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BERITA BIOLOGI

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Published by Lembaga Ilmu Pengetahuan Indonesia

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Core Subject : Science, Agriculture,

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Articles 2,125 Documents

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ANALISIS KARBOKSIMETIL SELULOSA DARI BAKTERI Acetobacter xylinum DAN Acetobacter sp. RMG-2 [Analysis of Carboxymethyl Cellulose from Acetobacter xylinum and Acetobacter sp. RMG-2 Bacteria] Melliawati, Ruth; Djohan, Apridah Cameliawati
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.v12i3.642

Bacterial cellulose has long been manufactured and used for industrial purposes and health. Bacterial cellulose more profitable than the cellulose plants because during the manufacturing process, they do not harm the environment. The purpose of this study was to identify differences of cellulose produced by Acetobacter xylinum and Acetobacter sp. RMG-2 from that produced by plants. The study was also aimed to determine superiority of carboxymethyl cellulose (CMC) produced by those bacteria. The medium HB was prepared for the production of cellulose from both bacteria. Bacterial cellulose preparation was carried out to obtain solid fine powder, followed by manufacturing carboxymethyl cellulose through several stages to obtain CMC powder. CMC analysis was performed for both bacteria and plants targeted on the surface structure of cellulose, the density of solids, viscosity CMC and functional groups. As a result, the surface fiber cellulose plants had a wider space than fiber cellulose bacterium. The density of solids of CMC A. xylinum, A. sp. RMG-2 and plant were 30.9998 g/cm3, 0.0079 g/cm3 and 0.9978 g/cm3 respectively. Viscosity of the CMC were of 5.78 cP, 5.25 cP and 5.91 cP for each A. xylinum,A. sp. RMG-2 and plant. CMC functional groups of bacteria has met the parameters of success as indicated by the infrared spectrum since it formed a methyl group, carboxyl group and the group of sugar. Cellulose Acetobacter sp. RMG-2 and A. xylinum cellulose can replace plants through the process of compound alkalization with sodium hydroxide, because the compound can lower the level of density of pores of cellulose fibers. The CMC resulting from bacterial cellulose as good as CMC plant and had characteristics resembling CMC plant.

PERBANYAKAN TANAMAN KRISAN (Chrysanthemum morifolium) MELALUI KULTUR JARINGAN Dwimahyani, Ita; Gandanegara, S
BERITA BIOLOGI Vol 5, No 4 (2001)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Vegetatively propagated Chrysanthemum morifolium has been carried out by tissue culture.Explants derived from shoot-tip of three chrysant genotypes were used for the experiment. Shoot-tips taken from terminal branch and sterilized with 0.05% HgCb for 30 minutes and rinsed with distilled water three times.Shoot-tips were cultured on MS regeneration medium containing 1 mg/1 BAP and 0.02 mg/1 NAA.Shoot regeneration occurred 20 days after cultured.A number of tiny shoots were then transferred to fresh regeneration medium for 3 weeks and regenerated shoots were calculated.Results showed that plant genotypes had different response into plant regeneration. Genotype Ku-Ch had better response compared to other two genotypes which shown from number of plantlets produced by this genotype on the third sub-culture.

KAJIAN SUPERPARASIT DAN PREFERENSI INANG BENALU Viscum articulation Burm. f. (Viscaceae) DIKEBUN RAYA PURWODADI DAN CIBODAS [Study on superparasite and host preference of the the mistletoe Viscum articulatum Burm. f. (Viscaceae) in Purwodadi and Cibodas Botanic Gardens, Java] Sunaryo, Sunaryo
BERITA BIOLOGI Vol 10, No 1 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Superparasite is a parasitic plant that lives on other parasitic plant. Viscum articulatum Burm. f. (Viscaceae) is a parasitic species of mistletoe that grows on other parasitic species of mistletoes, thus a superparasite. In Purwodadi Botanic Gardens-LIPI, East Java V. articulatum grows on Dendrophthoe pentandra and Macrosolen tetragonus. In Cibodas Botanic Gardens-LIPI, West Java it grows on D. pentandra and M. cochinchinensis. Dendrophthoe pentandra is the most infected species.The infected mistletoes are regarded as the first stage hosts.The living collections at both Botanic Gardens parasited by the three mistletoes are regarded as the second stages host.Investation preference for first and second host stages is studied in this research.

UJI RESISTENSI BAKTERI TERHADAP HgCl, YANG DIISOLASIDARI TANAH PENAMBANGAN EMAS DIPONGKOR, JAWA BARAT Imamuddin, Hartati
BERITA BIOLOGI Vol 10, No 4 (2011)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Pollution of heavy metals mercury (Hg) is a serious problem especially in gold mining areas. This study aims to isolate the bacteria in the gold mining of Pongkor (West Java) and testing the bacterial resistance to mercury (Hg). The results showed that of the 5isolates tested, qualitatively only 2 isolates (P3 and P5) that resistant to HgCI2, each at a concentration of 30 and 40 ppm.Furthermore, up to 70 ppm concentration of HgCl2, P5 bacteria can still grow well even require a longer time lag phase in period.

KOLEKSI TUMBUHAN DARI SEMENANJUNG BOMBERAI Sambas, Edy N; Takeuchi, ayne Takeuchi; i Maturbongs, Rud A
BERITA BIOLOGI Vol 6, No 5 (2003)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

KEANEKARAGAMAN JAMUR ARBUSKULA DI PULAU ENGGANO [Diversity of Arbuscular Fungi in Enggano Island] Kramadibrata, Kartini
BERITA BIOLOGI Vol 15, No 3 (2016)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

A study on diversity of arbuscular fungi (AF) in forest area and small plantation in eastern part of Enggano island was done. Twelve species of AF were identified from this island. Eleven species had been reported from Java and associated with different kinds of plant, but three species i.e. Â Gigaspora gigantea, Glomus multicaule and Scutellospora heterogama were not common, while Sclerocystis taiwanensis is a new record for Indonesia. All species of AF recorded from this island were described by their morphological characters and their Â distribution in Enggano island were presented.

