Yazar "Çakır, Ümit" için listeleme

The association constant of macrocyclic ether-cation interactions in 1,4-dioxane/water mixtures. III - Effect of temperature on the binding

Erk, Çakıl; Çakır, Ümit; Çiçek, Baki (Wiley-V C H Verlag Gmbh, 1999)

The association constant, K-a, of Na+ with [12] crown-4, [15]crown-5 and [18]crown-6 crown ethers were determined in a binary mixture, 1,4-dioxane/water (50/50) using a Na+ ion selective electrode at different temperatures. ...

The association constants of macrocyclic ether-cation interactions in dioxane/water mixtures, part II

Çakır, Ümit; Çiçek, Baki; Erk, Christine (Springer, 1998)

The association constants of Na+ with the macrocycles of [12]crown-4, [15]crown-5, [18]crown-6, Diaza[18]crown-6 and PEG 600 were estimated in dioxane /water (50/50) using a Na2+ ion selective electrode with the relationship, ...

The associations of macrocyclic ethers with cations in 1,4-dioxane/water mixtures; potentiometric Na+ and K+ binding measurements and computational study

Çiçek, Baki; Çakır, Ümit; Azizoğlu, Akın (Springer, 2012)

This paper deals with the study of different degrees of association constants of Na+ and K+ ions with macrocycles of [12]crown-4, [15]crown-5, [18]crown-6, and Diaza[18]crown-6 in (1:1)dioxane/water mixture using the sodium ...

Bazı aldehit ve kumarin bileşiklerinin değişik amino türevleri ile reaksiyonları

Palabıyık, Arzu Gümüş (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2011)

Çalışmamızın ilk aşamasında 2-hidroksibenzaldehit, 3-hidroksibenzaldehit, 4-hidroksibenzaldehit, tereftalaldehit ve 1,2-bis(4-(dimetilamino)fenil)etan-1,2-dion bileşiklerinin R-(-)-2-amino-1-bütanol ile reaksiyonlarından ...

Bazı makrohalkalı eterlerin sentezi ve kompleksleşme sabitlerinin incelenmesi

Uğraş, Halil İbrahim (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2000)

Tezimizde 15-24 üyeli halkalara sahip halkalı crown eterlerin bazıları (Dibenzo-18-Crown-6, Dibenzo-24-Crown-8, Dinafto-18-Cr-6, Dinafto-24-Cr-8) sentezlenip % 80 dioksan-su ikili karışımlı çözelti ortamlarında NaCl, NaClCU, ...

Bazı organik bileşik türevlerinden langmuir-blodgett fimlerinin üretimi ve karakterizasyonu

Akbay, Yusuf (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2017)

Bu çalışmada, farklı başlangıç materyalleri kullanılarak çeşitli alkil zincirleri olan bazı yeni organik türevler, azot atmosferi altında Mannich reaksiyonu, Williamson eter sentezi ve imin sentezi yöntemleri kullanılarak ...

Bazı sülfonamid türevlerinin sentezi ve karakterizasyonu

Karadeniz, Şeref (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2015)

Sülfonamid türü bileşikler 50 yılı aşkın bir süredir bir çok alanda ilaç olarak kullanılmaktadır. Kumarin (2H-1-benzopiran-2-on) ve turevleri doğada yaygın olarak bulunurlar. Kumarinlerin birçok doğal ve sentetik türevleri ...

Bazı yeni aza coronandların sentezi ve yapı karakterizasyonu

Uğraş, Halil İbrahim (Balıkesir Üniversitesi Fen Bilimleri Enstitüsü, 2003)

Günümüze kadar çeşitli araştırmacılar tarafından çok sayıda, değişik özellikler taşıyan aza-taç eter bileşikleri sentezlenmiştir. Günümüzdeki kullanıcıların başlıca hedefi bu önemli aza-taç eterleri yeni, kısa ve daha ucuz ...

Complexation and mutagenicity potential studies with N,N '-bis(2-hydroxynaphthalin-1-carbaldehydene)-1,2-bis-(P-aminophenoxy)ethane and a novel oxovanadium(IV) complex

Temel, Hamdi; Çakır, Ümit; Tolan, Veysel; Otludil, Birgül; Uğraş, Halil İbrahim (Taylor & Francis Ltd, 2004)

A new oxovanadium(IV) complex of the Schiff base obtained by condensation of 1,2-bis(p-aminophenoxy)ethane with 2-hydroxynaphthalin-1-carbaldehyde was synthesized. The complex was characterized by elemental analysis, ...

