• Two high-performance Cu catalysts were successfully developed by immobilization of Cu ions in the nanospaces of poly(propylene imine) (PPI) dendrimer and magadiite for the selective C-C coupling of 2,6-dimethylphenol (DMP) to 3,3',5,5'-tetramethyldiphenoquinone (DPQ) with O 2 as a green oxidant. (mdpi.com)
  • The PPI dendrimer encapsulated Cu ions in the internal nanovoids to form adjacent Cu species, which exhibited significantly high catalytic activity for the regioselective coupling reaction of DMP compared to previously reported enzyme and metal complex catalysts. (mdpi.com)
  • MnO x catalysts have been proven to have superior activity at low temperatures (LT) for selective catalytic reduction (SCR) of NO x . (aaqr.org)
  • The aim of this work is to investigate the performance of catalysts consisting of two metal oxides supported on alumina (SOR10-III and SO10-IV) in the selective catalytic reduction (SCR) of NOx with two representative components of diesel exhaust, namely propylene and dodecane, as reductants. (aiche.org)
  • Although precious metal-based mixed metal oxides (MMOs) have been used as CER catalysts for more than half a century, they intrinsically suffer from a selectivity problem between the CER and parasitic oxygen evolution reaction (OER). (jecst.org)
  • In comparison to a-surface that is prevalently exposed in unoriented HAP-based catalysts, the c-surface (i.e., (002) crystalline plane) of HAP-based catalysts exhibited up to 47-fold enhancement in areal rate in both reactions. (osti.gov)
  • Mastery of selective methane oxidation using man-made catalysts - materials capable of performing desirable molecule transformations without being consumed or changed themselves - requires the efficient isolation of the initial product (e.g. methanol). (forskningsradet.no)
  • Selective oxidation of alkanes such as methane promises to be an efficient waste mitigation strategy, provided superior and scalable catalysts can be designed, exhibiting both high activity and selectivity. (forskningsradet.no)
  • This will allow control over active site location and coordination, and substrate/product discrimination paving the way for the next generation of selective oxidation catalysts for small alkanes. (forskningsradet.no)
  • When MgO supported gold-palladium catalysts were used for this reaction, the toluene selectivity reduced substantially at the cost of conversion. (southwales.ac.uk)
  • Herein, we report the photocatalytic decarboxylative alkenylation reactions of N -(acyloxy)phthalimide derived from α-amino and α-hydroxy acids with 1,1-diarylethene, and with cinnamic acid derivatives through double decarboxylation, using NaI and PPh 3 as redox catalysts. (rsc.org)
  • Cu/nitroxyl catalysts promote a highly efficient and selective aerobic oxidative lactonization of diols under mild reaction conditions using ambient air as the oxidant. (organic-chemistry.org)
  • Selective alcohol dehydrogenation on heterogeneous catalysts is a key industrial reaction for production of aldehydes, ketones, and carboxylic compounds. (jyu.fi)
  • In search of such catalysts, scientists supported in part by the EU-funded enzC-Hem project have engineered an enzyme that can speed up an organic reaction well known for its extremely slow reaction rate. (europa.eu)
  • However, it requires high catalyst loadings and has long reaction times with existing catalysts (normally small-molecule catalysts such as DABCO and DMAP) , taking several days to produce a useful amount of product. (europa.eu)
  • Results showed that low concentrations of BH32.14 added to the MBH reaction can achieve much larger yields than high loadings of current small-molecule catalysts. (europa.eu)
  • Selective Serotonin Reuptake Inhibitors (SSRIs) are a class of drugs that are typically employed as antidepressants in the treatment of major depressive disorders, anxiety disorders, and other psychological conditions. (wikipedia.org)
  • Although this reaction has occurred in patients receiving triptans alone, the risk for its occurrence is significantly increased by concomitant use of selective serotonin reuptake inhibitors (SSRIs: eg, fluoxetine, paroxetine, sertraline, fluvoxamine, citalopram, and escitalopram) or serotonin-norepinephrine reuptake inhibitors (SNRIs: eg, venlafaxine and duloxetine). (medscape.com)
  • The Kobayashi aldol reaction is one of the most powerful methods to synthesize the polyketide skeleton and has been applied to the total synthesis of natural products. (elsevierpure.com)
