Reaction complexes. Medical search. Frequent questions

The ternary complexes are readily constructed in situ from three simple precursors and enable a highly modular installation of various substitution patterns. (nature.com)

Reactions of Carbonyl Sulfide and Carbon Disulfide with Iron and Ruthenium Complexes. (northwestern.edu)
Dive into the research topics of 'Reactions of Carbonyl Sulfide and Carbon Disulfide with Iron and Ruthenium Complexes. (northwestern.edu)

abstract = "The reaction of Fe(CO)2(PPh3)3 with COS in toluene results in the formation of Fe(CO)3(PPh3)2 and SPPh3. (northwestern.edu)
abstract = "Photosystem I (PS I) reaction center complexes isolated from the thermophilic cyanobacterium Synechococcus elongatus with nonionic detergents, digitonin or sucrose monolaurate, contained eight small subunit polypeptides. (elsevierpure.com)

The short lifetime of laser-stimulated processes was identified to be the key aspect that enables for the synthesis of functional materials starting from complex systems. (uni-marburg.de)
A third transient Mg 2+ has also been observed for DNA synthesis, but in that case it coordinates the leaving group instead of the nucleophile as in the case of the RNase H1 hydrolysis reaction. (rcsb.org)
These reactions are suggested to involve metal carbene intermediates and the potential of metathesis reactions in organic synthesis has been discussed. (soton.ac.uk)
Indeed, the direct single-step synthesis of complex alkaloid frameworks remains an unresolved problem at the heart of organic chemistry in spite of the tremendous progress of the discipline. (nature.com)
The synthesis is reported of a series of ternary cationic complexes of general form [Co(R,Rpicchxn)(ARMA) + (where picchxn is the N 4 tetradentate N,N′-di(2-picolyl)-1,2-diaminocyclohexane and ARMA is a bidentate α-substituted-α-aminomalonate dianion). (edu.au)
This aspect is manifested in O-alkylations, which converts acyl complexes to alkoxycarbene complexes: Metal acyl complexes participate in several commercial processes, including: hydroformylation acetic acid synthesis Eastman acetic anhydride process Ethylene-carbon monoxide copolymerization A reaction involving metal acyl complexes of occasional value in organic synthesis is the Tsuji-Wilkinson decarbonylation reaction of aldehydes. (wikipedia.org)
Aldolases catalyze the reversible reactions of aldol condensation and cleavage and have strong potential for the synthesis of chiral compounds, widely used in pharmaceuticals. (rcsb.org)

For these investigations, (1H, 15N) NMR HSQC methods will be employed to study the photochemistry of photosensitive Pt(IV)-complexes. (europa.eu)
A knowledge of the details concerning the photochemistry of Pt(IV)-complexes will allow us to improve the design of light-activatable Pt(IV)-prodrugs, which could lead to more effective, less toxic therapies of cancer. (europa.eu)
The large variety of reaction types accessible via photochemistry opens an even wider field of potential applications. (uni-marburg.de)
The PufX polypeptide creates a channel that allows the lipid soluble electron carrier quinol, produced by RC photochemistry, to diffuse to the cytochrome bc1 complex, where quinols are oxidised to quinones, with the liberated protons used to generate a transmembrane proton gradient and the electrons returned to the RC via cytochrome c2. (uea.ac.uk)
Fundamental studies of photoelectrochemical processes in complex materials, including photophysics and photochemistry of light-harvesting and light-emitting molecules, as well as energy and electron transfer processes in supramolecular systems and molecular-semiconductor hybrid nanomaterials. (lu.se)

We study both surface-supported metal element nanoparticles, oxide films, and transition metal complexes. (lu.se)

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)
Attempts to carry out these reactions under catalytic conditions withrespect to the nickel complex were unsuccessful.Reactions of isoprene and acetaldehyde only gave products in a catalyst system derived from Ni(CDT).PR3. (soton.ac.uk)
Whereas it is not possible to perform electron spectroscopy at realistic pressures for e.g. industrial catalytic reactions, the attainable pressures in the range of 0.01 to of ca. 30 mbar are in most cases sufficient for modelling real reaction conditions. (lu.se)

