Communications in Science and Technology最新文献_第4页

Utilization of glycerol solution for hydrogen production by a combination of photocatalysis and electrolysis processes with Fe-TiO2 nanotubes 通过结合使用 Fe-TiO2 纳米管的光催化和电解过程利用甘油溶液制氢

Communications in Science and Technology Pub Date : 2023-12-31 DOI: 10.21924/cst.8.2.2023.1280

Calvin Santoso, Ratnawati, Slamet

{"title":"Utilization of glycerol solution for hydrogen production by a combination of photocatalysis and electrolysis processes with Fe-TiO2 nanotubes","authors":"Calvin Santoso, Ratnawati, Slamet","doi":"10.21924/cst.8.2.2023.1280","DOIUrl":"https://doi.org/10.21924/cst.8.2.2023.1280","url":null,"abstract":"A combination of photocatalysis and electrolysis (photoelectrocatalysis) for the simultaneous degradation of glycerol and hydrogen production using Fe-TiO2 nanotubes has been studied. This photocatalyst was synthesized through Ti anodization followed by Fe deposition with Fe(NO3)3 as precursor using the SILAR (successive ionic layer adsorption and reaction) method. The effects of Fe loading (based on the number of SILAR cycles) on TiO2 nanotubes and glycerol concentration were examined. The generated TiO2 nanotubes were 100% anatase phase with crystallite size between 25 and 29 nm. The results of UV-Vis DRS showed that the number of SILAR cycles of Fe dopant determined the magnitude of the decrease in the band gap of photocatalysts up to 2.74 eV, notably lower than a typical value of 3.15 eV associated with TiO2 anatase. FESEM/EDX, TEM, and HRTEM characterizations indicated the formation of neatly arranged TiO2 nanotubes with Fe deposited on the surface. The photoelectrocatalytic process increased the hydrogen produced by up to 5 times compared to a single photocatalytic or electrolysis process. The photocatalyst sample with Fe deposited on TiO2 nanotubes via a SILAR method with 15 cycles outperformed its bare TiO2 nanotube counterpart by producing hydrogen by 2.5 times (405.8 mmol/m2). Glycerol photo-reforming at 10% concentration produced hydrogen 6 times greater than water splitting (0% glycerol).","PeriodicalId":36437,"journal":{"name":"Communications in Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139134534","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

Low-energy extraction of lignocellulose nanofibers from fresh Musa basjoo pseudo-stem 从新鲜芭蕉假茎中低能提取木质纤维素纳米纤维

Communications in Science and Technology Pub Date : 2023-12-31 DOI: 10.21924/cst.8.2.2023.1211

Erna Mayasari, S. Fukugaichi, E. Johan, N. Matsue

{"title":"Low-energy extraction of lignocellulose nanofibers from fresh Musa basjoo pseudo-stem","authors":"Erna Mayasari, S. Fukugaichi, E. Johan, N. Matsue","doi":"10.21924/cst.8.2.2023.1211","DOIUrl":"https://doi.org/10.21924/cst.8.2.2023.1211","url":null,"abstract":"This study presents a novel approach for the extraction of cellulose nanofibers (CNF) and lignocellulose nanofibers (LCNF) from Musa basjoo pseudo-stems, a relative of bananas, without the need for extensive drying. Instead, wet pseudo-stems were compressed and treated with NaOH solutions at varying temperatures and durations. The extracted material exhibited the characteristic peaks of cellulose I in X-ray diffraction (XRD) patterns, similar to those obtained from dried pseudo-stems. Fourier-transform infrared (FT-IR) spectroscopy confirmed the presence of cellulose I in the treated material and lignocellulose nanofiber clearly shown at 1600-1500, 1421, 1365, and 1161 cm-1. Composition analysis by Van Soest fiber analysis revealed a higher cellulose content in the treated material of wet pseudo-stems compared to that obtained from dried pseudo-stems, indicating the effectiveness of this low-energy extraction method. Meanwhile, field-emission scanning electron microscopy (FE-SEM) images demonstrated clear LCNF in the nanometer scale fibers after NaOH treatment. Overall, this study successfully demonstrated the extraction of LCNF from wet pseudo-stems of Musa basjoo with NaOH treatment at 70°C for 3 hours with 80% extraction result, providing a more efficient and low-energy approach for utilizing waste from Musa basjoo and bananas.","PeriodicalId":36437,"journal":{"name":"Communications in Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139134632","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 viability and survival of free and maltodextrin microencapsulated Bifidobacterium animalis subsp. animalis through spray-drying process 通过喷雾干燥工艺评估游离和麦芽糊精微胶囊动物双歧杆菌亚种的活力和存活率

