industry. (mitsuichemicals.com)
Enzyme3
- Describe the basic aspects of Michelis-Menten enzyme kinetics and catalysis. (sabanciuniv.edu)
- Acts on the enzyme dihydrofolate reductase, which catalyses the reduction of folate to tetrahydrofolate, a compound necessary for DNA synthesis. (medscape.com)
- mutations high frequency of IDH1/2 mutations in oligodendrogliomas, astrocytomas and in alteRations in the RB1 pathway in The TET2 gene encodes the -KG- secondary glioblastomas derived thereof low-gRade diffuse gliomas lacking dependent enzyme that catalyses suggests that these tumours share a common genetic alteRations the conversion of 5-methylcytosine to common progenitor cell population. (who.int)
Areas of catalysis2
- The goal with the progam is that KCK should be an interdisciplinary and internationally established research centre within the areas of catalysis for emission control and energy-related catalysis. (chalmers.se)
- Nature Catalysis is an online-only journal that covers all areas of catalysis, incorporating the work of scientists, engineers and industry. (techxplore.com)
Synthesis2
- This is the 127th volume in the Advances in Polymer Science series and it contains four essays dealing with aspects of polymer synthesis and catalysis. (waterstones.com)
- For pioneering studies of the functionality of mesoporous oxides and carbons for real-world applications, ionic liquids for chemical separation and materials synthesis, and catalysis by nanomaterials. (ornl.gov)
Homogeneous1
- Homogeneous catalysis by transition metal complexes plays an important role in many significant industrial processes. (findaphd.com)
Centre1
- The Competence Centre for Catalysis, KCK, Period 2014-2017 is a four-year research program, financed by the Swedish Energy Agency, Chalmers and the member companies: AB Volvo, ECAPS AB, Haldor Topsøe A/S, Scania CV AB, Volvo Car Corporation AB och Wärtsilä Finland Oy. (chalmers.se)
Nanomaterials2
- Graphene-Based Nanomaterial Catalysis compiles knowledge about catalytic graphene-based nanomaterials in a single easy-to-read volume. (eurekalert.org)
- The reference also gives researchers in both industry and academia an opportunity to update their knowledge of graphene-based nanomaterials useful for catalysis. (eurekalert.org)
Photoredox catalysis1
- Herein, I will discuss the breaking of C-S and C-F bonds for the generation of C-centred radicals and its application in C-C bond forming reactions using photoredox catalysis and visible light. (beilstein-institut.de)
Catalytic4
- We are improving the understanding of catalysis, developing new catalytic processes with industry and promoting the use of catalysis as a sustainable 21st century technology. (cardiff.ac.uk)
- We investigate catalysis in the framework of elementary thermal operations, making use of its unique advantages to illuminate catalytic dynamics. (arxiv.org)
- Now, a metal-hydride amidate complex (HMn-NLi) has been isolated and found to have superior reactivity and catalytic performance compared with the corresponding HMn-NH complex, highlighting the superiority of M/NM′ bifunctional catalysis over the classic M/NH bifunctional catalysis for hydrogenation reactions. (nature.com)
- This article puts forward the technology of classific catalysis built up of Close Coupled Catalyst and Three-way Catalytic Converter and actualizes the testing research. (dict.cn)
20161
- Afterwards, from 2014 to 2016, he started another postdoc position with Professor Martin Oestreich at the Technische Universität Berlin and concentrated his research on Lewis acid catalysis. (beilstein-institut.de)
20203
- Guided by CRISPR pioneer Jennifer Doudna, a formidable entrepreneur in her own right, C&EN profiled 15 women working in the Chemical industry in academics and startups in C&EN's 2020 Trailblazers. (berkeley.edu)
- President & CEO: Tsutomu Tannowa) announced that Mitsui Chemicals Catalysis Science Awards will begin accepting applications for the "2020 Mitsui Chemicals Catalysis Science Awards" on September 2nd via web site of the company. (mitsuichemicals.com)
- We set the subheading of the 2020 Awards as "Catalysis Science Contributing to Sustainable Society," to highlight the social issues including plastic waste management to which the chemical industry could contribute. (mitsuichemicals.com)
