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International Journal of Nano and Biomaterials最新文献

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Development of self-assembled polygalacturonic acid-peptide composites and their interactions with mesenchymal stem cells for potential applications in tendon tissue engineering 自组装聚半乳糖醛酸-肽复合物及其与间充质干细胞的相互作用在肌腱组织工程中的潜在应用
International Journal of Nano and Biomaterials Pub Date : 2019-01-31 DOI: 10.1504/IJNBM.2019.10018706
Grant A. Knoll, Harrison T. Pajovich, Steven M. Romanelli, I. Banerjee
{"title":"Development of self-assembled polygalacturonic acid-peptide composites and their interactions with mesenchymal stem cells for potential applications in tendon tissue engineering","authors":"Grant A. Knoll, Harrison T. Pajovich, Steven M. Romanelli, I. Banerjee","doi":"10.1504/IJNBM.2019.10018706","DOIUrl":"https://doi.org/10.1504/IJNBM.2019.10018706","url":null,"abstract":"We have developed a new biomimetic scaffold for potential applications in tendon tissue engineering (TE). The scaffold template was synthesised by conjugating polygalacturonic acid with the dipeptide leucyl-leucine to mimic the leucine rich proteoglycans found in the extracellular matrix (ECM) of tenocytes. To the template, type I collagen and an elastin derived peptide were incorporated in order to form the final PG-Leu-Leu-Col-El scaffold. Results indicated the formation of gelatinous, fibrous scaffolds. DSC analysis showed phase changes that included crystallisation and thermal melting due to re-organisation of the scaffold components. Young's modulus was determined to be 832 ± 2 MPa. Rheology studies showed that the scaffold maintained a constant G´ / G˝ ratio over a wide range of angular frequency. Cell studies with bone marrow derived mesenchymal stem cells (BMSC) indicated that the scaffolds promoted cell proliferation and formed three dimensional cell-scaffold matrices. This newly developed scaffold may open new opportunities for tissue engineering applications.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44533504","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 tight-binding model study of the role of electron occupancy on the ferromagnetic gap in graphene-on-substrate 电子占据对石墨烯铁磁间隙影响的紧束缚模型研究
International Journal of Nano and Biomaterials Pub Date : 2019-01-31 DOI: 10.1504/IJNBM.2019.10018684
Rashmirekha Swain, S. Sahu, G. C. Rout
{"title":"The tight-binding model study of the role of electron occupancy on the ferromagnetic gap in graphene-on-substrate","authors":"Rashmirekha Swain, S. Sahu, G. C. Rout","doi":"10.1504/IJNBM.2019.10018684","DOIUrl":"https://doi.org/10.1504/IJNBM.2019.10018684","url":null,"abstract":"We propose here a theoretical model for graphene in its ferromagnetic phase. The Hamiltonian describes electron hoppings up-to-third-nearest neighbours for graphene-on-substrate. The sub-lattice coulomb interactions within mean-field approach involve the total electron occupancy and ferromagnetic magnetisations (FMs). The temperature dependent ferromagnetic magnetisation and hence, the ferromagnetic gap are derived from the electron Green's functions and are solved self-consistently. The result shows that the magnitude of the ferromagnetic gap and the critical coulomb interaction strongly depend on total electron occupancy. The critical coulomb interaction decreases with increase of electron occupancy and the vice-versa.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47723289","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
Theoretical study of anisotropy in orbital and antiferromagnetic spin orderings in CMR manganites CMR锰矿中轨道各向异性和反铁磁自旋有序的理论研究
International Journal of Nano and Biomaterials Pub Date : 2019-01-31 DOI: 10.1504/IJNBM.2019.10018701
S. Panda, D. Sahoo, G. C. Rout
{"title":"Theoretical study of anisotropy in orbital and antiferromagnetic spin orderings in CMR manganites","authors":"S. Panda, D. Sahoo, G. C. Rout","doi":"10.1504/IJNBM.2019.10018701","DOIUrl":"https://doi.org/10.1504/IJNBM.2019.10018701","url":null,"abstract":"We report here a tight binding model for doped rare earth manganites consisting of Kubo-Ohata type double exchange (DE) interaction between the eg and t2g band electron spins of same site. A Heisenberg type antiferromagnetic spin-spin interaction is considered among the core band electrons. Both nearest and next nearest neighbouring interactions are taken in the Heisenberg coupling and kinetic energy interaction. The presence of DE interaction induces antiferromagnetism (AFM) in eg band. The Jahn-Teller (JT) distortion leads to anisotropy in the manganite systems. We have considered JT distortion as an extra mechanism. The model Hamiltonian is solved using Zubarev's Green's function technique. The interplay between temperature dependent lattice strain and transverse spin fluctuations is studied. We have studied the in-plane anisotropy observed in the AFM spin fluctuation and its effect on the lattice strain.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44800717","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
Synthesis of high surface area boehmite and alumina by using walnut shell as template 以核桃壳为模板合成高比表面积勃姆石和氧化铝
International Journal of Nano and Biomaterials Pub Date : 2019-01-31 DOI: 10.1504/IJNBM.2019.10018699
A. Zamani, A. P. Marjani, Nasim Abdollahpour
