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Open Science and Technology
Published by Research and Social Study Institute
ISSN : 2776169X     EISSN : 27761681     DOI : http://dx.doi.org/10.33292/ost
Core Subject : Agriculture, Social, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Environmental Science Mechanical Engineering
Open Science and Technology diterbitkan oleh Research and Social Study Institute sebagai sarana untuk mempublikasikan hasil penelitian, artikel review dari peneliti-peneliti dibidang Ilmu alam, Ilmu pertanian, ilmu Kehutanan, Ilmu Keteknikan, Teknologi, dan Aplikasinya. Jurnal ini terbit dua kali setahun (April dan Oktober). Jurnal ini diterbitkan secara online dan cetak. Open Science and Teknologi memilki filosofi bahwa jurnal ini terbuka untuk siapa saja baik mahasiswa, dosen, peneneliti, konsultan, praktisi di bidang ilmu sains dan teknologi secara umum untuk menerbitkan hasil studi atau penenlitiannya di jurnal ini. Jurnal ini diharapkan pula dapat menjadi jurnal yang fast respone, fast review dan fast publication. Dan kedepan dapat terakreditasi secara nasional dan terindek secara global. Open Science and Technology telah ber P-ISSN 2776-169X dan E-ISSN 2776-1681
Arjuna Subject : Umum - Umum
Articles 69 Documents
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The Effect of PGPR (Plant Growth Promoting Rhizobacteria) and Amino Acids on The Productivity of Eggplant Crop Ardani, Moh
Open Science and Technology Vol. 4 No. 2 (2024): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v4i2.136

Abstract

Buah terung mengandung zat gizi yang cukup penting, seperti vitamin A, B, C, kalium, fosfor, protein, lemak, karbohidrat dan zat besi, sehingga tanaman terung sangat potensial dikembangkan secara intensif sebagai penyumbang yang cukup besar terhadap keanekaragaman bahan pangan bergizi bagi penduduk. Penelitian bertujuan mengetahui pengaruh interaksi antara perlakuan konsentrasi PGPR dan asam amino serta pengaruh masing-masing perlakuan konsentrasi PGPR dan asam amino terhadap produktivitas tanaman terung. Metode penelitian menggunakan Rancangan Acak Kelompok (RAK) faktorial, dengan dua faktor perlakuan dan 3 (tiga) kali ulangan. Faktor pertama konsentrasi PGPR (P), P1: 5 ml/liter, P2: 10 ml/liter, P3: 15 ml/liter. Faktor kedua konsentrasi Asam Amino (A), A1: 2 ml/liter, A2: 4 ml/liter, dan A3: 6 ml/liter. Perlakuan tersebut dikombinasikan dan diperoleh 9 kombinasi perlakuan. Analisis data menggunakan Analysist of Varians (Anova) dengan taraf signifikan 5%. Perlakuan yang berpengaruh nyata diuji lanjut dengan Duncan’s New Multiple Range Test ? 5% (DNMRT). Variabel yang diamati tinggi tanaman, diameter batang, jumlah buah, diameter buah dan bobot buah. Hasil penelitian diperoleh tidak terjadi interaksi antara perlakuan konsentrasi PGPR dan asam amino terhadap produktivitas tanaman terung. Perlakuan tunggal pemberian PGPR dan asam amino diperoleh pemberian PGPR 15 ml/liter dan asam amino 4 ml/liter merupakan perlakuan yang berpengaruh paling baik terhadap produktivitas tanaman terung. Eggplant contains quite important nutrients, such as vitamins A, B, C, potassium, phosphorus, protein, fat, carbohydrates and iron, so that eggplant plants have great potential to be developed intensively as a significant contributor to the diversity of nutritious food for the population. The study aims to determine the effect of interaction between PGPR and amino acid concentration treatments and the effect of each PGPR and amino acid concentration treatment on eggplant plant productivity. The research method used a factorial Randomized Block Design (RAK), with two treatment factors and 3 (three) replications. The first factor is PGPR concentration (P), P1: 5 ml/liter, P2: 10 ml/liter, P3: 15 ml/liter. The second factor is Amino Acid concentration (A), A1: 2 ml/liter, A2: 4 ml/liter, and A3: 6 ml/liter. These treatments were combined and 9 treatment combinations were obtained. Data analysis used Analysis of Variance (Anova) with a significance level of 5%. The treatments that had a significant effect were further tested using Duncan's New Multiple Range Test ? 5% (DNMRT). The variables observed were plant height, stem diameter, number of fruits, fruit diameter and fruit weight. The results of the study showed that there was no interaction between the treatment of PGPR concentration and amino acids on eggplant plant productivity. The single treatment of PGPR and amino acids obtained PGPR 15 ml/liter and amino acids 4 ml/liter were the treatments that had the best effect on eggplant plant productivity.
The Influence of Bridge Maintenance Strategies to Extend Service Life in Civil Engineering: A Meta-Analysis Study Krisdiyanto, Aris; Dewi, Kemmala; Santosa, Tomi Apra
Open Science and Technology Vol. 4 No. 2 (2024): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v4i2.138

