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A comparison of two methods used for determination of tritium concentration in urine samples by liquid scintillation counter

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Radiation Detection Technology and Methods 2018年第1期2卷 157-160页

作者： serdar Dizman Recep Keser Department of Physics Faculty of Sciences and ArtsRecep Tayyip Erdogan University53100 RizeTurkey

Background Tritium(3H)emits low-energy beta particles with a maximum energy of 18.6 *** scintillation counting technique(LSC)is mostly used for the detection and quantification of low-energy emitters like *** most widely used method to determine the level of tritium in humans is testing *** In this study,tritium activity concentrations in urine samples taken from 20 adults were *** ages range from 23 to *** of them are female,and others are *** tritium activity concentrations in urine samples were determined with two different ***,two standard samples were used to compare urine *** The efficiency values were found with two different methods(26.07%for the first method and 26.14%for the second method).According to the comparison results,the tritium concentration differences between these methods were found in a negligible level for urine samples and in an acceptable level for standard *** The tritium activity concentrations in urine and standard samples were calculated using two different *** to the comparison results,these two methods can be used for determination of tritium concentrations in urine samples.

关键词： Comparison Liquid scintillation counter Tritium Urine

Speech and language therapy for aphasia following subacute stroke

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Neural Regeneration Research 2016年第10期11卷 1591-1594页

作者： Engin Koyuncu Pinar Cam Nermin Altinok Duygu ekinci Calli Tuba Yarbay Duman Nese Ozgirgin Department of Physical Medicine and Rehabilitation Ankara Physical Medicine and Rehabilitation Training and Research Hospital Ankara Turkey Department of Psychology Ankara Physical Medicine and Rehabilitation Training and Research Hospital Ankara Turkey Department of Linguistics Amsterdam Center for Language and Communication Amsterdam Brain and Cognition Center University ofAmsterdam Amsterdam The Netherlands

The aim of this study was to investigate the time window, duration and intensity of optimal speech and language therapy applied to aphasic patients with subacute stroke in our hospital. The study consisted of 33 patients being hospitalized for stroke rehabilitation in our hospital with first stroke but without previous history of speech and language therapy. Sixteen sessions of impairment-based speech and language therapy were applied to the patients, 30-60 minutes per day, 2 days a week, for 8 successive weeks. Aphasia assess- ment in stroke patients was performed with Giilhane Aphasia Test-2 before and after treatment. Compared with before treatment, fluency of speech, listening comprehension, reading comprehension, oral motor evaluation, automatic speech, repetition and naming were improved after treatment. This suggests that 16 seesions of speech and language therapy, 30-60 minutes per day, 2 days a week, for 8 successive weeks, are effective in the treatment of aphasic patients with subacute stroke.

关键词： nerve regeneration stroke aphasia speech and language therapy disability rehabilitation GiilhaneAphasia Test-2 neural regeneration

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Production, characterization, and luminescent properties of Eu3+ doped yttrium niobate-tantalate films

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Journal of Advanced Ceramics 2017年第1期6卷 33-42页

作者： serdar YILDIRIM Selim DEMIRCI Kadriye ERTEKIN Erdal CELIK Zumre Arican ALICIKUS The Graduate School of Natural and Applied Sciences Dokuz Eylul University Buca 35390 Izmir Turkey Center for Fabrication and Applications of Electronic Materials(EMUM) Dokuz Eylul University Buca 35390 Izmir Turkey Department of Metallurgical and Materials Engineering Marmara University Goztepe Campus 34722 Istanbul Turkey Department of Chemistry Faculty of Science Dokuz Eylul University Buca 35390 Izmir Turkey Center for Fabrication and Applications of Electronic Materials(EMUM) Dokuz Eylul University Buca 35390 Izmir Turkey Department of Metallurgical and Materials Engineering Dokuz Eylul University Buca 35390 Izmir Turkey Department of Radiation Oncology Dokuz Eylul University Balcova 35340 Izmir Turkey

Monoclinic yttrium tantalate (M′-YTaO4, M′-YTO), and two different kinds of yttrium niobium-tantalate (M′-YTa0.85Nb0.15O4 (M′-YTNO) and Eu3+ doped M′-YTa0.85Nb0.15O4 (M′-YTNO:Eu3+)) were produced by sol–gel method and grown on single crystalline Si (100) substrate by spin coating approach. Structural properties and thermal behaviours of the films were characterized by means of X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), and thermogravimetry and differential thermal analysis (TG–DTA). Systematic Steady-state photoluminescence and lifetime measurements in a series of yttrium niobium-tantalate with varying amounts of Eu3+ were presented. The photoluminescence spectra of the films exhibited strong blue (380–400 nm) and red (614 nm) emissions upon ultraviolet excitation. Emission intensities were strongly dependent on the host lattice composition and film morphology. 1.5% Eu3+ doped films exhibited the brightest luminescence and long lifetime extending to 1.22 ms when excited at 254 nm. To the best of our knowledge, this is the first attempt in the production of M′-YTO, M′-YTNO, and M′-YTNO:Eu3+ films on single crystalline Si (100) substrate via sol–gel spin coating.

