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Pengaruh Penambahan Tepung Azolla Sp. dan Perbedaan Waktu Inkubasi Terhadap Produksi Inulinase Khamir Pichia manshurica DUCC Y-015 Pada Medium Tepung Umbi Dahlia (Dahlia Variabilis Willd.)

Jurnal Akademika Biologi Vol. 7 No. 4 Oktober 2018
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Inulin merupakan polimer fruktosa berserat pangan tinggi yang salah satunya ditemukan pada umbi dahlia yang disekitar perakarannya  ditemukan Pichia manshurica. P. manshurica menghasilkan enzim inulinase yang dapat memecah inulin menjadi uni-unit fruktosa dan digunakan sebagai bahan bahan baku pembuatan sirup fruktosa. Berdasarkan manfaat yang dimiliki inulin tersebut, telah banyak dilakukan penelitian mengenai optimasi produksi enzim inulinase oleh P. manshurica DUCC Y-015 untuk mendapatkan produk yang optimal. Optimasi produksi enzim inulinase dapat dilakukan dengan memodifikasi kandungan nutrisi dalam medium, salah satunya dengan menambahkan sumber nitrogen pada medium produksi. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan tepung Azolla sp. sebagai sumber nitrogen dan perbedaan waktu inkubasi. Penelitian dilakukan secara eksperimental menggunakan Rancangan Acak Kelompok pola factorial, dengan tiga kali ulangan. Faktor pertama adalah variasi konsentrasi tepung Azolla sp., yaitu 0%; 0,14%; 0,28%; dan 0,42%. Faktor kedua adalah variasi waktu inkubasi yaitu 0 jam; 6 jam; 12 jam; 18 jam; dan 24 jam.  Hasil perhitungan Anova menunjukkan bahwa penambahan berbagai konsentrasi Azolla sp. pada medium produksi belum mempengaruhi aktivitas inulinase dan invertase P. manshurica DUCC Y-015, sedangkan waktu inkubasi berpengaruh nyata terhadap aktivitas inulinase dan  aktivitas invertase. Berdasarkan uji BNT, waktu inkubasi optimal aktivitas inulinase dan invertase adalah pada waktu inkubasi 6 jam. 

Produksi Enzim Inulinase Khamir Pichia manshurica DUCC Y-015 Dari Tepung Umbi Dahlia (Dahlia variabilis Willd.) Dengan Variasi Konsentrasi Magnesium Sulfat (MgSO4.7H2O) Dan Waktu Inkubasi

Jurnal Akademika Biologi Vol. 4 No. 2 April 2015
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Dahlia tubers (Dahlia variabilis Willd.) contain inulin which can be hydrolyzed by the inulinase enzyme (E.C.3.2.1.7) into fructose monomer units. Application of  inulinase enzyme is used in the production of HFS (High   Fructose  Syrup)  dan  FOS  (Fructo-oligosaccharides).  Inulinase  can  be  produced  by  several microorganisms  including  inulinolytic  yeast  Pichia  manshurica  DUCC  Y-015.  One  of  the  factors  that influence the production of enzyme inulinase is macro minerals and incubation time on production medium. This study aims to determine the concentration of magnesium sulphate (MgSO4.7H2O) and the most optimal incubation time in producing the inulinase  enzyme. The research was carried out experimentally using a Randomized Block Design factorial. The first factor is the concentration MgSO4.7H2O those are 0,5 g/L; 1 g/L; and 1,5 g/L. The second factor is the variation of the incubation time, those are 12 hours; 18 hours; and24 hours, repetition was performed three times. Data were analyzed using ANOVA with 5% significant level(α = 0,05) and Duncan Test for further analysis. The results showed that the variation of the concentration ofMgSO4.7H2O has not been able to increase the production of inulinase enzyme, while the incubation time of18 hours produced the inulinase enzyme activity of 0,9605 IU/mL. Keywords:  Inulinase,  Dahlia  variabilis  Willd.,  Pichia  manshurica  DUCC  Y-015,  MgSO4, Incubation Time

AKTIVITAS INHIBITOR Α-AMILASE ISOLAT KHAMIR ENDOFIT DARI TUMBUHAN BROTOWALI (Tinospora crispa L.)

