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All Journal Samota Journal of Biological Sciences (SJBIOS)
KEVIN BRIZUELA
Central Bicol State University of Agriculture
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Medicine & Pharmacology

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Analisis Mikrobiologis Air yang Disimpan Selama Satu Minggu dari Pompa Air dan Mata Air Belum Dikembangkan di New Binanuaanan, Pili, Camarines Sur KEVIN BRIZUELA
Samota Journal of Biological Sciences Vol 4 No 2 (2025): Samota Journal of biological Sciences
Publisher : University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/vges5660

Abstract

Abstract: In Barangay New Binanuaanan, Pili, Camarines Sur, many residents not connected to the Pili Water District (PIWAD) depend on distant water pumps and springs for drinking water, which they store for later use. The safety of this stored water, particularly after prolonged storage, has not been previously assessed. This study aims to evaluate the potability of week-long stored water samples from two common sources: a private water pump (Sample 1) and an undeveloped spring (Sample 2). Using the Multiple Tube Fermentation Technique (MTFT), microbiological analyses were conducted by the Metropolitan Naga Water District to determine the presence of total and fecal coliforms. Sample 1 yielded 8.0 Most Probable Number (MPN)/100 mL for both fecal and total coliforms, while Sample 2 showed <1.1 MPN/100 mL for the same indicators. These values were compared to the Department of Health (DOH) standards for drinking water. The results indicate that only the spring water (Sample 2) remained potable after a week of storage, while the pump water (Sample 1) became microbiologically unsafe. This finding underscores the need for improved access to safe water sources and encourages further research on water quality and safe storage practices in underserved communities.    
Investigating the Durability and Life Cycle of Bioplastic Bags Made from Mixed Banana and Cucumber Peel Waste KEVIN BRIZUELA
Samota Journal of Biological Sciences Vol 5 No 1 (2025): Samota Journal of biological Sciences
Publisher : University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/g147wa32

Abstract

Plastic pollution is a serious environmental problem because traditional petroleum-based plastic bags cause air, water, and soil pollution and take many years to decompose. This study focused on using banana and cucumber peel waste to produce a more sustainable bioplastic as an alternative to traditional plastic bags. The objectives of this study are: (1) to develop a method for creating bioplastic bags from mixed banana and cucumber peel waste by determining the necessary steps involved in the process, (2) to determine the durability of bioplastic bags made from mixed banana and cucumber peel waste in terms of tensile strength, water resistance and biodegradability, and (3) to evaluate the life cycle of bioplastic bags made from mixed banana and cucumber peel waste in terms of estimated lifespan, biodegradation process, and recommended disposal methods. The researchers used a quasi-experimental research design through an experimental procedure by collecting, cleaning, and shredding the peels into small pieces. The materials were then mixed with agar-agar, glycerin, and borax, heated and stirred to form a mixture, poured into molds, and dried to produce bioplastic sheets. The results showed that the bioplastic could carry around 1.25 kg before tearing and had limited water resistance, as it became soft after about 2 hours in water. However, it demonstrated high biodegradability, fully decomposing within 9 days. The study concludes that bioplastic made from banana and cucumber peel waste is a promising, eco-friendly alternative to traditional plastic, although improvements are recommended to enhance its strength and durability.
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