Buse Akkaya, Jiyan Aslan, Rukiye Taşdemi̇r, İlker Erdem, Mehmet Gönen
Colloidal silica is a stable and homogeneously dispersed form of amorphous silicon dioxide (SiO2) nanoparticles in water. Colloidal silica has been the focus of research due to large surface area, biocompatibility, low toxicity and chemical and thermal stability. It has been used in a wide variety of industrial applications, including pulp and paper, chromatography, electronics, foods, and colloids, as well as in the ceramics and glass industry. In this study, colloidal silica was produced using cationic resin and sodium silicate and process conditions were optimized. Temperature (50-80 °C), mixing speed (200-500 rpm) and time (20-120 min.), which significantly affect the particle size, were selected as parameters. Particle size distribution (PSD) analyzes of colloidal silica particles were performed to determine appropriate levels of the parameters. The most suitable process conditions are 50°C temperature, 40 min. and 300 rpm. The average particle size of colloidal silica produced in optimum conditions was measured as 80 nm.
{"title":"Colloidal Silica Production with Resin from Sodium Silicate and Optimization of Process","authors":"Buse Akkaya, Jiyan Aslan, Rukiye Taşdemi̇r, İlker Erdem, Mehmet Gönen","doi":"10.56171/ojn.1402531","DOIUrl":"https://doi.org/10.56171/ojn.1402531","url":null,"abstract":"Colloidal silica is a stable and homogeneously dispersed form of amorphous silicon dioxide (SiO2) nanoparticles in water. Colloidal silica has been the focus of research due to large surface area, biocompatibility, low toxicity and chemical and thermal stability. It has been used in a wide variety of industrial applications, including pulp and paper, chromatography, electronics, foods, and colloids, as well as in the ceramics and glass industry. In this study, colloidal silica was produced using cationic resin and sodium silicate and process conditions were optimized. Temperature (50-80 °C), mixing speed (200-500 rpm) and time (20-120 min.), which significantly affect the particle size, were selected as parameters. Particle size distribution (PSD) analyzes of colloidal silica particles were performed to determine appropriate levels of the parameters. The most suitable process conditions are 50°C temperature, 40 min. and 300 rpm. The average particle size of colloidal silica produced in optimum conditions was measured as 80 nm.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140516424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Silicone rubber is an organic/inorganic hybrid macromolecular polymer with properties such as fire resistance, strength, flexibility, chemical resistance, thermal stability, hydrophobicity, dielectric characteristics, resistance to environmental conditions, and biocompatibility. It is an elastomer and exhibits high-performance characteristics compared to most materials in its class. Its current properties and the relative ease of enhancing its characteristics have significantly increased the industrial utilization of silicone rubber. Due to its mineral structure, silicone rubber is frequently used as an insulating material to ensure circuit integrity in the production of fire-resistant cables. It exhibits low smoke zero halogen (LSZH) characteristics, with low level release of toxic gases as a result of combustion reactions. In this study, silicone rubber compounds including a natural mineral Huntite with improved fire-resistant properties compared to standard silicone materials suitable for cable production were prepared. After cable production the fire performance properties alongside the physico-mechanical characteristics of the final products were examined. To determine the flame retardancy of the material, limiting oxygen index (LOI%) and fire performance tests were performed according to the ISO 4589-2 and BS 6387 standards, respectively. The results show that Huntite is a suitable alternative material to improve silicone materials' flame resistance.