A research project to develop and characterize "Photofunctional Iron Complexes" involving the Theoretical Chemistry Division at Lund University has been awarded 35,000,000 SEK in funding from the Knut and Alice Wallenberg Foundation for the five-year period 2020 - 2024. (lu.se)

Measurements of the amplitude and lifetime decay of fluorescence emission from LH2 complexes, the energy transfer donors, and gain of fluorescence emission from acceptor RCLH1 complexes, provide evidence for excitation energy transfer from LH2 to RCLH1. (whiterose.ac.uk)
The results show that both complexes retained their individual and collective functions and are capable of directional excitation energy transfer for at least 60 days. (whiterose.ac.uk)
sphaeroides, light-harvesting 2 (LH2) complexes transfer absorbed excitation energy to dimeric reaction centre (RC)-LH1-PufX complexes. (uea.ac.uk)

The use of well-defined (N-heterocyclic carbene)-Ag(I) complexes for the A(3) reaction allows for the coupling of unactivated aldehydes at room temperature and very short reaction times. (figshare.com)

This will clarify the role of the nucleotide bases in the photochemical reactions. (europa.eu)
At 40 C the reaction is first order in both manganese dimer and benzyl choride and is not inhibited by added CO. This contrasts with that previously reported for the photochemical reaction and indicates that the thermal reaction follows a different pathway. (kingston.ac.uk)

They simulated the reactions of CH 3 MgCl with acetaldehyde and fluorenone in tetrahydrofuran, revealing a complicated mechanistic landscape involving competing nucleophilic and radical pathways that differ in energy by just 1 kcal-too small for their simulations to differentiate. (acs.org)
Reaction of benzaldehyde, acrolein and acetaldehyde with butadiene in the presence of stoichiometric quantities of the a,w -octadiendiyl nickel phosphine complex have been studied. (soton.ac.uk)

Presented insights into laser-stimulated reaction pathways and pattern formations processes provide a valuable basis for future studies in this field. (uni-marburg.de)
The rate-determining step in the radical chain reactions is suggested to be electron transfer from alkylcobalt(III) complexes to iodine atoms (I . ) which are produced by the photodissociation of I 2 , based on the formation of by-products that could arise only via electron-transfer processes as well as the kinetic comparison between alkylcobalt(III) complexes and tetra-alkyltin compounds. (elsevierpure.com)
Fundamental aspects of chemical reactions and complex molecular processes in extreme environments relevant is presented in a popular science presentation entitled "The molecular evolution of the universe" loosely based on the book chapter "Molecular awakenings" ("Molekylära uppvaknanden" in Swedish) in P. Persson, in Liv - Utomjordiskt, Syntetiskt, Artificiellt , J. Abbott and E. Persson (Eds. (lu.se)
Electron spectroscopy has provided much of our current knowledge on the chemical and physical processes involved in the complex interactions between a solid surface and its surroundings. (lu.se)
Intensive co-development of detailed simulations for complex signal- and background processes is crucial, such that the current, basic, modelling does not limit the potential of LDMX. (lu.se)
The resulting tools will allow rapid assessment of new reactions in the light DM paradigm by producing realistic final states of complex processes. (lu.se)
LDMX will also measure eN and γN processes. (lu.se)

We found that Zn 2+ yielded the highest enzyme complex thermostability (T m of 87 °C) and solvent tolerance. (rcsb.org)

The rapid assembly of complex scaffolds in a single step from simple precursors identifies as an ideal reaction in terms of efficiency and sustainability. (nature.com)
This asymmetric transformation harnesses dynamically formed complexes that assemble the precursors and forges valuable products carrying up to four new stereocentres with excellent enantio- and diasteroselectivities, in a synthetically ideal manner (Fig. 1c ). (nature.com)

