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Is there a connection between synthetic bone grafts and sisters chromatide exchange?

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Open Journal of Stomatology 2013年第8期3卷 447-451页

作者： Banu Gurkan Koseoglu Amila Brkic mehmet Ali erdem Sukru Ozturk Sukru Palanduz Kivanc Cefle Department of Oral and Maxillofacial Surgery School of DentistryIstanbul UniversityIstanbulTurkey Department of Oral Surgery School of DentistrySarajevo UniversitySarajevoBosnia and Herzegovina Division of Medical Genetics Department of Internal MedicineSchool of MedicineIstanbul UniversityIstanbulTurkey

Background: In oral and maxillofacial surgery, synthetic bone grafts are most widely used as bone substitutes, due to the limited sources of autologous bone. The aim of this study was to examine the influence of three different synthetic bone grafts (Cerasorb, Fortoss and Perioglass) on sisters chromatide exchanges (SCEs) in peripheral lymphocytes. Materials and Methods: Peripheral blood samples taken from 68 patients (45 females and 23 males), who underwent oral surgery procedures, such as apical resection, cyst enucleation or periodontal curretage, were obtained for SCE a day before and two months after the surgeries. A control group included 30 patients, while the study group was made of the patients who underwent bone grafting with Cerasorb? (11 patients), Fortoss? VITAL (10 patients) or Perioglass? (17 patients). Results: Comparing with the results of the study group before and after the treatment, it was concluded that the results were statistically significant (p = 0.001). In the Perioglass? subgroup, a greater statistical significance (p = 0.003) was noted, than that in either the Cerasorb? (p = 0.620) or Fortoss? (p = 0.210) subgroups, in which there was no statistical significance. Conclusions: Although further investigations may be necessary, our results suggest that the synthetic bone grafts might have an influence on SCE in peripheral lymphocytes.

关键词： Bone Graft Sisters Chromatide Exchange Genotoxic Bone Defect

Investigation of Erosion Corrosion Caused by Drinking Water in the Faucet with Computational Fluid Dynamics

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Journal of Metallic Material Research 2023年第1期6卷 1-6页

作者： Kadir Gok HDeniz Ada mehmet erdem Arif Gök KıvançTopçuoğlu MAli Alkan Department of Biomedical Engineering Engineering and Architecture Facultyİzmir Bakircay UniversityIzmir35000Turkey Chemical Technologies Kütahya Vocational School of Technical SciencesKütahya Dumlupinar UniversityKutahya43020Turkey Mechanical and Metal Technologies Kütahya Vocational School of Technical SciencesKütahya Dumlupinar UniversityKutahya43020Turkey Department of Industrial Design Architecture FacultyKütahya Dumlupinar UniversityKutahya43020Turkey Department of Construction Technology Ula Ali Koçman Vocational High SchoolMuğla UniversityMuğla48000Turkey Department of Electricity and Energy Ula Ali Koçman Vocational High SchoolMuğla UniversityMuğla48000Turkey

In this study,the reason for erosion-corrosion of drinking or mains water in the faucet was investigated by computational fluid *** used in homes,the service sector,and industry are responsible for transporting different types of fluids from one place to *** the faucet design,the SolidWorks program was used for 3D ***-faucet flow analyses were performed using Ansys Fluent,a computational fluid dynamics program based on the finite volume *** the analyses,lime particles were *** the end of the analysis,the amount of erosion in the faucet was obtained.

关键词： Faucet Erosion corrosion CFD Simulation

Robust Backstepping Control of a Quadrotor Unmanned Aerial Vehicle under Colored Noises

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Computers, Materials & Continua 2025年第1期82卷 777-798页

作者： mehmet Karahan Electrical and Electronic Engineering Department Atilim UniversityAnkara06830Turkey

Advances in software and hardware technologies have facilitated the production of quadrotor unmanned aerial vehicles(UAVs).Nowadays,people actively use quadrotor UAVs in essential missions such as search and rescue,counter-terrorism,firefighting,surveillance,and cargo *** performing these tasks,quadrotors must operate in noisy ***,a robust controller design that can control the altitude and attitude of the quadrotor in noisy environments is of great *** researchers have focused only on white Gaussian noise in their studies,whereas researchers need to consider the effects of all colored noises during the operation of the *** study aims to design a robust controller that is resistant to all colored ***,a nonlinear quadrotormodel was created with ***,a backstepping controller resistant to colored noises was *** backstepping controller was tested under Gaussian white,pink,brown,blue,and purple *** and Lyapunov-based controller designswere also carried out,and their time responses(rise time,overshoot,settling time)were compared with those of the backstepping *** the simulations,time was in seconds,altitude was in meters,and roll,pitch,and yaw references were in *** and settling time values were in seconds,and overshoot value was in *** the obtained values are examined,simulations prove that the proposed backstepping controller has the least overshoot and the shortest settling time under all noise types.

