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Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Geological Engineering Journal / Jeoloji Mühendisligi Dergisi is the property of UCTEA Geology Engineer of Turkey (TMMOB Jeoloji Muhendisleri Odasi) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

OBJECTIVE: The aim of this in vitro study was to evaluate the effect of three finishing and polishing systems on the surface roughness of nano-manufactured composite resins. MATERIALS AND METHOD: Nano-ceramic Ceram-X (Dentsply DeTrey, Konstanz, Germany), nano-filled Premise (Kerr Corporation, Orange, NJ, USA) and nano-filled Clearfil Majestic (Kuraray Medical Inc., Tokyo, Japan) composite resins were tested. Forty samples of each material were cured under matrix strips. The samples were then randomly assigned into four test groups: 1) unpolished; 2) polished with burs out of resin reinforced by zircon-rich glass fiber (Stainbuster, Abrasive Technology, Inc., Lewis Center, OH, USA); 3) polished with aluminum oxide impregnated polymer points (Enhance Finishing System, Dentsply Caulk, Milford, DE, USA) followed by diamond impregnated micro-polishing points (PoGo, Dentsply Caulk); and 4) polished with aluminum oxide disks (Sof-Lex, Dentsply Caulk). The sample surface roughness values (Ra) were determined using a profilometer, and the surfaces were observed under a scanning electron microscope. Data were analyzed using the Kruskal-Wallis test. RESULTS: No statistically significant differences in surface roughness were detected among the finishing and polishing systems (p>0.05). However, all finishing and polishing techniques created statistically rougher surfaces than the control group (p

Amaç: Bu çalışmanın amacı bir nanofil (Filtek Supreme XT) ve dört nanohibrit kompozitin (İvoclar Tetric EvoCeram, Dentsply Ceram X, Voco Grandio, Bisco Ælite) polisaj sonrası yüzey sertliklerini ve pürüzlülüklerini değerlendirmektir. Gereç ve Yöntemler: Her test için her bir kompozitten on adet örnek hazırlandı ve üreticilerin talimatları doğrultusunda şeffaf bant altında polimerize edildi. Polimerizasyondan sonra tüm örnekler OptiDisc polisaj diskleri ile 10’ar sn polisajlandı. Yüzey sertliğinin değerlendirilmesinde Vicker’s sertlik testi ve yüzey pürüzlülüğü için ise yüzey profilometre testi kullanıldı. İstatistiksel analizde her test için örneklerin üç farklı bölgesinden elde değerlerin ortalamaları kullanıldı. Bulgular: Kompozitler arasında yüzey sertliği ve pürüzlülüğü açısından istatistiksel olarak anlamlı farklılıklar bulundu. En yüksek yüzey sertliği değeri Grandio ve Supreme XT gruplarından elde edilirken, en düşük yüzey pürüzlülüğü değeri Supreme XT grubundan elde edildi. Sonuç: Bu bilgiler ışığında kompozit rezin seçerken doldurucu içeriğinin ve yoğunluğunun da dikkate alınması gerektiği görülmüştür.

Copyright of Selcuk Dental Journal is the property of Selcuk Dental Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Odontologica Turcica is the property of Acta Odontologica Turcica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Health Sciences / Sağlık Bilimleri Dergisi is the property of Erciyes Universitesi Saglik Bilimleri Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Selcuk Dental Journal is the property of Selcuk Dental Journal and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Gümüshane Üniversitesi Fen Bilimleri Enstitüsü Dergisi is the property of Gumushane University, Faculty of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bilecik Seyh Edebali University Journal of Science / Bilecik Şeyh Edebali Üniversitesi Sosyal Bilimler Dergisi is the property of Bilecik Seyh Edebali University Journal of Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering & Architectural Faculty of Eskisehir Osmangazi University / Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi is the property of Eskisehir Osmangazi University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Nigde Omer Halisdemir University Journal of Engineering Sciences / Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi is the property of Nigde Omer Halisdemir Universitesi (NOHU), Muhendislik Fakultesi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of International Journal of Engineering Research & Development (IJERAD) is the property of International Journal of Engineering Research & Development and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Agricultural Faculty of Gaziosmanpasa University / Gazi Osman Pasa Üniversitesi Ziraat Fakültesi Dergisi is the property of Gaziosmanpasa University, Agricultural Faculty and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: Surface properties of dental casts have critical importance in dental laboratory procedures. However, surface properties of the dental cast are affected by several applications in dental laboratory. One of these applications is the slurry water immersion of the dental casts in some techniques such as preparing casts for duplication. Thus, the aim of the present study was to compare the effects of slurry water immersion and tap water immersion on the surface roughness of type III and type IV dental stones. Material-Method: Sixty master stone blocks were prepared with type III and type IV dental stone. Half of the each specimen group was immersed in slurry water and the other half in tap water for 30 minutes. Each of four groups was then allowed to dry for 24 hours without any contamination to the surface of stone blocks. The surface roughnesses of the specimens were determined using a profilometer. The data were statistically analyzed using one-way analysis of variance (ANOVA). Results: Specimens immersed in tap water showed statistically significant surface roughness (p<0.05) than those immersed in slurry water. The difference was more prominent between ADA type III dental stone groups. Discussion: Slurry water dissolved the surface of gypsum cast less than tap water. Thus, within the limitations of the present study, it can be suggested that, to maintain the surface accuracy of the dental casts, slurry water immersion should be preferred instead of tap water immersion. [ABSTRACT FROM AUTHOR]