Oxidation1
- There have been many applications of cerium oxide in oxidation catalysis but the understanding of its role in catalysis is rather limited. (bl.uk)
Organometallic1
- It could make organometallic catalysis applicable for therapy or diagnostics. (chemistryviews.org)
Reactions2
- RNA enzymes are postulated to have catalysed all chemical reactions in the earliest living cells, and selection for self-biotinylation yields a transfer RNA-like ribozyme that efficiently catalyses carbon-nitrogen bond formation. (semanticscholar.org)
- In a manuscript appearing online today in ACS Catalysis , we describe the discovery and development of the benzothiazole thioether, (BT)S, directing group for oxidative Heck and C-H activation reactions (click here ). (englelab.com)
Research3
- This new approach-which the team refers to as " phonon catalysis"-could lead to an entirely new field of research. (phys.org)
- Henry believes this method could lead to the creation of a new research field-one he refers to as "phonon catalysis. (phys.org)
- The Hong Kong Polytechnic University (PolyU) joins a world-leading catalysis research consortium launched by Johnson Matthey (JM), together with Fudan University (Fudan), Xiamen University (Xiamen), and University of Oxford (Oxford), working in partnership to accelerate global carbon neutrality goals using a novel formic acid strategy. (edu.hk)
Environmental2
- The central theme of the course is the use of catalysis to solve current environmental problems. (utwente.nl)
- Applied Catalysis B: Environmental , 93 (1-2), 166-176. (dtu.dk)
Catalyst1
- Within two hours after the injection of the catalyst and the substrate (the functionalized fluorescent dye) into the blood circuit, strong fluorescence in the two organs demonstrated successful in vivo gold catalysis. (chemistryviews.org)
Molecular2
- Molecular Design and Bioorganic Catalysis. (nyu.edu)
- Crystal structure of human 3-hydroxy-3-methylglutaryl-CoA Lyase: insights into catalysis and the molecular basis for hydroxymethylglutaric aciduria. (medlineplus.gov)
Acid1
- Vitamin K is an essential cofactor for γ-glutamyl carboxylase enzymatic activity that catalyses the γ-carboxylation of specific glutamic acid residues in a subclass of proteins. (medscape.com)
Https1
- Download the publication here: https://doi.org/10.2305/IUCN.CH.2021.09.en Download the Excel workbook of a global register of competences for threatened species recovery practitioners. (iucn.org)
Separation1
- Furthermore, they can be used for separation of materials, for catalysis, or for the targeted transport of drugs in the body. (nanotech-now.com)
Chemical biology1
- Goodey, NM & Benkovic, SJ 2008, ' Allosteric regulation and catalysis emerge via a common route ', Nature Chemical Biology , vol. 4, no. 8, pp. 474-482. (montclair.edu)
Science2
- In particular, the awards include the "Catalysis Science Award" and "Catalysis Science Award for Creative Work," which recognize outstanding achievements in catalysis science. (mitsuichemicals.com)
- The winners will be selected by a selection committee organized by Mitsui Chemicals, Inc., to consist of several world-class academic experts in catalysis science and a representative of Mitsui Chemicals. (mitsuichemicals.com)
Yield2
- The aim is to improve energy efficiency, reaction speed and yield in CO2 catalysis. (helmholtz-berlin.de)
- The mixture of SPRHA2 cells and PBGL cells transformed 200 g/L icariin into 103.69 g/L icaritin (yield 95.23%) in 4 h in whole-cell catalysis under the optimized reaction conditions. (bvsalud.org)
Derivatives1
- This observation allowed us to comment on a number of possible binding sites for imidazole and derivatives as exogenous proton donors/acceptors in catalysis by HCA III. (rcsb.org)
Role1
- In this course, the role of catalysis in both these situations will be discussed especially with the use of examples that cause air and water pollution. (utwente.nl)
Applications1
- Henry and his team have begun exploring potential applications for phonon catalysis. (phys.org)
Efficiency1
- CONCLUSIONS: Compared to previous reports on icaritin production, in this study, whole-cell catalysis showed higher production efficiency of icaritin. (bvsalud.org)