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Chinese Journal of Polymer Science 2009年第4期27卷 465-477页

作者： smet Kaya aysel aydin Department of Chemistry Faculty of Science and ArtsCanakkale Onsekiz Mart UniversityTR-17020CanakkaleTurkey

The optimum reaction conditions of the oxidative polycondensation of 2-(thien-2-yl-methylene)aminophenol (2-TMAP) has been accomplished by using air O_2,H_2O_2 and NaOCl oxidants in an aqueous alkaline medium between 20℃and 90℃.The structures of the monomer and oligomer were confirmed by FT-IR,UV-Vis,~1H-NMR and ^(13)C-NMR and elemental ***-DTA,size exclusion chromatography(SEC) techniques and solubility tests were applied for *** ~1H-NMR and ^(13)C-NMR data show that the polymeriz...

关键词： Air O_2 NaOCl O1igo[2-(thien-2-yl-methylene)aminophenol] Oxidative polycondensation Thermal analysis Electrical conductivity Oligomer-metal complex compounds

Comparative evaluation of boron distribution from ulexite,colemanite and DOT rods in Scots pine wood

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Journal of Forestry Research 2021年第1期32卷 419-426页

作者： Saip Nami Kartal Evren Terzi aysel Kanturk Figen Melek Cordan Secil aydin Sabriye Piskin Department of Forest Biology and Wood Protection Technology Faculty of Forestry Istanbul University-Cerrahpasa34473 BahcekoyIstanbulTurkey Department of Chemical Engineering Faculty of Chemistry-MetallurgicalYıldız Technical University34210 Davutpasa EsenlerIstanbulTurkey

This study evaluated boron diff usion from rods made of raw boron minerals,ulexite and colemanite with low water solubility,in comparison with di-sodium octaborate tetrahydrate(DOT).Scots pine(Pinus sylvestris L.)sapwood and heartwood blocks were conditioned to target moisture contents of 30%,60%,and 90%.The rods were inserted into the blocks through treatment holes and boron diff usion was observed at three assay zones across the blocks after 7,30,60 and 90-day-incubation at room *** glycol was also inserted into the holes to improve boron diff *** levels increased with increased wood moisture *** some exceptions,boron in the assay zones did not tend to follow consistent amount gradients with distance from the treatment *** levels from ulexite rods were higher than those from colemanite rods,with DOT rods with the highest diff usion rates as a result of higher water solubility of DOT than ulexite and *** results suggest that ulexite-based rods may be useful inthe presence of ethylene glycol in sapwood when wood is at high moisture content for extended periods.

关键词： Boron rods Remedial Ulexite Colemanite Distribution DOT

Characterization and modification of waste magnesium chip utilized as an Mg-rich intermetallic composite

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Particuology 2014年第6期12卷 158-164页

作者： aysel Kantürk Figen Sabriye Piskin Department of Chemical Engineering Yildiz Technical University

In this study,the characterization and modification of waste magnesium chips（WMCs）,which were produced by plastic molding in a gold manufacturing factory and are used as Mg-rich intermetallic composites in storing hydrogen,were discussed in *** were analyzed using X-ray diffraction（XRD）,X-ray fluorescence（XRF） spectroscopy,differential scanning calorimetry（DSC）,scanning electron microscopy（SEM）,and Brunauer-Emmett-Teller（BET） analysis to characterize the materials’ structural *** milling,organic treatment,and inorganic salt addition were carried out to modify the WMCs’ surface to prepare Mg-rich intermetallic composites for storing *** modified samples were analyzed using high-pressure volumetric analyses to calculate their hydrogen storage *** authors conclude that modified WMC was promising as an Mg-rich intermetallic composite that was suitable for use in hydrogen storage with a 4.59 wt%capacity at 320 C under a hydrogen pressure of 60 bar.

关键词： Waste magnesium chip Characterization Modification Hydrogen storage Intermetallic composite

Effects of Exogenous Indole Butyric Acid and Callus Formation on the Anti-oxidant Activity, Total Phenolic, and Anthocyanin Constituents of Mulberry Cuttings

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Journal of Integrative Plant Biology 2006年第7期48卷 832-837页

作者： aysel Sivaci Munevver Sokmen Department of Biology Sinop Science and Literature Faculty Ondokuz Mayis University Sinop Turkey Department of Chemistry Faculty of Science and Literature Cumhuriyet University Sivas Turkey

In order to evaluate the effects of exogenous indole butyric acid （IBA） and callus formation on the antioxidant activity, total phenolics, and anthocyanin constituents of Morus nigra L. and M. alba L. cuttings, we investigated the variations before and after the treatment. The results indicate that anti-oxidant ability, total phenolic, and anthocyanin constituents of the callus stems of both Morus species were higher than those of non-callus forming species. There were also increases observed in anti-oxidant ability, total phenolic, and anthocyanin constituents of calli treated with IBA （1 000-3 000 mg/L）.

