an original route for the synthesis of novel materials

... appear to be important for either the synthesis of novel materials, the preparation of nanostructured particles for nanotechnologies or the elaboration of bio-inspired materials for applications ... domains: ? the synthesis of novel materials (design of materials with specific structures and properties), ? the processing of functional materials (an emerging route in synthesis chemistry), ? the crystal ... to the development of solvothermal reactions in Materials Chemistry a specific attention will be given to the synthesis of novel materials and the development of new processes Solvothermal synthesis...

Ngày tải lên: 20/03/2014, 13:08

... dimensions These nanoparticles necessarily have a size smaller than the pores of the AAO mask and will be responsible for the constant dimensions of the synthesized nanowires Figure shows the surface ... structure of the membrane and before the treatment conditions allow the nanowires growth As can be seen there, the catalyst can be observed as small particles inside the porous structure of the mask ... produced by van der Waals forces and it can be substantially improved by wetting the AAO membrane in propan-2-ol/ethanol (2:1, v/v) mixture After that, the template supported on the Si (100)...

Ngày tải lên: 21/06/2014, 01:20

... solvents and organics in the structural evaluation of NiO nanostructures The EDX measurement indicates that nanoparticles are composed of Ni and O, and the analysis in the NiO nanoparticles/nanoflowers ... extended and expanded to provide a general simple and convenient strategy for the synthesis of nanostructures of other functional materials with important scientific and technological applications The ... using organics and templates which may be scaled up for industrial applications The methodology may provide a one-step, fast, non-toxic, and mass production route for the synthesis of other functional...

Ngày tải lên: 22/06/2014, 01:20

... assay, the enzyme reaction product identified by GC-MS analysis, and the determination of released ammonia The coupled enzyme assay revealed the mechanism of the deamination reaction and the subsequent ... spectrophotometer and spectra were recorded every (C) Enlargement of the original plots shown in (B) present in cell extracts of succinate/glucose-grown cells; therefore, the synthesis of the enzyme ... deaminases [6,8,27] or to any other sequences available in FASTA and BLAST database programs at the DNA Data Bank of Japan Recently, we reported the cloning and sequencing of the gene encoding 4-amino-3-hydroxybenzoate...

Ngày tải lên: 19/02/2014, 16:20

... thickness was 15–20 nm The barrier layer (junction between the nanotubes and the metal surface) appeared in the form of domes connected with one another (Fig 2) No further changes in nanotubular morphology ... irradiation (a–d) and (e) cross-sectional view of (c) showing the compact nanotubes and the barrier layer The above experiments show that using ultrasonic waves for anodization can reduce the synthesis ... spectra of the as-anodized and annealed titania nanotubes are shown in Fig 10 It can be seen that the titania nanotubes annealed under N2 atmosphere give better absorption in a visible region (band...

Ngày tải lên: 05/05/2014, 15:26

... shaker and were shaken for about synthesized size nanoparticles are less than 12 h Then, by micropipet extracted 10 μL 100 nm That means the synthesized catalysts of solutions and injected to GC and ... towards the toxicants makes them the potential the reduction rate of metal ions and the materials for the decomposition applications agglomeration process of metal atoms It was These intriguing ... final temperature of the oven was programmed isopropanol or heptane as solvent and 10 μL to 60 °C (held for min) and 220 °C, to reach the of toluene as internal standard and 5, 50, 100 M Sadeghi...

Ngày tải lên: 06/05/2014, 08:55

... Attempts to Refine Synthetic Route 183 iii SUMMARY PART I: Development of Novel Methods for the Synthesis of Homoallylic Alcohols In the development of novel methods for the synthesis of homoallylic ... the stereocenter and olefin geometry together with the isolation of the branched-adduct homoallylic alcohols in one isomeric form have warranted the proposed mechanism PART II: Multigram Synthesis ... yield) and afforded 62% yield of the Prins 32 Enantioselective Crotyl Transfer product Nonetheless, dichloromethane became the solvent of choice for the crotyl transfer reaction when it gave the...

