نتایج جستجو برای: octadecyl slica disks

تعداد نتایج: 18172  

Journal: :Inorganic chemistry 2006
Rajendra Shakya Paul H Keyes Mary Jane Heeg Azzam Moussawel Paul A Heiney Claudio N Verani

A new ligand containing long alkyl (octadecyl) chains was used to obtain the mesogenic complex [L2Cu4(mu4-O)(OAc)4].EtOH (1). This complex was thoroughly characterized and had its molecular structure solved by X-ray diffraction (XRD). Mesomorphic properties were demonstrated by means of polarized microscopy, differential scanning calorimetry, and XRD.

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In this study, organic-mineral hybrid silica coating was prepared by sol-gel process, in order to investigate the effect of Dimethyl octadecyl amin propyl group on TMOS wettability. The sol solutions were prepared at room temperature by hydrolysis and condensation of tetra methoxysilane (TMOS) diluted in methanol as solvent and in the presence of acetic acid as a catalyst and dimethylacetaldehy...

A.K Thawait, L Sondhi Sh Bhowmick Sh Sanyal

The present study deals with the elastic analysis of concave thickness rotating disks made of functionally graded materials (FGMs).The analysis is carried out using element based gradation of material properties in radial direction over the discretized domain. The resulting deformation and stresses are evaluated for free-free boundary condition and the effect of grading index on the deformation...

p { margin-bottom: 0.1in; direction: ltr; line-height: 120%; text-align: left; }a:link { } In this paper, the evolution of accretion disks in the post-Newtonian limit has been investigated. These disks are formed around gravitational compact objects such as black holes, neutron stars, or white dwarfs. Although most analytical researches have been conducted in this context in the framework o...

Journal: :iranian journal of microbiology 0
neda saffari department of biotechnology, faculty of biological sciences, alzahra university, tehran, ir iran siavosh salmanzadeh-ahrabi ahya abdi-ali mohsen rezaei-hemami

background and objectives: antibacterial susceptibility testing of clinical bacterial isolates through disk diffusion method plays a major role in antibacterial treatment. one of the main factors affecting the result of these tests is the type, structure and quality of the disks. the main objective of this study was to compare the agreement of antibiotic disks originated from three companies on...

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2004
Makoto Takafuji Megumi Fukui Hamid R Ansarian Mahnaz Derakhshan Atsuomi Shundo Hirotaka Ihara

Poly(octadecyl acrylate) with a terminal reactive group was synthesized by radical telomerization in various solvents. The polymers were grafted onto porous silica for use in RP-HPLC, and the molecular recognition ability was investigated along with the selectivity for the structural isomers of polycyclic aromatic hydrocarbons. The mechanism of selectivity was also investigated with differentia...

Journal: :Chemical communications 2007
Itzia Cruz-Campa Alejandro Arzola Lynn Santiago Jason G Parsons Armando Varela-Ramirez Renato J Aguilera Juan C Noveron

The bis-complexes [Cu(L(dt))(2)](OTf)(2) (1) and [Cu(L(ot))(2)](OTf)(2) (2), where L(dt) = 1-dodecyl-1,4,7-triazacyclononane, L(ot) = 1-octadecyl-1,4,7-triazacyclononane and OTf = trifluoromethanesulfonate, formed a novel class of metallo-liposomes in water that transfect pEGFP-N1 plasmids into HEK 293-T cells at 38% and 4% efficiency, respectively.

Journal: :The Analyst 2011
Yan Liu Anwei Zhu Yang Tian

A new and facile assay for hydroxyl radicals in photocatalytic systems is reported for the first time that is based on the fluorescence imaging of increasing hydrophilic regions through the highly selective hydroxyl radical-induced lateral remote oxidation of superhydrophobic 1-octadecanethiol molecules at gold flower-like surface in the designed photomask setup.

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