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Comparison of body mass index, anti-müllerian hormone and insulin resistance parameters among different phenotypes of polycystic ovary syndrome

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gynecology and Obstetrics Clinical Medicine 2022年第4期2卷 164-170页

作者： türkan gürsu Alper Eraslan Berk Angun University of Health Sciences turkey Zeynep Kamil Maternity and Children's Training and Research HospitalDepartment of Obstetrics and GynecologyIstanbulTurkey Dunya IVF Center KyreniaCyprus Department of Reproductive Endocrinology and InfertilityTurkey

Background:Diagnosis of polycystic ovary syndrome(PCOS)depends on 2003 Rotterdam *** to these criteria there are four possible combinations resulting in various *** aimed(i)to confirm that the levels of body mass index(BMI),anti-müllerian hormone(AMH)levels and insulin resistance(IR)are higher in PCOS patients and higher in phenotype-A among PCOS patients,and(ii)to determine cut-off values for the diagnosis of PCOS and *** and methods:this study was conducted in an IVF Center,between November 2019 and January *** of infertile women participating in the study was evaluated *** such as menstruation pattern,clinical hyperandrogenism,age,BMI,follicle stimulating hormone(FSH),luteinizing hormone(LH),estradiol,thyroid stimulating hormone(tSH),prolactin,AMH,dehydroepiandrosterone sulphate(DHEA-S),fasting blood glucose,fasting insulin levels,antral follicle counts(AFC)and ovarian volumes were recorded for each *** were grouped as PCOS and non-PCOS,and PCOS group was further divided into 4 subgroups according to their *** of infertile patients with PCOS patients were compared with infertile non-PCOS patients and PCOS phenotypes were compared among each ***:Data of 244 infertile patients was included in the ***,AMH,AFC,and HOMA-IR were statistically higher in PCOS patients,compared to non-PCOS *** found the AMH level of>3.105 ng/ml to be having 90.8%sensitivity and 90%specificity to diagnose a patient as *** different phenotypes,also BMI,AMH,and insulin resistance index(HOMA-IR)levels were significantly higher in infertile PCOS phenotype-A when compared to other three phenotypes(p:0.003,p:0.000,and p:0.000,respectively).the AMH cut-off value to estimate phenotype-A was found as 6.095 ng/ml with 69.2%sensitivity and 86.7%*** did not found threshold levels of BMI and HOMA-IR with high sensitivity to identify ***:Properly di

关键词： Polycystic ovarian syndrome Body mass index Anti-müllerian hormone Insulin resistance PCOS Phenotypes

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Catalytic-kinetic spectrophotometric determination of vanadium (V) based on the Celestine blue-bromate-vanadium (V)-citric acid reaction

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Rare Metals 2011年第4期30卷 348-358页

作者： Ramazan gürkan Olcay gürkan Department of Chemistry Faculty of Sciences University of Cumhuriyet Sivas Fen Lisesi Emek mah. 64. Basari Sok. TR-58010 Merkez Sivas TURKEY

A novel sensitive and relatively selective kinetic method is presented for the determination of V（V） based on its catalytic effect on the oxidation reaction of Celestine blue by potassium bromate in the presence of citric acid as an activator. the reaction was monitored spectropho- tometrically by measuring the decrease in absorbance of Celestine blue at a maximum absorption wavelength of 540 nm between 0.5 and 9 min （the fixed-time method） in an H3PO4 medium at 45℃. the effect of various parameters such as concentrations of H3PO4, citric acid, potassium bromate and Celestine blue, ionic strength, reaction temperature and time on the rate of V（V） catalyzed reaction was studied. the method is free from the most interferences, especially from large amounts of V（IV）. the decrease in absorbance is proportional to the concentration of V（V） over the entire concentration range tested （0.025-1.25 ***^-1） with a detection limit of 6.80 tag.L^-1 （according to statistical 3Sblank/k criterion） and a coefficient of variation （CV） of 1.78% （for ten replicate measurements at 95% confidence level）. the proposed method suffers from a few interferences such as Cr（VI） and Hg（Ⅱ） ions. the method was successfully applied to the determination of V（V） in river water, lake water, tap water, natural drinking water samples and a certified standard reference material such as SRM-1640 with satis- factory results. the vanadium contents of natural water samples were detected by using both linear calibration curve and standard addition curve methods. the recoveries of spiked vanadium （V） into the certified standard water sample were found to be quantitative, and the reproducibility was satisfactory. It was observed that the results of the SRM 1640 were in good agreement with the certified value.

