stability of γ umo nuclear fuel alloys by thermal analysis

... DOE, the Office of Nuclear Energy’s Office of Fuel Cycle Technology has initiated a planning project with the objective of pursuing activities that can be conducted within the constraints of the ... of Used Nuclear Fuel and High-Level Radioactive Waste Figure Possible system pathways This system would initially be focused on acceptance of used nuclear fuel from shut-down reactors; such fuel ... consideration of the viability of economic recovery of nuclear materials, research and development (R&D) needs, time frames in which recycling might be deployed, the wide diversity of types of used nuclear...

Ngày tải lên: 21/02/2014, 21:20

... washers, each having a number of grooves and plateaus, shall be used The crevice design shown in Fig is one of a number of variations of the The sole source of supply of the apparatus known to the ... estimated by the following Eq.1 of 10.1.3 Testing shall begin at the nearest increment of 5°C, estimated by the above equation The minimum temperature of test is 0°C and the maximum temperature of test ... comparing the resistance of stainless steels and related alloys to the initiation of pitting and crevice corrosion The results may be used for ranking alloys in order of increasing resistance...

Ngày tải lên: 13/01/2016, 17:51

... to a different interpretation of the role of Arg234 and Arg242 for oxyanion-dependent stability of StP The stabilization brought about by the presence of 10 mM of phosphate was substantially ... observed kinetic stability of R242A mutant of StP, compared to wild-type enzyme It also provides a rational for an allosteric mechanism of stabilization of StP by oxyanion binding In light of the fact ... mutants Stability of recombinant wild-type StP and TOWER helix mutants thereof as revealed in urea and thermal denaturation experiments To compare the stabilities of StP and Arg fi Ala mutants thereof,...

Ngày tải lên: 31/03/2014, 01:20

... three isoforms of IL-1Ra protein, which possess inhibitory activity against IL-1, are synthesized by alternative splicing of a single gene, we produced mice deficient in all three isoforms of IL1Ra ... controls The severity of arthritis was graded for each paw on a scale of to for the degree of redness and swelling: grade = normal; grade = light swelling of the joint and/or redness of the footpad; ... signals were collected by laser scan, and the results were analyzed with GENECHIP ANALYSIS software (Affymetrix) Statistical analysis and data management Data were normalized by the average fluorescent...

Ngày tải lên: 09/08/2014, 08:22

... mutation of Thr15 to Ala in the vicinity of the hydrophobic core induces a tighter binding of the cofactor in C freundii TPL, thereby reducing the decomposition rate of the cofactor by a Pictet–Spengler ... increase the thermal stability of the enzyme by °C, with a slight compromise in enzyme activity [21] Meanwhile, the four hits AS4–AS7 that exhibited a co-improvement of activity and stability included ... rigidity of domain structures enhances the stability of a mutant enzyme created by directed evolution Biochemistry 42, 14469– 14475 Song JK & Rhee JS (2000) Simultaneous enhancement of thermostability...

Ngày tải lên: 07/03/2014, 00:20

... role in the thermal stability of the enzyme The present work represents the first experimental Engineering thermal stability of L-asparaginase approach for improving the thermal stability of this ... unusual electrostatic potential The basis of thermal stability of the Asp133Val mutant The thermal stability of the purified Asp133Val mutant enzyme was assessed by measuring its residual activity after ... characterization of a thermostable mutant One of the most important goals of protein engineering is to produce modified enzymes with improved thermostability However, the thermal stability of a protein...

Ngày tải lên: 30/03/2014, 02:20

... self-humidifying effects of passive fuel cells are balanced by the transfer of heat and water to the ambient Optimal performance of air-breathing cells is therefore a complex function of ambient and load ... durability of proton exchange membranes used in fuel cells is a major factor in the operating lifetime of fuel cell systems The stresses distribution in the air-breathing fuel cells is affected by ambient ... temperature of an unconstrained isotropic volume are given by; π T = ℘(T − TRe f ) (31) where ℘ is thermal expansion (1/K) Similarly, the swelling strains caused by moisture uptake are given by; π...

