Compound catalyst. Medical search. Frequent questions

Ruthenium Compounds" is a descriptor in the National Library of Medicine's controlled vocabulary thesaurus, MeSH (Medical Subject Headings) . (harvard.edu)
Inorganic compounds that contain ruthenium as an integral part of the molecule. (harvard.edu)
This graph shows the total number of publications written about "Ruthenium Compounds" by people in Harvard Catalyst Profiles by year, and whether "Ruthenium Compounds" was a major or minor topic of these publication. (harvard.edu)
Below are the most recent publications written about "Ruthenium Compounds" by people in Profiles. (harvard.edu)
Non-metathesis reactions of ruthenium carbene catalysts and their application to the synthesis of nitrogen-containing heterocycles. (harvard.edu)

This Chapter will focus on the applications of bismuth(III) reagents and catalysts in heterocyclic chemistry, as applied to the synthesis of compounds of pharmaceutical interest. (eurekaselect.com)
Combined with an improved one-step synthesis of triol arylborates from boronic acid, this remarkably efficient new tool provided a variety of 4′-arylated phenylalanines and tyrosines in good yields at low catalyst loading with a wide functional group tolerance. (mdpi.com)
Transition-metal-catalyzed borylation has emerged as a powerful method for preparation of organoboron compounds, which are useful synthetic reagents in organic synthesis. (elsevierpure.com)
However, chemo-, regio-, and stereoselective synthesis of the boron compounds are still highly required. (elsevierpure.com)
Herein, we report copper (I)-catalyzed boryl substitution of allylic carbonates and ethers, monoborylation of 1,3-dienes and enynes, boryl substitution of alkyl halides, and borylative cyclization of alkenes containing an appropriate leaving group for the selective synthesis of various organoboron compounds including allyl- and allenylboronales, and optically active carbocyclic boronates. (elsevierpure.com)
Rare-earth-metal compounds selectively react with aldehydes, ketones and carbon dioxide to generate isolable compounds as crucial intermediates in organic synthesis and homogenous catalysis. (rsc.org)
These less stable compounds can then be broken down, allowing the carbon to be used in the synthesis of other plant products, such as sugars and proteins. (motherjones.com)

These polymaleimide derivatives can be active catalysts for the selective oxidation of heterocyclic compounds to quinoline and indole via the recycling of -C=O and -C-OH groups, which was confirmed by tracing the reaction with GC-MS using maleimide as the catalyst and by FT-IR analysis with polymaleimide as the catalyst. (nature.com)
Among the above transformations, active sites on the carbon catalysts toward selective oxidation or catalytic reduction include -C-OH and -C=O. The oxidation or reduction reactions can be realized via the recycling of the -C-OH and -C=O groups. (nature.com)
Catalytic performance exploration showed that these polymaleimide (PMI) derivatives can be active catalysts for the selective oxidation of heterocyclic compounds to quinoline and indole via the recycling of -C=O and -C-OH groups. (nature.com)
These results provide strong inspiration to design molecularly defined heterogeneous catalysts for selective oxidation reactions, and the key to realizing this idea is the development of a method to synthesize molecularly defined heterogeneous catalytic materials. (nature.com)
In addition, they often have higher oxidation states in compounds. (newworldencyclopedia.org)
Often, this type of regeneration uses an oxidation catalyst, such as platinum, vanadium or similar compound, to reduce the temperature necessary to begin regeneration. (cdc.gov)
One reaction of special interest is the carboligation of 5-HMF into C 12 compounds, including 5,5'-bis(hydroxymethyl)furoin (DHMF) and its subsequent oxidation to 5,5'-bis(hydroxymethyl)furil (BHMF), due to their potential applications as building blocks for polymers and hydrocarbon fuels. (lu.se)

Preparation and Screening of a Fluoride Doped Porous Metal Oxide Catalyst on Lignin Model Compounds. (rug.nl)
We prove here that Mo supported on Ti-modified dendritic mesoporous silica nanoparticles (DMSN) is an excellent catalyst for the oxidative desulfurization of model compounds and real crude oils. (edu.sa)

New, inexpensive metal oxide on metal hydrodeoxygenation catalysts have been developed. (udel.edu)

