Pub Date : 2023-08-01DOI: 10.21608/ejs.2023.219510.1044
H. Soliman, I. Yahia
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.
对合成的3-((2,5-二氟苯基)二氮基)-6-乙基-4-羟基-2 H -吡喃[3,2-c]喹啉-2,5(6 H)-二酮(DFPDAEHPQD)进行了化学、晶体结构、性质、热行为、动力学参数和抗肿瘤活性的研究。采用不同的技术鉴定DFPDAEHPQD的结构，如1h核磁共振(NMR)、13c核磁共振(NMR)、x射线衍射(XRD)分析、扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)和热重分析(TGA)测量。XRD分析表明DFPDAEHPQD具有多晶性质，TGA结果表明DFPDAEHPQD在300℃左右的温度下具有热稳定性，利用200 ~ 1600 nm范围内的扩散反射率(DR)测量计算了DFPDAEHPQD的光学参数和吸收系数。利用Kubelka-Munk理论(KMT)在光子能量的应用范围内得到了两个光学带隙值(2.35和2.25 eV)。第一个值(2.35 eV)负责直接转变，而另一个值(2.25 eV)负责间接转变。交流电导率符合通用幂律σ AC (ω) = Aω s。此外，DFPDAEHPQD对HepG-2和HCT-116两种人类癌细胞均表现出极显著的抗肿瘤活性和细胞毒性，其IC 50值分别为3.07和7.15 μg/ml。最后，我们希望DFPDAEHPQD成为一种环保和更节能的新型半导体，可安全用于各种电子和生物医学应用。
{"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}
Pub Date : 2022-10-06DOI: 10.21608/ejs.2022.163733.1040
Milad Sobhy
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 .
{"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}
Pub Date : 2022-09-23DOI: 10.21608/ejs.2022.155017.1039
Dr.Manal Maher
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).
Cu-Sn-Zn合金由于其无可比拟的优势，例如其极低的电阻率，高海拔商业强度和优良的焊接能力，在不同的制造应用中得到了广泛的应用。Sn-4Zn合金的解铅安排有利于相对最小的熔合度和最低的价格。然而，锌表现出较差的抗氧化性和耐腐蚀性，阻碍了焊接工作。本文研究了Cu和CuO纳米颗粒(NPS)的加入对Sn-4Zn合金瞬态蠕变性能的影响。研究了Sn-4Zn、Sn-4Zn-0.4 cuo (NPS)和Sn-4Zn-1.5 cu (NPS)三种Cu-Sn-Zn合金成分。利用x射线衍射仪(XRD)和扫描电子显微镜(SEM-EDX)对制备的合金样品进行微观组织表征。结果表明，添加0.4 CuO (NPS)可使Sn-4Zn合金的强度提高约11%，添加1.5 Cu (NPS)可使合金的延展性提高约14%。此外，Sn-4Zn的蠕变性能;研究了Sn-4Zn-0.4 CuO (NPS)和Sn-4Zn-1.5Cu合金在不同的加热温度下(从303到373 K的3度扩展)和10到24 MPa的7种不同的固定利用应力(σ)。结果表明，β和n的大小与蠕变试验环境(T)和应力(σ)有明显的联系，εtr = βtn。无论利用应力(σ)如何，系数(n)随T的升高而升高;而(β)则因生长(T)和/或应力(σ)而减小。(NPs)。
{"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}
Pub Date : 2022-07-27DOI: 10.21608/ejs.2022.145459.1037
S. Elashry, H. Elsaeed, N. El-siragy
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
{"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}
Pub Date : 2022-07-01DOI: 10.21608/ejs.2022.111426.1031
Tarek Elarasasi, Maha A. Atallah, Mervat Elshaarawy, N. Shash
{"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}
Pub Date : 2022-07-01DOI: 10.21608/ejs.2022.142284.1036
Z. Khalifa, M. Shaban, M. Zayed
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.
{"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}
Pub Date : 2021-12-30DOI: 10.21608/ejs.2021.99837.1024
A. Ghoneim
{"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}
Pub Date : 2021-11-29DOI: 10.21608/ejs.2021.100187.1025
Ali Ibrahim, M. Ramadan, Ahmed Elsebaei, Hassan Elgohary, A. AbdEldayem
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.
{"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}
Pub Date : 2021-11-09DOI: 10.21608/ejs.2021.92116.1018
M. Abdelfatah, H. Salah, Mabrok Bakry, Walid Ismail, A. El-Shaer, S. Abdelgawad
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Pub Date : 2021-11-08DOI: 10.21608/ejs.2021.101958.1027
T. Abdallah, Hend Awad, H. Talaat
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.
{"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}
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