  • A method for the selective synthesis of o -halothiobenzamide by thiolysis reaction of o -halobenzonitrile with NaHS under the action of CO 2 was explored. (sioc-journal.cn)
  • Synthesis of o- Halothiobenzamide Derivatives from the Selective Thiolysis Reaction of o -Halobenzonitrile Mediated by CO 2 [J]. Chinese Journal of Organic Chemistry , 2019, 39(12): 3542-3549. (sioc-journal.cn)
  • In the presence of a catalytic amount of the optically active cobalt(III) hexafluoroantimonate, the inverse electron-demand 1,3-dipolar cycloaddition reaction of dihydrofuran with nitrones bearing an electron-withdrawing group effectively proceeded to afford the corresponding adducts with excellent endo-selectivity. (elsevierpure.com)
  • In a chlor-alkali electrolyzer, the chlorine evolution reaction (CER, Equation 1 ) generates gaseous Cl 2 at the anode, which is counterbalanced by the hydrogen evolution reaction (HER) at the cathode ( Fig. 1 ) [ 1 , 2 , 4 ]. (jecst.org)
  • Moreover, the buffer system also provided the additionally required hydrogen atom for the thiolysis reaction of o -haloben-zonitrile with NaHS. (sioc-journal.cn)
  • Increasing current pushed the reaction beyond reducing the carbonyl to an alcohol group, removing the alcohol group and leaving just a carbon-hydrogen bond. (chemistryworld.com)
  • Carbon dioxide can be converted into methanol and water by reaction with hydrogen. (lu.se)
  • In this context we designed a novel strategy to access meta -oligoazobiphenyls via site-selective Mills reaction and Suzuki cross-coupling in a highly efficient iterative way. (beilstein-journals.org)
  • Transition-metal-catalyzed direct site-selective functionalization of arene C-H bonds has emerged as an innovative approach for building the core structure of pharmaceutical agents and other versatile complex compounds. (nature.com)
  • Over the past decade, transition-metal-catalyzed direct site-selective functionalization of arene C-H bonds has emerged as an innovative approach for building the core structure of pharmaceutical agents and other versatile complex compounds. (nature.com)
  • Site-selective C-H activation reactions. (nature.com)
  • This study identifies new phosphite‐oxazoline ligands that have been successfully applied in the palladium‐catalyzed intermolecular asymmetric Heck reaction. (insa-toulouse.fr)
  • Here, the predominant exposure of c-surface was controlled, and its influences in methane oxidation reactions (combustion and oxidative coupling over HAP and lead-substituted HAP (Pb-HAP), respectively) were studied. (osti.gov)
  • The present study explored the effects of HAP crystal orientation in methane oxidation reactions, which revealed distinct catalytic behaviors of crystal surfaces in HAP-based materials. (osti.gov)
  • article{osti_1543698, title = {Effects of Controlled Crystalline Surface of Hydroxyapatite on Methane Oxidation Reactions}, author = {Oh, Su Cheun and Xu, Jiayi and Tran, Dat T. and Liu, Bin and Liu, Dongxia}, abstractNote = {Hydroxyapatite (HAP, Ca10(PO4)6(OH)2) has a hexagonal prismatic structure that exposes two crystalline surfaces: prism-faceted a- and basal-faceted c-surfaces. (osti.gov)
  • Alternative post-combustion NO x reduction techniques, including selective catalytic reduction and selective non-catalytic reduction (SNCR), have been used for NO x elimination. (aaqr.org)
  • To facilitate identification of R. mannitolilytica and R. pickettii , we developed 16S ribosomal DNA-based polymerase chain reaction assays that allow sensitive and specific identification of these species. (cdc.gov)
  • We also describe the development and evaluation of two polymerase chain reaction (PCR) assays for rapid, accurate identification of R. pickettii and R. mannitolilytica . (cdc.gov)
  • Using polymerase chain reaction Mycoplasma hominis and Ureaplasma urealyticum were detected in cervical secretions of 19.2% and 13.7% of infertile women, and the presence of mycoplasma was significantly correlated with the presence of AZP-Ab and ASA. (who.int)
  • In particular, the availability of substrate and inhibitor "probes" for the major hepatic drug metabolizing UGTs together with batteries of recombinant enzymes allow the reaction phenotyping of drug glucuronidation reactions. (nih.gov)
  • a Reported substrate scope of para -selective C-H activation. (nature.com)