关键词： Backstepping control colored noises Gaussian noise Lyapunov stability quadrotor robustness PID control

鞣制工艺产生的铬革屑中铬的浸析作用及其稳定性的研究

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北京皮革（中外鞋讯）（下） 2009年第8期 98-101页

作者： mehmet erdem[土耳其] Arzu Ozverdi[土耳其] 王睿（编译）不详四川大学制革清洁技术国家工程实验室成都610065

铬革屑（CS）是制革工业中附带的一种固体残渣，本研究考察铬革屑（CS）中铬的浸析作用和潜在污染。通常铬革屑含有2.27％的铬．对CS应用热稳定方式实验铬固定。为达到该目的，首先我们研究液／固比率，接触时间，pH值和逐级提取对铬革... 详细信息

铬革屑（CS）是制革工业中附带的一种固体残渣，本研究考察铬革屑（CS）中铬的浸析作用和潜在污染。通常铬革屑含有2.27％的铬．对CS应用热稳定方式实验铬固定。为达到该目的，首先我们研究液／固比率，接触时间，pH值和逐级提取对铬革屑中铬浸析作用的影响。可以确定的是由铬革屑附带的铬对环境是一种有毒材料。在250℃～500℃下对CS应用热稳定程序进行铬固定。CO2空气下当加热铬革屑温度达到350℃时，CS中的铬可以有效的稳定，对从稳定实验的得到的样品进行浸析实验，将其结果与铬革屑的样品对比。同时，通过样品的TCLP实验确定污染潜在性，铬革屑的排放情况以及它的稳定产物。当所有样品在350℃以上热稳定时测试液中的铬浓度低于USEPA常规限量值5毫克／升时．从铬革屑中浸出的铬浓度是USEPA常规限量值的30倍以上。

关键词：铬热稳定制革废弃物铬革屑皮革工艺

Exploring the dynamics of creative tourism:A tourist-centric perspective to achieve economic sustainable development

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Journal of Mountain Science 2025年第1期22卷 278-295页

作者： ZOU Fuxia Atefeh AHMADI DEHRASHID mehmet AKIF CIFCI Emrah ARSLAN Nina KHALIGHI College of Tourism and Aviation Management Hunan Women's UniversityChangsha 410004China Faculty of Natural Resources Department of ClimatologyUniversity of KurdistanSanandaj ***Iran Member of Department of Zrebar Lake Economic-social Research Kurdistan Studies InstituteUniversity of KurdistanSanandaj ***Iran Department of Computer Engineering Bandirma Onyedi Eylul UniversityBalikesir 10200Türkiye Engineering and Informatics Department Klaipėdos ValstybinėKolegija/Higher Education InstitutionKlaipeda 92294Lithuania Engineering and Informatics Department KTO KaratayKonya 42020Türkiye Department of Urban Planning and Design Faculty of Art and ArchitectureUniversity of KurdistanSanandaj ***Iran

Creative tourism is a dynamic and innovative approach to tourism,which points out the importance of people's active participation and their immersion in such *** a vernacular context,it should attract people(local and tourists)attention to accomplish its main *** its rich cultural and natural assets,Kurdistan province faces several challenges that impact its tourism *** achieve that,the study uses quantitative approach to thoroughly analyze and evaluate the components of creative tourism in this *** research focuses on tourists who visited the province's ten towns during the spring and summer of *** collection utilized a Likert-scale questionnaire ranging from"very good"to"very poor".The study employed a semistructured questionnaire developed through qualitative interviews alongside a researcher-made questionnaire validated by experts from the University of *** qualitative questionnaire achieved a high-reliability score of 93%using Cronbach's alpha ***-depth interviews and literary research were conducted to identify creative tourism components and indicators,informing the development of a quantitative *** analysis was performed using SPSS 20 and AMOS software to scrutinize the survey findings,providing insights into enhancing creative tourism strategies in Kurdistan *** results reveal the varying significance of these dimensions,with the cultural dimension identified as the most crucial(factor loading:0.95),followed by the social(0.92),economic(0.88),and managerial/political dimensions(0.83).The study highlights the importance of cultural planning,community engagement,and infrastructural support in fostering creative ***,it explores the impact of creative industries,such as music and arts rooted in Kurdish culture,on tourism *** diversification and spatialphysical considerations are critical factors in enhancing Kurdistan's appeal as a creative

