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All Journal HAYATI Journal of Biosciences MEDIA PETERNAKAN - Journal of Animal Science and Technology Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Ilmu Pertanian Indonesia Jurnal Fitopatologi Indonesia Jurnal Akuakultur Indonesia Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Ilmu dan Teknologi Kelautan Tropis Jurnal Akuatika Microbiology Indonesia BIOTROPIA - The Southeast Asian Journal of Tropical Biology Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Biogenesis: Jurnal Ilmiah Biologi Jurnal AgroBiogen Current Biochemistry Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Sumberdaya Hayati Elkawnie Journal of Tropical Biodiversity and Biotechnology JURNAL BIOLOGI INDONESIA Jurnal Biodjati Omni-Akuatika Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Biologi Tropis ANNALES BOGORIENSES LIMNOTEK - Perairan Darat Tropis di Indonesia Biosaintifika: Journal of Biology & Biology Education Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Riset Akuakultur Menara Perkebunan Jurnal Mangifera Edu Grouper: Jurnal Ilmiah Perikanan Konservasi Hayati Journal of Multidisciplinary Applied Natural Science Makara Journal of Science Jurnal Ilmu Kehutanan Jurnal Ilmu Kehutanan Annales Bogorienses
Iman Rusmana
Departmen Biologi, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Kampus IPB Darmaga, Bogor 16680, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Veterinary

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Trenching Construction in Peat Soil and the DGGE Analyses of nif Gene and Activity of Dehydrogenase HAPPY WIDIASTUTI; DARMONO TANIWIRYONO; IMAN RUSMANA; GALUH WENING PERMATASARI
Microbiology Indonesia Vol. 14 No. 4 (2020): December 2020
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2068.239 KB) | DOI: 10.5454/mi.14.4.2

Abstract

Basal stem rot (BSR) is a major disease in oil palm crops which also possible happen on peat soils. Ganoderma boninense is the pathogen that causes this disease infects the plants through the root. Maintaining root health expects to reduce the intensity of the occurrence of BSR disease and its spread. In this research, trenching construction and maintenance is carried out which aims to break the spread and activity of Ganoderma. Trenching maintenance is carried out by giving empty bunches oil palm inoculated with decomposer, Azotobacter inoculants and humic acid. Four treatments tested were trenched (T1) and untrenched (T0) in combination with two level of Ganoderma attack, which are moderate (Mo) and severe (Se). The soil sample were retrieved from different point, which are in the trenching area (TR), harvest path zone (H), and frond stack zone (M). The soil characteristic including microbe abundance, dehydrogenase activity, and PCR-DGGE of microbe community in each treatment were analyzed to reveal the effect of trenching construction. The results showed that trenching implementation reveals major results related to the abundance of microbes and fungi population, supported by the enhancement of dehydrogenase activity at the block with moderate Ganoderma attack. In addition, the DGGE study effectively separates the microbial population of four separate treatment into two clusters, splitting the grouping depending on the Ganoderma level attack. This study shows enhancement of soil characteristics biologically and nutrients status of oil palm leaves especially P, as the results of trenching construction in peatland. Keywords: peatland; oil palm; trenching, DGGE; microbes
Emisi dan potensi pemanasan global gas N2O hasil degradasi serasah mangrove di Pesisir Kabupaten Muna Barat Rahman Rahman; Yusli Wardiatno; Fredinan Yulianda; Frijona Fabiola Lokollo; Iman Rusmana
Jurnal Ilmu Kehutanan Vol 17 No 2 (2023): September
Publisher : Faculty of Forestry Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jik.v17i2.7009

