Güncel Gönderiler: Makale Koleksiyonu
Toplam kayıt 1058, listelenen: 881-900
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Atomic Layer Deposition of Ultrathin Nickel Sulfide Films and Preliminary Assessment of Their Performance as Hydrogen Evolution Catalysts
(American Chemical Society, 2016)Transition metal sulfides show great promise for applications ranging from catalysis to electrocatalysis to photovoltaics due to their high stability and conductivity. Nickel sulfide, particularly known for its ability to ... -
Oxidation of 2,3,6-trimethylphenol with potassium peroxymonosulfate catalyzed by iron and cobalt phthalocyanine tetrasulfonates in a methanol-water mixture
(Elsevier Science BV, 2008)Oxidation of 2,3,6-trimethylphenol (TMP) with potassium peroxymonosulfate (KHSO5) catalyzed by iron phthalocyanine tetrasulfonate ([FePcTS]) in an 8-to-1 methanol-water mixture resulted in 43.2-100.0% conversion of TMP and ... -
Voltammetric and amperometric determination of metoclopramide on boron-doped diamond film electrode
(Versita, 2012)New methods for the determination of metoclopramide, antiemetic and gastroprokinetic pharmaceutical, were developed, using differential pulse voltammetry (DPV) and flow injection analysis (FIA) with amperometric detection ... -
Synthesis, characterization, electrochemistry and VOC sensing properties of novel ball-type dinuclear metallophthalocyanines
(Elsevier Science Sa, 2014)New homodinuclear ball-type Cu(II)-Cu(II) 4, Zn(II)-Zn(II) 5, and Co(II)-Co(II) 6 phthalocyanines were synthesized from 4,4'-(9H-fluorene-9-yl-dimethoxy)diphthalonitrile 3, which was obtained by the reaction of ... -
A naturally occuring triterpene saponin ardisiacrispin B displayed cytotoxic effects in multi-factorial drug resistant cancer cells via ferroptotic and apoptotic cell death
(Elsevier GMBH, Urban & Fischer Verlag, 2018)Introduction: Multidrug resistance of cancer cells constitutes a serious problem in chemotherapy and a challenging issue in the discovery of new cytotoxic drugs. Many saponins are known to display anti-cancer effects. In ... -
Facile, efficient, and environmentally friendly alpha- and aromatic regioselective chlorination of toluene using KHSO5 and KCl under catalyst-free conditions
(Royal Soc Chemistry, 2015)Toluene was subjected to room-temperature chlorination with the KHSO5-KCl system in organic solvent-water mixtures. In a typical reaction, the amounts of toluene, KHSO5, and KCl were 1.0, 5.0 and 7.5 millimoles, respectively. ... -
Determination of the LO phonon energy by using electronic and optical methods in AlGaN/GaN
(De Gruyter Open LTD, 2012)The longitudinal optical (LO) phonon energy in AlGaN/GaN heterostructures is determined from temperature-dependent Hall effect measurements and also from Infrared (IR) spectroscopy and Raman spectroscopy. The Hall effect ... -
Benzotriazole-mediated amidoalkylations of nitroalkanes, nitriles, alkynes and esters
(Arkat Usa Inc, 2007)Reactions of readily available and stable N-(alpha-amidoalkyl)benzotriazoles 1 ( derived from a variety of aliphatic, aromatic or heterocyclic aldehydes) with diverse nitroalkanes, nitriles, alkynes and esters afforded ... -
Convenient synthesis of C-terminal di- and tri-peptide amides from N-protected dipeptidoylbenzotriazoles
(Pergamon-Elsevier Science LTD, 2009)N-Protected dipeptidoylbeiizotriazoles react with aqueous ammonia to give dipeptide primary amides (77-98%) and with N-unprotected alpha-amino amides to afford tripeptide primary amides (82-86%). -
Antibacterial activities of the methanol extract, fractions and compounds from Elaeophorbia drupifera (Thonn.) Stapf. (Euphorbiaceae)