硅橡胶是一种有机/无机杂化高分子聚合物，具有耐火性、强度、柔韧性、耐化学性、热稳定性、疏水性、介电特性、耐环境条件和生物相容性等特性。它是一种弹性体，与大多数同类材料相比具有高性能特点。硅橡胶的现有特性和相对容易的增强特性大大提高了硅橡胶的工业利用率。由于其矿物结构，硅橡胶经常被用作绝缘材料，以确保耐火电缆生产中电路的完整性。硅橡胶具有低烟零卤（LSZH）的特性，燃烧反应释放的有毒气体较少。在这项研究中，制备了包括天然矿物 Huntite 在内的硅橡胶化合物，与标准硅橡胶材料相比，它具有更好的耐火性能，适用于电缆生产。电缆生产完成后，对最终产品的防火性能和物理机械特性进行了检测。为了确定材料的阻燃性，分别根据 ISO 4589-2 和 BS 6387 标准进行了极限氧指数（LOI%）和防火性能测试。结果表明，Huntite 是提高硅树脂材料阻燃性能的合适替代材料。
{"title":"Investigation of the Effect of Huntit Filler on Flame Retardancy and Mechanical Properties of Silicone Rubber-based Materials in Cable Applications","authors":"Halil Can Uğraşkan, Fatma Sevde Duman, S. Emik","doi":"10.56171/ojn.1400079","DOIUrl":"https://doi.org/10.56171/ojn.1400079","url":null,"abstract":"Silicone rubber is an organic/inorganic hybrid macromolecular polymer with properties such as fire resistance, strength, flexibility, chemical resistance, thermal stability, hydrophobicity, dielectric characteristics, resistance to environmental conditions, and biocompatibility. It is an elastomer and exhibits high-performance characteristics compared to most materials in its class. Its current properties and the relative ease of enhancing its characteristics have significantly increased the industrial utilization of silicone rubber. Due to its mineral structure, silicone rubber is frequently used as an insulating material to ensure circuit integrity in the production of fire-resistant cables. It exhibits low smoke zero halogen (LSZH) characteristics, with low level release of toxic gases as a result of combustion reactions. In this study, silicone rubber compounds including a natural mineral Huntite with improved fire-resistant properties compared to standard silicone materials suitable for cable production were prepared. After cable production the fire performance properties alongside the physico-mechanical characteristics of the final products were examined. To determine the flame retardancy of the material, limiting oxygen index (LOI%) and fire performance tests were performed according to the ISO 4589-2 and BS 6387 standards, respectively. The results show that Huntite is a suitable alternative material to improve silicone materials' flame resistance.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"22 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139174248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Öz – Bu kapsamlı çalışma, tane incelticilerin alüminyum alaşımlarının üzerindeki etkisini araştırmakta ve hem alaşım geliştirme hem de çeşitli endüstriyel uygulamalar için önemli çıkarımlar ortaya koymaktadır. Araştırmada, alüminyum levhalar üretmede hassasiyeti ve verimliliği ile tanınan ikiz merdaneli döküm metodundan yararlanılmıştır. İncelenen alaşımların kimyasal bileşiminin kesin olarak anlaşılması için spektrometrik analiz kullanılmıştır. Araştırma daha sonra Al-5Ti-0,2B ve Al-5Ti-1B olan iki farklı tane incelticili 1050 alüminyum alaşımının mikroyapı ve mekanik incelemesine girmektedir. Bu alaşımlar gelişmiş optik mikroskop ve SEM altında incelenmiş ve mekanik özelliklerinin bütünsel bir değerlendirmesini sağlamak için de sertlik analizi yapılmıştır. Sonuçlar, Al-5Ti-1B alaşımında daha fazla bulunan borun belirgin etkisini ortaya çıkarmıştır. Bu alaşımı SEM analizinde incelediğimizde intermetalik yapıların azaldığını ve daha homojen bir yapının ortaya çıktığı net bir şekilde görülmüştür. Bunun ile birlikte optik mikroskop görüntülerinde tane boyutlarının küçüldüğü ve daha tanecikli bir yapı oluşmasına sebebiyet vermesinin yanında akma, çekme ve sertlik değerinin artması Al-5Ti-1B alaşımının mikroyapı ve mekanik özelliklerindeki iyileşmelerin net bir göstergesi haline gelmiştir. Mikroyapıda elde edilen bu gelişmeler ile özellikle ikiz merdane döküm tekniği ile üretilen malzemelerde eloksallama yüzey işleminin uygulanabilirliğini ortaya koymuştur.
