Başlık için Fen Fakültesi listeleme
Toplam kayıt 2379, listelenen: 27-46
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An ab initio study on protonation of some substituted thiazole derivatives
(Elsevier Science BV, 2005)The preferred tautomeric forms of some 2-oxothiazole derivatives were predicted using acidity constants calculated by experimental and ab initio methods. Thiazole derivatives were subject to geometry optimization at two ... -
The ability of students to comprehend the function-derivative relationship with regard to problems from their real life
(2009)This study investigated whether students who are studying calculus were able to determine the graph of the derivative of the functions related to the problems they come across in their daily lives or in applied science. A ... -
Absorption and emission processes in noncommutative space
(World Scientific Publ Co Pte LTD, 2006)Atom-field interaction and absorption, emission of photons in noncommutative space are investigated. We calculate the rate and the directional distribution of the radiation. The modified selection rules which govern allowed ... -
Absorption mechanism, structural and electronic properties of MC19 (M = B and Si) fullerenes with 1-acetylpiperazine
(Sage Publications Inc, 2018)The interaction mechanisms of undoped, silicon- and boron-doped C20 fullerenes and 1-acetylpiperazine (1-ap) were investigated. Stability, electronic properties, influence of water on the solubility and stability, molecular ... -
Ac electrical properties of Cu (Zn, Cd) $InS_2$ films produced by the spray pyrolysis method
(2003)M-Cu(Zn,Cd)$InS_2$-M bileşik yarıiletkenler planar formda "spray pyrolysis" yöntemiyle elde edilmiştir. Film iletkenliğinin $(omega)$ frekansa $(sigma)$ bağımlılığı incelenmiştir. Yüksek frekanslarda iletkenliğin $omega^s$ ... -
Accelerating backpropagation using effective parameters at each step and an experimental evaluation
(Taylor & Francis LTD, 2008)An acceleration of backpropagation algorithm with momentum (BPM) is introduced. At every stage of the learning process, local quadratic approximation of the error function is performed and the Hessian matrix of the quadratic ... -
Acceptor formation in Mg-doped, indium-rich GaxIn1-xN: evidence for p-type conductivity
(Springer, 2012)We report on the Mg-doped, indium-rich Ga (x) In1-x N (x < 30). In the undoped material, the intrinsic electron density is very high and as a result there is no detectable photoconductivity (PC) signal within the range of ... -
Acid pH produced by lactic acid bacteria prevent the growth of Bacillus cereus in boza, a traditional fermented Turkish beverage
(Blackwell Publishing Inc, 2005)The growth and survival of Bacillus cereus, a known pathogen commonly found in cereals, during lactic acid fermentation of boza, a traditional Turkish cereal beverage, was studied. In the boza base inoculated with both the ... -
Acid treated mordenites as adsorbents of C2H4 and H-2 gases
(Elsevier Science BV, 2017)In this study, a mordenite-rich tuff (M) from the Sile region (NW Turkey) was treated with HNO3 and H2SO4 at various concentrations (1.0, 3.0 and 5.0 M) at 80 degrees C for 3 h. The adsorption properties of ethylene (C2H4) ... -
The acidities of some indoles
(Elsevier Science BV, 2002)We wish to present an experimental and theoretical study for the estimation of pK(a) values of some 1-, 2- and 1,2-substituted indoles in aqueous solution by spectroscopic and semiempirical methods. The all possible ... -
Acidity constant determination of novel drug precursor benzothiazolon derivatives including acyl and piperazine moieties
(Pergamon-Elsevier Science LTD, 2013)In this study, protonation and deprotonation behaviors of eight new drug precursor benzothiazolon derivatives in all of acidic and basic scale (super acidic, pH, super basic regions) are analyzed by using UV-visible ... -
Acidity study on 3-substituted pyridines
(MDPI AG, 2005)A comprehensive theoretical study for the protonation of some 3-substituted pyridines has been carried out in aqueous solution (epsilon = 78.4) by semi empirical AM1 method in MOPAC2000 and PM5 method in MOPAC2002. Solvent ... -
Acidity study on some pyridazines
(Elsevier Science BV, 2004)The tautomeric, conformational equilibrium positions, and pK(a) values of some pyridazine derivatives 1-17 have been examined by means of semi empirical AM1 COSMO calculations in aqueous solution (epsilon=78.4). The results ... -
Acrylamide exerts its cytotoxicity in NIH/3T3 fibroblast cells by apoptosis
(Sage Publications Inc, 2018)Objective: Acrylamide is a chemical utilized in various industries, and many studies have demonstrated its toxicity. The NIH/3T3 mouse embryonic cell line is the standard cell line of fibroblasts, which have a pivotal role ... -
Acrylamide has cytotoxic, antiproliferative and apoptotic effects on human lung adeno carcinoma cell line A549
(Wiley-Blackwell, 2016)… -
Acrylamide-derived cytotoxic, anti-proliferative, and apoptotic effects on A549 cells
(SAGE Publications LTD, 2018)Background: Acrylamide is a very common compound even reaching up to our daily foods. It has been studied in a wealth of cell lines on which it proved to have various toxic effects. Among these cell lines, human lung ... -
Activated Carbons From Grape Seeds By Chemical Activation With Potassium Carbonate And Potassium Hydroxide
(Elsevier, 2014)Activated carbons were produced from grape seed using either potassium carbonate (K2CO3) or potassium hydroxide (KOH). The carbonization experiments were accomplished at 600 and 800 degrees C. The effects of the experimental ... -
Activated carbons from waste biomass by sulfuric acid activation and their use on methylene blue adsorption
(Elsevier Sci LTD, 2008)Preparation of the activated carbons from sunflower oil cake by sulphuric acid activation with different impregnation ratios was carried out. Laboratory prepared activated carbons were used as adsorbents for the removal ... -
Activated N-ras oncogene inhibits the expression of PDGF-BB receptor in myoblast cells
(Elsevier Sci Ireland LTD, 2001)…
