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Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Published by Universitas PGRI Palembang
ISSN : 1829586X     EISSN : 25810170     DOI : -
Core Subject : Science, Education, Agriculture,
Agriculture, Biological Sciences & Forestry Chemistry Mathematics Physics
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam with registered number ISSN 1829 586X (print) and ISSN 2581-0170 (online) is a scientific journal managed and published by Faculty of Mathematics and Natural Science, Universitas PGRI Palembang. Sainmatika Journal publishes research articles from laboratory or field experiment as well as theoretical and elaborative research in field of Basic Sciences; Mathematics, Chemistry, Physics and Biology. This journal accepts articles in Indonesian or English. This journal is published twice a year in June and December.
Arjuna Subject : -
Articles 509 Documents
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The Effect of Different Dosages of Arbuscular Mycorrhizal Fungi on the Growth of Oil Palm (Elaeis guineensis Jacq) Seedlings in the CV. Gotama Nursery Thasya Meilayathi; Astri Febrianni; Rismarini; Waliah Nur Rahayu
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.20493

Abstract

This study aims to evaluate the effect of various dosages of Arbuscular Mycorrhizal Fungi (AMF) on the growth of oil palm (Elaeis guineensis Jacq) seedlings during the nursery phase. The FMA treatments consisted of 5 grams, 12.5 grams, 15 grams, 17.5 grams, and 20 grams, alongside a control group without AMF application. Key observed variables included plant height, leaf length, leaf width, leaf count, and phosphorus (P) availability in the growing medium over a one-month period. The results demonstrated that AMF application significantly enhanced plant height, leaf length, leaf number, and phosphorus availability in the medium. The 20-gram AMF dosage yielded the most favorable outcomes, with average plant height reaching 22.2 cm by the fourth week and phosphorus availability peaking at 1209.75 ppm—substantially higher than the control group. However, leaf width did not exhibit a significant increase during the observation period, likely due to genetic and environmental factors. In conclusion, optimal AMF dosages (15–20 grams) effectively promote vegetative growth of oil palm seedlings and improve phosphorus availability in the growing medium. Therefore, precise AMF application can support sustainable success in oil palm seedling cultivation.
Incidence of Banana Leaf-Rollers Caterpillar (Erionota thrax L.) Attack on Banana Mas (Musa acuminata), South Sumatra Arsi; Suparman; Harman Hamidson; Titi Tricahyati; Muhammad Luthfi Kusuma
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.21399

Abstract

Banana plants are among the tropical fruit crops widely cultivated in Indonesia. Banana cultivation is not immune to pests that can reduce banana production. One pest that attacks banana plants is the banana skipper (Erionota thrax L.). This pest is characterized by its method of attacking plants: rolling up banana leaves. Indonesia is known as one of the world's banana producers. The purpose of this study was to determine the level of attack caused by leaf-rolling caterpillars on plantain trees in South Sumatra. This study used the Purposive Sampling method, while the data collection technique was carried out by taking samples from banana plants (Musa acuminata) affected in South Sumatra, consisting of 5 regencies/cities, namely Banyuasin Regency, Muara Enim Regency, Ogan Ilir Regency, East Ogan Komering Ulu Regency, and Lubuk Linggau City. Based on the research results, the highest percentage of affected banana clumps was in East OKU Regency at 29%, while the lowest was in Lubuk Linggau City at 13%. The highest number of affected banana stems was in Ogan Ilir Regency at 26%, and the lowest was in Banyuasin Regency at 11%. The highest percentage of attacks was in Lubuk Linggau City at 46.67%, and the lowest was in Banyuasin Regency at 34.78%. Lubuk Linggau is located in the lowlands and midlands, which provide E. thrax with suitable temperatures, resulting in healthier banana plants and better food for the larvae.
Diversity of Pathogenic Fungal Leaf Blight on Corn Plants In Tanjung Pering Village, North Indralaya District Harman Hamidson; Arsi; Suparman; Titi Tricahyati; Septya Ayu Dwintha
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.21422