Reaction of the metal dimer with 6-bromo-hex-1-ene suggests a free radical process and reactions with substituted benzyl bromides indicate an electron transfer step. (kingston.ac.uk)
Oxidized P-700 was rapidly reduced by the reduced cytochrome in all the PS I complexes that contained, at least, the psaC and psaD polypeptides and the second-order rate constants of electron transfer from cytochrome c-553 to P-700 were essentially the same between PS I complexes that contained the psaF polypeptide and those that lost this polypeptide. (elsevierpure.com)
High-valent metal-oxo complexes are produced by successive electron-transfer oxidation of metal complexes with one-electron oxidants in the presence of water, which is an oxygen source in the generation of the metal-oxo complexes. (ewha.ac.kr)
Thus, the oxidation of substrates using one-electron oxidants can be catalyzed by metal complexes via formation of high-valent metal-oxo complexes by the electron-transfer oxidation of metal complexes in the presence of water as an oxygen source. (ewha.ac.kr)

Light-harvesting 2 (LH2) and light-harvesting 1 - reaction centre (RCLH1) complexes purified from the photosynthetic bacterium Rhodobacter (Rba. (whiterose.ac.uk)
To explore the longevity of this novel nanoprinted photosynthetic unit, RCLH1 and LH2 complexes were cross-patterned on a glass surface and sealed under a protective argon atmosphere. (whiterose.ac.uk)
These bacterial 'organelles' are ideal model systems for studying how the organisation of the photosynthetic complexes therein shape membrane architecture. (uea.ac.uk)
Our results provide a structural basis for the close kinetic coupling between RC-LH1-PufX and cytochrome bc1 observed by spectroscopy, and explain how quinols/quinones and cytochrome c2 shuttle on a millisecond timescale between these complexes, sustaining efficient photosynthetic electron flow. (uea.ac.uk)

For the quantitative understanding of complex chemical reaction mechanisms, it is, in general, necessary to accurately determine the corresponding free energy surface and to solve the resulting continuous-time reaction rate equations for a continuous state space. (rsc.org)
A. G. Sykes and L. I. Elding, in Inorganic Reaction Mechanisms, ed. (rsc.org)

Herein, we present a broad strategy in which dynamically assembled ternary complexes are converted into valuable azabicyclic scaffolds based on the concept of inverse hydride shuttle catalysis. (nature.com)
Fig. 1: Harnessing dynamically formed ternary complexes through inverse hydride shuttle catalysis. (nature.com)
a , Dynamically assembled complexes with unexploited synthetic potential: reversible preorganisation into ternary complexes and interrogation of routes able to convert the ternary complex directly into a complex scaffold. (nature.com)

Transition metal acyl complexes describes organometallic complexes containing one or more acyl (RCO) ligands. (wikipedia.org)
This reaction requires that the acyl complex be coordinatively unsaturated: LnMC(O)R → Ln-1M(CO)R + L Ln-1MC(O)R → Ln-1M(CO)R The oxygen center of acyl ligands is basic. (wikipedia.org)
Based on 11 X-ray structures of AbHpaI complexed with M 2+ and ligands at 1.85 to 2.0 Å resolution, the data clearly indicate that the M 2+ cofactors form an octahedral geometry with Glu151 and Asp177, pyruvate, and water molecules. (rcsb.org)

sphaeroides, solar energy is converted via coupled electron and proton transfer reactions within the intracytoplasmic membranes (ICMs), infoldings of the cytoplasmic membrane that form spherical 'chromatophore' vesicles. (uea.ac.uk)
Kinetic and mechanistic investigation on the nature of proton transfer reactions at Pt centers - Kinetic and mechanistic investigatio n of proton migration between hydride, alkyl, and aryl groups that are bonded at the metal. (forskningsradet.no)

In the United States, two commercially available lab tests can be ordered by healthcare providers and processed through healthcare facilities to better characterize a severe allergic reaction. (cdc.gov)
Elevations in these test results can help characterize the severe allergic reaction. (cdc.gov)

