We report the synthesis of a unique cubic metal–organic framework (MOF), Fe-HHTP-MOF, comprising hexahydroxytriphenylene (HHTP) supertetrahedral units and FeIII ions, arranged in diamond topology. The MOF is synthesized under solvothermal conditions, yielding highly crystalline, deep black powder, with crystallites 300–500 nm size tetrahedral morphology. Nitrogen sorption analysis indicates por...

researches prove that effective customer management along with using customer knowledge is one of the topics that can produce competitive advantage in comparison with the other e-commerce topics. mining the customer knowledge with the aim of helping the managers in better ad strategy making will be possible using the systems with ability of extracting the behavioral patterns of customers from d...

statement of problem: a general process in implant design is to determine the reason of possible problems and to find the relevant solutions. the success of the implant depends on the control technique of implant biomechanical conditions. objectives: the goal of this study was to evaluate the influence of both abutment and framework materials on the stress of the bone around the implant by usin...

The one-dimensional cutting stock problem, has so many applications in lots of industrial processes and during the past few years has attracted so many researchers’ attention all over the world. In this paper a meta-heuristic method based on ACO is presented to solve this problem. In this algorithm, based on designed probabilistic laws, artificial ants do select various cuts and then select the...

Sieve trays are widely used in the gas- liquid contactors such as distillation and absorption towers. In this article, a three-dimensional, two phase CFD model using Euler-Euler framework was developed to simulate a distillation tower with two sieve trays. Hydrodynamic simulation of air and water system in different rates of gas phase was carried out and velocity distribution parameters, clear ...

A new porphyrin-based microporous MOF, {Mn(II)0.5[Mn(II)4Cl(Mn(III)Cl-ttzpp)2(H2O)4]}·(DEF)20·(CH3OH)18·(H2O)12 (UTSA-57), has been constructed from {5,10,15,20-tetrakis[4-(2,3,4,5-tetrazolyl)phenyl]porphyrinato} manganese(III) chloride as the metalloligand. The MOF adopts the rare scu topology with one-dimensional square nanotube-like channels of about 20 Å. UTSA-57a exhibits permanent porosit...