Abstract

Pemeliharaan jembatan merupakan elemen krusial dalam manajemen infrastruktur teknik sipil untuk memastikan keberlanjutan fungsi struktural dan keselamatan pengguna. Penelitian ini bertujuan untuk menganalisis secara meta-analitis pengaruh berbagai strategi pemeliharaan jembatan terhadap perpanjangan umur layanannya. Data diambil dari  15 studi yang mencakup strategi pemeliharaan preventif, prediktif, korektif, hingga rehabilitasi penuh, serta penggunaannya pada jembatan dengan beragam kondisi lingkungan dan material. Hasil meta-analisis menunjukkan bahwa  strategi pemeliharaan jembatan memiliki pengaruh signifikan terhadap perpanjangan umur layanannya dengan nilai ( d= 0.825 ; p < 0.001) kategori effect size yang tinggi. Temuan ini memberikan informasi penting dalam pemeliharaan jembatan dalam teknik sipil. Bridge maintenance is a crucial element in civil engineering infrastructure management to ensure the sustainability of structural functions and user safety. This study aims to conduct a meta-analytical analysis of the impact of various bridge maintenance strategies on extending their service life. Data were collected from 15 studies covering preventive, predictive, corrective maintenance strategies, and full rehabilitation, as well as their application to bridges with diverse environmental conditions and materials. The results of the meta-analysis indicate that bridge maintenance strategies have a significant impact on extending their service life, with a high effect size (d = 0.825; p < 0.001). These findings provide important insights into bridge maintenance in civil engineering.
Species Diversity and Estimation of Aboveground Carbon Stocks in Beach Forests, Hatusua Village, Maluku, Indonesia Irwanto, Irwanto; Sahupala, Andjela; Tetelay, Febian F; Komul, Yulianus D
Open Science and Technology Vol. 4 No. 2 (2024): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v4i2.141