Five PS I complexes isolated with an anionic detergent, sodium dodecylsulfate, contained zero to four small subunits but were all depleted of the psaF polypeptide. (elsevierpure.com)
Thus, the psaF polypeptide is not required for the bimolecular reaction between P-700 and cytochrome c-553. (elsevierpure.com)

Herres-Pawlis, Sonja 2021-07-30 00:00:00 [Bioinorganic copper complexes can activate dioxygen and transfer it to substrates under very mild reaction conditions. (sagepub.com)
Bioinorganic copper complexes can activate dioxygen and transfer it to substrates under very mild reaction conditions. (sagepub.com)
Then, metal-oxo complexes oxidize substrates to yield oxygenated substrates, accompanied by the regeneration of reduced metal complexes. (ewha.ac.kr)
Thus, the oxidation of substrates, including water oxidation, by weak oxidants can be catalyzed by metal complexes under photoirradiation of the photocatalyst using water as an oxygen source. (ewha.ac.kr)

Our kinetic approach supports the analysis of general reaction networks spanning multiple time scales, which is here demonstrated for the example of the formose reaction. (rsc.org)
An important application of our approach is the detection of regions in a reaction network which require further investigation, given the uncertainties introduced by both approximate electronic structure methods and kinetic models. (rsc.org)

Olefinic esters with a chain length of less than five carbon atoms inhibited reaction by association and deactivation of the catalyst. (soton.ac.uk)

Illustrative is the oxidative addition of acetyl chloride to Vaska's complex, converting square planar Ir(I) to octahedral Ir(III): IrCl(CO)(PPh3)2 + CH3COCl → CH3COIrCl2(CO)(PPh3)2 In rare cases, acyls can be produced from aldehydes by C-H oxidative addition. (wikipedia.org)

Fleeting cyclobutene intermediates are converted into complex frameworks with up to 99% yield, forming up to four new stereocentres with excellent enantioselectivity (up to 99% e.e. (nature.com)
Such compounds occur as transient intermediates in many industrially useful reactions, especially carbonylations. (wikipedia.org)

Other DNA and RNA enzymes that catalyze consecutive cleavage and strand-transfer reactions in a single active site may similarly require cation trafficking coordinated by the substrate. (rcsb.org)

Metal acyls are often generated by the reaction of low-valent metal centers with acyl chlorides. (wikipedia.org)

In practical sense, the most important reaction of metal acyls is their detachment by reductive elimination of aldehydes from acyl metal hydrides: LnMC(O)R(H) → LnM + RCHO This reaction is the final step of hydroformylation. (wikipedia.org)

In selected solvent environments photoinduced disproportionation generating short-lived Fe(iv) and Fe(ii) complex pairs that subsequently undergo bimolecular recombination was observed. (lu.se)
Overall, the photoinduced intermolecular charge separation efficiently outcompetes the intramolecular deactivation over a broad range of temperatures, highlighting the potential of [Fe III (phtmeimb) 2 ]PF 6 to perform photocatalytic bimolecular reactions. (lu.se)

Organic chemistry students and bench chemists alike rely on the Grignard reaction, a relatively simple way to make carbon-carbon bonds. (acs.org)

We use a combination of time-resolved spectroscopic measurements and computational simulations to investigate the dynamics of chemical reactions. (lu.se)

Another objective of this project will be to investigate by means of NMR the mechanism of reaction of selected Pt(IV)-complexes with other biomolecules such as glutathione and proteins (e.g. albumin), and to determine the effects of light on these reactions. (europa.eu)

py = pyridine), are readily cleaved by iodine in carbon tetrachloride to yield alkyl iodides via photoinduced radical chain reactions with large quantum yields (e.g. (elsevierpure.com)
Collecting blood earlier than 30 minutes after the reaction began could yield results that would be more difficult to interpret. (cdc.gov)

