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INDONESIA
BERITA BIOLOGI
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Arjuna Subject : -
Articles 2,125 Documents
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NITROGEN REMOVAL BYAN ACTIVATED SLUDGE PROCESS WITH CROSS-FLOW FILTRATION [Perombakan Nitrogen Menggunakan Proses Lumpur Aktif yang Dilengkapi dengan Filtrasi] Dwi Agustiyani; Takao Yamagishi
BERITA BIOLOGI Vol 10, No 1 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v10i1.2049

Abstract

The simultaneous nitrification and denitrification in a single reactor using an activated sludge with cross-flow filtration was investigated.The reactor was a Sequencing Batch Reactor (SBR), operated on three phase conditions, phase I was continuous aeration, phase II was intermittent aeration and phase III was intermittent aeration with methanol addition. The microbial properties on the nitrogen removal processes were monitored by measuring the ammonia decreasing and nitrate production rate.The denitrification rate was also calculated from N20 gas production by acetylene inhibition method.The experiment results show that the nitrification was occurred during the aeration condition, both in the phase I and II. The denitrification was occurred in the anoxic stage (phase III).The nitrate decreasing rate in the anoxic stage (phase IIIA) increased gradually reach the value of 0.19 th mg-N/1/min. on the 8 day operation. The nitrate decreasing rate increased to be 0.45 mg/l/min in the phase IIIB and reach up to 0.70 mg/l/min in the phase IIIC in which the methanol concentrations was increased from 762 mg/L to 1016 mg/L in the phase IIIB and phase IIIC, respectively. The increasing activity of denitrification resulted in decreasing the concentration of TOC in the reactor. More than 80% nitrogen removal occurred in phase III and TOC removal efficiency in phase III reach more than 90%.
PEMBUATAN RAGI DENGAN MENGGUNAKAN BEBERAPA MACAM TEPUNG SEBAGAI PEMBAWA(CARRIER) ELIDAR ELIDAR
BERITA BIOLOGI Vol 3, No 7 (1987): (Supplement)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v3i7.1379

Abstract

ELIDAR.1987.The preparation of inoculum by using various flour as subtrates or carriers Suppl. Berita Biologi. 3: 51:55. for 2 mold and 2 yest strains,the rice,glutinous rice and tapioca wates flour colud be used as a substrate better then others flour.The survival of the inoculated microorganisms in the rice,glutinous rice and tapioca waste inoculums were not significantly difference.The viable spore count in those three inoculums decreased due to th duration of storage The viability of the spores count were  104- 106 propagule/g in the early storage and then it descreased 104 propagule/g after 3 months storage 
EXCISED EMBRYO RAMBUTAN (Nephelium lappaceum L.) DAN KEPEKAANNYA TERHADAP PENGERINGAN [Desiccation Sensitivity of Rambutan (Nephelium lappaceum L.) Excised Embryo] Usep Soetisna; Lisye Iriana Zebua
BERITA BIOLOGI Vol 7, No 4 (2005)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v7i4.1051

Abstract

A study on desiccation sensitivity of rambutan (Nephelium lappaceum L.)excised embryo has been conducted.Excised embryos were desiccated into target moisture content of 30%, 25%, 20%, 15% and 10% respectively.Results shown that the critical level for moisture content was 20% with 60% viability and 7.431% per etmal growth rate and 929ms electric conduction Further study is needed as to investigate on how long the embryo will withstand subsequent storage treatments.
KARAKTERISASI KERAGAMAN GENETIK 27 GENOTIPE CABAI BERDASARKAN MARKA SSR (SIMPLE SEQUENCE REPEAT) Rerenstradika Tizar Terryana; Kristianto Nugroho; Habib Rijzaani; Puji Lestari
BERITA BIOLOGI Vol 17, No 2 (2018)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v17i2.3313