Abstract

The decline in corn production due to leaf blight reached 15%, equivalent to US$1.0 billion. In South Sumatra, the incidence of leaf blight disease in corn plants reached 98%. However, there have been few reports on the various pathogens that can cause corn leaf blight in South Sumatra. The purpose of this study was to determine the incidence of disease, the intensity of disease attack, and the diversity of fungal pathogens causing leaf blight disease in Tanjung Pering Village, North Indralaya, South Sumatra. The methods used in this study were observation of disease incidence and disease attack intensity, and purposive random diagonal sampling of plants. Observations were conducted at weekly intervals for five times, and the plant samples were identified at the Plant Pathology Laboratory of the Department of Plant Pests and Diseases. The results show that the incidence of corn leaf blight reached 100% with an average disease intensity of 28.60%. Identification of the pathogens causing the disease revealed differences in fungal species and numbers between observations. The diversity index for each observation was <1, and the dominance index was small or close to 0. The pathogenic fungi causing corn leaf blight consisted of B. sacchari, B. maydis, B. panici-miliacei, B. oryzae, H. juglandinum, H. microsorum, H. quercicola, H. velutinum, C. pseudobrachyspora, and C. dactyloctenicola. Thus, based on the observation results, the intensity of leaf blight disease attack was classified as low, with a low species diversity index and a low dominance index.
The Potential of Endophytic Fungi from Jeruju Stems (Acanthus ilicifolius) as a Source of Antioxidant and Antibacterial Activity Noviyanto; Rian Oktiansyah; Luciana Caroline Agnesya; Okta Riya
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.21430

Abstract

The mangrove biodiversity of Indonesia is rich and offers great potential for the discovery of bioactive compounds. The mangrove plant known as jeruju (Acanthus ilicifolius) has long been used in medicine and is recognized to include endophytic fungus capable of generating biologically active secondary metabolites. This investigation's goal was to distinguish and assess endophytic fungi from the stem of A. ilicifolius as possible sources of antibacterial and antioxidant substances. After being isolated using surface sterilization techniques and cultivated on suitable media, endophytic fungi were characterized both macroscopically and microscopically. Liquid fermentation and solvent extraction were used to produce fungal extracts. Antioxidant activity was measured using the DPPH method, while antibacterial activity against many harmful bacteria was measured using the disc diffusion method. According to the results, the isolated endophytic fungus displayed a range of morphological characteristics and bioactivities. Among the isolates, BR6, which was identified as Penicillium sp., showed the greatest antioxidantsactivity with an IC50 value of 28.1 µg/mL. This isolate also shown strong antibacterial activity, has over 70% inhibition rates against Staphylococcussaureus, Bacillusssubtilis, Escherichiaccoli, and Salmonellattyphi. These findings imply that endophytic fungi from A. ilicifolius, particularly Penicillium sp., have significant potential as natural sources of antioxidant and antibacterial compounds for use in pharmaceutical and medical applications.
The Diversity of Diseases Affecting Long Beans (Vigna sinensis L.) in the Banyuasin Region Titi Tricahyati; Harman Hamidson; Erina Melani Sari; Arsi; Suparman
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.21502

Abstract

Long bean (Vigna sinensis L.) is a widely cultivated legume in Indonesia, offering significant economic potential due to its ease of cultivation. However, its productivity is often hampered by major pathogens like Uromyces appendiculatus, which causes rust disease, and various mosaic viruses. Rust disease manifests as small brown powdery spots on leaves, while viral infections can severely reduce or even eliminate fresh pod yields. This field study aimed to identify the primary diseases affecting long beans, determine their causative agents, and distinguish their specific symptoms. The research employed a survey method through purposive sampling on farmers' land. Observations were conducted across several different plots using a diagonal sampling technique at multiple points to collect plant samples. The results indicated that both fungal rust and viral mosaic are the predominant diseases impacting local crops. This inventory provides essential data for farmers to better recognize and differentiate symptoms, ultimately supporting more effective disease management and safeguarding the economic value of long bean production in the region.
Comparison of the Newton–Raphson and Secant Methods in a Simple Pendulum Model Naufal Afi Adani; Anindhita Maheswari; Ari Wibowo
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.21526

Abstract

Various problems in mathematics and physics, including the nonlinear pendulum model, cannot be solved analytically, so numerical methods are used to obtain approximate solutions with a certain error tolerance. This study compares the Newton–Raphson and Secant methods in solving nonlinear equations in a pendulum system based on iteration count, error, and convergence stability using a comparative quantitative approach.  The results show that neither method is absolutely superior, as both successfully produced approximate solutions. The value of θ (angular displacement) decreases as the pendulum length (L) increases due to the proportional relationship involving potential energy and the factor mgL. The Newton–Raphson method reached the solution in 4 iterations, while the Secant method required 4–6 iterations. The average order of convergence for Newton–Raphson approaches p ≈ 2 (quadratic), whereas the Secant method approaches p ≈ 1.62 (superlinear). The differences between the two methods are more influenced by the choice of initial guesses and the respective mechanisms of each method.
Passenger’s Forecasting at Tanjung Api-Api Port Using The Eksponential Smoothing Yulia Puspita Sari; Yunita Febriani; Fisca Dian Utami; Febriyanti Himmatul Ulya
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.21544

