Journal of Material Sciences & Engineering最新文献

{"title":"Elements of Antigen Introducing Cells can be Adjusted by GoldNanoparticles Presentation: A Review Article","authors":"A. Gonon","doi":"10.37421/2169-0022.2021.10.555","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.555","url":null,"abstract":"","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"132 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74540893","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":"New Methods for the Determination of the Surface Physicochemical Properties and Glass Transition of Polyaniline in Conducting and Non-Conducting Forms by Using Igc Technique at Infinite Dilution","authors":"T. Hamieh, Khaled Chawraba, J. Lalevée, J. Toufaily","doi":"10.37421/2169-0022.2021.10.565","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.565","url":null,"abstract":"Many studies were devoted in our Laboratory to the determination of physico-chemical and thermodynamic properties of polymers and/or oxides by using the inverse gas chromatography (IGC) at infinite dilution. More particularly, we studied the interactions of solid substrates with some model organic molecules and their acid-base properties, in Lewis terms, by determining the acidic and basic constants. We proposed in this paper to study the surface thermodynamic energetics, transition phenomena, specific interactions and acid-base properties of both the conducting polyaniline (PANI-HEBSA) and the non-conducting form (PANI-EB) on the light of the new progresses of IGC methods. This technique was used to obtain the net retention volume Vn and then the dispersive free enthalpy of n-alkanes adsorbed on PANI. The curves of the dispersive component of the surface energy of n-alkanes adsorbed on PANI, as a function of the temperature highlighted the presence of two transition temperatures on 383K and 430K respectively for PANI-HEBSA and PANI-EB. There results were confirmed by the curves of RTlnVn =f(1/T) of n-alkanes. The determination of the specific free enthalpy of polar molecules adsorbed on PANI proved a shift of 4K in the value of the glass transition of PANI-EB. From the variation of as a function of the temperature, one deduced the values of the specific enthalpy of the various polar molecules and determined the acidic constant KA and basic constant KD, the two constants characterizing the solid substrate. It was showed that PANI is highly more basic than acidic (about 2.6 times more basic) and an increase of the acid-base character was highlighted near the glass transition for PANI-EB.","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"35 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80497173","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":"An Unique Application of Pnccd X-Ray Detector in Material Characterization","authors":"M. Khan","doi":"10.37421/2169-0022.2021.10.563","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.563","url":null,"abstract":"In the current work, the principle focus is to analyze the measurements of X-rays by the application of Fast Readout Charge-Coupled Device (pnCCD), which is a special form of CCD developed for the purpose of spectroscopy & imaging of X-radiation with high time resolution. As a part of this work, two phases are taken into consideration. In the first phase, highly accelerated electrons induced by high voltage are collided with a metal target (anode material-Mo in this case) in X-ray tube and emitted X-rays from the tube are measured by pnCCD. In this phase, the X-ray spectrum depends on the anode material and accelerating voltage. During the phase 1 experiment, various elements are noticed in the X-ray spectra, which are originated from the experimental apparatus (X-ray tube only) and its surrounding materials. Through proper energy calibration technique, elemental composition of the materials have been determined. In the second phase, fluorescence X-radiation (secondary radiation), emitted by the secondary target source (MnO2) is measured by pnCCD where, Mn is excited by being bombarded with high energy X-rays from X-ray tube. It is to be noted that MnO2 source is guarded by pure Al sheet foil that protects X-rays from other materials. That is why background radiation is decreased and as a result, clean Mn spectrum is observed. To avoid distortion of the intensity determination, the detector’s degree of illumination is maintained less than 2% in both phases by using Al filters with required thickness. In terms of intensity, it can be concluded that the intensity of K X-rays released from MnO2 source is approximately 0.06% in compare to the total intensity of direct emission spectra from experimental apparatus (X-ray tube) for 25 keV.","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89070634","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":"Improvement and Enhancement of Enzyme Activity by Metal-Organic Framework (MOF) Adsorption","authors":"Yoshiyuki Sato, T. Akitsu","doi":"10.37421/2169-0022.2021.10.567","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.567","url":null,"abstract":"This short commentary mentions some reports of immobilization of enzymes by encapsulation into the structure of metal organic frameworks (MOFs) and adsorption on the surface of the MOFs. Improvements in thermal stability, storage stability, and reusability were also observed. The ability to improve the function of enzymes while maintaining their stability will lead to cost reduction. In addition, there are possible applications in the fields of biosensing and cancer treatment.","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"237 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80373826","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":"Novel Approach for Obtaining Nanocomposites with a High Percentage of Mwcnts Reinforcement and Elastomeric Materials PU/MWCNT","authors":"Khaled Chawraba, A. Nassereddine, Hareth Sleiman, J. Toufaily, J. Lalevée, T. Hamieh","doi":"10.37421/2169-0022.2021.10.568","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.568","url":null,"abstract":"Novel nanocomposites based on polyurethane/carbon nanotube and incorporation of functional groups (hydroquinone and citric acid) were prepared by “solution casting method”. In this work, a high percentage of carbon-nanotubes (CNTs) was introduced successfully into the polyurethane. The samples were characterized by scanning electron microscopy (SEM); the results obtained showed a high dispersion of CNTs on polymer. Then, the thermal stability of the nanocomposites was evaluated by thermal gravimetric analysis (TGA), and the mechanical properties were evaluated by tensile test. Compared to pure polyurethane, the nanocomposites, with high loading of CNTs, displayed better thermal stability and mechanical properties (high elongation at break-1000%).","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"33 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81004825","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":"Good Governance in Oromia: Challenges and Strategies (Major Cities in Arsi and East Shewa zone in focus, Ethiopia)","authors":"Zinabie Degu","doi":"10.37421/2169-0022.2021.10.559","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.559","url":null,"abstract":"The main objective of this study was to identify the level of good governance with respect