Abstract

Chili pepper (Capsicum annuum) is one of the high economical horticultural comodity in Indonesia and its genetic diversity contributes to the success of breeding programs. Simple sequence repeat (SSR) markers can be used to analyze genetic diversity among chili pepper genotypes. The aim of this research was to analyze the genetic diversity of twenty-seven genotypes of chili pepper by using 24 SSR markers. The collected data was analyzed using cluster analysis and principle coordinate analysis (PCoA). The result showed that high allele variation (4–17 alleles) was observed among chili pepper genotypes tested, with an average allele number and Polymorphism Information Content (PIC) value was 7.708 and 0.758 (0.598–0.920) respectively. All of SSR markers showed PIC value >0.5 which indicated that these markers were suitable for chili pepper diversity studies with a high differentiation and with the average value of genetic diversity was 0.78. The clustering and principle coordinate analysis showed that twenty-seven genotypes of chili pepper were divided into two groups (coefficient of similarity 0.74 in cluster analysis) indicating a high genetic variability among them. Genetic diversity analysis in this study will be useful as an initial basis of selection for appropriate parents with desired traits to assist the breeding program of chili pepper in Indonesia.
LINNEAUS'S LEGACY Systematic Challenges, Past and Present Urban Olsson
BERITA BIOLOGI Vol 8, No 4(a) (2007)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v8i4(a).1538

Abstract

Tulisan ini menyampaikan perkembangan ilmu sistimatik. Pandangan Linnaeus menyerupai pandangan Aristotle dalam hal mengelompokkan organisme mengikuti Scala Naturae yaitu berdasarkan kemiripan. Namun pendekatannya berbeda, Aristotle lebih menekankan bahwa karakter yang berkaitan dengan gaya hidup organisme seperti bentuk tubuh sangat penting untuk klasifikasi.Sedangkan menurut Linnaeus justru karakter yang tidak terlihat, tetapi sangat penting dalam mempertahankan hidup sehari-hari justru jauh lebih penting. Saat ini kita menyusun organisme berdasarkan pohon filogenetik dengan cara mengelompokkannya kedalam kelompok monofiletik atau disebut juga kelompok alami yaitu dimasukkan kedalam suku (famili), ordo dan filum.Jenis-jenis yang termasuk kelompok tersebut harus berasal dari nenek moyang yang sama.Perbedaan yang terjadi pada bentuk tubuh atau fungsi bagian tubuh dipaparkan dengan ,cladistic'.Perkembangan pesat di bidang biologi molekuler termasuk tehnik-tehnik DNA dalam beberapa dasawarsa terakhir ini sangat membantu mengurai persoalan rumit yang dijumpai dalam melakukan klasifikasi.
KOMPONEN KIMIA MINYAK ATSIRIDAUN TIGA JENIS PIPERACEAE Yuliasri Jamal
BERITA BIOLOGI Vol 6, No 3 (2002)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v6i3.1210

Abstract

Chemical analysis of leaves essential oil on three Piper species, P. malamiri, P. baccatum and P. majusculum was conducted using gas chromatography and mass spectrometry (GCMS) method.Chromatogram result showed 52, 56 and 47 peaks on leaves essential oil of P.malamiri, P.baccatum and P.majusculum respectively. Based on the peaks,it is known that isocaryofilene is the major, common and as the highest component found in the three essential oils, beside several other major components.
KERAGAMAN DAN KELIMPAHAN LEBAH SOSIAL (APIDAE) PADA BUNGA TANAMAN PERTANIAN MUSIMAN YANG DIAPLIKASI PESTISIDA DI JAWA BARAT Sih Kahono; Erniwati Erniwati
BERITA BIOLOGI Vol 13, No 3 (2014)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v13i3.660

Abstract

Study of diversity and abundance of social bees (Apidae) in the pesticide-applied seasonal crops were carried out for nine species of crops in a lowland area, Dramaga, Bogor and on 17 species of crops ina highland area, Lembang, Bandung, both in the province of West Java. Two species of honey bees (Apis cerana and A. dorsata) and one species of stingless bee (Trigonalaeviceps) were recorded from the lowland crops,while only A. cerana was found in the highland crops. The most abundant bee species on both low and highland was the honey bee A. cerana. The number of A. cerananests and T. laevicepsnests in the surroundings of the study sites were relatively high. Colony members of both bee species were very active to collect nectar and pollen from flowers in non-pesticide-applied sites; however, the density of bees visiting flowers in pesticide-applied seasonal crops in both lowland and highland were relatively low.
PENGARUH MUTAGEN ETIL METAN SULFONAT (EMS) TERHADAP PERTUMBUHAN KULTUR IN VITRO ILES-ILES {Amorphophallus muelleri Blume) Yuyu S Poerba; Aryani Leksonowati; Diyah Martanti
BERITA BIOLOGI Vol 9, No 4 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v9i4.2013