Copyright of Mersin Üniversitesi sağlık Bilimleri Dergisi is the property of Mersin University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this study, cutting speed (500, 600, 700 m/min), feed (0.1 and 0.15 mm/tooth), and depth of cut (1 and 8 mm) were used as parameters in the machining of AA2219-T851 and AA7475-T7351 alloys, and the effects of cutting parameters on surface roughness were investigated by using uncoated WC cutting tool and ZrN coated cutting tool. The surface roughness of the machined surfaces was investigated by surface profilometer. As a result of the machining operations, the cutting speed, feed, depth of cut, and cutting tool were determined at which the optimum surface quality was obtained. As a result, the surface results of two aluminum alloys that have different strengths were compared, and optimum machining parameters were found. The lowest surface roughness was obtained at 700 mm/min cutting speed, 0.1 mm/tooth, and 1 mm feed parameters, and as the feed rate increased, the surface quality increased and better surface properties were achieved by using ZrN-coated cutting tool. [ABSTRACT FROM AUTHOR]

Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Engineering & Architectural Faculty of Eskisehir Osmangazi University / Eskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi is the property of Eskisehir Osmangazi University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of the Institute of Science & Technology / Iğdır Üniversitesi Fen Bilimleri Enstitüsü Dergisi is the property of Igdir University, Institute of Science & Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ege University School of Dentistry / Ege Üniversitesi Dis Hekimligi Fakültesi Dergisi is the property of Ege University Faculty of Dentistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Surface roughness is an important factor affecting the product properties such as wear, adhesion, friction, leakage, fatigue, electrical and thermal contact resistance. Surface roughness of the machined parts manufactured by removing metal is a definite indicator of material structure, selected processing conditions and methods. Measuring surface roughness correctly and preferring the most suitable roughness measurement methods are regarded as a significant step in the researches performed. In this study, a precision tactile measurement profilometry and two optical type measurement instruments which are the techniques used predominantly nowadays were compared with each other in order to measure and inspect the roughness. In this experimental study, fifteen pieces of workpiece with flat surfaces manufactured by various conventional machining processes (turning, milling, grinding etc.) were measured under the same measurement conditions. Surface roughness analysis of the engineering surfaces were carried out with a stylus type profilometer and Data of all roughness parameters obtained from the contact and the non-contact measurement instruments for each test have been analysed by using SPSS 15 (Statistical Package for Social Science) statistically and developing mathematical models for the two most important and commonly used roughness parameters Ra and Rz so that Rz=R, (F, P, C) and Ra = Ra (F, P, C, M), whereas F expresses feed, P periodicity, C contrast und M the type of material. The precise measurement and evaluation processes of this study have been carried out at Vienna University of Technology, Interchangeable Manufacturing and Industrial Metrology, Nanometrology Laboratory. [ABSTRACT FROM AUTHOR]

Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of SDU Journal of Health Science Institute / SDÜ Saglik Bilimleri Enstitüsü Dergisi is the property of Suleyman Demirel University, Health Sciences Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of SDU Journal of Health Science Institute / SDÜ Saglik Bilimleri Enstitüsü Dergisi is the property of Suleyman Demirel University, Health Sciences Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Ege University School of Dentistry / Ege Üniversitesi Dis Hekimligi Fakültesi Dergisi is the property of Ege University Faculty of Dentistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

