Science and Technology Indonesia最新文献_第7页

Studying the Structure Properties of Copper Nanoparticles Prepared by Chemical Reduction Method 化学还原法制备铜纳米颗粒的结构性质研究

Science and Technology Indonesia Pub Date : 2023-10-01 DOI: 10.26554/sti.2023.8.4.640-646

Noora H. Al-Zobiadi, Ammar A. Habeeb, Awatif S. Jasim

引用次数: 0

Solving the Shortest Total Path Length Spanning Tree Problem Using the Modified Sollin and Modified Dijkstra Algorithms 用改进的Sollin和改进的Dijkstra算法求解最短总路径长度生成树问题

Science and Technology Indonesia Pub Date : 2023-10-01 DOI: 10.26554/sti.2023.8.4.684-690

Wamiliana Wamiliana, Reni Permata Sari, Astri Reformasari, Jani Suparman, Akmal Junaidi

引用次数: 0

Monitoring the Muara Laboh Geothermal Field in Indonesia using the ISBAS Method with Sentinel-1 SAR Images 基于ISBAS方法和Sentinel-1 SAR图像监测印度尼西亚Muara Laboh地热田

Science and Technology Indonesia Pub Date : 2023-10-01 DOI: 10.26554/sti.2023.8.4.626-631

Mokhamad Yusup Nur Khakim, Takeshi Tsuji, Erni Erni, Akhmad Aminudin Bama, Frinsyah Virgo, Muhammad Irfan, Azhar Kholiq Affandi, Toshifumi Matsuoka

{"title":"Monitoring the Muara Laboh Geothermal Field in Indonesia using the ISBAS Method with Sentinel-1 SAR Images","authors":"Mokhamad Yusup Nur Khakim, Takeshi Tsuji, Erni Erni, Akhmad Aminudin Bama, Frinsyah Virgo, Muhammad Irfan, Azhar Kholiq Affandi, Toshifumi Matsuoka","doi":"10.26554/sti.2023.8.4.626-631","DOIUrl":"https://doi.org/10.26554/sti.2023.8.4.626-631","url":null,"abstract":"The Muara Laboh geothermal field lies in a South Solok basin zone, West Sumatra, Indonesia. Production and reinjection of geothermal fluids into the underground reservoir commonly induce crustal deformation. The study area is covered by 63.8% plantation, primary, and secondary forests, which limit the ability of conventional InSAR techniques. Therefore, an Intermittent Small BASeline Subset (ISBAS) analysis has been performed to estimate line-of sight (LOS) displacement time series due to geothermal production using the Sentinel-1 dataset between 8 March 2021 and 15 March 2022. The localized subsidence with ∼30 mm/yr rate over this tropical geothermal field has been revealed by using the ISBAS. The subsidence coincides with an area of the Muara Laboh geothermal reservoir. We suggest that geothermal production induced subsidence. In addition, the deformation in this geothermal field was controlled by faults and seasonally influenced by rainfall. Therefore, deformation variation was correlated with fluctuations in rainfall patterns. The geothermal reservoir system exhibited elastic expansion in response to seasonal recharge events during the rainy season.","PeriodicalId":21644,"journal":{"name":"Science and Technology Indonesia","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135406741","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

Towards Sustainable City: A Covering Model for Recycling Facility Location-allocation in Nilai, Malaysia 迈向可持续城市:马来西亚尼莱市回收设施选址的覆盖模式

Science and Technology Indonesia Pub Date : 2023-10-01 DOI: 10.26554/sti.2023.8.4.570-578