It is interesting to bridge the gap between homogeneous and heterogeneous catalysis via controllable construction of a heterogeneous catalyst containing defined active sites. (nature.com)

The catalysts are designed and synthesized with specific capabilities to produce targeted agri-based chemicals. (usda.gov)
Bio-oil is a mixture of over 200 different types of major and minor organic compounds, and is a source of some pure chemicals including phenol, organic acids, alcohol, and aldehyde, among others [12]. (researchgate.net)

The construction and/or functionalization of heterocyclic compounds is of major interest, since a large number of natural compounds and known drugs are heterocycles. (eurekaselect.com)
In addition to the inclusion of five- and sixmembered heterocycles, five- and six-membered heterocycles fused to one benzene ring, as well as other heterocyclic compounds, the application of bismuth(III) salts to chemistry of carbohydrates, nucleosides and β-lactams will also be considered. (eurekaselect.com)

The White catalyst has been found to be an effective catalyst for an oxidative version of the classic Heck reaction. (wikipedia.org)
Hydantoin bromide is an effective catalyst for chemoselective thioacetalization of aldehydes in the presence of ketones under neutral conditions. (itu.edu.tr)
Iron/iron oxide (Fe/Fe 2 O 3 ) nanoparticles were deposited on the surface of different carbonaceous anode materials: carbon felt (CF), carbon cloth (CC), and graphite (G) as an effective catalyst to improve the anode performance of microbial fuel cell (MFC) based on the real industrial wastewater. (edu.sa)

Develop efficient catalysts for depolymerization of lignin (main component in pulp and paper waste, bioethanol refineries, and future biorefineries) into functionalized aromatic monomers at high yield. (udel.edu)
By depolymerizing poplar wood with minimal purification, we have produced substituted aromatic compounds such as 4-propylsyringol and 4-propylguaiacol. (udel.edu)
In addition, a simple and efficient procedure for the deprotection of 1,3-dithianes and 1,3-dithiolanes of aromatic, aliphatic, and ,-unsaturated aldehydes and ketones in solvent-free conditions to the corresponding parent carbonyl compounds was successfully carried out with hydantoin bromide in excellent yields. (itu.edu.tr)
Aryl sulfide, an aromatic compound in which sulfur is attached to an aryl (a functional group derived from an aromatic ring), is found in biologically active materials effective against asthma, Alzheimer's disease, and cancer. (phys.org)
Senol O.I., Ryymin E.-M., Viljava T.-R., Krause A.O.I. (2007) Effect of hydrogen sulphide on the hydrodeoxygenation of aromatic and aliphatic oxygenates on sulphided catalysts, J. Mol. (ifpenergiesnouvelles.fr)

With measurements from MAX IV's SPECIES beamline, a group from Lund University and RISE , Research Institutes of Sweden, has successfully developed a model catalyst that, once tuned, holds potential to significantly improve the treatment process for the large-scale manufacture of viable biofuels from lignin. (lu.se)
Kena Li presented her midterm seminar entitled Base-catalyzed depolymerization of Kraft lignin for low-molecular-mass compound production on June 20, 2019. (lu.se)

Inorganic compounds can be pigments, fertilisers , catalysts and more. (newscientist.com)

Nickelsupported on SBA-15 doped with CeO 2 catalysts (Ni-CeO 2 /SBA-15)was prepared, and used for steam reforming of toluene which was selected as amodel compound of biomass gasification tar. (diva-portal.org)

Raybaud P. (2007) Understanding and predicting improved sulfide catalysts: Insights from first principles modeling, Appl. (ifpenergiesnouvelles.fr)
Paul J.-F., Cristol S., Payen E. (2008) Computational studies of (mixed) sulfide hydrotreating catalysts, Catal. (ifpenergiesnouvelles.fr)
Selenium is used as a catalyst in the preparation of pharmaceuticals including niacin and cortisone, as an ingredient in antidandruff shampoos (selenium sulfide), and as a constituent of fungicides (selenium sulfide) (IARC 1975a). (cdc.gov)