Abstract

Comprehensive research was conducted in the mangrove ecosystem of West Muna Regency to investigate the absorption of greenhouse gas (GHG) and degradation of its litter-produced GHG emissions, including N2O and carbon. The ecosystem consisted of four stations, namely Mangrove Maginti (station I), Mangrove Tiworo Tengah (station II), Mangrove Tiworo Islands (station III), and Mangrove Sawerigadi (Station IV). The research aimed to determine emissions and global warming potential (GWP) of N2O gas resulting from the degradation of mangrove litter. The team used a syringe mounted on the hood to collect gas samples and gas chromatography for concentration analysis. The correlation of emissions to environmental variables was analyzed using the Pearson correlation method. The results showed that all species' most significant and smallest average emissions were at stations III and II, with values of 0.0019 mg/m2/hour and 0.0015 mg/m2/hour, respectively. Water temperature showed a weak relationship with N2O emissions, namely r = 0.3511 (p <0.05), while water salinity did not strongly correlate with N2O emissions (r=-0.4471; p<0.05). The average GWP value ranged from 0.3665–0.6314 CO2e mg/m2/hour. Species R. apiculata and B. cylindrica at stations III and II had the largest and smallest GWP values of 0.8392 and 0.1912 CO2e mg/m2/hour, respectively.
Candida Species Distribution of Clinical Specimens in Banda Aceh, Indonesia Suhartono Suhartono; Wilda Mahdani; Aderiana Masthura; Iman Rusmana
Biosaintifika: Journal of Biology & Biology Education Vol 12, No 2 (2020): August 2020
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v12i2.23758

Abstract

Candidiasis has become increasingly widespread in the community alongside with the developing resistance of Candida sp. to some antifungals. A prevalence study in the present research is required to surveil the distribution of Candida-related infections to administrate the appropriate antifungal treatments. The objective of this research was to determine the species distribution of candidiasis with their antifungal susceptibility isolated from clinical specimens at the Zainoel Abidin Hospital (ZAH) Banda Aceh, Indonesia. The clinical specimens were from inpatients and outpatients in the hospital during January to June 2019. The identification of Candida species and antifungal sensitivity assay were conducted by using VITEK® 2 Compact. Of a total of 68 isolates, there were six species of Candida with the highest species prevalence was Candida tropicalis (52.94%). Additionally, the highest prevalence of candidiasis came from urine specimen (54.41%) and mostly from inpatients in the internal medicine unit (54.41%). Candidiasis occurred predominantly in men (58.82%) and during adulthood (55.88%). The antibiogram of Candida sp. shows a high percentage of sensitivity towards some antifungals including fluconazole (100%), voriconazole (100%), caspofungin (100%), micafungin (100%), amphotericin B (99.5%), and flucytosine (100%). From this result, it can be concluded that candidiasis cases in the ZAH Banda Aceh, Indonesia has prevalently occurred with the few antifungal therapies for candidiasis of were still effective empirically and definitively. This is an initial study of Candida prevalence within different clinical samples in Banda Aceh and the study is expected to be a basis for prevention and control of Candida-related infections in the area.
The Effect of Biofertilizer on The Diversity of N2O Reducing Bacteria in Paddy Fields of Sukabumi, Indonesia Alfan Cahyadi; Iman Rusmana; Nisa Rachmania Mubarik
Biosaintifika: Journal of Biology & Biology Education Vol 9, No 3 (2017): December 2017
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v9i3.9796

Abstract

Some of the methanotrophic bacteria and N2O reducing bacteria have been proven to be able to support the plant growth and increase the productivity of paddy. However effect of the methanotrophic and N2O reducing bacteria application as a biofertilizer to indigenous N2O reducing bacteria is still not well known yet. The aim of this study was to analyze the diversity of N2O reducing bacteria in lowland paddy soil based on a nosZ gene. Soil samples were taken from lowland paddy soils in Pelabuhan Ratu Sukabumi, West Java, Indonesia. There were two treatments for the paddy field soil, ie. biofertilizer-treated field 20% fertilizer (50 kg/ha) with the addition of biofertilizer and 100% fertilizer. PCR amplification of nosZ gene was successfully conducted using nosZF and nosZR primer pair. Denaturing Gradient Gel Electrophoresis (DGGE) process was conducted at 150 V for 5.5h. There were three differences nosZ bands were sequenced. The phylogenetic analysis showed that they were close to uncultured bacteria. Microbial diversity in the biofertilizer-treated field was higher than that of in the 100% fertilizer-treated field. The biofertilizer treatment has higher in microbial diversity than that of applied non-biofertilizer paddy fields. This research might have impact in the application of biofertilizers due to the emission of N2O as a green house gas from paddy fields farming activity. The biofertilizer has great potential application in sustainable environmental friendly agriculture systems.
Degradation of Polycyclic Aromatic Hydrocarbon Pyrene by Biosurfactant-Producing Bacteria Gordonia cholesterolivorans AMP 10 Tri Handayani Kurniati; Iman Rusmana; Ani Suryani; Nisa Rachmania Mubarik
Biosaintifika: Journal of Biology & Biology Education Vol 8, No 3 (2016): December 2016
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v8i3.6448

