Articles

PENGGUNAAN XILANASE STREPTOMYCES SP. 45 I-3 AMOBIL UNTUK HIDROLISIS XILAN TONGKOL JAGUNG [IMMOBILIZATION OF EXTRACELLULAR XYLANASE FROM STREPTOMYCES SP. 45 I-3 FOR HYDROLYSIS OF CORNCOB XYLAN ] Sunarti, Titi Candra; Mutia, Ferry; Gusmawati, Niken Financia; Lestari, Yulin; Meryandini, Anja
Jurnal Teknologi dan Industri Pangan Vol. 20 No. 1 (2009): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

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Abstract

Xylan extraction from corncob is done by using alkaline as solvent. Xylan extraction from corncob could give the yields as 10.9%. One percent of corncob xylan is used as substrate to produce the xylanase, compared to oatspelt xylan. Immobilization of xylanase was performed using 1% EudragitTM S100 solution (w/v), with 5:1 volume ratio of xylanase and 1 % EudragitTM S100 (w/v). Activity of the immobilized xylanase was decreased to 23.97% compared with free xylanase. Immobilized xylanase have optimum pH and temperature at 6.0 and 40°C  respectively, have also thermal stability at 30?40°C for an hour. Immobilized xylanase could be reused, but its activity decreased to 52.38% after 3 times application.
CHARACTERIZATION OF XYLANASE ACTIVITY PRODUCED BY PAENIBACILLUS SP. XJ18 FROM TNBD JAMBI, INDONESIA KURRATAA?YUN, .; YOPI, .; MERYANDINI, ANJA
HAYATI Journal of Biosciences Vol. 22 No. 1 (2015): January 2015
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1681.551 KB) | DOI: 10.4308/hjb.22.1.20

Abstract

Lignocellulose waste in nature is increasing due to the increasing activity of agroforestry. Up to 40% of lignocellulose biomass are consisted of xylan. Xylan complete breakdown requires the action of xylanase. Xylanase has been used to breakdown xylan into commercial product such as low calories sugar, prebiotic, and biofuel. Due to its wide application, several variation of xylanase characterization are needed. Our previous studies have collected Paenibacillus sp. XJ18 from TNBD forest, Jambi, Indonesia, to gain a unique enzyme characteristic. In this study the characteristic of crude xylanase from Paenibacillus sp. XJ18 was investigated. The highest activity of xylanase production was at 36 h. The xylanase showed activity in a broad range of pH (4.5-9.0). The highest activity showed at pH 5.0, 90 oC. Crude enzyme extract was unstable and had halftime at its pH and optimum temperature about 67 min. The xylanase activity was increased about 4.59 times after being concentrated by 70% acetone  (2.4578 U/mL). Based on TLC result, xylanase from Paenibacillus sp. XJ18 was predicted to produce xylobiose exclusively from extracted corncob xylan.
PENAMBAHAN BAKTERI ASAM LAKTAT TERENKAPSULASI UNTUK MENEKAN PERTUMBUHAN BAKTERI PATOGEN PADA PROSES PRODUKSI TAPIOKA Rembulan, Glisina Dwinoor; Sunarti, Titi Candra; Meryandini, Anja
Jurnal Teknologi dan Industri Pangan Vol. 26 No. 1 (2015): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (368.973 KB) | DOI: 10.6066/jtip.2015.26.1.34