关键词： catalytic effect vanadium spectrophotometry bromates Celestine blue citric acid

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Micellar sensitized catalytic kinetic spectrophotometry for highly accurate and reproducible determination of Ⅴ(Ⅳ) and Ⅴ(Ⅴ)

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Rare Metals 2014年第4期33卷 466-478页

作者： Ramazan grkan Can Emektas Department of Chemistry Faculty of SciencesUniversity of Cumhuriyet

A highly accurate and reproducible micellar sensitized kinetic method was proposed for determination of V（VI）. the method is based on its catalytic effect on the oxidation of Coomassie brilliant blue R 250 （CBB＋） by bromate at pH 2.0. the reaction was monitored spectro- photometrically by measuring absorbance change with a fixed-time method of 5 min at 594 and 552 nm with and without surfactant. the variables influencing the calibra- tion sensitivity were extensively investigated, and the optimal conditions were established. the linear calibration range was 10-1,600 μg.L-1 with a relative SD ranging from 0.35 % to 3.35 % （for five replicate measurements of 75, 500, 1,000, and 1,500 μg.L-1） and a detection limit of 3.8 μg.L-1. the selectivity was also investigated, and greatly enhanced by suitable masking agents. the method was successfully applied to the analysis of V（IV） in pre- sence of excess V（V） up to 25 fold in environmental waters with the recoveries of 100.0 %-102.8 % for V（IV） and 95.7 %-99.7 % for total V. Its accuracy was validated by analysis of certified reference material via the present kinetic method and standard flame atomic absorption spectrometric method after extractive preconcentration with good agreement between certified and found values.

关键词： Vanadium speciation Kineticspectrophotometry Bromate Coomassie brilliant blue R250 Micellar effect

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A novel indicator system for catalytic spectrophotometric determination and speciation of inorganic selenium species (Se(Ⅳ), Se(Ⅵ)) at trace levels in natural lake and river water samples

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Rare Metals 2011年第5期30卷 477-487页

作者： Ramazan gürkan Halil brahim Ulusoy Mehmet Akay Pinar Bulut Department of Chemistry Faculty of Science University of Cumhuriyet

A novel catalytic kinetic method is proposed for the determination of Se（Ⅳ）, Se（Ⅵ）, and total inorganic selenium in water based on the catalytic effect of Se（Ⅳ） on the reduction of Celestine blue by sodium sulfide at pH 7.0 phosphate buffer. the fixed-time method was adopted for the determination and speciation of inorganic selenium. Under the optimum conditions, the two calibration graphs are linear with a good correlation coefficient in the range 2-20 and 20-200 μg·L-1 of Se（Ⅳ） for the fixed-time method at 30℃. the experimental and theo- retical detection limits of the developed kinetic method were found to be 0.21 and 2.50 μg·L-1 for the fixed-time method （3 min）. All of the variables that affect the sensitivity at 645 nm were investigated, and the optimum conditions were established. the interference effect of various cations and anions on the Se（Ⅳ） determination was also studied. the selectivity of the selenium determination was greatly improved with the use of the strongly cation exchange resin such as Amberlite IR120 plus as long as chelating agents of thiourea and thiosulphate. the proposed kinetic method was validated statistically and through recovery studies in natural water samples. the relative standard deviations （RSDs） for ten replicate measurements of 2, 10, and 20 μg·L-1 of Se（Ⅳ） change between 0.35% and 5.58%, while the RSDs for ten replicate measurements of 3, 6, and 12 μg·L-1 of Se（Ⅵ） change between 0.49% and 1.61%. Analyses of a certified standard reference material （NISt SRM 1643e） for selenium using the fixed-time method showed that the proposed kinetic method has good accuracy. the Se（Ⅳ）, Se（Ⅵ）, and total inorganic selenium in lake and river water samples have been successfully determined by this method after selective reduction of Se（Ⅵ） to Se（Ⅳ）.

关键词： selenium speciation Celestine blue catalytic effect kinetic spectrophotometry natural waters

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Synergistic optimization framework for the process synthesis and design of biorefineries

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Frontiers of Chemical Science and Engineering 2022年第2期16卷 251-273页

作者： Nikolaus IVollmer Resul Al Krist V.gernaey gürkan Sin Process and Systems Engineering(PROSYS)Research Center Department of Chemical and Biochemical EngineeringTechnical University of Denmark2800 Kgs.LyngbyDenmark Novo Nordisk A/S 2880 BagsværdDenmark

the conceptual process design of novel bioprocesses in biorefinery setups is an important task,which remains yet challenging due to several *** propose a novel framework incorporating superstructure optimization and simulation-based optimization *** this context,several approaches for superstructure optimization based on different surrogate models can be *** means of a case study,the framework is introduced and validated,and the different superstructure optimization approaches are *** results indicate that even though surrogate-based optimization approaches alleviate the underlying computational issues,there remains a potential issue regarding their *** development of appropriate surrogate models,comprising the selection of surrogate type,sampling type,and size for training and cross-validation sets,are essential *** this aspect,satisfactory validation metrics do not ensure a successful outcome from its embedded use in an optimization ***,the framework’s synergistic effects by sequentially performing superstructure optimization to determine candidate process topologies and simulationbased optimization to consolidate the process design under uncertainty offer an alternative and promising *** findings invite for a critical assessment of surrogatebased optimization approaches and point out the necessity of benchmarking to ensure consistency and quality of optimized solutions.

