Indonesian Journal of Science and Technology最新文献_第4页

Oil Palm Empty Fruit Bunch Waste Pretreatment with Benzotriazolium-Based Ionic Liquids for Cellulose Conversion to Glucose: Experiments with Computational Bibliometric Analysis 苯并三唑基离子液体预处理油棕空果束纤维素转化为葡萄糖:计算文献计量学分析实验

Indonesian Journal of Science and Technology Pub Date : 2022-05-09 DOI: 10.17509/ijost.v7i2.50800

A. Mudzakir, K. M. Rizky, H. Munawaroh, Dhesy Puspitasari

{"title":"Oil Palm Empty Fruit Bunch Waste Pretreatment with Benzotriazolium-Based Ionic Liquids for Cellulose Conversion to Glucose: Experiments with Computational Bibliometric Analysis","authors":"A. Mudzakir, K. M. Rizky, H. Munawaroh, Dhesy Puspitasari","doi":"10.17509/ijost.v7i2.50800","DOIUrl":"https://doi.org/10.17509/ijost.v7i2.50800","url":null,"abstract":"This study aims to utilize benzotriazolium salt-ionic liquids (ILs) as solvents in the oil palm empty fruit bunch (EFB) waste pretreatment along with bibliometric analysis using VOSviewer. Three ILs have been synthesized and tested as EFB solvents by a microwave-heating method. Those are organic salts of 1,3-methyl-octyl-1,2,3-benzotriazolium ([MOBzt]+) cation with three kinds of anions such as bromide ([Br]-), acetate ([CH3COO]-), and thiocyanate ([SCN]-). The bibliometric analysis showed that new research needs to be conducted to improve the development of research relating to biomass pretreatment. The highest solubility of EFB is in [MOBzt]CH3COO is about 7,5% w/w. The effect of anions on the ability to dissolve EFB is CH3COO-SCN-Br-. When subject to ILs pretreatment, EFB exhibited increased cellulose crystallinity, changed in the structure of cellulose I to cellulose II, reduced particle size, and decreased lignin content compared to untreated one, improving the glucose yield from enzymatic hydrolysis. The highest glucose yield (1,237 mg/mL) was obtained when the EFB was pretreated by [MOBzt]CH3COO with enzymatic hydrolysis for 24 hours. This research is expected to contribute to the development of new biomass pretreatment methods.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"104 2 Pt 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89560055","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: 8

Modification of Kaolin with Carbon Quantum Dots as Composite for Methylene Blue Removal: Literature Review and Experiment 碳量子点改性高岭土去除亚甲基蓝:文献综述与实验研究

Indonesian Journal of Science and Technology Pub Date : 2022-05-09 DOI: 10.17509/ijost.v7i2.50810

N. S. Sambudi, Yuvan Sithambaran, Khee Chung Hui, M. W. Nugraha, N. Kamal, N. Y. Harun, S. Sufian

引用次数: 1

In-Vitro Anticancer Activity of Chemical Constituents from Etlingera alba Poulsen against Triple Negative Breast Cancer and in silico Approaches towards Matrix metalloproteinase-1 Inhibition 白刺化学成分对三阴性乳腺癌的体外抗癌活性及基质金属蛋白酶-1抑制作用的研究

Indonesian Journal of Science and Technology Pub Date : 2022-05-09 DOI: 10.17509/ijost.v7i2.50547

W. Wahyuni, Ajeng Diantini, M. Ghozali, A. Subarnas, E. Julaeha, Riezki Amalia, A. Fristiohady, A. Sundowo, S. Fajriah, Y. E. Hadisaputri, R. M. Febrianti, Fauzia Azzahra, A. W. Yodha, I. Sahidin

引用次数: 1

Sensitivity of Junction Width to Tidal Nonlinearity on Small and Shallow Tidal Junction 小浅潮汐结的结宽对潮汐非线性的敏感性

Indonesian Journal of Science and Technology Pub Date : 2022-05-09 DOI: 10.17509/ijost.v7i2.49856

