Dutse Journal of Pure and Applied Sciences最新文献_第7页

Energy Convergence in a Structure Optimization and Vibrational Modes of Some Acene Molecules 结构优化中的能量收敛和一些烯分子的振动模式

Dutse Journal of Pure and Applied Sciences Pub Date : 2024-04-24 DOI: 10.4314/dujopas.v10i1c.30

Kassim L. Ibrahim, G. Babaji, G. Galadanci, Raymond C. Abenga, H.U. Jamo

{"title":"Energy Convergence in a Structure Optimization and Vibrational Modes of Some Acene Molecules","authors":"Kassim L. Ibrahim, G. Babaji, G. Galadanci, Raymond C. Abenga, H.U. Jamo","doi":"10.4314/dujopas.v10i1c.30","DOIUrl":"https://doi.org/10.4314/dujopas.v10i1c.30","url":null,"abstract":"Acene molecules, exhibit interesting electronic and structural properties due to the presence of alternating single and double bonds. There has been a recent surge in interest in studying small acenes, such as anthracene, tetracene, and pentacene. Geometry optimization and energy convergence for acene molecules are essential steps in understanding their properties and behavior. The modellings of MJs was done using Jmol computer code and the geometry of these structures was relaxed towards its minimum energy using a two-step procedures which are; pre-relax the structure with light settings and post-relaxation run using tight settings down to 10-2 eV/Å stopping criteria. The results showed that total energy uncorrected and the maximum force converged. The converged energies for anthracene, tetracene and pentacene molecules are, 0.0057 eV/Å, 0.0056 eV/Å, and 0.0060 eV/Å respectively. For the vibrational analysis, some of the results indicated that the input geometry is indeed a local minimum and not a saddle point. The results also showed a low IR absorption, with maximum intensity of 1.83 D2Å-2, 2.00 D2Å-2, and 1.91 D2Å-2 for anthracene, tetracene, and pentacene respectively. ","PeriodicalId":479620,"journal":{"name":"Dutse Journal of Pure and Applied Sciences","volume":"36 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140661078","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

Evaluation of Indoor and Outdoor Radiation Levels and its Health Hazard at Dennis Osadebay University, Asaba, Delta State, Nigeria 评估尼日利亚三角洲州阿萨巴市丹尼斯-奥萨德贝大学的室内外辐射水平及其对健康的危害

Dutse Journal of Pure and Applied Sciences Pub Date : 2024-04-24 DOI: 10.4314/dujopas.v10i1c.2

E.O. Esi, A. O. Nwabuoku, E.C. Oduah, F.O. Ugbede, J.C. Okpilike

{"title":"Evaluation of Indoor and Outdoor Radiation Levels and its Health Hazard at Dennis Osadebay University, Asaba, Delta State, Nigeria","authors":"E.O. Esi, A. O. Nwabuoku, E.C. Oduah, F.O. Ugbede, J.C. Okpilike","doi":"10.4314/dujopas.v10i1c.2","DOIUrl":"https://doi.org/10.4314/dujopas.v10i1c.2","url":null,"abstract":"This research designed at evaluating the indoor and outdoor background ionizing radiation dose equivalent levels at Dennis Osadebay University, Asaba Delta state. The study was carried out at fifteen different locations around the university campus using a portable GQ GMC-320 detector to measure outdoor and indoor equivalent dose rate of the university campus. The mean values of outdoor and indoor equivalent dose rate obtained are 0.135 μSv/hr and 0.142 μSv/hr respectively. These mean values are vaguely lower compared to 0.274 µSv/hr world average limit. The mean values of annual effective radiation equivalent (AEDE) of outdoor and indoor are 0.788 mSv/y and 0.142 mSv/y respectively. Similarly, 2.153 and 0.716 are the obtained values for excess lifetime cancer risk (ELCR) outdoor and indoor around the university respectively. The calculated dose to organs showed that the testes have the highest organ dose of (0.533 and 0.039) mSv/y for indoor and outdoor respectively. The estimated AEDE around the university are below the permissible limit, while ELCR average values for both outdoor and indoor around the university exceeded the standard value. The implication of equivalent dose rate, AEDE and ELCR values is that the university environment appears to be safe from immediate radiation-related health effects due to BIR exposure. Nevertheless, the possibility that an individual may develop cancer over their lifetime within university environment. ","PeriodicalId":479620,"journal":{"name":"Dutse Journal of Pure and Applied Sciences","volume":"50 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140662290","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 Influence of Location on the Nutritional Composition of the Rind of Watermelon (C. lanatus) in Parts of Selected Geographical Zones in Nigeria 尼日利亚部分地区的地理位置对西瓜（C. lanatus）果皮营养成分的影响