Generally, a homogeneous catalyst exhibits good activity and defined active sites but it is difficult to recycle. (nature.com)
These results might promote the development of heterogeneous catalysts with molecularly defined single active sites exhibiting a comparable activity to homogeneous catalysts. (nature.com)
As single-active site catalysts, homogeneous catalysts have the advantage of being well defined on a molecular level and readily soluble in the reaction medium. (nature.com)
However, homogeneous catalysts, i.e., transition metal complexes or organic molecules, often consist of valuable noble metals and/or ligands and face the problem of separation. (nature.com)
Thus, despite their intrinsic advantages, homogeneous catalysts are used in less than 20% of the industrially relevant processes because they are not easily recycled. (nature.com)

Over the past five years, Halas and colleagues have pioneered methods for making "antenna-reactor" catalysts that spur or speed up chemical reactions. (scitechdaily.com)
Tungsten is also used as a catalyst to speed up chemical reactions. (cdc.gov)

Read more about Sara Blomberg's project " In situ activation study of NiMo catalyst tailored for biofuel production" Here . (lu.se)

Develop various selective C-C coupling reaction chemistries via a slate of catalysts to build the carbon chain length starting from furans and long-chain functionalized molecules, such as fatty acids or their derivatives. (udel.edu)

The catalyst has been used in a variety of allylic C-H functionalization reactions of α-olefins. (wikipedia.org)
These reactions were catalyzed by the White catalyst or by an earlier version of the complex bearing benzyl substituents on the sulfoxide in place of phenyl. (wikipedia.org)
Nanoformulated calix[8]arenes functionalized with N -heterocyclic carbene (NHC)-palladium complexes were found to be efficient nano-reactors for Suzuki-Miyaura cross-coupling reactions of water soluble iodo- and bromoaryl compounds with cyclic triol arylborates at low temperature in water without any organic co-solvent. (mdpi.com)
This novel structure enhances the surface wettability of the electrode, the degradation reactions rate of organic compounds, and the microorganism adhesion on the electrode surface, and decreases the electron transfer resistance. (edu.sa)
The utility of this chemistry is further demonstrated by the tests of the novel catalysts (up to 10 −2 mol %) in different metathesis reactions such as cross metathesis (CM), ring-closing metathesis (RCM) and ring-opening cross metathesis (ROCM). (beilstein-journals.org)
Some reactions are even only made possible by the use of catalysts," explains Prof. Dr. Andreas Gansäuer. (uni-bonn.de)
However, titanium-based catalysts often still need a companion to be able to accelerate chemical reactions. (uni-bonn.de)
The experiments show that the compound can be activated by light and is then able to catalyze a specific form of redox reactions. (uni-bonn.de)
The antenna-reactor catalyst design allows Halas' team to mix and match metals that are best suited for capturing light and catalyzing reactions in a particular context. (scitechdaily.com)

Organic chemistry, the study of compounds which contain carbon, connects up molecules in new ways to build and analyse an array of materials, from drugs to plastics to flexible electronics. (newscientist.com)
The work is part of the green chemistry movement toward cleaner, more efficient chemical processes, and LANP has previously demonstrated catalysts for producing ethylene and syngas and for splitting ammonia to produce hydrogen fuel. (scitechdaily.com)

A herbicide compound, a preparation method therefor and an application thereof, the compound having a structure represented by formula (I), formula (II) or formula (III). (sumobrain.com)

Hydrodeoxygenation (HDO) kinetics of phenol over Ag/TiO 2 catalyst was investigated at 415-600 K and 1 atm. (lancs.ac.uk)

NanoLund Deputy Director Maria Messing and her research group at Lunds University use spark discharge generation to obtain more efficient and environmentally friendly processes in the manufacture of nano-sized catalysts. (lu.se)

Other tungsten compounds are used in ceramic pigments, as fire retardant coatings for fabrics, and as color-resistant dyes for fabrics. (cdc.gov)

