theory of quantum electron transport through molecules as the bases of molecular devices
dynamical symmetries for nanostructures implicit symmetries in single-electron transport through real and artificial molecules
... At the focus of all these studies stands the symmetry group of the underlying Hamiltonian Using the powerful formalism of group theory, the energy spectrum of the physical system possessing the ... permutation of two hydrogen atoms and should be classified in terms of even and odd combinations of wavefunctions ψ j , the double quantum well is asymmetric in the general case The measure of this asymmetry ... irreducible tensor Kτ of the 2nd rank in the expansion (2.8) Five components of this tensor together with the operators L j of the invariance group SO(3) form the set of generators of the dynamical group...
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Modeling and simulation of electron transport through nanoscale heterojunctions
... microscopic theory for transport problems [25] It was hypothesized more than 150 years ago before the dawn of quantum mechanics The Boltzmann’s kinetic equation was the first to propose the evolution of ... both of the leads are superconducting Superconductivity is the result of the instability of the Fermi surface from which a completely new phase of the system appears under the influence of strong ... semiclassical theory Before the BCS theory, the Ginzburg-Landau theory provided an enormous insight into the nature of superconductivity by introducing a position dependent parameter ψ which gives the measure...
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Báo cáo hóa học: " Optimization of an Electron Transport Layer to Enhance the Power Conversion Efficiency of Flexible Inverted " ppt
... On the other hand, resistance of the seed layer increased with increasing thickness As a result, the Jsc of the device increased up to the optimum film thickness, after which it began to decrease ... resistance, as shown in Fig Consequently, the PV performance of the device varied in the same way Thus, an optimization process was necessary with respect to the thickness of the electron transport ... threefold increase in PV performance compared with that of a device consisting of a ZnO seed layer without ZnO NRs The optimization of the electron transport layer in the present work is one of the most...
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Tài liệu Chapter XX Quantum theory of light pdf
... is there a limit frequency ) 2.2 Einstein’s quantum theory of light: To overcome the difficulty of classical physics, Albert Einstein introduced the quantum theory of light, and developed the ... classical physics !! But on the basis of the photon model of light one has a satisfactory explanation of this effect 3.2 Compton effect as the result of photon -electron collision: On the basis ... well with the experimental laws for the blackbody radiation Planck’s hypothesis is recognised as the beginning of a new theory, the quantum theory • In 1905 Einstein developed an analogue theory...
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Quantum statistical theory of superconductivity
... surface at K Theoretically much of the band theory of solids24 and the microscopic theory of superconductivity are based on this model The occurrence of superconductors critically depends on the Fermi ... several years after the BCS theory By 1964 the general consensus was that the BCS theory is an essentially correct theory of superconductivity 30 1.4.4 Quantum Statistical Theory; Independent ... absolute square of the wave function: (2.1.6) then is lattice-periodic That is, the probability distribution function for the electron has the same periodicity as that of the lattice The associated...
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Tài liệu Báo cáo khoa học: Structural and mechanistic aspects of flavoproteins: electron transfer through the nitric oxide synthase flavoprotein domain pdf
... influence the rate of electron import into the FMN subdomain and the resulting formation of FMNH2 The extent to which KeqA or the rate of FMNH2 formation influences electron flux through the NOS ... formation in limiting electron flux through the CaM-bound NOS enzymes In general, as the kon and koff of equilibrium A increase, it becomes more probable that the rate of electron input (specifically, ... The model predicts that there is always a Keq position for maximum electron flux through the enzyme On either side of this optimum, the electron flux drops off because either the formation rate (k2)...
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Tài liệu Báo cáo khoa học: Reconstitution of coupled fumarate respiration in liposomes by incorporating the electron transport enzymes isolated from Wolinella succinogenes docx
... Succinate eị The substrate sites of hydrogenase and of formate dehydrogenase are exposed to the bacterial periplasm, whereas that of fumarate reductase faces the cytoplasm (Fig 1) [1,11] From the crystal ... formate, the reduction of the MK present in the proteoliposomes interfered with the measurement of fumarate reduction Therefore, the velocity of MK reduction was recorded at 270 nm upon mixing of the ... model of the oxidized enzyme, a cavity was discovered which extends from the hydrophobic phase of the membrane, close to the distal heme group of FrdC to the periplasmic aqueous phase [37] The...
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Báo cáo khóa học: Identification of residues controlling transport through the yeast aquaglyceroporin Fps1 using a genetic screen ppt
... regarding the importance of the pronounced secondary structure in this region Mutation of either proline could result in reduction or increase in the length of the helical secondary structure of the ... Gln227 on the N-loop to regulate normally In the model, where the beginning and end of the N-loop region are aligned so that they face TMD1 as much as possible, and with the NPQ turn of the B-loop ... xylitol and in contrast to all other mutations even allowed growth in the presence of M of the C6 polyol D-sorbitol As all other mutations in the C-terminal extension occur much further upstream and...
