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Microbiology Indonesia
Published by Perhimpunan Mikrobiologi Indonesia
ISSN : 19783477     EISSN : 20878575     DOI : -
Core Subject : Health, Science,
Biochemistry, Genetics & Molecular Biology Immunology & microbiology Medicine & Pharmacology
Microbiology Indonesia provides a unique venue for publishing original researches in microbiology (espesially from Indonesian reseachers), and ensures that authors could reach the widest possible audience. Microbiology Indonesia publishes a wide range of research disciplines on bacteria, archaea, fungi, protozoa, and virus as well as biotechnology related to microbiology. Topics include (but are not limited to): -methods in microbiology, -bioprocess, -environmental microbiology, -food microbiology, -plant-microbe interaction, -animal-microbe interactions, -microbial community, -microbial genetics, -virology, -comparative and functional microbial genomics, -and gene expression in microbes.
Arjuna Subject : Imunologi dan Mikrobiologi (semua kategori) - Mikrobiologi dan Bioteknologi Terapan
Articles 5 Documents
 1 
Search results for , issue "Vol. 15 No. 1 (2021): March 2021" : 5 Documents clear
Exploration of lignocellulolytic microbes in oil palm rhizosphere on peat soils and their respiration activities Happy Widiastuti; Siswanto; Saeful Anwar; Supiandi Sabiham; Husni Mubarok; Darmono Taniwiryono; Basuki Sumawinata; Heru B. Pulunggono
Microbiology Indonesia Vol. 15 No. 1 (2021): March 2021
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (798.494 KB) | DOI: 10.5454/mi.15.1.5

Abstract

Microbial respiration in peatlands plays a role in contributing CO2 emissions. Studies of microbial exploration and respiration on peat soils in oil palm plantations have not been widely reported. This study aims to explore lignocellulolytic microbes found in peat soils in compared with mineral soils planted with 12-year-old oil palm. Exploration is done by growing the samples on the specific medium of each group of microbial functions. In the next stage, the culture obtained was analysed the respiration activity based on the oxidation of peroxidase catalysis using a chromogen substrate (tetramethylbenzidine) and measured using spectrophotometry at a wavelength of 450 nm. The results showed that both in mineral and peat planted with oil palm in a depths of 0-20 cm were found lignolytic fungi with a population of 17 x 102. Similar results were also found in peat with fern vegetation but at a depth of 20-40 cm. Lignolytic bacteria (methylene blue degradation) can be found on peat soils planted with oil palm at a depth of 0-60 cm and the population increases with increasing depth. This bacterium is also found on peat soils with fern vegetation and mineral soils planted with palm. At a depth of 0-20 cm the population of lignolytic bacteria in non-oil palm peat is highest. Cellulolytic bacteria were isolated at a depth of 0-60 cm. Cellulolytic bacterial populations were highest in oil palm peat at all depths compared to other samples. Respiration analysis of several dominant isolates showed fairly high variation between microbial function groups and within the same function group. The lignolytic microbial group degrading methylene blue showed high respiration activity and varies greatly (0.19-1.85 MER). While the respiration activity of cellulolytic bacteria ranged from 0.45 to 0.62 MER.
Identification of Dermatophyte Fungi Causing Tinea Pedis And Tinea Unguium In Malabero Coastal Communities, Bengkulu Mardhatillah Sariyanti; Putri Maya AGustria; Willujeng Fanny Herlambang
Microbiology Indonesia Vol. 15 No. 1 (2021): March 2021
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (646.497 KB) | DOI: 10.5454/mi.15.1.4