关键词： yttrium tantalate sol–gel photoluminescence lifetime Eu doped

Single-mode quasi PT-symmetric laser with high power emission

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Light(Science & Applications) 2023年第7期12卷 1346-1353页

作者： Enes Seker Babak Olyaeefaro Khalil Dadashi serdar Sengu Mohammad Hosain Teimourpour Ramy El-Ganainy Abdullah Demir UNAM-Institute of Materials Science and Nanotechnology Bilkent UniversityAnkara 06800Turkey Department of Physics Michigan Technological UniversityHoughtonMI 49931USA Henes Center for Quantum Phenomena Michigan Technological UniversityHoughtonMI 49931USA

Large-area lasers are practical for generating high output ***,this often comes at the expense of lower beam quality due to the introduction of higher-order ***,we experimentally demonstrate a new type of electrically pumped,large-area edge-emitting lasers that exhibit a high power emission(~0.4 W)and a high-quality beam(M^(2)~1.25).These favorable operational characteristics are enabled by establishing a quasi PT-symmetry between the second-order mode of a large area two-mode laser cavity and that of a single-mode auxiliary partner cavity,i.e.,by implementing a partial isospectrality between the two coupled *** in turn enlarges the effective volume of the higher-order *** a result,a selective pump applied via current injection into the main laser cavity can provide a stronger modal gain to the fundamental mode,and thus lead to lasing in the single mode regime after filtering out higher order transverse *** reported experimental results confirm this intuitive picture and are in good agreement with both theoretical and numerical *** all,the employed material platform and fabrication process are compatible with the industrial standards of semiconductor *** work provides the frst clear demonstration,beyond previous proof-of-concept studies,of the utility of PT-symmetry in building laser geometries with enhanced performance and,at the same time,useful output power levels and emission Cndidclerisuics.

关键词： power pumped pump

Candidate Eclipsing Binary Systems with a δ Scuti Star in Northern TESS Field

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Research in Astronomy and Astrophysics 2022年第8期22卷 36-50页

作者： F.Kahraman Ali?avu? D.Gümü? ?.K?rm?z?ta? ?.ekinci S.?avu? Y.T.Kaya F.Ali?avu? ?anakkale Onsekiz Mart University Faculty of Sciences and Arts Physics Department ?anakkale Onsekiz Mart University Astrophysics Research Center and Ulupnar Observatory Istanbul University Institute of Graduate Studies in Science Programme of Astronomy and Space Sciences ?anakkale Onsekiz Mart University School of Graduate Studies Department of Physics ?anakkale Onsekiz Mart University School of Graduate Studies Department of Space Sciences and Technologies ?anakkale Onsekiz Mart University Faculty of Engineering Computer Engineering

The existence of pulsating stars in eclipsing binaries has been known for decades. These types of objects are extremely valuable systems for astronomical studies as they exhibit both eclipse and pulsation variations. The eclipsing binaries are the only way to directly measure the mass and radius of stars with a good accuracy(≤1%),while the pulsations are a unique way to probe the stellar interior via oscillation frequencies. There are different types of pulsating stars existing in eclipsing binaries. One of them is the δ Scuti variables. Currently, the known number of δ Scuti stars in eclipsing binaries is around 90 according to the latest catalog of these variables. An increasing number of these kinds of variables is important to understand the stellar structure, evolution and the effect of binarity on the pulsations. Therefore, in this study, we focus on discovering new eclipsing binaries with δ Scuti component(s). We searched within the northern Transiting Exoplanet Survey Satellite(TESS) field with a visual inspection by following some criteria such as light curve shape, the existence of pulsation like variations in the out-of-eclipse light curve and the Teffvalues of the targets. As a result of these criteria, we discovered some targets. The orbital variations were first removed from the TESS light curves and frequency analysis was performed on the residuals. The luminosity, and absolute and bolometric magnitudes of the targets were calculated as well. To find how much of these parameters represent the primary(more luminous) binary component, we also computed the flux density ratio of the systems by utilizing the area of the eclipses. In addition, the positions of the systems in the H-R diagram were examined considering the flux density ratios. As a consequence of the investigation, we defined 38 candidate δ Scuti stars and also one Maia variable in eclipsing binary systems.

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Retroperitoneal laparoscopic nondismembered pyeloplasty for uretero-pelvic junction obstruction due to crossing vessels: A matched-paired analysis and review of literature

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Asian Journal of Urology 2018年第3期5卷 172-181页

作者： Jens Rassweiler Jan Klein Ali serdar Goezen Department of Urology and Pediatric Urology SLK Kliniken HeilbronnUniversity of HeidelbergHeibronnGermany Department of Urology Medical School UlmUniversity of UlmUlmGermany

