fowler nordheim field emission from quantum confined iii v semiconductors in the presence of light waves
THE INFLUENCE OF ELECTROMAGNETIC WAVE ON THE RELATIVE MAGNETORESISTANCE IN QUANTUM WELLS WITH PARABOLIC POTENTIAL IN THE PRESENCE OF MAGNETIC FIELD
... the case of the RMR in the bulk semiconductor when the confinement frequency (ωo ) reaches to zero The Eq.(23) shows the dependence of the RMR on the external fields, including the EMW In the next ... → The frequency of the acoustic phonon is low so we can skip ω− q in the delta function in the Eq.(5) Considering the distribution of phonons to be symmetric, in the presence of the magnetic field, ... RMR in the quantum well We see that the RMR in this case depends on some parameters such as : the intensity of electromagnetic waves, the magnetic field B, the frequency of the radiation, the...
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fowler-nordheim field emission effects in semiconductor nanostructures
... 184 xvi Part II Contents Fowler Nordheim Field Emission from QuantumConfined III V Semiconductors in the Presence of Light Waves Field Emission from Quantum- Confined III V Semiconductors in the Presence ... investigated The Part II contains the solo Chap and investigates the in uence of light waves on the FNFE from III V compounds covering the cases of magnetic quantization, quantum wires, effective mass ... nanotubes in the presence of intense electric field and the importance of the measurement of band-gap of optoelectronic materials in the presence of light waves have also been discussed Chapter contains...
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THE ACOUSTOMAGNETOELECTRIC CURRENT OF a RECT ANGULAR QUANTUM WIRE WITH AN INFINITE POTENTIAL IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD
... properties of quantum wire material We have obtained the AME current I in the RQW with an infinite potential in the presence of an external magnetic field The dependence of the expression for the AME ... area of the RQW The curve of the AME current I strongly increases when the low temperature and the large value range of the acoustic wave number qz The value of the AME current I is zero (the ... analytically investigated the possibility of the AME effect in the RQW with an infinite potential We have obtained analytically expressions for the AME effect in the RQW with an infinite potential for the...
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ON THE HALL EFFECT IN PARABOLIC QUANTUM WELLS WITH AN IN PLANE MAGNETIC FIELD IN THE PRESENCE OF a STRONG ELECTROMAGNETIC WAVE (LASER RADIATION)
... values of the dc electric field E1 , respectively; the necessary parameters involved in the computation are the same as those in Fig In Fig we can see that the dependence of the HC on the amplitude ... other values By using the computational program we easily determine the position of the peak in each curve All the peaks correspond to the ωc2 + ωz2 = Ω values of magnetic field satisfying the ... conductivity as well as the Hall coefficient utilizing the quantum kinetic equation method in the presence of a strong EMW II.2 Expressions for the Hall conductivity and the Hall coefficient In the presence...
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Tài liệu Báo cáo khoa học: Suppressed catalytic efficiency of plasmin in the presence of long-chain fatty acids Identification of kinetic parameters from continuous enzymatic assay with Monte Carlo simulation ppt
... identify the site of action of the fatty acids in the plasmin molecule, the amidolytic activity of two truncated plasmin variants was examined (Fig 8) Miniplasmin (des-kringle 1-4 plasmin) contains the ... product in the presence of stearate (Fig 5B) In line with earlier observations [6], no autocleavage of plasmin was seen during the activity assay in the presence of enzyme substrate (Fig 5, insets) ... are the rate constants for inactivation of the respective forms of the enzyme In independent measurements with fatty acids we showed that the inactivation of free plasmin for the duration of the...
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Tài liệu Báo cáo khoa học: Crystal structure of thiamindiphosphate-dependent indolepyruvate decarboxylase from Enterobacter cloacae, an enzyme involved in the biosynthesis of the plant hormone indole-3-acetic acid doc
... by the PYR domains from one subunit and the PP domains of the other subunit within the dimer ThDP adopts the V- conformation [30,31] and is completely buried in the cofactor binding cleft Several ... responsible for binding and proper orientation of the aminopyrimidine ring, are conserved in all ThDP-dependent enzymes One of these, the hydrogen bond between the N1¢ atom of the pyrimidine ring of ThDP ... cofactor to the surface of the protein The entrance of the active site cleft is covered by the C-terminal helix and this part of the polypeptide chain must move in order to allow entry of the substrate...
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báo cáo hóa học: " Topological confinement in an antisymmetric potential in bilayer graphene in the presence of a magnetic field" pptx
... y-component of the wavelength ky = ky l and (b,d) the external magnetic field B0 The inset in (a) shows the wavespinors for kyl = proximity of an antikink induces a strong dependence of the states on the ... of the states in the kink potential In a semiclassical view, the movement of the carriers is constrained by the potential, which prevents the formation of cyclotron orbits We also calculate the ... transition In contrast to the single kink profile the shift in the intragap energies of the kink-antikink potential leads to a non-zero value for the oscillator strength at ky = (red solid curve in (a))...
