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沿岸物质搬运现场观测与模拟的比较

海洋地质动态 2002年第7期18卷 32-36页

作者： atilla bayram 郝德峰

Renal glucosuria in children

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World Journal of Clinical Pediatrics 2025年第1期14卷 46-54页

作者： Meral Torun bayram Salih Kavukcu Division of Nephrology Department of PediatricsDokuz Eylül UniversitySchool of MedicineInciralti-Balcova 35340IzmirTürkiye

The kidneys play a critical role in maintaining glucose *** normal renal tubular function,most of the glucose filtered from the glomeruli is re-absorbed in the proximal tubules,leaving only trace amounts in the *** can occur as a symptom of generalized proximal tubular dysfunction or when the reabsorption threshold is exceeded or the glucose threshold is reduced,as seen in familial renal glycosuria(FRG).FRG is characterized by persistent glycosuria despite normal blood glucose levels and tubular function and is primarily associated with mutations in the sodium/glucose cotransporter 5A2 gene,which encodes the sodium-glucose cotransporter(SGLT)*** SGLTs has been proposed as a novel treatment strategy for diabetes,and since FRG is often considered an asymptomatic and benign condition,it has inspired preclinical and clinical studies using SGLT2 inhibitors in type 2 ***,patients with FRG may exhibit clinical features such as lower body weight or height,altered systemic blood pressure,diaper dermatitis,amino-aciduria,decreased serum uric acid levels,and *** research is needed to fully understand the pathophysiology,molecular genetics,and clinical manifestations of renal glucosuria.

关键词： Sodium-glucose cotransporters Basolateral glucose transporters Familial renal glucosuria Intestinal glucose-galactose malabsorption Fanconi-Bickel syndrome Sodium-glucose cotransporter 2 inhibitors

An ultra-sensitive non-enzymatic hydrogen peroxide sensor based on SiO2-APTES supported Au nanoparticles modified glassy carbon electrode

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Progress in Natural Science:Materials International 2019年第4期29卷 390-396页

作者： Lutfullah bayram Muhammet Guler Institute of Science Van Yüzüncü Yil University Department of Chemistry Faculty of Science Van Yüzüncü Yil University

A novel electrochemical sensor based on(3-aminopropyl)triethoxysilane(APTES) functionalized Si02supported Au nanoparticles and Nafion(Nf) as the protective membrane was fabricated for the electrochemical determination of H2O2in contact lens-cleaning *** modification steps of glassy carbon working electrode(GCE) were evaluated by electrochemical impedance spectroscopy(EIS) and cyclic voltammetry(CV).The amperometric results showed that Nf/Au@Si02-APTES/GCE sensor can be used to determine H2O2in contact lens solutions with the linear ranges of 14-180 μM and 0.18-7.15 mM,excellent sensitivities of 2514.6 and894.2 μA mM cm-2,and a low limit of detection(LOD) of 4.25 μM depending upon signal-to-noise ratio of ***/Au@Si02-APTES/GCE exhibited excellent repeatability with relative standard deviation(RDS) of 2.66% and acceptable reproducibility with RSD of 3.35%.The sensor displayed reasonable selectivity in the presence of uric acid,dopamine,ascorbic acid,glucose,mannose,glycine,fructose,histidine,and arginine with RSD less than2.5%.The fabricated Nf/Au@Si02-APTES/GCE sensor has been successfully applied to detect H2O2in contact lens cleaning solutions.

关键词： Au nanoparticles (3-aminopropyl)triethoxysilane SiO2 Nafion Hydrogen peroxide Modified electrode

Kinetic Ising model in a time-dependent oscillating external magnetic field:effective-field theory

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Chinese Physics B 2010年第5期19卷 187-194页

作者： bayram Deviren Osman Canko Mustafa Keskin Institute of Science Erciyes University38039 KayseriTurkey Department of Physics Nevsehir University50300 NevsehirTurkey Department of Physics Erciyes University38039 KayseriTurkey

Recently, Shiet al. [2008 Phys. Left. A 372 5922] have studied the dynamical response of the kinetic Ising model in the presence of a sinusoidal oscillating field and presented the dynamic phase diagrams by using an effective-field theory （EFT） and a mean-field theory （MFT）. The MFT results are in conflict with those of the earlier work of Tome and de Oliveira, [1990 Phys. Rev. A 41 4251]. We calculate the dynamic phase diagrams and find that our results are similar to those of the earlier work of Tome and de Oliveira; hence the dynamic phase diagrams calculated by Shiet al. are incomplete within both theories, except the low values of frequencies for the MFT calculation. We also investigate the influence of external field frequency （w） and static external field amplitude （h0） for both MFT and EFT calculations. We find that the behaviour of the system strongly depends on the values of w and h0.

关键词： kinetic Ising model effective-field theory mean-field theory

Phase diagrams in mixed spin-3/2 and spin-2 Ising system with two alternative layers within the effective-field theory

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Chinese Physics B 2011年第6期20卷 112-124页

作者： bayram Deviren Yasin Polat Mustafa Keskin Department of Physics Nevsehir University Institute of Science Erciyes University Department of Physics Erciyes University

The phase diagrams in the mixed spin-3/2 and spin-2 Ising system with two alternative layers on a honeycomb lattice are investigated and discussed by the use of the effective-field theory with correlations. The interaction of the nearest-neighbour spins of each layer is taken to be positive （ferromagnetic interaction） and the interaction of the adjacent spins of the nearest-neighbour layers is considered to be either positive or negative （ferromagnetic or antiferromagnetic interaction）. The temperature dependence of the layer magnetizations of the system is examined to characterize the nature （continuous or discontinuous） of the phase transitions and obtain the phase transition temperatures. The system exhibits both second- and first-order phase transitions besides triple point （TP）, critical end point （E）, multicritical point （A）, isolated critical point （C） and reentrant behaviour depending on the interaction parameters. We have also studied the temperature dependence of the total magnetization to find the compensation points, as well as to determine the type of behaviour, and N-type behaviour in Neel classification nomenclature existing in the system. The phase diagrams are constructed in eight different planes and it is found that the system also presents the compensation phenomena depending on the sign of the bilinear exchange interactions.