Abstract

Pyrene degradation and biosurfactant activity by a new strain identified as Gordonia cholesterolivorans AMP 10 were studied. The strain grew well and produced effective biosurfactants in the presence of glucose, sucrose, and crude oil. The biosurfactants production was detected by the decreased surface tension of the medium and emulsification activity.  Analysis of microbial growth parameters showed that AMP10 grew best at 50 µg mL-1 pyrene concentration, leading to 96 % degradation of pyrene within 7 days. The result of nested PCR analysis revealed that this isolate possessed the nahAc gene which encodes dioxygenase enzyme for initial degradation of Polycyclic Aromatic Hydrocarbon (PAH). Observation of both tensio-active and emulsifying activities indicated that biosurfactants which produced by AMP 10 when grown on glucose could lower the surface tension of medium from 71.3 mN/m to 24.7 mN/m and formed a stable emulsion in used lubricant oil with an emulsification index (E24) of 74%. According to the results, it is suggested that the bacterial isolates G. cholesterolivorans AMP10 are suitable candidates for bioremediation of PAH-contaminated environments.How to CiteKurniati, T. H.,  Rusmana, I. Suryani, A. Mubarik, N. R. (2016). Degradation of Polycyclic Aromatic Hydrocarbon Pyrene by Biosurfactant-Producing Bacteria Gordonia cholesterolivorans AMP 10. Biosaintifika: Journal of Biology Biology Education, 8(3), 336-343. 
Harvesting Bioelectricity from Microbial Fuel Cells (MFCs) Powered by Electroactive Microbes Yohanna Anisa Indriyani; Iman Rusmana; Syaiful Anwar; Gunawan Djajakirana; Dwi Andreas Santosa
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 12, No 3 (2023): September 2023
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v12i3.583-596

Abstract

The application of microbial fuel cells is still facing some challenges due to its low power output and high internal resistance. It is desirable to obtain a stable and consistent power output from an MFC to support practical real-world applications. Five electroactive bacteria (isolate LGf1, LGf11, LGf15, LGf20, and LGf22) isolated from the sediment of Waduk Saguling were exploited as the potential anodic biocatalyst for MFC, and the performance of these MFCs were studied in terms of voltage generation (open and close circuit), power density and the losses (polarization technique), and efficiencies (coulombic and energy). MFC biocatalyst by isolate LGf11 performed the best electrochemical performances, including highest OCV (open circuit voltage) value (804 mV) and power output (0.043 W/m2), lowest ohmic resistance (475 Ω), and highest coulombic efficiency (75.79%) and energy efficiency (88.36%) among all anodic biocatalysts. Nevertheless, all the five isolates were potential to be exploited as active biocatalyst for MFC due to their high OCV values and the stability of voltage generations, both in open circuit and close circuit mode. The development of system configuration and the use of more suitable substrate for different electroactive microbes in order to harvest more power output was recommended for further study. Utilization of these potential microbes for other applications in MFC (such as wastewater treatment etc.) was also suggested for further research. Keywords: Bio-electrochemical system, Biofuel, Efficiency, Electro-microbiology, Power output
Insilico analysis of adenylation and ketosynthase domain related to antifungal activity of rice phyllosphere bacteria Wiraswati, Sri Martina; Rusmana, Iman; Nawangsih, Abdjad Asih; Wahyudi, Aris Tri
Biogenesis: Jurnal Ilmiah Biologi Vol 11 No 2 (2023)
Publisher : Department of Biology, Faculty of Sci and Tech, Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/bio.v11i2.39872