{"title":"Al-5Ti-0,2B ve Al-5Ti-1B Tane İncelticilerin AA 1050 Alüminyum Alaşımının Mekanik Özellikleri Üzerine Etkileri","authors":"Tuğçe Yunak, Erhan Duru, Samet Sevi̇nç, S. Aslan","doi":"10.56171/ojn.1395366","DOIUrl":"https://doi.org/10.56171/ojn.1395366","url":null,"abstract":"Öz – Bu kapsamlı çalışma, tane incelticilerin alüminyum alaşımlarının üzerindeki etkisini araştırmakta ve hem alaşım geliştirme hem de çeşitli endüstriyel uygulamalar için önemli çıkarımlar ortaya koymaktadır. Araştırmada, alüminyum levhalar üretmede hassasiyeti ve verimliliği ile tanınan ikiz merdaneli döküm metodundan yararlanılmıştır. İncelenen alaşımların kimyasal bileşiminin kesin olarak anlaşılması için spektrometrik analiz kullanılmıştır. Araştırma daha sonra Al-5Ti-0,2B ve Al-5Ti-1B olan iki farklı tane incelticili 1050 alüminyum alaşımının mikroyapı ve mekanik incelemesine girmektedir. Bu alaşımlar gelişmiş optik mikroskop ve SEM altında incelenmiş ve mekanik özelliklerinin bütünsel bir değerlendirmesini sağlamak için de sertlik analizi yapılmıştır. Sonuçlar, Al-5Ti-1B alaşımında daha fazla bulunan borun belirgin etkisini ortaya çıkarmıştır. Bu alaşımı SEM analizinde incelediğimizde intermetalik yapıların azaldığını ve daha homojen bir yapının ortaya çıktığı net bir şekilde görülmüştür. Bunun ile birlikte optik mikroskop görüntülerinde tane boyutlarının küçüldüğü ve daha tanecikli bir yapı oluşmasına sebebiyet vermesinin yanında akma, çekme ve sertlik değerinin artması Al-5Ti-1B alaşımının mikroyapı ve mekanik özelliklerindeki iyileşmelerin net bir göstergesi haline gelmiştir. Mikroyapıda elde edilen bu gelişmeler ile özellikle ikiz merdane döküm tekniği ile üretilen malzemelerde eloksallama yüzey işleminin uygulanabilirliğini ortaya koymuştur.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138985093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
İbrahim Usta, Oğuz Yilmaz, Minel Gül, Ahmet Can, Harun Gül
This study aims to improve the corrosion properties of iron materials used in the automotive industry. For this purpose, two different coating techniques were applied to the same surface. As part of the research, different passivation processes (transparent, blue, yellow, and black) were applied to alkaline Zn-Ni coatings. Geomet 321 and Geomet ML Black coatings were deposited on the passivation layer to form a double-layer coating. In order to investigate the adhesion and corrosion effects of these coatings, a dry adhesion test, a water test, a humidity test, and a salt spray/spray test were carried out, and cross-cut adhesion tests were carried out after each corrosion test. After all these tests, rust formation was analyzed by visual analysis, and atomic weight percentages and coating thicknesses were examined by X-ray. Geomet 321 and ML Black coatings, which were tested using different passivation processes, successfully passed. The transparent passivation after the Zn-Ni coating fully satisfied both adhesion and corrosion protection requirements for the 321 and ML Black coatings. No red rust formation was observed on the coating samples after the test; only partial white rust formation was observed, and no peeling of the coating layer was detected in the adhesion tests. As a result, the most favorable results were obtained for the transparent, blue, and black passivated coatings.
