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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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DINAMIKA HUTAN DI LONG SEI BARANG, APO KAYAN KALIMANTAN TIMUR HERWASONO SOEDJITO
BERITA BIOLOGI Vol 2, No 8 (1984)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v2i8.1412

Abstract

Hutan tropika mempunyai peianan penting untuk kehidupan manusia, dan menurnt Jacobs (1980) terdapat 12 pokok kepentingan. Tidak dapat dipungkiri bahwa penebangan hutan telah menyebabkan timbulnya bermacam-macam efek negatif (Kartawinata 1977).Perusakan hutan ini, tragisnya, terutama disebabkan oleh kegiatan manusia itu sendiri. Perubahan ekosistem hutan ini, bila tidak mendapat gangguan lebih lanjut akan kembali lagi ke keadaan hutan aslinya. Menurut Ewel (1980), tumbuh kembali dan daya lenting dari hutan tropika dataran tinggi adalah lambat, bahkan mungkin tidak akan kembali lagi setelah adanya penggundulan hutan. Tetapi Hartshorn (1980) menaksir bahwa hutan tropika akan berbalik rata-rata 75 - 150 tahun. Hal ini menunjukkan hal baru dimana temyatu irutan tropika lebih sangat dinamis, tidak seperti perkiraan terdahulu
IDENTIFIKASI KERAGAMAN GENETIK ANTARA PELITA I/I DAN ROJOLELE MENGGUNAKAN MARKAH RAPD Ishak Ishak
BERITA BIOLOGI Vol 5, No 1 (2000)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v5i1.1095

Abstract

The study of genomic diversity in molecular level on two sub-species i.e indica andjavanica rice types were represented by cv.Pelita 1/1 and Rojolele respectively.Javanica called padi bulu due to long aunt on the grain. Polymerase Chain Reaction (PCR)with 17 primers have been used for detecting genomic variation between these two sub-species.Results of experiment indicated that 12 out of 17 primers showed polymorphic DNA.This study would assist plant breeder to decide,whether to improve rice quality through crossing between javanica and indica is necessary.
KERAGAMAN KERAPATAN KAYU BATANG DAN CABANG KOMUNITAS POHON DI HUTAN GUNUNG PAPANDAYAN, JAWA BARAT Eka Fatmawati Tihurua; Endah Sulistyawati
BERITA BIOLOGI Vol 18, No 2 (2019)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v18i2.3519

Abstract

Wood density is the functional character which has important role in the function of ecosystem. Stem and branch wood density have different trait and effect on its ecosystem processes. The objectives of this research are to know the diversity of stem and branch wood density and to analyze whether branch wood density could be used to estimate stem wood density in the Mount Papandayan. Six plots of 0.1 ha at different sites (three plots each in interior and edge forest) were established. Branches were collected from trees with diameter at breast height larger than 10 cm, while stem wood density data were obtained from some wood density sources. Research results showed that stem wood density ranges were 0.35–0.82 g/cm3, while branch wood density ranges were 0.33–0.61 g/cm3. Average of branch wood density was lower (0.48 ± 0.09 g/cm3) than stem wood density (0.61 ± 0.1 g/cm3). Linear regression analysis indicated that branch wood density could be used to estimate stem wood density of trees in Mount Papandayan which is showed by R2 value and correlation coefficient of 0.28 and 0.55 (p value < 0.001) respectively. 
IDENTIFIKASI GEN TERMOASIDOFILIK ALKOHOL 1 DEHIDROGENASE PADA Bacillus sp-Pjv Yulia Atika MS; I Made Artika; Novik Nurhidayat
BERITA BIOLOGI Vol 14, No 1 (2015)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v14i1.1872