关键词： Creative tourism Tourism development Local and regional development Structural equation Iran

Market Drivers in India’s Smart Grid:Responsibilities and Roles of Stakeholders

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Energy Engineering 2025年第1期122卷 101-128页

作者： Abhay Sanatan Satapathy Suresh Kumar Sahoo Asit Mohanty Yasser Fouad Manzoore Elahi Mohammad Soudagar erdem Cuce Faculty of Management Studies Sri Sri UniversityCuttack754006India Institute of Power Engineering National Energy UniversityJalan Ikram-UnitenKajangSelangor43000Malaysia Centre of Research Impact and Outcome Chitkara UniversityRajpura140417PunjabIndia Department of Applied Mechanical Engineering College of Applied EngineeringMuzahimiyah BranchKing Saud UniversityRiyadh11421Saudi Arabia College of Engineering Lishui UniversityLishui323000China Department of Mechanical Engineering Graphic Era(Deemed to be University)Dehradun248002UttarakhandIndia Department of Mechanical Engineering Faculty of EngineeringUniversity of MalayaKuala Lumpur50603Malaysia Department of Mechanical Engineering Faculty of Engineering and ArchitectureRecep Tayyip Erdogan UniversityZihni Derin CampusRize53100Turkey Center for Research Impact&Outcome Chitkara UniversityRajpura140401PunjabIndia University Centre for Research and Development Chandigarh UniversityMohali140413PunjabIndia

The emergence of smart grids in India is propelled by an intricate interaction of market dynamics,regulatory structures,and stakeholder *** study analyzes the primary factors that are driving the widespread use of smart grid technologies and outlines the specific roles and obligations of different stakeholders,such as government entities,utility companies,technology suppliers,and *** activities and regulations are crucial in facilitating the implementation of smart grid technology by offering financial incentives,regulatory assistance,and strategic *** firms have the responsibility of implementing and integrating smart grid infrastructure,with an emphasis on improving the dependability of the grid,minimizing losses in transmission and distribution,and integrating renewable energy *** companies offer the essential hardware and software solutions,which stimulate creativity and enhance *** actively engage in the energy ecosystem by participating in demand response,implementing energy saving measures,and adopting distributed energy resources like solar panels and electric *** study examines the difficulties and possibilities in India’s smart grid industry,highlighting the importance of cooperation among stakeholders to build a strong,effective,and environmentally friendly energy future.

关键词： Smart grid stakeholders smart grid technology market drivers

ECHOS OF THE STEINER-LEHMUS EQUAL BISECTORSSTHEOREM

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Acta Mathematica Scientia 2025年第1期45卷 257-263页

作者： Christoph BÖRGERS Eric L.GRINBERG mehmet ORHON Junhao SHEN Department of Mathematics Tufts UniversityMedfordMA02155USA Department of Mathematics University of Massachusetts BostonBostonMA02125USA Department of Mathematics&Statistics University of New HampshireDurhamNH03824USA

The Steiner-Lehmus equal bisectors theorem originated in the mid 19th *** its age,it would have been accessible to Euclid and his *** theorem remains evergreen,with new proofs continuing to appear *** theorem has fostered discussion about the nature of proof itself,direct and *** we continue the momentum by providing a trigonometric proof,relatively short,based on an analytic estimate that leverages algebraic trigonometric *** proofs of the theorem exist in the *** of these contain key ideas that already appeared in ***’1850 proofs,not always with *** the aim of increasing awareness of and making more accessible Lehmus’proofs,we provide an annotated *** conclude with remarks on different proofs and relations among them.

