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INDONESIA
Indonesian Journal of Biotechnology
Published by Universitas Gadjah Mada
ISSN : 08538654     EISSN : 20892241     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology Immunology & microbiology Materials Science & Nanotechnology
The Indonesian Journal of Biotechnology (IJBiotech) is an open access, peer-reviewed, multidisciplinary journal dedicated to the publication of novel research in all aspects of biotechnology, with particular attention paid to the exploration and development of natural products derived from tropical—and especially Indonesian—biodiversity. IJBiotech is published biannually and accepts original research articles featuring well-designed studies with clearly analyzed and logically interpreted results. A strong preference is given to research that has the potential to make significant contributions to both the field of biotechnology and society in general.
Arjuna Subject : -
Articles 484 Documents
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Micro - minisatellite marker for Acacia Widyatmoko, AYPC; Shiraishi, Susumu
Indonesian Journal of Biotechnology Vol 19, No 1 (2014)
Publisher : Universitas Gadjah Mada

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Abstract

Indonesian Journal of Biotechnology.
Buah Merah Astuti, Endang
Indonesian Journal of Biotechnology Vol 19, No 1 (2014)
Publisher : Universitas Gadjah Mada

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Abstract

Indonesian Journal of Biotechnology
Succession of Actinomycetes During Composting Proccess of Dairy-Farm Waste Investigated by Culture-Dependent and Independent Approaches Faatih1, Mukhlissul; Widada, Jaka; N, Ngadiman
Indonesian Journal of Biotechnology Vol 13, No 2 (2008)
Publisher : Universitas Gadjah Mada

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Abstract

Mesophilic, thermophilic, and maturation phases were recognized in composting proccess. Temperaturechanges influence the microbial communities in compost within composting proccess. Actinomycetes account for alarger part of compost microbial population. The aim of this research was to study succession of actinomycetescommunity during composting of dairy-farm waste investigated by culture-dependent and independentapproaches.In culture-independent method, the succession of actinomycetes community was analyzed by nestedpolymerasechain reaction of ribosomal intergenic spacer (nested-PCR RISA) using spesific primer F243 and primerR23S followed by a second PCR using primers F968 and R23S. In culture-dependent method actinomycetes fromcompost were isolated on selective media, starch-nitrate medium and humic-acid + vitamins medium. DNA ofactinomycetes was extracted and amplified by repetitive sequence-based PCR (rep-PCR) using primer BOXA1R. Thebanding patterns were used to generate dendrograms by UPGMA clustering with NTSYS program. Microcosmcontaining sterile rice-straw and water which is inoculated with each actinomycetes isolates was used for examiningthe ability of each isolate in rice-straw degradation.The experiment results showed that succession of both bacteria and actinomycetes was occured withincomposting proccess of dairy-farm waste. Analysed by culture-independent method revealed that the highestcommunity of compost’s bacteria was on mesophilic, thermophilic, and maturation phases, respectively. WhereasPCR-nested RISA resulted the highest population of actinomycetes was on thermophilic, maturation, and mesophilicphases, respectively. By culture-dependent method was obtained 29 actinomycetes isolates from mesophilic phase,23 isolates from thermophilic phase, and 19 isolates from maturation phase. Genetic diversity analysis of the obtainedisolates showed the presence of phylogenetic grouping on each phase of composting proccess. This result illustratedthe occurance of succession of actinomycetes community in compost. The ability of each isolates in rice-strawdegradation was different, and SnT9 isolate was found to be a promising rice-straw degrader.Keywords: succession, actinomycetes, composting, nested-PCR RISA, rep-PCR
Microorganisms Associated with Volatile Organic Compound Production in Spoilt Mango Fruits Ibrahim, Aliyu D.; Oyeleke, Bankole S.; Muhammad, Ummul Khaltum; Aliero, Adamu Aliyu; Yakubu, Sabo E.; Safiyanu, Hadiza M.
Indonesian Journal of Biotechnology Vol 16, No 1 (2011)
Publisher : Universitas Gadjah Mada