Complexation studies of N,N '-ethylene-bis(salicylideneimine)-cation complexation behavior in dioxane-water mixtures by conductometric studies

Temel, Hamdi; Çakır, Ümit; Uğraş, Halil İbrahim (Maik Nauka/Interperiodica/Springer, 2006)

The tetradentate-ligand Schiff base derived from salicylaldehyde and 1,2-diaminoethane has been synthesized. The stability constants and thermodynamic values for the complexation between ZnCl2, Cu(NO3)(2), and AgNO3 salts ...

Complexation studies of some newly synthesized precursors for substituted dibenzo and dibenzodiaza crown ethers

Çakır, Ümit; Uğraş, Halil İbrahim; Temel, Hamdi; Topal, Giray (John Wiley & Sons Inc, 2004)

This study represents the synthesis of dibenzo and dibenzodiaza crown ether precursors with various functional groups in good yield by employing four different methods using polar protic and aprotic solvents with high ...

Copper extraction from aqueous solution by pentaerythrityl tetrabenzylamine

Kara, Derya; Alkan, Mahir; Çakır, Ümit (2001)

The extraction of copper(II) from the aqueous phase with pentaerythrityl tetrabenzylamine (PETBA), which was synthesized from pentaerythrityl tetrabromide and benzyl amine, was studied. The influences of ionic strength, ...

Effects of some adsorbents on the pre-purification of taxol (anticancer drug) from hazelnut nutshells

Oğuzkan, Sibel Bayıl; Karadeniz, Şeref; Karagül, Bora; Uzun, Ayşe; Aksoy, Elif Sine; Güler, Özen Özensoy; Çakır, Ümit; Ugraş, Halil İbrahim (Asian Network Scientific Information-Ansinet, 2018)

Background and Objective: The most important pharmaceutically active substance in plant-derived chemotherapy drugs is paclitaxel. Taxane compounds such as paclitaxel, cephalomannine, baccatin III and 10-Deacetylbaccatin ...

Electrokinetic properties of perlite

Doğan, Mehmet; Alkan, Mahir; Çakır, Ümit (Academic Press Inc Jnl-Comp Subscriptions, 1997)

Electrokinetic properties of expanded and unexpanded perlite samples have been investigated using the microelectrophoresis technique. Perlite samples yield practically no isoelectric point in the pH range of 3 to II. Both ...

Estimation of association constants of macrocyclic ethers by potentiometry. Part V. Na+ binding in dioxane/water (80/20)

Çakır, Ümit; Uğraş, Halil İbrahim; Erk, Çakıl (Taylor & Francis Ltd, 2004)

The various association constants, beta(nm) and K-nm, of NaCl and NaClO4 with [12]crown-4, [15]crown-5, [18]crown-6, benzo[15]crown-5, benzo[12]crown-4, dibenzo[18]crown-6 and dinaphtho[18]crown-6 have been estimated in a ...

Estimation of Li+, K+ and Ca2+ complexation with [12]crown-4, [15] crown-5 and [18]crown-6 using a Na+ISE in dioxane-water, part IV - Cation equilibrium constants of macrocyclic ethers with ion selective electrodes

Erk, Çakıl; Çakır, Ümit; Çiçek, Baki (Springer-Verlag Wien, 1999)

The (1:1) Na+ equilibrium constants, K-e1, of macrocyclic ethers of [12]crown-4, [12]crown-5 and [18]crown-6 were determined with a Na+ ISE in the presence of a second cation e.g. Li+, K+ and Ca2+ in dioxane/water (50/50). ...

Experimental, theoretical and biological activity study on the acyl-substituted benzo-18-crown-6, dibenzo-18-crown-6 and dibenzo-24-crown-8

Uğraş, Halil İbrahim; Çakır, Ümit; Azizoğlu, Akın; Kılıç, Turgut; Erk, Çakıl (Springer, 2006)

Hexadecanoyl, dihexadecanoyl, dioctadecaneoyl, di-10-undecenoyl, and dicis-9-octadecenoyl derivatives of benzo[18]crown-6, dibenzo[18]crown-6 and dibenzo[24]-8 were synthesized by the condensation of carboxylic acids ...