Communications in Science and Technology Pub Date : 2023-12-31 DOI: 10.21924/cst.8.2.2023.1239

E. Corpas-Iguarán, Jessica Triviño-Valencia, Omar Tapasco-Alzate, Y. A. Garcés-Gómez

{"title":"Evaluation of viability and survival of free and maltodextrin microencapsulated Bifidobacterium animalis subsp. animalis through spray-drying process","authors":"E. Corpas-Iguarán, Jessica Triviño-Valencia, Omar Tapasco-Alzate, Y. A. Garcés-Gómez","doi":"10.21924/cst.8.2.2023.1239","DOIUrl":"https://doi.org/10.21924/cst.8.2.2023.1239","url":null,"abstract":"Bifidobacterium animalis subsp. animalis is a microorganism integrated into the human intestinal microbiota and performs a probiotic function through mechanisms that promote the absorption of nutrients, the modulation of the immune system, and the production of lactic acid, among other aspects. Microencapsulation using maltodextrin promotes the protection of microorganisms against physical and chemical factors, improving viability over time. Bifidobacterium animalis subsp. animalis was microencapsulated through spray-drying using maltodextrin. Survival under pH conditions, bile salts, and temperature were evaluated as well as its viability during storage conditions. The viability of the encapsulated agent stored at 25 °C remained high and constant during the first three weeks. The results for free and microencapsulated thermal tolerance showed an important difference among survival percentages of each tested temperature, and microencapsulation showed a protective effect against temperatures like or lower than 55 °C. Regarding pH 2.5 exposure for 3h, there is a survival of 5.38% for free microorganisms in contrast to 11.87% for encapsulated, whereas in a pH 3.5 for 3h, the encapsulated agent showed a survival of 23%. The results obtained from encapsulated cells stressed with a 1g/L concentration of bile salts showed a survival of 19%, while free cells presented a total loss of viability when subjected for 3h at the same concentration. Microencapsulated Bifidobacterium animalis subsp. animalis demonstrated potential for its use incorporated into foods, but it is necessary to improve viability conditions during storage and survival under gastric stress conditions.","PeriodicalId":36437,"journal":{"name":"Communications in Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139136108","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

A systematic review of breast cancer detection on thermal images 热图像乳腺癌检测系统综述

Communications in Science and Technology Pub Date : 2023-12-31 DOI: 10.21924/cst.8.2.2023.1270

Aqil Aqthobirrobbany, Dian Nova, Kusuma Hardani, Indah Soesanti, Adi Nugroho

{"title":"A systematic review of breast cancer detection on thermal images","authors":"Aqil Aqthobirrobbany, Dian Nova, Kusuma Hardani, Indah Soesanti, Adi Nugroho","doi":"10.21924/cst.8.2.2023.1270","DOIUrl":"https://doi.org/10.21924/cst.8.2.2023.1270","url":null,"abstract":"Breast cancer poses a substantial global health concern, primarily regarding its impact on women. Thermal imaging has emerged as a promising tool for early detection with notable technological advancements between 2013 and 2023 in enhancing diagnostic capabilities. However, existing literature reviews often lack adherence to specific scholarly standards and may provide incomplete insights into research trends. This systematic literature review (SLR) addresses these issues by comprehensively analyzing research trends, publication types, contributions, datasets, methodologies, and effective approaches for breast cancer detection using thermal imaging. The review encompasses an examination of 40 articles from reputable digital libraries, revealing a predominant emphasis on deep learning algorithms among 25 applied methods. These algorithms consistently achieve commendable performance, frequently surpassing 90% accuracy rates. Consequently, current research in breast cancer detection via thermal imaging is marked by a strong focus on artificial intelligence, particularly machine and deep learning, recognized as the most promising and effective avenues for investigation.","PeriodicalId":36437,"journal":{"name":"Communications in Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139135218","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

Removal of trisacryl red using hydrogels composites based on chitosan 使用基于壳聚糖的水凝胶复合材料去除三聚氰胺红

Communications in Science and Technology Pub Date : 2023-12-31 DOI: 10.21924/cst.8.2.2023.1278

H. Sebti, Nihel Dib, F. Z. Sebba, B. Bounaceur

引用次数: 0

Evaluating hydrogen production from glucose using graphite felt beads as a solid matrix in immobilized mixed cell reactor at thermophilic fermentation 在嗜热发酵固定化混合细胞反应器中使用石墨毡珠作为固体基质评估葡萄糖制氢效果