Abstract

One of the constrains in the conversion process of biomass to bioethanol is the unoptimum technology for the conversion process.One of the causes is the difference between optimum temperature for enzymatic hydrolytic saccharification and for fermentation.Enzymatic hydrolysis requires high temperature and acidic pH, while fermentation operates at mild condition.Hence, thermophilic fermentative microbes are needed so that simultaneous saccharification and fermentation processes can be carried out.Alcoholdehydrogenase(ADH), an enzyme functions in the final step of fermentation, catalyzes reduction of acetaldehydeto ethanol so that it being one of indicator fermentative microbial.Protium javanicum, a typical fruit from Lombok grow at high temperature and has sour taste so that it predicted has a thermo acidophilic ADH.This study was aimed toidentify gene encoding ADHin Protiumjavanicum(Pjv) microbial isolates.ADH gene identification was carried out by DNA amplification using spesific adh primers inqPCR machine. Results showed that all isolates tested had adh gene and that of Bacillus sp-Pjv was the most efficiently amplified. Results of fermentationtest also showed that the Bacillus sp-Pjv isolate was a better ethanol-producer than the others.
ISOLAT-ISOLAT KHAMIR DARI MINUMAN TRADISIONAL LARU DI NTT M Rahmansyah; A Kanti
BERITA BIOLOGI Vol 4, No 5 (1999)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v4i5.1244

Abstract

Sixteen isolates of yeast were collected from Law fa fermented palm sap or syrup which were tapped from palm infbrescence stalk of Borassus flabellifer L). Physiological performances were tested according to Bamett method for assimilation of some sources of carbon, nitrogen and cycloheximide. Based on the percentage of discrepancy, 6 isolates have been identified. The isolates were respected in high analogical affinity and identified as Arxula adeninovoras (93%), Lipomyces tetraspows (100%), Rhodotorula mucilaginosa (97%), Saccharomyces cerevisae (95%), Schwanniomyces occidentalis var. occidentalis (96%) and Pichia anomala (99%). The yeast that usually found in food fermentation was P. anomala, R. mucilaginosa and S. cerevisiae. The others yeast have great opportunity as indigenous ones.
PERKEMBANGAN OOSIT IKAN PATIN SIAM, Pangasianodon hypophthalmus Sauvage, 1878 (PANGASIIDAE; SILURIFORMES) Evi Tahapari; Bambang Iswanto
BERITA BIOLOGI Vol 10, No 3 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v10i3.748

Abstract

Pangasianodon hypophthalmus is an introduced species of fish culture and fisheries resources in Indonesia. Reproductive biology aspects, e.g. maturity, plays an important role on the fisheries management. There was no detail information of oocytes development of P. hypophthalmus. The aim of this study is to find out the detail of its oocytes development through the observation of whole oocytes and ovarian histological slides microscopically. The results showed that the rhythm of oocyte development of P. hypophthalmus was grouped synchronism, assigned by the presence of two oocyte groups in the mature females, i.e. the large and maturing oocytes which would be spawned soon, and the small ones as the stock and still unyolked for the next spawning. The oocyte development could be devided into five stages, i.e. stage 1 (chromatin nucleolar and perinucleolar) with oocytes diameter less than 300 urn, stage 2 (yolk vesicles and cortical alveolar) with oocytes diameter of 230-660 urn, stage 3 (yolk granules) with oocytes diameter of 430-1,100 urn, stage 4 (migratory nucleus and hydrated) with oocytes diameter of 950-1,260 urn, and stage S (atretic) with oocytes diameter less than 800 m
STRUKTUR DAN KOMPOSISI JENIS TUMBUHAN HERBA DAN SEMAI PADA HABITAT SATWA HERBIVOR DISUAKA MARGA S ATWA CIKEPUH,SUKABUMI, JAWABARAT Asep Sadili
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.v10i1.2050