关键词： anthocyanin anti-oxidant activity callus cutting indole butyric acid mulberry phenolics.

SYNTHESIS AND CHARACTERIZATION OF A NEW DYESTUFF POLYMER SOLUBLE IN ALKALINE AQUEOUS MEDIA

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Chinese Journal of Polymer Science 2013年第12期31卷 1632-1646页

作者： Ismet Kaya aysel Ayd n Kevser Temizkan Canakkale Onsekiz Mart University Faculty of Sciences and ArtsDepartment of ChemistryPolymer Synthesis and Analysis Laboratory

Novel dyestuff polymers were successfully obtained through oxidative polymerization technique. The synthesized Schiff base and its polymer were soluble in alkaline＇aqueous medium and they have various colors in different solutions. Also, it can be said that the synthesized compounds are suitable as coloring agent （dyestuff） for textile applications. Fluorescence properties of the compounds were determined in DMF with different concentrations （mg/L）. Poly-tris（4- aminophenyl）methanol （P-TAPM） has quite high emission and excitation intensity values. Optical and electrochemical band gaps of the polymers were lower than those of the monomers indicating the more conjugated structure of the polymers. The oxidized states of the novel dyestuff compounds were examined by cyclic voltammetry （CV） technique. The solid state conductivity measurements showed that the synthesized polymers were semiconductors when exposed to the iodine vapour their conductivities could be increased. P-TAPM had the highest undoped conductivity. Thermal characterizations of the synthesized compounds were carried out by TG-DTA and DSC methods.

关键词： Dyestuff polymers Thermal properties Fluorescence Oxidative polymerization.

A new record of the freshwater jellyfish Craspedacusta sowerbii Lankester,1880(Hydrozoa)in Southeastern Anatolia(Turkey)

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Chinese Journal of Oceanology and Limnology 2011年第2期29卷 366-368页

作者： aysel BEKLEYEN Memet VAROL Bulent GOKOT Department of Biology Faculty of ScienceUniversity of Dicle-21280 DiyarbakirTurkey Ministry of Agriculture and Rural Affairs Province Control Laboratory-21010 DiyarbakirTurkey

We report the first record of the invasive freshwater jellyfish Craspedacusta sowerbii Lankester in Kralklzl Dam Lake, Southeastern Anatolia, Turkey. The medusa was found only in August, 2008 when average surface wate... 详细信息

关键词： freshwater jellyfish medusae Craspedacusta sowerbii Kralklzl Dam Lake Turkey new record

Movement of boron from ulexite and colemanite minerals in sapwood and heartwood of Cryptomeria japonica

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Journal of Forestry Research 2020年第6期31卷 2597-2603页

作者： Saip Nami Kartal Evren Terzi aysel Kanturk Figen Tsuyoshi Yoshimura Department of Forest Biology and Wood Protection Technology Faculty of Forestry Istanbul University-Cerrahpaşa34473 BahcekoyIstanbulTurkey Department of Chemical Engineering Faculty of Chemistry-MetallurgicalYıldız Technical UniversityDavutpasa Esenler34210 IstanbulTurkey Laboratory of Innovative Humano-Habitability Research Institute for Sustainable Humanosphere(RISH)Kyoto UniversityUjiKyoto 611-0011Japan

This study evaluated boron diff usion from raw boron minerals ulexite and colemanite with low water solubility in comparison to disodium octaborate tetrahydrate(DOT).Tests were conducted using sugi(Cryptomeria japonica(L.)***)sapwood and heartwood blocks conditioned to 30,60,and 90%target moisture *** blocks were fi lled with the boron compounds through treatment holes and diff usion was observed at three assay zones across the blocks after 7,30,60 or 90-day incubation period at room *** comparison,ethylene glycol was also introduced into the holes to elevate boron diff *** expected,diff usion increased with increased moisture content and levels were higher at the 60%and 90%moisture levels compared to the 30%*** some exceptions,boron levels did not follow consistent gradients with distance away from the treatment *** of ethylene glycol helped increase boron levels,even in heartwood *** levels were higher from the ulexite source than from colemanite;however,DOT treatments resulted in the highest boron diff usion rates as a result of greater water solubility compared to both raw boron *** results suggest that ulexite together with ethylene glycol may be useful in both sapwood and heartwood materials when kept at high moisture levels for extended periods.

关键词： Boron Remedial Ulexite Colemanite DOT Distribution Sapwood Heartwood

Risk factors for childhood obesity: Do the birth weight, type of delivery, and mother's overweight have an implication on current weight status?