Abstract

Hutan pantai memiliki peran ekologis yang penting dalam menjaga keseimbangan ekosistem pesisir, termasuk dalam menyerap karbon dan mendukung keanekaragaman hayati. Penelitian ini bertujuan untuk menganalisis keanekaragaman jenis pada berbagai tingkat pertumbuhan vegetasi dan menduga cadangan karbon atas permukaan di hutan pantai Negeri Hatusua, Kecamatan Kairatu, Kabupaten Seram Bagian Barat, Maluku. Analisis keanekaragaman menggunakan indeks Shannon-Wiener dan pendugaan cadangan karbon dilakukan dengan metode non-destruktif dan destruktif, mencakup pohon, nekromas, tumbuhan bawah, dan serasah. Hasil penelitian menunjukkan bahwa tingkat semai memiliki nilai keanekaragaman tertinggi (H’ = 2.48), diikuti oleh pancang (H’ = 2.18), pohon (H’ = 1.59), dan tiang (H’ = 1.22). Kerapatan vegetasi mencerminkan pola regenerasi alami hutan, dengan tingkat semai mencapai 130,500 individu/ha, namun mengalami penurunan signifikan pada tingkat pancang (1,920 individu/ha), tiang (460 individu/ha), dan pohon (100 individu/ha). Sedangkan total cadangan karbon atas permukaan mencapai 89.41 ton/ha, dengan pohon sebagai penyimpan karbon terbesar (83.87 ton/ha atau 93.81% dari total karbon), dan serapan karbon dioksida mencapai 327.83 ton/ha ekuivalen. Beach forests play a crucial ecological role in maintaining the balance of coastal ecosystems, including carbon sequestration and biodiversity support. This study aims to analyze species diversity at various vegetation growth stages and estimate aboveground carbon stocks in the coastal forest of Negeri Hatusua, Kairatu District, West Seram Regency, Maluku. Diversity analysis was conducted using the Shannon-Wiener index, while carbon stock estimation was carried out using non-destructive and destructive methods, covering trees, necromass, understory vegetation, and litter. The results show that the seedling stage has the highest diversity value (H’ = 2.48), followed by the sapling (H’ = 2.18), tree (H’ = 1.59), and pole (H’ = 1.22) stages. Vegetation density reflects the natural regeneration pattern of the forest, with seedlings reaching 130,500 individuals/ha, but significantly decreasing at the sapling (1,920 individuals/ha), pole (460 individuals/ha), and tree (100 individuals/ha) stages. The total aboveground carbon stock was found to be 89.41 tons/ha, with trees serving as the most significant carbon reservoir (83.87 tons/ha or 93.81% of the total carbon). In comparison, carbon dioxide sequestration reached 327.83 tons/ha equivalent.
Economic Analysis of the Losses of Oil Palm (Elaeis guineensis Jacq.) Loose Fruits on Flat Terrain at Agritasari Prima Ltd. Rannando; Tujannah, Mawaddah; Azmi, Yudia; Sahfitra, Angga Ade
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.144

Abstract

Aims and Methods: Oil palm is a strategic commodity that contributes significantly to Indonesia's economy. The losses of oil palm loose fruits during the harvesting and transportation processes of fresh fruit bunches (FFB) pose a serious challenge for oil palm plantation industry, with potential losses reaching 3–7% of total production. This study aims to analyze the distribution pattern of the losses of loose fruits at three observation points (weed circle, carrying market, and harvest collection point (HCP)) at Agritasari Prima Ltd., calculate the economic loss due to these losses, and identify the causative factors. This study employs a qualitative descriptive survey method with sampling at three plantation divisions on flat terrain, covering 1,260 weed circles, 21 carrying markets, and 144 HCPs.Results: The highest loss distribution occurred at carrying market (47.66 fruits/carrying market), followed with weed circle (10.15 fruits/circle) and HCP (8.14 fruits/site). The total economic loss reached IDR 463,143.83, with the largest contribution coming from the losses at weed circle of 85.44% (IDR 395,808), followed by HCP of 7.86% (IDR 36,307), and carrying market of 6.70% (IDR 31,028.83). The annual economic loss due to the losses of loose fruits on flat terrain at Agritasari Prima Ltd. is estimated at IDR 2,178,282,597.31 (around IDR 2.18 billion per year). Major causative factors comprise poorly maintained weed circles, overloaded wheelbarrows, poor route infrastructure at carrying markets, and suboptimal handling at HCPs.Conclusion: Implementation of regular maintenance programs, standardization of vehicles’ capacity, infrastructure improvements, and digital monitoring systems are recommended to reduce the level of losses of loose fruits and improve oil palm plantation operational efficiency.
Effect of Soil Ameliorations on Cucumber (Cucumis sativus L) Yield and Soil Physico-chemical Properties in an Ultisol of Southeastern Nigeria Ikeh, Angus Onwudiwe; Sampson, Helen Udoma; Ukabiala, Maduabuchi Ekeoma; Anonaba, Nkechinyere Kate; Okamigbo, Juliana Nkiru; Akuwueze, Chiamaka Gloria
Open Science and Technology Vol. 5 No. 1 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i1.146

