Journal of Boron最新文献_第6页

Bazı ester kompleks sentezlerinde kullanılacak borik asit, monoetilen glikol ve gliserol moleküllerinin kuramsal olarak incelenmesi

Journal of Boron Pub Date : 2021-05-10 DOI: 10.30728/boron.894787

Cihat Hilal, Müşerref Önal

引用次数: 0

The synthesis of NiO@ N-doped reduced graphene oxide and its application for hydrogen generation NiO@ n掺杂还原氧化石墨烯的合成及其在制氢中的应用

Journal of Boron Pub Date : 2021-05-10 DOI: 10.30728/boron.840655

Derya Öncel

引用次数: 1

Bakır oksit ince filmlere bor katkısının metil mavisi üzerindeki fotokatalitik etkisinin araştırılması

Journal of Boron Pub Date : 2021-04-20 DOI: 10.30728/boron.797645

Süleyman Kerli, Mustafa Kavgaci

引用次数: 0

A Comparative Study on the Effect of Acute Toxicity of Nano and Micro Boron Particles in Lemna minor (Linneaus 1753) 纳米和微硼颗粒对小Lemna急性毒性作用的比较研究(Linneaus 1753)

Journal of Boron Pub Date : 2021-04-04 DOI: 10.30728/boron.727172

Y. Dağlıoğlu, Sevda Türkiş

引用次数: 1

Bone Cement Formulation with Reduced Heating of Bone Cement Resin 减少骨水泥树脂加热的骨水泥配方

Journal of Boron Pub Date : 2021-04-04 DOI: 10.30728/boron.835919

M. Seydibeyoğlu, Müşerref Caka, Fulden Ulucan-Karnak, Günnur Onak, A. Uzel, F. Özyildiz, O. Karaman

{"title":"Bone Cement Formulation with Reduced Heating of Bone Cement Resin","authors":"M. Seydibeyoğlu, Müşerref Caka, Fulden Ulucan-Karnak, Günnur Onak, A. Uzel, F. Özyildiz, O. Karaman","doi":"10.30728/boron.835919","DOIUrl":"https://doi.org/10.30728/boron.835919","url":null,"abstract":"Bone cement material is one of the key materials in bone surgery and orthopedic medicine. In this study, commercial polymethyl-methacrylate bone cement was mixed with boric acid and zinc borate to reduce the reaction temperature of the bone cement. The observation of temperature changes during the polymerization using laser thermometer and thermal camera showed that the use of boron compounds decreased the temperature of the bone cement at least 10°C which is very critical for the biomaterial uses as it affects the biocompatibility of the material. Besides temperature monitoring, microbiological tests showed that the materials have certain antibacterial effect. Water contact angle studies also supported the biocompatibility studies. In the last part, mechanical tests showed that there was not significant change in the tensile strength and tensile modulus values. Antibacterial tests exhibited thatzinc borate addition shows antimicrobial activity against S.epidermidis as well as boric acid addition over 5% concentration. According to the cell culture studies, boric acid can be interpreted as non-toxic up to 10%, while 10% and 20% zinc borate has toxic effect. This is the first study to use boron compounds in bone cement and it is proved that boric acid at low concentrations can be used for bone cement applications but zinc borate would not be suitable to use in medical applications due to toxic effects. BOR ISSN","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114534646","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}

引用次数: 0

Investigation of the effects of colemanite addition on the crystallization behaviour of cordierite glass-ceramics colemanite的加入对堇青石微晶玻璃结晶行为影响的研究

Journal of Boron Pub Date : 2021-02-11 DOI: 10.30728/BORON.702171

A. Evcin, S. Akpınar

{"title":"Investigation of the effects of colemanite addition on the crystallization behaviour of cordierite glass-ceramics","authors":"A. Evcin, S. Akpınar","doi":"10.30728/BORON.702171","DOIUrl":"https://doi.org/10.30728/BORON.702171","url":null,"abstract":"ani soğutma ile cam yapı elde öğütme işlemlerinden geçirilerek elde edilen cam tozların termal analiz tekniği ile camsı geçiş (T g ) ve kristalizasyon (T c ) sıcaklıkları belirlenmiştir. 1000°C’de yapılan sinterleme sonrasında cam-seramik faz yapısındaki değişimler incelenmiştir. ABSTRACT Cordierite based glass-ceramics are engineering materials with high thermal resistance properties, as well as low dielectric constant and low thermal expansion coefficient. Cordierite glass-ceramics can be produced at low costs and have good electrical properties. They can be used as a substrate instead of alumina in the electronics sector, as well as an alternative material in the production of multilayer circuit boards, catalytic converters, and thermal insulation materials. Since cordierite based glasses have a narrow sintering temperature range and high viscosity, it is difficult for them to be crystallized below 1000°C without a nucleation catalyst. For the production of low temperature and high-density glass-ceramics, it is crucial to select the additives (ZrO 2 , TiO 2 , CeO 2 , Y 2 O 3 , CaO, ZnO, P 2 O 5 , B 2 O 3 , etc.) and their amounts that have the fluxing properties that reduce viscosity and provide nucleation. In this study, the effects of colemanite addition on the crystallization ability after vitrification of mixtures prepared in a composition suitable for cordierite stoichiometry were investigated. Colemanite at 0, 1, 2 and 3% wt. ratios were added to the mixtures of magnesia, kaolin, and quartz raw materials were melted at 1500°C in industrial conditions, and then glass structure was obtained by sudden cooling. Glass transition (T g ) and crystallization (T c ) temperatures of glass powders obtained by crushing and grinding were determined by thermal analysis technique. The changes in the phase structure of glass-ceramic after sintering at 1000°C were examined.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132092913","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}