Abstract

The research was conducted to study the structure and composition of herbaceous and seedling communities (understorey species)occurred on herbivore habitat within Cikepuh wildlife sanctuary. A series of 25 plots of 1 m x 1 m each with an interval of 5 m were used to establish a species-area relationship. The proportion (percentage) of canopy (leaf) coverage of each species occurred within the sampling plots to the sampled soil surface area was measured. A total of 54 species belonging to 47 genera and 29 families occurred in the 25 plots develoved, with the species diversity index (value) of 2.09 using the Shannon Wiener formula. Nine species were categorized as herbaceous plants (16.67 %) while the other 45 species were categorized as seedlings (83.33 %). The average density measured was 39 individuals/m or c. 386.400 individuals/ha. The most dominant family is Euphorbiaceae (possessing 5 diffrent species) while the most dominant species is Urochloa subquadripara (Poaceae) with and importance value of 96.08%.
PENGARUH PEMBERIAN BERBAGAI TINGKAT BIJI PHASEOLUS LUNATUS DALAM RANSUM TERHADAP PERTUMBUHAN ANAK AYAM KAMPUNG. SRI HANDINI; SRI PARYANTI WALUYO
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.v3i7.1380

Abstract

S. HANDINI & S.P. WALUYO. 1987. Effect of level of Phaseolus lunatus seeds in the ration on the native chicken growth. Suppl. Berita Biologi 3 : 56- 60- The aims of this study was to obtain the level of Phaseolus lunatus to be given in the chicken ration without affecting their growth As many as 18 D.O.C. native chickens were used in this experiment. The experiment was based on Completely Randomized Design. The level of P. lunatus used in the ration as the treatment were : RK (Q%P. lunatus-?& the control ration); R I (5% P. lunatus); R II (10%/>.lunatus); R III (15% P.lunatus) and R IV (20% P. lunatus). Data obtained were analyzed using Analysis of Variance; and the Honestly Significants Different (HSD) and Duncan test were used to test the differences.The resul showed that the treatment had high significan effect on testes weight (P< 0,01); and a significants effect on body weight gain (P <C 0,05), feed consumption (P<! 0,05) and ovarium and pancreas weight (P < 0,05).On the other hand, there was no significant effect (P >0,05) to the feed conversions, water consumption and total amount of faece blood, volume and the head, tarsus, oesophagus and drum stick weights.
Cassythafiliformis L. (Lauraceae): PARASIT PENGINVASI FORMASI PESCAPRAE DIPANTAIBANDEALIT, TN MERU BETIRI, JAWATIMUR Sunaryo Sunaryo
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.v7i4.1052

Abstract

Cassytha merupakan satu-satunya marga dari suku Lauraceae, yang semua jenis-jenis anggotanya hidup sebagai tumbuhan parasit. Sampai saat ini jenis yang dilaporkan terdapat di Indonesia adalah Cassytha filiformis. Jenis ini termasuk dalam kelompok parasit obligat,yang berarti bahwa dalam siklus hidupnya parasit ini memerlukan tumbuhan lain sebagai inangnya C filiformis merupakan tumbuhan parasit yang dapat menyerang berbagai jenis tumbuhan herba, semak, bahkan pepohonan.Didalam relung ekologinya parasit ini menyerang bagian-bagian batang, cabang, ranting juga bagian daun tumbuhan inangnya.Menyukai hidup didaerah terbuka dimana sinar matahari memberikan terpaan yang optimum. Didalam memparasiti tumbuhan
HUBUNGAN KARAKTER FENOTIPIK DAN HASIL BIJI PLASMA NUTFAH KACANG TUNGGAK [Vigna unguiculata (L.) Walp.] MENURUT ANALISIS LINTASAN Mastur Mastur; Mamik Setyowati; Dwi N. Susilowati
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.v17i2.2262

Abstract

Selection of high quality seedling through plant breeding activity can be conducted using yielded seeds, but usually it produces a low heritability. Therefore, this study was aimed to examine and analize several secondary phenotypic characters of 115 cowpea germ plasms in relation to seed yield. Relationship between secondary characters and seed yield was analyzed using path analysis. The result of path analysis showed that the number of cluster and the number of pod exhibited direct and significant effect to the seed yield of cowpea. Therefore, number of cluster and number of pod are necessary to be included as the selection criteria for breeding programme to produce high quality cowpea seedling with high yield.

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