Abstract

Methods and Aims: Field experiment was conducted at Ndikpa, Umuowa Ibu 1 via National Horticultural Research Institute (NIHORT), Okigwe Sub-Station Imo state, Nigeria in 2021 and 2022 to assess the effects of different soil amelioration on performances of cucumber and soil physico-chemical properties. The treatments were organic fertilizers (goat manure, cow dung, and wood ash) and recommended dose of inorganic fertilizer (250 kg/ha NPK), and control (no soil amendment). The experiment was laid out in a randomized complete block design and replicated thrice. Soil, growth, and yield data were collected and subjected to analysis of variance. Significant means were compared with the least significant difference at 5% probability level. Result: Results showed that cow dung had the highest organic matter content after harvesting, 2.55 and 2.43 % in 2021 and 2022, while the least organic matter content of 0.71% and 0.65 % was recorded in the control. Wood ash had significantly higher K levels after harvesting, while cow dung had the highest Ca. Goat manure had significantly higher Mg and Na than the other soil amendments. Treatment of NPK had significant fruit yield of 21.12 and 22.54 t/ha in both cropping seasons, respectively. The fruit yield recorded in goat manure was 20.23 and 20.81 t/ha in both cropping seasons, while 19.80 and 17.99 t/ha fruit yield were recorded in the wood ash treatment. The fruit yield obtained from NPK treatment was not significantly different when compared with yields obtained from goat manure and cow dung treatments. The least fruit yield, 5.12 and 6.03 t/ha in 2021 and 2022 was recorded in the control treatment. Conclusion: Based on the study findings, the application of organic soil ameliorations (cow dung and goat manure) was recommended for higher fruit yields and sound soil conservation practices for sustainable crop production in an ultisol.
Scenario-Based Assessment of Indonesia’s Blue Carbon Systems under Restoration and Engineering-Integrated Pathways Mustofa, Ikrom; Islami, Nur Indah; Darmawan, Ibnu; Azril, Muh; Puspitasari, Rifcha Ayu Dian; Wacano, Dhandhun
Open Science and Technology Vol. 5 No. 2 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i2.168

Abstract

Aims: This study assesses the future potential of Indonesia’s blue carbon ecosystems from an environmental and climate engineering perspective, focusing on mangroves, seagrass beds, and saltmarshes.Methods: Using a desk-based mixed-methods approach, it synthesizes secondary data from global and national sources to compare three development trajectories: Business as Usual, restoration-driven, and engineering-integrated pathways. Rather than relying on spatial modeling or site-specific measurements, the analysis applies an engineering-oriented synthesis that links published ecosystem extent and carbon metrics with documented coastal engineering and restoration cases to infer comparative future carbon performance and resilience.Result: The findings indicate that blue carbon systems can deliver substantially greater and more durable climate benefits when ecological conservation is combined with engineered–nature interventions such as hybrid infrastructure, sediment enhancement, and green coastal buffers. These approaches not only enhance long-term carbon sequestration but also strengthen shoreline protection, biodiversity, and coastal livelihoods. The study identifies persistent gaps in policy integration, financing, and coastal design standards that limit implementation and proposes strategic recommendations for embedding engineering-enhanced blue carbon solutions into Indonesia’s climate policies, including Nationally Determined Contributions, and coastal development planning.Conclusion: Overall, the paper demonstrates the feasibility and relevance of integrating environmental engineering into blue carbon strategies to support climate-resilient coastal development in Indonesia.
Mangrove Fruits for Biofuel Production in Indonesia within the Framework of Climate Change Mitigation: A Literature Review of Technical and Policy Aspects Mustofa, Ikrom; Nabilah, Rizka; Setyawan, Bagus Dwi
Open Science and Technology Vol. 5 No. 2 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i2.169

Abstract

Aims: This study assesses the potential of mangrove fruits as a sustainable feedstock for biodiesel production to support climate change mitigation and adaptation in coastal regions.Methods: A peer-reviewed literature published between 2008 and 2025 was conducted to evaluate oil yield, fatty acid composition, and conversion challenges associated with mangrove-based biodiesel.Result: Quantitative findings show that several mangrove species exhibit exceptionally high oil content, notably Cerbera manghas Linn., with oil yields reaching 67.1%, significantly exceeding many conventional biodiesel feedstocks. Other promising species include Suaeda salsa (Linn.) Pall. (40%) and Wikstroemia indica (Linn.) (up to 39%). The extracted oils contain dominant fatty acids, palmitic, oleic, and linoleic acids, indicating strong compatibility with biodiesel standards. However, elevated free fatty acid (FFA) levels present technical constraints by reducing catalyst efficiency during transesterification, highlighting the need for pre-treatment or alternative catalytic approaches. From a policy perspective, mangrove-based biofuel development aligns with Indonesia’s National Energy Policy under Presidential Regulation No. 5 of 2006, which targets 5% biofuel use by 2025.Conclusion: Overall, mangrove fruits offer high technical potential, provided that processing, infrastructure, and policy support are strengthened.
Design and Development of Solbag: An Innovative and Sustainable Learning Bag by Integration of Renewable Energy Technology Lukma, Hazairin Nikmatul; Yuana, Haris
Open Science and Technology Vol. 5 No. 2 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i2.174