关键词： Steiner-Lehmus theorem equal bisectors

Selective recovery of rare earth elements by smelting of magnets

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Journal of Rare Earths 2025年第1期43卷 209-217,I0008页

作者： Venkata Lakshmi Borra Prasanta Jana PPSahoo Prakash Venkatesan mehmet Ali Recai Onal Chenna Rao Borra Department of Metallurgical and Materials Engineering Indian Institute of Technology KharagpurWest Bengal721302India R&D Tata Steel Ltd.Jamshedpur831001India Department of Materials Engineering Synthesis and Recycling(4MAT)Universite Libre de BruxellesCP165/631050BrusselsBelgium GenoMines 630 Rue Noetzlin91190ParisFrance

Rare earth elements(REEs)play a crucial role in many technologies from daily appliances in cell phones to more advanced wind turbines and electric *** magnets account for a quarter of total global REEs production and have high recycling *** this study,smelting process was used to selectively oxidize REEs in the permanent magnets by adding Fe_(2)O_(3).This separates REEs into a slag phase from an iron-rich metallic phase.B_(2)O_(3) was also added to the system as a flux to lower the slag melting *** minimizes REEs loss to the metallic phase and allows a more efficient phase *** effect of flux and oxidizing agent addition was investigated on both regular and cerium-rich NdFeB(NdCeFeB)*** 1350℃and for 1 h,the slag phase was successfully separated from the metallic phase with the addition of 0.8 stoichiometric amount of Fe_(2)O_(3) and 40 wt%of B_(2)O_(3).Scanning electron microscopy-energy dispersive X-ray spectroscopy(SEM-EDX)analysis reveals that REEs in the magnet do not migrate to the metal phase while the REE-rich slag phase contains almost no *** the selective removal of iron into the metallic phase,REEs are recovered from the slag phase through an acid leaching process allowing>99%of REEs *** in the magnet can also be recovered as useful boric acid by evaporation and crystallisation *** proposed process in this study is reagent and energy-efficient with almost complete valorisation of both NdCeFeB and NdFeB magnets.

关键词： Recycling Rare earth elements NdFeBmagnets Smelting Leaching

Potential effects of adenosine triphosphate and melatonin on oxidative and inflammatory optic nerve damage in rats caused by 5-fluorouracil

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International Journal of Ophthalmology(English edition) 2025年第2期18卷 222-228页

作者： Ahmet mehmet Somuncu Busra Parlak Somuncu Ahmet Duhan Ozbay Ibrahim Cicek Bahadir Suleyman Renad Mammadov Seval Bulut Tugba Bal Tastan Taha Abdulkadir Coban Halis Suleyman Aliyev Aydin Trabzon Kanuni Education and Research Hospital Health Sciences UniversityTrabzon 61250Turkiey Provincial Health Directorate Ministry of Health of the Republic of TurkeyTrabzon 61040Turkiey Department of Ophthalmology Erzurum City HospitalHealth Sciences UniversityErzurum 25240Turkiey Department of Ophthalmology Faculty of MedicineErzincan Binali Yildirim UniversityErzincan 24100Turkiey Department of Pharmacology Faculty of MedicineErzincan Binali Yildirim UniversityErzincan 24100Turkiey Department of Histology and Embryology Faculty of MedicineErzincan Binali Yildirim UniversityErzincan 24100Turkiey Department of Biochemistry Faculty of MedicineErzincan Binali Yildirim UniversityErzincan 24100Turkey Department of Pharmacology Azerbaijan Medical UniversityBakuAZ1022Azerbaijan

AIM:To investigate the effects of adenosine triphosphate(ATP)and melatonin,which have antioxidant and antiinflammatory activities,on potential 5-fluorouracil(5-FU)-induced optic nerve damage in ***:Twenty-four rats were categorized into four groups of six rats:healthy(HG),5-FU(FUG),ATP+5-FU(AFU),and melatonin+5-FU(MFU).ATP(4 mg/kg)and melatonin(10 mg/kg)were administered intraperitoneally and orally,*** hour after ATP and melatonin administration,rats in the AFU,MFU,and FUG were intraperitoneally injected with 5-FU(100 mg/kg).ATP and melatonin were administered once daily for 10d.5-FU was administered at a single dose on days 1,3,and 5 of the *** 10d,the rats were euthanized and optic nerve tissues were *** nerve tissues were biochemically and histopathologically ***:ATP and melatonin treatments inhibited the increase in malondialdehyde(MDA)and interleukin-6(IL-6)levels,which were elevated in the *** treatments also prevented the decrease in total glutathione(tGSH)levels and the superoxide dismutase(SOD)and catalase(CAT)activities(P<0.001).This inhibition was higher in the ATP group than in the melatonin group(P<0.001).ATP prevented histopathological damage better than melatonin(P<0.05).CONCLUSION:ATP and melatonin have the potential to be used in alleviating 5-FU-induced optic nerve *** addition,ATP treatment shows better protective effects than melatonin.

关键词： adenosine triphosphate melatonin 5-fluorouracil optic nerve damage antioxidant antiinflammatory