Abstract

Tanjung Api-Api Port connects South Sumatra Province and Bangka Belitung Islands Province. A total of 15 ships divided into seven trips per day cross the Bangka Strait. Sea transportation is more popular among passengers because it is cheaper than air transportation. Forecasting passenger growth is necessary as a basis for improving passenger services. The forecasting method used is the Exponential Smoothing method, as passenger data over the past five years at Tanjung Api-Api Port shows a seasonal trend. The historical data used is passenger departure and arrival data. The results of the analysis show that departure passenger data is modelled using the Simple Seasonal model, while arrival passenger data is modelled using the Winter Additive model. The departure passenger data forecast shows a stable and consistent trend without any major spikes as in the previous period. Meanwhile, the arrival passenger data forecast shows a gradual and upward trend. The accuracy of the model obtained for forecasting departure passenger data was 76.5%, and the accuracy of the model for forecasting arrival passenger data was 81.86%. With the accuracy of the model obtained, passenger growth forecasts can be used as a reference for policies in managing facilities at Tanjung Api-Api Port.
Clove Powder and Oil Effects on Polyurethane Foam Density, Crystallinity, and Antimicrobial Activity Erfina Oktariani; Dindasuci Mulyasih; Eriska Oktaviani
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.21599

Abstract

Polyurethane (PU) foam is widely used as an insulation material; however, its porous structure increases susceptibility to microbial growth. This study compares the effects of clove leaf powder and clove oil (Syzygium aromaticum) as natural additives on the density, crystallinity, and antimicrobial activity of PU foam. PU foam was synthesized via a one-shot method using a polyol-to-isocyanate ratio of 1:1.6, followed by the incorporation of clove leaf powder (0–5 wt%) and clove oil (0–15 wt%). Density was measured, crystallinity was analyzed using Differential Scanning Calorimetry (DSC), and antimicrobial activity was evaluated against Escherichia coli. The addition of clove leaf powder decreased density due to non-uniform pore formation, whereas clove oil increased density, reaching approximately 0.067 g/cm³ at 15 wt%. Crystallinity increased with both additives; however, clove oil provided a more consistent enhancement, while clove leaf powder increased crystallinity up to ~15%. Antimicrobial activity was observed in all modified samples, with enhanced antimicrobial effectiveness for clove oil. Overall, clove oil outperforms clove leaf powder in improving the structural and antimicrobial properties of PU foam.
Occurrence of Jellyfish (Rhopilema hispidum and Crambione mastigophora) in Banyuasin Estuarine Waters Related to Environmental Conditions Helfa Septinar; Fauziyah
Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Vol. 23 No. 1 (2026): Sainmatika : Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/sainmatika.v23i1.21641

Abstract

Estuarine ecosystems are transitional waters characterized by high productivity and dynamic environmental conditions. In recent years, jellyfish occurrence has increasingly been reported in several coastal areas, including the Banyuasin estuary, South Sumatra. This study aimed to analyze the relationship between oceanographic parameters and jellyfish occurrence in Banyuasin estuarine waters. The research used a survey method through direct field observations conducted during seven fishing trips. Environmental parameters measured included temperature, salinity, dissolved oxygen (DO), pH, current velocity, water transparency, and depth. Total catch biomass was also recorded. Data were analyzed descriptively and using Principal Component Analysis (PCA). The results showed average environmental conditions of temperature 29.41°C, salinity 22.36 ppt, DO 6.43 mg/L, pH 6.95, current velocity 0.39 m/s, water transparency 25.56 cm, and depth 1.96 m. The total catch was dominated by shrimp at 865.50 kg (52.23%), followed by jellyfish at 541.50 kg (32.67%), fish at 208.35 kg (12.57%), and crabs at 41.90 kg (2.53%). PCA results showed that depth, water transparency, temperature, salinity, DO, and current velocity were associated with jellyfish occurrence in Banyuasin estuarine waters. These findings indicate that oceanographic conditions play an important role in supporting jellyfish occurrence and may serve as baseline information for monitoring environmental changes and managing estuarine ecosystems sustainably.

Page 51 of 51 | Total Record : 509

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