7th International Students Science Congress Proceedings Book最新文献

Engineering Applications of Polynomial Matrix Method: A Review 多项式矩阵法的工程应用综述

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.032

M. Çevik, Mehmet Sezer

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Alagöl Gölü Değişiminin Uzaktan Algılama ile Haritalanması

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.027

Altynay Abdrakhmanova

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Application of Spray Drying Process for Food Bioactive Compounds 喷雾干燥技术在食品生物活性化合物中的应用

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.024

E. Akca, Ö. Çağındı, E. Köse

{"title":"Application of Spray Drying Process for Food Bioactive Compounds","authors":"E. Akca, Ö. Çağındı, E. Köse","doi":"10.52460/issc.2023.024","DOIUrl":"https://doi.org/10.52460/issc.2023.024","url":null,"abstract":"In addition to the essential nutrients found in the structure of foods, some compounds that have positive effects on health are gradually taking their place in nutritional recommendations. Food-derived bioactive are known as these non-nutritional compounds and are secondary metabolites of plants consisting of vitamins, minerals, fatty acids, phytosterols, polyphenols, anthocyanins, carotenoids, probiotics, and bioactive peptides. There are difficulties in ensuring the stabilization of bioactive compounds that have positive effects on human health during production, product, and storage periods. Encapsulation techniques are used to preserve these compounds from decreased biological activity, interaction with environmental conditions, physicochemical and organoleptic adverse effects. Micro and/or nanoencapsulation are an effective method that increases the stabilization of bioactive food compounds and enables their use in food systems. Among encapsulation technologies, spray drying, which is cost-effective, is one of the most frequently used methods for micro- and nano-sized encapsulation of different bioactive compounds, especially for the encapsulation of heat-sensitive compounds. The aim of this study was to provide an overview of the micro/nanoencapsulation of food-derived bioactive compounds by spray drying with different encapsulation agents and to investigate oxidative stress, temperature effect, storage stability, bioavailability as well as the advantages and disadvantages of this method..","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129253943","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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Fig (Ficus carica) Valorization via ABE Fermentation into Organic Acids and Solvents 无花果(Ficus carica)通过ABE发酵成有机酸和溶剂的增值

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.012

W. Abibu, I. Karapınar

{"title":"Fig (Ficus carica) Valorization via ABE Fermentation into Organic Acids and Solvents","authors":"W. Abibu, I. Karapınar","doi":"10.52460/issc.2023.012","DOIUrl":"https://doi.org/10.52460/issc.2023.012","url":null,"abstract":"The concern on the adverse environmental effects of global warming and fossil fuel challenged human intellect to find renewable, sustainable and environmentally friendly fuel substitutes. This was fully supported by governmental and non-governmental organizations across the globe. The fig (Ficus carica) is an edible Mediterranean fruit that is abundantly cultivated in Turkiye. Waste figs are carcinogenic and toxigenic. Thus, it’s a good option to converting it into value added products. The main objective of this research is to study the effects of cations (Zn2+, Mg2+ and Mn+ ) and electron mediators (Neutral red and Methyl viologen) on the acetogenesis and solventogenesis stages of the ABE process. One factor at a time (OFAT) simple experimental design was employed in this study. Organicacids (lactic, acetic and butyric acid) and organic solvents (ethanol, acetone and butanol) are the main product of the ABE (Acetone-Butanol-Ethanol) fermentation. From the results, maximum concentrations of Lactic, acetic, butyric acid, ethanol, acetone and butanol were recorded at MV15(mg/L), Mg400(mg/L), Mg400 (mg/L) NR15(mg/L), Mn56(mg/L), and MV15(mg/L) respectively.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133337114","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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Green Biosynthesis of Silver Nanoparticles from Wild Mushroom (Ganoderma lucidum) First Time in Iraq 绿色生物合成纳米银的野生蘑菇(灵芝)首次在伊拉克

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.054

S. Sadiq, Sara Qahtan Sulaiman

{"title":"Green Biosynthesis of Silver Nanoparticles from Wild Mushroom (Ganoderma lucidum) First Time in Iraq","authors":"S. Sadiq, Sara Qahtan Sulaiman","doi":"10.52460/issc.2023.054","DOIUrl":"https://doi.org/10.52460/issc.2023.054","url":null,"abstract":"Nowadays there is an increasing interests about nanoparticle due to its application in medical and industrial products, green rout and safely producing of nanoparticles consider important for recent life technology, silver nanoparticles (AgNPs) one of the most safe compound to human and environment due to its low effect an low toxicity even with direct contacting and consuming release low particles of silver, for these reasons , the availability and low costing technology we produced silver nanoparticles from eco-friendly mushroom G. lucidum first time in Iraq. AgNPs were prepared by using aqueous extract of G. lucidium as a reducing agent for silver nitrate (AgNO3). The characteristics of silver- anoparticles were determined, including: Determining the highest absorption of silver nanoparticles by UV-VIS spectrophotometer, the shape and size of silver nanoparticles by atomic force microscopy (AFM), as well as determining the type of chemical bonds or functional groups bound to the prepared AgNPs by Fourier-transform infrared spectroscopy-FTIR. Scanning Electron Microscopy used for study of Particle size and shape. The results showed the emergence of a spectral imaging beam using a spectrophotometer that ranged between 350-900 nm, where the best absorption beam was at a wavelength of 450 nm, while the result of AFM showed the surface topography of silver nanoparticles with an average size of 62.78 nm. FTIR spectrum revealed strong absorption peaks 1091-3434 cm-1, as well as their role in the stability of these molecules. The size of spherical particles ranged between 17.15 - 25.81 nanometers under SEM.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"25 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131320039","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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A New Method for Elliptic Partial Differential Equations 求解椭圆型偏微分方程的一种新方法

