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OPTIMASI KONDISI FERMENTASI UNTUK PRODUKSI SELULOSA BAKTERI OLEH STRAIN SLK-1 DALAM MEDIA DASAR AIR KELAPA (Optimization Of Fermentation Conditions For The Production Of Bacterial Cellulose By Slk-1 Strain In Coconut Water Based Medium) Sarkono, Sarkono; Moeljopawiro, Sukarti; Setiaji, Bambang; Sembiring, Langkah
Prosiding Seminar Biologi Vol 9, No 1 (2012): Seminar Nasional IX Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

ABSTRAK   Tujuan penelitian ini adalah mengoptimasi kondisi fermentasi terbaik strain Bakteri Asam Asetat penghasil selulosa yaitu isolat SLK-1.  Strain ini diisolasi dari buah salak pada penelitian sebelumnya.  Hasil optimasi menunjukkan bahwa kondisi fermentasi optimum untuk pertumbuhan dan produksi selulosa pada isolat SLK-1  dicapai dengan sumber karbon gula pasir, sumber nitrogen ammonium sulfat, pH 7, suhu inkubasi 25°C dan metode fermentasi statis. Karakter struktur permukaan selulosa hasil fermentasi isolat SLK-1 dipengaruhi oleh metode fermentasi yang digunakan.  Metode fermentasi goyangan berpengaruh menurunkan produksi selulosa pada  isolat SLK-1 dan merubah struktur permukaan yaitu susunan mikrofibril lebih renggang dan membentuk gelembung.   Kata Kunci: bakteri asam asetat, optimasi, fermentasi, selulosa bakteri, penggoyangan
KEANEKARAGAMAN SPESIES BAKTERI PADA KULTUR DARAH WIDAL POSITIF ASAL KOTA SEMARANG BERDASARKAN KARAKTER FENOTIPIK Darmawati, Sri; Sembiring, Langkah; Asmara, Widya; T. Artama, Wayan
Prosiding Seminar Biologi Vol 9, No 1 (2012): Seminar Nasional IX Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

ABSTRAK   Tujuan penelitian ini untuk menentukan keanekaragaman spesies bakteri pada kultur darah Widal positif  Asal kota Semarang berdasrkan karakter fenotipik. Sampel darah yang dikultur sebanyak 136 sampel berasal dari pasien rawat inap dan rawat jalan di 4 rumah sakit serta 2 puskesmas di kota Semarang (RSUD Kota Semarang, RSUD Tugurejo, RS. Islam Sultan Agung,  dan 2 Puskesmas yaitu Kedungmundu dan Bangetayu.  Kultur darah digunakan medium BacT/Alert FAN blood culture bottles (Biomerieux), subkultur digunakan medium Blood Agar Plate (BAP, OXOID) dan Mac Conkey (MC, OXOID), dilanjutkan  uji biokimia digunakan medium API 20E dan API 50CHB/E untuk identifikasi strain anggota familia Enterobacteriaceae serta APIStap (Biomerieux) untuk identifikasi spesies anggota Staphylococcus. Kultur darah positif sebanyak 59 sampel (43.4%) terdiri dari 44 sampel (32,4%) positif Staphylococcus sp. (S. aureus, S. saprophyticus, S. xylosus, S. warnei, S. hominis, S. cohnii) dan 15 sampel (11%) positif bakteri batang gram negatif anggota familia Enterobacteriaceae yaitu Enterobacter cloacae, S. typhi, Serratia marcescens, Escherichia coli, Salmonella ssp., Klebsiella pneumoniae ssp. Ozanae. Berdasarkan karakter fenotipik  bakteri batang gram negatif dapat dikelompokkan menjadi 4 kluster, kluster pertama beranggotakan S. typhi , kluster kedua beranggotakan E. coli dan Salmonella ssp., kluster ketiga beranggotakan Ser. Marcescens dan kluster keempat beranggotakan Enterobacter cloacae dan Kleb. pneumoniae ssp. Ozaenae. Bakteri kokus gram positif berdasarkan karakter fenotipiknya dapat dikelompokkan menjadi 6 kluster  yang tampak sangat bervariasi   Kata kunci:  Widal, Kultur darah, BacT/Alert FAN, API 20E, API 50 CHB/E, API Stap
Ecological Approach to Unravel Streptomycete Diversity as an Unsurpassed Sources of Natural Bioactive Products SEMBIRING, LANGKAH; GOODFELLOW, MICHAEL
Microbiology Indonesia Vol 2, No 2 (2008): August 2008
Publisher : Indonesian Society for microbiology

