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All Journal Biosfer: Jurnal Tadris Biologi Biology, Medicine, & Natural Product Chemistry Jurnal Rekayasa Hijau Jurnal Ilmiah Biologi Eksperimen dan Keanekaragaman Hayati (J-BEKH) Abdi Geomedisains Inornatus: Biology Education Journal Journal Of Sustainability Perspectives Organisms: Journal of Biosciences
Suci Wulan Pawhestri
Faculty of Science and Mathematics, DiponegoroUniversity, Semarang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Dentistry Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology Medicine & Pharmacology Nursing Public Health Social Sciences Veterinary Other

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The combination tea of corn silk (Zea mays L.) and rosella flowers (Hibiscus sabdariffa L.): Antioxidant levels using different drying methods Ulmillah, Aulia; Suri, Intan Mulia; Kamelia, Marlina; Pawhestri, Suci Wulan
Inornatus: Biology Education Journal Vol. 2 No. 2 (2022): Inornatus: Biology Education Journal
Publisher : Univeritas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/inornatus.v2i2.354

Abstract

Corn silk and rosella flowers are plants whose utilization can still be developed, especially in the food sector. The secondary metabolites found in both plants serve as a source of natural antioxidants to combat free radicals. This study aims to examine the effect of variations in drying methods on the antioxidant activity content of a combination tea of corn silk and rosella flower. Antioxidant level test using the DPPH method. Analysis of antioxidant data in the form of determining the IC50 value using probit linear regression analysis. The study results show that drying using the oven method has an IC50 of 83 ppm while drying in the sun has an IC50 of 121 ppm. Research findings indicate high antioxidant levels in a combination of corn silk and rosella flower tea through oven drying and moderate antioxidants in direct drying in the sun.
Analysis of Microplastic Abundance on the Coast of South Lampung as a First Step in Pollution Control Marlina Kamelia; Aulia Ulmillah; Pawhestri, Suci Wulan
ORGANISMS: JOURNAL OF BIOSCIENCES Vol. 5 No. 2 (2025): Organisms: Journal of Biosciences
Publisher : Pusat HKI, Paten, dan Publikasi Ilmiah Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/vegft214

Abstract

Microplastics pose serious threats as they can  contaminate various ecosystems, ranging from seawater surfaces, beach sands, freshwater sediments, coastal sediments, to deep-sea environments. Their presence, particularly in coastal areas, exerts significant negative impacts on ecosystem balance and human health. This study aimed to analyze the types and abundance of microplastics in seawater and sediments of South Lampung’s coastal area, measure related environmental parameters (BOD, COD, pH, temperature, and current velocity), and provide baseline data to support strategies for pollution control. The research was conducted using an experimental method at six stations located 50–100 meters apart. Water and sediment samples were collected, filtered, separated, and analyzed using Fourier Transform Infrared Spectroscopy (FTIR) to identify polymer types. The results revealed that microplastics were detected at all stations, with dominant polymers including polyethylene (PE), polypropylene (PP), polyester (PES), polystyrene (PS), and smaller amounts of polyamide. Physico-chemical parameters of the waters were generally within acceptable thresholds, although BOD levels at several stations slightly exceeded the quality standards, indicating a relatively high organic load. This study confirms that microplastic pollution has already occurred in the South Lampung coastal area, dominated by polymers originating mainly from anthropogenic activities such as household waste, synthetic textiles, and coastal activities. As such, this research provides an essential initial step in mapping microplastic pollution in the region.  
Co-Authors Andandaningrum, Della Apriliano, Amanda Aulia Ulmillah Aulia Ulmillah Bambang Budiwiranto Chairul Anwar Fauziah, Hanifah Nur indah marlina ardianti Jamaluddin, Wan M Rizky Ismail Marlina Kamelia Nanang Supriadi Oktarina, Depi Panggabean, Siti Munawarah Rina Budi Satiyarti, Rina Budi Suri, Intan Mulia Tama, Dwi Sulis Triyana, Agis Vantika, Marsela Ayu