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Abstract

Microorganisms associated with the production of volatile compound in spoilt mango fruits sold in Sokoto town were isolated and identified. The organisms include seven species of bacteria and a species of yeast. These include Bacillus pumilus, Bacillus firmus, Brevibacillus laterosporus, Morganella morganii, Paenibacillus alvei, Staphylococcus saccharolyticus, Listeria monocytogenes and Candida krusei respectively. GC-MS analysis revealed the presence of eleven and sixteen volatile organic compound in the healthy and spoilt ripe mango fruits. Octadecanoic acid, oleic acid, 1 – Butanol, 3 – methyl-, carbonate (2:1) and 3,7 – Dimethyl nonane were common to both healthy and spoilt fruits with the first three having higher concentration in healthy fruits than spoilt while the later had higher concentration in the spoilt. One methyl group of 3,3- Dimethyl hexane in healthy fruit was shifted to position two to yield 2,3-Dimethyl hexane in the spoilt fruits. 2,2-Dimethylbutane, Methyl(methyl-4-deoxy-2,3-di-O-methyl.beta.1-threo-hex-4-enopyranosid) urinate, 3-(4-amino-phenyl)-2-(toluene-4-sulfonylamino)-propionic acid, 2-Methyl-3-heptanone, 3,5-Nonadien-7-yn-2-ol, (E,E), Butanoic acid, 1,1-dimethylethyl ester, 1-methyl-3-beta.phenylethyl-2,4,5-trioxoimidazolidine, Pentanoic acid, 2,2-dimethyl, ethyl ester (Vinyl 2,2-dimethylpentanoate), 4-Methyurazole, 1-Tridecyn- 4 – 9 – ol, 1-Hexyl-1-nitrocyclohexane were unique to spoilt fruits. This study suggests that these unique volatile metabolites could be exploited as biomarkers to discriminate pathogens even when more than one disease is present thereby curbing post harvest loss during storage after further validation and the volatile organic compound could form the basis for constructing a metabolomics database for Nigeria.
Genotyping of Rotavirus by Using RT-PCR Methods Nirwati, Hera; Wibawa, Tri; Aman, Abu Tholib; Soenarto, Yati
Indonesian Journal of Biotechnology Vol 18, No 1 (2013)
Publisher : Universitas Gadjah Mada

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Abstract

There is a great diversity of rotavirus genotypes circulating worldwide, with dominant genotypes changing from year to year. Rotavirus genotyping was performed by using reverse transcription PCR with type-specifi c-primers. Since rotavirus is a RNA virus that has high mutation rate, there was a possibility of technical diffi culty in genotyping due to mutation in the primer binding sites. During Indonesian rotavirus surveillance study 2006-2009, it was reported that 17% of samples subjected for G type and 21% of samplessubjected for P type were untypeable. The objective of this study was to identify genotypes of the samples that were untypeable previously using RT-PCR based on the method described by Das et al. (1994) and Gentsch et al. (1992). There were 30 samples subjected to G type and 61 samples subjected to P type to be re-typed using method described by Gouvea et al. (1990) and Simmond et al. (2008) for G and P typing, respectively. By using another set of primer, the genotype of all samples was identifi ed. This study highlights the importance of a constant reconsideration of primer sequences employed for the molecular typing of rotaviruses.Key words: rotavirus, G typing, P typing
Distribution of Camphor Monooxygenase Genes in Soil Bacteria N, Ngadiman; Suenaga, Hikaru; Goto, Masatoshi; Furukawa, Kensuke
Indonesian Journal of Biotechnology Vol 10, No 2 (2005)
Publisher : Universitas Gadjah Mada

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Abstract

In microbial degradation of camphor, the first step is oxidation by multiunit enzyme, camphormonooxygenase, encoded by cam genes (camA,B,C). Seven camphor-utilizing bacterial strains have been isolatedfrom soil at various locations. CamA,B,C genes of Pseudomonas putida strain PpG1 and strain GF2001 were used asprobes to explore their abundance in the camphor-utilizing bacteria. Southern analysis revealed that all of thecam genes of GF2001 could hybridize well to the SpeI-digested genomic DNA of strains tested, whereas PpG1 camgenes were not. This result suggested that the GF2001 type cam genes are widely distributed among the camphorutilizingstrains in the environment. Thus strain GF2001 and seven newly isolated strains share a commonevolutionary origin.Key words: Camphor monooxygenase genes, gene distribution, sail bacteria.
Comparison of Cytotoxic and Antiproliferative Effects of Benzylidenecyclopentanone Analogues of Curcumin on RBL-2H3 Cells Nugroho, Agung Endro; ., Sardjiman; Maeyama, Kazutaka
Indonesian Journal of Biotechnology Vol 15, No 2 (2010)
Publisher : Universitas Gadjah Mada

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Abstract

Curcumin is a natural yellow pigment isolated from the rhizomes of Curcuma longa L. (turmeric), and has several pharmacological effects and no toxicity in both in animal and human clinical study. However, the problem of curcumin is its stability because of its active methylene moiety. Modification of this moiety to cyclopentanone is expected to increase the stability. Previous study reported that benzylidenecyclopentanone analogues of curcumin showed inhibitory effect on histamine release from RBL-2H3 (rat basophilic leukemia) cells, a tumor analog of mast cells. One of them, the hydroxy-methoxy analog (PGV-0), showed more potent effect than that of curcumin. In the present study, some benzylidenecyclopentanone analogues of curcumin were evaluated for their effects on the viability and proliferation of RBL-2H3 cells. Viable cells were counted under a light microscope with a cells-counting chamber or using the cell viability reagent WST-1. The results showed that mast cell viability and histamine content were not affected by curcumin and benzylidene cyclopentanone for 30 min incubation, however, impaired for overnight incubation. The hydroxy-dimethyl benzylidene analog (PGV-1) strongly decreased the mast cells viability for overnight incubation, and its effect was highest among the other analogues. In the proliferation study, this compound also strongly inhibited the proliferation of mast cells, whereas curcumin and hydroxy-methoxy benzylidene analog inhibited the proliferation slightly. There were no inhibitory effects on mast cells proliferation treated by dibenzylidene; dihydroxybenzylidene; and hydroxy-diethylbenzylidene cyclopentanone.Keywords : viability, proliferation, curcumin, benzylidene cyclopentanone, RBL-2H3 cells
16s rRNA Identification of Pediococcus spp. from Broiler and Studies of Adherence Ability on Immobilized Mucus Damayanti, Ema; Yusiati, Lies Mira; Dinoto, Achmad
Indonesian Journal of Biotechnology Vol 17, No 2 (2012)
Publisher : Universitas Gadjah Mada

