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排序方式: 共有336条查询结果,搜索用时 93 毫秒
131.
Chiquito AJ Amorim CA Berengue OM Araujo LS Bernardo EP Leite ER 《J Phys Condens Matter》2012,24(22):225303
We report on the analysis of nonlinear current-voltage characteristics exhibited by a set of blocking metal/SnO(2)/metal. Schottky barrier heights in both interfaces were independently extracted and their dependence on the metal work function was analyzed. The disorder-induced interface states effectively pinned the Fermi level at the SnO(2) surface, leading to the observed Schottky barriers. The model is useful for any two-terminal device which cannot be described by a conventional diode configuration. 相似文献
132.
Ksenia Oguievetskaia Laetitia Martin-Chanas Artem Vorotyntsev Olivia Doppelt-Azeroual Xavier Brotel Stewart A. Adcock Alexandre G. de Brevern Francois Delfaud Fabrice Moriaud 《Journal of computer-aided molecular design》2009,23(8):571-582
Eg5, a mitotic kinesin exclusively involved in the formation and function of the mitotic spindle has attracted interest as
an anticancer drug target. Eg5 is co-crystallized with several inhibitors bound to its allosteric binding pocket. Each of
these occupies a pocket formed by loop 5/helix α2 (L5/α2). Recently designed inhibitors additionally occupy a hydrophobic
pocket of this site. The goal of the present study was to explore this hydrophobic pocket with our MED-SuMo fragment-based
protocol, and thus discover novel chemical structures that might bind as inhibitors. The MED-SuMo software is able to compare
and superimpose similar interaction surfaces upon the whole protein data bank (PDB). In a fragment-based protocol, MED-SuMo
retrieves MED-Portions that encode protein-fragment binding sites and are derived from cross-mining protein-ligand structures
with libraries of small molecules. Furthermore we have excluded intra-family MED-Portions derived from Eg5 ligands that occupy
the hydrophobic pocket and predicted new potential ligands by hybridization that would fill simultaneously both pockets. Some
of the latter having original scaffolds and substituents in the hydrophobic pocket are identified in libraries of synthetically
accessible molecules by the MED-Search software.
Ksenia Oguievetskaia and Laetitia Martin-Chanas contributed equally to this work. 相似文献
133.
134.
Pickering stabilization is a facile method to create composite colloidal particles. Inorganic colloidal SiO2 nanoparticles are often used as the stabilizer for particles instead of the more common amphiphilic surfactants. Here the use of this approach in radical‐mediated thiol‐ene suspension polymerizations using monomers 1,3,5‐triallyl‐1,3,5‐triazine‐2,4,6(1H,3H,5H)‐trione (TTT) and pentaerythritol tetrakis (3‐mercaptopropionate) (PETMP) is described. The resulting micron‐sized crosslinked poly(thioether) colloidal particles are coated with 80 nm silica nanoparticles. The addition of a small amount of various costabilizers is examined (hexadecane, cetyl alcohol and toluene), and while all yielded particles, cetyl alcohol provide more consistent results. Scanning electron microscopy and thermal analysis of the composite particles demonstrate morphologies that are consistent with a raspberry‐like structure. No significant changes to the glass transition temperature are observed, which is consistent with the silica nanoparticles being located at the surface of the polymer particles. 相似文献
135.
136.
Eduardo Corts Corts Raúl Salazar Franco Olivia García Mellado 《Journal of heterocyclic chemistry》2001,38(3):663-669
A series of twelve new 2‐[(o‐ and p‐substituted)aminophenyl]‐3H‐5‐[(o‐ and p‐substituted)phenyl]‐7‐chloro‐1,4‐benzodiazepines, which have possible pharmacological properties has been obtained. The synthesis was carried out following six steps. The structure of all products was corroborated by ir, 1H nmr, 13C nmr and ms. In addition for the compound 2‐(o‐chloroaminophenyl)‐3H‐5‐(o‐fluorophenyl)‐7‐chloro‐1,4‐benzodiazepine 7, its structure was confirmed by X‐ray diffraction. 相似文献
137.
Faye M. A. Langston James M. Monaghan Olivia Cousins Geoffrey R. Nash John R. Bows Gemma Chope 《Molecules (Basel, Switzerland)》2022,27(10)
Light quality has been reported to influence the phytochemical profile of broccoli sprouts/microgreens; however, few studies have researched the influence on mature broccoli. This is the first study to investigate how exposing a mature glasshouse grown vegetable brassica, Tenderstem® broccoli, to different light wavelengths before harvest influences the phytochemical content. Sixty broccoli plants were grown in a controlled environment glasshouse under ambient light until axial meristems reached >1 cm diameter, whereupon a third were placed under either green/red/far-red LED, blue LED, or remained in the original compartment. Primary and secondary spears were harvested after one and three weeks, respectively. Plant morphology, glucosinolate, carotenoid, tocopherol, and total polyphenol content were determined for each sample. Exposure to green/red/far-red light increased the total polyphenol content by up to 13% and maintained a comparable total glucosinolate content to the control. Blue light increased three of the four indole glucosinolates studied. The effect of light treatments on carotenoid and tocopherol content was inconclusive due to inconsistencies between trials, indicating that they are more sensitive to other environmental factors. These results have shown that by carefully selecting the wavelength, the nutritional content of mature broccoli prior to harvest could be manipulated according to demand. 相似文献
138.
139.
Olivia Lipovan 《Journal of Mathematical Analysis and Applications》2003,285(2):436-443
We prove a retarded nonlinear integral inequality and present some applications of it to the global existence of solutions to differential equations with time delay. 相似文献
140.
effect of horseradish peroxidase (HRP) and H2O2 concentrations on the removal efficiency of phenol, defined as the percentage of phenol removed from solution as a function
of time, has been investigated. When phenol and H2O2 react with an approximately one-to-one stoichiometry, the phenol is almost completely precipitated within 10 min. The reaction
is inhibited at higher concentrations of H2O2. The removal efficiency increases with an increase in the concentration of HRP, but an increase in the time of treatment
cannot be used to offset the reduction in removal efficiency at low concentrations of the enzyme, because of inactivation
of the enzyme. One molecule of HRP is needed to remove approximately 1100 molecules of phenol when the reaction is conducted
at pH 8.0 and at ambient temperature. 相似文献