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Báo cáo hóa học: "Enhanced Field Emission from Argon Plasma-Treated Ultra-sharp a-Fe2O3 Nanoflakes" pdf
... be further confirmed by other characterization methods To further reveal the in uence of the Ar plasma treatment on the structure of the surface and interior of the nanoflakes at an atomic level, ... average spacing between the electrodes (d = 100 lm in this work) and V is the applied voltage b was obtained to be 1,131 from the linear fitting of the F–N curve at turn-on area while that of Ar plasmatreated ... samples, indicating that the field emission from a-Fe2O3 nanoflake films follow the Fowler Nordheim (FN) relationship [21] The dots are experimental data and the solid lines are the fitted curves in accordance...
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Characteristics of Leachate from Citrus Groves and their Changes in the Collecting Reservoirs in Matsuyama, Japan
... above sea level The water in the stream is the leachate from the grove and it flows into a collecting reservoir at the foot of the hill The surface area of the reservoir is about 7300 m2 and the ... runoff characteristics of the materials from citrus grove were investigated and their behaviors in the collecting reservoirs were discussed The main results obtained from the investigation are as ... the sampling point St.4 is situated in the joined stream, which is the only stream that flows into the reservoir The reservoir water was also sampled from point Po in the reservoir close to the...
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Tài liệu Báo cáo Y học: The b-1,4-endogalactanase A gene from Aspergillus niger is specifically induced on arabinose and galacturonic acid and plays an important role in the degradation of pectic hairy regions pdf
... synergy of enzymes degrading the pectin side chains was studied [34] GALA had a positive effect on the activity of the other enzymes involved in the degradation of these side chains DISCUSSION A niger ... under the control of the xylanolytic activator protein [32,41] The increase in expression levels of galA in the CREA mutant, indicates that at least one of the detected putative CREA binding sites ... present in the eukaryotic b-1,4-endogalactanases Sequence analysis of the promoter of galA revealed the presence of several sequences possibly involved in the regulation of galA expression Putative...
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Tài liệu Báo cáo Y học: Identification of a set of genes involved in the biosynthesis of the aminonucleoside moiety of antibiotic A201A from Streptomyces capreolus pdf
... additional genes encoding other proteins implicated in the biosynthesis of the aminonucleoside moiety of A201A Here we report the sequencing of a total of 6946 bp, which include the ata genes most ... pertain to it Further sequencing of the ata cluster could provide an insight into the biosynthetic pathway of the other moieties of A201A and provide probes which may be useful to identify genes of ... puromycin nonproducing S alboniger mutants Identification of the function of a gene product may be achieved by a variety of assays including gene complementation of the relevant mutant in the organism...
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Tài liệu Báo cáo Y học: Antibacterial and antifungal properties of a-helical, cationic peptides in the venom of scorpions from southern Africa pptx
... Gramnegative bacteria, enabling the disruption of the outer membrane and facilitating the interaction of the toxin with the inner membrane In the presence of high Mg2+ ions, the MIC of compounds ... that there is a high conservation in amino acid sequence of the peptides in the venom of scorpions belonging to the same family, independent of the continent and region where they live In this ... active in inhibiting growth of Gram-negative bacteria and melittin is only active against three of the Gram-negative bacteria at the concentrations tested However, melittin is the most active in...
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Báo cáo khoa học: Crystal structure of salt-tolerant glutaminase from Micrococcus luteus K-3 in the presence and absence of its product L-glutamate and its activator Tris pdf
... determined the F structure containing the truncated region of the C-terminal domain; however, we failed to determine the structure of the intact glutaminase because the crystals exhibited heavy twinning ... 428 aa; nine aa in total) were located near the interface of the physiological dimer The Cterminal domain may contain structural features involved in protein–protein interactions to form the physiological ... (disordered in the ligand-free state in YbgJ) In the absence of the ligand, the lid part is separated from the active site, which leads to a more open active site Upon the binding of ligand in the acyl-enzyme...
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Báo cáo khoa học: Identification and characterization of 1-Cys peroxiredoxin from Sulfolobus solfataricus and its involvement in the response to oxidative stress pdf
... important in determining the level of Bcp2 protein Similar results are observed for genes and related proteins involved in oxidative stress in other microrganisms [24] Moreover, the basal level of bcp2 ... clarified in detail and could play a key role in the detoxification processes In this study we examined the role of Bcp2 in order to increase the knowledge of the enzymatic activity involved in the ... types of thioredoxins were found In this study we examined the involvement of the peroxiredoxin Bcp2 in oxidative stress in the hyperthermophilic aerobic archaeon Sulfolobus solfataricus Furthermore,...