关键词： biotechnology surrogate modelling superstructure optimization simulation-based optimization process design

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Autoimmune complications and clinical outcomes of herpes simplex encephalitis in children: A case series

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Asian Pacific Journal of tropical Medicine 2023年第5期16卷 232-238页

作者： gül Demet KayaÖzçora Elif Söbü türkan UygurŞahin Enes Salı gonca Bektaş Department of Pediatric Neurology Health Sciences FacultyHasan Kalyoncu UniversityGaziantepTurkey Department of Pediatric Endocrinology Kartal Dr.Lutfi Kirdar City HospitalIstanbulTurkey Department of Pediatric Neurology Bezmialem University Medical FacultyIstanbulTurkey Department of Pediatric Infectious Diseases Umraniye Research and Training HospitalIstanbulTurkey Department of Pediatric Neurology Boston Children’s HospitalBostonUSA

Objective:to report the neurologic prognosis and autoimmune complications of 16 cases of childhood herpes simplex virus ***:the study was conducted atŞanlıurfa training and Research Hospital,turkey from June 2017 to August *** study included 16 pediatric patients aged between 6 months and 17 years(median age 77.7 months)who were diagnosed with herpes simplex virus type 1 encephalitis by pediatric infectious disease and pediatric neurology *** were followed using patient records,and interviews at the pediatric neurology clinic or via the *** and demographic data,received therapies,neurologic prognosis and complications were ***:Patients with and without autoimmune encephalitis were compared in terms of age,sex,symptom duration before treatment,initial cerebrospinal fluid protein,glucose,red blood count and white blood count but no significant difference was *** complications were seen in four patients.N-methyl-D-aspartate encephalitis was observed in three patients and choreoathetosis was seen in one *** average follow-up period was 48.3 ***-five percent of the patients were receiving multiple antiepileptic drug(AED)treatment,43.8%were receiving single AED treatment and 31.3%were not receiving AED treatment at the end of the *** disability was observed in 12.5%and drug-resistant epilepsy was observed in 6.3%who had autoimmune ***:Seizures and movement disorders were controlled with immunotherapy and autoantibodies should be studied *** should be started early upon recognition of autoimmune complications through follow-up by measuring autoantibody levels and clinical examination *** prevention and curative treatment modalities are needed to avoid herpes simplex virus encephalitis complications.

关键词： Herpes simplex virus encephalitis Autoimmune complications Epilepsy Children Steroid Prognosis

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Vibrational investigation of 1-cyclopentylpiperazine:A combined experimental and theoretical study

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Science China(Physics,Mechanics & Astronomy) 2014年第9期57卷 1654-1661页

作者： BAgLAYAN zge KESAN gürkan PARLAK Cemal ALVER zgür SENYEL Mustafa Department of Physics Science Faculty Anadolu University Institute of Physics and Biophysics Faculty of Science University of South Bohemia Department of Physics Dumlupinar University

Ft-IR and Raman spectra of 1-cyclopentylpiperazine(1cppp)have been experimentally examined in the region of 4000–*** optimized geometric parameters,conformational equilibria,normal mode frequencies and corresponding vibrational assignments of 1cppp(C9H18N2)are theoretically examined by means of B3LYP hybrid density functional theory(DFt)method together with 6-31++g(d,p)basis *** the basis of potential energy distribution(PED)reliable vibrational assignments have been made and the thermodynamics functions,highest occupied and lowest unoccupied molecular orbitals(HOMO and LUMO)of 1cppp have been *** are employed for four different conformations in C1 and Cs point groups of 1cppp in gas *** between the experimental and theoretical results indicates that B3LYP method is able to provide satisfactory results for predicting vibrational frequencies and the structural parameters,vibrational frequencies and ***,C1(equatorial-axial)point group has been found as the most stable conformer of 1cppp.