本研究旨在改善汽车行业所用铁材料的腐蚀性能。为此，对同一表面采用了两种不同的涂层技术。作为研究的一部分，在碱性 Zn-Ni 涂层上采用了不同的钝化工艺（透明、蓝色、黄色和黑色）。Geomet 321 和 Geomet ML 黑色涂层沉积在钝化层上，形成双层涂层。为了研究这些涂层的附着力和腐蚀效果，进行了干附着力试验、水试验、湿度试验和盐雾/喷雾试验，并在每次腐蚀试验后进行了横切附着力试验。在所有这些试验之后，通过目测分析锈蚀形成情况，并通过 X 射线检查原子重量百分比和涂层厚度。使用不同钝化工艺测试的 Geomet 321 和 ML Black 涂层都顺利通过了测试。Zn-Ni 涂层后的透明钝化完全满足 321 和 ML Black 涂层的附着力和防腐蚀要求。测试后，涂层样品上未观察到红色锈迹的形成，仅观察到部分白色锈迹的形成，并且在附着力测试中未发现涂层剥落。因此，透明、蓝色和黑色钝化涂层的测试结果最为理想。
{"title":"Effect of Different Passivation Treatments on Alkali Zn-Ni Coatings: Corrosion Resistance and Adhesion Performance of Geomet 321 and ML Black Coatings","authors":"İbrahim Usta, Oğuz Yilmaz, Minel Gül, Ahmet Can, Harun Gül","doi":"10.56171/ojn.1363454","DOIUrl":"https://doi.org/10.56171/ojn.1363454","url":null,"abstract":"This study aims to improve the corrosion properties of iron materials used in the automotive industry. For this purpose, two different coating techniques were applied to the same surface. As part of the research, different passivation processes (transparent, blue, yellow, and black) were applied to alkaline Zn-Ni coatings. Geomet 321 and Geomet ML Black coatings were deposited on the passivation layer to form a double-layer coating. In order to investigate the adhesion and corrosion effects of these coatings, a dry adhesion test, a water test, a humidity test, and a salt spray/spray test were carried out, and cross-cut adhesion tests were carried out after each corrosion test. After all these tests, rust formation was analyzed by visual analysis, and atomic weight percentages and coating thicknesses were examined by X-ray. Geomet 321 and ML Black coatings, which were tested using different passivation processes, successfully passed. The transparent passivation after the Zn-Ni coating fully satisfied both adhesion and corrosion protection requirements for the 321 and ML Black coatings. No red rust formation was observed on the coating samples after the test; only partial white rust formation was observed, and no peeling of the coating layer was detected in the adhesion tests. As a result, the most favorable results were obtained for the transparent, blue, and black passivated coatings.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"2011 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139276831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Textile dyeing wastewater involving resistant dyestuffs contaminate rivers because of their color and the production of hazardous or carcinogenic intermediates, which must be removed before being released into streams. The ligninolytic enzymes have many uses, including the elimination of dyestuffs from industrial wastewater. In this study, the Lignin Peroxidase enzyme was used to eliminate synthetic solutions of Naphthol Blue Black (NBB) and Remazol Brilliant Blue R (RBBR) dyestuffs at pH 5.0 and 30 °C. In addition, the effect of 1-hydroxybenzotriazole (HOBt), a redox mediator, on dye removal at different concentrations was investigated. Once a redox mediator was added to the LiP enzyme, the percentage of RBBR dye eliminated increased from 10% to 26% after 24 hours. On the first day after adding HOBt to the LiP enzyme, the percentage of NBB dye eliminated increased from 5% to 89%. The effect of HOBt was significantly greater in the NBB than in the RBBR. The redox mediator-added Lignin Peroxidase enzyme decolorized the NBB dye more efficiently than the RBBR dye.
{"title":"The Effect of 1-hydroxybenzotriazole on the Decolorization of Anthraquinone and Diazo Dyes Using Peroxidase Enzyme","authors":"Mithat Çelebi, M. Altikatoğlu","doi":"10.56171/ojn.1364230","DOIUrl":"https://doi.org/10.56171/ojn.1364230","url":null,"abstract":"Textile dyeing wastewater involving resistant dyestuffs contaminate rivers because of their color and the production of hazardous or carcinogenic intermediates, which must be removed before being released into streams. The ligninolytic enzymes have many uses, including the elimination of dyestuffs from industrial wastewater. In this study, the Lignin Peroxidase enzyme was used to eliminate synthetic solutions of Naphthol Blue Black (NBB) and Remazol Brilliant Blue R (RBBR) dyestuffs at pH 5.0 and 30 °C. In addition, the effect of 1-hydroxybenzotriazole (HOBt), a redox mediator, on dye removal at different concentrations was investigated. Once a redox mediator was added to the LiP enzyme, the percentage of RBBR dye eliminated increased from 10% to 26% after 24 hours. On the first day after adding HOBt to the LiP enzyme, the percentage of NBB dye eliminated increased from 5% to 89%. The effect of HOBt was significantly greater in the NBB than in the RBBR. The redox mediator-added Lignin Peroxidase enzyme decolorized the NBB dye more efficiently than the RBBR dye.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"1134 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139288776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Liquid crystals, which are between the solid state of matter and the liquid state, are materials with interesting molecular structures. They are molecular materials that show both the properties of solid crystals and the properties of liquids. Materials whose physical properties change depending on the particle size, whose dimensions are at the nanometer level, are nanoparticles. Nanoparticles can be produced in many different types, depending on their size and structural shape. We obtained fluorescence graphs by combining liquid crystals and nanoparticles in solvents with three different characteristics. The liquid crystals we used in this study are 4-Pentylphenyl 4-Methoxybenzoate (4PP4MetoxB), 4-Pentylphenyl 4-Pentylbenzote (4PP4PentB), and 4-Pentylphenyl 4-(Octyloxy)Benzoate (4PP4OctoxB). Other materials we use are ZnS, CdSe, and CdS nanoparticles. We created new materials by combining these liquid crystals and nanoparticles in solvents. We examined whether the liquid crystals and nanoparticles in the newly formed materials interact in solvents and how the fluorescence graphs change according to the fluorescence graphs of liquid crystals.