F. Khadami, K. Kawanisi, Mohamad Basel Al Sawaf, Gillang Noor Nugrahaning Gusti

{"title":"Sensitivity of Junction Width to Tidal Nonlinearity on Small and Shallow Tidal Junction","authors":"F. Khadami, K. Kawanisi, Mohamad Basel Al Sawaf, Gillang Noor Nugrahaning Gusti","doi":"10.17509/ijost.v7i2.49856","DOIUrl":"https://doi.org/10.17509/ijost.v7i2.49856","url":null,"abstract":"Observations of water elevation in the short and small tidal junctions of the Ota River, Japan, showed an increase in tidal nonlinearity at the apex of the junction. To quantitatively estimate the increase in nonlinearity, the barotropic hydrodynamic model was applied in an idealized junction domain, inspired by the Ota River Estuary junction. Even though the model was simplified, it successfully reproduced the increase in nonlinearity at the junction apex. A sensitivity analysis of tidal nonlinearity to the width of the upstream channel at the junction was performed by varying the upstream channel width from the same width as the branch channel width to three times the branch channel width. The relationship between the upstream channel width at the apex and tidal nonlinearity was not linear. Tidal nonlinearity was maximized when the apex width was twice the branch channel width. The convergence of the tides in the small width junction induced an increase of some positions of quarter-diurnal tidal constituent that raised the tidal nonlinearity. In the case of a wider channel, the flushing from river runoff dampen the tidal constituents, making it decrease tidal nonlinearity","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"265 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81056188","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

Anti-Cancer Effect of Phosphatidylcholine Containing Conjugated Linoleic Acid at sn-2 Position on MCF-7 Breast Cancer Cell Line sn-2位共轭亚油酸磷脂酰胆碱对MCF-7乳腺癌细胞株的抗癌作用

Indonesian Journal of Science and Technology Pub Date : 2022-05-09 DOI: 10.17509/ijost.v7i2.50663

R. Fauziah, Chin Rie, T. Yoshino, S. Ogita, Yukihiro Yamamoto

引用次数: 1

Amorphous Iron Phosphate: Inorganic Sol-Gel Synthesis-Sodium and Potassium Insertion 无定形磷酸铁:无机溶胶-凝胶合成-钠和钾的插入

Indonesian Journal of Science and Technology Pub Date : 2022-05-09 DOI: 10.17509/ijost.v7i2.45948

F. Maarouf, S. Saoiabi, K. Azzaoui, Hind Khalil, M. Khalil, A. Yahyaoui, A. Saoiabi, B. Hammouti, M. Youssoufi, S. Shityakov, O. Hamed, S. Jodeh, Rachid Sabbahi

{"title":"Amorphous Iron Phosphate: Inorganic Sol-Gel Synthesis-Sodium and Potassium Insertion","authors":"F. Maarouf, S. Saoiabi, K. Azzaoui, Hind Khalil, M. Khalil, A. Yahyaoui, A. Saoiabi, B. Hammouti, M. Youssoufi, S. Shityakov, O. Hamed, S. Jodeh, Rachid Sabbahi","doi":"10.17509/ijost.v7i2.45948","DOIUrl":"https://doi.org/10.17509/ijost.v7i2.45948","url":null,"abstract":"Amorphous iron phosphate, FePO4.2H2O, was synthesized at ambient temperature using an inorganic sol-gel method coupled with a microwave route. The experimental conditions for the gelling of the Fe (III)-H3PO4 system are defined. Potentiometric Time Titration (PTT) and Potentiometric Mass Titration (PMT) methods were used to investigate the acid-base surface chemistry of obtained phosphate. Variations of surface charge with the contact time, Q = f(t), are examined for time contact ranged from 0 to 72 hours. The concentrations suspensions used for this purpose were 0.75, 1.25, and 2.5 g/L. The point of zero charges (PZC) and isoelectric point (IEP) were defined using the derivative method examining the variations , at lower contact time. A value of 5.4 was obtained for both PZC and IEP. Q in the function of the t method is performed for synthesized FePO4. 2H2O in NaCl and KCl electrolytes. The optimal surface charge of 40 C corresponding to insertion of 4.2x10-4 M of Na+ or K+, is achieved in explored conditions. The results suggest that the synthesized iron phosphate is amorphous.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74424034","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

