influence of peter villaume

... temperature of 400 °C) An automatic syringe pump was used to deliver mL of a solution containing 10 mM of Fe(acac)3 (99.9+%, Aldrich) in ethanol to the spray head every 30 s at a liquid feed rate of 12 ... wavelength of the incident light This is consistent with our expectations for the following reasons First, the rate of charge carrier recombination via surface states is independent of the wavelength of ... associated with the excitation of an e-h pair However, the absorbance spectrum of the Fe2O3 provides a qualitative first approximation of the frequency response of the semiconductor and can capture...

Ngày tải lên: 18/09/2013, 21:26

... as the ratio of global mean burden to global mean emission) is influenced by changes of the source distribution as well as changes in the aerosol and oxidant composition The influence of changes ... significantly in terms of their mix of aerosol and aerosol precursor emissions and thus in terms of their microphysical properties We tested this for the extreme case of a maximum abatement of either SO2 ... Twomey, S.: The influence of pollution on the shortwave albedo of clouds, J Atmos Sci., 34, 1249–1152, 1977 5565 Unger, N., Shindell, D., Koch, D., and Streets, D.: Cross influence of ozone and sulfate...

Ngày tải lên: 17/02/2014, 10:20

... cutoff distance (rc ẳ 6.0 A) The dynamics of the resulting network are then dened by the Ni ã Nj Kirchhoff connectivity matrix of interresidue contacts (G) where the off diagonal elements of ... electrostatic potentials (EP) for the Ne of the lysine residues of a-CT at pH EP, EwaldEi EP is the Ewald energy of placing a charge of +1 at the location of the ith ionizable atom [89] Reactivity ... [17,18] While all of these experimental works suggest the possible involvement of structural dynamics in the various kinetic steps of a-CT catalysis, no actual measurements of protein structural...

Ngày tải lên: 19/02/2014, 05:20

... temperature plot of the b-sheet band of b2m at 1592 cm)1 or from the frequency ⁄ temperature changes of the tyrosine ring vibration of the HC at 1514 cm)1 of the IR spectra of B*2705 ⁄ 13C-b2m:pVIPR–U5, ... identical peak positions of the bsheet band of 13C-labelled b2m in the two samples In turn, these characteristics suggest a very similar degree of H ⁄ D exchange of the amide protons of b2m in B*2705 ... are due to different packing of the protein chains in crystallo A comparison of the X-ray structures revealed, however, that the structures of the HC and of b2m of the two subtypes appear nearly...

Ngày tải lên: 06/03/2014, 00:21

... terms of low background levels of reporter gene activity in the absence of a ligand and high levels of reporter gene activity in the presence of a ligand [23] However, the ligand sensitivity of ... after addition of ligand (Fig 11A) The turn off of reporter activity after withdrawal of ligand is also fast More than 50% of reporter activity was reduced by 12 h after withdrawal of ligand and ... in the place of USP in all EcR gene switches developed to date One of the major limitations of current versions of EcR gene switches is the requirement of micromolar concentrations of ligand for...

Ngày tải lên: 07/03/2014, 12:20

... the presence of the equivalent amount of BSA in the according buffer a distinct band of transcription product was also present as a small amount of undigested plasmid The addition of CSP resulted ... in buffer B Fig Inuence of CSPs on the in vitro translation of CAT Activity level of CAT after in vitro translation of mRNA transcribed from pET14bCAT in the presence of mgặmL)1 BSA (control), ... inhibition of FEBS Journal 272 (2005) 46914702 ê 2005 FEBS Inuence of CSPs on transcription and translation Fig Suppression of the CSP inhibition of CAT-expression by ssDNA Titration of poly dT7...

Ngày tải lên: 07/03/2014, 21:20

... leaflet of mammal cell membranes, POPG 20 mol% in POPC ⁄ POPG LUV mimics the environment of the inner leaflet of mammal biomembranes and it offers an opportunity to study the influence of electrostatic ... membrane interaction behaviour of MPRP-C and MPRP-I is independent of the membrane phase but not of the presence of charged lipids Cholesterol does not reduce the extent of or potentiate membrane ... interactions of peptides can be enhanced by a concerted action of several membrane-binding motifs or by the particular disposition of key residues in the context of long peptides or even in the context of...

