Ara
Toplam kayıt 200, listelenen: 31-40
Design and synthesis of some piperazine hybrid molecules
(Editura Acad Romane, 2017)
In this work, a new series of piperazine hybrid molecules containing coumarin, isatin, salicyl, furane and 1,2,4-triazol-3-thiol moieties was synthesized in good yields. 2-[4-(4-Nitrophenyl)piperazin-1-yl] acetohydrazide ...
Zircon Lu-Hf isotope systematics and U-Pb geochronology, whole-rock Sr-Nd isotopes and geochemistry of the early Jurassic Gokcedere pluton, Sakarya Zone-NE Turkey: a magmatic response to roll-back of the Paleo-Tethyan oceanic lithosphere
(Springer, 2017)
The early Mesozoic was a critical era for the geodynamic evolution of the Sakarya Zone as transition from accretion to collision events in the region. However, its complex evolutionary history is still debated. To address ...
Solvent free utilization and selective coupling of epichlorohydrin with carbon dioxide over zirconium metal-organic frameworks
(Elsevier Science Bv, 2017)
Ui0 type zirconium metal-organic frameworks (MOFs) have been successfully applied to the synthesis of cyclic carbonates from CO2 and epoxides without using any solvent. All prepared MOFs are good catalysts for the cycloaddition ...
Effect of ProTaper Gold, self-adjusting file, and XP-endo shaper instruments on dentinal microcrack formation: A micro-computed tomographic study
(Elsevier Science Inc, 2017)
Introduction: the aim of the present study was to evaluate the frequency of dentinal microcracks observed after root canal preparation with ProTaper Universal (PTU; Dentsply Tulsa Dental Specialties, Tulsa, OK), ProTaper ...
The effect of veneering on the marginal fit of CAD/CAM-generated, copy-milled, and cast metal copings
(Springer Heidelberg, 2017)
This in vitro study investigated the marginal fit of metal and zirconia copings before and after veneering on dies with shoulder/chamfer (s/c) finish lines. Using CAD/CAM, ten (n = 10) each s/c zirconia (NZ) copings and ...
Stress of life at the ocean's surface: Latitudinal patterns of UV sunscreens in plankton across the Atlantic
(Pergamon-Elsevier Science Ltd, 2017)
The near-surface layer of the ocean is a habitat in which plankton are subjected to very different stresses to those in deeper layers. These include high turbulence and illumination, allowing increased visibility to ...
Synthesis and characterization of two new hydroxamic acids derivatives and their metal complexes. An investigation on the keto/enol, E/Z and hydroxamate/hydroxirnate forms
(Elsevier Science Bv, 2017)
2-phenylbenzimidazole-N-acetohydroxamic acid (HL1), 2-phenylbenzimidazole-N-butanohydroxamic acid (HL2) and Ni(II), Cu(II), Zn(II) and Cd(II) metal complexes have been synthesized and characterized by elemental analyses, ...
Determination of radioactivity levels and heavy metal concentrations in seawater, sediment and anchovy (Engraulis encrasicolus) from the Black Sea in Rize, Turkey
(Pergamon-Elsevier Science Ltd, 2017)
Seawater, sediment and fish (anchovy) samples consumed in the Rize province of the Eastern Black Sea region of Turkey were collected from five different stations. the radioactivity levels (Ra-226, Th-232. K-40 and Cs-137) ...
An equivalence relation based on the U-partial order
(Elsevier Science Inc, 2017)
In this paper, an equivalence relation on the class of uninorms induced by the U-partial order is discussed. Defining the set of all incomparable elements w.r.t. the U-partial order, this set is deeply investigated and ...
Strain-engineered SiGe nanomembrane quantum-well infrared photodetectors
(Ieee, 2017)
SiGe quantum-well nanomembranes, where stress from lattice mismatch is relaxed via elastic strain sharing rather than defect formation, are used to develop intersubband photodetectors showing improved performance compared ...