Conversion of Green Silica from Corn Leaf into Zeolites Na A-X 玉米叶中绿二氧化硅转化为沸石Na A-X的研究

Indonesian Journal of Science and Technology Pub Date : 2022-05-09 DOI: 10.17509/ijost.v7i2.45831

Teguh Kurniawan, D. Satria, Juniafit Bima Saputra, M. Bilad, N. Nordin, H. Abdullah

{"title":"Conversion of Green Silica from Corn Leaf into Zeolites Na A-X","authors":"Teguh Kurniawan, D. Satria, Juniafit Bima Saputra, M. Bilad, N. Nordin, H. Abdullah","doi":"10.17509/ijost.v7i2.45831","DOIUrl":"https://doi.org/10.17509/ijost.v7i2.45831","url":null,"abstract":"Combustion of corn leaf as a model of biomass from agricultural waste is a simple way to obtain the energy. It produces a low-value by-product of ash and is rich in silica that can become a precursor for zeolite production. In this study, acid-treated corn leaves combustion was performed to produce high purity silica (SiO2). The diffraction pattern suggested that the extracted silica was amorphous without the impurities phase. Additionally, the nitrogen isotherm indicated that the material was highly mesoporous silica with a total surface area of 200 m2/g. The hydrothermal method was then applied with a composition molar ratio of 1.25SiO2:1Al2O3:5Na2O:250H2O to synthesize zeolites from the silica. The temperature and time effect on the hydrothermal zeolite’s synthesis was investigated. The diffraction pattern shows that high crystalline zeolite Na A-X was produced at temperatures of 100°C and 8 h hydrothermal time. According to nitrogen physisorption analysis, the zeolite Na A-X consisted of micropores with a total surface area of 270 m2/g. The morphology of zeolite Na A-X was cube for the Na-A and octahedral for the Na-X. The hydrothermal temperature and time highly affected the zeolite formed. This research suggested that the ash waste could be valorized through conversion into a high economic value zeolites.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"88 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83829742","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

Effects of Moisture Content and Grain Type on Mechanical Properties of White Rice: Literature review and Experiment 水分含量和籽粒类型对白米力学性能的影响:文献综述和试验

Indonesian Journal of Science and Technology Pub Date : 2022-05-09 DOI: 10.17509/ijost.v7i2.50887

N. Bintoro, A. Zahra

{"title":"Effects of Moisture Content and Grain Type on Mechanical Properties of White Rice: Literature review and Experiment","authors":"N. Bintoro, A. Zahra","doi":"10.17509/ijost.v7i2.50887","DOIUrl":"https://doi.org/10.17509/ijost.v7i2.50887","url":null,"abstract":"The mechanical properties of agricultural grains are required in the design of agricultural processes and machinery. These properties are influenced by moisture content and grain type. This study aimed to determine the effect of moisture content and grain type on the mechanical properties of white rice. There are three different types of white rice, namely short-bold (Koshihikari), long-medium (IR 64), and very long-slender (Basmati) grains within three levels of moisture content of 9%, 14%, and 19% were used as the samples in the experiment. The experiment was designed into Completely Randomized Design, factorial 3 x 3. The dimension, internal friction angle, and rupture force of the grain samples were respectively measured using a digital calliper, direct shear cell apparatus, and compression test apparatus. It could be concluded that moisture content, grain type, and the interaction of these two factors significantly affected almost all parameters of the mechanical properties of white rice. Most of the relationships between the parameters of mechanical properties and moisture content could be expressed as linear equations.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"22 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72477170","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

