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101.
102.
Roy Rotstein Samir Mitragotri Martin Moskovits Daniel E. Morse 《Journal of Polymer Science.Polymer Physics》2014,52(9):611-617
The synthesis and characterization of highly ordered three‐dimensional photonic crystals have been the subjects of intense study over the past two decades due to the unique ability of these structures to control light at the nanoscale. Building on that work in recent years, increasing interest is now focused on the unique optical properties of disordered and quasi‐ordered photonic structures. We present a study of the effects of shape anisotropy and disorder on the specular reflection properties of polymer‐based colloidal films comprised of rod‐shaped subunits of varying aspect ratio. We characterize the specular reflectance properties of these films as a function of their increasing levels of disorder, demonstrating progressive transition from resonant reflection to diffuse reflection. The onset of the diffuse reflection is governed by particle size. © 2014 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys. 2014 , 52, 611–617 相似文献
103.
Arnab Mitra 《Comptes Rendus Mathematique》2019,357(11-12):827-831
Let denote the quasi-split unitary group over 2n variables with respect to a quadratic extension of p-adic fields. In this short note, we relate -distinction of ladder representations of with irreducibility of its Siegel parabolic induction in . 相似文献
104.
Chantry RL Siriwatcharapiboon W Horswell SL Logsdail AJ Johnston RL Li ZY 《The journal of physical chemistry. C, Nanomaterials and interfaces》2012,116(18):10312-10317
This study focuses on the deposition and growth mode of rhodium (Rh) on gold (Au) seed nanorods (NRs). Using a combination of scanning transmission electron microscopy imaging, energy-dispersive X-ray spectroscopy, and UV-visible absorption spectroscopy, we show that Rh deposition results in an uneven overlayer morphology on the Au NR seeds, with a tendency for Rh deposition to occur preferentially on the Au NR ends. The results suggest that complex and kinetically driven metal-metal interactions take place in this system. 相似文献
105.
The reaction of chloroacetyl chloride and triethylamine with a chiral imine derived from the combination of methyl glyoxylate and protected L-threonine gave two optically active α-amino acid derivatives with a cis-substituted β-lactam skeleton in a 72:28 ratio. The major product is obtained in 59% yield by simple crystallisation. 相似文献
106.
Dipak Ghosh Madhumita Lahiri Argha Deb Susobhan Das Krishnadas Purkait Biswanath Biswas Jayanta Roy Choudhury Rini Chatterjee Abdul Kayum Jafry 《The European Physical Journal C - Particles and Fields》2011,71(1):243-249
The scaled factorial moments and the multifractal moments have been investigated in different??-intervals to study the dynamical fluctuation of pions produced in 200 AGeV32S-Ag/Br interaction. In order to investigate the detail characteristics of intermittency behaviour, theF-moments are extracted up to the eighth order of moments in differentM-intervals. The analysis indicates a non-thermal phase transition and different regime of particle production during the hadronisation process. 相似文献
107.
R. G. Stebbins T. Roy T. R. Doane 《International journal of environmental analytical chemistry》2013,93(3):127-137
Abstract The 1-ethylmonocarboxylic acid of Malathion (MCA) was identified as a metabolite of Malathion in the gut of golden shiners (N. Chrysoleucas) (7.11 × 102±0.66 × 102 ng/g tissue). As noted in the literature the rate of hydrolysis of Malathion above pH 7 is first order with respect to Malathion and pH dependent. In addition, the rate of hydrolysis of Malathion in aquaria housing these fish was found to be dependent on the concentration of Ca+2; sparging the aquaria with air affected the rate. Some of the hydrolysis products of Malathion were identified by gc/ms and found to be pH dependent above pH 7. The half-life of Malathion under different conditions, the identification of some hydrolytic products and a general scheme for the analysis of Malathion, along with some of its metabolic and hydrolytic products are included in this paper. 相似文献
108.
The infectious disease burden imposed by trypanosomatidae family continues to create burden in countries that are least equipped
to bring new medicines to the clinic. For sickness caused by this family of parasites (African trypanosomiasis, Chagas disease,
and leishmaniasis) no vaccines are available, and currently available drugs suffer from insufficient efficacy, excessive toxicity,
and steady loss of effectiveness due to resistance. Availability of the genome sequence of pathogens of this family offers
a unique avenue for the identification of novel common drug targets for all three pathogens. Sirtuin family of nicotinamide
adenine dinucleotide (NAD)-dependent deacetylases are remarkably conserved throughout evolution from archaebacteria to eukaryotes
and plays an important role in trypanosomatidae biology and virulence. In order to gain insight for selective drug design,
three-dimensional (3D) models of L. major, L. infantum, T. brucie, and T. cruzi sirtuin were constructed by homology modeling and compared with human sirtuin. The molecular electrostatic potentials and
cavity depth analysis of these models suggest that the inhibitor binding catalytic domain has various minor structural differences
in the active site of trypanosomal and human sirtuin, regardless of sequence similarity. These studies have implications for
designing effective strategies to identify inhibitors that can be developed as novel broad-spectrum antitrypanosomal drugs. 相似文献
109.
R. S. Stein M. Sethumadhavan R. A. Gaudiana T. Adams D. Guarrera S. K. Roy 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(7):517-531
Abstract At present we have strong evidence that several members of a series of wholly-aromatic, para-linked, rodlike polyamides, polyesters, and polyesteramides form molecular composites with certain flexible-chain, thermoplastic polymers over a wide range of compositions. This paper reports on the initial results of an investigation of intermolecular interactions using spectroscopy and various scattering techniques as well as characterization of some of the mechanical and optical properties of these materials. The composites are made by two techniques: 1) photo-polymerization of a homogeneous solution of a rodlike polymer in a monomer containing a photoinitiation; 2) solvent evaporation from homogeneous solutions of very limited combinations of solvent, rodlike polymers and flexible polymers. While both of these techniques produce optically clear, nonscattering films of various thicknesses over the entire compositional range, e.g., 1–99 wt% of rodlike polymer, the latter is generally more convenient and has been used extensively in this study. Optical and electron microscopy, wide angle light scattering, and spectroscopic and thermal analysis support the view that these polymer combinations are truly molecularly dispersed. 相似文献
110.
Abstract Using methyl 2,2-bis(ethylthio)propionate as acetalating agent and triflic acid-sulfuryl chloride as catalyst, synthesis of 2,3-trans diequatorial pyruvate ketal was achieved. Starting from D-galactose and L-rhamnose derivatives, methyl 2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl-(1→4)-6-O-benzyl-2,3-O-(1-methoxycarbonyl)ethylidene- α-D-galactopyranosyl-(1→3)-2,4-di-O-benzyl-α-L-rhamnopyranoside and methyl 4,6-di-O-benzyl-2,3-O-(1-methoxy-carbonyl)ethylidene-α-D-galactopyranosyl-(1→3)-2,4-di-O-benzyl-α-L-rhamnopyranoside were synthesized. Removal of the protecting groups from the former, afforded the trisaccharide repeating unit of the K-antigen from E.coli O101:K103:H? in the form of its methyl glycoside methyl ester. 相似文献