(Biomed Central LTD, 2017)Background: Elaeophorbia drupifera (Thonn.) Stapf. (Euphorbiaceae) is used in Cameroonian folk medicine to treat several ailments including bacterial-related diseases such as skin infections. In this study, the methanol ... -
In vitro antibacterial and antibiotic modifying activity of crude extract, fractions and 3 ', 4 ', 7-trihydroxyflavone from Myristica fragrans Houtt against MDR Gram-negative enteric bacteria
(Biomed Central LTD, 2018)Background: Nutmeg is the seed kernel inside the fruit of Myristica fragrans Houtt. (Myristicaceae). It possesses various pharmacological activities but is used in Cameroon only for its flavor in making cakes. The present ... -
Antibacterial activities of the methanol extracts, fractions and compounds from Harungana madagascariensis Lam. ex Poir. (Hypericaceae)
(Elsevier Ireland LTD, 2016)Ethnopharmacological relevance: Harungana madagascariensis Lam. ex Poir. (Hypericaceae) is used in folk medicine to treat a variety of human ailments, mainly antibacterial, antifungal, antiviral and viral infections. In ... -
N-(alpha-Amidoalkyl)benzotriazole-mediated synthesis of beta '-amido beta-diketones: a general synthetic protocol for N-[beta-(3,5-di and 1,3,5-trisubstituted pyrazol-4-yl)alkyl] amides
(Pergamon-Elsevier Science LTD, 2009)Various beta '-amido-beta-diketones were first synthesized with N-(alpha-amidoalkyl)benzotriazole-mediated amidoalkylation of 1,3-diketones in moderate yields. These intermediates undergo rapid condensation with hydrazines ... -
Electrochemical synthesis, characterization and capacitive properties of novel thiophene based conjugated polymer
(Elsevier Science BV, 2014)In this paper, a novel thiophene based monomer, 1-(pyren-1-yl)-2,5-di(thiophen-2-yl)-1H-pyrrole, PThP, was synthesized and characterized by H-1 NMR and C-13 NMR spectroscopic methods. The electrochemical behavior and ... -
Guttiferone BL with antibacterial activity from the fruits of Allanblackia gabonensis
(Taylor & Francis LTD, 2019)Allanblackia genus, an endless source of bioactive compounds, was investigated for its antibacterial properties. The chemical study of the methanol extract from the fruits of Allanblackia gabonensis resulted in the isolation ... -
Synthesis of 4-hydroxyquinoline-2,3-dicarboxylates using N-(2-aminobenzoyl)benzotriazoles
(Pergamon-Elsevier Science LTD, 2017)A method for the preparation of 4-hydroxyquinoline-2,3-dicarboxylates has been developed by aza-Michael addition reaction of N-(2-aminobenzoyl)benzotriazoles with dimethyl acetylenedicarboxylate. 4-Hydroxyquinoline-2,3-d ... -
Motion of the charged test particles in Kerr-Newman-Taub-NUT spacetime and analytical solutions
(Amer Physical Soc, 2016)In this work, we study the motion of charged test particles in Kerr-Newman-Taub-NUT spacetime. We analyze the angular and the radial parts of the orbit equations and examine the possible orbit types. We also investigate ... -
The Dirac equation in Kerr-Taub-NUT spacetime
(IOP Publishing LTD, 2013)We study the Dirac equation in the Kerr-Taub-NUT spacetime. We use Boyer-Lindquist coordinates and separate the resulting equations into radial and angular parts. We obtain some exact analytical solutions of the angular ... -
Finite mass gravitating Yang monopoles
(Amer Physical Soc, 2008)We show that gravity cures the infrared divergence of the Yang monopole when a proper definition of conserved quantities in curved backgrounds is used, i.e. the gravitating Yang monopole in cosmological Einstein theory has ... -
Klein-Gordon particles in symmetrical well potential
(Elsevier Science Inc, 2016)An approximate analytical solution of the KleinGordon equation for the equal scalar and vector symmetrical well potential is presented in this study. The energy eigenvalue equation and corresponding wave functions for ...