Jurnal Akademika Biologi Vol. 6 No. 3 Juli 2017
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Diabetes mellitus is a carbohydrate, fat, and protein metabolism disorder characterized by high blood sugar level. The α-amylase inhibitor may inhibit the carbohydrates digestion and cause a rate decrease of glucose absorption. The α-amylase inhibitors are found in a plant that potentially containing antidiabetic compounds, such as Brotowali (Tinospora crispa L.). The exploration of endophytic microbial is expected can produce secondary metabolites with similar properties to those produced by host plant metabolites. The purpose of this research were to obtain endophytic yeast isolates which can produce the best α-amylase inhibitors and to determine the ability of selected isolates to produce α-amylase inhibitors on varied carbon source and pH production media. This research was conducted by isolating endophytic yeast from roots, stems, and leaves of brotowali. The best isolate was selected by considering its inhibitory activity. The α-amylase inhibitor test was determined by measuring the resulting reduction sugar. This research used Completely Randomised Design. First treatment was carbon source media, such as starch, sucrose, maltose and lactose. The best carbon source then was used for further tests. Second treatment was pH media including pH of 5, 6, 7 and 8. The data obtained later were analyzed using One Way ANOVA. The selection results showed that  DG26 isolate had the best α-amylase inhibition value of 68.27% with 72 hours optimal time production. The statistical result test on the varied carbon source treatment showed insignificant effect (P> 0,05) with the best α-amylase inhibition value of 19,98% at starch treatment. The statistical result test on the varied pH treatment showed a significant different effect (P <0.05) with the best α-amylase inhibition value of 44.91% at pH 7.Keywords: α-amylase inhibitor, endophytic yeast, Tinospora crispa, carbon source, pH

ISOLASI, UJI AKTIVITAS, DAN OPTIMASI INHIBITOR α-AMILASE ISOLAT KAPANG ENDOFIT TANAMAN BINAHONG (Anredera cordifolia) (Ten.) Steenis

Jurnal Akademika Biologi Vol. 7 No. 1 Januari 2018
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Diabetes mellitus (DM) is a hyperglycemia disease caused by insensitivity of cells to insulin that causes the presence of glucose in blood and urine. The α-amylase inhibitors is a compound that inhibit carbohydrates breakdown into glucose by amylase enzyme. Binahong (Anredera cordifolia) has been used by Indonesian people since long time ago to treat various diseases such as for anti-diabetic. The aims of study were to obtained the endophytic fungal isolated from Binahong plant, and find out of their ability of α-amylase inhibitor activity by treatment of carbon source and pH of production medium. The isolating endophytic fungal from binahong roots, stems, and leaves in medium PDA. The α-amylase inhibitory test was using starch substrate and the α-amylase inhibitory measure using spectrophotometric method. The study was used one factor CRD i.e. carbon source including sucrose, lactose, and maltose. The best carbon source then continued to test with variation pH 5,6, and 7. The data obtained were then analyzed by Analysis of Variance (ANOVA). Five endophytic fungal isolated from binahong were only one isolated i.e DT should high potensial in inhibiting α-amylase 91,43%. The best carbon source for inhibitory α-amylase i.e sucrose with the percentage of 58,91%, while pH 5 is the best pH medium production continous treatment carbon source sucrose with the percentage 37,83%. The result of statistical test showed that sucrose as the best carbon source just than lactose and maltose, and pH 5 as the best medium pH for the production α-amylase inhibitor. Key words : α-amylase inhibitor, endophyte fungi, Anredera cordifolia, diabetes mellitus

ISOLASI DAN IDENTIFIKASI BAKTERI GENUS Sphingomonas DARI DAUN PADI (Oryza sativa) DI AREA PERSAWAHAN CIBINONG

Jurnal Akademika Biologi Vol. 6 No. 1 Januari 2017
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

The unique ability of  the genus Sphingomonas bacteria as degrade the contaminants refractory contaminants, to serve as the antagonists bacteria to phytopathogenic fungi, and capable to secrete  hidhly useful exopolysaccharide gellan make these bacteria may play an important role in various industrial fields. Exploitation of the metabolic capabilities by genus Sphingomonas bacteria can provide significant commercial advantages for biotechnology.The species of Sphingomonas are often found associated with the rice plant as one of the endophytic bacteria that can be cultured. This study aims to isolate the local bacteria that can produce gellan gum from the leaves of the rice plant (Oryza sativa). The isolation process is done with a spread plate method suspension of rice leaves on Nutrient Dextrose Agar (NDA) media. Single colonies of bacteria that can be isolated then identified by colony PCR method to proceed at sequencing process. Sequencing followed by equalization sequences on the BLAST program shows four isolates of the genus Sphingomonas which isolates XA1, XA2, XA6, XA12 with the results are Sphingomonas sp. Fse41, Sphingomonas sp. Fse41, Sphingomonas sanguinis L4-317 strain and Sphingomonas sp. MLB01Keywords: endophytic bacteria, padi, Sphingomonas