关键词： mixed spin-3/2 and spin-2 Ising system effective-field theory compensation phenomena phase diagrams

Determinations of ^(171)Er half-life and some ^(171)Tm transition energies

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Nuclear Science and Techniques 2018年第3期29卷 102-106页

作者： Tuncay bayram Serkan Akkoyun Department of Physics Faculty of Science Karadeniz Technical University Department of Physics University of Cumhuriyet

The neutrons have been captured by Erbium nuclei which were received by using clinical electron linear accelerator. In this experiment, the possibility of the neutron capture process has been observed because of emitted neutrons appearing in the experimental area. In particular,neutron capture of ^(170)Er nucleus has been observed. After the neutron capture of ^(170)Er nucleus, the unstable ^(171)Er has been formed and decayed into the ^(171)Tm. By using this reaction path, some transition energies of ^(171)Tm obtained from the residual activity measurements and the half-life of ^(171)Er have been determined, and they are in agreement with adopted values in the literature.

关键词： Erbium Thulium Half-life Transition energy Bremsstrahlung Photonuclear reaction

Dielectric and microstructural properties of YAG:Dy^(3+) ceramics

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Journal of Rare Earths 2018年第12期36卷 1310-1318页

作者： Munirah Abdullah Almessiere bayram Unal Abdulhadi Baykal Department of Physics College of Science Imam Abdulrahman Bin Faisal University Department of Nanomedicine Research Institute for Research & Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University Department of Software and Computer Engineering Istanbul Sabahattin Zaim University

Yttrium aluminium garnet(Y3Al5O12:YAG) singly doped with Dy3+ at different concentrations was prepared by solid state reactions using repeated heating cycles over the temperature range of 1300-1600 ℃. X-ray powder diffraction analysis confirms the presence of a well-crystallized YAG perovskite phase with cubic structure(by Rietveld refinement). The rare earth dopant is successfully integrated into the YAG host lattice without any major changes in the original structure. The temperature dependence,up to 250 ℃, of the conductivity, dielectric constant, dielectric loss, and loss tangent, at various frequencies of up to 5.0 MHz for undoped and doped crystals is compared to understand the electrical and structural characteristics. The experimental results reveal that Dy3+ dopants in YAG crystal significantly influence the conductivity, dielectric constant, and lossy mechanisms, which is probably due to the 3 d-AI ions and 4 f-Dy ions incorporated at different positions of both tetrahedral and octahedral symmetries in YAG:xDy3+ ceramics.

关键词： Yttrium aluminium garnet(YAG) X-ray diffraction(XRD) Conductivity Dielectric properties Rare earths

Vestibular evoked myogenic potentials in patients with diabetes mellitus

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Journal of Otology 2019年第3期14卷 89-93页

作者： Ali bayram Department of ENT Kayseri City Hospital Seker Mah.Molu Village

Although the exact mechanism and most involved region of the vestibular system have not yet been fully clarified, vestibular dysfunction has been demonstrated in patients with diabetes mellitus (DM). Vestibular evoked myogenic potential (VEMP) is a short latency electromyographic response to sound or vibration stimuli that may reflect otolith organ or related reflex functions. Since its first description in 1992, VEMP has become a significant part of the vestibular test battery as an objective measurement tool. In diabetic patients, VEMP responses have been studied in order to determine any otolith organ or related reflex dysfunctions. Here, we review the literature with regard to VEMP findings representing any peripheral vestibular end-organ dysfunction in patients with DM. Distinctive vestibular end-organ impairments seem to be demonstrated in patients with DM either with or without DNP via objective vestibular testing tools including VEMP recordings according to relevant studies. However, further studies with larger sample sizes are required to reveal the more definitive findings of VEMP recordings regarding the vestibular pathologies in patients with DM.

关键词： Diabetes mellitus Vestibular diseases Cervical vestibular evoked myogenic potentials Ocular vestibular evoked myogenic potentials

Mechanical memory operations in piezotransistive GaN microcantilevers using Au nanoparticleenhanced photoacoustic excitation

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Microsystems & Nanoengineering 2022年第1期8卷 161-174页

作者： Ferhat bayram Durga Gajula Digangana Khan Goutam Koley Holcombe Department of Electrical and Computer Engineering Clemson UniversityClemsonSC 29634USA School of Electrical and Computer Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

Nonlinear oscillations in micro-and nanoelectromechanical systems have emerged as an exciting research area in recent years due to their promise in realizing low-power,scalable,and reconfigurable mechanical memory and logic ***,we report ultralow-power mechanical memory operations utilizing the nonlinear oscillation regime of GaN microcantilevers with embedded piezotransistive AlGaN/GaN heterostructure field effect transistors as highly sensitive deflection *** between the high and low oscillatory states of the nonlinear oscillation regime was demonstrated using a novel phase-controlled opto-mechanical excitation setup,utilizing a piezo actuator and a pulsed laser as the primary and secondary excitation sources,***-based photoacoustic excitation was amplified through plasmonic absorption in Au nanoparticles deposited on a ***,the minimum switching energy required for reliable memory operations was reduced to less than a picojoule(pJ),which translates to one of the lowest ever reported,when normalized for mass.

关键词： excitation operations cantilever