Aktivitas Antibakteri Aktinomisetes Laut Dari Pulau Enggano [Antibacterial activity of marine actinomycetes from Enggano Island]

Shanti Ratnakomala, Pamella Apriliana, Fahrurrozi Fahrurrozi, Puspita Lisdiyanti, Wien Kusharyoto

Berita Biologi, Volume 15 Nomor 3, Desember 2016, 275-283. ISSN 0126-1754

ntibacterial activity of marine actinomycetes from Enggano IslandMarine actinomycetes were isolated from mangrove sediment from the coast in Enggano, Bengkulu Province, Indonesia using the medium NBRC No. 802 modified by the addition of 2% NaCl. A total of 29 isolates of actinomycetes were isolated from three mangrove sediment samples and evaluated their potential to produce bioactive metabolites. Screening of 29 isolates marine actinomycetes isolates were performed against three bacterial pathogens had been done. Bacteria test used was Escherichia coli NBRC 14 237, Staphylococcus aureus NBRC13 276, and Bacillus subtilis NBRC 3134. Screening result showed that seven isolates have inhibitory effects against bacteria test and 22 other isolates have no inhibition. Of the seven isolates, one isolate has inhibitory effect against the growth of Gram-negative bacteria Escherichia coli, while six other isolates inhibit Gram-positive bacteria Bacillus subtilis and Staphilococcus aureus. It was concluded that, of the 29 isolates conducted in the experiment, seven isolates produce antibacterial compounds on agar medium. Molecular identification of 23 isolates were identified based on the gene 16S RNA sequences showed that 22 isolates belong to the genus Streptomyces and one strain belongs to the genus Dermacoccus.

Keywords: marine actinomycetes, antibacterial, Enggano Island

Katalog: http://perpus.biotek.lipi.go.id/index.php?p=fstream&fid=3371&bid=15841

Disusun oleh: Ludya AB/Pustakawan


Production of Manooligomannan from Palm Kernel Cake by Mannanase Produced from Streptomyces Cyaenus

Awan Purnawan, Yopi, Tun Tedja Irawadi (2017)

Biosaintifika: Journal of Biology & Biology Education, 9(1), 73-80. p-ISSN 2085-191X

BiosaintifikaThe increase of public attention to health has prompted researchers to look for new sources of functional food. Palm Cake Kernel (PKC) waste was abundant in Indonesia, Oligosaccharide has an important benefit for human health. Recently oligosaccharide is not only important as an artificial sweetener, but also as a functional food component. This study was aimed to produce oligo-mannan enzymatically from PKC waste using mannanase derived from of Streptomyces cyaenus isolates of indigenous Indonesia. The enzyme concentration was determined by enzyme activity assay while oligo-mannan content in the PKC was analyzed using TLC and HPLC. Mannanase enzyme activity of 1706 U/ml on the second day of agitation 200 rpm at a temperature of 30°C Hydrolysis of mannooligomannan by using mannanase produced by streptomyces cyaenus. The optimum mannanase enzyme activity obtained on day 2 with the value of the activity as much of 0.702 U/mL. The protein content of the 2nd day at an agitation speed of 150 rpm, 200 rpm, and 250 rpm, respectively, were 1783, 1950 and 2283 ppm. Streptomyces cyaenus is Indonesian original isolates potentially producing mannanase that can produce mannooligomannan

Keywords: Palm Kernel Cake (PKC); Streptomyces cyaenus; mannanase enzyme; mannooligosaccharide

Katalog: http://perpus.biotek.lipi.go.id/index.php?p=fstream&fid=3370&bid=15840

Disusun oleh: Ludya AB/Pustakawan

Body Weight Estimation of Bali Cattle in Banyumulek Techno Park, West Nusa Tenggara using Several Morphometric Parameters

Paskah Partogi Agung, Widya Pintaka Bayu Putra, Saiful Anwar, and Ari Sulistyo Wulandari.

Buletin Peternakan 42 (1): 20-25, February 2018

Mean valueThis study was conducted to find the best linear regression equation to estimate the body weight (BW) of female Bali cattle in Banyumulek Techno Park, West Nusa Tenggara based on three morphometric parameters, i.e. withers height (WH), body length (BL), and heart girth (HG). Data collection was conducted by random sampling of female Bali cattle (1-5 years of age) in Banyumulek Techno Park. A total of 63 female Bali cattle were used in this study. The parameter of WH (distance from the ground level to the highest point of withers) and BL (distance from the shoulder joint (later tuberosity of humerus) to the pelvic bone) were measured with a measuring stick. The HG data (circumference around the chest at the fourth rib) was measured with a measuring tape. Identification of age was carried out based on the animal recording book and incisors condition. The descriptive statistic analysis (mean value, standard deviation, the coefficient of variation, minimum and maximum value) of the morphometric and BW data were performed using MS Excel 2017 program. The linear regression equation analysis and the comparison between actual and estimated BW values (Independent sample T-test) were performed using SPSS 16.0 program. The BL and BW parameters had the highest correlation coefficient (r) value (0.86). The test result showed that the predicted BW value of female Bali cattle was not significantly different with the actual BW when using G model of linear regression equation (three variables used). The G model of linear regression equation had the highest R2 value (0.84). However the R2 value in the F model with two variables (BL and HG) was also high (0.83). It can be concluded that the simple linear regression equation BW=(0.96)(WH)+(1.26)(BL)+(1.57)(HG)-284.92 are the best model to estimate the BW value of female Bali cattle in Banyumulek Techno Park.

Keywords: Bali cattle, Body measurement, Body weight, Correlation, Regression

Katalog: http://perpus.biotek.lipi.go.id/index.php?p=fstream&fid=3340&bid=15815

Disusun oleh: Ludya AB/Pustakawan

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