{"title":"Synthesis of high surface area boehmite and alumina by using walnut shell as template","authors":"A. Zamani, A. P. Marjani, Nasim Abdollahpour","doi":"10.1504/IJNBM.2019.10018699","DOIUrl":"https://doi.org/10.1504/IJNBM.2019.10018699","url":null,"abstract":"In the present study high surface area amorphous boehmite and γ-alumina were synthesised using walnut shell as template. This green, simple and useful synthetic protocol was based on the precipitation of aluminium hydroxide as the source of aluminium on biomass in an aqueous phase followed by calcination. The influence of walnut shell was evaluated by varying the calcination atmosphere. N2 adsorption/desorption porosimetry exhibited high surface area for boehmite and γ-alumina. Furthermore, the pore size and surface area of these mesoporous materials can be adjusted by varying the experimental conditions. Additionally, boehmite was studied as the support of vanadium catalyst for the oxidation of alcohols by hydrogen peroxide. We have found that resulting V-loaded material act as an effective catalytic system for the oxidation of a wide range of alcohols in 1,4-dioxane. The catalyst can be recovered and reused four times without loss of activity.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44266492","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: 2
The theoretical study of the correlation between band filling and Coulomb interaction in the charge gap of graphene-on-substrate in paramagnetic limit 顺磁极限下石墨烯衬底电荷隙带填充与库仑相互作用关系的理论研究
International Journal of Nano and Biomaterials Pub Date : 2019-01-31 DOI: 10.1504/IJNBM.2019.10018685
R. Panda, S. Sahu, G. C. Rout
{"title":"The theoretical study of the correlation between band filling and Coulomb interaction in the charge gap of graphene-on-substrate in paramagnetic limit","authors":"R. Panda, S. Sahu, G. C. Rout","doi":"10.1504/IJNBM.2019.10018685","DOIUrl":"https://doi.org/10.1504/IJNBM.2019.10018685","url":null,"abstract":"A suitable substrate breaks the sub-lattice symmetry leading to generation of a gap at the Fermi level. We propose here a tight binding model Hamiltonian for graphene on a substrate with nearest neighbour-hopping in presence of symmetry breaking interaction due to substrate effect. The sub-lattice Coulomb interaction between the electrons which produces varieties of magnetic, non-magnetic and collective interactions is considered within mean-field approximation in the paramagnetic limit. The Hamiltonian is solved by Zubarev's double time Green's function technique. The electron occupancies of the two sub-lattices are calculated from the correlation functions. Finally, the expression for the temperature dependent charge gap is derived and calculated numerically. The evolution of the charge gap in graphene is investigated by varying the Coulomb interaction, electron-occupancy and substrate induced gap. The magnitude of the electron occupancy at A-site becomes larger than that at B-site indicating symmetry breaking of the two sub-lattices of graphene.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41667890","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
Microscopic study of the role of second nearest neighbour spin density wave coupling and electron hopping on superconducting gap 第二近邻自旋密度波耦合和电子跳变对超导间隙作用的微观研究
International Journal of Nano and Biomaterials Pub Date : 2019-01-31 DOI: 10.1504/IJNBM.2019.10018700
Pratima Beura, K. Mohanta, G. C. Rout
{"title":"Microscopic study of the role of second nearest neighbour spin density wave coupling and electron hopping on superconducting gap","authors":"Pratima Beura, K. Mohanta, G. C. Rout","doi":"10.1504/IJNBM.2019.10018700","DOIUrl":"https://doi.org/10.1504/IJNBM.2019.10018700","url":null,"abstract":"We report here a tight binding single band model Hamiltonian to study the role of spin density wave interaction and superconductivity. The Hamiltonian consists of nearest and next nearest neighbour electron hopping between the copper sides. The spin density wave interaction also includes nearest-neighbour and the next-nearest-neighbour spin interactions within a mean field approximation. BCS type superconducting interaction is considered taking d-wave pairing symmetry. By using Zubarev's Green function technique the Hamiltonian is solved. The antiferromagnetic and the superconducting gap equations are derived from the correlation functions and are solved self-consistently technique 100 × 100 grid points of the electron momentum. The evolution of these two order parameters are investigated by varying hole doping concentration, superconducting coupling, spin density wave coupling and second nearest neighbour electron hopping integrals.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41594700","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
Study on thermal field of a laser heated gemstone matrix by finite element method 激光加热宝石基体热场的有限元研究
International Journal of Nano and Biomaterials Pub Date : 2018-09-27 DOI: 10.1504/IJNBM.2018.10016279
Radhakanta Dash, P. Mishra