Ngày tải lên: 05/09/2013, 14:58

... native-state stability (A) Native-state stability, as measured by the mid-point temperature of unfolding (Tm) of each lysozyme variant (including WT protein), was plotted against the secretion level of ... similar extent Of particular interest from the point of view of amyloid disease is the characterization of the two new mutational variants associated with clinical disease Analysis of both the F57I ... corresponds, within the bounds of experimental error, to the Tm determined by CD analysis at pH 5.0 (Table 1) Because of the low protein concentrations of F57I and W64R, measurement of the ANS fluorescence...

Ngày tải lên: 19/02/2014, 08:20

... the changes in the thermal unfolding of actin induced by interaction of G-actin with actin-binding proteins [25– 27], G–F transformation of actin, and stabilization of F-actin by phalloidin and ... error of the given values of Tm did not exceed ±0.2 °C The relative error of the given values of DHcal did not exceed ±10% G-actin Results Effects of the D-loop cleavage on the thermal unfolding of ... maximum thermal transition temperature (Tm), by 1–2 °C, with no effect on the DHcal value (Table 1) By contrast, the replacement of bound ATP by ADP caused a dramatic decrease in the thermal stability...

Ngày tải lên: 06/03/2014, 22:21

... spectrophotometric cuvettes for analysis Thermal lens spectrometric analysis of bilirubin The thermal lens spectrometric analysis was performed in batch mode on a dual-beam, mode-mismatched thermal lens spectrometer ... consisting of FEBS Journal 272 (2005) 5522–5535 ª 2005 FEBS S Passamonti et al Fig Calibration curve of bilirubin analysed by thermal lens spectrometry A series of bilirubin solutions was prepared by ... yielded by both bilirubin and nicotinic acid at nanomolar concentrations Kinetic analysis of these effects has enabled the calculation of the dissociation constants of the complexes of bilitranslocase...

Ngày tải lên: 07/03/2014, 21:20

... occasion of 50th Anniversary of Department of Mathematics, Mechanics and Informatics, Vietnam National University References [1] Tran Kim Thanh, On the characterization of the distribution of the ... independent of ε Indeed, by using Essen’s inequality (see [3]) we have 1 ρ(Ψ; Ψ1 ) C5 ε + C6 ε K1 ε T where K1 is a constant independent of ε (26) C4 ε (27) Nguyen Huu Bao / VNU Journal of Science, ... composed variables and the estimate of the stable degree of the Renyi’s characteristic theorem, Acta Mathemaica Vietnamica 21 (1996) 269 [3] C G Essen, Fourier analysis of distribution functions, Acta...

Ngày tải lên: 14/03/2014, 13:20

... Accumulation of nCLU correlated with inhibition of cell proliferation and induction of apoptosis of human tumor epithelial cells caused by cell detachment and anoikis [63], chemotherapy [50,64–66] and tumor ... mechanisms of the anticancer effects of vanadium compounds were due to both inhibition of cellular proliferation and induction of apoptosis [1,2] Vanadium compounds inhibited the growth of several tumor ... cytokines, tumor promoters, and chemical carcinogens [13,14] In addition, the activity of AP-1 is modulated by the redox state of the cells [15] In turn, AP-1 regulates a wide range of cellular...

Ngày tải lên: 16/03/2014, 02:20

... Intensity of cytoplasm Ratio of Translocation = Intensity of nucleus Intensity of cytoplasm Intensity of nucleus Scheme This is a simplication of a cell as seen by analysis software, where the software ... method of analysis (in vitro, cell-based and in silico analysis) will facilitate systematic understanding of the underlying properties of this signaling pathway To summarize Activation of cells ... cell-based measurements of time-varying phenomena, in this case, oscillatory variations of nuclear levels of NF-jB In order to attain this degree of precision, optimization of experimental conditions...

Ngày tải lên: 16/03/2014, 11:20

... precipitation of silicon nanowires from the droplet can be induced Based on a systematic analysis of the growth mechanism of semi-conductor nanowires, Lee et al [18] proposed an oxide-assisted model by ... made of a Si core and a SiO2 sheath The one-dimensional growth of SiNWs is facilitated by the SiO2 sheath that con®nes the lateral growth of SiNWs, and the high absorptivity for Si±O clusters of ... sub-branches of SiNWs are all terminated by Si bulbs, making them di€erent from those SiNWs reported before [5,6] The average diameter of the main branch of SiNWs is in the range 40±60 nm, and that of...

