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All Journal Marine Fisheries: Jurnal Teknologi dan Manajemen Perikanan Laut Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Sains Materi Indonesia agriTECH Science and Technology Indonesia Industria: Jurnal Teknologi dan Manajemen Agroindustri Syntax Literate: Jurnal Ilmiah Indonesia Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology Indonesian Journal of Chemistry Jurnal Kebijakan Perikanan Indonesia International Journal of Supply Chain Management Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan Management Studies and Entrepreneurship Journal (MSEJ) Journal of Innovation Research and Knowledge Jurnal Perikanan
Hari Eko Irianto
Balai Besar Penelitian Dan Pengembangan Pengolahan Produk Dan Bioteknologi Kelautan Dan Perikanan, Jl. KS. Tubun, Petamburan VI, Slipi, Jakarta
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Transportation Other

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The Influence of Factors Related to Safety Culture Maturity on Offshore Drilling Operations in Saudi Arabia Lumanauw, Jimmy; Erislan, Erislan; Irianto, Hari Eko; Sugiarto, Sugiarto
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i11.62418

Abstract

Offshore drilling operations are a high-risk activity that requires a work safety system that is not only compliance-based, but also supported by a mature safety culture. Safety culture maturity is an important indicator in assessing the extent to which safety values have been embedded and applied thoroughly in the work environment. This study aims to analyze the influence of five groups of factors on the level of maturity of safety culture, namely: organizational and managerial factors, individual and culture, communication and participation, technical and operational, and external factors. The research was conducted on three jack-up rigs owned by COSL Drilling Saudi Limited in Saudi Arabia, involving 300 respondents from various levels of work. The quantitative approach was used with stratified random sampling techniques and data analysis was carried out using the Structural Equation Modeling–Partial Least Squares (SEM-PLS) method. The results showed that all independent factors had a significant influence on safety culture maturity, with individual and cultural factors as the most dominant factors. This research contributes to identifying priority areas for strengthening safety culture to build a proactive, adaptive, and sustainable work safety system in the offshore drilling industry.
Characterization of Cellulose Fibers Extracted from Ulva lactuca with Various NaOH Concentrations Irianto, Hari Eko; Rachmana, Alfitra Raya; Nurhayati, Nurhayati; Fransiska, Dina; Amanda, Putri; Haryati, Sakinah; Aditia, Rifki Prayoga; Suah, Faiz Bukhari Mohd
Squalen, Buletin Pascapanen dan Bioteknologi Kelautan dan Perikanan Vol 20, No 3 (2025): December 2025
Publisher : :Agency for Marine and Fisheries Research and Human Resources, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/squalen.1055

Abstract

As demand for sustainable biopolymers is growing, Ulva lactuca has emerged as a promising macroalgal source of cellulose. Alkaline hydrolysis using sodium hydroxide (NaOH) is widely applied in cellulose extraction to remove lignin; however, the influence of NaOH concentration during delignification process of U. lactuca remains insufficiently understood. This study aimed to identify the optimal NaOH concentration for cellulose extraction from U. lactuca and to characterize the resulting fibers. Alkaline treatments were performed using NaOH concentrations of 10%, 20%, 30%, and 40%. The extracted cellulose was evaluated for yield, functional groups, thermal stability, crystallinity index (CrI), and morphology using FTIR, XRD, simultaneous thermal analysis, and FE-SEM. Results showed that cellulose yields ranged from 4.38% to 5.44%, with no significant differences among treatments. In contrast, NaOH concentration significantly affected cellulose morphology, with enhanced delignification and fibrillar refinement observed at higher alkali levels. FTIR spectra confirmed cellulose purity through characteristic O–H and C–H stretching vibrations, β-glycosidic linkages, and the absence of hemicellulose-related peaks. XRD analysis showed that 30% NaOH treatment produced the highest CrI (84.09%), while higher concentrations induced structural degradation. Thermal analysis revealed a two-stage degradation process, consisting of moisture loss at 120–150 °C followed by major cellulose decomposition at 250–300 °C. Overall, 30% NaOH was identified as the optimal concentration for extracting α-cellulose from U. lactuca.
KARAKTERISTIK EDIBLE FILM KOMPOSIT ALGINAT–MONTMORILLONIT Setyawati, Amelya; Giyatmi, Giyatmi; Hari Eko Irianto; Dina Fransiska
Journal of Innovation Research and Knowledge Vol. 5 No. 9 (2026): Februari 2026
Publisher : Bajang Institute