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Abstract

Search and discovery for natural bioactive products have been so important to control the emergence of antibiotic resistant microbial pathogens. Therefore, novel microorganisms that produce such metabolites is extremely needed. The capacity of members of the genus Streptomyces to produce commercially significant bioactive metabolites, notably antibiotics remains unsurpassed. However, it is acknowledged that discovering commercially useful secondary metabolites from streptomycetes is becoming more difficult due to lack of knowledge on the ecology and complexity of streptomycete systematics. In fact, those are fundamental aspects for developing strategy and method for isolation. In order to devise an appropriate program for successful selective isolation of sreptomycetes, it is fundamentally important to understand their occurance and activity in nature. A multistep extraction procedure designed for representative sampling, called dispersion, and differential centrifugation technique in combination with the incorporation of antibiotics into isolation media has become one of the most important selective method for the isolation of streptomycetes from natural habitats. The availability of new procedures to selectively isolate representative of streptomycetes from natural habitats opens up the possibility to determine the extent of streptomycete diversity from various habitats. Hence, the capacity of well characterized streptomycete isolates to produce commercial novel active metabolites could be further assessed appropriately.
OPTIMASI KONDISI FERMENTASI UNTUK PRODUKSI SELULOSA BAKTERI OLEH STRAIN SLK-1 DALAM MEDIA DASAR AIR KELAPA (Optimization Of Fermentation Conditions For The Production Of Bacterial Cellulose By Slk-1 Strain In Coconut Water Based Medium) Sarkono, Sarkono; Moeljopawiro, Sukarti; Setiaji, Bambang; Sembiring, Langkah
Prosiding Seminar Biologi Vol 9, No 1 (2012): Seminar Nasional IX Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

ABSTRAK   Tujuan penelitian ini adalah mengoptimasi kondisi fermentasi terbaik strain Bakteri Asam Asetat penghasil selulosa yaitu isolat SLK-1.  Strain ini diisolasi dari buah salak pada penelitian sebelumnya.  Hasil optimasi menunjukkan bahwa kondisi fermentasi optimum untuk pertumbuhan dan produksi selulosa pada isolat SLK-1  dicapai dengan sumber karbon gula pasir, sumber nitrogen ammonium sulfat, pH 7, suhu inkubasi 25°C dan metode fermentasi statis. Karakter struktur permukaan selulosa hasil fermentasi isolat SLK-1 dipengaruhi oleh metode fermentasi yang digunakan.  Metode fermentasi goyangan berpengaruh menurunkan produksi selulosa pada  isolat SLK-1 dan merubah struktur permukaan yaitu susunan mikrofibril lebih renggang dan membentuk gelembung.   Kata Kunci: bakteri asam asetat, optimasi, fermentasi, selulosa bakteri, penggoyangan
KEANEKARAGAMAN SPESIES BAKTERI PADA KULTUR DARAH WIDAL POSITIF ASAL KOTA SEMARANG BERDASARKAN KARAKTER FENOTIPIK Darmawati, Sri; Sembiring, Langkah; Asmara, Widya; T. Artama, Wayan
Prosiding Seminar Biologi Vol 9, No 1 (2012): Seminar Nasional IX Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