Abstract

Dermatophytosis cases have increased significantly in various countries, more than 20-25% of the population were infected by superficial fungal infections. Malabero urban village is a coastal area in Bengkulu city with high temperature and humidity. The daily activities of residents in the area are mostly fishermen, so they are in a watery or wet environment for approximately 12 hours every day. So, this research aimed to identify dermatophyte fungi that caused tinea pedis and tinea unguium from these coastal communities. The diagnosis of tinea was based on symptoms and physical examination of the lesion area. Furthermore, specimen collection was carried out by scraping the lesion area, then examined with 20% KOH and fungal culture on sabouraud dextrose agar media. Subjects included 79 people who had symptoms of tinea pedis and 33 people with symptoms of tinea unguium. The results of dermatophyte fungi identification were obtained, Trichophyton mentagrophytes, Trichophyton rubrum, Trichophyton tonsurans, and Aspergillus sp. Our conclusion is the most identified dermatophyte species is Trichophyton mentagrophytes. Keywords: Coastal, dermatophyte, tinea pedis, tinea unguium
Thermostable alkaline protease activity from Aspergillus flavus DUCC- K225 and its compatibility to local detergents A N S Rini; Isworo Rukmini; S Pujiyanto
Microbiology Indonesia Vol. 15 No. 1 (2021): March 2021
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (600.09 KB) | DOI: 10.5454/mi.15.1.3

Abstract

Protease is the most important enzyme in many industries, including detergent. Aspergillus flavus DUCC-K225 is a thermotolerant indigenous molds isolated from Madura island which is potential in producing thermostable alkaline protease enzymes. The enzyme produced by submerged culture on modified Czapeks Dox liquid medium containing glucose as carbon source and 1% of casein. The aims of this study were to determine the activity and stability of thermostable alkaline protease produced by A. flavus DUCC-K225 at various temperatures, also the compatibility to 5 local detergents. Research were done using CRD, with temperature variation for protease activity as treatment. The results showed that the optimum activity of thermostable alkaline proteases was 214.503 U/mL, with retained activities up to 78% in 60 minutes at 55°C. The alkaline thermostable protease compatible with 5 local detergents tested, with the retained activity varied 55.8%-95.22% at 29oC and 62.36%-97.7% at 55oC. The compatibility to detergent confirmed by blood stained cleansed. The higher the protease activity, the higher the blood stain solubility. Key words: Alkaline protease, thermostable, A. flavus DUCC-K225, compatibility, detergent
Molecular Diversity of Mold Associated with Gatotan Steffanus Pranoto Hallis; Anastasia Tatik Hartanti; Agustin Wydia Gunawan
Microbiology Indonesia Vol. 15 No. 1 (2021): March 2021
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.373 KB) | DOI: 10.5454/mi.15.1.1

Abstract

Gatotan is a raw material to make gatot, an Indonesian fermented food, especially in Central Java, made from cassava tubers. Traditionally, the cassava tubers are sun-dried for several days until the black color appears. However, natural fermentation allowed by many types of microorganisms, especially mold in this process could raise concerns about the food safety issues. Previously, the identifications of molds in gatotan were based on morphological observation. Here, we reported the diversity of molds associated with gatotan using molecular identification method. The molecular identification was based on ribosomal DNA internal transcribed spacer (ITS) amplification sequences using combination of ITS4 and ITS5 primers. A total of ten molds were isolated and phylogenetic trees were constructed based on ribosomal DNA sequences. Our results showed that the molds were classified into Lasiodiplodia spp., Trichoderma sp., Aspergillus nomius, Fusarium oxysporum, and Cladosporium sphaerospermum.
EPS7-like Enterobacteria phage Isolated from Indonesia Akhirta Atikana; Katsutoshi Fujita; Alex Prima; Yopi; Hiroko Kawasaki; Ken-Ichiro Suzuki; Puspita Lisdiyanti
Microbiology Indonesia Vol. 15 No. 1 (2021): March 2021
Publisher : Indonesian Society for microbiology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (571.602 KB) | DOI: 10.5454/mi.15.1.2

Abstract

Bacteriophages are the most abundant entities in earth. The order Caudovirales is the largest and most widespread group among bacterial viruses. The purpose of this study is to characterize bacteriophages from Indonesian environment. During this experiment, we collected sample from Kuningan (West Java) and Buleleng (Bali), Indonesia. We used an overlay agar method with three strains of E. coli as a host (NBRC 13965, NBRC 12713 and NBRC 13168) combined with digestion profiling using three restriction enzymes (PvuII, EcoRV and HincII) and transmission electron microscope (TEM) to characterize the morphology of the phage from Indonesia. Our results showed that phage LIPI13-Bp006 is in a group of Caudovirales and highly similar to Enterobacteria phage EPS7.

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