{"title":"Study on thermal field of a laser heated gemstone matrix by finite element method","authors":"Radhakanta Dash, P. Mishra","doi":"10.1504/IJNBM.2018.10016279","DOIUrl":"https://doi.org/10.1504/IJNBM.2018.10016279","url":null,"abstract":"This paper presents the finite element modelling of the thermal field of a gemstone matrix by laser beam local heating. By using a continuous Gaussian beam of infrared laser a 3D temperature distribution in the gemstone material in the time domain is obtained. A tetrahedral mesh is used to solve the heat conduction equation in the entire 3D-structure. A transient thermal analysis of the interaction of the laser beam with the gemstone matrix reveals the temperature distribution profile throughout the volume of the material. The temperature profile of the computational model of the gemstone is in good agreement with the experimental observations.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":"7 1","pages":"251"},"PeriodicalIF":0.0,"publicationDate":"2018-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41718082","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
Structure and reaction dynamics of zirconium in the relativistic mean field model 锆在相对论平均场模型中的结构和反应动力学
International Journal of Nano and Biomaterials Pub Date : 2018-09-27 DOI: 10.1504/IJNBM.2018.10016286
M. Panigrahi, R. Panda
{"title":"Structure and reaction dynamics of zirconium in the relativistic mean field model","authors":"M. Panigrahi, R. Panda","doi":"10.1504/IJNBM.2018.10016286","DOIUrl":"https://doi.org/10.1504/IJNBM.2018.10016286","url":null,"abstract":"In the framework of relativistic mean field theory using NL3, NL3*, NLSH, DD-PC1 and DD-ME2 parameter sets, the ground state binding energy, charge radius, quadrupole deformation parameter of three key isotopes of Zr, i.e., 90,92,94Zr has been studied. The results are compared with the experimental data and are found in reasonable agreement. The two-neutron separation energy and β-decay half-life of these isotopes are also evaluated. Total reaction and elastic differential scattering cross-section are also studied for these isotopes as projectile with 12C as target, using above parameter sets in conjunction with Glauber model and results are compared with the experimental data. All these investigations support the abundance of these three isotopes of zirconium.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":"7 1","pages":"321"},"PeriodicalIF":0.0,"publicationDate":"2018-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49120873","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
Thin membrane with biomimetic hexagonal patterned surface for guided bone regeneration 仿生六边形表面薄膜引导骨再生
International Journal of Nano and Biomaterials Pub Date : 2018-09-27 DOI: 10.1504/IJNBM.2018.10016280
Anurag Satpathy, R. Mohanty, T. Rautray
{"title":"Thin membrane with biomimetic hexagonal patterned surface for guided bone regeneration","authors":"Anurag Satpathy, R. Mohanty, T. Rautray","doi":"10.1504/IJNBM.2018.10016280","DOIUrl":"https://doi.org/10.1504/IJNBM.2018.10016280","url":null,"abstract":"Polymeric membranes used as a barrier in guided tissue regeneration have undergone several modifications for improved structural, handling and biological properties. Biomaterial surface characteristics are critical in regulating cell function. Physicochemical signals from the substrate surfaces stimulate cell behaviour. This paper focuses on fabrication of biodegradable barrier membrane with hexagonal patterned surface for guided tissue regeneration. Hexagonal patterned surfaces were obtained during solvent casting of chitosan solution using a novel method. Obtained barrier membranes were analysed under stereo and electron microscopy and were assessed for their surface roughness. The hexagonal patterned surface barrier membranes had a significantly higher surface roughness (p < 0.001).","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":"7 1","pages":"275"},"PeriodicalIF":0.0,"publicationDate":"2018-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46098453","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
Preparation of TiO2 film on Ag and Al electrode for electrochemical bio-sensing application 用于电化学生物传感的Ag和Al电极上TiO2膜的制备
International Journal of Nano and Biomaterials Pub Date : 2018-09-27 DOI: 10.1504/ijnbm.2018.10016283
Nibedita Patro, P. Pattanaik, S. Kamilla
{"title":"Preparation of TiO2 film on Ag and Al electrode for electrochemical bio-sensing application","authors":"Nibedita Patro, P. Pattanaik, S. Kamilla","doi":"10.1504/ijnbm.2018.10016283","DOIUrl":"https://doi.org/10.1504/ijnbm.2018.10016283","url":null,"abstract":"In this present, work, titanium dioxide (TiO2) deposited on Ag and Al electrodes were fabricated by sol-gel chemical wet and dry (CWD) method to detect urea. The formation of the polycrystalline TiO2 deposited on Ag and Al substrates were confirmed by X-ray diffraction (XRD) analysis. The XRD analyses of both the samples clearly indicated that some percentage of Ag and Al diffuses into the TiO2 matrix at its interface region. The nature of I-V characteristics showed by the TiO2 on Ag and Al wire electrodes are found to be Ohmic and is perfect to be used for electrochemical sensor or bio-sensor at very low potential value. The performance and response to various concentrations of urea solution and pH level were experimentally studied by using TiO2 coated on Ag and Al as working electrodes with respect to Ag as reference electrode.","PeriodicalId":13999,"journal":{"name":"International Journal of Nano and Biomaterials","volume":"7 1","pages":"311"},"PeriodicalIF":0.0,"publicationDate":"2018-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49322924","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
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