引用次数: 0

The role of B2O3 in lithium-zinc-calcium-silicate glass for improving the radiation shielding competencies B2O3在锂锌钙硅酸盐玻璃中提高辐射屏蔽性能的作用

Journal of Boron Pub Date : 2021-01-28 DOI: 10.30728/BORON.841726

R. Kurtuluş, T. Kavas

{"title":"The role of B2O3 in lithium-zinc-calcium-silicate glass for improving the radiation shielding competencies","authors":"R. Kurtuluş, T. Kavas","doi":"10.30728/BORON.841726","DOIUrl":"https://doi.org/10.30728/BORON.841726","url":null,"abstract":"In this study, a preliminary theoretical investigation on lithium-zinc-calcium-silicate (LZCS) glass with a composition of (15-x)Li2O-10ZnO-10CaO-65SiO2-xB2O3 where x: 0, 3, 6, 9, 12, and 15 mol% was performed to understand the effect of B2O3 on physical, optical, and radiation shielding properties. For this purpose, the L15B0 to L0B15 glass series was designed for evaluating glass density (ρglass), refractive index (n), mass attenuation coefficient (μm), and half-value layer (Δ0.5) parameters. The theoretical calculations showed that the increasing amount of B2O3 increased the overall ρglass from 2.9195 to 2.9865 g/cm3. Further, the addition of B2O3 in substitution for Li2O enhanced the n parameter from 1.6882 to 1.7626. Additionally, BatchMaker software aided to investigate viscosity behavior with the increasing temperature. We found out that the melting point of LZCS glass series ascends with the addition of B2O3, namely from 1309 to 1624 oC. On the other hand, the newly developed Phy-X/PSD software computations paved the way for ascertaining μm and Δ0.5. According to the μm computations, one can clearly state that an increasing trend is observable against the increasing photon energy, but the L0B15 possessed an enhanced shielding ability than that of the remaining at all photon energies. Moreover, we found out that the Δ0.5 increased with respect to the ascending photon energies, however, the Δ0.5 was effectively improved with the addition of B2O3 in the order of L0B15<L3B12<L6B9<L9B6<L12B3<L1 5B0. Lastly, a comparison for Δ0.5 variations between L0B15 and commercially available RS253 G18 evidently demonstrated that L0B15 achieves 4.11 cm while RS253 G18 fulfills 4.95 which in turn confirms that the proposed glass system can be utilized in radiation shielding applications. All in all, B2O3 has promising effects on radiation shielding features in LZCS glass series.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121633331","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}

引用次数: 4

Zinc Borate Chemical Garden and Zinc Borate Powders from Tincal Mineral and Zinc Sulfate Heptahydrate 硼酸锌化工园区和硼酸锌粉末从钛矿物和七水硫酸锌