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Báo cáo khoa học: Copper-containing nitrite reductase fromPseudomonas chlororaphis DSM 50135 Evidence for modulation of the rate of intramolecular electron transfer through nitrite binding to the type 2 copper center pot
... density, the concentrations of nitrate [17] and nitrite [18], the pO2 and the pH of the medium were monitored, and the composition of the gaseous phase in the fermentor was analyzed by mass spectrometry ... of its oxygen atoms and the Asp98 residue After reduction of the T2Cu center with an electron from the T1Cu center, the proton of this hydrogen bond is transferred from the Asp98 residue to the ... Biochem 271) from the electrode and donates them to the Nir, in the presence of nitrite Under these conditions, the shape of the voltammogram becomes sigmoidal, with an increase of the cathodic current...
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Báo cáo khoa học: Re-evaluation of the function of the F420dehydrogenase in electron transport ofMethanosarcina mazei potx
... of F420 with Fdred as the substrate was found to occur in the cytoplasm of the parental strain and of the DfpoAO and the Dech mutants However, this activity was essentially absent in the DfpoF ... lysates of the DfpoA-O mutant or the DfpoF mutant was in the range of mUặmg)1 of protein and hence 10-fold higher than the rate of H2 production from F420H2 in the absence of CoM-S-S-CoB The H2 ... with the parental strain (that has a doubling time of 7.7 h) with trimethylamine as the substrate The nal D of the cultures were almost identical In summary, the electron transport deciency of the...
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Báo cáo khoa học: cAMP increases mitochondrial cholesterol transport through the induction of arachidonic acid release inside this organelle in Leydig cells pdf
... cells [24,25] For these reasons, the objective of the present work was to study the release of AA into the mitochondria and a possible direct role of fatty acids on cholesterol transport in this ... in the presence of CHX, the fatty acid bypasses the absence of ACS4 but not the absence of StAR Then, the partial inhibition produced by CHX on AA stimulated steroidogenesis was unexpected The ... release AA inside the mitochondria is shown by the fact that the content of labeled AA in another organelle such as the nucleus is neither increased by cAMP nor reduced by the inhibition of Acot2...
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Kinematical theory of spinning particles classical and quantum m rivas
... Representation in the C.M frame of the motion of the center of mass of an electron- positron pair, producing a bound state Motion of the center of charge of the system (3.97) around the C.M Motion of the center ... behaves according to the laws of quantum mechanics The finer the classical analysis of basic objects of matter, the richer will be their quantum mechanical description The quantum mechanical picture ... φ ) of angular velocity ω Motion of the center of charge and center of mass of a negative charged particle in a uniform magnetic field The velocity of the center of mass is orthogonal to the...
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Quantum gravity, generalized theory of gravitation, and superstring theory based unification mintz,perlmutter
... unified field theory is a consequence of, as a result of the expansion of the universe, increasing size of r0 In this theory there exists no free monopoles all of them as a result of monopole condensation ... suggesting the addition of further degrees of freedom to yield a quantum field theory with conformal invariance This has the virtue of possessing naturalness in the sense of 't Hooft [7] since zero masses ... electrodynamics The reason for the complicated procedure adopted by Schrödinger was due to the fact that his version of the non-symmetric generalization of the general theory of relativity did not include the...
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The raman effect a unified treatment of the theory of raman scattering by molecules derek a long
... 0-470-84576-7 (Electronic) Part One THEORY A unified treatment of the theory of Raman scattering by molecules The Raman Effect: A Unified Treatment of the Theory of Raman Scattering by Molecules Derek ... before the interaction, is defined as Ei , and in its final state f, after the interaction, as Ef The energy of the ground electronic state of the molecule will be defined as Eg and the energy of an ... The scattered intensity is proportional (a) to the square of the number of scattering molecules and (b) to the square of the irradiance of the incident radiation at ω1 and to the irradiance of...
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Báo cáo Y học: The mitochondrial-lysosomal axis theory of aging Accumulation of damaged mitochondria as a result of imperfect autophagocytosis ppt
... features of aging A number of early explanations of aging, such as Orgel’s error catastrophe theory and the somatic mutation theory, were based on the idea that aging results from the accumulation of ... postmitotic cells, one of the most prominent signs of aging, has been known for more than 150 years [28] However, the relation of lipofuscin to lysosomes and the basic mechanisms of lipofuscin formation ... such as cytochromes and ferritin, results in the release of redox-active low-molecularmass iron The latter, in ferrous form, reacts with hydrogen peroxide (which easily diffuses throughout the...
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Báo cáo khoa học: Effect of magnesium ions on the activity of the cytosolic NADH/cytochrome c electron transport system pptx
... was already present in the hypotonic medium before the addition of mitochondria (Mg-m), the release of cyto-c was significantly lower and amounted to 21% (the additional release was only 7%) The ... in Fig on the oxidation of exogenous NADH as the expression of the activity of the complete system Discussion The data presented provide new insights into the role of magnesium ions in the permeability ... per milligram of protein of the NADH/cyto-b5 complex should be independent of the osmolarity of the medium, the increase in the binding of cyto-c with hypotonic mitochondria and the insensitivity...
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introduction to the electron theory of metals
... of the electron theory of metals In this section, the reader is expected to grasp only the main historical landmarks of the subject without going into details The electron theory of metals has ... become one of the most exciting and challenging topics in the field of the electron theory of metals Originally, the electron theory of metals was constructed for crystals where the existence of a periodic ... survey of the electron theory of metals overlapping continuous bands The resulting electronic structure affects significantly the observed electron transport phenomena The electron theory of metals...
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