A team of researchers from ETH Zurich, the National University of Singapore and the Institute of Chemical Research of Catalonia, has found that it is possible to use nickel-containing catalysts to produce multi-carbon products. (phys.org)
Catalysts lie at the heart of a greener and more sustainable future for chemical production. (phys.org)
Rice University engineers have created a light-powered catalyst that can break the strong chemical bonds in fluorocarbons, a group of synthetic materials that includes persistent environmental pollutants. (scitechdaily.com)
The task consisted of two subtasks: (1) named entity recognition to identify compounds and different semantic roles in the chemical reaction and (2) event extraction to identify event triggers of chemical reaction and their relations with the semantic roles recognized in subtask 1. (frontiersin.org)
Lack of benchmark data with annotations of detailed information critical for new chemical compound discovery hinders the development of NLP-based information extraction systems that can be applied in a real-world setting. (frontiersin.org)
Chemical compounds of tungsten are used for many purposes. (cdc.gov)
Consequently, mines should be aware of the chemical composition of any catalysts they choose to employ and the resulting impact on NO 2 emissions. (cdc.gov)
Roughly 80 percent of all chemical products are manufactured using catalysts. (lu.se)

The aluminum portion of the particle (white and pink) captures energy from light (green), activating islands of palladium catalysts (red). (scitechdaily.com)

News from the Max Planck Institute in Potsdam, Germany, describes how a new catalyst that can split carbon dioxide gas might allow us to use carbon from the atmosphere as a fuel source. (motherjones.com)

Although heterogeneous catalysts have been extensively used in practical processes due to their easy recoverability and operation, they often possess different catalytically active sites, and testing them on a molecular level is difficult. (nature.com)

A team of researchers at California Institute of Technology has found a nickel catalyst that bonds alkyl nucleophile and alkyl electrophiles to make a single stereoisomer with two chiral centers. (phys.org)
The level of respiratory protection for nickel catalyst bagging operations needs to be increased immediately until improved engineering controls lower exposures there. (cdc.gov)

The White catalyst is a transition metal coordination complex named after the chemist by whom it was first synthesized, M. Christina White, a professor at the University of Illinois. (wikipedia.org)

Ample burning of wood in small-scale room heaters and sauna stoves is likely to increase chronic personal exposures in the neighborhood to particulate matter that contains substantial amounts of soot and hazardous organic compounds like polycyclic organic hydrocarbons. (sciencedaily.com)

The can remove 92.5-99.5% of the most refractory compounds in the optimized conditions of 80 °C. For the Arabian Extra light crude oil (AXL), we employed Fourier-transform ion cyclotron resonance (FT-ICR) to analyze in detail the sulfur-containing compounds in the feedstock, oxidized product, and extraction phase. (edu.sa)

Although the presence of a catalyst, in either form, will increase the feasibility of the filter by allowing regeneration at lower exhaust temperatures, it may also result in an increase in the concentration of NO 2 in the exhaust. (cdc.gov)

Simultaneous photo-catalyst and electrochemical processes were conducted to evaluate the performance of a new hybrid process for wastewater treatment. (ijche.com)
While catalysts are widely used in industry, they are typically used in energy-intensive processes that require high temperature, high pressure, or both. (scitechdaily.com)

Under the present conditions, the catalyst was stable after 4 hr of HDO runs and able to be regenerated via H 2 -activation and calcination in air at 553 K with at least 98.9% removal efficiency to remove coke deposits and reform Ag metal species after HDO. (lancs.ac.uk)

The present invention relates to compounds as calcium channel blocker, a composition comprising thereof, use of said compounds and a method for treating diseases or disorders associated with calcium ion channel using said compounds. (sumobrain.com)

since then, use of other indium compounds [e.g., indium tin oxide (ITO), copper indium gallium diselenide (CIGS)] has burgeoned. (who.int)

Metal catalysts are widely used in the production of drugs, dyes, adhesives, and plastics. (phys.org)

These materials are composed, in general, by a main organic component 5 and inorganic elements such as radiopacifiersand filler particles, such as bismuth compounds 6 . (bvsalud.org)
In medicine, bismuth compounds such as bismuth subsalicylate can be used for the treatment of various gastrointestinal illnesses 8-10 . (bvsalud.org)
In Dentistry, bismuth compounds (e.g. bismuth oxide)provide an acceptable radiopacity to root canal sealers 6,11-12 . (bvsalud.org)