ISOLASI DAN KARAKTERISASI ISOLAT KONSORSIUM BAKTERI LAHAN PERTANIAN SEBAGAI POTENSI DEGRADASI PESTISIDA PROPOXUR

Jurnal Akademika Biologi Vol. 3 No. 4 Oktober 2014
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Propoxur pesticide is a pesticide used widely enough by the Indonesian agricultural community. This pesticide is used as a systemic pesticide in agricultural areas to deal with pests as well as insecticides, herbicides, and bactericide. Study of the degradation of propoxur has long performed using the bacterial bioremediation agent. Bacterial consortium is a combination of several bacteria in a medium which that has a complementary function in the environment. The purpose of this study was the isolation and characterization of a consortium of farms that use propoxur pesticide. Isolation was done by spread plate and was observed characteristics of colony morphology. The obtained isolates were tested against propoxur and its potential role in the consortium. Degradation of propoxur observations using High Performance Liquid Cromatography (HPLC). Isolation results obtained 8 (eight) bacterial isolates and one that have an important role in the consortium is K1 isolate. K1 isolate were able to work up a consortium to degrade Propoxur in 2 isolates with K2 isolate. The interaction of these bacteria are natural and have a tendency to vary in nature after a process of isolation. K1 isolate are not able to work alone in a mineral medium, and worked with synergistic and complementary that in the bacterial consortium. KSR consortium optimum growth occurs in an environment with temperature 35 °C and pH 6.Keywords: Isolation, Propoxur, Bioremediation, Bacterial Consortium, HPLC

UJI AKTIVITAS ANTIBAKTERI EKSTRAK TUMBUHAN Euphorbia hirta L. TERHADAP Ralstonia solanacearum, Escherichia coli, DAN Staphylococcus aureus SECARA IN VITRO

Jurnal Akademika Biologi Vol. 3 No. 2 April 2014
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Biocontrol using Patikan kebo (Euphorbia hirta L.) plant is an alternative solution to control pathogenic bacteria. Such wild plant is known to contain active compounds with antibacterial activity such as tannins, alkaloids, flavonoids, saponins, and phenols. This study aims to determine the antibacterial activity of the methanol extract of E. hirta against R. solanacearum, E. coli and S. aureus. The extraction method of E. hirta was maceration with methanol solvent, while antibacterial activity test using the agar diffusion method (Kirby-Bauer) with test bacteria was R. solanacearum, E. coli and S. aureus. E. hirta extract tested was pure extract (100%). Observed response was diameter of inhibitory zone formed around the paper discs that had been smeared with E. hirta extract on the media. Analysis of the data using a Completely Randomized Design (CRD) 1 factor (test bacteria) with three times repetition, followed by a further test of Duncan with 95% confidence level. The results indicated that E. hirta produced extraction yield of 6,45%. Antibacterial activity of E. hirta extract against R. solanacearum, E. coli and S. aureus was indicated by Inhibitory Zone Diameter (HZD), respectively for 21,8 mm, 18,26 mm and 17,06 mm. The results of this study showed that the methanol extract of E. hirta plant had antibacterial activity against R. solanacearum, E. coli and S. aureus, thus can be used as a biocontrol agent of bacterial wilt disease in plants caused by R. solanacearum and human disease caused by E. coli and S. aureus. Keywords: Euphorbia hirta, Ralstonia solanacearum, Escherichia coli, Staphylococcus aureus, antibacterial activity, diffusion method

Aktivitas Bakteri Kitinolitik Akuatik Isolat Lokal Terhadap Perkembangan dan Mortalitas Larva Nyamuk Aedes Aegypti L

SAINS DAN MATEMATIKA Volume 19 Nomor 2 Tahun 2011
Publisher : SAINS DAN MATEMATIKA

