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20 articles for “Sumatra”
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Research ArticleOpen accessEvery word in the titleBiodiversity and Spatial Distribution of Hornbills in Pondok Buluh Educational Forest, North Sumatra, IndonesiaBudi Utomo, Nabillah Saraswita, Cindy Siahaan et al.Hornbills are large birds, several species of which are protected under national and international conservation legislation and face significant extinction risk. This study was conducted in the Specific Purposes Pondok Buluh Forest Area, North Sumatra, Indonesia, with the aim of identifying hornbill species present, estimating their population density, and characterizing their habitat. Hornbill surveys were carried out using the point … …OnLine Journal of Biological Sciences, Vol. 26, Issue 1 · 28 Mar 2026 · 1,405 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleScreening of Blast Resistance Genes from South Tapanuli Rice Cultivars, North Sumatra, IndonesiaSaleha Hannum, Hesti Wahyuningsih, Riyanto Sinaga et al.Rice blast disease caused by a phytopathogenic fungus, Magnaporthe oryzae, has been considered as a major threat to global rice productivity, including Indonesia. South Tapanuli is a regency in North Sumatra, known for its intensive and significant rice production activities. A collection of 13 rice cultivars originating from the region, is claimed for its resistances against the rice blast disease … …OnLine Journal of Biological Sciences, Vol. 20, Issue 2 · 25 May 2020 · 7,537 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFractionated Distillation Behavior and Aroma Component Enrichment of Citronella Oil (Cymbopogon winterianus Jowitt) from West SumatraDaimon Syukri, Anni Faridah, Bayu Indra Lesmana et al.This study aimed to separate the constituent components of citronella oil into several fractions with high purity and to identify the characteristics of the resulting fractions. The research was conducted using an exploratory approach to investigate the fractionation behavior of citronella oil more deeply. The raw materials were citronella oils obtained from three regions in West Sumatra: Batusangkar, Solok, and … …OnLine Journal of Biological Sciences, Vol. 26, Issue 3 · 10 Aug 2026 · 849 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMolecular Identification and Antioxidant Profiling of Penicillium heteringtonii EUA-017 from Mangrove (Avicennia alba) in West Sumatra, IndonesiaAnthoni Agustien, Djong Hon Tjong, Yetria Rilda et al.Mangrove ecosystems harbor diverse endophytic fungi that produce bioactive secondary metabolites with potential antioxidant activities. This study aimed to identify an endophytic fungal isolate (EUA-017) from Avicennia alba mangroves in West Sumatra, Indonesia, and characterize its antioxidant metabolites. Molecular identification was performed using internal transcribed spacer (ITS) region sequencing. Secondary metabolites from ethyl acetate extracts were characterized using Fourier-transform infrared … …OnLine Journal of Biological Sciences, Vol. 25, Issue 4 · 25 Mar 2026 · 1,410 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSMEs Strategies to Improve the Competitiveness of Dairy Products in West Sumatra Province, IndonesiaRahmi Wati, Firwan Tan, Donard Games, Endrizal RidwanConsidered a side business, most dairy farms in Indonesia are small-scale farms with low productivity. Farmers tend to sell the milk produced in the form of fresh milk rather than processed products. This condition causes low competitiveness of dairy products and the difficulty of dairy products penetrating the modern market. This study aims to identify factors that determine competitiveness and … …American Journal of Animal and Veterinary Sciences, Vol. 18, Issue 2 · 28 Jun 2023 · 5,980 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleEvaluation of the Digestibility of Various Types of Swamp Grass in South Sumatra on Pampangan Local Buffalo using the in Sacco MethodArmina Fariani, Gatot Muslim, Anggriawan N.T. Pratama, Lili WarlyThis study aims to determine the digestibility value and degradation rate of various types of swamp grass in Sacco in local Pampangan buffalo in South Sumatra. The design used in the study was a completely randomized design consisting of 6 treatments and three replications. The treatments tested were six types of swamp grass which were then coded for each treatment … …American Journal of Animal and Veterinary Sciences, Vol. 16, Issue 3 · 25 Aug 2021 · 6,909 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFactors Influencing Livestock Investment Decisions in West Sumatra: A Social Capital in Business Scheme Known as SeduaanFitrimawati, JafrinurThis study aimed to analyze the effect of social capital on investment decision making in the business of smallholder cattle breeding with the same system. The data of this research were gathered through surveys and interviews with farmers and investors in Cow business in the province of West Sumatra. Data collected is in the form of latent constructs analyzed through … …American Journal of Animal and Veterinary Sciences, Vol. 15, Issue 2 · 21 May 2020 · 6,817 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIonospheric Total Electron Content Response to the December 26, 2004 North Sumatra EarthquakeA. Abdullah, A. F.M. Zain, M. H. Jusoh et al.Problem statement: Ionospheric precursors of earthquake have been studied by scientists and seismologists. This study aims at examining the relationship between the ionosphere and earthquake precursors. The effects of the anomalous electric field that penetrates the ionosphere on the electron concentration can be measured experimentally. This study reports on the variability of the Total Electron Content (TEC) during the December … …American Journal of Applied Sciences, Vol. 6, Issue 4 · 30 Apr 2009 · 7,908 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleCombination of Organic, Chemical and Biological Fertilizers to Accelerate Mangrove Growth on the East Coast of Sumatra, IndonesiaBudi Utomo, Yuda Ilham Ramadhan, Yunasfi et al.Efforts to rehabilitate mangroves often do not yield satisfactory planting results. Low maintenance measures due to the tidal situation of the area make it difficult for rehabilitation actors to carry out fertilization and insertion. This study aims to increase the growth of Rhizophora mucronata with fertilization treatment during planting with various biological fertilizers. The study was designed using a completely … …OnLine Journal of Biological Sciences, Vol. 25, Issue 3 · 24 Oct 2025 · 2,498 accessesView PDFCite
Research ArticleOpen accessIn the abstractFirst Morphoanatomical and Cytogenetic Characterization of Picria fel-terrae Lour.: A Local Accession from Dairi Regency, IndonesiaElimasni, Deny Supriharti, HaryatiPoguntano (Picria fel-terrae Lour.) plant has been widely recognized for its medicinal properties due to its bioactive compounds. However, fundamental biological studies, particularly on its phenological and cytogenetic characteristics, remain limited. This study aimed to characterize the vegetative morphology and karyotypic features of P. fel-terrae from Dairi Regency, North Sumatra, to provide a comprehensive cytogenetic database for future study and … …OnLine Journal of Biological Sciences, Vol. 26, Issue 2 · 17 Jul 2026 · 745 accessesView PDFCite