Egyptian Journal of Solids最新文献

{"title":"Structure, properties, and thermal behavior of chemically synthesized 3-((2,5 Difluorophenyl)diazenyl)-6-ethyl-4-hydrox-2H-pyrano[3,2-c]quinoline-2,5(6H)-dione as new brand organic materials: Antimicrobial activity","authors":"H. Soliman, I. Yahia","doi":"10.21608/ejs.2023.219510.1044","DOIUrl":"https://doi.org/10.21608/ejs.2023.219510.1044","url":null,"abstract":"Chemical, crystal structures, properties, thermal behaviour, kinetic parameters, and antitumor activity of synthesized 3-((2,5-Difluorophenyl)diazenyl)-6-ethyl-4-hydrox-2 H - pyrano[3,2-c ]quinoline-2,5(6 H )-dione (DFPDAEHPQD) were investigated and characterized. Different techniques are used to identify the structure of DFPDAEHPQD, such as 1 H nuclear magnetic resonance (NMR) 13 C NMR, X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) measurements. XRD analysis showed that DFPDAEHPQD had a polycrystalline nature, and TGA results illustrated that the DFPDAEHPQD was thermally stable up to about 300 o C. Optical parameters and absorption coefficient of DFPDAEHPQD were calculated using diffused reflectance (DR) measurements in a wide range of wavelengths (200 to 1600 nm). Two optical bandgap values (2.35 and 2.25 eV) were obtained in the applied range of photon energy using Kubelka–Munk theory (KMT). The first value (2.35 eV) is responsible for the direct transition, while the other value (2.25 eV) is responsible for the indirect transition. The AC conductivity obeyed the universal power-law σ AC (ω) = Aω s . Moreover, DFPDAEHPQD showed highly significant antitumor activity and cytotoxicity against two human cancer cell lines: HepG-2 and HCT-116, with the corresponding IC 50 values of 3.07 and 7.15 μg/ml, respectively. Finally, we hope that DFPDAEHPQD turns out to be environmentally friendly and more energy efficient a novel semiconductor for safe use in various electronic and biomedical applications.","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114741868","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":"Impact of pre-torsional deformation and nanoparticles addition on the mechanical behavior of Sn-based soft solder alloy","authors":"Milad Sobhy","doi":"10.21608/ejs.2022.163733.1040","DOIUrl":"https://doi.org/10.21608/ejs.2022.163733.1040","url":null,"abstract":"This research aimed to study the effect of pre-deformation by torsion and the addition of ZnO nanoparticles on the microstructure and tensile behavior of Sn-based soft solder alloys. The used alloys are Sn-3Ag-0.7Cu (SAC307) and Sn-3Ag-0.7Cu doped with 0.3wt%ZnO nanoparticles SACZ3(307). Pre-deformation increases the dislocation density consequently the lattice strain is increased. Applying pre-torsional deformation before the tensile test resulted in the enhancement of the mechanical properties σ y0.2 , σ f and  p for both SAC (307) and composite solders at different working temperatures. These changes in mechanical properties depend on the internal structure of both solders since deformation generates an excess of mixed defects. Also, the dispersed intermetallic compounds (IMCs) particles hinder the motion of dislocations. This study includes new and novel results about the behavior of fracture strain ε f with deformation at different working temperatures. According to the obtained activation energy Q values, the dislocation-IMCs interaction is the deformation mechanism taking place in both alloys .","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133200485","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":"Effect of Copper and Copper oxide Nanoparticles on The Transient Creep Properties of Sn-4Zn alloy","authors":"Dr.Manal Maher","doi":"10.21608/ejs.2022.155017.1039","DOIUrl":"https://doi.org/10.21608/ejs.2022.155017.1039","url":null,"abstract":"Cu-Sn-Zn alloys are excessively utilized in different manufacturing applications due to their unparalleled advantages, such as very its low resistivity, altitude business strength, and premium weld ability. Sn-4Zn alloy is concerning to the lead-liberation arrangement which is favourable in respect of the comparatively minimal fusion degree and minimal price. Nevertheless, Zn displays destitute oxidation and corrosion resistance which prevent welding employment. The present research studied the addition effect of Cu and CuO nanoparticles (NPS) on the transient creep properties of the Sn-4Zn alloy. Three compositions of Cu-Sn-Zn alloys were studied Sn-4Zn, Sn-4Zn-0.4CuO (NPS), and Sn-4Zn-1.5Cu (NPS). X-ray diffraction (XRD) and Scanning Electron Microscopy attached with Energy-dispersive X-ray spectroscopy (SEM-EDX) were used to investigate