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All Journal HAYATI Journal of Biosciences Jurnal Biologi Udayana Jurnal Pendidikan Biologi Undiksha Biotika: Jurnal Ilmiah Biologi JURNAL TEKNOLOGI LINGKUNGAN Microbiology Indonesia Buletin Plasma Nutfah Biotropika Bioeksperimen: Jurnal Penelitian Biologi BERITA BIOLOGI BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) JOHME: Journal of Holistic Mathematics Education BIOEDUSCIENCE Jurnal Biologi Tropis Jurnal Kimia Terapan Indonesia MITRA: Jurnal Pemberdayaan Masyarakat Walisongo Journal of Chemistry Molekul: Jurnal Ilmiah Kimia BAHTERA : Jurnal Pendidikan Bahasa dan Sastra Jurnal Abdi Insani BIO-EDU: Jurnal Pendidikan Biologi Jurnal Ilmiah Biologi UMA (JIBIOMA) Jurnal Pengabdian kepada Masyarakat Nusantara BONAFIDE: Jurnal Teologi dan Pendidikan Kristen Didache: Journal of Christian Education PEADA': Jurnal Pendidikan Kristen Jurnal ComunitA Servizio Lumbung Inovasi: Jurnal Pengabdian Kepada Masyarakat Oryza : Jurnal Pendidikan Biologi Prosiding Konferensi Nasional PKM-CSR JURNAL HUTAN TROPIS Inculco Journal of Christian Education JURNAL BIOLOGI PAPUA Jurnal Teknologi Lingkungan Molekul: Jurnal Ilmiah Kimia Prosiding Seminar Nasional Pengabdian kepada Masyarakat (SINAPMAS) Jurnal Biologi Udayana
WAHYU IRAWATI
Universitas Pelita Harapan
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Journal : HAYATI Journal of Biosciences

 1 
Mercury is one of the major pollutant in the environment which is highly toxic. Bioremediation strategies using bacteria have been proposed as an attractive alternative because this is effective, less expensive and more efficient to remove mercury. Brevundimonas sp. HgP1 and Brevundimonas sp. HgP2 were two highly mercury resistant bacteria isolated from a gold mine in Pongkor village with MIC of 575 ppm. The purposes of the research were to study the effect of mercury on bacterial growth and mor WAHYU IRAWATI; . PATRICIA; YENNY SORAYA; ABYATAR HUGO BASKORO
HAYATI Journal of Biosciences Vol. 19 No. 4 (2012): December 2012
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.19.4.197

Abstract

Mercury is one of the major pollutant in the environment which is highly toxic. Bioremediation strategies using bacteria have been proposed as an attractive alternative because this is effective, less expensive and more efficient to remove mercury. Brevundimonas sp. HgP1 and Brevundimonas sp. HgP2 were two highly mercury resistant bacteria isolated from a gold mine in Pongkor village with MIC of 575 ppm. The purposes of the research were to study the effect of mercury on bacterial growth and morphological changes of bacterial colony and to measure the ability of bacterial isolates to accumulate Hg2+. The growth was monitored by measuring optical density at 600 nm, whereas accumulation of Hg2+ was measured by mercury vaporation unit. This present studies revealed that the addition of 50 and 100 ppm HgCl2 in Brevundimonas sp. HgP1 resulted in the decreasing of growth rate and the elongation of lag phase in 8 and 16 hours, respectively. The addition of HgCl2 also affected morphological appearance of the bacterial colony to black. Brevundimonas sp. HgP1 accumulated  Hg2+  up to 1.09 and 2.7 mg/g dry weight of cells and removed  64.38 and 57.10% Hg2+  from the medium containing 50 and 100 ppm HgCl2, respectively.
Protein Profile and Decolorization Potential of Copper-Resistant Klebsiella pneumonia CKJ 500 2.1.2 in Response to Textile Dyes and Copper Irawati, Wahyu; Pinontoan, Reinhard; Marcellie, Jessica; Valiant, Andreas; Sugata, Marcelia
HAYATI Journal of Biosciences Vol. 33 No. 3 (2026): May 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.3.584-595

