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Showing 1 to 20 of 34 for “"Mechanism of Formation"”.
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The Mechanism of Formation of Pi-Allyl Palladium-Chloride Complexes From Olefins
The reaction of ${\rm PdCl}\sb2$ with olefins bearing allylic hydrogens to give $\pi$-allyl palladium complexes is accepted to be a two-step process. Previous workers reported isolation of the presumed $\pi$-olefin complex intermediates and their conversion to $\pi$-allyl complexes under typical …
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The Vaccinia Virus A56/Vcp Complex: Mechanism of Formation and Implications for Virulence
… new infectious particles as well as a myriad of proteins dedicated to combating the host’s immune response. Although these proteins are often called “non-essential”, they are frequently needed for the virus to achieve maximum virulence in vivo. Two of these proteins are the vaccinia complement …
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The Heme-Lysine Cross-Link of Cytochrome P460: Effects on Catalysis and Mechanism of Formation
… (NO). What makes HAO unique is the presence of a P460 cofactor, which has been observed in only one other known protein family: cytochrome (cyt) P460. The P460 cofactor is a modified c-heme based cofactor that contains a post-translational modification in the form of a cross-link from the …
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Investigation on the Mechanism of Formation and Consumption of Vinylcobalamins Involved in Vitamin B(12)-Catalyzed Reductive Dechlorination of Perchloroethylene
… the vitamin B12-catalyzed dechlorination of PCE. Chlorovinylcobalamin 16, previously detected in the PCE dechlorination reaction, was synthesized by treating cob(I)alamin with chloroacetylene. The structure of 16 was confirmed by X-ray crystallography, and is the first reported structure …
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ΑΝΑΠΤΥΞΗ LASER ΜΟΡΙΑΚΟΥ ΦΘΟΡΙΟΥ ΚΑΙ ΦΩΤΟΔΙΑΣΠΑΣΗ ΤΟΥ HGBR2 ΣΤΑ 157 ΝΜ
… FOR THE SPECIFIC OPERATING CONDITIONS OF DURING THE IRRADIATION OF HGBR2 WITH A MOLECULAR FLUORINE LASER, THE MOLECULE IS EXCITED IN ITS 21Σ+4 EXCITED STATE AND PHOTODISSOCIATES IN HGBR(C) + BR(2P). THE ABSORPTION OF AN ADDITIONAL PHOTON BY THE C STATE OF THE HGBR FRAGMENT IS …
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Formation of Environmentally Persistent Free Radicals on the Surface of Iron Oxide and Interior of Montmorillonite Clay
… persistent free radicals (EPFRs) are a new class of pollutants known to damage the lungs and heart, as well as catalyze the formation of toxic compounds such as dioxins and furans. EPFRs are known to form on metal oxide nanoparticles’ surface, including iron (III) oxide, and within cation-rich …
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Interfacial Study of Copper Electrodeposition with the Electrochemical Quartz Crystal Microbalance (EQCM)
… (EQCM) has been proven an effective mean of monitoring up to nano-scale mass changes related to electrode potential variations at its surface. The principles of operation are based on the converse piezoelectric response of quartz crystals to mass variations on the crystal surface. In this …
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Factors Affecting Size and Swelling of Poly(ethylene glycol) Hydrogel Microspheres Formed in Aqueous Sodium Sulfate Solutions
… critical solution temperature: LCST) behavior of poly(ethylene glycol): PEG) in aqueous sodium sulfate solutions was exploited to fabricate hydrogel microspheres under mild conditions without the use of other monomers, polymers, surfactants or organic solvents. Reactive PEG derivatives …
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Síntesis de nanoestruturas metálicas de oro y plata a partir de precursores organometálicos: Propiedades plasmónicas y catalíticas
… to the synthesis, characterization and study of the plasmonic and catalytic properties of gold or silver metal nanoparticles and gold-silver bimetallic nanoparticles, obtained through an organometallic approach, i.e. without the need of an external reducing agent and using organometallic …
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Broadening the scope of reactivity for neutral organic electron donors
Reduction and oxidation of functional groups are some of the fundamental transformations in inorganic and organic synthesis. Compound A has been shown to be a powerful neutral organic electron donor capable of the reductive bond cleavage of various σ-bonds. Photoactivation of donor A (to A*) has …
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Insights into formation of semiconductor nanocrystals : from first principles calculations to kinetic models of nucleation and growth
Over the past decade the synthesis of colloidal semiconductor nanocrystals of diverse shapes and sizes has sparked tremendous interest in both the industrial and scientific communities. Much of the work thus far has been done by extensive trial-and-error optimization of the chemistry to produce the …
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Propagation of Oligomeric α-Synuclein and Amyloid-β: Implications for Parkinson's and Alzheimer's Diseases
<p>The aggregation of amyloidogenic proteins is a critical event in the pathology of a variety of neurodegenerative diseases, including Alzheimer’s disease (AD) and Parkinson’s disease (PD). The proteins <strong>α</strong>-synuclein (<strong>α</strong>S) and amyloid-<strong>β …
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N.M.R. Studies of the Formation of Molecular Complexes in the Liquid Phase
… by nuclear magnetic resonance spectroscopy of complexes formed transiently between polar aliphatic molecules (solutes) and aromatic solvents. The complexes are studied by the use of 1H chemical shifts and spin-lattice relaxation times. The purpose of the work is to confirm the validity of …
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Mass Spectrometry Imaging: Looking Fruits at Molecular Level
… (MSI) is a MS-based technique. It provides a way of ascertaining both spatial distribution and relative abundance of a large variety of analytes from various biological sample surfaces. MSI is able to generate distribution maps of multiple analytes simultaneously without any labeling and does not …
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Gas Phase Studies of Molecular Clusters Containing Metal Cations, and the Ion Mobility of Styrene Oligomers
… divided into three parts. Part I deals with the mechanism of the self-initiated polymerization (or thermal polymerization) of styrene in the gas phase. In this work, we present the first direct evidence for the thermally self-initiated polymerization of styrene in the gas phase. Our approach is …
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Porphyrin metabolism in congenital erythropoietic porphyria
… I have been isolated from the urine and plasma of patients with congenital erythropoietic porphyria (CEP) by high-performance liquid chromatography and characterized by liquid secondary ion mass spectrometry and chemical properties. The physico-chemical properties of these compounds have been …
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1,1-enediamines and β-substituted enamines in heterocyclic synthesis
… olefines) and their reactions, leading to the formation of a number of heterocycles. Various ~-substituted enamines were prepared by a 'one pot synthesis' in which a l,l-enediamine presumably acts as an intermediate. These enamines, various substituted crotonamides and propenamides, were made …
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Electrostatic control of Cu, Zn superoxide dismutase aggregation in Amyotrophic Lateral Sclerosis : from lysine modification to interaction with lipid membranes.
… from oxidative stress via disproportionation of superoxide ions. Misfolding and subsequent aggregation of SOD1 is casually linked to familial and sporadic cases of amyotrophic lateral sclerosis (ALS). Symptoms of ALS included weakness in arms and legs and respiratory failure, which leads to …
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