the microstructure of the prepared alloy samples. The results proved the addition of 0.4 CuO (NPS) to Sn-4Zn alloy increased the strength of the alloy by about 11%, while the addition of 1.5 Cu (NPS) increased the ductility of the alloy by about 14%. Additionally, the Creep property for Sn-4Zn; Sn-4Zn-0.4 CuO (NPS), and Sn-4Zn-1.5Cu alloys is investigated during distinct employing temperatures, three degrees extended between 303 until 373 K and under seven varied fixed utilized stresses (σ) from 10 MPa to 24 MPa. The results showed the magnitude of β and n is distinctly linked to the creep test circumstances (T) and stress (σ) as εtr = βtn. The coefficients (n) is raised by rising (T) regardless of the utilized stress (σ); while (β) is reduced by growing (T) and /or stress (σ). (NPs).","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117097374","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":"ATR-FTIR and UV-vis spectroscopy studies of microwave oven-generated oxygen plasma modification for PVA films","authors":"S. Elashry, H. Elsaeed, N. El-siragy","doi":"10.21608/ejs.2022.145459.1037","DOIUrl":"https://doi.org/10.21608/ejs.2022.145459.1037","url":null,"abstract":"In this study, a microwave oven-based plasma generation process is disclosed that is both easy and low-cost. A Paschen-like curve is observed. Because of polyvinyl alcohol (PVA) polymer's excellent properties, it can be used in many fields, including food packaging and agriculture, after plasma treatment. A solution-casting approach was used to create pure polyvinyl alcohol (PVA) film. In the second regime, Oxygen plasma treatment was used to modify the PVA surface at a constant power of 1000W with different O 2 flow rates and pressures. XRD, ATR-FTIR, and UV-vis spectra were used to examine the surface properties of the films. An X-ray study revealed that the pure PVA film is semi-crystalline in nature. The transmission peaks of the treated plasma film are clearly intense at 15 sec, 26 mbar, and 6 L/min. At 26 mbar, a slight peak shift towards higher wavenumbers is observed, corresponding to the C-O stretching of acetyl groups. The highest transmittance, nearly 64 percent, is found in the UV region of the UV-vis spectra at the same optimised conditions as FTIR. As a result of these findings, PVA became a transparent material for greenhouses. technique is still limited in the second regime. The present work aimed to study the PVA polymer to demonstrate its usage in agricultural applications. transmittance untreated","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121861673","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":"Linear and non linear optical properties of PVA-Ag/Coumarin Nanocomposites (again)","authors":"Tarek Elarasasi, Maha A. Atallah, Mervat Elshaarawy, N. Shash","doi":"10.21608/ejs.2022.111426.1031","DOIUrl":"https://doi.org/10.21608/ejs.2022.111426.1031","url":null,"abstract":"","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133796492","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":"WO3 thin films by spin coating technique and their wettability","authors":"Z. Khalifa, M. Shaban, M. Zayed","doi":"10.21608/ejs.2022.142284.1036","DOIUrl":"https://doi.org/10.21608/ejs.2022.142284.1036","url":null,"abstract":"Preparation of tungsten trioxide, WO 3, thin films on c-Si substrates using sol-gel method from a precursor based on non-alkoxide materials has been done in this study. Differential scanning calorimetry, DSC, thermogravimetry, TGA, and differential thermal analysis, DTA, have been used to monitor structural changes during heating. Thermal analysis of the xerogel gives a clear idea about water evolving and phase change. X-ray diffraction, XRD, studies revealed that the film dried at 120 ˚C for 1h is non-crystalline. After heating at 700˚C for 2h, a monoclinic phase of WO 3 with preferred orientation along (200) direction appeared. Chemical bonding has been explored by Fourier transform infrared spectroscopy, FTIR. Surface roughness has been found to increase with the increase of annealing temperature as revealed from AFM measurements. At temperatures equal and above 700 ˚C, contact angle decreased due to surface roughness increase. Correlation between the characteristic properties and the contact angle measurements has been discussed.","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116833059","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":"High Surface Area and Photo-catalysis of Cu0.3Cd0.7CrFeO4 Nanocrystals in Degradation of Methylene Blue (MB)","authors":"A. Ghoneim","doi":"10.21608/ejs.2021.99837.1024","DOIUrl":"https://doi.org/10.21608/ejs.2021.99837.1024","url":null,"abstract":"","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"292 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115424537","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":"Performance analysis of a Silicon PV module (100W) in outdoor conditions: Experimental and Simulation study","authors":"Ali Ibrahim, M. Ramadan, Ahmed Elsebaei, Hassan Elgohary, A. AbdEldayem","doi":"10.21608/ejs.2021.100187.1025","DOIUrl":"https://doi.org/10.21608/ejs.2021.100187.1025","url":null,"abstract":"In this paper, the incident solar radiation on horizontal and tilting surfaces was measured for a year using a pyranometer on the roof of Tanta University's Faculty of Science in Tanta city which is located at Latitude (30° 41`). The average daily global hourly solar radiation values on horizontal surfaces (H) and the global hourly solar radiation values on inclined surfaces (Ht) had been measured in the south direction of the sun for the meteorological variables. Miguel et al. correlation was used to determine hourly values of the beam and diffuse components of solar radiation (SR) from global solar irradiance. In order to attain the best solar module performance throughout the year, the solar energy devices must be tilted south with a tilting angle equal to Tanta city's latitude. The maximum value of Ht was 1174.15 Wm -2 in April and the minimum value of Ht was 816.11Wm -2 in October. The performance of 100 W solar silicon photovoltaic (PV) module in outdoor conditions can be studied by depending on the incident values of H and Ht. The obtained results showed that the efficiencies of the 100 W solar PV module in winter, spring, summer and autumn were 4.29, 3.78, 7.56 and 4.58 %, respectively. The maximum power point (Pmax) was calculated in July and its value was 45.98 W at solar noon and the minimum power point (Pmin) was calculated in October with a value equal to 18.56 W at solar noon. Also, the short circuit current (Isc), the open-circuit voltage (Voc), the series resistance (Rs), the shunt resistance (Rsh), and other electrical properties help to identify the performance of the solar PV module had been measured. The calculated optimum load resistance (RLmp) was 3.42, 3.88, 3.39, and 4.82 Ω, in winter, spring, summer and autumn, respectively. Also, a simulation of three cases of solar photovoltaic systems to generate the electric power for applying the domestic utilization of these systems had been determined. This simulation depends on an application called SolarCT to calculate the requirements of the photovoltaic systems in El-Gharbia province had been used.","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129328005","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":"Influence of band gap and carrier concentration on ZnO/CuO solar cells performance","authors":"M. Abdelfatah, H. Salah, Mabrok Bakry, Walid Ismail, A. El-Shaer, S. Abdelgawad","doi":"10.21608/ejs.2021.92116.1018","DOIUrl":"https://doi.org/10.21608/ejs.2021.92116.1018","url":null,"abstract":"","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"154 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131363095","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":"SERS detection of DNA cancer with single-base mutation for KRAS-gene","authors":"T. Abdallah, Hend Awad, H. Talaat","doi":"10.21608/ejs.2021.101958.1027","DOIUrl":"https://doi.org/10.21608/ejs.2021.101958.1027","url":null,"abstract":"We present a method based on surface enhanced Raman spectroscopy (SERS) to detect DNA KRAS-gene with single-base mutation. The KRAS gene belongs to the oncogenes class of genes. KRAS mutations cause normal cells to become cancerous. The detection utilizes DNA gene probes labeled by CY3 dye (as Raman marker) and plasmonic silver nanoparticles (Ag NPs) deposited on SERS substrates. SERS detect DNA via hybridization to the complementary DNA (target) sequences with single-base mutation. This SERS technique is a powerful tool and has a great potential gives both affectability and selectivity. Also, we utilized the Raman mapping to provide chemical information coupled with spatial information. The mapping image was obtained using scanning with three Raman bands over selected areas of the sample. The limit of detection (LOD) was accomplished down to a concentration 9 nM after the addition of magnesium sulfate (MgSO4) aggregated agent, causing hot spots of the aggregated Ag NPs.","PeriodicalId":445633,"journal":{"name":"Egyptian Journal of Solids","volume":"14 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130759778","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}