{"title":"Sıvı kristaller ve nanopartikül arasındaki etkileşimlerin belirlenmesi üzerine çalışma: Nanopartikül katkılı sıvı kristallerin floresan spektrumları","authors":"","doi":"10.56171/ojn.1225833","DOIUrl":"https://doi.org/10.56171/ojn.1225833","url":null,"abstract":"Liquid crystals, which are between the solid state of matter and the liquid state, are materials with interesting molecular structures. They are molecular materials that show both the properties of solid crystals and the properties of liquids. Materials whose physical properties change depending on the particle size, whose dimensions are at the nanometer level, are nanoparticles. Nanoparticles can be produced in many different types, depending on their size and structural shape. We obtained fluorescence graphs by combining liquid crystals and nanoparticles in solvents with three different characteristics. The liquid crystals we used in this study are 4-Pentylphenyl 4-Methoxybenzoate (4PP4MetoxB), 4-Pentylphenyl 4-Pentylbenzote (4PP4PentB), and 4-Pentylphenyl 4-(Octyloxy)Benzoate (4PP4OctoxB). Other materials we use are ZnS, CdSe, and CdS nanoparticles. We created new materials by combining these liquid crystals and nanoparticles in solvents. We examined whether the liquid crystals and nanoparticles in the newly formed materials interact in solvents and how the fluorescence graphs change according to the fluorescence graphs of liquid crystals.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115303891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Elif Aybike Berberoğlu, M. M. Koç, N. Kurnaz Yetim, Cemile Özcan
In this work, cobalt(II/III) oxide (Co3O4) nano/microflowers were practically synthesized in laboratory conditions. Adsorbence properties of the nanoflowers were investigated for the removal of cadmium and chromium heavy metal ions. To assess the chemical and morphological characteristics of Co3O4 nanoflowers, Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), field emission electron microscopy (FESEM), Energy dispersive spectroscopy (EDS), and was used. To determine the adsorbence mechanism in detail, eluent concentration, eluent type, solution pH, adsorbent amount, solution volume, and adsorption duration were studied. In these assessments, flame atomic absorption spectroscopy (FAAS) was used. For Cr6+, adsorption optimum parameters were determined as 3M HNO3, pH 6.5, 150mg, 30mL, 60min. For Cd2+, optimum parameters were determined as 3M HNO3, pH 6.0, 100mg, 10mL, 30min. Co3O4, nanoflowers are eco-friendly adsorbent materials for the adsorption of Cd6+ and Cd2+ heavy metal ions since the production method is affordable and practical.
