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排序方式: 共有195条查询结果,搜索用时 906 毫秒
101.
Zohreh Khayat 《Soft Materials》2019,17(2):150-158
Four glucose-based phase selective organogelators were designed and synthesized from low-cost and readily available starting materials. Our rapid acting supergelators were able to gelate a wide spectrum of solvents in mono- or biphasic systems, at very low concentration. They were shown to solidify oil spills at room temperature, in the form of a semi-dried gel, within 90 min. It was also revealed that their n-butanol gel could effectively absorb pollutant dyes from aqueous media. As novel smart materials, these gelators are potentially applicable to remove contaminants including aromatic solvents, oil spills, and toxic dyes from water resources. The gelators have been well characterized using spectroscopic, microscopic, and rheological studies. 相似文献
102.
Mohammad Bakherad Ali Keivanloo Zohreh Bakherad Zahra Toozandejani Mohamad Mahdavi 《中国化学会会志》2019,66(6):674-682
Magnetized water (MW) is used as a green and new solvent‐promoting medium for the one‐pot, three‐component synthesis of novel 1,2,3‐triazole‐linked indoles catalyzed by copper iodide. A broad range of 2‐aryl‐1‐(prop‐2‐ynyl)‐1H‐indole‐3‐carbaldehydes were reacted with alkyl halides and sodium azide via copper‐catalyzed azide–alkyne cycloaddition reactions in MW in the absence of any ligand. This method offers the advantages of short reaction times, green procedure, low cost, simple work‐up, quantitative reaction yields, and no need for any organic solvent. 相似文献
103.
We investigate decay properties of the intermediate vector bosons W± and Z0. QED and QCD radiative corrections to leptonic and hadronic decay modes are calculated. Implications of the results for decay widths, branching ratios, determination of the number of neutrino species, e-μ-τ universality and properties of hadronic jets produced in W± and Z0 decays are examined. 相似文献
104.
Mojgan Afkhami Kazem Khashyarmanesh Zohreh Rajabi 《Czechoslovak Mathematical Journal》2017,67(1):151-169
Let R be a commutative ring. The annihilator graph of R, denoted by AG(R), is the undirected graph with all nonzero zero-divisors of R as vertex set, and two distinct vertices x and y are adjacent if and only if ann R (xy) ≠ ann R (x) ∪ ann R (y), where for z ∈ R, ann R (z) = {r ∈ R: rz = 0}. In this paper, we characterize all finite commutative rings R with planar or outerplanar or ring-graph annihilator graphs. We characterize all finite commutative rings R whose annihilator graphs have clique number 1, 2 or 3. Also, we investigate some properties of the annihilator graph under the extension of R to polynomial rings and rings of fractions. For instance, we show that the graphs AG(R) and AG(T(R)) are isomorphic, where T(R) is the total quotient ring of R. Moreover, we investigate some properties of the annihilator graph of the ring of integers modulo n, where n ? 1. 相似文献
105.
Zohreh Tavassoli Robert W. Zimmerman Martin J. Blunt 《Transport in Porous Media》2005,58(1-2):173-189
We study counter-current imbibition, where a strongly wetting phase (water) displaces non-wetting phase spontaneously under the influence of capillary forces such that the non-wetting phase moves in the opposite direction to the water. We use an approximate analytical approach to derive an expression for saturation profile when the viscosity of the non-wetting phase is non-negligible. This makes the approach applicable to water flooding in hydrocarbon reservoirs, or the displacement of non-aqueous phase liquid (NAPL) by water. We find the recovery of non-wetting phase as a function of time for one-dimensional flow. We compare our predictions with experimental results in the literature. Our formulation reproduces experimental data accurately and is superior to previously proposed empirical models. 相似文献
106.
Elham?Shoghi Seyede?Zohreh?Mirahmadi-ZareEmail authorView authors OrcID profile Razieh?Ghasemi Matine?Asghari Mansour?Poorebrahim Mohammad-Hossein?Nasr-Esfahani 《Mikrochimica acta》2018,185(4):241
The authors introduce a new kind of surface artificial biomimetic receptor, referred to as aptameric imprinted polymer (AIP), for separation of biological macromolecules. Highly dispersed magnetic nanoparticles (MNPs) were coated with silica and then functionalized with methacrylate groups via silane chemistry. The aptamer was covalently immobilized on the surface of nanoparticles via a “thiol-ene” click reaction. Once the target analyte (bovine serum albumin; BSA) has bound to the aptamer, a polymer is created by 2-dimensional copolymerization of short-length poly(ethylene glycol) and (3-aminopropyl)triethoxysilane. Following removal of BSA from the polymer, the AIP-MNPs presented here can selectively capture BSA with a specific absorbance (κ) as high as 65. When using this AIP, the recovery of BSA from spiked real biological samples is >97%, and the adsorption capacity is as high as 146 mg g?1. In our perception, this method has a wide scope in that it may be applied to the specific extraction of numerous other biomolecules. 相似文献
107.
Isatin‐SO3H coated on amino propyl modified magnetic nanoparticles (Fe3O4@APTES@isatin‐SO3H) is found to be a novel, efficient, and reusable magnetic nanocatalyst, and characterized by FT‐IR, SEM, TEM, XRD, EDX, VSM, and TGA analysis. The magnetic nanocatalyst demonstrated outstanding performance in synthesis of pyrano[2,3‐d] pyrimidines derivatives via one‐pot three‐component reaction of various aromatic aldehydes 1, malononitrile 2, and barbituric acid 3 under reflux conditions in mixture of H2O:EtOH (1:1) as solvent. Easy workup procedure, short reaction time, high yield, simple preparation and easy recovery of the catalyst, mild reaction conditions are some advantages of this work. 相似文献
108.
Research on Chemical Intermediates - This paper presents the sonochemical synthesis of a new hetero-metallic inorganic complex, formulated as [(Sr(OH2)5Ce(dipic)3Sr(OH2)6][Ce(dipic)3]·6H2O... 相似文献
109.
Mortezaei Zohreh Zendehdel Mojgan Bodaghifard Mohammad Ali 《Research on Chemical Intermediates》2020,46(4):2169-2193
Research on Chemical Intermediates - In this work, magnetic nanocomposite of NaP Zeolite and CoFe2O4 as magnetic nanoparticles (MNP’s) with different ratios were prepared and in the second... 相似文献
110.
Pozveh Azam Abedini Kowsari Elaheh Hashemi Mohammad Mahmoudi Mirjafari Zohreh 《Research on Chemical Intermediates》2020,46(2):1329-1351
Research on Chemical Intermediates - This paper presents the preparation of a new epoxy nanocomposite of functionalized graphene oxide (FGO) and iron pentacarbonyl [Fe(CO)5] (IPC) as... 相似文献