Abstract

Heavy metals and synthetic dyes are major environmental pollutants, particularly in industrial effluents. The development of effective and safe bioremediation strategies to mitigate their ecological impact is therefore critical. In this study, the copper-resistant bacterium Klebsiella pneumoniae CKJ 500 2.1.2 was investigated for its capacity to decolorize textile dyes—specifically malachite green—and its associated enzymatic activities were characterized. Bacterial resistance was assessed using Luria–Bertani agar containing varying concentrations of copper and dyes. Decolorization efficiency was evaluated spectrophotometrically, protein expression was analyzed using SDS-PAGE, and dye degradation products were identified using gas chromatography–mass spectrometry (GC-MS). The strain exhibited high tolerance to both copper and dyes, achieving 99.4% decolorization of malachite green and 81% for Congo red. The presence of copper inhibited the decolorization of most dyes, except malachite green and methylene blue. SDS-PAGE analysis identified three key enzymes: laccase (~60 kDa), manganese peroxidase (~39 kDa), and azoreductase (~22 kDa). GC-MS revealed both toxic and non-toxic degradation intermediates, indicating partial detoxification. These findings highlight the potential of K. pneumoniae CKJ 500 2.1.2 for bioremediation of dye-contaminated effluents. However, further research is required to elucidate the complete enzymatic pathways involved and to ensure environmentally safe dye degradation.
Co-Authors . PATRICIA Aaron Hasthosaputro ABYATAR HUGO BASKORO Alvionita Thana Alya Leonita Lamonta Ambarita, Polin P. Ambarita, Polin Parulian Andara Frida Sheilaliany Daely Angelica, Apriliana Anggun Anggun Aninditya Sri Nugraheni Argoby Simanullang Argorby Simanullang Artha, David Dharmawan Ashiong P Munthe Ashiong Parheheon Munthe Ayustin, Yohana Delvia Bellen Mouretta Bermuli, Jessica Elfani Bora, Merliana Ina Cantika Dela Kurnia Zendrato Charles Immanuel Chelvieana A. Christanti Christeven Mevotema Christian, Grace Purnamasari Christian, Salomo Clement Khrisman Laia Clement Khrisman Laia Daely, Andara Frida Sheilaliany Damai Yanti Manalu David L Gultom Debora V. Widyanti Delfania Apang Madao Deokward F. Ruga Desi L. Sihombing Destya Waty Silalahi, Destya Waty Dipakalyano Dipakalyano Dipakalyano, Dipakalyano Djoko Prasetyo Dominica Feni Valentina Dr. Adolf J.N. Parhusip Dwany, Naomi Dwi N. Susilowati Egilia Lucky Elisabeth Tita Ellen Nur Endah Pangesti Elysabeth Simatupang Eunike Bunga Marvella Eunike Bunga Marvella Eunike Bunga Marvella Fernando Christofer Fernando Christofer Fernando Corneles Moniharapon Fiska Ivana Pratami Putri Tokede Floreta D. Icasari Frichilya Intan Lawa Padang Gaol, Riris Lumban Geoffrey Darrien Fideli Georgine Gladis Paula Sulardi Gim Mi Kyong Giri, Mutiara Yaemeliza Venderry Grace Charity Mary Cartir Greisnaningsi Greisnaningsi Harefa, Dellania Yvonne HARI HARTIKO Helen Melenia Sianipar Herna Siahaan Hernawati Siahaan Hutauruk, Kristian I Made Samudra Imanuel Adhitya Wulanata, Imanuel Adhitya Intan Cidarbulan Matita Iren Asima Situmorang Jennie Agatherania Listira JOEDORO SOEDARSONO Josephine Elsa Diani Putranto Karnelasatri, . Keisha Hillary Pangalila Kosi, Ice Frans Krisdarwindah Mardiana Kristin Armis Pasaribu Laia , Clement Khrisman Laia, Clement Khrisman Laoli, Beta Mualiman Lastiar R. Sitompul Lastiar Roselyna Sitompul, Lastiar Roselyna Legesang, Eddowardho Otniel Lucia Kusumawati Lusiana Haris Maha, Paldevina Br Maharaja, Dwi P. Malau, Robeka Risky Manalu, Damai Y. Manalu, Damai Yanti Marcellie, Jessica Margaretha, Cecilia Marvella, Eunike Bunga Melany Djami Meyners, Geraldy John Mia Parhusip Muhamad Ananda Munthe, Ashiong P. Munthe, Sri Wahyu Ningsih Naomi Dwany Nexson Parhusip, Adolf Jan Nicolas Tunggul Adhigandewa Nida Sopiah Nida Sopiah Nida Sopiah Nommensen Pangihutan Ompusunggu Nommensen Pangihutan Ompusunggu Novera, Rusliani S. Novera, Rusliani Sesy Orah, Eklesia Taysa Pahotkon Purba Pangaribuan, Medeliene Christine Patricia Patricia Pebrianti Pebrianti, Pebrianti Pingkan Imelda Wuisan Polin Parulian Ambarita Ponagadi, Merry Adisty Prasetyo, Djoko Purba, Friska Juliana Purwanti, Ester Ayu Sri PutrI, Nadya Aurelia Ratna Rahmawati, Sintia Y. Rahul Simon Situmeang Rani Nurlina Tifen Raudhatunnur Reinhard Pinontoan Resky Megawati Tammu Resti Nopriyanti Rido, Elisabeth M.T. Rimpan, Takashi Reymond Rosiva Betaria Purba Ruben Patrick Adhiwijaya Ruth Y. Purba Sabar Manampin Giawa Salomo Christian Selvi Esther Suwu, Selvi Esther Shaday, Vannesa El Sherina Juliana Sherina Juliana Siane Indriani, Siane Siane Indriyani Sianturi, Golda Santiur Silaban, Grace Niche Agnesa Silalahi, Ramses Silvana Putri Tarigan Simamora, Tanti Marsanda Sindy Friska Siringo-ringo, Sisilya Situmorang, Stefani Situmorang, Widya Srigika Natalia Boru Ginting Stephanus Jordan Jans Steven Anggawinata Sudarsono Siburian Sugata, Marcelia Suhartono, Andreas Valiant Sukri, Urbanus Susi Sulistia Susi Sulistia, Susi Tabitha Grace Larasati Tahya, Candra Tahya, Candra J. Tahya, Candra Yulius Tammu, Reisky Megawati Thesalonika Liony Pangemanan Tinambunan , Christine Febriandini Torreno, Jovan Nathanael Tri P. Priyatno Triwibowo Yuwono Valiant, Andreas Vania Austine Callista Timotius Vannesa El Shaday Ruth Advenita Viona Heryani Arla Waruwu, A'azokhi Waruwu, Aazokhi Wuisan, Pingkan Imelda Xaveria, Jessica Yadi Suryadi Yantra Wijaya YENNY SORAYA Yesica C. Rhenata Yohana Ayustin Yohanes Edi Gunanto Yolanda, Shelomita Feby Yovanka P.P Tumakaka Zebua, Satria Putri Aryani Zega, Yeni Angelina