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World Journal of Pediatrics 2017年第5期13卷 457-464页

作者： aysel Vehapoglu Nilufer Goknar Ozden Turel Emel Torun Gamze Ozgurhan Department of Pediatrics Bezmialem Vak(i)f UniversityFaculty of MedicinelstanbulTurkey Department of Pediatrics Suleymaniye Obstetrics and Gynecology HospitallstanbulTurkey

Background:The aim of this study was to identify risk factors,including the type of delivery,breastfeeding and its duration,birth weight,the timing of solid food introduction,the mother's education level at birth,and smoking status during pregnancy,that are associated with obesity in children living in ***:This study involving 4990 healthy children aged 2-14 years,at an outpatient clinic in a tertiary care hospital from June 2012 to July ***:The overall rates of overweight and obesity in children were 13.1% and 7.8%,*** demonstrated that 44.5% of children were delivered by caesarean *** all age groups,7.8% of children delivered by caesarean section were obese compared with 7.9% of children born *** significant association between caesarean section delivery and obesity in childhood was found in our study [odds ratio (OR)=0.98,95% confidence interval (CI)=0.64-2.87,P=0.454].There was also no association between duration of breastfeeding and the introduction of solid foods before 4 months or after 6 months of age and childhood obesity (OR=0.95,95% CI=0.69-1.3,P=0.771;OR=0.99,95% CI=0.64-1.53,P=0.261).Regression analyses revealed that children with birth weights greater than 3801 g or those with maternal body mass index (BMI) equal to or greater than 30 had an increased risk of being obese or overweight (OR=1.78,95% CI=1.19-2.65;OR=3.95,95% CI=1.94-5.81).Conclusions:This study demonstrated that increased birth weight and maternal BMI are significant risk factors for obesity in children living in Istanbul,*** relation between caesarean section delivery and childhood obesity was found in this study.

关键词： birth weight breastfeeding caesarean section childhood obesity solid food introduction

Some Classes of Kenmotsu Manifolds with Respect to Semi-symmetric Metric Connection

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Acta Mathematica Sinica,English Series 2013年第7期29卷 1311-1322页

作者： D. G. PRAKASHA aysel TURGUT VANLI C. S. BAGEWADI D. A. PATIL Department of Mathematics Faculty of Sciences Karnatak University Department of Mathematics Faculty of Art and Sciences Gazi University Department of Mathematics Faculty of Science and Technology Kuvempu University Department of Mathematics Faculty of Basic Sciences B.V.B. College of Engineering and Technology

In this paper, we study conharmonic curvature tensor in Kenmotsu manifolds with respect to semi-symmetric metric connection and also characterize conharmonically flat, conharmonically semisymmetric and Ф-conharmonica... 详细信息

关键词： Kenmotsu manifolds conharmonic curvature tensor semi-symmetric metric connection

Ammonia borane-based reactive mixture for trapping and converting carbon dioxide

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Frontiers of Materials Science 2022年第2期16卷 71-81页

作者： Carlos A.CASTILLA-MARTINEZ Bilge COŞKUNER FİLİZ Eddy PETIT aysel KANTÜRK FİGEN Umit B.DEMIRCI Institut Europeen des Membranes(IEM) UMR 5635Univ MontpellierENSCMCNRSMontpellierFrance Department of Metallurgy and Materials Engineering Yildiz Technical UniversityİstanbulTurkey Department of Chemical Engineering Yildiz Technical UniversityİstanbulTurkey

Ammonia borane(NH_(3)BH_(3))is a reducing agent,able to trap and convert carbon *** the present work,we used a reactive solid consisting of a mixture of 90 wt.%of NH_(3)BH_(3)and 10 wt.%of palladium chloride,because the mixture reacts in a fast and exothermic way while releasing H2 and generating catalytic *** took advantage of such reactivity to trap and convert CO_(2)(7 bar),knowing besides that Pd0 is a CO_(2)hydrogenation *** operation(*** 1)was effective:BNH polymers,and B−O,C=O,C−O,and C−H bonds(like in BOCH_(3)and BOOCH groups)were *** then(in stage 2)pyrolyzed the as-obtained solid at 1250℃ and washed it with *** doing so,we isolated cyclotriboric acid H_(3)B3O6(stemming from B2O3 formed at 1250℃),hexagonal boron nitride,and graphitic *** conclusion,the stage 1 showed that CO_(2)can be‘trapped’and converted,resulting in the formation of BOCH_(3)and BOOCH groups(possible sources of methanol and formic acid),and the stage 2 showed that CO_(2)transforms into graphitic carbon.

关键词： ammonia borane boron nitride boron oxide carbon dioxide graphitic carbon