St37 steel is a frequently preferred material in many structural elements. Parts with low surface roughness values are preferred in terms of fatigue, wear, and corrosion. Since the experimental determination of surface roughness is timeconsuming and costly, these situations can be eliminated by predicting the surface roughness with machine learning methods. In this study, St37 steel was machined in different parameters on a CNC lathe. The surface roughness (Ra, µm) of the experimental samples was measured separately for different process parameters with a profilometer, and 72 different data were obtained. The experimental values obtained were modeled using support vector regression (SVR). The SVR is modeled using two different core functions. These are linear and Gaussian kernel functions. Two different conditions (dry and wet conditions), spindle speed (rpm) and feed rate (mm/rev) were used as input parameters in the models. The output parameter is the surface roughness (Ra, µm). As a result of the designed models, it has been seen that the SVR using the Gaussian kernel function performs better. In this model, the R-square value was obtained as 0.8876, while it was obtained as 0.7231 in the DVR with linear function. Time, material, and cost losses can be reduced by using the SVR with Gaussian core function in industries producing parts from St37 steel by turning. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Polytechnic is the property of Journal of Polytechnic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Acta Odontologica Turcica is the property of Acta Odontologica Turcica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Researches on improving osseointegration which is defined as a direct bond formation between living bone and implant and reducing bacterial growth on the material, are still among the studies that engage scientists' attention. While hydroxyapatite coating is one of the most widely used approaches to increase osseointegration, methods used to reduce bacterial growth vary. One of these methods is to form a copper-doped hydroxyapatite layer on the implant, which is known to be antibacterial. In this study, a copper oxide-containing hydroxyapatite thin film layer (HA/CuO) was formed on the surface of 316L stainless steel by using pulsed laser deposition (PLD). Dry sliding wear behaviour and corrosion behaviour of untreated and coated samples were comparatively investigated in phosphate buffer saline (PBS) and simulated body fluid (SBF) after coating. Structural characterizations were examined with scanning electron microscope (SEM), X-ray diffraction (XRD) and 3D profilometer. [ABSTRACT FROM AUTHOR]

The aim of this study is to investigate the wear behavior of pure titanium (cp-Ti), Ti-5Zr and Ti-10Zr alloys which are preferred as biomaterials in human body in 30° lower jaw movement chewing test experiments. The surface hardness values of the test specimens were determined before the wear test. Then, the test specimens were subjected to 120 000 wear cycles (70 N wear force, 0.7 mm lower jaw movement, 1.8 Hz wear frequency 3000 thermal cycles and 6 mm diameter ceramic abrasive antagonist material) using a computer-controlled chewing simulation device. Microstructure analyzes of the test samples were performed with scanning electron microscopy (SEM). In addition, wear volume loss of test specimen abrasion area obtained using non-contact 3D profilometer. As a result of this study, it was observed that the hardness value of the alloy increased with increasing ratio of zirconium element in titanium. It has also been observed that the alloy of the element zirconium increases the wear resistance. [ABSTRACT FROM AUTHOR]

Background: This study aimed to compare the effect of the surface treatment and toothbrushing abrasion on the surface roughness of interim crown material specimens manufactured using conventional, subtractive, and additive processing techniques. Material and methods: 80 disk-shaped specimens were prepared from 4 different interim crown materials; one auto-polymerized polymethyl methacrylate resin (PMMA);(IM) and one bis-acryl composite resin;(AC) for conventional technique, one computer-aided design/computer-aided manufacturing (CAD-CAM) PMMA block;(TC) for subtractive process, one 3-dimensionally (3D) printed resin;(CB) for additive process. Specimens of each interim crown material were divided into two subgroups according to applied surface treatments; conventional polishing or surface sealant agent coupling (n=10). The surface roughness values of specimens before (Ra0) and after 10,000 cycles of toothbrushing (Ra1) were measured with a profilometer. Data were statistically analyzed. Results: The polished groups of all interim crown materials showed significantly higher Ra0 values compared to the sealant groups before toothbrushing (p˂0.05). While the polished IM groups exhibited the highest Ra0 value (0.44±0.08), the sealed TC groups exhibited the lowest Ra0 value (0.23±0.06). The Ra values of all material groups increased after simulated 1-year toothbrushing. While the polished IM group exhibited the highest Ra1 value (0.45±0.14), the sealed CB group had the lowest Ra1 value (0.31±0.09). Conclusion: It was observed that toothbrushing caused an increase in the surface roughness of all interim materials. The application of a surface sealant agent to these materials is more effective than polishing to reduce surface roughness. Sealed 3D printed resin for additive process exhibited the lowest mean roughness value after toothbrushing. Keywords: Additive Manufactured, Interim Crown Material, Roughness, Subtractive Manufactured, Toothbrushing Abrasion