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.030

Nurcan Baykuş Savaşaneril

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Auxetic Thin-Walled Square Tubes Subjected to Oblique Loading 倾斜载荷作用下的补体薄壁方管

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.035

Dilek Atilla Yolcu, Fatih İlgen, B. O. Baba

{"title":"Auxetic Thin-Walled Square Tubes Subjected to Oblique Loading","authors":"Dilek Atilla Yolcu, Fatih İlgen, B. O. Baba","doi":"10.52460/issc.2023.035","DOIUrl":"https://doi.org/10.52460/issc.2023.035","url":null,"abstract":"The use of auxetic structures with a negative Poisson’s ratio in thin-walled tubes, which are widely used in many fields, is one of the topics discussed recently. This is because re-entrant auxetic tubes are generally more resistant to loads such as compression and impact than conventional honeycomb structures due to their high indentation resistance. However, there is limited information in the literature regarding the use of these structures on different sides of the thin-walled tube. In addition, there are few studies on how the compressive behavior of the re-entrant auxetic structure changes when subjected to an oblique load. In this study, the effect of oblique loading on thin-walled square tubes with re-entrant and traditional honeycomb structures on the sides was investigated numerically. The side faces of the tubes were designed using auxetic re-entrant and conventional honeycomb cells with constant ligament properties. Four different types of square tubes were created with the designed re-entrant auxetic and conventional honeycomb side faces. These structures are; all side faces re-entrant (RRRR), all side faces honeycomb (HHHH), opposite side faces re-entrant-honeycomb (RHRH), and adjacent side faces re-entrant-honeycomb (RRHH). Oblique loads were applied to the edges and corners of these structures and their behavior was examined. The results showed that the use of different lattice structures on the thin-walled tubes significantly affected their behavior.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122970522","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

Dynamic Compressive Behavior of Glass/Epoxy Composites Using Split Hopkinson Pressure Bar 用分离式霍普金森压力棒研究玻璃/环氧复合材料的动态压缩性能

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.042

Aidel Kadum Jassim Al-Shamary, Abdulrahman N. Abed, R. Karakuzu

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Antibiotics Abuse: A Common Phenomenon in Nigeria and Pakistan 抗生素滥用:尼日利亚和巴基斯坦的普遍现象

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.011

W. Abibu, A. O. Kolawole, G. Bamigbade, A. Sakariyau, Oluwaseun Isaac Oyelami, A. Javed

{"title":"Antibiotics Abuse: A Common Phenomenon in Nigeria and Pakistan","authors":"W. Abibu, A. O. Kolawole, G. Bamigbade, A. Sakariyau, Oluwaseun Isaac Oyelami, A. Javed","doi":"10.52460/issc.2023.011","DOIUrl":"https://doi.org/10.52460/issc.2023.011","url":null,"abstract":"Antibiotics abuse remains a global health concern adversely affecting developing and developed nations of the world. Antibiotics are meant to achieve a static or cidal effect on targeted bacteria. However, antibiotics abuse prevents the intended results for its use. Uncontrolled dosage and negligence of prescription from qualified medical practitioners remain the major source of antibiotics abuse. The ffects may be life threatening and may eventually lead to death. This study takes a look at resident’s awareness of antibiotics abuse and its effects. Nigeria and Pakistan (most populated nations in West Africa and South Asia respectively) were the research areas used in the survey. The research involved 1000 respondents. 52.6% of the respondents were females while 46.8% were male out of which the highest age group (48.6%) of respondents falls within 21 to 30. Almost all respondents are aware of the role of antibiotics in disease treatment and 82.2% respondents have taken antibiotics in the last 12 months against infections ranging from Sexually Transmitted Diseases (STDs), Coughs and many more. From the survey, more than 70% of the participants attested to using antibiotics without prescription from a qualified physician. Furthermore, 20% of respondents have been hospitalized for antibiotics abuse. The study showed that antibiotics abuse is still a menace ravaging our society. We therefore recommend that health regulatory authorities in these countries to emulate the measures put in place by developed nations to eradicate this menace in our society.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122192899","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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Experimental Investigations on the Thermal Performance of an Office-Type Heat Recovery Ventilation System 办公室式热回收通风系统热性能的实验研究

7th International Students Science Congress Proceedings Book Pub Date : 2023-07-19 DOI: 10.52460/issc.2023.037

Ş. Güngör, Veli Sabancı

{"title":"Experimental Investigations on the Thermal Performance of an Office-Type Heat Recovery Ventilation System","authors":"Ş. Güngör, Veli Sabancı","doi":"10.52460/issc.2023.037","DOIUrl":"https://doi.org/10.52460/issc.2023.037","url":null,"abstract":"Considering the global energy crises and climate change, the importance of energy recovery grows day by day. At this point, heat recovery ventilation (HRV) systems contribute energy saving by the help of heat exchange in between the cold and hot air streams. Furthermore, the Covid-19 pandemic shows us that ventilation is an inevitable part of heating, ventilation, air-conditioning and refrigeration (HVAC-R) systems to satisfy indoor air quality within the subregions of human-living constructions. In this experimental work, we use an industrial HRV system to examine the thermal performance under various air flow rates. The HRV unit mainly contains cold and hot stream fans, crossflow heat exchanger, air filter, and flow rate controller. The thermal scenarios are considered under winter climate conditions; therefore, temperature levels of the fresh and exhaust air streams are determined about 280K and 300K, respectively. In addition, thermal investigations are conducted with different mass flow rates. The temperatures are measured via thermocouples and collected by a precise multi-channel data logger. The results indicate that the investigated HRV system contribute both indoor air quality (complies with ASHRAE 62.1 standard) and reduction of air conditioning energy consumption.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132239682","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