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Abstract

Pengendalian populasi nyamuk Aedes aegypti sangat penting dalam rangka pencegahan terjadinya wabah penyakit demam berdarah. Beberapa bakteri memiliki aktivitas kitinolitik sehingga berpotensi digunakan sebagai agen biokontrol terhadap nyamuk  Aedes aegypti, karena komponen eksoskeleton larva nyamuk  tersebut tersusun dari bahan kitin.Tujuan dari penelitian ini adalah untuk mendapatkan isolat bakteri kitinolitik akuatik lokal yang dapat digunakan sebagai biokontrol larva nyamuk  Aedes aegypti. Bakteri kitinolitik diisolasi menggunakan media selektif agar kitin. Sumber isolat diperoleh dari berbagai sampel air yang diperoleh dari daerah Klaten, Boyolali dan Jepara. Isolat yang diperoleh diseleksi untuk mendapatkan isolat dengan aktivitas tinggi. Uji aktivitas bakteri terhadap larva nyamuk menggunakan media air mineral. Hasil penelitian diperoleh satu isolat dengan kode B6 yang mampu menyebabkan kematian larva nyamuk sebesar 97% dalam waktu 108 jam. Isolat ini berpotensi digunakan sebagai agen bioinsektisida untuk pengendalian larva nyamuk A. aegypti.Keywords: Bakteri kitinolitik, demam berdarah, Aedes aegypti, biokontrol

Flavonoids Production Capability Test of Tea Mistletoe (Scurrula atropurpurea BL . Dans) Endophytic Bacteria Isolates

JURNAL SAINS DAN MATEMATIKA Volume 22 Issue 4 Year 2014
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

Tea Mistletoe (S. Atropurpurea BL. Dans) is a medicinal plant species used as anticancer because it contains some flavonoids compounds are chalcones, c-glycoflavonols, chatechin and quercetin. The ability of endophytic bacteria to produce similar bioactive compounds with its host plant is potential source to get flavonoids compounds. This research aims to know ability of endophytic bacteria in produce flavonoids compounds in vitro. Each isolate was fermented in submerged culture with 0.1% soluble starch, 0.5% pepton, and 0.15% yeast extract medium for 5 days, then extracted with ethyl acetate. Flavonoid content of the extract then was tested qualitatively and confirmation test used thin layer chromatography. Qualitative test results showed that crude extract from isolates B4, B5, B10, B17, and B19 positive containing flavonoids. The most potent extract were B10 and B19 tested by thin layer chromatography. Two of these extracts had the same Rf value with quercetin, thus endophytic bacteria from tea mistletoe can produce flavonoids in vitro.

Aktivitas Bakteri Kitinolitik Akuatik Isolat Lokal Terhadap Perkembangan dan Mortalitas Larva Nyamuk Aedes Aegypti L

JURNAL SAINS DAN MATEMATIKA Volume 19 Issue 2 Year 2011
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

Pengendalian populasi nyamuk Aedes aegypti sangat penting dalam rangka pencegahan terjadinya wabah penyakit demam berdarah. Beberapa bakteri memiliki aktivitas kitinolitik sehingga berpotensi digunakan sebagai agen biokontrol terhadap nyamuk Aedes aegypti, karena komponen eksoskeleton larva nyamuk tersebut tersusun dari bahan kitin.Tujuan dari penelitian ini adalah untuk mendapatkan isolat bakteri kitinolitik akuatik lokal yang dapat digunakan sebagai biokontrol larva nyamuk Aedes aegypti.  Bakteri kitinolitik diisolasi menggunakan media selektif agar kitin. Sumber isolat diperoleh  dari berbagai sampel air yang diperoleh dari daerah Klaten, Boyolali dan Jepara. Isolat yang diperoleh diseleksi untuk mendapatkan isolat dengan aktivitas tinggi. Uji aktivitas bakteri terhadap larva nyamuk menggunakan media air mineral. Hasil penelitian diperoleh satu isolat dengan kode B6 yang mampu menyebabkan kematian larva nyamuk sebesar 97% dalam waktu 108 jam. Isolat ini berpotensi digunakan sebagai agen  bioinsektisida untuk pengendalian larva nyamuk A. aegypti. Keywords: Bakteri kitinolitik, demam berdarah, Aedes aegypti, biokontrol