Abstract

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Bacterial and Fungal Communities in Tempeh as Reveal by Amplified Ribosomal Intergenic Sequence Analysis SEUMAHU, CECILIA ANNA; SUWANTO, ANTONIUS; RUSMANA, IMAN; SOLIHIN, DEDY DURYADI
HAYATI Journal of Biosciences Vol. 20 No. 2 (2013): June 2013
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (142.073 KB) | DOI: 10.4308/hjb.20.2.65

Abstract

Tempeh is an Indonesian traditional fermented food produced using Rhizopus as a starter culture. In practice, however, the starter culture as well as fermentation processes would yield a polymicrobial fermentation, which generated a unique tempeh flavor and texture. This condition makes Indonesian tempeh as one of the most complex fermented food, while at the same time would make it difficult to scale up tempeh production with uniform quality and consistency. The aim of this study was to compare a number of tempeh microbial communities employing Amplified Ribosomal Intergenic Sequence Analysis (ARISA). Fresh tempeh samples were obtained from tempeh producers in Java and Moluccas. 16S rRNA gene libraries and DNA sequencing were employed to analyze further the nature of bacterial diversity in two selected tempeh samples. The results of our study showed that different tempeh producer possessed different Bacterial ARISA (BARISA) or fungi ARISA (FARISA) profiles.  However, BARISA profiles were found to be more discriminative than FARISA, and therefore BARISA would be more useful for tempeh genetic fingerprint or barcoding.
The Potential of Clove Rhizospheric Bacteria to Produce Vanillin from Eugenol Nurfahmi, Riziq Ilham; Mubarik, Nisa Rachmania; Rusmana, Iman; Tambunan, Ika Roostika; Akhdiya, Alina
HAYATI Journal of Biosciences Vol. 31 No. 4 (2024): July 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.4.702-711

Abstract

Vanillin is one of the most important flavoring agents worldwide. Currently, consumers' awareness and concern for biovanillin production has been increasing. This study aimed to screen the potential of clove rhizospheric bacteria isolates producing vanillin through a biotransformation process of eugenol and to conduct the preliminary optimization of the biotransformation condition. Twenty-eight bacteria isolates were screened for their capability to transform eugenol into vanillin. BKL 15 isolate, which was identified as Lysinibacillus xylanilyticus, was selected as the highest vanillin producer among the isolates. The optimum molar yield of vanillin produced by the selected isolate was 4.99% (1.11 g/L) after 168 hours of biotransformation process in the medium consisting of TSB (30 g/L), eugenol (24 g/L), yeast extract (20 g/L), and concentration of casamino acid (20 g/L). Throughout the publications we have read, this is the first report of L. xylanolyticus that produces vanillin.
Denitrifier Still Has the Important Role in Nitrate Reduction to N2 Although It is Not the Predominant Population in the Estuarine Bacterial Community of Nitrate Reducing Bacteria Rusmana, Iman; Nedwell, David B.
HAYATI Journal of Biosciences Vol. 31 No. 4 (2024): July 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.4.630-640

