Ara
Toplam kayıt 1676, listelenen: 901-910
Synthesis of pyrrolo-pyrrolo-pyrazines via the Pd/C-catalyzed cyclization of N-propargyl pyrrolinyl-pyrrole derivatives
(Elsevier Ltd, 2019)
A novel and efficient synthesis of N-substituted dipyrrolo[1,2-a:2',1'-c]pyrazine derivatives has been developed. The synthetic strategy relies on the synthesisof 4',5'-dihydro-1H,3'H-2,2'-bipyrrole, followed by the reaction ...
Synthesis of a bipyridine-derived achiral thiourea trifluoromethanesulfonic acid salt and its application as an additive in organocatalytic asymmetric reactions
(2013)
The host-guest complex of a proline-thiourea bipyridine trifluoromethanesulfonic acid salt can catalyze organocatalytic asymmetric reactions such as aldol, Michael, and Mannich in polar protic medium with high stereoselectivities. ...
The dragomans of the Britain and the dragoman reform of 1758
(Turkish Historical Society, 2016)
The commerce is one of the oldest and most important topics of the international relations. When the merchants of the European nations wanted to trade in the Ottoman Empire, either their state had to have ahd-name ...
According to the Ottoman documents: British Consulate of Cyprus (1700-1800)
(Turkish Historical Society, 2017)
The commercial activities of the European nations were organised by the capitulation system. Having gained the ahd-name or capitulations from the Ottomans, the European nations set up their embassy in Istanbul and their ...
Ihtisab Rusumu of Cyprus After Organization in 1826 (1828-1838)
(2012)
The Ottoman Empire collected a lot of taxes throughout its long history. The ihtisab Rusumu levied after 1826 was one of them. This tax was paid mainly by the guilds. The aim of this tax was to support the new army called ...
High temperature wear behavior of the surface-modified externally cooled rolls
(Elsevier B.V., 2018)
Externally cooled rolls of a steel plant were coated using three different surface modification techniques, namely titanizing, boronizing and borotitanizing. The grown coatings were examined using optical microscopy, ...
Seasonal variation and occurrence of algal turf community in Lake Ladik, Turkey
(2013)
The composition and seasonal variation of the algal turf of Lake Ladik were studied using samples collected from one station between June 2000 and May 2001. 50 tax^jfJriatoms were identified in the epiphyton. Navicula ...
Sno2/graphene nanocomposites with enhanced gas sensing performance
(Trans Tech Publications Ltd, 2018)
Graphene-Tin Oxide (G-SnO2) nanocomposites in different morphology were synthesized using tin (II) chloride (SnCl2) and graphene Oxide (GO) via hydrothermal process in the presence of hydrazine and ammonia by adding ...
The effect of potassium modification on structural properties and catalytic activity of copper and iron containing SBA-16 catalysts for selective oxidation of ethanol
(Elsevier Ltd, 2019)
Copper and iron SBA-16 catalysts were synthesized using hydrothermal method and modified with potassium. XRD patterns showed that characteristic peaks of SBA-16 for all catalysts did not destroy with metal loading. The ...
Synthesis and characterization of modified diatomite-leaf-like cuO nanosheet composites
(Trans Tech Publications Ltd, 2018)
In this work, firstly we described the effect of freeze drying on modification of raw diatomite. And then, modified diatomite-leaf-like copper oxide (CuO) nanosheet composite was successfully prepared by surfactant-free ...