influence of polymer additive

Ngày tải lên: 05/07/2014, 21:20

Ngày tải lên: 18/09/2013, 21:26

... 5567 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 ... 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 ... mode, is a result of the interdependence of sulfate and carbonaceous emission to form aerosols of the accumulation size mode range. Gas- phase SO 4 condensates on the surface of primary emitted...

Ngày tải lên: 17/02/2014, 10:20

... catalytic mechanism of the enzyme. Structural insights into the mechanochemical nature of a-CT catalysis A more detailed analysis of the influence of chemical glycosylation on the dynamics of a-CT from ... within a cutoff distance (r c ¼ 6.0 A ˚ ). The dynamics of the resulting network are then defined by the Ni · Nj Kir- chhoff connectivity matrix of interresidue contacts (G) where the off diagonal ... pot- entials (EP) for the N e of the lysine residues of a-CT at pH 9. EP, EwaldEi. EP is the Ewald energy of placing a charge of +1 at the location of the i th ionizable atom [89]. Reactivity order...

Ngày tải lên: 19/02/2014, 05:20

... 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 b 2 m of the two subtypes appear nearly ... conformational flexibility of the B*2705 HC in comparison to that of B*2709 found also in case of pVIPR-U5 (see IR results, Fig. 2) must be regarded as an intrinsic property of the HC of the two subtypes ... study the effect of lowering the pH such that it approached that in an inflamed tissue [12]. To this end, we analysed the influence of a pH value of 5.6 on the thermal stability of all four HLA-B27:peptide complexes...

Ngày tải lên: 06/03/2014, 00:21

... 1 h after addition of ligand and reached peak levels of 19 000-fold induction by 48 h after addition of ligand (Fig. 11A). The turn off of reporter activity after withdrawal of ligand is also ... the place of USP in all EcR gene switches developed to date. One of the major limitations of cur- rent versions of EcR gene switches is the requirement of micromolar concentrations of ligand ... 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...

Ngày tải lên: 07/03/2014, 12:20

... efficiency of various genes under the control of a strong promotor is influenced by many Fig. 5. Influence of CSPs on the in vitro translation of CAT. Activity level of CAT after in vitro translation of ... inherent experimental errors of our assay. However, the expres- sion of CAT under the influence of any of the three used CSPs resulted in a significant, dramatic decrease of protein synthesis rate ... cases. Therefore we can confirm the hypothesis of [6] that high concen- trations of CSPs lead to an inhibition of general R. Hofweber et al. Influence of CSPs on transcription and translation FEBS...

Ngày tải lên: 07/03/2014, 21:20

... 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 interaction. ... membrane interactions of peptides can be enhanced by a concerted action of several membrane-binding motifs or by the particular dispo- sition of key residues in the context of long peptides or even ... analysis of partition into membranes of mem- brane proximal region sequence. (A) Values of DG wif < 0 indicate the sequence residues with tendency to the membrane–water interface. (B) Values of...

Ngày tải lên: 23/03/2014, 07:20

... 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 ... 193 Entitling art: Influence of title information on understanding and appreciation of paintings Helmut Leder a,b, * , Claus-Christian Carbon a , Ai-Leen Ripsas b a Faculty of Psychology, University of Vienna, ... 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...

Ngày tải lên: 23/03/2014, 13:20

... the inactivation courses of apo-TNXI and of TNXI in the presence of 5 mm concentrations of each of the three divalent cations (Mg 2+ ,Mn 2+ ,or Co 2+ ). With the exception of apo-TNXI, whose inacti- vation ... inactivation in the presence of 5 mm metal at 99–100 °C was slowest in the presence of Mn 2+ [half-life (t 1 ⁄ 2 ) of 84 min], compared to Co 2+ (t 1 ⁄ 2 of 14 min) and Mg 2+ (t 1 ⁄ 2 of 2 min). While adding ... optimal temperatures of activity often in excess of 100 °C [1]. Studies focus- ing on the molecular basis for the thermostability of these enzymes have revealed an array of subtle contri- buting...

Ngày tải lên: 23/03/2014, 13:20

... College London, UK The ability of yeasts to grow in the presence of weak organic acid preservatives is an important cause of food spoilage. Many of the determinants of acetate resistance in Sac- charomyces ... intracellular levels of benzoate and fluorescein by catalysing an active efflux of these compounds from the cell [2,4]. The inhibitory effects of different organic acids on cells of the Dpdr12 mutant ... short chain (C 3)8 ) carboxylic acids of reasonable water solubility [5,6]. A similar spectum of acids is also capable of mediating the War1p-dependent induction of Pdr12p [3,6]. These are acids that...

Ngày tải lên: 23/03/2014, 21:20

... presence of low concentrations of cytochrome c plus TMPD and ascorbate. As the concen- tration 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 ... the consumption of protons in the mitochondrion, results in the formation and maintenance of a transmembrane gradient of protons. It, in conjunction with the membrane potential, powers the synthesis of ATP...

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)wasperformedby 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 2 seconds of synthesized...

Ngày tải lên: 21/06/2014, 20:20

... interval of 1/8 has been selected for all tests [6, 13]. 3. Results 3.1. Influence of MPE-FEC Coding Rate on R, R CINR| 5 ,and R E| 5 . In this section, the influence of the MPE-FEC rate on the range of ... are the result of one single investigated route. 3.2. Influence of Modulation Scheme on R, R CINR| 5 ,andR E| 5 . In this section, the influence of the modulation scheme on the range of the DVB-H ... strength. MFER is the ratio of the number of residual erroneous frames (i.e., not recoverable) and the number of received frames [3]. FER is the ratio of the number of erroneous frames before...

Ngày tải lên: 21/06/2014, 22:20

... coupling. How- ever, 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 ... distortion of the tetrahedral coordination of Co 2? ions and direct band gap absorption, while high cobalt concentration samples ([0.05 M) have more distortion of the tetrahedral coordi- nation of Co 2? and ... for generation of diluted magnetic semiconductors (DMS) [3, 12]. DMS can play a vital role in the field of spintronics because of its ability to accommodate electron charge and its spin degrees of freedom...

Ngày tải lên: 22/06/2014, 00:20

... piezoelectric coefficient d 33 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 ... the slope of polarization versus stress curves. The enhancement of piezoelectricity corresponds to the maxi- mum slope of the curve of Fig. 4aatr c , it is the change of magnitude of polarization ... lattice constants of the unstrained superlattice structure. We have examined the accuracy of our calcula- tions by studying the influence of different strains on the properties of BTO and PTO, respectively...

Ngày tải lên: 22/06/2014, 00:20

... nm of Au and had an area of &6 9 6mm 2 . The morphology of the SnO 2 NWs was examined with a TESCAN scanning electron microscope (SEM) while the crystal structure and the phase purity of the ... source of short pulses. Approximately 1 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 ... an average diameter of 50 nm and lengths C5 lms. Further- more the diameter of the SnO 2 NWs was found to be uniform along their length. The growth of the SnO 2 NWs occurs via the formation of Au nanoparticles...

Ngày tải lên: 22/06/2014, 00:20

Ngày tải lên: 22/06/2014, 01:20

Ngày tải lên: 22/06/2014, 01:20

Ngày tải lên: 22/06/2014, 01:20