Abstract

Background: Indonesia, as an equatorial country, has a large solar energy potential. The great intensity of solar radiation throughout the year makes solar panel technology an alternative source of electricity, particularly in rural locations that are not yet connected to the conventional grid.Aims: The aim of this research is to develop a prototype study bag that can utilize solar energy to charge portable electronic devices such as study lamps, using a simple electronic circuit but with stable power output. This integration of renewable energy technology can support educational activities based on environmental sustainability principles, particularly in remote areas.Methods: The research method includes the design, manufacturing and testing stages of the prototype, including empirical validity testing and theoretical validity testing by a team of experts.Result: The test results meet the theoretical validity interpretation criteria with a percentage of 93.67%, which is included in the very valid category, with a percentage of agreement value of 91.57%, which indicates the conformity of the assessment among the validators. In the empirical validity assessment, the Solbag system is able to provide an average stable voltage of 3.865 V. In addition, user analysis shows that Solbag is considered practical, functional, and contributes to increasing student awareness of the use of renewable energy.Conclusion: The solbag bag system fits within the optimal range based on prototypes and comparable goods related to portable solar study lamps, and possesses the ability to serve as an eco-friendly lighting solution for students in rural areas with limited energy access.
Fabrication of Agricultural Waste-Based Biobriquettes Using Tapioca Starch Adhesive Asmara, Sandi; Tamrin; Warji; Muhammad , Fazle; Amien, Elhamida Rezkia
Open Science and Technology Vol. 5 No. 2 (2025): Open Science and Technology
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33292/ost.v5i2.179

Abstract

Background: Energy demand continues to increase along with population growth and human activities, while the availability of fossil energy in Indonesia is becoming increasingly limited. On the other hand, agricultural biomass wastes such as cassava stems, bamboo stems, coconut shells, and corn cobs are abundantly available but have not yet been optimally utilized as alternative energy sources.Aims: The aim of this research is to to evaluate the effect of combining biomass wastes of cassava stems, bamboo stems, coconut shells, and corn cobs using tapioca starch as a binder on the physical characteristics and energy value of biobriquettes, as well as to assess their conformity with briquette quality standards as an alternative fuel.Methods: This study produced biobriquettes from cassava stems, bamboo stems, coconut shells, and corn cobs using tapioca starch as a binder with two concentrations (7% and 10%). The biobriquettes were evaluated for physical and energy characteristics, including density, moisture content, compressive strength, shatter resistance index, calorific value, and burning rate, following SNI 01-6235-2000.Result: Evaluation of biobriquette quality based on SNI 01-6235-2000 shows that all treatments meet the requirements for density, moisture content, and Shatter Resistance Index, indicating good physical quality and mechanical durability. For calorific value, only treatments P2T1, P2T2, P3T1, and P3T2 meet the minimum SNI standard (? 5,000 cal/g), while P1T1 and P1T2 do not. Overall, the biobriquettes produced have the potential to comply with SNI 01-6235-2000 as an alternative fuel, although optimization of biomass composition is still needed to improve calorific value.Conclusion: The combination of cassava stems, bamboo stems, coconut shells, and corn cobs using tapioca starch as a binder was able to produce biobriquettes suitable as an alternative fuel. Treatments P2 and P3, particularly with a 7% binder concentration, met the calorific value requirement of SNI 01-6235-2000, indicating that a lower tapioca binder concentration is more effective and has strong potential for development as a renewable energy source based on biomass waste.

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