Gazi University Journal of Science Part A: Engineering and Innovation最新文献_第10页

Production and Characterization of Bilayer Tissue Scaffolds Prepared with Different Alginate-Salts and Fibroin 不同海藻酸盐和丝素制备双层组织支架的制备及表征

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-06-26 DOI: 10.54287/gujsa.1107158

Özge Çelik, S. A. Mohamed, Nuray Emin

{"title":"Production and Characterization of Bilayer Tissue Scaffolds Prepared with Different Alginate-Salts and Fibroin","authors":"Özge Çelik, S. A. Mohamed, Nuray Emin","doi":"10.54287/gujsa.1107158","DOIUrl":"https://doi.org/10.54287/gujsa.1107158","url":null,"abstract":"The presented study aimed to design and characterize bilayer Alginate/Fibroin scaffolds to provide faster and higher quality treatment of skin tissue losses with tissue engineering approach. In this context, it was tried to form the dermis and epidermis layers with alginate salts (sodium and calcium) and fibroin with a biomimetic approach, and it was aimed to determine the most suitable alginate salt-fibroin composite scaffold by trying different production methods. The optimum design was determined by macroscopic measurement and dimensional analysis of the scaffolds produced by four different methods and their chemical structures were controlled with FTIR. Among the produced scaffolds, calcium alginate/fibroin (CaAlg/Fb) scaffolds were determined to have the most suitable morphological and chemical structure. With further characterization, the pore distribution and size were examined by SEM analysis and it was determined that surface pore diameters vary from 30 µm to 300 µm which are suitable for cell settlement. The thermal stability of the structure was determined by thermal gravimetry, and the degradation rate was calculated from the thermograms. According to the TG analysis, decomposition of the CaAlg/Fb scaffolds occurs much faster with temperature than homo-biopolymeric (CaAlg and Fb) structures. As a result, it was found that bilayer CaAlg/Fb scaffolds were capable of forming full-thickness dermal and/or also osteochondral wound dressings both morphologically and structurally. It is recommended to perform the tissue forming ability of this scaffold structure by performing advanced biological analyzes.","PeriodicalId":134301,"journal":{"name":"Gazi University Journal of Science Part A: Engineering and Innovation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123957025","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

Amalgamated Rings with n-UJ-Properties 具有n- uj性质的合并环

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-06-25 DOI: 10.54287/gujsa.1106287

Tufan Özdi̇n, Esra Memi̇şoğullarindan

引用次数: 0

Computer aided simulation with finite element analysis of the effect of face mask use against COVID-19 and other infections 通过有限元分析对使用口罩预防 COVID-19 和其他感染的效果进行计算机辅助模拟

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-06-21 DOI: 10.54287/gujsa.1083882

Canan İnal, Kadir Gök, H. D. Ada, S. Inal, A. Gök

引用次数: 0

Investigation of Arsenic Content in Field Pesticides using inductively coupled plasma optical emission spectroscopy (ICP-OES) 电感耦合等离子体发射光谱法测定田间农药中砷含量

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-06-10 DOI: 10.54287/gujsa.1100870

Şükrü Kalayci

引用次数: 2

Moringa oleifera (Lam.) and Momordica charantia (Lam.¬) as Potential Larvicides and Fumigants of Culex Mosquitoes 辣木(Lam.)和苦瓜(Lam.)对库蚊的潜在杀幼虫剂和熏蒸剂

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-06-09 DOI: 10.54287/gujsa.1079339

O. Afolabi, A. Olonisakin

{"title":"Moringa oleifera (Lam.) and Momordica charantia (Lam.¬) as Potential Larvicides and Fumigants of Culex Mosquitoes","authors":"O. Afolabi, A. Olonisakin","doi":"10.54287/gujsa.1079339","DOIUrl":"https://doi.org/10.54287/gujsa.1079339","url":null,"abstract":"Mosquitoes cause life threatening diseases such as yellow fever, malaria, filariasis, encephalitis infection etc. The focus of this research is to evaluate the larvicidal and fumigant properties of Moringa oleifera and Momordica charantia extracts on the larvae and adult mosquitoes. The leaves of both plants were dried and pulverized into fine powder. Rotary evaporator was used to extract the plant oils. The results showed that Momordica charantia was more effective as larvicide than Moringa oleifera as its evoked 100% larval mortality at 20% concentration for 3 hours with LC50 and LC90 of 0.5% and 8.5% respectively. Moringa oleifera produced 100% larval mortality and LC50 (0.75%) and LC90 (10%) at 25% concentration for 4 hours. Similarly, the leaf extract of Momordica charantia is a better fumigant than Moringa oleifera, the former produced LC50 of 0.5% and LC90 of 3.75%, while the latter produced LC50 and LC90 of 1.05% and 4.25% respectively. The significantly higher larvicidal and fumigant activities observed in Momordica charantia is due to the presence of cardiac glycosides only in the plant in addition to saponins, tannins, flavonoids and alkaloids which are common to both plants. Therefore botanicals are advocated to be included in vector control programs. This is because botanicals are relatively safe, cheap and easy to obtain in many parts of the world.","PeriodicalId":134301,"journal":{"name":"Gazi University Journal of Science Part A: Engineering and Innovation","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127534837","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