Journal of Boron Pub Date : 2021-01-02 DOI: 10.30728/BORON.809041

F. Alp, M. Gönen, S. Savrık, D. Balköse

{"title":"Zinc Borate Chemical Garden and Zinc Borate Powders from Tincal Mineral and Zinc Sulfate Heptahydrate","authors":"F. Alp, M. Gönen, S. Savrık, D. Balköse","doi":"10.30728/BORON.809041","DOIUrl":"https://doi.org/10.30728/BORON.809041","url":null,"abstract":"The formation of the first membrane, the swelling of the crystal by incoming water from the semipermeable membrane and the formation of irregular shaped branches were observed by optical microscopy, when zinc sulfate heptahydrate crystals were immersed in saturated borax solution. The powders obtained by mixing dilute aqueous borax and zinc sulfate solutions had B, O, Na, S and Zn elements. Presence of Na Zn 1/2B4O7.xH2O was indicated by EDX analysis. The molar ratio of B 2O3/ZnO in powders was around 2. FTIR analysis indicated the ratio of absorbance values of asymmetric stretching vibrations of B(3)-O at 1351 cm-1 to that of B (4)-O at 1026 cm-1 increased with their heating time at 90oC during their preparation. X-ray diffraction patterns indicated the presence of Zn(OH)2 and Zn 4(OH)6(SO4)·4H2O. The zinc borate compounds in the powders were not crystalline since no sharp peaks related to zinc borates were present in x-ray diffraction diagram. There were two mass loss steps in TG curves of the powders. The first step at 150-350oC and the second step at 700-950oC were due to elimination of water and due to decomposition of sulfate ions respectively. The submicron powders were a mixture of zinc borate, Zn(OH)2, Zn4(OH)6(SO4)·4H2O and Na Zn 1/2B4O7.xH2O and they could be used as lubricant additive due to their small particle size of 600 nm.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"B4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126840565","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}

引用次数: 0

Boron doped Hydroxyapatites in Biomedical Applications 硼掺杂羟基磷灰石在生物医学中的应用

Journal of Boron Pub Date : 2020-12-29 DOI: 10.30728/boron.848356

Z. Evis

{"title":"Boron doped Hydroxyapatites in Biomedical Applications","authors":"Z. Evis","doi":"10.30728/boron.848356","DOIUrl":"https://doi.org/10.30728/boron.848356","url":null,"abstract":"Hydroxyapatite has been widely used in biomedical applications as a coating material for implant surfaces, a drug carrier, a scaffold or composite for bone tissue engineering applications. The highly ionic structure of hydroxyapatite allows doping of various ions, resulting in an improvement in its properties. Boron is one of the elements which can be doped into hydroxyapatite structure by replacing phosphate (PO43-) or hydroxyl (OH-) sites to obtain scaffolds for bone tissue engineering applications or a coating material for metal substrates. Although the effects of supplemental boron on bone, liver, and brain metabolism have been shown to have important results as a nutrient, there are very few studies in the literature on the use of boron-doped hydroxyapatite in the biomedical field. In this review, the details of synthesis methods and functional groups of boron-doped hydroxyapatite were tabulated. Generally, the addition of boron leads to the formation of rod-like morphology, while the density and Vicker’s microhardness of hydroxyapatite decrease. Thermal stability and electrical insulation properties were observed to improve with boron doping. Boron was also shown to increase biodegradability, bioactivity as well as cell proliferation and differentiation of different cell types on the surface of hydroxyapatite.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114710710","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}

引用次数: 1

INVESTIGATION OF MECHANICAL AND TRIBOLOGICAL CHARACTERISTICS OF Ni-B COATINGS DEPOSITED ON STEEL 钢表面Ni-B涂层的力学和摩擦学特性研究

Journal of Boron Pub Date : 2020-12-06 DOI: 10.30728/BORON.762584

F. Doğan, Erhan Duru, M. Uysal, H. Akbulut, S. Aslan

{"title":"INVESTIGATION OF MECHANICAL AND TRIBOLOGICAL CHARACTERISTICS OF Ni-B COATINGS DEPOSITED ON STEEL","authors":"F. Doğan, Erhan Duru, M. Uysal, H. Akbulut, S. Aslan","doi":"10.30728/BORON.762584","DOIUrl":"https://doi.org/10.30728/BORON.762584","url":null,"abstract":"In this study, mechanical properties and wear behaviors of Ni-B coatings were investigated. The mechanical and wear properties of the coating change depending on the nickel boride (Ni2B and Ni3B) phases formed after heat treatment at 400oC for 2 hours. Nodular structure formed in the surface morphology and columnar growth in the cross-sectional images of the coating as-deposited and annealed was examined by scanning electron microscopy (SEM). The amorphous structure at as-deposited and the nickel boride phases formed in the structure after annealing were analyzed by X-ray diffraction (XRD). Using the Debye-Scherrer formula, the effect of the phases formed in the structure on the crystalline grain size after annealing was calculated. The hardness values of the coating as-deposited and annealed were calculated by nano-indentation hardness measurement method. Wear tests of the coatings, which were subjected to heat treatment at 400oC for 2 h, were carried out in dry conditions without the use of lubricants, at different loads (1N-3N-5N), at a sliding speed of 25 mm/s and at 25oC. After the wear tests, the wear surfaces of the samples were imaged by SEM and their chemical compositions were analyzed by energy dispersive spectroscopy (EDS). The wear rate and coefficients of friction the samples tested under different loads had compared each other.","PeriodicalId":431027,"journal":{"name":"Journal of Boron","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123946069","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}

引用次数: 3