JAMUR ARBUSKULA DI TAMAN NASIONAL UJUNG KULON [Arbuscular Fungi in Ujung Kulon National Park] Kramadibrata, Kartini
BERITA BIOLOGI Vol 11, No 2 (2012)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Study on diversity of arbuscular fungi (AF) of several rizosphere of forest trees and shrub in Karang Ranjang Post, Karang Ranjang Resort,Ujung Kulon National Park (TNUK) was done. Ninety-six soil samples from 23 forest trees were collected for examining AF. Each soil sample was placed into a plastic bag and record the host plant then air dried. Part of the samples were wet sieved by using four type of soil sieves, another part were kept as pot culture in the green house for about six to twelve months, then wet sieved. There were three species of Acaulospora, six species of Glomus, one species of Sclerocytis and one species of Paraglomus associated with forest trees and shrub in TNUK. Most of species recorded from this area are common, except Glomus multicaulis.

HERITABILITAS DAN PEROLEHAN GENETIK PADA BOBOT IKAN NILA HASIL SELEKSI [Heritability and Genetic gain on Weight of Tilapia Resulted Frown Individual Selection] Nugroho, Estu; Mayadi, Lalu; Budileksono, Sigit
BERITA BIOLOGI Vol 16, No 2 (2017)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Directional-individual selection on tilapia growth had been conducted in West Nusa Tenggara Province. The base population had been constructed through di allele crossing between six tilapia strains i.e. NIRWANA, BEST, SULTANA, Citralada, JATIMBULAN and White Sleman. A total of 150 brood stock pairs were used for spawning with the ratio of female and male parent 1: 1 in net with size of 1x1x1 m. Two hundred larvae Â produced from each spawn pairs were communally reared in a pond for three months. Directional-individual selection was conducted at the size of > 50 grams. The cut-off for minimum selected fish was based on the lowest individual weight of 10% top population. The average value of heritability on body weight was 0.251 for males and 0.258 for the female population. The total value of genetic gain of body weight for four generations was 51.68% for male population and 56.78% for the female population.

PERTUMBUHAN BENIH IKAN PATIN JAMBAL (Pangasius djambal) YANG DIBERIPAKAN DENGAN KADAR PROTEIN BERBEDA [The Growth of Pangasius djambal Fingerlings Fed with Different Dietary Protein Levels] Suhenda, Ningrum; Setijaningsih, Lies; Suryanti, Yanti
BERITA BIOLOGI Vol 7, No 4 (2005)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

The experiment was conducted to evaluate the growth of Pangasius djambal which were fed with different dietary protein levels.Fifteen fingerlings averaging 6.13 g individual body weight were stocked in each of 9 fibreglass tanks filled with 30 liters of water.They were fed daily for 42 days with diets containing 30%, 35% and 40 % protein. The feed was given in crumbled form at 7% of total biomass,4 times a day and contains 2600 k.cal.DE/kg feed.The result showed that feeds with different protein content gave qudratic respon curve. Maximum values for protein retention (36.65%) were obtained with feed containing 34.14 % protein.The feed with 35% protein content gave the lowest (78.12%) lipid retention. Feed conversion ratio (1.31-1.36), daily growth rate(3.64-3.82%) and protein efficiency ratio (2.05 - 2.29) were not different among treatments.The survival rates 100% were the same for all treatments.It is suggested that feed with protein content 35% and 2600 K. cal DE/ kg feed can be used in intensive culture of Pangasius djambal fingerlings to attain the best growth and suvival rate.

PENGARUH PEMUPUKAN BERIMBANG TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KENTANG (Solatium tuberosum L.) VARIETAS GRANOLA Edi, Syafri; Endrizal, Endrizal
BERITA BIOLOGI Vol 10, No 6 (2011)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v10i6.1935

Potato is one of the main vegetables in Kerinci District. Development of potato plants is supported by the availability of land, agro ecosystem, labor and market opportunities as well as conductive local government policies. Potato farmers do not fully implementing the recommended farming technologies, such as the use of good seed, balanced fertilizer, crop rotation, pest control, harvesting and post harvest, so the production and reception of farmers is still low. The research took place in Mount Seven Village, Pelompek Kerinci District, Jambi Province which is background by agro-ecosystem dryland upland wet climate (LKDTIB), with soil type andisol at an altitude of 1400 m above sea level. The study aimed to see the effect of balanced fertilization on the growth and yield of potato. Potato used is Granola variety fourth generation derived from the Parent Seed Potato Institute in Kayu Aro. Assessments carried out from February until July 2008, with the treatment as follows: Introduction Package (A): SP-36 450 kg, 200 kg Urea, ZA 200 kg, 300 kg of KC1, NPK 100 kg and 10,000 kg of organic fertilizer/ha. Farmers Package (B): SP-36 750 kg, 400 kg Urea, 250 kg of KC1, and 400 kg NPK /ha. Fanners Package (C): SP-36 600 kg, 300 kg ZA, KC1 300 and 400 kg NPK /ha. The results showed that Package (A) gives the results of 24,320 kg /ha, higher than package (B) with the results of 18,240 kg/ha, while the Fanners Package (C) get the 19,520 kg/ha. High yield Package (A) is supported by the controlled growth of plants, the intensity and the population of pests and diseases and relatively more yield components than Package(B) and Package (C).

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