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Abstract

The objectives of this research were to study taxonomical status of lactic acid bacteria (LAB) isolated from broiler and adherence ability on mucus in vitro. Molecular analysis was performed by analyzing 16S rRNA gene using universal primer. The adherence assay on mucus was carried out using microplate method with total plate count (TPC), absorbance (A550) and confirmed by scanning electron microscopy (SEM). The results of this studies revealed that three of LAB isolates have closed relation to Pediococcus acidilactici (99.9%) species.Three isolates of P. acidilactici have adherence ability on broiler mucus higher than that on porcine mucin with an adherence percentage of 55.5% versus 50.8% and absorbance A550 of 0.061 versus 0.051, respectively. The highest adherence ability showed by P. acidilactici R02 with adherence percentage was 59.3% and absorbance A550 = 0.068. Adherence on mucus were affected by the addition of 3 g/l of gastric juice and 0.3% (b/v) of bile salt. Adherence analysis using SEM also showed that the adherence on broiler mucus was higher than the adherence on porcine mucin. Altogether this adherence studies, suggest that three isolates of P. acidilactici LAB were capable of colonizing host intestinal mucus in vitro as important property to be promising probiotic bacteria for broiler.Key words : adherence, broiler, Pediococcus, mucus, 16S rRNA
Effect of Culture Medium Supplementation with b-mercaptoethanol and Amino Acid on Canine Intergeneric Embryo Development with Porcine Oocyte Cytoplasm Recipient Fibrianto, Yuda Heru
Indonesian Journal of Biotechnology Vol 12, No 1 (2007)
Publisher : Universitas Gadjah Mada

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Abstract

The present study investigated the effect of culture medium supplementation with mercaptoethanol ( ME)and amino acid (AA) on canine intergeneric embryo development with porcine oocyte cytoplasm. Porcine cumulusoocyte complexes (COCs) were collected from slaughterhouse and matured in TCM-199 supplemented with 26.2mM NaHCO, 3.05 mM glucose, 0.91 mM sodium pyruvate, 0.57 mM L-cysteine, 75 mg/l kanamycin, 10 ng/ml 3epidermal growth factor, equine chorionic gonadotropin (eCG), 10 IU/ml human chorionic gonadotropin (hCG),and 10% (v/v) porcine follicular fluid (pFF) at 39 °C in a humidified atmosphere of 5% CO for 42-44 h and donor cell 2collected from ear skin afghanhound male dog. After somatic cell nuclear transfer (SCNT), embryo developmentwere examined for cleavage rate and 144 hr for final development after cultured in media. The result shows that,amino acid and mercapoethanol addition in culture medium (NCSU-23) have no effect on embryo development.The development rate of embryo until 16 cell stage in NCSU and NCSU supplement are 4.67% and morula stage are3.73% and 4.67%.Key words : intergeneric clone embryo, canine, ( amino acid (AA)
Effects of Light Quality on Vegetative Growth and Flower Initiation in Phalaenopsis Dewi, Kumala; Purwestri, Yekti Asih; Astuti, Yohana Theresia Maria; Natasaputra, Lila; P, Parmi
Indonesian Journal of Biotechnology Vol 19, No 1 (2014)
Publisher : Universitas Gadjah Mada

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Abstract

The effects of LEDs (Light-Emitting Diodes) emitting different colours namely red, blue, red andblue, and white lights on vegetative growth and fl ower initiation of Phalaenopsis have been evaluated.Phalaenopsis“otohine/taisuco fi re bird” seedlings in vitro were subjected to different light qualities for either2 or 4 weeks, and then each seedling was planted in a plastic pot containing sphagnum and grown in thegrowth chamber under similar light quality for 3 months. For fl ower induction, mature Phalaenopsis plantshaving 4 – 6 leaves were grown for 3 months in the growth chamber under different light qualities. The leafspan, chlorophyll, gibberellin and cytokinin content were determined. In addition, the expressions of FT-likegene in the leaf, axillary bud, fl ower bud and stalk were examined.Vegetative growth was enhanced under blue, red-blue or white LEDs compared to that of the control.Gibberellin and cytokinin content increased in the seedlings subjected to white LEDs. Based on the averageof leaf span increment it was suggested that the growth of Phalaenopsis seedlings can be promoted by givingeither blue, red-blue or white LEDs. From the second experiment, it was found that fl ower induction inPhalaenopsis can be obtained in plants that had just fi nished fl owering without the application of LEDs. Theexpression of FT-like gene in the leaf as well as fl ower bud and stalk suggests that this gene is involved infl ower regulation of Phalaenopsis.

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