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Identifikasi Isolat Aspergillus sp. KRM 43 dari Madura dan Produksi Enzim Protease dengan Variasi pH dan Waktu Inkubasi Nopvita Windi Astuti; MG. Isworo Rukmi; w wijanarka
Jurnal Akademika Biologi Vol. 4 No. 3 Juli 2015
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Proteases is an enzyme that has a high economic value, because they widely used for application in the field of industry.Protease can be generated from microorganisms, one of protease producer is derived from the genus Aspergillus. Aspergillus sp. KRM 43 that has isolated from alkaline soil can be predicted capable to produce alkaline protease. The purpose of this study was  to know the optimum of pH and incubation time for enzyme production from the mould. This research was conducted using a  factorial Randomized Complete Block Design with two factor i.e. a pH of 7, 8, 9 and incubation time of 5, 6, 7 days. Data collected were analyzed using Anova (α 0,05). The mould isolate were identified by observing its macroscopic and microscopic morphology. The result showed that Aspergillus sp. KRM 43 was identified as Aspergillus parasiticus. In this study showed pH treatment hadn't been  able to affect the production of protease. The highest proteases alkaline production of A. parasiticus KRM 43, found at 7 days incubation with proteases activity 2.24 U/mL and the specific activity 7.23 U/mg.Key words: Proteases, Aspergillus parasiticus, pH, incubation time
AKTIVITAS ENZYM SELULASE YANG DIHASILKAN OLEH BAKTERI Serratia marcescens PADA SUBSTRAT JERAMI Khrisna Lazuardi Budi; W Wijanarka; Endang Kusdiyantini
Jurnal Akademika Biologi Vol. 7 No. 1 Januari 2018
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Cellulose (EC 3.2.1.4) is enzyme complex consisting of some enzymes which together decomposing cellulose into glucose by hydrolizes the β-1,4 bond in cellulose. The purpose of this study is to determine cellulose activity which produced by Serratia marcescens in different substrate concentration and at the time of incubation T4, T8, T12. This research uses Randomized Block Design (RBD) factorial pattern with two factors. The first factor was variation of straw substrate which had been delignificated (V0, V1, V2, V3). The second factor is the variation of time incubation (T4, T8, T12). Each factor is repeated 3 times. The data obtained were analyzed using Analysis  of  Variance (ANOVA)  (α  =  0.05). The result  shown that  variation concentration  of straw,  and the interaction (combination) between the straw substrate and the incubation time substrate was not significantly different. The result treatment of incubation time was significantly different of the cellulase activity. The result of anova analyzed is obtained that F count(α = 0.05) value from straw substrate, interaction (combination) between the straw substrate and the incubation time substrate, and incubation time was 0.53; 2.18; 8.00. F table(α = 0.05) value of straw substrate, interaction (combination) between the straw substrate and the incubation time substrate, and incubation time was 2.99; 2.20; 3.39. The result of anova, is continued by BNT 5% test. The result of BNT test shown that the highest incubation time of cellulase activity was in incubation time 12 hours with the average value 0.26 U/mL. Key Word : cellulose,  Serratia marcescens,  straw substrate, incubation time
AKTIVITAS SPESIFIK SELULASE Serratia marcescens DENGAN VARIASI KONSENTRASI AMONIUM SULFAT ((NH4)2SO4) DAN pH Prawatya Cahyani; W Wijanarka; Budi Raharjo
Jurnal Akademika Biologi Vol. 6 No. 2 April 2017
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Cellulose is a component found in the cellular structure in almost all plant matter, its existence considered to be the most abundant on earth, and even excreted by some bacteria. Cellulose degradation is performed by cellulase enzymes consisting of three components, namely, endoglucanase, exoglucanase, and β-glucosidase enzyme with glucose as the final product. Cellulase utilization is often used in the textile, food and paper industries, whereas in the field of pharmaceuticals, cellulase enzymes are used to maintain optimal digestive health or produce substances that act as binding tablets such as methylcellulose, ethylcellulose, and hydroxypropylcellulose. The purpose of this study is to determine the concentration of ammonium sulfate and optimum pH for cellulose specific activity of Serratia marcescens. Determination of cellulase activity was done by DNS method, while determination of protein content was done by Lowry method. This research uses Randomized Block Design (RAK) factorial pattern with two factors. The first factor was variation of ammonium sulfate concentration which consisted of (0%, 0,75% and 1%). The second factor is the variation of pH consisting of 6, 7, and 8. Each factor is repeated 3 times. The data obtained were analyzed using Analysis Of Variance (ANOVA). The results showed that the combination of ammonium sulphate concentration variation with pH was not optimum to increase cellulose specific activity of S. marcescens.    Keywords: Cellulase, Ammonium sulfate, pH, Serratia marcescens
ISOLASI DAN IDENTIFIKASI BAKTERI GENUS Sphingomonas DARI DAUN PADI (Oryza sativa) DI AREA PERSAWAHAN CIBINONG Gabriela Christy Sabbathini; Sri Pujiyanto; w wijanarka
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
PRODUKSI ENZIM INULINASE Pichia manshurica DUCC-Y015 DENGAN PENAMBAHAN SUBSTRAT TEPUNG BENGKOANG (Paschyrhizus erosus) Adzar Rofiqoh; W Wijanarka; Susiana Purwantisari
Jurnal Akademika Biologi Vol. 6 No. 4 Oktober 2017
Publisher : Departemen Biologi, Fakultas Sains dan Matematika Undip

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Abstract

Bengkoang (Pachyrhizus erosus) tubers has a high inulin content. Inulin bengkoang flour can be used as substrate to produce inulinase enzyme. The inulinase enzyme can be produced by Pichia manshurica DUCC-Y015. This research aims to determine the ability of Pichia mansurica DUCC-Y015 in producing inulinase enzyme with the addition of several variations of substrate concentration of bengkoang flour in its production medium. Determination of inulinase activity was done by DNS method. This research used a Completely Randomized Design (RAL) with 4 treatments: B0 (control), B1 (1 g bengkoang flour), B2 (3 g bengkoang flour) and B3 (5 g bengkoang flour). Each treatment was repeated 3 times. The inulinase activity of each treatment was 0.029 IU/mL, 0.033 IU/mL, 0.053 IU/mL and 0.015 IU/mL. The addition of variation substrate concentration bengkoang flour in the production medium did not affect the inulinase activity of Pichia manshurica DUCC-Y015Kata Kunci: Pachyrhizus erosus, inulinase, Pichia manshurica DUCC-Y015.
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 Riza Laksita Devi Mutiaratri; W Wijanarka; Sri pujiyanto
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
Co-Authors Adzar Rofiqoh Agung Suprihadi Annisaa Widyasari Anto Budiharjo Berlian Abadianti Budi Raharjo Dahniar Saraswati Dani Sukma Saefunida Endang Kusdiyantini Fathika Fitrania Firly Putri Fardilla Gabriela Christy Sabbathini Hermin Pancasakti Kusumaningrum Indra Prawira Khrisna Lazuardi Budi Mamik Setyowati MG Isworo Rukmi Nopvita Windi Astuti Novik Nur Hidayat Prawatya Cahyani Rahayu Damayanti Riza Laksita Devi Mutiaratri Siti Nur Jannah Siu S.S Langden Sri Hartin Rahaju Sri Pujiyanto Susiana Purwantisari Wien Kusharyoto Yoni Anggun Endah Kurniati