Ngày tải lên: 16/09/2015, 17:11

... dehydrogenase [12,20] Humans and some animals (including other primates and guinea pigs) are natural mutants for ascorbic acid synthesis because of the nonfunctional GLO gene for l-gulono-1,4-lactone ... protein and another vitamin C-related enzyme, the GDP-mannose-3¢,5¢epimerase [9] The presence of multiple GST-containing bands of about 30 kDa (Fig 1, lane 5) suggests that an important portion of the ... from the E coli host after long (3 h) (lanes and 3) and short (1 h) (lanes and 5) periods of induction with IPTG Fractions obtained with a long period of induction before (lane 2) and after (lane...

Ngày tải lên: 07/03/2014, 12:20

... GDP-4-keto-6-deoxy-D-mannose reductase and the stereoselectivity of the reduction determines the direction of synthesis of these two 6-deoxyhexoses However, neither the gene encoding the biosynthesis of ... 269) 5967 Fig The ESI/MS spectra for the authentic GDP-a-D-mannose (A) and the reaction product GDP-a-D-mannose, NADPH, and the gmd and tld gene products of A actinomycetemcomitans SUNYaB 75 ... cloned and characterized the gene clusters responsible for the biosynthesis of SPAs of A actinomycetemcomitans serotypes a, b, c, d, and e [23,29,34–36] The gene cluster associated with the synthesis...

Ngày tải lên: 17/03/2014, 10:20

... that can form different conformations by self assembly and lead to the formation of different nanostructures The presence of a rod-like micelle of the surfactant in solution promoted the formation ... surface The inset of Fig 2C shows a HRTEM image of the nanorods The lattice planes are clearly seen ˚ and the interplanar spacing 4.26 A correspond to the (1 0) planes, which reveal the crystalline ... in the form of rods We believe that because of the electrostatic interaction of the iron ions and the anionic surfactant SDS, rod-like conformational inorganic–surfactant composites may form,...

Ngày tải lên: 19/03/2014, 16:48

... sail; cannon; heathen, folk, people The words horse and foot, when they mean soldiery, retain the same form for plural meaning; as,— The foot are fourscore thousand ,The horse are thousands ten.—MACAULAY ... altogether an easy matter These things enhance the difficulty which an ordinary youth experiences in grasping and assimilating the facts of grammar, and create a distaste for the study It is therefore ... developed); "The forest's leaping panther shall yield his spotted hide" (i.e., the panther which the forest hides); "Whoso sheddeth man's blood" (blood that man possesses) How the possessive is formed...

Ngày tải lên: 22/03/2014, 16:22

... again in the same context, the SEL would contain the exception to the transcription rule, prohibiting the application of the stress rule The information from the SEL (and from the CEL at the clusterlevel) ... stored along with the entry and its result in the SEL These unextractable attributes rely on the context the entry appeared in rather than on the entry itself and, therefore, cannot be reconstructed ... on the basis of the feature values of the word or cluster under consideration The transcription rule "test "6 is evaluated and the proper branch is then selected on the basis of values of the...

Ngày tải lên: 24/03/2014, 05:21

... Jerry R Hobbs and Feng Pan 2004 An ontology of time for the semantic web ACM Transactions on Asian Language Information Processing, 3(1), March M Negri and L Marseglia 2005 Recognition and Normalization ... that the interpretation process is required to seek a value for; and by analogy, we use a lowercase t rather than an uppercase T as the date–time delimiter in the structure to indicate when the ... differ in their explicitness, i.e the extent to which the interpretation of the expression is explicitly encoded in the temporal expression; they also differ in their granularity, i.e the smallest...