关键词： 1-cyclopentylpiperazine vibrational spectra PED DFt B3LYP

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An SPH Framework for Earthquake-Induced Liquefaction Hazard Assessment of geotechnical Structures

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 251-277页

作者： Sourabh Mhaski g.V.Ramana Department of Civil Engineering Indian Institute of Technology DelhiNew Delhi110016India

Earthquake-induced soil liquefaction poses significant risks to the stability of geotechnical structures *** understanding of the liquefaction triggering,and the post-failure large deformation behaviour is essential for designing resilient *** present study develops a Smoothed Particle Hydrodynamics(SPH)framework for earthquake-induced liquefaction hazard assessment of geotechnical *** coupled flowdeformation behaviour of soils subjected to cyclic loading is described using the PM4Sand model implemented in a three-phase,single-layer SPH framework.A staggered discretisation scheme based on the stress particle SPH approach is adopted to minimise numerical inaccuracies caused by zero-energy modes and tensile ***,non-reflecting boundary conditions for seismic analysis of semi-infinite soil domains using the SPH method are *** numerical framework is employed for the analysis of cyclic direct simple shear test,seismic analysis of a level ground site,and liquefaction-induced failure of the Lower San Fernando *** agreement for liquefaction triggering and post-failure behaviour demonstrates that the SPH framework can be utilised to assess the effect of seismic loading on field-scale geotechnical *** present study also serves as the basis for future advancements of the SPH method for applications related to earthquake geotechnical engineering.

关键词： Earthquake seismic liquefaction stress particle PM4Sand smoothed particle hydrodynamics(SPH)

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热解炭去除污水中Cr(Ⅵ)（英文）

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新型炭材料 2016年第5期31卷 501-509页

作者： türkan Altun Yakup Kar Department of Chemical Engineering Selcuk UniversityCampus Department of Petroleum & Natural gas Engineering skenderun Technical University

以胡桃壳在450℃裂解得到生物质炭BC450,以胡桃壳与20%沥青砂在450℃裂解得到BCtS20,与商业活性炭(CAC)进行对比研究去除污水中Cr(Ⅵ)的能力。与BC450相比,BCtS20具有更丰富的表面官能团。在适当条件下,BC450、BCtS20、CAC对Cr(Ⅵ)的去... 详细信息

以胡桃壳在450℃裂解得到生物质炭BC450,以胡桃壳与20%沥青砂在450℃裂解得到BCtS20,与商业活性炭(CAC)进行对比研究去除污水中Cr(Ⅵ)的能力。与BC450相比,BCtS20具有更丰富的表面官能团。在适当条件下,BC450、BCtS20、CAC对Cr(Ⅵ)的去除率分别为80.47%、90.01%、95.69%。采用Langmuir、Freundlich、D-R模型研究吸附等温线,其中Langmuir模型最佳。BC450、BCtS20、CAC的最大Langmuir吸附容量分别为36.55、49.76、51.94 mg/g。这些炭材料对Cr(Ⅵ)的吸附可能归因于由离子交换、静电作用与螯合作用引起的化学过程。

关键词：热解炭胡桃壳 Cr(Ⅵ)

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Dynamic Forecasting of traffic Event Duration in Istanbul:A Classification Approach with Real-time Data Integration

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Computers, Materials & Continua 2024年第8期80卷 2259-2281页

作者： Mesut Ulu Yusuf Sait türkan Kenan Menguc Ersin Namlı tarık Kucukdeniz Occupational Health and Safety Department Bandirma Onyedi Eylul UniversityBalikesir10200Türkiye Department of Industrial Engineering Istanbul University-CerrahpasaIstanbul34320Türkiye Department of Industrial Engineering Istanbul Technical UniversityIstanbul34467Türkiye

today,urban traffic,growing populations,and dense transportation networks are contributing to an increase in traffic *** incidents include traffic accidents,vehicle breakdowns,fires,and traffic disputes,resulting in long waiting times,high carbon emissions,and other undesirable *** is vital to estimate incident response times quickly and accurately after traffic incidents occur for the success of incident-related planning and response *** study presents a model for forecasting the traffic incident duration of traffic events with high *** proposed model goes through a 4-stage process using various features to predict the duration of four different traffic events and presents a feature reduction approach to enable real-time data collection and *** the first stage,the dataset consisting of 24,431 data points and 75 variables is prepared by data collection,merging,missing data processing and data *** the second stage,models such as Decision trees(Dt),K-Nearest Neighbour(KNN),Random Forest(RF)and Support Vector Machines(SVM)are used and hyperparameter optimisation is performed with *** the third stage,feature selection and reduction are performed and real-time data are *** the last stage,model performance with 14 variables is evaluated with metrics such as accuracy,precision,recall,F1-score,MCC,confusion matrix and *** RF model outperforms other models with an accuracy of 98.5%.the study’s prediction results demonstrate that the proposed dynamic prediction model can achieve a high level of success.

关键词： traffic event duration forecasting machine learning feature reduction shapley additive explanations(SHAP)

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