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Molecular dynamics simulation of the sliding of distamycin anticancer drug along DNA: interactions and sequence selectivity
Springer Science and Business Media LLC - Tập 14 - Trang 531-540 - 2016
Seifollah Jalili, Mina Maddah
Molecular dynamics simulations and umbrella sampling have been used to investigate the sliding of distamycin anticancer drug along the DNA minor groove. The potential energy surface calculated for the sliding of drug shows three minima. The global minimum corresponds to the binding of drug to the AT-rich region, which is the origin of sequence selectivity of distamycin. This selectivity originates...... hiện toàn bộ
Proteomic profiling of the rat hippocampus from the kindling models of electrical epilepsy and treatment with low-frequency deep brain stimulation: the important role of the cytoskeleton
Springer Science and Business Media LLC - Tập 20 - Trang 2491-2499 - 2023
Samira Ranjbar, Bahareh Dabirmanesh, Elahe Dashtban-Moghadam, Javad Mirnajafi-Zadeh, Khosro Khajeh
Epilepsy is one of the most common neurological diseases and affects 1–2% of the world’s population. Epilepsy is associated with recurrent and unpredictable seizures. Since 20% of epileptic patients suffer from drug resistance, much research is being done to find new ways to treat epilepsy. One of the new therapies is low-frequency deep brain stimulation (L-DBS). Although this method has an antico...... hiện toàn bộ
Synthesis of pure nano Cr2O3 from chromite ore by a novel method and investigation of its composites with bentonite for their photocatalytic properties
Springer Science and Business Media LLC - Tập 20 - Trang 2805-2819 - 2023
Maasoumeh Khatamian, Elham Dastar, Sara Fazli-Shokouhi, Shamin Hosseini Nami
In the present study, nano Cr2O3 was prepared with a novel method from chromite ore. In this method, K2Cr2O7 was prepared by alkaline melting of chromite ore. Then, the precursor complex K3[Cr(C2O4)3] was prepared using potassium dichromate obtained from chromite ore and Merck Co. for comparing their purity. Therefore, two types of nano (Cr2O3)M or ch (M = Merck, ch = chromite ore) were prepared b...... hiện toàn bộ
Ag3PO4/AgSbO3 composite as novel photocatalyst with significantly enhanced activity through a Z-scheme degradation mechanism
Springer Science and Business Media LLC - Tập 19 - Trang 821-838 - 2021
Chen Chen, Lei Wang, Ting Cheng, Xiaoqin Zhang, Zhiyi Zhou, Xiao Zhang, Qi Xu
In this work, a new composite photocatalyst, combined with Ag3PO4 and AgSbO3 (AZA Catalyst), was elaborately designed, successfully synthesized, and characterized by many techniques, such as XRD, UV-DRS, SEM–EDS, XPS, and TEM. Then, the AZA Catalyst was applied for the photocatalytic degradation of Methylene Blue (MB) and tetracycline. The results showed that AZA Catalyst could effectively degrade...... hiện toàn bộ
Preconcentration and determination of low amounts of cobalt in black tea, paprika and marjoram using dispersive liquid–liquid microextraction and flame atomic absorption spectrometry
Springer Science and Business Media LLC - Tập 12 - Trang 51-56 - 2014
S. Bahar, B. Babamiri
A dispersive liquid–liquid microextraction (DLLME) method for separation/preconcentration of ultra trace amounts of Co(II) and its determination with FAAS was developed. The DLLME behavior of Co(II) using Aliquat 336-chloride as ion pairing agent was systematically investigated. The factors influencing the ion pair formation and extraction by DLLME method were optimized. Under the optimized condit...... hiện toàn bộ
Kinetics and mechanism of oxidation of 1,2-butanediol by argentate(III) complex in alkaline medium
Springer Science and Business Media LLC - Tập 3 - Trang 180-184 - 2006
S. -Y. Huo, J. -H. Shan, S. -G. Shen, H. -W. Sun
The kinetics of oxidation of 1,2-butanediol by dihydroxyditellutoargentate(III) (DDA) is studied spectrophotometrically. The reaction rate shows first order dependence in DDA and 1 < nap < 2 order in 1,2-butanediol. It is found that the pseudo-first order rate constant k obs increases with the increase in concentration of OH− and decreases with the increase in concentration of TeO4...... hiện toàn bộ
One-pot conversion of alkyl halides to organic disulfides (disulfanes) using thiourea and hexamethyldisilazane (HMDS) in DMSO
Springer Science and Business Media LLC - Tập 13 - Trang 81-86 - 2015
Mohammad Abbasi, Arida Jabbari
A practical method to synthesize symmetric disulfides from alkyl halides has been developed. Using this procedure primary, secondary, benzylic and allylic disulfides were prepared by treating the corresponding alkyl halides with thiourea and HMDS in DMSO at 50 °C within 10–24 h in high yields.
Synthesis and characterization of N-hydroxyphthalimide immobilized on SiO2-coated Fe3O4 nanoparticles as magnetic catalyst for oxidation of benzyl alcohols and hydrocarbons
Springer Science and Business Media LLC - Tập 15 - Trang 893-904 - 2018
Rahman Hosseinzadeh, Mohammad Mavvaji, Mahmood Tajbakhsh, Zahra Lasemi
In this study, N-hydroxyphthalimide (NHPI) was successfully attached on functionalized SiO2-coated Fe3O4 nanoparticles through amid bond. The sustained nanomagnetite-immobilized NHPI as a new magnetically recoverable catalyst was characterized by FT-IR, XRD, TGA, VSM, TEM and SEM techniques. The prepared catalyst exhibited high selectivity for oxidation of various benzyl alcohols and hydrocarbons ...... hiện toàn bộ
Synthesis of lithium/cesium-Zagronas from zagrosian natural asphalt and study of their activity as novel, green, heterogeneous and homogeneous nanocatalysts in the Claisen–Schmidt and Knoevenagel condensations
Springer Science and Business Media LLC - Tập 18 - Trang 3267-3279 - 2021
Mohammad Soleiman-Beigi, Saba Ghalavand, Hadis Gholami Venovel, Homa Kohzadi
A novel, heterogeneous and homogeneous basic nanocatalysts were synthesized by grafting of lithium and cesium on zagrosian natural asphalt sulfonate (Li/Cs-Zagronas). The activity of these catalysts was examined in the Claisen–Schmidt and Knoevenagel condensations under mild reaction conditions. Li/Cs-Zagronas were characterized by FT-IR spectroscopy, scanning electron microscopy, X-ray diffractio...... hiện toàn bộ
Perlite–SO3H nanoparticles: very efficient and reusable catalyst for three-component synthesis of N-cyclohexyl-3-aryl-quinoxaline-2-amine derivatives under ultrasound irradiation
Springer Science and Business Media LLC - Tập 15 - Trang 2375-2382 - 2018
Morteza Rouhani, Ali Ramazani
An efficient green approach for the synthesis of N-cyclohexyl-3-aryl-quinoxaline-2-amine derivatives, via a three-component one-pot condensation reaction of o-phenylenediamine, aromatic aldehydes and cyclohexyl isocyanide in the presence of perlite–SO3H nanoparticles (diameter/thickness of platelets < 100 nm) under ultrasound irradiation has been demonstrated. The present method offers advantages ...... hiện toàn bộ
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