  • Because of its simplicity and precision in the determination of reaction rates required for kinetic analysis, this kit offers many advantages over the commonly used HPLC or electrophoresis-based assays for peptide substrate hydrolysis by retroviral PRs. (eurogentec.com)
  • Abundant multi-borylated compounds, such as alkyl 1,2-bis(boronates), gem -diborylalkanes and 1,1,2-tris(boronates) are constructed via the base-promoted DBP strategies, which can undergo selective protodeboronation, giving many borylated molecules. (rsc.org)
  • The Scripps team is now exploring redox reactions of various functional groups under rAP conditions. (chemistryworld.com)
  • Ethylene glycol was used as energy media, and selective ethylene glycol oxidation reaction was examined. (elsevierpure.com)
  • This means that 79% of energy can be used compared to complete oxidation reaction. (elsevierpure.com)
  • BN(SiMe 3 ) 2 ] acts as a source of a borylene fragment for selective intermolecular insertion into C-H bonds under very mild conditions. (rsc.org)
  • The electrochemical chlorine evolution reaction (CER) is an important electrochemical reaction and has been widely used in chlor-alkali electrolysis, on-site generation of ClO − , and Cl 2 -mediated electrosynthesis. (jecst.org)
  • Since historically almost all electrochemical reactions have been studied under direct current, rAP opens a new territory where barely anything is known,' Kawamata says. (chemistryworld.com)
  • Subjects in this analysis were adult outpatients (18-65 years) enrolled from 2 acute, double-blind, placebo-controlled trials comparing adjunctive l -methylfolate and placebo for DSM-IV major depressive disorder (MDD) with an inadequate response to monotherapy selective serotonin reuptake inhibitor (SSRI). (psychiatrist.com)
  • 2 , 3 , 4 In the Sequenced Treatment Alternatives to Relieve Depression (STAR * D) trial, 5 among those who remitted with selective serotonin reuptake inhibitor (SSRI) monotherapy, 40.1% had a relapse or recurrence over the subsequent 12 months. (psychiatrist.com)
  • This may be due to a reaction mechanism which has the formation of adsorbed partially oxidized hydrocarbon as the rate determining step. (aiche.org)
  • The reaction leads to the formation of seven- and eight-membered siloxycycles in excellent yields which could be further converted into the corresponding allylic alcohols upon oxidation. (edu.sa)
  • The model includes galactoglucomannan, xylan, and cellulose acid‐base equilibria, in addition to peeling, stopping, and alkaline hydrolysis reactions of the same carbohydrates, as well as hexenuronic acid formation and degradation reactions. (jyu.fi)
  • Selective Formation of Aminomethyl-1,2-dihydrofullerenes vs Fulleropyrrolidines. (bvsalud.org)
  • Together, our findings not only demonstrate that Btk plays an essential and conserved role in regulating immunoreceptor-mediated immune responses in both humans and rodents, but also provide evidence and mechanistic insights to support the development of selective Btk inhibitors as small-molecule disease-modifying drugs for RA and potentially other autoimmune diseases. (aspetjournals.org)
  • Herein we report an intramolecular endo-selective Heck reaction of iodomethylsilyl ethers of phenols and alkenols. (edu.sa)
  • Therefore, a catalyst-controlled strategy for para -selective C-H functionalization of arenes is highly desired. (nature.com)
  • Because the anodic CER requires a larger overpotential than the HER, the design of highly active, selective, and long-term durable CER electrocatalysts is of prime importance in the chlor-alkali process. (jecst.org)
  • Highly (E)-selective Wadsworth-Emmons reactions promoted by methylmagnesium bromide. (ox.ac.uk)
  • An experimentally simple protocol for the very highly (E)-selective Wadsworth-Emmons reaction [(E):(Z) selectivities in excess of 180:1 in some cases] of a range of straight-chain and branched aliphatic, substituted aromatic, and base-sensitive aldehydes via reaction with an alkyl diethylphosphonoacetate and MeMgBr is reported. (ox.ac.uk)
  • Since both GO and SF have abundant hydrophilic groups and LiBr has good hygroscopicity, the redox reaction in this structure is highly sensitive to humidity. (nature.com)
  • However, HPLC/MS is known to be a highly selective and sensitive method and results with urine samples indicate that it should also be a good method for determining 2,4,6-trinitrotoluene in blood. (cdc.gov)
