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All Journal Indonesian Journal of Chemical Studies (Indones. J. Chem. Stud.) Journal of Psychology
Haviza, Nurul
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Religion Humanities Chemistry Education Physics Public Health

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MAKNA KEBAHAGIAAN ANAK PANTI ASUHAN MUHAMMADIYAH LHOKSEMAWE Haviza, Nurul; Jj, Thats Maharani; Mutmainnah, Fauziah; Asyura, Nazwa; Khatimah , R A Husnul
Journal of Psychology Vol. 1 No. 4 (2025): Mei
Publisher : Yayasan Nuraini Ibrahim Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70248/jp.v1i4.2583

Abstract

Penelitian ini bertujuan untuk memahami makna kebahagiaan yang dialami oleh anak-anak yang tinggal di Panti Asuhan Muhammadiyah Lhokseumawe berdasarkan teori kebahagiaan dari Martin E.P. Seligman. Metode penelitian yang digunakan adalah pendekatan kualitatif dengan metode fenomenologis, melalui wawancara mendalam terhadap lima orang anak laki-laki sebagai subjek penelitian. Hasil penelitian menunjukkan bahwa makna kebahagiaan pada anak panti asuhan tercermin dalam tiga aspek utama, yaitu relasi positif yang terjalin dengan teman sebaya dan pengasuh, keterlibatan penuh dalam aktivitas seperti bermain dan kegiatan keagamaan, serta penemuan makna dalam kehidupan sehari-hari melalui kontribusi sosial dan cita-cita pribadi. Simpulan penelitian ini menunjukkan bahwa anak-anak di panti asuhan mampu merasakan kebahagiaan yang autentik dan bermakna meskipun dalam keterbatasan, dan pendekatan psikologi positif terbukti relevan dalam memahami kesejahteraan psikologis mereka. Kata Kunci: Kebahagiaan, Anak Panti Asuhan, Relasi Positif, Keterlibatan, Makna Hidup
Enzymatic Biodegradation of Polyethylene Terephthalate (PET) by Crude Lipase from Geotrichum candidum Haviza, Nurul; Armaini; Syafrizayanti, Syafrizayanti
Indonesian Journal of Chemical Studies Vol. 4 No. 2 (2025): Indones. J. Chem. Stud. December 2025
Publisher : Indonesian Scholar Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55749/ijcs.v4i2.90

Abstract

The issue of plastic waste, particularly polyethylene terephthalate (PET), has become a major global environmental concern due to its resistance to natural degradation. One promising approach to addressing PET waste is the use of lipase enzymes produced by microorganisms. This study aims to explore the potential of the fungus Geotrichum candidum J1 to produce crude lipase enzymes capable of degrading PET plastic. The research involved stages including isolation and rejuvenation of the fungus, enzyme production through solid-state fermentation, and lipase activity assay using the cup-plate method. Subsequently, PET degradation testing was carried out using the crude enzyme extract under controlled conditions for 30 days. The results indicated that the crude lipase from G. candidum J1 exhibited lipolytic activity, as evidenced by clear zones formed on selective media. The average total protein yield reached 2.992 ± 0.05 mg/mL, indicating stable fermentation. Degradation tests showed a weight loss of PET between 5.9% and 6.4%. Characterization by Fourier Transform Infra Red (FTIR) confirmed the cleavage of ester bonds in PET structure, evidenced by spectral changes in carbonyl groups. Observations using a Scanning Electron Microscope (SEM) revealed morphological changes, including cracks and pores, on the PET surface post-treatment. In conclusion, the crude lipase from G. candidum J1 demonstrates significant potential as a biodegradation agent for reducing PET plastic pollution in an environmentally friendly manner.
Co-Authors Armaini Asyura, Nazwa JJ, Thats Maharani Khatimah , R A Husnul Mutmainnah, Fauziah Syafrizayanti, Syafrizayanti Zuhri Efendi