Browsing Τμήμα Χημείας / Department of Chemistry by Title
Now showing items 1213-1232 of 1302
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Article
Transient kinetic study of the reaction of CH4 and C2H6 with the lattice oxygen of Li+-doped TiO2 catalyst
(1993)A transient kinetic study of the reaction of CH4/He and C2H6/He with the lattice oxygen of Li+-doped TiO2 catalyst was performed. The results obtained indicate that lattice oxygen species must be considered as oxidation ...
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Article
Transient methods in heterogeneous catalysis: Experimental features and application to study mechanistic aspects of the CH4/O2 (OCM), NH3/O2 and NO/He reactions
(1997)Experimental features of the transient method using concentration forcing functions to study the surface dynamics of a heterogeneous catalytic reaction at 1 atm and with on line mass spectroscopy are discussed. Emphasis ...
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Article
Transient sorption and desorption studies of cyclopropane and propylene with Cs/NaX and Ni/NaX zeolites
(1992)Transient diffusion and sorption experiments of cyclopropane and propylene in Cs+and Ni2+ ion-exchanged Zeolites X in a flow microreactor reveal that the nature of the diluent gas affects the kinetics of intracrystalline ...
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Book Chapter
Transient Techniques: Temporal Analysis of Products and Steady State Isotopic Transient Kinetic Analysis
(Wiley-VCH, 2012)
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Conference Object
Transmission electron microscopy of steam activated viscose rayon chars
(Publ by Electrochemical Soc Inc, 1991)It was established that TEM could be employed to provide complementary data on the nature of the pores formed, in particular, their size, shape and distribution within the fibre cross-section. It was found that the borate ...
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Article
The trapped human experiment
(2011)This experiment observed the evolution of metabolite plumes from a human trapped in a simulation of a collapsed building. Ten participants took it in turns over five days to lie in a simulation of a collapsed building and ...
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Article
Triangular NiII2LnIII and Ni II2YIII complexes derived from di-2-pyridyl ketone: Synthesis, structures and magnetic properties
(2011)The synthetic investigation of the NiII/M(NO3) 3·6H2O/di-2-pyridyl ketone [(py)2CO] tertiary reaction system in EtOH has yielded triangular Ni2M cationic complexes (M = lanthanide, Y). The reaction between Ln(NO3) 3·6H2O, ...
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Article
Tricyclo[3.3.1.03,7]nonane-3,7-diyl bis(methanesulfonate)
(2010)The crystal structure of the title compound, C11H 18O6S2, was determined to investigate the effect of the eclipsed mesyl groups on the bond length of the vicinal quaternary C atoms. The two quaternary C atoms of the ...
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Article
Triggering selective uranium separation from aqueous solutions by using salophen-modified biochar fibers
(2018)Salophen modified biochar fibers derived from Luffa cylindrica sponges were prepared and subsequently studied as a potential U(VI) adsorbent by batch-type experiments. The material was characterized by spectroscopic and ...
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Article
Turbidimetric Titration Study of the Interaction of Proteins with Acrylic Polyampholytes
(1995)A study of the interaction of proteins [soybean trypsin inhibitor (0.3–1 mg/mL)] with dilute solutions of synthetic polyampholytes (0.05–0.4 mg/mL) composed of acrylic (or methacrylic) acid, (dimethylamino)ethyl methacrylate, ...
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Article
Two isomeric [Mn12O12(OMe)2(O 2CPh)16(H2O)2]2- single-molecule magnets and a MnIII polymer prepared by a reductive aggregation synthetic route
(2005)We describe a new synthetic procedure in Mn cluster chemistry involving reductive aggregation of permanganate (MnO4-) ions in MeOH/benzoic acid solution and the first two products that were obtained from this procedure. ...
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Article
Two ligand-binding sites in the O2-sensing signal transducer HemAT: Implications for ligand recognition/discrimination and signaling
(2006)We have identified a ligand (CO) accommodation cavity in the signal transducer sensor protein HemAT (heme-based aerotactic transducer) that allows us to gain single-molecule insights into the mechanism of gas sensor proteins. ...
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Article
Two new coordination polymers containing the triangular [Mn3O(O2CR)6]0/+ units
(2008)The preparation and crystal structures of two linear chain compounds of oxo-centered triangular Mn clusters are reported. {[Mn4O(O2CMe)8(py)] · 2MeCN}∞ (1 · 2MeCN)∞ was formed when a concentrated solution of [Mn3O(O2CMe)6(py)3] ...
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Article
Two-step conversion of 3,4,4,5-tetrachloro-4H-1,2,6-thiadiazine into 4,5,6-trichloropyrimidine-2-carbonitrile
(2017)Tin reduction of 3,4,4,5-tetrachloro-4H-1,2,6-thiadiazine afforded perchloro-9-thia-1,5,8,10-tetraazaspiro[5.5]undeca-1,4,7,10-tetraene (10%) and 3,5-dichloro-4H-1,2,6-thiadiazine-4-thione (27%), the structures of which ...
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Article
A two-step reaction mechanism of oxygen release from Pd/CeO2: Mathematical modelling based on step gas concentration experiments
(2004)A mathematical model was developed to study the transient release of oxygen from a 1 wt % Pd/CeO2 catalyst in the 450°-550°C range based on alternate step concentration switches between CO and O2. The proposed mathematical ...
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Article
Two-step total syntheses of Canthin-6-one alkaloids: New one-pot sequential Pd-catalyzed Suzuki-Miyaura coupling and Cu-catalyzed amidation reaction
(2010)"Chemical Equation Presented" Canthin-6-one (1) and nine analogues including the naturally occurring 9-methoxycanthin-6-one (2) and amaroridine (3) are prepared rapidly and in high yields via a convergent "non-classical" ...
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Article
U(VI) adsorption by biochar fiber–MnO2 composites
(2019)The removal of U(VI) by biochar fibers from aqueous solutions has been investigated prior and after MnO2 surface-deposition. The removal efficiency has been studied as a function of pH, U(VI) concentration, ionic strength, ...
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Article
U(VI) mono-hydroxo humate complexation
(2007)The complexation of the uranyl ion with humic acid is investigated. The humic acid ligand concentration is described as the concentration of reactive humic acid molecules based on the number of humic acid molecules, taking ...
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Article
Understanding the synergistic catalytic effect between la2O 3 and CaO for the CH4 Lean De-NOx reaction: Kinetic and mechanistic studies
(2005)Doping of La2O3 crystallites with Ca2+ ions significantly enhances the intrinsic rate of NO reduction by CH4 in the presence of 5% O2 at 550°C compared to pure La 2O3 and CaO solids, while the opposite is true after doping ...
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Article
Unexpected formation, X-ray structure, and characterization of the triangular [Ti3O(OMe)6(σ5-C 5H5)3](I3) complex from hydrolysis and methanolysis of [Ti(σ5-C5H5) 2I2]
(2011)A convenient route has been developed for the formation of [Ti IV3O(OMe)6(σ5-C 5H5)3](I3) (2) involving methanolysis (and possibly hydrolysis) of species derived from titanocene diiodide, [TiIV(σ5-C5H5) 2I2] (1), under ...