In photosynthesis, the CO2 molecule is initially bonded to nitrogen atoms, making reactive compounds called carbamates. (motherjones.com)
In an attempt to emulate this natural process, Goettmann and colleagues Arne Thomas and Markus Antonietti developed their own nitrogen-based catalyst that can produce carbamates. (motherjones.com)
The graphite-like compound is made from flat layers of carbon and nitrogen atoms arranged in hexagons. (motherjones.com)

These compounds' oxygen content results in detrimental characteristics such as reduced energy density, instability, high viscosity, and corrosion [14]. (researchgate.net)

The effect of current density, photo-catalyst loading, and BTX initial concentration was investigated experimentally. (ijche.com)
Fed-batch biotransformation generated a maximum DHMF concentration of 53.0 g/L (or 26.5 g DHMF/g cell catalyst) with productivity of 10.6 g/L .h, after five feeds of 20 g/L 5-HMF. (lu.se)

Many transition metals are useful as catalysts in industrial and laboratory settings, and many of these elements form brightly colored compounds. (newworldencyclopedia.org)

It activates the catalyst, (unlike the latter) is consumed in the reaction, and generates by-products as waster. (uni-bonn.de)

We usually use titanium compounds instead," says Gansäuer. (uni-bonn.de)
We therefore had to make some modifications to the titanium catalyst we usually use," says Gansäuer. (uni-bonn.de)
Figuratively speaking, the titanium compound thus becomes "greedier" to accept an electron. (uni-bonn.de)

This allows us, for example, to produce compounds that serve as starting materials for many important drugs. (uni-bonn.de)

Experiments were performed to reveal the effects of several factorson the toluene conversion and product gas composition, including the reactiontemperature, steam/carbon (S/C) ratio, and CeO 2 loading content.Moreover, the catalysts were subjected to analysis of their carbon contentsafter the steam reforming experiments, as well as to test the catalyticstability over a long experimental period. (diva-portal.org)
The toluene conversionreached as high as 98.9% at steam reforming temperature of 850 °C and S/C ratioof 3 using the Ni-CeO 2 (3wt%)/SBA-15 catalyst. (diva-portal.org)
The energy-saving feature of antenna-reactor catalysts is perhaps best illustrated by another of Halas' previous successes: solar steam. (scitechdaily.com)

A catalyst reduces this activation energy. (uni-bonn.de)
However, there have been attempts for some time to achieve this activation in a different way: By irradiating the catalyst with light. (uni-bonn.de)

The results indicated that theNi-CeO 2 /SBA-15 catalysts exhibited promising capabilities on thetoluene conversion, anti-coke deposition and catalytic stability. (diva-portal.org)

Catalytic ozonation of organic compounds in water over the catalyst of RuO 2 /ZrO 2 -CeO 2 Wang, Jianbing;Wang, Guoqing;Yang, Chunli;Yang, Shaoxia;Huang, Qing 2015-08-01 00:00:00 Abstract This research investigates the performances of RuO2/ZrO2-CeO2 in catalytic ozonation for water treatment. (sagepub.com)

Anatomy3

Organisms3

Chemicals and Drugs166

Analytical, Diagnostic and Therapeutic Techniques and Equipment24

Phenomena and Processes49

Disciplines and Occupations6

Technology, Industry, Agriculture8

Information Science2

Health Care6

Ruthenium5

Synthesis7

Oxidation7

Model Compounds2

Hydrodeoxygenation catalysts1

Catalysis1

Chemicals2

Heterocyclic compounds2

Effective catalyst3

Aromatic5

Lignin2

Inorganic compounds1

Biomass1

Sulfide3

Homogeneous5

Speed up chemical reactions2

Biofuel Production1

Coupling reaction1

Reactions9

Chemistry2

Therefor1

Phenol1

Environmentally friendly1

Pigments1

Chemical8

Palladium1

Carbon dioxide1

Molecular1

Nickel2

Transition metal1

Hydrocarbons1

Sulfur1

Feasibility1

Processes2

Stable1

Thereof1

Copper1

Widely1

Bismuth3

Nitrogen3

Characteristics1

Concentration2

Metals1

Products1

Titanium3

Drugs1

Steam3

Activation2

Capabilities1

Abstract1