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![Báo cáo khoa học: Assignment of the [4Fe-4S] clusters of Ech hydrogenase from Methanosarcina barkeri to individual subunits via the characterization of site-directed mutants pdf](https://media.store123doc.com/images/document/14/rc/do/small_dor1394202044.jpg)
Báo cáo khoa học: Assignment of the [4Fe-4S] clusters of Ech hydrogenase from Methanosarcina barkeri to individual subunits via the characterization of site-directed mutants pdf
... subunit of complex I carries a significant part of the quinone binding pocket and that this binding pocket could have evolved directly from the [Ni-Fe] centre binding site of the hydrogenases [16] The ... Representation of the two four-Cys motifs of subunit EchF The mode of binding of the two putative [4Fe-4S] clusters is indicated The M barkeri strains carrying cysteine to serine mutations are indicated ... BamHI and PstI, resulting in pAMG77 Each of the seven point mutations generated from pAMG57 and the insert from the original pAMG57 were then subcloned into pAMG77 using the ApaI and XhoI restriction...
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Báo cáo Y học: The role of zinc in the methylation of the coenzyme M thiol group in methanol:coenzyme M methyltransferase from Methanosarcina barkeri New insights from X-ray absorption spectroscopy doc
... ligand in all zinc-containing MtaA proteins [i.e 2.0 (N/O) plus (S)] We interpret these results as indicating the binding of the thiol sulfur of HS-CoM to the zinc atom of MtaA in a way that it ... Ala, the pronounced changes in the EXAFS spectra resulting from HS-CoM addition are indicative of an increase in the number of sulfur ligands (visual inspection of Fig 1C) Thus, in both mutants the ... HS-CoM binding seems to involve ligation of the thiol group of HS-CoM to the active-site zinc For the Cys239 Ala mutant plus HS-CoM the simulation results suggest the presence of tetra-coordinated...
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Báo cáo Y học: Identification of mammalian-type transglutaminase in Physarum polycephalum Evidence from the cDNA sequence and involvement of GTP in the regulation of transamidating activity potx
... because of the attachment of the hexahistidine, the recombinant PpTGase protein appeared to be slightly larger These results indicate that the cDNA obtained covered the entire coding region Involvement ... amino-acid replacement per site terminus that is required for binding to the plasma membrane, thereby being involved in the formation of the corneum [47] Additional amino-terminal residues of ... indicates the stop codon Three amino acid residues of the catalytic triad are boxed The single and double lines indicate the putative Ca2+- and GTP-binding sites, respectively That sequence included...
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Accuracy of Clinical Signs in the Diagnosis of Pulmonary Tuberculosis: Comparison of Three Reference Standards Using Data from a Tertiary Care Centre in Rwanda doc
... care level and by the frequent coinfection HIV-TB Together with the high HIV prevalence, the tertiary care level probably explains also the frequency of microscopy negative cases (false negative ... the amount of the relationship between the variables that remains unexplained by a model; the larger the value, the poorer the model fits the data As a rule of thumb, a good fit is provided by ... selection of patients at reference level), our findings are not dissimilar from those of other authors A good sensitivity of fever and HIV infection, and a high specificity of haemoptysis and cavities...
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Báo cáo khoa học: The starch-binding capacity of the noncatalytic SBD2 region and the interaction between the N- and C-terminal domains are involved in the modulation of the activity of starch synthase III fromArabidopsis thaliana pdf
... the synthesis of amylopectin, it has been suggested that SSI is mainly involved in the synthesis of small chains of this fraction Furthermore, SSIV has been found recently to be involved in the ... interaction between the N- and C-terminal domains of SSIII in vitro Mapping of the CD-binding region in the N-terminal SBDs In order to identify the SBD region required for the SBD–CD interaction, we ... D(495–535) in the D3 domain This result is in agreement with our previous studies using truncated SSIII isoforms, showing the importance of the D23 domain in starch binding and the modulation of SSIII...
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Báo cáo khoa học: An intermediate step in the evolution of ATPases ) the F1F0-ATPase from Acetobacterium woodii contains F-type and V-type rotor subunits and is capable of ATP synthesis Michael Fritz and Volker Muller ¨ docx
... V1 V0ATPases has only half the number of ion-binding sites This is seen as the reason for the apparent inability of V1 V0-ATPases to catalyze ATP synthesis in vivo Indeed, V1 V0-ATPases have evolved ... giving rise to a 16 kDa protein with two hairpins [20] Most important, the ion-binding site is not conserved in hairpin If one assumes the same number of hairpins in V0 and F0, the rotor of V1 V0ATPases ... addition of lm valinomycin, a membrane potential (DY, inside positive) was created in addition by the in ux of K+ into the liposomes (potassium ion diffusion potential) and in the presence of both DY...
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