Abstract

Lactic acid bacteria (LAB) produce organic acids and active compounds which can inhibit the growth of pathogenic bacteria. Lactic acid bacteria potentially can be introduced to inhibit pathogenic bacteria in the tapioca production at the extraction stage, especially during the settling process since there is possibility of starch slurry to be contaminated by pathogenic bacteria from water. The objectives of this research were to design a solid starter of LAB through encapsulation by using modified starch includes sour cassava starch, lintnerized cassava starch and nanocrystalline starch, utilize the starter for suppressing the growth of pathogenic bacteria in the production process of tapioca and characterize the functional properties of tapioca. The encapsulation of lactic acid bacteria was conducted by freeze drying at a temperature of -50°C for 48 hours. The viability of LAB after freeze drying with sour cassava starch matrix was 92% of the liquid starter, with lintnerized cassava starch matrix was 93%, while that with nanocrystalline matrix was 96%. After application of the LAB culture during settling process for tapioca extraction and the tapioca was stored at room temperature for 6 months, it was shown that E. coli, Salmonella and Shigella were  detected in the native tapioca starch (without treatment) while the starch added with lactic acid bacteria starter was not absent for the pathogenic bacteria. The addition of lactic acid bacteria in extraction process can suppress the growth of pathogenic bacteria in tapioca. The results showed that lintnerized cassava starch matrix is the best matrix because after 6 months it still contained lactic acid bacteria as compared to liquid starter and that encapsulated with other matrixes.
PRODUCTION AND CHARACTERISTICS OF YEAST DEXTRANASE FROM SOIL Hijah, Vestika Iskawati Wahidul; Sunarti, Titi Candra; Meryandini, Anja
HAYATI Journal of Biosciences Vol. 26 No. 1 (2019): January 2019
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (543.647 KB) | DOI: 10.4308/hjb.26.1.26

Abstract

  The existence of dextran in sugar cane juice is a major problem in the sugar industry, causing substantial losses. Treatment of dextran through enzymatic hydrolysis using dextranase is highly recommended as the most suitable method at this time because this is more effective and more economical. This study investigated the production and characterization of dextranase from local isolate yeast to degrade dextran on sugar cane juice. The selected yeast was identified on the basis of molecular identification. Dextranase was produced from the culture with the best carbon and nitrogen sources then was characterized. Application of enzyme was also evaluated. As a selected isolate, F4 had the closest relationship with Pichia kudriavzevii. The highest production of dextranase was induced by the supplementation of glucose and combination of yeast extract and peptone. The enzyme had optimum working condition at pH 7, temperature at 30°C and it is more stable at 4°C of storage temperature. The cation Na+ played key role as co-factor while K+ and Ca2+ were detected as inhibitor of the enzyme. Dextranase from F4 isolate can hydrolyze dextran both in pure and in mixed dextran substrate, but with a lower hydrolysis rate.
SELECTION OF LACTIC ACID BACTERIA AS PROBIOTIC CANDIDATE FOR CHICKEN Hamida, Fathin; Wiryawan, Komang G; Meryandini, Anja
Media Peternakan Vol. 38 No. 2 (2015): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (550.879 KB) | DOI: 10.5398/medpet.2015.38.2.138

Abstract

Lactic acid bacteria (LAB) regarded as safe microorganisms; they can naturally live in gastrointestinal tract, so appropriately used as a probiotic for chicken. This study aimed to select six isolates of LAB (E1223, E3, E4, E5, E7, and E8) to obtain the isolates potentially as probiotic candidate for chicken. The six isolates were derived from spontaneous fermented corn obtained from Laboratory of Animal Biotechnology and Biomedical, PPSHB, Bogor Agricultural University, Indonesia. LAB isolates were tested their susceptibility to antibiotics (bambermycin, erythromycin, chloramphenicol, and tetracycline) then were examined in vitro for their tolerance to gastrointestinal pH (2, 3, 4, and 7.2) and 0.5% bile salt condition, antimicrobial activity against Salmonella enteritidis and Enterococcus casseliflavus, and ability to adhere to chicken ileal cells. The results showed the isolates E5, E7, and E8 were sensitive to tetracycline and chloramphenicol, they could survive at pH 2, 3, 4, and 7.2, could survive at 0.5% bile salts, produced antimicrobial activity, and able to adhere to ileal cells (9.40±0.00 Log CFU/cm2 of E8) and were significantly (P<0.05) higher than those of control (5.30±0.14 Log CFU/cm2). In conclusion, this study showed that isolate E8 had better potential compared to isolates E5 and E7 in most in vitro assays as a probiotic candidate for chicken. E5, E7, and E8 were closely related with Pediococcus pentosaceus based on 16S rRNA gene.Key words: LAB, probiotic, chicken, in vitro
BIOFUNGICIDE PRODUCING BACTERIA: AN IN VITRO INHIBITOR OF GANODERMA BONINENSE Irma, Ade; Meryandini, Anja; Rupaedah, Bedah
HAYATI Journal of Biosciences Vol. 25 No. 4 (2018): October 2018
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (499.654 KB) | DOI: 10.4308/hjb.25.4.151