Ngày tải lên: 23/03/2014, 07:20

... consist of artworks, it is worthwhile to study the effect of paintings by artists of high art Leder et al (2004) considered this to be of particular importance, because a preclassification of an ... mean ratings of the scale Understanding (error bars indicate standard errors of the mean) 3.2.3 Influence of interest in art on aesthetic experience In order to analyze the effect of interest in ... hedonic value of paintings British Journal of Psychology, 94(1), 99–110 Russell, P A., & Milne, S (1997) Meaningfulness and hedonic value of paintings: effects of titles Empirical Studies of the Arts,...

Ngày tải lên: 23/03/2014, 13:20

... the inactivation courses of apo-TNXI and of TNXI in the presence of mm concentrations of each of the three divalent cations (Mg2+, Mn2+, or Co2+) With the exception of apo-TNXI, whose inactivation ... studies of the mechanism of xylose isomerase Biochemistry 28, 7289–7297 Bradford MM (1976) A rapid and sensitive method for quantitation of microgram quantities of protein utilizing the principle of ... biophysical properties of some XIs have been studied in the presence of two different metals (e.g Mg2+ and Co2+) [43–45] For three of the enzymes studied here, the Tm in the presence of mm Mg2+ plus...

Ngày tải lên: 23/03/2014, 13:20

... studies of growth kinetics for any full characterization of the effects of a mutation on growth in the presence of a stress agent (Fig 8) Importantly, this and other studies [18] strike a note of ... Defects in several of the enzymes of aromatic amino acid biosynthesis therefore hypersensitize yeast to weak organic acid stress We also investigated the growth of this same series of strains after ... backgrounds This investigation into the influences of aromatic amino acid auxotrophy on weak acid resistance was initiated in response to the finding that losses of Pdr12p or of Azr1p appeared to be exerting...

Ngày tải lên: 23/03/2014, 21:20

... presence of low concentrations of cytochrome c plus TMPD and ascorbate As the concentration of cytochrome c is increased, the fraction of cytochrome a that is reduced increases The fraction of cytochrome ...  90% inhibition of the overall activity of the cytochrome c oxidase, an energetic difference of  1.2 kcalÆmol)1 Part of the inhibition probably stems from a slight weakening of the interaction ... reductive phase of the catalytic cycle This idea is in keeping with the results of other studies [12,27–32] In terms of the comparisons made in this work, it is only with the start of a second cycle...

Ngày tải lên: 31/03/2014, 07:20

... evaluation of the influence of jitter (as well of other levels of noise and their combinations) in the performance of the PDA and HNRSr would require extensive tests and is out of the scope of this ... spite of using estimated values for the pulse amplitudes Both facts can be explained by the presence, in any pulse of the signal, of the decaying tails of previous pulses This summation of tails ... implementation of (28) was performed by setting a sampling frequency of 22050 Hz, a fundamental frequency of 150 Hz (yielding 147 samples per period), and M = 300, to produce an approximate of seconds of...

Ngày tải lên: 21/06/2014, 20:20

... interval of 1/8 has been selected for all tests [6, 13] Results 3.1 Influence of MPE-FEC Coding Rate on R, RCINR|5 , and RE|5 In this section, the influence of the MPE-FEC rate on the range of the ... are the result of one single investigated route 3.2 Influence of Modulation Scheme on R, RCINR|5 , and RE|5 In this section, the influence of the modulation scheme on the range of the DVB-H network ... calculation, because the influence of the height difference on the range is negligible compared to the influence of the x, ycoordinates CINRR and ER are the average values of CINR and E, respectively,...

