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Frictional Characteristics of Cotton-Modal Yarns

Demiryürek O., Kilic A.

Fibres & Textiles in Eastern Europe

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2018

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Vol. 26, no. 3 (129)

40--45

EN

In this study, structural or physical properties such as the unevenness, hairiness and frictional properties of cotton-modal blended yarns were studied. For this purpose, 100% cotton, 50/% cotton/modal and 100% modal ring spun yarns were produced in five different twist coefficients (αe: 3.5, 3.7, 4.0, 4.2, 4.5) and four different yarn linear densities (21, 25, 30 and 37 tex). General factorial design was used and the response surface was plotted for analysing the data. In conclusion, the most influential factors for the yarn characteristics were the yarn linear density and blend ratio. Contrary to expectations, the twist coefficient factor had a minor effect on yarn characteristics, especially on the friction coefficient.

PL

W pracy badano właściwości strukturalne i fizyczne, takie jak nierównomierność, włochatość i właściwości cierne przędz bawełnianych. W tym celu wytworzono przędze obrączkowe o różnym stosunku mieszanki: 100% bawełna; 50% bawełna/50% modal i 100% modal z pięcioma różnymi współczynnikami skrętu (αe: 3,5; 3,7; 4,0; 4,2; 4,5) i czterema różnymi masami liniowymi (21, 25, 30 i 37 tex). Dokonano charakterystyki tarciowej poszczególnych przędz. Stwierdzono, że czynnikami mającymi największy wpływ na charakterystykę tarciową były masa liniowa i stosunek mieszanki przędzy. Wbrew oczekiwaniom współczynnik skrętu miał niewielki wpływ na charakterystykę tarciową przędzy, a zwłaszcza na współczynnik tarcia.

2

Recovery of trace elements with uranium and thorium from yatagan thermal power plant fly ashes by leaching

Kursun I., Ozkan S. G., Kilic A., Terzi M., Enkhtaivan N.

Physicochemical Problems of Mineral Processing

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2016

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Vol. 52, iss. 2

588--596

EN

In this paper, characterization of fly ashes obtained from the Yatagan Thermal Power plant, Mugla, Turkey was performed in order to determine their radioactive element contents, especially uranium and thorium. The representative fly ash samples were subjected to hydrochloric acid (HCl) leaching considering solid concentration, acid dosage, leaching time and temperature in order to reach certain uranium and thorium recoveries. The obtained results showed that the optimum conditions for leaching tests were: 30% solid concentration, 2.36 mmol/dm3 HCl addition, 240 min leaching time and 40 oC temperature. Dissolution efficiencies for uranium and thorium from the Yatagan Thermal Power Plant fly ashes were calculated as 90.12 and 81.18%, respectively.

3

Coordination Chemistry of Nickel(II), Copper(II), Two Novel vic-Dioximes Ligands. Synthesis, Spectroscopy and Redox Properties

Kilic A., Tas E., Gumgum B., Yilmaz I.

Polish Journal of Chemistry

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2006

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Vol. 80, nr 12

1967-1981

EN

Two new vic-dioxime, N-(4-amino-1-benzyl piperidine)-anti-phenylglyoxime (L1H2) and N-(4-amino-1-benzyl piperidine)-anti-glyoxime (L2H2) were prepared by the reaction of anti-phenylchloroglyoxime and anti-monochloroglyoxime with 4-amino- 1-benzyl piperidine in absolute THF at -15°C. Mononuclear nickel(II), copper(II), and cobalt(II) complexes have a metal-ligand ratio of 1:2 in which the ligands coordinate through the two nitrogen atoms as do most vic-dioximes. The ligands and their Co(II), Cu(II), and Ni(II) complexes were characterized by elemental analyses, FT-IR, UV-vis, 1H-NMR and 13C-NMR, magnetic susceptibility measurements, electrical conductivity measurements and cyclic voltammetry. The electrical conductivity of Ni(II), Co(II), and Cu(II) metal complexes were measured using Four-Point Probe analysis. The electrochemical behavior of theNi(II), Co(II), andCu(II) complexeswere investigated by cyclic

4

Coordination Chemistry of Nickel(II), Copper(II), and Cobalt(II) with MN4 Core-Containing Two Novel vic-Dioximes Ligands. Synthesis, Spectroscopy and Redox Properties

Kilic A., Tas E., Gumgum B., Yilmaz I.

Polish Journal of Chemistry

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2006

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Vol. 80, nr 12

1967-1981

EN

Two new vic-dioxime, N-(4-amino-1-benzyl piperidine)-anti-phenylglyoxime (L1H2) and N-(4-amino-1-benzyl piperidine)-anti-glyoxime (L2H2) were prepared by the reaction of anti-phenylchloroglyoxime and anti-monochloroglyoxime with 4-amino- 1-benzyl piperidine in absolute THF at –15°C. Mononuclear nickel(II), copper(II), and cobalt(II) complexes have a metal-ligand ratio of 1:2 in which the ligands coordinate through the two nitrogen atoms as do most vic-dioximes. The ligands and their Co(II), Cu(II), and Ni(II) complexes were characterized by elemental analyses, FT-IR, UV-vis, 1H-NMR and 13C-NMR, magnetic susceptibility measurements, electrical conductivity measurements and cyclic voltammetry. The electrical conductivity of Ni(II), Co(II), and Cu(II) metal complexes were measured using Four-Point Probe analysis. The electrochemical behavior of theNi(II), Co(II), andCu(II) complexeswere investigated by cyclic voltammetry in DMSO.

5

Synthesis, Characterization and Redox Properties of Novel vic-Dioximes and Their Complexes with Nickel(ii), Copper(II) and Cobalt(II)

Tas E., Aslanoglu M., Kilic A., Ulusoy M ., Guler M.

Polish Journal of Chemistry

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2005

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Vol. 79 / nr 11

1739-1747

EN

Two novel vic-dioxime, 1,2-dihydroxyimino-1-p-tolyl-3-aza-6-imidazole heptane (L1H2) and N-(ethyl-4-amino-1-piperidine carboxylate)-p-tolylglyoxime (L2H2) were prepared by the reaction of anti-p-tolylchloroglyoxime with 1-(3-aminopropyl)imidazole and ethyl-4-amino-1-piperidine carboxylate in absolute THF. Mononuclear complexes with a metal-ligand ratio of 1:2 were prepared using Co(II), Cu(II) and Ni(II) salts. The ligands and their Co(II), Cu(II) and Ni(II) com plexes were characterized by elemental analyses, FT-IR, UV-Vis, 1H-NMR and 13C-NMR and magnetic susceptibility measurements. The electrochemical behaviour of the complexes was investi ated by cyclic voltammetry in dimethylsulfoxide. All metal complexes showed metal centered quasi reversible one-electron redox processes. How ever, metal complexes of the L2H2 ligand also ex hibited ligand based irreversible redox waves.