{"title":"Sonochemical Removal of Highly Toxic Aqueous Cd2+ and Cr6+ Ions Using Dandelion-like Co3O4 Nanoflowers","authors":"Elif Aybike Berberoğlu, M. M. Koç, N. Kurnaz Yetim, Cemile Özcan","doi":"10.56171/ojn.1192105","DOIUrl":"https://doi.org/10.56171/ojn.1192105","url":null,"abstract":"In this work, cobalt(II/III) oxide (Co3O4) nano/microflowers were practically synthesized in laboratory conditions. Adsorbence properties of the nanoflowers were investigated for the removal of cadmium and chromium heavy metal ions. To assess the chemical and morphological characteristics of Co3O4 nanoflowers, Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), field emission electron microscopy (FESEM), Energy dispersive spectroscopy (EDS), and was used. To determine the adsorbence mechanism in detail, eluent concentration, eluent type, solution pH, adsorbent amount, solution volume, and adsorption duration were studied. In these assessments, flame atomic absorption spectroscopy (FAAS) was used. For Cr6+, adsorption optimum parameters were determined as 3M HNO3, pH 6.5, 150mg, 30mL, 60min. For Cd2+, optimum parameters were determined as 3M HNO3, pH 6.0, 100mg, 10mL, 30min. Co3O4, nanoflowers are eco-friendly adsorbent materials for the adsorption of Cd6+ and Cd2+ heavy metal ions since the production method is affordable and practical.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128458607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Midostaurin (C35H30N4O4), diğer kemoterapi ajanları ile birlikte bazı akut miyeloid lösemi tiplerini tedavi etmek için kullanılan multi-target kinaz inhibitörüdür. Biyoaktif bir molekülün biyoaktivitesini gösterdiği en kararlı konformerinin belirlenmesinin önemi dolayısıyla ilk olarak Midostaurin’in yapısal tercihleri bulunup değerlendirilmiştir. Midostaurin molekülünün konformasyonel analizi, yarı deneysel bir metot olan PM3 kullanılarak yapılmıştır. En kararlı üç konformer ve bunların bağıl enerjileri belirlenmiştir. Bütünleyici bir zar proteini olan Epitermal Büyüme faktörü reseptörü (EGFR) ve aşırı ekspresyonu, çok çeşitli tümörlerin gelişimi ile ilişkilidir. Bu nedenle, EGFR inhibitörleri, EGFR eksprese eden tümörlerin büyümesini önleyerek ve hastaların hayatta kalma oranlarını artırarak antikanser ilaçlar olarak işlev görebilir. Ek olarak, DNA antikanser ilaçlar için önemli bir hedeftir. Midostaurin’in antikanser özelliklerini aydınlatmak için EGFR ve DNA’ya karşı moleküler kenetlenme simülasyonları yapılmıştır. Ligand-hedef reseptör komplekslerinin bağlanma modları ve bağlanma afiniteleri belirlenmiştir. Midostaurin, DNA (ΔG = -8.6 kcal/mol) ve EGFR (ΔG = - 9.6 kcal/mol) ile güçlü bağlanma afinitesi göstermiştir. Sonuçlar, Midostaurin'in önemli anti-tümör etkisini ortaya çıkarmıştır.
{"title":"Miyeloid Lösemi Tedavisinde Etkili Bir İlaç Olan Midostaurinin Moleküler Kenetlenme Çalışması","authors":"Sefa Celik, Gözde Yılmaz, A. Özel, Sevim Akyüz","doi":"10.56171/ojn.1102513","DOIUrl":"https://doi.org/10.56171/ojn.1102513","url":null,"abstract":"Midostaurin (C35H30N4O4), diğer kemoterapi ajanları ile birlikte bazı akut miyeloid lösemi tiplerini tedavi etmek için kullanılan multi-target kinaz inhibitörüdür. Biyoaktif bir molekülün biyoaktivitesini gösterdiği en kararlı konformerinin belirlenmesinin önemi dolayısıyla ilk olarak Midostaurin’in yapısal tercihleri bulunup değerlendirilmiştir. Midostaurin molekülünün konformasyonel analizi, yarı deneysel bir metot olan PM3 kullanılarak yapılmıştır. En kararlı üç konformer ve bunların bağıl enerjileri belirlenmiştir. Bütünleyici bir zar proteini olan Epitermal Büyüme faktörü reseptörü (EGFR) ve aşırı ekspresyonu, çok çeşitli tümörlerin gelişimi ile ilişkilidir. Bu nedenle, EGFR inhibitörleri, EGFR eksprese eden tümörlerin büyümesini önleyerek ve hastaların hayatta kalma oranlarını artırarak antikanser ilaçlar olarak işlev görebilir. Ek olarak, DNA antikanser ilaçlar için önemli bir hedeftir. Midostaurin’in antikanser özelliklerini aydınlatmak için EGFR ve DNA’ya karşı moleküler kenetlenme simülasyonları yapılmıştır. Ligand-hedef reseptör komplekslerinin bağlanma modları ve bağlanma afiniteleri belirlenmiştir. Midostaurin, DNA (ΔG = -8.6 kcal/mol) ve EGFR (ΔG = - 9.6 kcal/mol) ile güçlü bağlanma afinitesi göstermiştir. Sonuçlar, Midostaurin'in önemli anti-tümör etkisini ortaya çıkarmıştır.