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All Journal Journal of Electrical Technology UMY Biologica Samudra
Hafizah, Annisa
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Library & Information Science Veterinary

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Abnormalitas leukosit mahasiswa perokok aktif konvensional dan elektrik di lingkungan Universitas Bangka Belitung Saidah, Saidah; Mariatulfadila, Mariatulfadila; Lisa, Lisa; Nurjanah, Nurjanah; Hafizah, Annisa
JURNAL BIOLOGICA SAMUDRA Vol 6 No 2 (2024): Biologica Samudra
Publisher : Program Studi Biologi, Fakultas Teknik, Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/jbs.v6i2.10709

Abstract

Leukosit berperan penting dalam pertahanan melawan penyakit. Kenampakan sel-sel leukosit dapat memberikan petunjuk kesehatan tubuh. Pada perokok aktif, kandungan nikotin dapat mengganggu kesehatan manusia. Studi ini bertujuan untuk membandingkan morfologi dan abnormalitas leukosit pada mahasiswa perokok aktif konvensional, pengguna rokok elektrik, dan non-perokok di lingkungan Universitas Bangka Belitung. Sampel darah segar dari masing-masing kelompok diambil dan dipreparasi untuk membuat sediaan apusan darah. Hasil pengamatan menunjukkan bahwa tidak terdapat perbedaan morfologi leukosit antara perokok aktif konvensional, perokok aktif elektrik dan non perokok. Namun, ditemukan sejumlah abnormalitas leukosit pada perokok aktif konvensional maupun elektrik. Abnormalitas yang ditemukan yakni neutrofi shift to the left, neutrofil vaskuolisasi, neutrofil dohle bodies, neutrofil piknotik, psudo pelger, sindroma chediak higashi, hipersegmentasi neutrofil, neutrofil agranular, dan granuliasi toksik. Penelitian diharapkan memberikan pemahaman tentang dampak kesehatan dari kebiasaan merokok serta untuk mendukung program kebijakan kesehatan anti-rokok dan vape di lingkungan kampus.
Development of a Hydrothermal Carbonization System for Converting Sheep Hair and Fleshing Waste into Organic Fertilizer and Its Prospective Use in Plastic Waste Processing Listyalina, Latifah; Arifin, Uma Fadzilia; Ratnaningsih, Wahyu; Juhana, Swatika; Putra, Karisma Trinanda; Hafizah, Annisa
Journal of Electrical Technology UMY Vol. 9 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jet.v9i2.28638

Abstract

Soil fertility plays a crucial role in sustaining agricultural productivity, and one effective strategy to enhance it is through the incorporation of organic matter such as humus. Although the natural process of humification requires considerable time, the resulting material greatly benefits soil structure, water retention, and nutrient availability. Modern technologies, including hydrothermal carbonization, offer the advantage of accelerating humus formation or generating comparable organic compounds within a shorter timeframe, thereby providing an efficient approach to soil enrichment. In parallel, local sheep leather tanning industries produce substantial waste, including leather scraps, sheep hair, and liquid effluents. Sheep hair is rich in keratin protein that remains underutilized, whereas fleshing waste contains proteins and fats that decompose rapidly and may cause environmental pollution if not properly managed. This study proposes a practical solution by converting such waste into organic fertilizer through hydrothermal carbonization. For this purpose, a hydrothermal reactor with a 20-liter capacity, 60 cm height, 21 cm diameter, and 10 cm wall thickness was designed to operate at 180 °C and 5 bar. Calibration of voltage, temperature, and pressure confirmed compliance with design specifications. Experimental trials using a 1:1:1 ratio of hair waste, fleshing waste, and water yielded 2,150 g of solid organic fertilizer and 2,070 g of liquid product, corresponding to an overall yield of 56.26%. In future work, the hydrothermal carbonization approach demonstrated in this study may be extended to plastic waste processing, since the similarity in carbon-rich feedstock composition allows potential adaptation of this system to convert polymeric waste into carbonaceous or biochar-like products, supporting circular-economy initiatives and sustainable material recovery through integrated organic and plastic waste treatment.
Co-Authors Juhana, Swatika Karisma Trinanda Putra, Karisma Trinanda Lisa Lisa, Lisa Listyalina, Latifah Mariatulfadila, Mariatulfadila Ratnaningsih, Wahyu Saidah Saidah Uma Fadzilia Arifin, Uma Fadzilia