Objective:To compare laparoscopic Anderson-Hynes pyeloplasty(LAHP)and retroperitoneal laparoscopic YV-pyeloplasty(LRYVP)in ureteropelvic junction obstruction(UPJ)in presence of a crossing vessels(CV).Methods:Our database showed 380 UPJO-cases,who underwent laparoscopic retroperitoneal surgery during the last 2 decades including 206 non-dismembered LRYVP,157 dismembered pyeloplasties LAHP,and 17 cases of laparoscopic *** them 198 cases were suitable for a matched-pair(2:1)analysis comparing laparoscopic retroperitoneal non-dismembered LRYVP(Group 1,n Z 131)and dismembered LAHP(Group 2,n Z 67)in presence of a crossing *** were matched according to age,gender,kidney functions,and obstruction *** were graded according to modified ***:Comparative data were similar between both groups(LRYVP ***)including mean operating time(112 min vs.114 min),complication rates(4.2%vs.7.3%)mainly Grade 1e2 according to Clavien classification,and success rates(90%vs.89%).These results reflected in the reviewed literature indicate that LRYVP provides the advantage of minimal dissection in case of CV with similar ***,redundant pelvis and anteriorly crossing vessels still require a dismembered pyeloplasty ***:LRYVP has achieved similar results compared with the previous golden standard of open surgery,especially in case of crossing vessels apart from presence of a redundant pelvis or anteriorly crossing *** can be further improved when using the small access retroperitoneoscopic technique respectively mini-laparoscopy.

关键词： Kidney pelvis Laparoscopy Ureteropelvic junction obstruction Mini-laparoscopy Crossing vessel

Structural,Morphological and Optical Properties of Well-Ordered CdO Nanostructures Synthesized by Easy-Economical Chemical Bath Deposition Technique

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光谱学与光谱分析 2016年第6期36卷 1998-2000页

作者： Sibel Morkoc Karadeniz Tuba Kιlιnc Burcu Bozkurt Cιrak Tuba Irmak Sakaoglu Cagrι Cιrak Mehmet Ertugrul Ali Ercan ekinci Department of Physics Art & Sciences Faculty Erzinean University 24100 Erzincan Turkey Department of Alternative Energy Sources Vocational School Erzincan University 24000 Erzincan Turkey Department of Electrical and Electronics Engineering Atattirk University 25040 Erzurum Turkey

In this Study,Cadmium Oxide(CdO)nanostructures were synthesized by using Chemical Bath Deposition *** synthesized process was carried out at room *** structural and optical properties of nanostructures was characterized by XRD,SEM and UV-Vis *** a result,the CdO nanostructures are oriented along(111)plane of cubic crystal *** morphology of CdO nanostructures showed interconnected prism-like and cauliflower-type cluster *** UV results of this structures with high absorbtion coefficient are observed to be in accordance with the CdO nanoparticles.

关键词： Chemical bath deposition CdO Nanostructures

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以天然沥青岩为原料制备高压缩强度的泡沫炭(英文)

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新型炭材料 2013年第2期28卷 127-133页

作者： Deniz Baran Mehmet Ferhat Yardim Hüsnü Atakül Ekrem ekinci AKSA Denizcah Koyu Yalova Turkey lstanbu Technical University Maslak 34469 Istanbul Turkey Tdinamik Energy Industry & Foreign Trade Co. Bulgurlu Uskudar 34696 lstanbul Turkey

以安纳托利亚东南部的天然沥青岩为原料制备泡沫炭。所制泡沫炭的平均孔径和密度分别为150μm和800 kg/m3。主要研究了压力、温度、泄压时间及在最高温度时的停留时间对泡沫形成的影响,同时还评价了炭化过程对泡沫结构的影响。主要研究... 详细信息

以安纳托利亚东南部的天然沥青岩为原料制备泡沫炭。所制泡沫炭的平均孔径和密度分别为150μm和800 kg/m3。主要研究了压力、温度、泄压时间及在最高温度时的停留时间对泡沫形成的影响,同时还评价了炭化过程对泡沫结构的影响。主要研究了压力、温度、泄压时间及在最高温度时的停留时间对泡沫炭进行了表征,并进行了密度及抗压强度分析。结果表明,1 323 K炭化后,泡沫炭压缩强度由10 MPa增加到18.7 MPa。沥青的灰分含量(41.76%)对泡沫炭的密度和压缩强度起重要作用。

关键词：泡沫炭沥青岩压缩强度

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Associations between Vaspin Levels and Coronary Artery Disease

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Cardiovascular Innovations and Applications 2020年第1期4卷 211-216页

作者： Lutfu Askin Okan Tanriverdi Hakan Tibilli serdar Turkmen Department of Cardiology Adiyaman Education and Research HospitalAdiyamanTurkey

The relationship between serum vaspin levels and metabolic or coronary artery disease is currently of interest for *** adipokine concentrations have been shown to be increased signifi cantly in atherosclerotic lesions,the role adipokines in the atherosclerotic process remains to be *** is a new biological marker associated with obesity and impaired insulin *** vaspin concentration has been shown to correlate with the severity of coronary artery *** infl ammation triggered by vaspin inhibits atherogenesis by suppressing macrophage foam cell formation and vascular smooth muscle cell migration and *** also contributes to plaque stabilization by increasing collagen content and reducing the intraplaque macrophage to vascular smooth muscle cell *** therapeutic goal concerning vaspin is to fi ght atherosclerosis and related diseases,as well as to maintain vascular health.

关键词： adipokine atherosclerosis infl ammation coronary artery disease vaspin