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"407 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125259518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study was carried out on turnip (avtitu) obtained from a radish ecotype grown in Eruh region of Siirt. Antioxidant capacities, total phenolic and flavonoid amounts of DPPH (free radical scavenging), Ferric ion reducing antioxidant power (FRAP) analyses were performed in extracts obtained from radish with different solvents. In addition, the metal content of the samples and the elemental analysis of the soil samples taken in the area where they were collected were made. In this study, the content of total phenolic, total flavonoid, DPPH highest % inhibition values and the highest values of the ferric ion reducing antioxidant power (FRAP) were 71.97 ± 14.54 mg / mL Gallic acid equivalents, 298.17 ± 12.81 mg / mL routine equivalent, 66.88% and 3.29 ± 0.01 mg / mL FeSO4 equivalents were detected in the aboveground fractions methanol extract, respectively. Samples of the turnip beverage traditionally produced by the people from the Eruh region of Siirt were randomly obtained from eleven families. Some physicochemical tests such as pH, water activity, Oxidation-Reduction (O / R; Eh) Potential Value, colour analysis, dry matter content and % salt ratio and microbiological tests such as TMAB, yeast, mould, Staphylococcus species, Lactobacillus spp., coliform group bacteria and E. coli were applied to these avtitu samples.
{"title":"Determination of Metal Content and Biological Activities of Radish Plant Consumed as Turnip by Public in Siirt Region","authors":"İ. Teği̇n, Bülent Hallaç, Hasan Özden, M. Fidan","doi":"10.56171/ojn.1035703","DOIUrl":"https://doi.org/10.56171/ojn.1035703","url":null,"abstract":"This study was carried out on turnip (avtitu) obtained from a radish ecotype grown in Eruh region of Siirt. Antioxidant capacities, total phenolic and flavonoid amounts of DPPH (free radical scavenging), Ferric ion reducing antioxidant power (FRAP) analyses were performed in extracts obtained from radish with different solvents. In addition, the metal content of the samples and the elemental analysis of the soil samples taken in the area where they were collected were made. In this study, the content of total phenolic, total flavonoid, DPPH highest % inhibition values and the highest values of the ferric ion reducing antioxidant power (FRAP) were 71.97 ± 14.54 mg / mL Gallic acid equivalents, 298.17 ± 12.81 mg / mL routine equivalent, 66.88% and 3.29 ± 0.01 mg / mL FeSO4 equivalents were detected in the aboveground fractions methanol extract, respectively. Samples of the turnip beverage traditionally produced by the people from the Eruh region of Siirt were randomly obtained from eleven families. Some physicochemical tests such as pH, water activity, Oxidation-Reduction (O / R; Eh) Potential Value, colour analysis, dry matter content and % salt ratio and microbiological tests such as TMAB, yeast, mould, Staphylococcus species, Lactobacillus spp., coliform group bacteria and E. coli were applied to these avtitu samples.","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133592746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimization of Cutting Parameters Affecting Cutting Force and Surface Roughness in Machining of AISI P20 Die Steel","authors":"Mahir Akgün, Barış Özlü","doi":"10.56171/ojn.1039567","DOIUrl":"https://doi.org/10.56171/ojn.1039567","url":null,"abstract":"","PeriodicalId":448411,"journal":{"name":"Open Journal of Nano","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129594956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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