ABSTRAK   Tujuan penelitian ini untuk menentukan keanekaragaman spesies bakteri pada kultur darah Widal positif  Asal kota Semarang berdasrkan karakter fenotipik. Sampel darah yang dikultur sebanyak 136 sampel berasal dari pasien rawat inap dan rawat jalan di 4 rumah sakit serta 2 puskesmas di kota Semarang (RSUD Kota Semarang, RSUD Tugurejo, RS. Islam Sultan Agung,  dan 2 Puskesmas yaitu Kedungmundu dan Bangetayu.  Kultur darah digunakan medium BacT/Alert FAN blood culture bottles (Biomerieux), subkultur digunakan medium Blood Agar Plate (BAP, OXOID) dan Mac Conkey (MC, OXOID), dilanjutkan  uji biokimia digunakan medium API 20E dan API 50CHB/E untuk identifikasi strain anggota familia Enterobacteriaceae serta APIStap (Biomerieux) untuk identifikasi spesies anggota Staphylococcus. Kultur darah positif sebanyak 59 sampel (43.4%) terdiri dari 44 sampel (32,4%) positif Staphylococcus sp. (S. aureus, S. saprophyticus, S. xylosus, S. warnei, S. hominis, S. cohnii) dan 15 sampel (11%) positif bakteri batang gram negatif anggota familia Enterobacteriaceae yaitu Enterobacter cloacae, S. typhi, Serratia marcescens, Escherichia coli, Salmonella ssp., Klebsiella pneumoniae ssp. Ozanae. Berdasarkan karakter fenotipik  bakteri batang gram negatif dapat dikelompokkan menjadi 4 kluster, kluster pertama beranggotakan S. typhi , kluster kedua beranggotakan E. coli dan Salmonella ssp., kluster ketiga beranggotakan Ser. Marcescens dan kluster keempat beranggotakan Enterobacter cloacae dan Kleb. pneumoniae ssp. Ozaenae. Bakteri kokus gram positif berdasarkan karakter fenotipiknya dapat dikelompokkan menjadi 6 kluster  yang tampak sangat bervariasi   Kata kunci:  Widal, Kultur darah, BacT/Alert FAN, API 20E, API 50 CHB/E, API Stap
UJI AKTIVITAS ANTIBAKTERI ISOLAT ACTINOMYCETES DARI RIZOSFER PADI (Oryza sativa) TERHADAP Salmonella typhosa DAN Staphylococcus aureus Ambarwati, Ambarwati; S, Tanti Azizah; Sembiring, Langkah; Wahyuono, Subagus
Prosiding Seminar Biologi Vol 10, No 2 (2013): Seminar Nasional X Pendidikan Biologi
Publisher : Prodi Pendidikan Biologi FKIP UNS

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Abstract

Actinomycetes merupakan anggota bakteri yang dipromosikan sebagai penghasil zat  antimikrobial  terbesar.  Tujuan penelitian ini adalah untuk mengisolasi dan mengidentifikasi Actinomycetes dari rizosfer padi (Oryza sativa) yang berpotensi sebagai penghasil antibakteri dan dapat menghambat pertumbuhan Salmonella typhosa dan Staphylococcus aureus. Penelitian ini menghasilkan 17 isolat Actinomycetes, 8 isolat diantaranya mampu menghasilkan zat antibakteri. Diantara 8 isolat tersebut, satu isolat mampu menghambat pertumbuhan kedua bakteri uji, yaitu NRPR 13 yang menghambat Salmonella typhosa (dengan diameter daerah hambatan 14 mm) dan Staphylococcus aureus (12 mm). Tiga isolat mampu menghambat pertumbuhan bakteri Salmonella  typhosa, yaitu NRPR  14  (11 mm), NRPR  62 dan NRPR 67 (masing-masing 10 mm). Dan empat isolat mampu menghambat pertumbuhan Staphylococcus aureus, yaitu RPR 15 (14 mm),  NRPR 11 (17 mm), NRPR 33 (11 mm) dan NRPR 46 (16 mm).  Berdasarkan hasil penelitian ini dapat disimpulkan bahwa Actinomycetes yang diisolasi dari rizosfer padi berpotensi menghasilkan zat antibakteri. Kata kunci : Actinomycetes,  Zat Antibakteri, S. typhosa,  S. aureus.
A Study on Production of Poly-β-Hydroxybutyrate Bioplastic from Sago Starch by Indigenous Amylolytic Bacteria Yanti, Nur Arfa; Sembiring, Langkah; Margino, Sebastian; Muhiddin, Nurhayani H.
Indonesian Journal of Biotechnology Vol 18, No 2 (2013)
Publisher : Universitas Gadjah Mada

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Abstract

Bacillus sp. PSA10 and Bacillus sp. PPK5 were two indigenous strain amylolytic bacteria from SoutheastSulawesi that have ability to produce bioplastic poly-β-hydroxybutyrate (PHB) from sago starch. The study wasattempted to determine the mechanism of PHB production by bacteria amylolytic was grown on sago starchcontainingmedia. Two amylolytic bacteria i.e. Bacillus sp. PSA10 and Bacillus sp. PPK5 was grown for 168 hin a mineral salts medium with sago starch as carbon source. Growth of amylolytic bacteria was monitoredby cell dry weight. Extraction of PHB was done by N-hexane acetone-diethyl ether method and PHB contentwas quantifi ed with UV spectrophotometer at 235 nm. Glucose level was determined by using kit of glucoseGOD 10” and was quantifi ed with spectrophotometer at 500 nm. Sago starch concentration was determinedby phenol method using specthrophotometer at 490 nm. The result of the study showed that Bacillus sp.PSA10 was produced PHB up to 66,81 % (g PHB/g cell dry weight) at 48 h and Bacillus sp. PPK5 up to 24,83% (g PHB/g cell dry weight) at 84 h. Bacillus sp. PSA10 has ability to converse sago starch to be PHB directlywithout glucose accumulation in the media, whereas Bacillus sp. PPK5 have to accumulate glucose as productof sago starch hydrolysis to produce of PHB. PHB synthesis by Bacillus sp. PHB production on sago starchof the Bacillus sp. PSA10 was found to be growth-associated whereas Bacillus sp. PPK5 was found to be nongrowth-associated. Therefore, two indigenous amylolytic bacteria were having of difference in biosynthesismechanism of PHB in sago starch medium and their characteristics of PHB synthesis should be consideredin developing cultivation methods for the effi cient production of PHB.Keywords : Production, PHB, Amylolytic bacteria, Sago starch.
Production of Poly--hydroxybutyrate (PHB) from Sago Starch by The Native Isolate Bacillus megaterium PSA10 Yanti, Nur Arfa; Sembiring, Langkah; Margino, Sebastian
Indonesian Journal of Biotechnology Vol 14, No 1 (2009)
Publisher : Universitas Gadjah Mada