Communications in Science and Technology Pub Date : 2023-12-31 DOI: 10.21924/cst.8.2.2023.1238

Ibdal Ssatar, M. I. Salehmin, Mimi Hani Abu Bakar, W. R. Wan Daud, Ika Dyah Kumalasari, Muhammad Aziz, Mahendara Rao Somalu, Byung Hong Kim

引用次数: 0

Cigarette filter butts-derived activated carbon with free binder electrode design for solid-state supercapacitor application 用于固态超级电容器应用的烟头滤嘴衍生活性炭与游离粘合剂电极设计

Communications in Science and Technology Pub Date : 2023-12-31 DOI: 10.21924/cst.8.2.2023.1252

Yanuar Hamzah, E. Taer, A. Apriwandi, F. L. Supian, N. Mozaffari, N. Mozaffari

引用次数: 0

Preparation of Mo-impregnated mordenite catalysts for the conversion of refined kernel palm oil into bioavtur 制备用于将精炼棕榈仁油转化为生物柴油的钼浸莫代石催化剂

Communications in Science and Technology Pub Date : 2023-12-31 DOI: 10.21924/cst.8.2.2023.1288

W. Trisunaryanti, Triyono, Karna Wijaya, I. Kartini, S. Purwono, Rodiansono, A. Mara, Amsal Budiyansah

引用次数: 0

Effect of multi-walled CNTs polyurethane mats lamination with basalt fabrics reinforced-epoxy composites reviewed on tension and bending properties 玄武岩织物增强环氧复合材料与多壁碳纳米管聚氨酯复合垫复合对拉伸和弯曲性能的影响

Communications in Science and Technology Pub Date : 2023-07-11 DOI: 10.21924/cst.8.1.2023.1195

N. Sugiarti, K. Atmika, I. D. Subagia

{"title":"Effect of multi-walled CNTs polyurethane mats lamination with basalt fabrics reinforced-epoxy composites reviewed on tension and bending properties","authors":"N. Sugiarti, K. Atmika, I. D. Subagia","doi":"10.21924/cst.8.1.2023.1195","DOIUrl":"https://doi.org/10.21924/cst.8.1.2023.1195","url":null,"abstract":"Material technology continues to develop with various innovations and engineering to improve weaknesses in both mechanical and physical properties. In this study, electrospun fibres containing a multi-wall blend of CNT and Polyurethane (PU) with or without surfactant that laminated into a basalt fibre-reinforced composite were uniquely demonstrated. Multi-wall CNT 3wt% was added to the PU/MEK/DMF solution and produced using an electrospinning process. PU fibre mat containing 3wt% CNT was made without and with surfactants. Also, Basalt fibre reinforced epoxy composite as a control sample was produced. In addition, vacuum-assisted resin transfer printing has been used in the manufacture of composite panels containing both fibres. The aim of combining basalt fibre and PU CNT spun mats was to investigate their effect on the tensile and flexural mechanical properties. Tensile and flexural tests were carried out on a universal testing machine (UTM) in accordance to ASTM D 638 and ASTM D790 standards. FESEM and TEM on composite morphology test were done after testing. The results indicated that the basal matting fibre-reinforced epoxy composites stacked by PU mats with or without surfactants were affected by CNT inclusions. Nanofiber spun mats laminated in a basalt fibre composite lead to a considerable increase in both loads (i.e. tensile and flexural properties). The highest tensile and flexural load values occurred in the BF+PU-mat-2 sample with triton-x 100 surfactants compared to BFRP. The increase in tensile and flexural modulus values was at 13% and 17.3%, respectively. On the other hand, there was a decrease in shear failure due to tensile and bending loads due to the brittleness of the composite reinforcement. In conclusion, this CNF-mat lamination is highly suitable to be used to improve the strength properties of BFRP composites. It is highly recommended for automotive parts, marine compartments and storage insulation.","PeriodicalId":36437,"journal":{"name":"Communications in Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46686401","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

Fabrication of glutathione-modified gold nanoparticles as 3-chloropropane-1,2-diol sensor 谷胱甘肽修饰金纳米粒子作为3-氯丙烷-1,2-二醇传感器的制备

Communications in Science and Technology Pub Date : 2023-07-11 DOI: 10.21924/cst.8.1.2023.1167

Y. Faramitha, Fadhlurrahman Rafi Barori, F. Dimawarnita, Siswanto, Havid Aqoma, A. Nugraha, A. Ferdiansyah

引用次数: 0