Zati Aqmar Zaharudin, Adibah Shuib, Rieske Hadianti, Zahari Md Rodzi

{"title":"Towards Sustainable City: A Covering Model for Recycling Facility Location-allocation in Nilai, Malaysia","authors":"Zati Aqmar Zaharudin, Adibah Shuib, Rieske Hadianti, Zahari Md Rodzi","doi":"10.26554/sti.2023.8.4.570-578","DOIUrl":"https://doi.org/10.26554/sti.2023.8.4.570-578","url":null,"abstract":"Sustainable waste management is essential for any nation. To limit the amount of waste transported to landfills, it is critical to handle waste properly, notably by segregating recyclables from discarded waste. Waste separation at the source is critical to ensure that generated waste is not completely directed to landfill. The practice of waste separation would initiate the recycling process, which is able to reduce the amount of waste sent to the landfill. Recycling is critical to the achievement of two Sustainable Development Goals (SDGs), 11 and 12, for which Malaysian government has set the goal for recycling rates to reach 40% by 2025 in 2022, the rate has reached 33.17%. In Malaysia, recyclables are either collected on-site or sent to a designated facility. The separation at source activity is essential for developing recycling practices. Despite being the largest waste generator, public engagement, particularly at the household level, has remained low, most likely due to recycling facility availability and accessibility issues. Thus, improving public access to the facility would lead to increased recycling rates. In this study, a mixed integer linear programming model is proposed to locate recycling facilities in optimal locations that cover the most amount of waste generated by households. The capacity level is induced to ensure that the dropped-off recyclables are proportionate at the designated facility locations. Several experiments were conducted for validity purposes, and the proposed model was applied in a Malaysian urban area, namely Nilai. As a result, the proposed model was able to locate the optimal locations with the requisite capacity level while ensuring coverage for most Nilai households.","PeriodicalId":21644,"journal":{"name":"Science and Technology Indonesia","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135408340","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

Formation of Hydroxyl-Amide Solid Dispersion Involving Azithromycin and Chitosan-Alginate Biopolymer to Increase the Dissolution Rate of Azithromycin 阿奇霉素与壳聚糖-海藻酸盐生物聚合物形成羟基酰胺固体分散体以提高阿奇霉素的溶出率

Science and Technology Indonesia Pub Date : 2023-10-01 DOI: 10.26554/sti.2023.8.4.647-653

Mardiyanto Mardiyanto, Budi Untari, Ady Mara, Diko Fahri Ferdiansyah

引用次数: 0

Gastroprotective Effects of Dendropthoe pentandra Leaf Ethanol Extract on Peptic Ulcer Animal Models 五冬藤叶乙醇提取物对消化性溃疡动物模型的胃保护作用

Science and Technology Indonesia Pub Date : 2023-07-06 DOI: 10.26554/sti.2023.8.3.382-387

F. Fitrya, Annisa Amriani, Rennie Puspa Novita, Fadila Kurnia

引用次数: 0

Isolation and Molecular Identification of Direct Red 80 Synthetic Dye Degradation Bacteria from Palembang Indonesia Jumputan Cloth Industrial Waste 印尼巨港Jumputan布工业废料中直接降解红80合成染料细菌的分离与分子鉴定

Science and Technology Indonesia Pub Date : 2023-07-06 DOI: 10.26554/sti.2023.8.3.429-435

M. Muharni, E. Nurnawati, H. Yohandini, H. Widjajanti

{"title":"Isolation and Molecular Identification of Direct Red 80 Synthetic Dye Degradation Bacteria from Palembang Indonesia Jumputan Cloth Industrial Waste","authors":"M. Muharni, E. Nurnawati, H. Yohandini, H. Widjajanti","doi":"10.26554/sti.2023.8.3.429-435","DOIUrl":"https://doi.org/10.26554/sti.2023.8.3.429-435","url":null,"abstract":"Industrial waste from Jumputan cloth production pose a significant risk to environmental safety due to their toxic synthetic dye content. Several studies have shown that the presence of bacteria in these materials plays a very important role in decolorization process of the constituent dye. Therefore, this study aims to isolate bacteria with the ability to decolorize direct red 80 from Jumputan cloth industrial waste. Characterization of isolates was carried out macroscopically, microscopically, and biochemically, followed by molecular identification using the 16S rRNA gene. Decolorization effects of the samples on red dye 80 were then assessed using a spectrophotometer at a maximum wavelength of 528 nm. The results showed that 6 bacteria isolates can degrade dye, with decolorizing power ranging from 26.33±0.94 - 73.67±0.47. The highest potential for decolorizing waste synthetic dye is seen in isolate BD 05. Phylogenetic analysis showed that there were 3 genera of bacteria among the samples obtained, namely Bacillus, Aeromonas, and Pseudomonas. These bacteria were closely related to Bacillus tropicus, Areomonas jandaei, and Pseudomonas stutzeri. Pseudomonas stutzeri (BD 05) has the highest potential in handling jumputan industrial waste.","PeriodicalId":21644,"journal":{"name":"Science and Technology Indonesia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47391301","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 Validation of Fast and Simple Fourier Transform Infrared Spectrophotometric Method for Analysis of Thiamphenicol in Capsule Dosage Form 快速简便傅里叶变换红外分光光度法分析胶囊剂型中硫胺霉素的建立与验证