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Abstract

A new bacterial strain that produces amylase and poly-a-hidroxybutyrate (PHB) using sago starch as carbon source was characterized and identified to be member of the Bacillus megaterium group based on phenotypic characteristics  and 16S rDNA gene sequences. Amylase activity was determined spectrophotometrically on the basis of substrate concentration reduction. PHB production was quantified with UV spectrophotometer. The polymer produced by B. megaterium PSA10 was identified by  Fourier Transform Infrared spectroscopy (FTIR). The result of the study showed that the amylase specific activity B. megaterium PSA10 was 593,61 DUN/mg protein and PHB production from sago starch was 52,28 % of cell dry weight (CDW). FTIR analysis of the polymer indicated that the strain B.megaterium PSA10 was a potent PHB producer.
Phylogenetic relationship of Gram Negative Bacteria of Enterobacteriaceae Family in the Positive Widal Blood Cultures based on 16S rRNA Gene Sequences Darmawati, Sri; Sembiring, Langkah; Asmara, Widya; Artama, Wayan T.; Kawaichi, Masashi
Indonesian Journal of Biotechnology Vol 19, No 1 (2014)
Publisher : Universitas Gadjah Mada

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Abstract

The purpose of this study was to analyze the phylogenetic relationship of Gram negative bacteria (3strains of Salmonella typhi, 1 strain of Escherichia coli, 1 strain of Serratia marcescens, and 3 strains of Enterobactercloacae) of Enterobacteriaceae family in positive Widal blood cultures based on 16S rRNA gene sequences. Theresults respectively showed that each two 16S rRNA gene clones of Serratia marcescens KD 08.4 had a closerelationship with 16S rRNA gene of Serrratia marcescens ATCC 13880 (similarity: 99.53-99.8%), Eschericia coliBA 30.1 with Eschericia coli ATCC 11775T (similarity: 99.38-99.67%), Salmonella typhi BA 07.4, Salmonella typhiKD 30.4, and Salmonella typhi SA 02.2 with Salmonella typhi ATCC 19430T (similarity: 99.4-100%) as well as theisolates of Enterobacter cloacae SA 02.1, Enterobacter cloacae BA 45.4.1, one 16S rRNA gene clone of Enterobactercloacae TG 03.5 with Enterobacter cloacae ATCC 23373 (similarity: 99.0-99.87%).
Production of Poly-α-hydroxybutyrate (PHB) from Sago Starch by The Native Isolate Bacillus megaterium PSA10 Yanti, Nur Arfa; Sembiring, Langkah; Margino, Sebastian
Indonesian Journal of Biotechnology Vol 11, No 1 (2006)
Publisher : Universitas Gadjah Mada

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Abstract

A new bacterial strain that produces amylase and poly-α-hidroxybutyrate (PHB) using sago starch as carbon source was characterized and identified to be member of the Bacillus megaterium group based on phenotypic characteristics and 16S rDNA gene sequences. Amylase activity was determined spectrophotometrically on the basis of substrate concentration reduction. PHB production was quantified with UV spectrophotometer. The polymer produced by B. megaterium PSA10 was identified by Fourier Transform Infrared spectroscopy (FTIR). The result of the study showed that the amylase specific activity B. megaterium PSA10 was 593,61 DUN/mg protein and PHB production from sago starch was 52,28 % of cell dry weight (CDW). FTIR analysis of the polymer indicated that the strain B.megaterium PSA10 was a potent PHB producer.