Copyright of Journal of Defense Sciences / Savunma Bilmleri Dergisi is the property of Turkish Military Academy Defense Sciences Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The mechanism behind n-type conductivity of undoped ZnO films are not understood well. One and two dimensional defects (grain boundaries, dislocations), and zero dimensional stoichiometric point defects (vacancies, self-interstitials and impurities) play a crucial role in determining the electrical properties of ZnO. All defect mechanisms are strongly controlled by the growth method and conditions. While it is more straightforward examining the one and two dimensional defects, measuring and unveiling the mechanism behind the zero dimensional point defect contribution and their sole effect on the electrical properties are challenging. This is why there has been controversial discussion of results among experimental and computational works relating physical and chemical properties of ZnO to sustainable electrical properties. In this study, to correlate the dynamics in between structural and electrical properties of ZnO grown by thermal ALD; growth temperature, DEZ and DI water precursor pulse times, DEZ/DI water precursor pulse ratio, and N2 purge time were varied. To obtain growth condition specific structural and electrical properties; XRD, AFM, profilometer, ellipsometry, XPS/CasaXPS, UV-VIS spectrometer, Hall-Effect measurements were utilized. Although, there was no strong correlation for oxygen vacancies, the contribution of hydrogen impurities, zinc interstitials and oxygen vacancies to conductivity was observed at different growth conditions. Lowest resistivity and highest average % transmittance were obtained as 6.8x10-3 ohm.cm and 92% in visible spectrum (380-700 nm), respectively.

Copyright of Journal of Polytechnic is the property of Journal of Polytechnic and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Antropoloji is the property of Ankara University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Wood preservation plays a vital role in maintaining wood products' structural and aesthetic properties. Traditional methods, including chemical treatments, preservatives, and coatings, have been utilized for wood protection, but sustainable alternatives are sought due to their negative environmental and health impacts. The utilization of nanomaterials presents a promising avenue for wood protection. In this study, nanoparticles were applied to lignocellulosic materials using the impregnation method to enhance solid wood’s water and fire resistance without needing additional energy. This research aimed to identify a cost-effective and energy-efficient approach for large-scale wood production while introducing innovative and competitive materials in the wood industry. Surface modification and characterization analyses, including SEM-EDX and Optical Profilometer studies, TGA-DTA analysis for thermal strength assessment, % water uptake test for water resistance evaluation, and PCE-CSM 10 spectrophotometer measurements to determine color change parameters, were conducted. Functionalized wood surfaces treated with zinc oxide (ZnO), chitosan (Ch), and tin dioxide (SnO2) nanoparticles exhibited water uptake values of 64%, 71%, and 73%, respectively. Following the salinization process using TEOS, the water uptake values decreased to 58%, 59%, and 60% for the respective surfaces. Based on the TGA and DTA results, the W-ZnO-TEOS sample demonstrated superior mass protection, with a significant weight loss of 62.1% (5.717 mg) at 340-375°C and 14.4% (1.328 mg) at 381-439°C. This was followed by the W-SnO2-TEOS sample, which exhibited a weight loss of 46.3% (7.050 mg) at 301-353°C and 15.4% (2.345 mg) at 431-469°C. The W-Ch-TEOS sample displayed a weight loss of 66.4% (8.242 mg) at 342-365°C and 18.8% (2.335 mg) at 448-476°C. Overall, the W-SnO2-TEOS sample demonstrated the highest water resistance, while the W-ZnO-TEOS sample exhibited the most effective fire protection capabilities.