Abstract

Oil palm is widely known as one of vegetable oil sources and the main comodity in Indonesian agriculture because of the benefits in non-food and food industries. Ganoderma boninense attack results in considerable losses to agriculture. Chemical control creates a harmful effect on health and the environment. Biocontrol is required to take over the function of chemical control. This study aimed to select bacteria that produce bioactive compounds as biofungicide against G. boninense pathogenic fungi and identify bacteria producing biofungicide using molecular method. The stages of bacterial isolate selection were performed through the selected hemolysis and isolate tests in the antagonistic test. Bacteria were extracted using ethyl acetate and their extract activity were tested. Analysis of bioactive compounds was conducted using thin layer chromatography (TLC) and the identification was based on 16S rRNA gene. The result of bacterial pathogenic test was obtained from two selected bacterial isolates namely 11B LB and 11B MD. Both bacterial isolates showed antagonistic effects by forming an inhibitory zone against G. boninense growth with percentage of inhibitor of 81 and 75%. Activity test of bacterial extract showed that crude extract of bacterial isolate 11B MD had the highest inhibitor activity that is 88.34%. TLC analysis proved that the active extract of bacteria containing metabolite compounds had Rf value of 0.1, 0.28, and 0.38. Isolate bacteria 11B MD was identified as Pseudomonas aeruginosa.
BACTERIAL COMMUNITIES IN AQUATIC SEDIMENT FROM BUKIT DUABELAS RAINTFOREST AND OIL PALM PLANTATION AT SUMATRA INDONESIA Wijayanti, Marini; Wahyudi, Aris Tri; Yuhana, Munti; Engelhaupt, Martin; Meryandini, Anja
HAYATI Journal of Biosciences Vol. 25 No. 2 (2018): April 2018
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1289.48 KB) | DOI: 10.4308/hjb.25.2.85

Abstract

The diversity of bacterial communities in aquatic sediment of rainforest and oil palm plantation at Sumatra was studied using pyrosequencing of 16S rRNA gene and common biodiversity indices.  Phylogenetic approach was used for revealing the community shift of bacterial phyla and genera in both areas.  Ecological approach used soil pH, total Carbon (TC), total Nitrogen (TN), available Phosphorus (AP) measurement and bacterial diversity with Shanon and Simpson indices, and bacterial richness with Chao1-ACE indices and OTUs.  Bacterial diversity and richness in aquatic sediment of forest area was higher than that ones in oil palm plantation area, although their pH, TC, and TN in both areas were not different significantly. The majority of sequences related to Proteobacteria (34.85%), Acidobacteria (32.67%), Nitrospirae (6.86%), Chloroflexi (4.31%), and Actinobacteria (4.02%) were from forest; whereas those related to Acidobacteria (46.10%), Proteobacteria (25.86%), Nitrospirae (9.20%), Chloroflexi (4.99%), and Actinobacteria (2.34%) invented from oil palm plantation. The genera of Alphaproteobacteria and Betaproteobacteria dominated in genera phylotype of bacterial 16S rRNA phylogenetic revealed both aquatic sediment of forest and oil palm plantation. The most genera in the phylogenetic tree from aquatic sediment of both areas was Burkholderia.  The bacterial community shift in aquatic sediment of forest transformation indicated higher bacterial diversity index, richness index, some of phyla and genera in aquatic sediment from forest than from oil palm plantation.
PURIFIKASI DAN KARAKTERISASI ENZIM PEKTINASE DARI ASPERGILLUS USTUS BL5 Yopi, Yopi; Rahmani, Nanik; Andriani, Ade; Dewi, Fitria; Meryandini, Anja
BERITA BIOLOGI Vol 12, No 3 (2013)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v12i3.646