Science and Technology Indonesia Pub Date : 2023-07-06 DOI: 10.26554/sti.2023.8.3.344-352

N. Nerdy, Linda Margata, N. Zebua, P. Lestari, T. K. Bakri, Faisal Yusuf, Vonna Aulianshah

{"title":"Development and Validation of Fast and Simple Fourier Transform Infrared Spectrophotometric Method for Analysis of Thiamphenicol in Capsule Dosage Form","authors":"N. Nerdy, Linda Margata, N. Zebua, P. Lestari, T. K. Bakri, Faisal Yusuf, Vonna Aulianshah","doi":"10.26554/sti.2023.8.3.344-352","DOIUrl":"https://doi.org/10.26554/sti.2023.8.3.344-352","url":null,"abstract":"The development of a method for identification and determination of thiamphenicol by Fourier Transform Infrared will provide convenience to developers because it is fast and easy for analysis. The research was carried out by utilizing the solubility of thiamphenicol in methanol with three stages, namely method development, sample analysis, and method validation. The method development stage showed that the specific peak of thiamphenicol was at a peak with a wavenumber of 1694.1 cm−1; this specific peak of thiamphenicol was used for qualitative analysis and quantitative analysis of thiamphenicol in the capsule dosage form. The sample analysis showed that all analyzed thiamphenicol in capsule dosage form showed good results both qualitatively and quantitatively. Qualitatively all the samples analyzed showed a specific peak at specific positions and specific wavenumbers. These results meet the requirements for containing thiamphenicol in the dosage form. Quantitatively all the samples analyzed ranged from 97.97% to 102.24% by peak height and peak area. These results meet the requirements for active substance levels in general preparations within 90.0% to 110.0%. The method validation for peak height and peak area showed that the accuracy parameter had a recovery percentage of 100.28% and 100.41% (between 98.0% to 102.0%), the precision parameter with a relative standard deviation of 0.31% and 0.37% (not more than 2.0%), and the linearity parameter with a correlation coefficient of 0.9999 and 0.9997 (not less than 0.99). The limit of detection value was 0.2971 mg/mL and 0.5338 mg/mL, the limit of quantitation value was 0.9004 mg/mL and 1.6176 mg/mL, the range for both was 80% to 120%, and the specificity for both met the requirement. The Fourier Transform Infrared method has been successfully developed, applied, and validated for qualitative analysis and quantitative analysis of thiamphenicol in capsule dosage form.","PeriodicalId":21644,"journal":{"name":"Science and Technology Indonesia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44942456","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

Uncovering Obstacles to Household Waste Recycling in Seremban, Malaysia through Decision-Making Trial and Evaluation Laboratory (DEMATEL) Analysis 通过决策试验和评估实验室（DEMATEL）分析揭示马来西亚塞伦班生活垃圾回收的障碍

Science and Technology Indonesia Pub Date : 2023-07-06 DOI: 10.26554/sti.2023.8.3.422-428