Reactive Bubbly Flows: Control of the Formation and Reaction of Copper-Oxygen Adduct Complexes in. (sagepub.com)
Reactive Bubbly Flows Control of the Formation and Reaction of Copper-Oxygen Adduct Complexes in Multiphase Streams %22&body=%0AI%20found%20an%20article%20you%20might%20be%20interested%20in. (sagepub.com)

Complementary high-resolution atomic force microscopy (AFM) of intact, purified chromatophores verifies the close association of cytochrome bc1 complexes with RC-LH1-PufX dimers. (uea.ac.uk)
All the dimers, except (M[sub]2(CO)[sub]10) (M = Mn, Re), reacted with benzyl bromide giving the corresponding bromo-complexes. (kingston.ac.uk)

Cholesterol is measured enzymatically in serum or plasma in a series of coupled reactions that hydrolyze cholesteryl esters and oxidize the 3-OH group of cholesterol. (cdc.gov)

DMSO exchange reactions (in DMSO) of [PtenDMSOX]+ were found to be slightly slower than the solvolysis reactions, iodide again giving rise to the most labile system.Ion pair formation in DMSO was found to be modest to almost negligible with a formation constant of 30 M−1 in the case of [PtenDMSOCl]Cl as the largest. (ruc.dk)
Pulsed lasers proved to be advantageous tools for the stimulation of pattern formation in complex systems. (uni-marburg.de)
Repeated laser stimulation was demonstrated to be a powerful method that enables selective adjustments of material properties emergent in the course of self-organized pattern formation in complex systems. (uni-marburg.de)
Considering the simplicity of the generation process this demonstrates the viability of nature's low-effort-high-outcome-principle of order formation in complex systems. (uni-marburg.de)
In conclusion, it can be stated that the concept of nature to trigger selective reorganizations and pattern formation in complex systems can be imitated in its principles. (uni-marburg.de)
The ratio of these products varied both with, the mode of formation of the Ni(O) complex and the associated organophosphine. (soton.ac.uk)
The reaction of Fe(CO) 2 (PPh 3 ) 3 with COS in toluene results in the formation of Fe(CO) 3 (PPh 3 ) 2 and SPPh 3 . (northwestern.edu)
Together, our work identified Bonus as a regulator of tissue-specific gene expression and revealed the importance of SUMOylation as a regulator of complex formation in the context of transcriptional repression. (elifesciences.org)

The Bee Creek Sports Complex features five synthetic turf fields that can host a wide variety of athletic events and competitions. (kxan.com)
However, where ARMAH 2 possesses a lengthy alkyl sidechain trace amounts of Δ-α-[Co(R,R-picchxn)(ARMA)] + isomers have been observed during the synthetic reactions. (edu.au)

Chiral metal complexes. (edu.au)
Dive into the research topics of 'Chiral metal complexes. (edu.au)
In a related reaction, metal carbonyl anions are acylated by acyl chlorides: (C5H5)Fe(CO)2Na + CH3C(O)Cl → (C5H5)Fe(CO)2COCH3 + NaCl Another important route to metal acyls entails insertion of CO into a metal alkyl bond. (wikipedia.org)
In all cases, halo-complexes were formed, however, the observation of the associated benzyl complexes depended on both the benzyl halide and the metal dimer. (kingston.ac.uk)
The first step in the Shilov system is the reaction of a Pt metal center with the C-H bond to pr ovide a Pt-C bond and a proton. (forskningsradet.no)
This project focuses on the essential proton transfer reaction to and from the metal. (forskningsradet.no)

There are no specific lab tests that can definitively diagnose the cause of a severe allergic reaction (e.g., anaphylaxis) following COVID-19 vaccination. (cdc.gov)
These samples should only be collected after medically stabilizing a patient who has experienced a severe allergic reaction. (cdc.gov)
These lab tests can be transiently elevated shortly after a severe allergic reaction. (cdc.gov)
A second sample for tryptase could be obtained 24 hours or more after the severe allergic reaction, or even weeks after the reaction. (cdc.gov)
This tryptase level obtained 24 hours or more after the severe allergic reaction reflects the patient's typical tryptase level and can aid in the assessment of the allergic reaction. (cdc.gov)
Consultation with a specialist (e.g., allergist-immunologist) within the weeks after the severe allergic reaction can help healthcare providers further evaluate potential factors that might have contributed to the development of the allergic reaction in these individuals. (cdc.gov)