Ngày tải lên: 31/03/2014, 01:20

... [45] On the one hand, the larger surface area (Table 1) in the ZnO (120 ºC, 17 h) sample can provide more active sites for the adsorption of KGL, and then facilitate the diffusion and mass transportation ... amount of oxygen vacancies can entrap electrons from the semiconductor, the holes can diffuse to the surface of the semiconductor and cause oxidation of the organic dye Therefore, a high density ... 2e) Therefore, it can be concluded that flower-like ZnO is produced after a hydrothermal treatment time of h, and further increasing the hydrothermal treatment time makes the diameters of the nanosheets...

Ngày tải lên: 06/05/2014, 13:26

... deals with larger quantity of materials, these factors are particularly very important therein Over the years, many reagents and catalysts have been developed for the synthesis of oximes Basic ... Ikegami T, Matano Y (1997) Bismuth in organic transformations Synthesis 3:249–267 22 Leonard NM, Wieland LC, Mohan RS (2002) Applications of bismuth(III) compounds in organic synthesis Tetrahedron ... used in the synthesis of oximes earlier In conclusion, the reported procedure is an interesting, extremely simple, suitable, fast, efficient, and novel method for the preparation of oximes The methodology...

Ngày tải lên: 20/06/2014, 22:20

... parameters and annealing condition The dependence of implantation energy for the formation and evolution of Ge-NCs in these stack structures were studied further Experimental details Before ion implantation, ... implantation in these stack structures FG, MC, JG, and CB prepared the samples for TEM observation and investigated the TEM results and done all the TEM analysis BSS investigated and performed ... charging, and -6 V for hole charging for 3s The constant-capacitance method at flat-band point was used for this measurement References Tiwari S, Rana F, Hartstein H, Crabbe EF, Chan K: A silicon nanocrystals...

Ngày tải lên: 21/06/2014, 05:20

... potential for the synthesis of optically pure βamino acids These pyridoxal 5’-dependent enzymes catalyze the transfer of an amino group from a donor substrate to an acceptor, thus enabling the synthesis ... chemical and enzymatic routes (and chemoenzymatic tandems) are applied and under intense investigation, there still is no gold standard for the preparation of enantiopure β-amino acids TAs can be ... Lys258 then acts as a catalyst for the 1,3-prototropic shift to form the ketimine The ketimine is hydrolyzed to yield the keto acid and PMP The following second half reaction consists of the formation...

Ngày tải lên: 21/06/2014, 17:20

... to the formula [14], the peaks at 147 and 169 cm-1 correspond to the SWCNTs with diameter of 1.59 and 1.38 nm, respectively The TEM image (Fig 3b) reveals that the product consists of single and ... studied The results suggest that when the temperature is lower than 750 °C, only a few SWCNTs are formed, and when the temperature is higher than 950 °C, more and more amorphous carbons are formed ... temperature When the temperature is higher than 900 °C, the ID/IG increases with growth temperature In the former stage, SWCNTs are formed gradually with increasing growth temperature and the content...

Ngày tải lên: 22/06/2014, 00:20

... observed Raman spectra for SWNTs show the presence of RBM, at 388.9 cm–1, in addition to the G- and Dbands The increase in the intensity of D-band for Nifilled MWNTs is due to the non-uniform filling ... which further enhance the catalytic reactivity and active sites for the formation of CNTs We have also analysed the outlet gas during methane decomposition at various temperatures and studied the ... carbon and the methane decomposition rate depend on the structure and nature of the active catalytic sites and the size of the catalyst particles [21], alloy hydride catalysts with low cost and...

Ngày tải lên: 22/06/2014, 22:20

... and using the symmetry of the integrand For an integer n ≥ and real numbers a, b and x, let b n I(n, x, a, b) := a =2 sin t xtn3/2 cos sin t dt and π (where all discontinuities of the integrand ... ln n and m is a fixed integer at least 2 Here, H2q are the Hermite polynomials defined before Theorem and the S2q are defined in Theorem In particular, we have a complete asymptotic expansion for ... error term in the first equation holds uniformly for all real numbers x by the comments after (15) and, since | cos(ux)| ≤ 1, the error term in the second equation holds uniformly for all real...

Ngày tải lên: 07/08/2014, 06:20