  • The results along with the GEANT extrapolation to optimum experimental conditions confirm that RoSiB is a highly efficient and selective device for identification of rare reaction channels with heavy ions. (lu.se)
  • As reported in the news article, while Dr Baker - who is a co-author in the current study - and his team succeeded in designing enzymes for the MBH reaction, these enzymes acted weakly. (europa.eu)
  • Additionally, the reaction only takes a few hours, not several days. (europa.eu)
  • Adverse reactions in pediatric patients were similar. (nih.gov)
  • To report SUSPECTED ADVERSE REACTIONS, contact Apotex at 1-800-706-5575 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. (nih.gov)
  • monitor for changes in renal function and mesalamine-related adverse reactions. (nih.gov)
  • Under the conditions of our experiments the new reaction resulted in total conversion both of the nitrates additives and of ammonia, when they were fed in sub-stoichiometric amounts: thus, the "Enhanced SCR" chemistry is also compatible with limitations on the ammonia slip. (sae.org)
  • The work supported by enzC-Hem (Creating Versatile Metallo-Enzyme Environments for Selective C-H Activation Chemistry: Lignocellulose Deconstruction and Beyond) shows that combining computational design and directed evolution could lead to new biocatalysts for important chemical transformations not found in nature. (europa.eu)
  • This review describes some of the major applications of Minisci reactions and related processes to medicinal or biological chemistry, and highlights some potential developments within this area. (rsc.org)
  • The chemical reaction will then take place on the particle surfaces. (lu.se)
  • Common selective precipitation methods can then be used to recover these metals from the leach liquor. (cdc.gov)
  • The effects of catalyst composition, solution pH and other reaction conditions will be discussed. (aiche.org)
  • In addition to the modulation of synchronization during visual stimulation, selective attention significantly changed the prestimulus pattern of synchronization. (jneurosci.org)
  • The model is very successful in predicting the experimental data of carbohydrate reactions during kraft pulping. (jyu.fi)
  • This synthetic method could be used to prepare different substituted o -halobenzonitriles, which is a simple, efficient and high atom-economic reaction. (sioc-journal.cn)
  • From days to just hours: Researchers have created the first efficient and selective biocatalyst for a powerful, but usually slow organic reaction. (europa.eu)
  • Aiming to create the first efficient and selective biocatalyst for the MBH reaction, the research team used an enzyme - BH32 - developed a few years earlier by Dr David Baker and his team at the University of Washington in the United States. (europa.eu)
  • This presentation will highlight recent results on Au-catalyzed selective oxidation of glycerol and HMF to mono and diacids as well as Pt-catalyzed hydrogenolysis of glycerol to various C2 and C3 compounds. (aiche.org)
  • While pulsed techniques and AC current have been used to study reactions of simple compounds such as carbon dioxide, those studies have been ignored by the synthetic organic community. (chemistryworld.com)
  • Oxidation and disproportionation reactions respond slightly differently to the changes in reaction parameters, like oxygen concentration and pressure, when a micro packed bed reactor was used instead of a conventional glass stirred reactor. (southwales.ac.uk)
  • Oxidation of propylene competes with the SCR reaction. (aiche.org)
  • However, they also catalyze the acidic oxygen evolution reaction (OER, Equation 2 ) as a parasitic reaction that competes with CER [ 7 , 8 ]. (jecst.org)
  • Selective estrogen receptor modulators (SERM) are a class of medications used to relieve postmenopausal symptoms and to prevent bone loss ( osteoporosis ) associated with menopause . (rxlist.com)
  • Pharmacologic therapy for osteoporosis includes most commonly the use of antiresorptive agents to decrease bone resorption, such as bisphosphonates, denosumab, and the selective estrogen-receptor modulator (SERM) raloxifene. (medscape.com)
  • Results of a preliminary study of the mechanism indicate that chelation-assisted cycloruthenation might play a role in the selective activation of para -C Ar -H bonds. (nature.com)
  • HIV protease (PR) is identified as an important drug-screening target for the design of selective acquired immunodeficiency syndrome (AIDS) therapeutics. (eurogentec.com)