Z. Rodzi, Ashiera Nadiha Hazri, Nurul Ain Syahirah Mohd Azri, Nurul Dania Farisha Sharul Rhmdan, Zati Aqmar Zaharudin, S. Uttunggadewa

{"title":"Uncovering Obstacles to Household Waste Recycling in Seremban, Malaysia through Decision-Making Trial and Evaluation Laboratory (DEMATEL) Analysis","authors":"Z. Rodzi, Ashiera Nadiha Hazri, Nurul Ain Syahirah Mohd Azri, Nurul Dania Farisha Sharul Rhmdan, Zati Aqmar Zaharudin, S. Uttunggadewa","doi":"10.26554/sti.2023.8.3.422-428","DOIUrl":"https://doi.org/10.26554/sti.2023.8.3.422-428","url":null,"abstract":"This study investigates the barriers to household waste recycling in Seremban, Malaysia, using the Decision-Making Trial and Evaluation Laboratory (DEMATEL) analysis. The research questions aimed to identify and rank the most significant barriers to recycling and understand the causal relationships between them. The study found that limited access to recycling facilities and services and lack of motivation or incentive to recycle were the most significant causes of household waste recycling barriers in Seremban. Onthe other hand, lack of motivation or incentive to recycle and negative attitudes towards recycling, were identified as the most significant effects. The study’s findings have theoretical implications for waste management and sustainable development and offer practical implications for policymakers and waste management practitioners in developing effective waste management strategies and policies that can address these barriers. Furthermore, the study’s insights into the most significant barriers to household waste recycling can inform the design of recycling campaigns and educational programs to increase awareness and promote household waste recycling in Seremban. Overall, this study provides a valuable contribution to the field of waste management and sustainable development and offers insights into the challenges of promoting household waste recycling in urban areas.","PeriodicalId":21644,"journal":{"name":"Science and Technology Indonesia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44888510","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: 3

Coprecipitation Synthesis and Antimicrobial Effect Study of Europium Doped Spinel Manganese Ferrites Nanoparticles (MnEu0.1Fe1.9O4NPs) 掺铕尖晶石锰铁氧体纳米粒子(MnEu0.1Fe1.9O4NPs)共沉淀法合成及抗菌效果研究

Science and Technology Indonesia Pub Date : 2023-07-06 DOI: 10.26554/sti.2023.8.3.494-500

Amina Chidouh, Tarek Tahraoui, B. Barhouchi

{"title":"Coprecipitation Synthesis and Antimicrobial Effect Study of Europium Doped Spinel Manganese Ferrites Nanoparticles (MnEu0.1Fe1.9O4NPs)","authors":"Amina Chidouh, Tarek Tahraoui, B. Barhouchi","doi":"10.26554/sti.2023.8.3.494-500","DOIUrl":"https://doi.org/10.26554/sti.2023.8.3.494-500","url":null,"abstract":"Due to the high prevalence of micro-organisms resistant to conventional antimicrobials, the search for new antimicrobial drugs is underway, with nanoparticles being one of the options. This study reports for the first time the use of the coprecipitation method to synthesize europium (Eu) doped spinel manganese ferrites nanoparticles (MnEu0.1Fe1.9O4NPs). The purpose of this research is to determine the antimicrobial activity of MnEu0.1Fe1.9O4NPs. MnEu0.1Fe1.9O4NPs were analyzed using Fourier Transform Infrared Spectroscopy (FTIR), X Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM) combined with Energy Dispersive X-Ray Analysis (EDX) to determine their structure, size, morphology and elemental compositions. The antimicrobial activity of synthesized nanoparticles was evaluated qualitatively using a diffusion disc on agar, followed by minimum inhibitory concentrations (MIC) determination. The findings show that all tested strains were adversely affected by the examined NPs, where E. coli exhibited the highest sensitivity to NPs, followed by S. aureus. The NPs displayed a moderate level of anti-candida action. MnEu0.1Fe1.9O4NPs could be exploited in biomedical usages.","PeriodicalId":21644,"journal":{"name":"Science and Technology Indonesia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42572093","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