to its founding pillar elements in Oromia Arsi and East shewa zone selected urban cities. The key elements of good governance considered in the study were accountability, transparency, participation, responsiveness, control of corruption, operational effectiveness and efficiency, equity building and inclusive, and consensus orientation,. The study followed a survey and focus group discussion. The data were collected from four selected cities that in Adama, Asella, Batu, and Shashemenne. Analyses were based on primary data generated through structured questionnaire for each key elements of good governance. Focus group discussion was also conducted with selected informant groups. Descriptive analyses were specified to identify the current practice of good governance. The focus group discussion data were subject to thematic analyses and triangulated with the findings from survey analyses. The pillars of good governance such as: accountability, participation, responsiveness, responsibility, efficiency and effectiveness, equity and consensus orientation, elements observed at low level within the selected city administration. Top priority problems were identified for respective cities. Fraud with respect to land administration and project authorization are among the top source of corruption. The study proposed pre-symptom actions and after symptom actions to curb corruption and establish good governance within the city administration.","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"60 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76380641","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":"Short Communication on Photon Mass","authors":"S. Orlov","doi":"10.37421/2169-0022.2021.10.561","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.561","url":null,"abstract":"The atomic structure is presented on the basis of the theory of vortex gravitation. The feasibility and calculation of the values of the density and mass of electromagnetic particles are proposed. A calculation is made, which proves that the photon must have mass. In the calculations, some physical characteristics of electromagnetic particles that are accepted by modern physics are refuted.","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"13 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83098501","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":"Nano Asphalt Production Using Microemulation and Sonication Method: Yield Optimization Using Surface Response: A Review Article","authors":"Riny Yol, ha Parapat","doi":"10.37421/2169-0022.2021.10.554","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.554","url":null,"abstract":"The largest natural asphalt deposit in the world is located in Buton Island (Indonesia) which is around 677 million tons. Efforts in utilizing the Asbuton rock to produce asphalt as the replacement of petroleum asphalt have been carried out by other researchers, but they only produced a conventional type of asphalt. Also, in general, the method that was used is quite expensive. The conventional asphalt in road pavement is unable to withstand traffic loads and excessive temperatures, resulting in deformation. This research is about making nano asphalt from Asbuton rock with using a combination of microemulsion technique and sonication. The advantage of this technique is the effectiveness of the process in producing the nano asphalt that is by extracting the asphalt from the pores of Asbuton rock simultaneously forming (in-situ) the nanoparticles. Experimental variables that are varied in this study are the temperature, oil fraction, type of solvent, particle size, and type of surfactant (HLB). To find the optimum Yield of nano asphalt, the involved variables are simulated and optimized by using Factorial Design, Pareto Diagram, and Response Surface methods. The comprehensive results from the simulation are presented in this report including the significant variables which were optimized to produce the optimum Yield of nano asphalt. The optimum Yield of nano asphalt theoretically generated from Response Surface ranged between 80 – 99.90%. The results of validation with experiments using optimized variables show the similarity between the optimum Yields and the simulated Yields value. The produced nano asphalt was investigated by Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), Infrared Spectrophotometer (IR) and X-Ray Diffraction (XRD) to prove the quality of nano asphalt. Lately, the utilization of polymer nanocomposite for development of strong black-top combinations has been progressively supplanting the use of polymer-altered covers. In this examination, the enhancement of nanosilica and fastener content for nanocomposite-altered","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"79 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88289957","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":"Pico/Nano/Micro Drop Dispensing Platform Using Unique DisposableCartridges for Non-Contact & no Cross Contamination Dispensing in LifeSciences and Industry: A Review Article","authors":"T. Guillerm, G. Leen","doi":"10.37421/2169-0022.2021.10.558","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.558","url":null,"abstract":"","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"22 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78000871","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":"Market Analysis on Biomaterials, Cellular and Tissue Engineering","authors":"Grace Fern, Ez","doi":"10.37421/2169-0022.2021.10.566","DOIUrl":"https://doi.org/10.37421/2169-0022.2021.10.566","url":null,"abstract":"The global bone cement and glue markets are sure to succeed in USD one, 322.6 Million by 2022 from USD 993.0 Million in 2017, at a CAGR of five.9%. Market development is primarily driven by the rising prevalence of sports injuries and accumulative developments in the regenerative drugs field. In 2009, the orthopedical biomaterial market recorded revenues of $236.5 million or thirty-seven.5% of the overall biomaterial merchandise market. This can be principally attributable to accumulative application areas and starter of refined technologies within the biomaterials market. Anyhow, the orthopedical biomaterial market is calculable to grow at a CAGR of seventeen. 2% from 2010 to 2015. vas biomaterial merchandise market is that the 2nd market, causative 12 months of the overall biomaterial merchandise market. The 3D bioprinting market is probably going to succeed in USD one, 332.6 Million by 2021 from USD 411.4 Million in 2016, at a CAGR of twenty-six.5% throughout the prediction amount. Growing claim for organ transplantation, growing R&D, increasing public and personal investments in analysis, and rising use of 3D bioprinting in drug discovery area unit driving the expansion of this market. The worldwide 3D printing medical devices market is projected to succeed in USD one.88 Billion by 2022 from USD zero.84 Billion in 2017, at a CAGR of seventeen.5% throughout the forecast amount. The international bone cement and glue market are predicted to reach USD one, 322.6 Million by 2022 from USD 993.0 Million in 2017, at a CAGR of five.9%.","PeriodicalId":16326,"journal":{"name":"Journal of Material Sciences & Engineering","volume":"48 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75350101","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}