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Viscosity Modeling of MES and SLS Using Machine Learning Method
Fathaddin, Muhammad Taufiq
; Setiati, Rini
; Akbar, Fahrurrozi
; Sumirat, Iwan
; Bharoto
; Ramadhan, Ranggi Sahmura
; Onnie Ridaliani Prapansya
; Ristawati, Arinda
Viscosity is crucial to improve the efficiency of injected fluids for oil displacement in reservoirs. Traditionally, research has focused on polymers that help reduce the mobility of injected fluids, while surfactant viscosity has received less consideration. This research investigated the viscosity behavior of methyl ester sulfonate (MES) and sodium lauryl sulfate (SLS) surfactant solutions using a machine learning method—adaptive neurofuzzy inference system (ANFIS). This study aimed to predict...
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Altitude-dependent Variation in Antibacterial Properties of Red Ginger (Zingiber officinale var. rubrum): Implications for Natural Anti-Salmonella Agents
Red ginger contains diverse bioactive compounds with strong antioxidant and antibacterial activities. This study investigated the influence of growth location on the anti-Salmonella activity of red ginger extracts from seven regions in Java, Indonesia. The fractions were analyzed for total phenolic and flavonoid contents, as well as antioxidant capacity using DPPH and FRAP assays. Antibacterial activity was assessed against Salmonella using the Kirby-Bauer disk diffusion method. Results showed t...
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Antibacterial activity of miana (Coleus scutellarioides) against Streptococcus pyogenes and Streptococcus mutans
Miana leaves (Coleus scutellarioides) have compounds that have the potential to be antibacterial. The bacteria Streptococcus pyogenes and Streptococcus mutans are a group of positive bacteria containing a lipid layer that is low in peptidoglycan and teichoic acid. This study aims to determine the antibacterial activity of Miana leaves against Streptococcus pyogenes and Streptococcus mutans because both types of infectious bacteria. This research used the disc diffusion method. The preparation in...
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In vitro antifungal activity of Mimosa pudica rhizosphere bacteria against Fusarium spp.
This study aims to explore rhizosphere bacteria from Mimosa pudica L. as a source of antagonistic bacteria against Fusarium spp. Rhizosphere soil samples were collected, isolated, morphologically characterized, and tested for antifungal activity in vitro against Fusarium spp. The percentage of inhibition (PI) was calculated after 7 days. Six bacterial isolates were obtained and tentatively identified as Bacillus, Cellulomonas, Arthrobacter, and Micrococcus species. All isolates exhibited antagon...
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Integrating BSF larvae for the sustainable bioconversion of banana peels and sprout hulls waste
Rizkawati, Vina
; Andhini, Shabrina Lathiifah
; Noer, Mohamad Isnin
; Yudistira, Dwi Harya
; Kurniati, Tri Handayani
; Lisanti, Elsa
; Komala, Ratna
; Herlin, Weri
The management of organic waste presents a significant challenge in Indonesia, especially fruit and vegetable by-products. Black Soldier Fly (BSF, Hermetia illucens) larvae offer an effective solution due to their high potential for organic waste conversion. This study investigated the efficacy of BSF larvae in reducing and bioconverting organic waste composed of banana peels and sprout hulls, and examined the influence of EM4 fermentation on larval growth performance. Waste Reduction Index (WRI...
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Waterbirds as bioindicators of ecosystem health: seasonal dynamics in Tondano Lake, Indonesia
Waterbird diversity in Tondano Lake reflects ecological degradation caused by water-hyacinth invasion and sedimentation. This study analyzed the diversity and abundance of waterbirds in Tondano Lake, Indonesia, across wet (February-May) and dry (June-October) seasons in 2025 to assess their role as bioindicators of ecosystem health. Multi-season observations were carried out monthly along a 6.5 km transect at ten strategic points. Eight waterbird species from three families were recorded, with E...
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Pengaruh Green Accounting, Profitabilitas, Leverage, dan Ukuran Perusahaan terhadap Agresivitas Pajak
DHARMA EKONOMI
(2026)
This study aims to determine the effect of green accounting, profitability, leverage, and company size on tax aggressiveness. The population in this study is energy sector companies listed on the Indonesia Stock Exchange for the financial reporting period 2020-2024. The sampling technique used in this study is purposive sampling, and a sample of 35 companies was obtained. The analysis technique used is multiple linear regression analysis using SPSS version 22.0. The results of this study indicat...
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GOOD CORPORATE GOVERNANCE, FINANCIAL PERFORMANCE, AND FIRM VALUE: EVIDENCE IN INDONESIA
Jurnal Akuntansi, Keuangan dan Auditing
Vol 6
, No 2
(2026)
This study aims to see the influence of good corporate governance and financial performance on the value of companies in Indonesia. Good Corporate governance uses variable institutional ownership and subsequent managerial ownership for financial performance using profitability. This study uses a population, namely all property and real estate sector companies listed on the Indonesia Stock Exchange, with a research period of 3 years, namely 2019 – 2021. The sample selection method used is the pur...
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Utilization of cassava peel waste (Manihot esculenta) as substrate in the production of cellulase enzymes by Aspergillus niger
Cellulase enzymes is an enzyme that can hydrolyze cellulose into smaller sugar components. Cellulase enzymes are produced due to high demand, with 29.17% in the animal feed industry, 14.67% in the textile industry, and 26.17% in the paper industry. One method of producing cellulase enzymes is by utilizing the cellulolytic microorganism Aspergillus niger. This study aims to optimize cellulase enzyme production by Aspergillus niger through liquid fermentation on cassava peel substrate (Manihot esc...
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Isolation and screening of halotolerant protease-producing bacteria from Lampung fermented shrimp paste
Protease are class of degradative enzymes that hydrolyze proteins, breaking its peptide bond, into smaller peptides and amino acids. Microbial proteases have gained increasing attention due to its productivity and utilization in various industries. Proteolytic bacteria derived from fermented shrimp paste from Lampung have great potential to meet this need. However, studies on these bacteria are still limited, so further research is needed to explore and optimally utilize their potential. This st...
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