Ngày tải lên: 16/03/2014, 15:06

... appears to be a superposition of the spectra of elemental silicon and of SiO2 [14] The onset of the near-edge structure of the nanowire is located at a lower energy than that of SiO2 The shoulder peak ... nanowires grown after rapid thermal annealing at 900 °C for 60 s X-ray (EDS) analysis shows that the wire is mainly composed of Si and O, whereas the seed particle is constituted by Pt and Si, as shown ... ELNES of the nanowire and Si substrate, respectively The Si L23 ELNES of the nanowire shows a higher energy than that of the Si substrate Schulmeister and Mader reported that the Si L23 ELNES of...

Ngày tải lên: 16/03/2014, 15:09

... agglomerated clusters consisting of high density of nanowires The magnified view of a single cluster is depicted in the inset of Fig 2(d) These observations suggest that growth of nanowires in the present ... diffusion of Si/SiOx vapors into the metal particles, (ii) formation of liquid droplet of metal and Si/SiOx and (iii) the precipitation in the form of solid nanowires after super-saturation of liquid ... dioxide nanowires of several hundred microns in length and tens of nanometers in diameter have been synthesized in bulk by a non-catalytic single step process using thermal evaporation of silicon monoxide...

Ngày tải lên: 16/03/2014, 15:18

... were crystallized well The top view of the SiNWs on the di erent substrates observed by SEM is shown in Fig The plenty of the SiNWs with the length of tens of micrometers were observed The corresponding ... SiO2 and -Al2 O3 came from the decomposition of SiO and the Al2 O3 substrate, respectively Fig TEM images of the SiNWs produced by thermal evaporation of SiO on a silicon wafer (I, the upper right ... which is caused by the diameter decrease of the SiNWs [21] Conclusion A large-scale crystalline SiNWs on silicon wafers and Al2 O3 templates were fabricated by the thermal evaporation of silicon monoxide...

Ngày tải lên: 16/03/2014, 15:21

... diameter of B20 nm were successfully synthesized on silicon wafers by thermal evaporation of sulfur powders It is considered that the decomposition of SiS resulted in the formation of SiNWs Furthermore, ... from one of the SiNWs On top left is the magnified TEM image of a SiNW with tip did not crystallize well This might be due to the fast growth rate of the SiNWs The thorough analysis of crystal ... p-type (1 1) silicon wafers with a resistivity of about 0.001 O cm by means of a low-vacuum CVD system First, several pieces of silicon wafers and plenty of sulfur powders were placed in a semi-sealed...

Ngày tải lên: 16/03/2014, 15:21

... image of SiC nanowires synthesized using the AAO template by thermal evaporation It reveals that large quantities of randomly distributed wire-like products have been obtained The nanowires are of ... nanowires (Fig 5b) The presence of peaks demonstrates that the nanowires are composed of Si, C and small amount of O It is found that the molecular ratio of Si/C/O of the nanowires is about 3:2:2, ... synthesized using AAO template by direct thermal evaporation without any metal catalyst at high temperature The as-synthesized products mainly consist of b-SiC nanowires By means of XRD, SEM, EDS, IR and...

Ngày tải lên: 16/03/2014, 15:21

... temperature range from 890 to 1320 °C by thermal evaporation of SiO powders at 1350 °C for h under 300 Torr of a flowing gas mixture of 5% H2-Ar at a flow rate of 50 sccm Silicon-based nanostructures ... the length of the Si core is only one-third to one-half of the entire length of the wire, and the rest of the wire is pure amorphous silicon oxide We also investigated the cross section of the hard ... I A high density of defects, such as stacking faults and microtwins, were usually observed in the crystalline Si core of the wire The other kind of wires consists of chains of Si nanoparticles...

Ngày tải lên: 16/03/2014, 15:30