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Abstract

Alginate is the product of processing seaweed Sargassum sp.  Alginate can be used as basic material in making edible film.  The aim of the research is to find the effect of alginate an montmorillonite concentration to the characteristics of edible film (the moisture content, solubility, thickness, tensile strength, elongation, water vapor transmission rate, opacity measurement, and color).  This study used a completely randomized design (CRD) pattern factorials by a Factor of A is the level alginate (1,00%; 1,25%; and 1,50%) and Factors B is the level montmorillonite (0,50%; 1,00%; and 1,50%) with 3 repetitions. The measured parameters were the moisture content, solubility, thickness, tensile strength, elongation, water vapor transmission rate, opacity measurement, and color. Based on the study on the characteristics of alginate-montmorillonite composite edible film it can be concluded that the best product based on chemical and mechanical test results is edible film made with 1.50% alginate concentration with 1.00% montmorillonite concentration resulting in a moisture content of 18.76%, solubility of 100%, thickness of 0.0368 mm, tensile strength of 32.27 MPa, percent of elongation of 47.66%, water vapor transmission rate of 12,04 g/m2/hours, opacity measurement of 3.23 YC / 2, L color test of 91.25, color test a equals -1.05, and color test b is 4.47.  The montmorillonite concentration had no effect (P≥0.05) on the solubility value, and color test a is (greeness), but it had a very significant effect (P ≤0.01) on the value of thickness, percent elongation, water vapor transmission rate, and opacity value
Co-Authors Achmad Poernomo Agus Supriyanto Agusman Agusman Agusman, Agusman Akbar Hanif Dawam Abdullah Ali Suman Alifah, Reza Nur Amanda, Putri Anja Meryandini Ausias, Gilles Azizah Intan Pangesty Batubara, Siti Chairiyah Chalid, Muchamad Dedi Fardiaz Dedi Supriadi Dewi Seswita Zilda Diah Lestari Ayudiarti Dian Dwi Putri Diana Natalia Dina Fransiska Dina Fransiska Djagal Wiseso Marseno Djagal Wiseso Marseno Dwiyitno Dwiyitno El-Ghifary, Muhammad Ghufron Ema Hastarini Eni Harmayani Erislan, Erislan farida ariyani Fayakun Satria Fransiska, Dina Gintung Patantis Gintung Patantis Giyatmi Giyatmi Hanifah Nuryani Lioe Hastiana, Sabina Ifah Munifah Ifah Munifah Ijah Muljanah Ikasari, Diah Indrati, Retno JAKA WIDADA Jamal Basmal, Jamal Jan Schwarzbauer Khairul Amri Kusumaningrum, Wida Banar Laksono Trisnantoro Larissa Dsikowitzky Lumanauw, Jimmy M. Syamsul Maarif Marimin , Mochamad Chalid Muljanah, Ijah Nurhayati Nurhayati Nurhayati Nurhayati Nurhayati Nuri Andarwulan Nurul Hak Panji Priambudi Poetri, Tika Annisa Eka Putri Putih Puspa Asri Rachmana, Alfitra Raya Rifki Prayoga Aditia Rini Riastuti, Rini Rinta Kusumawati, Rinta Rizal Syarief Rodiah Nurbaya Sari Rossy Choerun Nissa Roziafanto, Ahmad Nandang Sakinah Haryati Salampessy, Randi Bokhy Syuliana Setyawati, Amelya Sidartha, B. Boy Rahardjo Siti Zahro Nurbani Slamet Budhijanto Sri Marliah Suah, Faiz Bukhari Mohd Subaryono Subaryono, Subaryono Sugiarto S Sukarno Sukarno Suryaningrum, Theresia Dwi Suryanti Suryanti Suryanti Suryanti Suryanti Suryanti Suryanti Syamsiar, Syamsiar Tazwir Tazwir Titi Candra Sunarti Tri Wulandari Widya Asmara Yusro Nuri Fawzya Yusro Nuri Fawzya Zilda, Dewi Zeswita