Abstract

Denitrification and nitrate-ammonification are the responsible processes for nitrate removal in the estuaries. Temperature, nitrate and organic carbon availability are key factors controlling a rate of the nitrate reduction processes. This mixed cultures chemostat study investigates the competition ability and their nitrate reduction end-products of the bacteria isolated from an estuary at different temperatures. This study will help us to understand the seasonal nitrate reduction processes in an estuary. The experiments showed that a nitrate-ammonifier was the predominant process in the steady-state chemostat at high temperature. While a facultative denitrifier-nitrate ammonifier was the predominant process at low temperature. However, the main end products of nitrate reduction at high temperature were up to 61% N2 indicating a denitrifier still had an important role in the end products of nitrate reduction in the estuary. The data also showed that a nitrite respiring bacterium reduced nitrite to N2, that responsible for approximately 6-9% of total N2 produced in the culture. This study confirmed that nitrate ammonifiers out-compete denitrifiers at high temperature, however, denitrifiers still had an important role in end products of nitrate reduction.
Co-Authors Abdjad Asih Nawangsih ACENG RUYANI Achmad Dinoto Aderiana Masthura AKHADIYA, ALINA Alfan Cahyadi Alfisah, Rizal Khoirun Aliati Iswantari Alina Akhdiya Alina Akhdiya ALINA AKHDIYA Amanda, Nisa Widya Andi Ernawati Angela Mariana Lusiastuti Angela Mariana Lusiastuti Ani Suryani Ani Suryani Ani Widiyati ANIK KUSMIATUN Anja Meryandini Anja Meryandini Antonius Suwanto Apon Zaenal Mustopa Ari Fina Bintarti Ari Fina Bintarti, Ari Fina Aris Tri Wahyudi Armanisa, Khafifah Baskoro S Wibowo Cahyadi, Alfan Cecep Kusmana CECILIA ANNA SEUMAHU CECILIA ANNA SEUMAHU Ciptadi Achmad YUSUP Daniel Djokosetiyanto Darmono Taniwiryono Desniar - - Dewi Puspaningsih DIAH ISKANDRIATI Dian Hendrayanti Dinamella Wahjuningrum Dondin Sajuthi DWI ANDREAS SANTOSA Dwi Ningsih Susilowati Eddy Supriyono Emei Widiyastuti Fachriyan Hasmi Pasaribu Fachriyan Hasmi Pasaribu Fahmi, Riziq Ilham Nur Faturrahman Faturrahman Ferbiyanto, Andri Fredinan Yulianda Frijona Fabiola Lokollo GALUH WENING PERMATASARI Gunawan Djajakirana Hamim Hamim Happy Widiastuti Hefni Effendi Hessy Novita Hessy Novita I Komang Gede Wiryawan I MADE ARTIKA I Made Samudra Ifa Manzila Ika Roostika Tambunan, Ika Roostika Ika Setianingsih, Ika Indriyani, Yohanna Anisa Irwan Cahyadi It Jamilah KATHARINA JESSICA Khairul Syahputra Kukuh Nirmala Kuntari, Wahyu Budi Lena Novita Lingga, Rahmad Lizawati . Maggy Thenawidjaya Suhartono Maggy Thenawidjaya Suhartono Mahdani, Wilda Mahyarudin, Mahyarudin Manguntungi, Baso Masrukhin Masrukhin Masthura, Aderiana Miftahudin . Mukti Ali MUNTI YUHANA MUTTAQIN, MAFRIKHUL Nedwell, David B. Niken T.M Pratiwi, Niken T.M NISA RACHMANIA MUBARIK Nisa Widya Amanda Novita, Lena Nurhakiki Nurjanah PRIHASTO SETYANTO Prihasto Setyanto Priyo Handoyo Wicaksono Rahman Rahman Rahman Rahman Rahminovita Herlis RATNA SETYANINGSIH RATNA SETYANINGSIH RATNANINGTYAS, SUSI RIDWAN AFFANDI Rika Indri Astuti RIKA RAFFIUDIN Rina Hesti Utami Risky Hadi Wibowo Risky Hadi wibowo Roedhy Poerwanto Rosadela, Fitri Sipriyadi Sipriyadi Sipriyadi Siti Nur Jannah Sobir Sobir Solly Aryza Sri Budiarti Poerwanto sri murtini . Suhartono Suhartono SUSAN SOKA Syaiful Anwar T. Widiyanto Taruna D. Satwika TARUNI SRI PRAWAST MIEN KAOMINI ANY ARYANI DEDY DURYADI SOLIHIN Thenawidjaya, Maggy Tri Eko WAHYONO Tri Handayani Kurniati Tri Handayani Kurniati Tri Muji Ermayanti Tri P. Priyatno Tri Panji Tri Puji Priyatno Tri Widiyanto Tridesianti, Siska Tuasalamony, Mutia Musdalifah Utut Widyastuti Wahyuni, Reza Wibowo, Risky Hadi WIDANARNI WIDANARNI Widiyanto, Tri Wilda Mahdani Wildan Nurusallam Wiraswati, Sri Martina Yadi Suryadi Yani Aryati Yohana A Dahliani Yohanna Anisa Indriyani Yuli Siti Fatma Yuli Siti Fatma YULIN LESTARI Yuni Puji Hastuti Yusli Wardiatno Zaenal Arifin, Sukarya Zulfarina Zulfarina Zulfarina,