Author

Anthoni Agustien

Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Padang,, Indonesia

9 articles in our journals

Articles where this person is an author, newest first. People are matched by their name as printed (no ORCID iD is recorded for them), not by name alone; search the name as text to find namesakes too.

Research ArticleOpen accessMolecular 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 PDF Cite

Research ArticleOpen accessOptimization of Temperature and pH for Protease Production from Some Bacterial Isolates of Mangrove WatersFeskaharny Alamsjah, Yorasakhi Ananta, Anthoni AgustienProtease enzymes are widely used in biotechnology to produce amino acids and peptides from high molecular substrates, as well as in the leather industry for wastewater treatment, textiles, pharmaceuticals, cosmetics, leather processing, and poultry industry. Indonesia's demand for protease enzymes is increasing. This study aims to optimize the temperature and pH for the production of protease from certain bacterial isolates … …OnLine Journal of Biological Sciences, Vol. 24, Issue 4 · 11 Sep 2024 · 4,425 accessesView PDF Cite

Research ArticleOpen accessCultivation of Antioxidant-Producing Endophytic Fungus in Rhizophora apiculata Mangrove PlantsAnthoni Agustien, Putra Santoso, Siti Zaharani Zalamah et al.West Sumatra is known as one of the largest areas of mangrove forests in Indonesia, dominated by Rhizophora. Therefore, there will be huge opportunities to discover new types or strains of endophytes and antioxidant compounds, which play an important role in protecting cells caused by free radicals, preventing oxidation, and protecting the human body from ROS. This study aims to … …OnLine Journal of Biological Sciences, Vol. 24, Issue 4 · 4 Aug 2024 · 4,991 accessesView PDF Cite

Research ArticleOpen accessOptimization and Molecular Identification of Protease-Producing Thermophilic Bacterial Isolate TUA-26Anthoni Agustien, Mufidhatul Muqarramah, Feskaharny AlamsjahProtease enzymes are used as biocatalysts that can accelerate a reaction. Thermostable enzymes produced by thermophilic bacteria are needed in the industrial field because of their ability to withstand high temperatures. The thermophilic bacterial isolate TUA-26 that produces protease was to analyze the optimum conditions of temperature, pH, agitation, trace elements, carbon sources, and nitrogen sources; the stability of protease … …OnLine Journal of Biological Sciences, Vol. 24, Issue 3 · 6 Apr 2024 · 4,935 accessesView PDF Cite

Research ArticleOpen accesspH and Temperature Optimization of Several Bacterial Isolates from Mangrove Waters in the Mandeh Area to Produce Cellulase EnzymeFeskaharny Alamsjah, Dwiky Rahmadi Aswan, Anthoni AgustienEnzymes serve as vital biological catalysts, playing a crucial role in numerous industrial processes to accelerate specific biochemical reactions. In this study, we aimed to optimize cellulase enzyme production by investigating the influence of temperature and pH on four bacterial isolates: PUA-18, PUA-21, PUA-28, and PUA-38. The experiment was carried out in triplicates using a one-factor-at-a-time design, with pH and … …OnLine Journal of Biological Sciences, Vol. 24, Issue 3 · 28 Mar 2024 · 6,476 accessesView PDF Cite

Research ArticleOpen accessAntimicrobial Potential of Ethanol Extract from Some Plants Against Staphylococcus aureus and Pseudomonas aeruginosaFeskaharny Alamsjah, Anthoni Agustien et al.The number of reports of bacterial infections that are difficult to treat with antibiotics has led to the need for new alternatives for the treatment of resistant bacterial infections. One alternative is to utilize phytochemical bioactive compounds derived from natural ingredients which contain antimicrobial compounds. Some plants medicine from Sumatra island that should have potential as antimicrobials are the leaves … …OnLine Journal of Biological Sciences, Vol. 24, Issue 3 · 19 Mar 2024 · 6,890 accessesView PDF Cite

Research ArticleOpen accessExploration and Characterization of Thermophilic Bacteria from the Kerinci-Jambi Geothermal Source for Alcohol ProductionAnthoni Agustien, Weni Cahyati, Yetria RildaAlcohol produced by thermophilic bacteria is renewable and a safe fuel because it is mainly based on microbial fermentation. This research needs to be done to find out the potential alcohol production of thermophilic bacteria because have many advantages such as degrading a much wider range of carbohydrates, the possibility of direct alcohol recovery from the fermentation broth, tolerance to … …OnLine Journal of Biological Sciences, Vol. 24, Issue 3 · 10 Feb 2024 · 5,199 accessesView PDF Cite

Research ArticleOpen accessEnhanced Amylase Activity by Modulating Abiotic Factors and Enzyme Stability in the Thermophilic Bacterial IsolatesAnthoni Agustien, Denny Bendrianis, Feskaharny Alamsyah et al.Amylase is one of the enzymes that is widely used in bioprocess technology, amylase from different microbial sources also varies in form, so it is suitable for its specific application. The purpose of this study was to determine the optimum temperature, pH, agitation, and stability of the amylase enzyme from two thermophilic bacterial isolates, TUA-07 and TUA-09. This study used … …OnLine Journal of Biological Sciences, Vol. 24, Issue 2 · 7 Feb 2024 · 5,493 accessesView PDF Cite

Research ArticleOpen accessDiversity of Cellulolytic Bacteria from the Digestive Tract of Oryctes rhinoceros LarvaeAhmad Faisal Nasution, Erman Munir, Dwi Suryanto et al.Lignocellulose is a ubiquitous biopolymer that, once degraded into monomeric products, could be used to produce a wide range of products. Bioconversion using indigenous microbes could be a solution to the large array of cellulosic waste and it could be sourced from exotic organisms such as Asiatic rhinoceros beetle (Oryctes rhinoceros L). This study aimed to cellulolytic bacteria from the … …OnLine Journal of Biological Sciences, Vol. 23, Issue 4 · 2 Sep 2023 · 4,972 accessesView PDF Cite