Dutse Journal of Pure and Applied Sciences Pub Date : 2024-04-24 DOI: 10.4314/dujopas.v10i1b.32

U. E. Akporido, Israel Oghenevwodoko Okoro

{"title":"The Influence of Location on the Nutritional Composition of the Rind of Watermelon (C. lanatus) in Parts of Selected Geographical Zones in Nigeria","authors":"U. E. Akporido, Israel Oghenevwodoko Okoro","doi":"10.4314/dujopas.v10i1b.32","DOIUrl":"https://doi.org/10.4314/dujopas.v10i1b.32","url":null,"abstract":"Watermelon (C.lanatus)), which was formerly only grown in the Northern part of Nigeria, is now grown in Southern parts also. It is known that weather patterns and soil composition vary as we move from the northern to the southern parts of Nigeria. However, there is little to no data demonstrating how C.lanatus' nutritional composition is influenced by its geographic location. This study therefore sought to assess the nutritional composition of the rind of C.lanatus produced in parts of four states that corresponded to four geopolitical areas of Nigeria. Samples of C. lanatus were gathered from four geopolitical zones of Nigeria which include; North-East, South-West, South-East, and SouthSouth. Fruits were cleaned before the rind was removed, blended, and freeze-drying carried out. The freeze-dried samples were subjected to established methods for the determination of the amino acid profile, vitamins, proximate, and mineral components. The results of the amino acid profile showed that distinct amino acids were present in each zone, with the southwest sample providing the highest quantities and the south-south zone providing the lowest concentrations. The rind of C. lanatus contained calcium, magnesium, potassium, sodium, iron, phosphorus, and manganese in varying amounts, and samples from the south- west and north-east having the highest concentrations of both vitamins and minerals. The results of the proximate composition determination showed that the southwest sample had the highest (p < 0.05) percentage of moisture, protein, and ash when compared to other zones, and that the northeast sample had a higher percentage composition of carbohydrate, ash, and fat when compared to other zones. Thus, the C. lanatus samples' nutritional value were distributed as follows: southwest > northeast > southeast > south-south. According to the findings, C.lanatus rind's nutritional qualities can vary depending on where it is cultivated. ","PeriodicalId":479620,"journal":{"name":"Dutse Journal of Pure and Applied Sciences","volume":"41 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140662922","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

Modeling and Bulk Characterization of 4HSIC Radiation Detector in Sentaurus TCAD Simulation Environment 在 Sentaurus TCAD 仿真环境中对 4HSIC 辐射探测器进行建模和批量表征

Dutse Journal of Pure and Applied Sciences Pub Date : 2024-04-24 DOI: 10.4314/dujopas.v10i1c.19

I.I. Garba, R. Nasiru, Y.M. Abubakar, U. Shehu

{"title":"Modeling and Bulk Characterization of 4HSIC Radiation Detector in Sentaurus TCAD Simulation Environment","authors":"I.I. Garba, R. Nasiru, Y.M. Abubakar, U. Shehu","doi":"10.4314/dujopas.v10i1c.19","DOIUrl":"https://doi.org/10.4314/dujopas.v10i1c.19","url":null,"abstract":"This paper gives an insight into the need for radiation detection and the most commonly flexible and efficient radiation detector. It also examines bulk characteristics of 4H-SiC semiconductor radiation detector with Ni and Ti as metals for the contact. Bulk characterization of the device, including: doping concentration, electrons and holes behaviors, space charge and current densities were carried out. The modeling is conducted using Sentaurus Technology Computer Aided Design (TCAD) to examine charge transport in bulk 4HSiC material. Data obtained were further analyzed through Sentaurus visual, sentaurus Techplot and Excel to clearly determine the characteristics of the device. It is observed that when the semiconductor and metal are in contact, the Fermi-level is established where the doping concentration varied with either magnitude of the doping concentration or nature of the dopant. Similarly, Schottky and ohmic contacts and temperature effect were observed from the device characteristics which demonstrate that, the detector can withstand a temperature from the range of 100K to 700K in no fluctuating state. ","PeriodicalId":479620,"journal":{"name":"Dutse Journal of Pure and Applied Sciences","volume":"58 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140664569","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