Ngày tải lên: 21/06/2014, 22:20

... coupling However, the plot of v-1 versus T (with cobalt concentration of 0.18 M) in the inset of Fig 7b does not passes through the origin Extrapolation of the linear part of this curve gives an ... 300 K for the undoped sample Temperature dependence of magnetization of nanoparticles with cobalt concentrations of 0.05 and 0.18 M in a field of 500 Oe are shown in Fig 7a and b, respectively It ... distortion of the tetrahedral coordination of Co2? ions and direct band gap absorption, while high cobalt concentration samples ([0.05 M) have more distortion of the tetrahedral coordination of Co2?...

Ngày tải lên: 22/06/2014, 00:20

... coefficient d33 of ground state superlattice is 86.36 pC/N, which is slightly less than the value of 103.18 pC/N of PTO, but much larger than the value of 36.43 pC/N of BTO Under the loading of uniaxial ... reflect the slope of polarization versus stress curves The enhancement of piezoelectricity corresponds to the maximum slope of the curve of Fig 4a at rc, it is the change of magnitude of polarization ... lattice constants of the unstrained superlattice structure We have examined the accuracy of our calculations by studying the influence of different strains on the properties of BTO and PTO, respectively...

Ngày tải lên: 22/06/2014, 00:20

... reactor which consists of four mass flow controllers (MFC’s) and a horizontal quartz tube furnace, capable of reaching a maximum temperature of 1100 °C Initially, approximately 0.2 g of fine Sn powder ... with 0.5 nm of Au and had an area of &6 mm2 The morphology of the SnO2 NWs was examined with a TESCAN scanning electron microscope (SEM) while the crystal structure and the phase purity of the NWs ... the source of short pulses Approximately mJ of amplified energy was used to pump an Optical Parametric Amplifier (OPA) providing ultrafast pulses in the UV range of the spectrum The rest of the energy...

Ngày tải lên: 22/06/2014, 00:20

... basic sites but also by acidic sites of the oxide catalysts Thus, it may be suggested that the control of surfaces and modifications of the nanostructures of the tin oxide particles, undoped and ... agrees with the shape of the Ce XPS pattern suggesting a nonhomogenous covering of CeO2 on the surface of the Ce-SnO2 particles, in contrast to the homogenous covering of rare earth stanate observed ... Conversion/Selectivity (%) ð1Þ The effects of the process of segregation and de-mixing of these rare earths on the SnO2 catalytic properties were studied and compared In spite of the relatively low specific...

Ngày tải lên: 22/06/2014, 01:20

... only wt% of MWCNT in case of former and with wt% in case of the latter Electrical Properties Fig SEM images of a raw, b acid modified-MWCNTs and c amide-MWCNTs As in the case of TS, the YM of the ... Structure of PMDA/ ODA-based polyamic acid 123 446 Amine Modification of Acid Modified A 100 mL-flask was charged with g of MWCNTs-COOH dispersed in 30 mL of anhydrous benzene (C6H6) to which 30 mL of ... readings of voltage drops at different portions of the sample Result and Discussion FTIR Studies Characterization Fourier Transform Infrared Spectroscopy Functionalization of MWCNTs and conversion of...

Ngày tải lên: 22/06/2014, 01:20

... amount (phr) of prevulcanized SBR gel added into the NR latex Characterization of Gelled Latex Samples and Measurements of Various Properties of Gel Filled Rubbers Gel fraction of the prevulcanized ... amount of sulfur in the system Increase in T.S and reduction in EB values are related to the introduction of greater number of crosslinks initiated by the sulfide linkages In the case of NS series of ... that of TS However, SBR gels have comparatively higher values of Ey than the NR gels The dynamic mechanical properties of different gels as compared to that of neat rubber strongly reflect the influence...

Ngày tải lên: 22/06/2014, 01:20

... and a redshift (left plot of Fig 1) of the whole spectrum occurs due to the sample heating This suggests a random capture of exciton in such nanostructures in spite of a stepwise relaxation with ... the existence of a continuum of states in the spectral range of the QD transition energies in our samples Conclusion In conclusion, we have measured the rise and decay dynamics of the ground ... dependence of the N = and N = intensities Fig Time resolved experiments for the ground state (N = 1) as a function of the temperature The right plot displays the temperature dependence of the measured...

Ngày tải lên: 22/06/2014, 18:20