Each passing day, materials are produced with different compositions by the method of powder metallurgy. The machinability of the produced materials is as important as the mechanical and chemical properties. In aforesaid article, cutting force variations, tool wear, surface roughness and burr formation during the micro milling of W-Cu alloys in different content sintered at 2 different temperatures were investigated. Significant amount of characterization study has been done and different measuring systems (like dynamometer, SEM, roughness measurement, surface profilometer) and software are used. The effect of the selected sintering temperatures on the microstructure are shown by SEM photographs, and then, effects of these temperatures on cutting force, tool wear, surface roughness and burr formation, which are caused by compositions with different Cu contents, are discussed. According to the obtained results, high sintering temperature and high tungsten ratio have been increased hardness values of samples. For this reason, tool wear in micro milling of W-%10wtCu sample sintered at 1100ºC is the maximum level. In addition, the sintering temperature and tungsten ratio significantly affect the cutting forces and surface roughness. As a result of abrasive wear mechanism, deterioration in tool geometry causes increasing of cutting forces, deterioration of surface quality and burr formation. [ABSTRACT FROM AUTHOR]

Copyright of Current Research in Dental Sciences is the property of Ataturk University Coordinatorship of Scientific Journals and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Afyon Kocatepe University Journal of Science & Engineering / Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi is the property of Afyon Kocatepe University, Faculty of Science & Literature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sample preparation is one of the main steps in metallographic examinations and the sample preparation processes give rise to changes in the determination of volume fraction of any phases can cause failure at the interpretation of a study. In this study, the effect of applied load during the metallographic sample preparation process on the volume fraction of retained austenite of the quenched AISI 52100 was investigated. Metallographic examination samples were prepared under different loads (20N, 40N, 80N, 100N) were examined by optical and SEM microscopes. The retained austenite volume fraction was calculated by the direct comparison method from the XRD analysis. Surface roughness was determined via a profilometer in order to reveal the effect of surface roughness on XRD patterns. Hardness measurements were performed to determine the probability of applied load that may transform retained austenite into martensite and rise in macro hardness after this transformation. No significant phase transformation was observed in the retained austenite phase volume fraction of metallographic examination samples prepared under different loads on retained austenite volume fraction measurements by the XRD method and. It is thought that a large amount of martensite volume fraction applies compressive stress on the retained austenite owing to low retained austenite volume fraction (

Fused Deposition Modeling (FDM) is one of the additive manufacturing (AM) methods, widely used for manufacturing prototypes, models and functional thermoplastic parts as final product. Although FDM technology provides opportunity for manufacturing complex geometries, surface quality of the products cannot reach the required value yet. For this reason post processing operations which are time consuming and over costing, are applied to the finished parts. Alternatively, optimization of the FDM process parameters is another solution which is more economical way for improving surface quality of the printed parts. The aim of the study is to optimize the FDM process parameters such as shell number, infill percentage, infill geometry and layer thickness, for improving surface quality of the Polylactic Acid (PLA) parts. L9 (34) standard Taguchi experimental design is applied for manufacturing of the samples. The manufactured surfaces are inspected by mechanical profilometer for obtaining 2D surface profiles and the results were transformed in to signal-to-noise ratio as a quality characteristic to measure the deviation from desired values. Analysis of variance (ANOVA) was used for determining significance of the testing parameters.

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Objective: The aim of this in vitro study was to evaluate the surface roughness of esthetic composite resins finished and polished with 2 different one-step polishing systems and a conventional multi-step disc system. Materials and Method: The evaluated composite resins were: Filtek Ultimate (3M ESPE), Amaris (Voco) and Esthet-X HD (Dentsply). A total of 120 specimens were fabricated in a plexiglass mold covered with a mylar strip. After polymerization, ten specimens per group received no polishing treatment and served as the control group. For each composite resin group (n=30), the specimens were randomly divided into three polishing systems: Enhance (one-step; Dentsply), OptraPol (one-step; Ivoclar Vivadent) and Sof-Lex (multiple-steps; 3M ESPE). All polishing systems were applied according to the manufacturers' instructions. The surface roughness values were determined using a profilometer. Data were analyzed using One-way ANOVA and post hoc Tukey tests (α=0.05). Results: The smoothest surfaces were achieved under mylar strips in all composite resin groups (p=0.00) except for Esthet-X HD. For Esthet-X HD, OptraPol exhibited similar roughness values with the control group. For Filtek Ultimate, Sof-Lex exhibited statistically greater surface roughness values compared to other polishing systems (p=0.00). However, in Amaris groups there were no statistically significant differences between the polishing systems (p=0.998). Conclusion: Surface roughness values differ between composite resin materials. For polishing esthetic composite resins, one-step polishing systems may exhibit comparable results with multi-step system.

Copyright of Sakarya University Journal of Science (SAUJS) / Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi is the property of Sakarya University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of ITU Journal Series D: Engineering is the property of Istanbul Technical University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)