  • May 6, 2009 - The US Food and Drug Administration (FDA) has approved safety labeling revisions to warn clinicians of the risk for serotonin syndrome in patients receiving combination therapy with almotriptan malate, drug interactions with verapamil HCl/trandolapril fixed-dose combination therapy, and to advise against reinitiating therapy in patients who have experienced hepatotoxic reactions to nitrofurantoin monohydrate. (medscape.com)
  • It clearly demonstrates the unique chemical reactivity that AC electrolysis can offer for controlling reaction pathways,' Luo says. (chemistryworld.com)
  • Is the Subject Area "Reaction time" applicable to this article? (plos.org)
  • Such reactions constitute a broad-set of selective CH-functionalization processes. (rsc.org)
  • The diagnosis of these processes based on the slope of the reaction time is controversial. (bvsalud.org)
  • Under such conditions a new reaction occurs, the so-called "Enhanced SCR" reaction, 2 NH₃ + 2 NO + NH₄NO₃ → 3 N₂ + 5 H₂O. (sae.org)
  • However, currently finding optimal reaction conditions relies heavily on trial-and-error and lacks rational design, which might limit the wide application of this method, Luo adds. (chemistryworld.com)
  • These adverse drug reactions have a broad spectrum of clinical manifestations that can mimic those of other disease states, including both local and systemic conditions. (medscape.com)
  • Many people with selective IgA deficiency have no symptoms. (medlineplus.gov)
  • The reaction in question is called the Morita-Baylis-Hillman (MBH) reaction, a powerful process used to form a carbon-carbon bond between an alkene and an electrophilic compound such as aldehyde. (europa.eu)
  • The clinical patterns of adverse drug reactions of the oral cavity include xerostomia, swelling, nonspecific ulceration, vesiculobullous or ulcerative mucositis that mimics other disease states, nonspecific vesiculoulcerative mucositis, pigmentation, gingival enlargement, and medication-related osteonecrosis of the jaws. (medscape.com)
  • The agency also warned of rare nitritoid reactions reported in patients receiving concomitant treatment with injectable gold (sodium aurothiomalate) and angiotensin-converting enzyme inhibitors such as trandolapril. (medscape.com)
  • How Do Selective Estrogen Receptor Modulators Work? (rxlist.com)
  • Selective estrogen receptor modulators work by modulating the activity of estrogen receptors, proteins in cells that are activated by estrogen. (rxlist.com)
  • Selective estrogen receptor modulators have both estrogen agonistic and antagonistic properties, depending on the type of tissue. (rxlist.com)
  • Selective estrogen receptor modulators may also be combined with estrogen for postmenopausal women with an intact uterus, who are undergoing estrogen replacement therapy. (rxlist.com)
  • How are selective estrogen receptor modulators used? (rxlist.com)
  • What are side effects of selective estrogen receptor modulators? (rxlist.com)
  • In addition, their NO x catalytic performance, along with relevant main factors (reaction temperature, molar ratio, particle size, space velocity, and O 2 content), was investigated in a simulated fixed bed reactor. (aaqr.org)
  • Selective attention lends relevant sensory input priority access to higher-level brain areas and ultimately to behavior. (jneurosci.org)
  • We report that the spiking output of neurons in area V4 synchronizes in the gamma-frequency band at near-zero time lag during visual stimulation and show that this spike-to-spike synchronization is enhanced with selective attention. (jneurosci.org)
  • We present the development of the selective attention concept and some important questions about this concept using the visual search task. (bvsalud.org)
  • As a result, they can have severe, even life-threatening reactions to transfusions of blood and blood products. (medlineplus.gov)
  • In this review, we provide an overview of the fundamental issues related to the electrocatalysis of the CER and design strategies for selective CER electrocatalysts. (jecst.org)
  • In this work, based on the metal-air redox reaction, which is usually used in designing metal-air batteries, we design a self-powered chemoelectric humidity sensor where a silk fibroin (SF) and LiBr gel matrix containing parallel aligned graphene oxide (GO) flakes serve as the electrolyte. (nature.com)