The clinical reaction time assessment device consists of a long, lightweight stick attached to a rectangular box at one end. (michiganmedicine.org)

Spectral imaging and fluorescence life-time imaging microscopy (FLIM) revealed that RCLH1 and LH2 complexes, sealed under physiological conditions, retained their native light-harvesting and energy transfer functions. (whiterose.ac.uk)

In a Grignard reaction, a carbon-bonded magnesium halide adds to a carbonyl group to form an alcohol. (acs.org)

Monometallic acyl complexes adopt one of two related structures, C-bonded and η2-C-O-bonded. (wikipedia.org)

By the choice of ligand, the rate of oxygen activation, stability of the Cu/O2 species and rate of subsequent reaction can be tuned. (sagepub.com)

Reaction Dynamics of Complex Nuclei at Low Energy within a Molecular Picture, Frontiers in Nuclear and Particle Physics Progress of Time-Dependent Nuclear Reaction Theory (2019) 2: 132. (eurekaselect.com)

The research shows that whichever pathway the reaction takes, it's not just the reactant and substrate that matter: "The number and movements of attached solvent molecules play a supporting role in the mechanism," says Grignard-reaction expert Robert E. Mulvey of the University of Strathclyde. (acs.org)

Atomic force microscopy (AFM) images of the RCLH1 and LH2 patterns show the deposition of monomolecular layers of complexes on the glass substrate. (whiterose.ac.uk)

Also, healthcare providers or health departments in the United States can request a consultation from CISA COVIDvax for a complex COVID-19 vaccine safety question that is (1) about an individual patient residing in the United States or vaccine safety issue and (2) not readily addressed by CDC or Advisory Committee on Immunization Practices (ACIP) guidelines. (cdc.gov)

Mechanistic study on the coupling reaction of aryl bromides with arylboronic acids catalyzed by (iminophosphine)palladium(0) complexes. (rsc.org)

The subject catches it as quickly as possible and the device provides a display of the elapsed time between drop and catch, which serves as a measurement of simple reaction time. (michiganmedicine.org)
SC5b-9 (terminal complement complex) is a measurement of complement system activation. (cdc.gov)
The method uses sulfated alpha-cyclodextrin in the presence of Mg +2 , which forms complexes with apoB containing lipoproteins, and polyethylene glycol-coupled cholesteryl esterase and cholesterol oxidase for the HDL-cholesterol measurement. (cdc.gov)

Such adverse events include both true reactions to vaccine and events coincidental to, but not caused by, vaccination. (cdc.gov)

Whether photoactivated Pt-species induce protein-DNA cross-linking reactions will also be investigated. (europa.eu)
The isomeric species in the complex products have been separated using cation exchange chromatography and each isomer has been characterized using NMR and circular dichroism techniques. (edu.au)

Substitution1

Ruthenium complexes2

Abstract2

Synthesis7

Photochemistry5

Transition metal complexes1

Catalytic3

Iron complexes1

Excitation energy3

Carbene1

Photochemical2

Acetaldehyde2

Processes7

Enzyme1

Precursors2

Electron transfer4

Photosynthetic4

Mechanisms2

Ternary3

Ligands3

Proton transfer reactions2

Characterize2

Polypeptide2

Substrates4

Kinetic2

Atoms1

Oxidative1

Intermediates2

Enzymes1

Centers1

Aldehydes1

Bimolecular2

Organic1

Simulations1

Proteins1

Yield2

Copper2

Dimers2

Oxidize1

Formation8

Synthetic2

Metal6

Allergic6

Assessment1

FLIM1

Halide1

Structures1

Subsequent reaction1

20191

Pathway1

Microscopy1

Readily1

Mechanistic1

Measurement3

Vaccine1

Species2