Radiochemical Procedure for Measurement Specific Activities of Uranium Isotopes in Asphaltite Bioleaching Liquor by Alpha-Particle Spectrometry 用粒子光谱法测定沥青质生物浸出液中铀同位素比活度的放射化学方法

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-06-08 DOI: 10.54287/gujsa.1117169

Meryem Seferinoğlu

引用次数: 0

An Approach on Developing a Dynamic Wind-Solar Map for Tracking Electricity Production Potential and Energy Harvest 一种跟踪电力生产潜力和能源收获的动态风能-太阳能地图的开发方法

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-06-07 DOI: 10.54287/gujsa.1085005

F. Salmanoğlu, N. Cetin

{"title":"An Approach on Developing a Dynamic Wind-Solar Map for Tracking Electricity Production Potential and Energy Harvest","authors":"F. Salmanoğlu, N. Cetin","doi":"10.54287/gujsa.1085005","DOIUrl":"https://doi.org/10.54287/gujsa.1085005","url":null,"abstract":"Increasing energy demand brings in technical, environmental and economic problems as the production processes evolve. In this parallel, many countries are trying to satisfy the increasing energy demand using renewable energy sources. The scope of this study is to develope a mathematical model and data monitoring-evaluation software for wind and solar renewable energy sources, which can dynamically evaluate meteorological data measurements and make more precise energy harvest estimation with the data obtained. It is aimed to create a web based “Dynamic Wind-Sun Map of Turkey”. Through the developed software; instant data can be analyzed and instantaneous electrical energy values produced from wind and solar energy sources can be calculated. Thus, it can help create a system that allows regional management in energy production and is compatible. Within the scope of the study, a mathematical model expressing the problem was created by using some mathematical optimization methods. The created model was converted into a web-based software. PHP software development platform and MySQL database language were used during the software creation. The software developed within the scope of the study has analogues in the world literature. However, no study has been found in this context in Turkey. Especially since it can use real-time data and includes wind-photovoltaic calculations together, this software distinguishes it from its peers.","PeriodicalId":134301,"journal":{"name":"Gazi University Journal of Science Part A: Engineering and Innovation","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124396144","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

Development and Performance Evaluation of a Variable-Pitch Tapered-Shaft Screw Press for Palm Oil Extraction 棕榈油压榨用变螺距锥轴螺旋压榨机的研制及性能评价

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-06-06 DOI: 10.54287/gujsa.1069996

K. Alabi, R. Busari, Oladimeji Joel

{"title":"Development and Performance Evaluation of a Variable-Pitch Tapered-Shaft Screw Press for Palm Oil Extraction","authors":"K. Alabi, R. Busari, Oladimeji Joel","doi":"10.54287/gujsa.1069996","DOIUrl":"https://doi.org/10.54287/gujsa.1069996","url":null,"abstract":"Palm fruit oil extraction is a difficult task to undertake. Screw press technology offers a solution to its extraction. However, most screw press available requires high power input for effective operation, thus affecting cost. Therefore, there is a need for improvement in order to limit cost and increase extraction efficiency. This work focuses on development of a variable-pitch tapered-shaft (VATS)screw pressfor enhancing palm fruit oil extraction efficiency. The VATS screw press machine consists of three main components including the hopper, the steamer, and the pressing unit, and was operated at temperature of 90, 110 and 130°C, shaft speed of 30, 45, and 60 rpm and heating time of 10, 15, 20 minutes. The performance evaluation carried on the machine includes oil yield, extraction efficiency and extraction loss. The results showed that the average oil yield, extraction efficiency and extraction loss were 83.72, 97.73 and 2.37% respectively. Whereas, a higher machine efficiency of 94.45% was obtained at a temperature of 130°C, shaft speed of 60 rpm, and heating time of 15 minutes. It is hoped that the information on the design concept for VATS screw press for palm fruit oil extraction will be useful for the vegetable oil industry.","PeriodicalId":134301,"journal":{"name":"Gazi University Journal of Science Part A: Engineering and Innovation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130024413","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

An Approach for Color Measurement of Irradiated Fresh Cilantro 辐照新鲜香菜颜色测定方法研究

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-03-28 DOI: 10.54287/gujsa.1082957

Pelin Yücel

引用次数: 0

Relationship Between Hydrocarbon Content and Oxidative Stability in Irradiated Hazelnut Oils 辐照榛子油中烃类含量与氧化稳定性的关系

Gazi University Journal of Science Part A: Engineering and Innovation Pub Date : 2022-03-28 DOI: 10.54287/gujsa.1084430

H. Güçlü

引用次数: 1