Abstract

Amorphophallus muelleri Blume (Araceae) is one of 27 Amorphophallus species occur wild in Indonesia (Sumatera, Java, Floresand Timor). The species is valued for its glucoman content for use in food industry (heathy diet food), paper industry, pharmacyand cosmetics. The cultivation of A. muelleri is hampered by limited genetic quality of seed. The species is triploid (2n=3x=39),the seed is developed apomictically. and pollen production is low. The species is only propagated vegetatively. This may explainthat the species is difficult to breed conventionally and genetic variabillity in the exiting landaraces cultivars is rather limited.Induced mutation using ethyl methan sulfonate is one of techniques to increase genetic variation. The present research is aimed todetermine Lethal Dosage (LD) 50% and 75% of EMS and to study effects of EMS on growth of A, muelleri in vitro cultures for usein induced mutation program. Results of the experiment showed that LD-50 and LD-75 was observed at 0.875% EMS and 0.5%EMS. respectively. Number of shoot, and percentage of rooting culture were decreasing as EMS level concentration increases.
TUMPANG TINDIH "NICHE" IKAN DI MUARA CI SIIH DAN CI JARALANG SELAT SUNDA JAWA BARAT D.I. HARTOTO; N. TRISNANINGSIH; I. RACHMATIKA
BERITA BIOLOGI Vol 3, No 3 (1985)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v3i3.1347

Abstract

D.I. HARTOTO, N. TRISNANINGSIH & I.RACHMATIKA. 1985. Fish niche of Ci Siih and CiJaralang estuaries, Sunda strait, West Java. Berita Biologi 3 (3) : 77 - 83. - A study of the fish community of Ci Silih and Ci Jaralang estuaries, Sunda Strait, West Java was conducted during the peak of dry season, August 1982. This study was aimed to apply Hutchinsonian niche theory into operational level and to reveal the stage of succession processes on the two estuarine fish communities.The study shows that type of refuges were more variate in Ci Jaralang than in Ci Siih and diversity of physical structure of spatial habitat resources affected a more diverse type of refuges. Means of absolute spatial niche breadth as a measure of concentration (?i) and uncertainty(?i) are larger in Ci Siih than in Ci Jaralang.Those facts indicate that fish species in Ci Siih were more dispersed in occupying the spatial habitat resources available. The larger (?i) value indicate that these two fish communities were still in early stages in their succession. The significantly similar means of absolute spatial niche overlap shows that the intensity of resources sharing on these two communities are nearly similar and are quite intensive.
KOMPOSISI KIMIA MINYAK ATSIRI Melodorum cylindricum (Maing. ex Hook.f & 1 Thorns), Litseajirma (Blume) Hook.f., Fl. Brit. Ind. DAN Callistemon lanceolatus D.C. Yuliasri Jamal
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v9i6.848

Abstract

Steam distillation of Melodorum cylindricum leaves (176 gram), Litsea firma leaves (295 gram), L firma stem bark (1,590 gram) and Callistemon lanceolatus leaves (300 gram) yielded 0.15%, 1.68%, 0.23% and 0.4% essential oils respectively.The oils were analyzed using GC-MS methods. The results identified 71 components from the leaves of M. Cylindricum which p-myrcene is the highest (12,56%). Leaves and stem bark of L. firma contained 20 and 24 components which 2-undecanone (34,95%) and undecanone (29,57%) as the highest major components. The essential oil of C. lanceolatus identified 24 components and 1,8 cineol is the major component with the highest content, 67.37%.

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