Urban Heat Island Assessment using Remote Sensing Data in West Java, Indonesia: From Literature Review to Experiments and Analyses 基于遥感数据的印尼西爪哇城市热岛评估:从文献综述到实验与分析

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.44146

N. Nandi, M. Dede

{"title":"Urban Heat Island Assessment using Remote Sensing Data in West Java, Indonesia: From Literature Review to Experiments and Analyses","authors":"N. Nandi, M. Dede","doi":"10.17509/ijost.v7i1.44146","DOIUrl":"https://doi.org/10.17509/ijost.v7i1.44146","url":null,"abstract":"Urban heat island (UHI) is a significantly increasing temperature that occurs in the urban region due to urbanization and anthropogenic activities. The UHI represents environmental quality decrease and able to change a microclimate in the long term. It phenomenon can be estimated using multi-temporal remote sensing imagery data. This study aims to analyze the spatial dynamics of UHI in the urban region of West Java from 1998 to 2018. We only used remote sensing data from different datasets. Information of land-surface temperature is extracted from Landsat-5 TM and Landsat-8 OLI images using radiative transfer equation which validated using MODIS data in the same period. This study showed that UHI intensity in the urban region of West Java reach 5.11oC in 2018. For 20 years, the land-surface temperature increased to 4.44oC. The UHI distribution is concentrated in the central business district, industrial area, harbor, terminal, airport, and traffic jam zone. The UHI significantly increased in Depok and Cimahi, which are known as satellite cities for the surrounding megapolitan (Jakarta and Bandung Raya). This model has high validity result with a correlation value of 0.74. The UHI management is important to strengthen urban resilience in the environmental field through green open space, green belts, roof gardens, land use and land cover formal direction, and the use of high albedo materials to build construction.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"4 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88577511","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

A review of recent advances in metaheuristic maximum power point tracking algorithms for solar photovoltaic systems under the partial-shading conditions 部分遮阳条件下太阳能光伏系统最大功率点跟踪的元启发式算法研究进展综述

Indonesian Journal of Science and Technology Pub Date : 2021-12-16 DOI: 10.17509/ijost.v7i1.45612

T. Sutikno, A. Pamungkas, G. Pau, A. Yudhana, M. Facta

{"title":"A review of recent advances in metaheuristic maximum power point tracking algorithms for solar photovoltaic systems under the partial-shading conditions","authors":"T. Sutikno, A. Pamungkas, G. Pau, A. Yudhana, M. Facta","doi":"10.17509/ijost.v7i1.45612","DOIUrl":"https://doi.org/10.17509/ijost.v7i1.45612","url":null,"abstract":"Several maximum power point (MPP) tracking algorithms for solar power or photovoltaic (PV) systems concerning partial-shading conditions have been studied and reviewed using conventional or advanced methods. The standard MPPT algorithms for partial-shading conditions are: (i) conventional; (ii) mathematics-based; (iii) artificial intelligence; (iv) metaheuristic. The main problems of the conventional methods are poor power harvesting and low efficiency due to many local maximum appearances and difficulty in determining the global maximum tracking. This paper presents MPPT algorithms for partial-shading conditions, mainly metaheuristics algorithms. Firstly, the four classification algorithms will be reviewed. Secondly, an in-depth review of the metaheuristic algorithms is presented. Remarkably, 40 metaheuristic algorithms are classified into four classes for a more detailed discussion; physics-based, biology-based, sociology-based, and human behavior-based are presented and evaluated comprehensively. Furthermore, the performance comparison of the 40 metaheuristic algorithms in terms of complexity level, converter type, sensor requirement, steady-state oscillation, tracking capability, cost, and grid connection are synthesized. Generally, readers can choose the most appropriate algorithms according to application necessities and system conditions. This study can be considered a valuable reference for in-depth works on current related issues.","PeriodicalId":37185,"journal":{"name":"Indonesian Journal of Science and Technology","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88282394","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: 2