Abstract

Pectinase is an enzyme that could hydrolyze pectin into galacturonic acid. Natural pectinase was produced by microbes such as bacteria, yeast, fungi and Actinomycetes. Application of pectinase in industry were mainly in juice industry, textile, pulp, tea, cocoa and coffee fermentation. In this research, we conducted purification and characterization of pectinase produced by Aspergillus ustus BL5 in submerged fermentation using commercial pectin. The result showed that the optimum of pectinase production was reached at 120 hours fermentation process with specific activity 0.59 U/mg. The crude extract of pectinase was then concentrated using PEG 6000 and purified by Sephadex G-75 gel filtration chromatography. There were 2 fractions contained pectinase which the activity was 4.15 U/mg (pectinase A) and 3.3 U/mg (pectinase B), respectively. Compare to crude extract, the yield product of pectinase A and B increased 6.94 and 5.53 times, respectively. The purified pectinase A have optimum temperature at 50 oC and optimun pH at 5.
KARAKTERISTIK ISOLAT BAKTERI PENGHASIL DEKSTRAN DARI BATANG TEBU (SACCHARUM OFFICINARUM L.) Akram, Sitti Rahbiah; Sunarti, Titi Candra; Meryandini, Anja
Jurnal Ilmu Pertanian Indonesia Vol. 24 No. 2 (2019): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.871 KB) | DOI: 10.18343/jipi.24.2.160

Abstract

Dextran is a long chain of carbohydrate polymers synthesized by dextransucrase enzyme with sucrose as a substrate. The physical, chemical conditions, temperature, and the concentration of sucrose in the isolate bacterial growth media play an important role in dextransucrase production. This study aims to isolate and characterize the dextransucrase producing bacteria. The bacteria were isolated from sugar cane. TBT 3.2 Isolate which had the highest viscosity (1.48 cP) and crude dextran (7.87 g/L) production was selected. TBT 3.2 Isolate was identified as Paenibacillus polymyxa with 99% similar identity. The Paenibacillus polymyxa TBT 3.2 was characterized based on their ability to produce dextran and cell number. The bacteria had the optimum growth conditions on the media for producing dextran at pH 7, temperature 30°C, and concentration of 20% sucrose. The highest dextransucrase activity and the highest specific activity were obtained after 25 minutes of incubation, with the activities of 29.41 mU/mL and 0.46 U/mg. Based on the results of this study, the Paenibacillus polymyxa TBT 3.2 can be used as a dextran producing bacteria.
ENZYMATIC HYDROLYSIS OF PORANG BY STREPTOMYCES VIOLASCENS BF 3.10 MANNANASE FOR THE PRODUCTION OF MANNOOLIGOSACCHARIDES Safitri, Azizah Hikma; Meryandini, Anja; -, Yopi
Media Peternakan Vol. 37 No. 3 (2014): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (846.166 KB) | DOI: 10.5398/medpet.2014.37.3.190

Abstract

Porang (Amorphophallus muelleri Blume) is an indigenous Indonesian plant containing high hemicellulose as a source of glucomannan. An alternative way to produce a good quality of mannooligosaccharides was through hydrolysis of glucomannan by endo-? mannnase from actynomicetes. Based on 16S rRNA analysis, BF 3.10 isolate, isolated from Bukit Duabelas National Park soil, Jambi was identified as Streptomyces violascens BF 3.10. Reducing sugar was analyzed by dinitrosalicylic acid methods. The highest reducing sugar was achieved at the 72 hours of incubation. Mannanase of isolate BF 3.10 had the highest activity at pH 6 and temperature of 70 °C with enzyme activity of 16.38 U/mL and was stable at 4 °C for 48 h. During 5-hour of hydrolysis with substrate concentration of 0.25%, 0.5%, and 1% porang glucomannan dissolved in 10 mL enzyme, mannooligosaccharides were produced with the degree of polymerization of 2-3. Visualization of the products by using thin layer chromatography (TLC) and high performance liquid chromatography (HPLC) methods showed that mannooligosaccharides produced comprised of glucose, mannobiose, mannotriose, and mannotetraose. The degree of polymerization and the simple sugars produced indicated that mannanase produced by S. violascens actively catalyzed the hydrolysis of 1.4-?-D-mannoside linkage from ?-1.4-mannan backbone, that eventually produced simple sugars of mannooligosaccharides.Key words: glucomannan, mannanase, mannooligosaccharides, porang, Streptomyces violascens