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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 38 Documents
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Search results for , issue "Vol 6, No 3 (2002)" : 38 Documents clear
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.
PERSEBARAN GEOGRAFI JENIS-JENIS Pimelodendron (EUPHORBIACEAE) DI MALESIA Tutie Djarwaningsih
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.v6i3.1225

Abstract

The analysis of geographical distribution of Pimelodendron in Malesia based especially on data from the revision study of Pimelodendron (Euphorbiaceae) in Malesia. An analysis of distribution indicated that the highest number of species can be recognized, i.e. in Sumatera four species P.griffithianum, P. macrocarpum. P. zoanthogyne, and P. yatesianum; Peninsular Malaysia and Borneo have three species P. griffithianum, P. macrocarpum, and P. zoanthogyne; while Celebes, Moluccas, Lesser Sunda Islands, New Guinea, Solomon Islands and tropical Australia have one species (P. amboinicum). The geographical distribution indicated that the Malesian region can be considered as the centre of distribution of Pimelodendron.
PENGARUH VARIASITOPOGRAFIMIKRO TERHADAP VEGETASI HUTAN GAMBUT DI BENGKALIS, RIAU Mustaid Siregar
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.v6i3.1216

Abstract

Peat forest vegetation in Bengkalis, Riau Province was studied using plot method. Two plots of 60 m x 40 m were placed at two locations which were different in peat physical condition (Plot 1: hemofibric, > 4 m deep, inundated; and Plot 2: hemosapric, 3 m deep, rarely inundated). The results showed that there were 79 species (diameter > 2 cm) included 49 species of trees (dbh > 10 cm) and 52 species of saplings (diameter 2-9,9 cm). Total number of species in plot 1 was higher (55 species; index diversity- H'=3.048) than that of plot 2 (39 species; H'=2.606), but, density and total basal area in plot 1 was lower than that of plot 2. Species similarity index in both plots was 19%.The most dominant tree species in plot 1 were Baccaurea macrocarpa, Ficus sp. and Palaquium hexandrum, whereas in plot 2 were Calophyllum soulattri, Ganua motleyana and Palaquium burckii. The influence of physical and peat soil nutrient on structure and species composition will be discussed in this paper.
UJI PREFERENSI TUMBUHAN INANG BEBERAPA POPULASI KUMBANG LEMBING Epilaehna. aff. emarginata (COLEOPTERA; COCCINELLIDAE; EPILACHNINAE) Sih Kahono; Liliek Endang Pujiastuti; Naoyuki Fujiyama; Susumu Nakano
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.v6i3.1221

Abstract

Epilaehna sp. aff. emarginata had been considered as a specialist on Mikania micrantha (Compositae). However, recently its oceurrence on Leucas lavandulifolia (Labiatae) was reported. Preliminary field observations of some beetle populations showed that they had different on the host plant utilizations. However, the result was not sufficient to interpret the food preference of the beetles. These experiments weremade in order to clarify those previous observations.Experiments on adult food preference was investigated under uncontrolled room conditions.Four beetle populations (Bogor, Cibinong, Klaten and Malang) were subjected to choice tests offering Mikania micrantha (Compositae) and Leucas lavandulifolia. These experiments indicated that individual beetle has similar trend on food preference within each population. Bogor and Cibinong populations preferred to feed on both M. micrantha and L. lavandulifolia while. Klaten and Malang populations preferred exclusively on L. lavandulifolia. The populations showed different food preferences on the different geographical conditions of Java.
POLA PRODUKSI AJMALISIN DARIKULTUR AGREGAT SEL Catharanthus roseus (L) G Don. DALAM BIOREAKTOR Aida Muspiah; Rizkita Rahmi Esyanti; Arbayah H Siregar; Erman Tritama
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.v6i3.1212

Abstract

A research has been conducted to optimize the rate of aeration and initial cell aggregates weight in the production of ajmalicine in Catharanthus roseus cell culture in bioreactor. Catharanthus roseus culture were grown in Zenk medium with the addition of 2.5 x 10"6 M NAA ('naphthalene acetic acid') and 10s M BAP ('benzyl amino purine'). Cell aggregates were subcultured two times before transferring 20 and 30 g/fw of cell aggregates into bioreactor, respectively, and aerated with the rate of 0.2460 L/min and 0,3405 L/min, respectively. The pattern of ajmalicine production in bioreactor were observed every 3 days for 24 days.Qualitative and quantitative analysis were conducted using HPLC connected to Cromatopac CL-7APlus. The results showed that the cell aggregates and medium contain ajmalicine. The highest concentration was obtained in combination of 30 g/fw and 0.3405 L/min aeration compare to 20 g/fw - 0,246 L/min, 20 g/fw- 0,3405 L/min, as well as 30 g/fw - 0,2460 L/min. The highest ajmalicine content in cell aggregates was obtained on the 12"d days (79.23ug/g) whilst in medium was obtained in the 18th days (981.15 ug/L).
PENGARUH UREA DAN AZOLLA SEBAGAI TANAMAN PENUTUP PADA BUDIDAYA PADI SAWAH TANAH BERKAPUR DI SEKITAR KUPANG, TIMOR, NTT Tamad Tamad
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.v6i3.1226

Abstract

The ammonia volatilization from lime soil is a very important factor of N-urea losses. Ammonia volatilization from lime soil is very high due to high buffering capacity and basalt pH of the soil. However, urea is commonly used by farmeru as N-source fertilizer on paddy field. One alternitive is Azolla as cover crop can be used to reduce ammonia volatilization from urea. Azolla as cover crop significantly reduced the pH of flodded water, increased tillers and yield up to 66%. Highest tillers production and yield occurred in the treatment of 250 kgs/ha urea, with yield 5.73 tons/ha of paddy seeds.
STATUS POPULASI DAN KONDISI HABITAT SURILI {Presbytis comatd) DI CAGAR ALAM SITU PATENGAN, JAWA BARAT Nurjaman Nurjaman; M Bismark; Sofian Iskandar
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.v6i3.1217

Abstract

Population and habitat survey was conducted in June-July 2000, at Situ Patengan Nature reserve, which aimed to record the current population data and habitat conditions. We recorded seven groups of grizzled leaf monkey/surili occurred at nature reserve, with number of 3 individual were vary between 4-8 individual each group and population density of 17/km . Sex ratio of individuals were 1:1.86, with percentage of age structures consisted of 17.95% adult male, 33.33% adult female, 25.64% juvenile, 20.51% offspring and 2.56% infant. Vegetation analysis recorded 56 species of plants found in the reserve. Some of the species were dominance, i.e. pasang (Quercus sp.), kihiur {Castanopsis javanica) and puspa {Schima walichii). Since population survey were conducted by Ruhiyat (1983) with population 2 3 density of 35 individuals/km and Adriana (1995) with population density of 3.5 individuals/km , the population density of the monkeys shown trend of decreasing. The reserve, located adjacent with some plantation areas and production forest area of Perum Perhutani, isolated the forest. This condition predicted as a potential threat to the habitat and population of the monkeys. The monkey's population will be a doomed population in the future.
PENGARUH INOKULASI SEJUMLAH ISOLAT AZOSPIRILLUM TERHADAP PERTUMBUHAN DAN SERAPAN PUPUK N PADA TANAMAN JAGUNG S Gandanegara; S Slamet; Idawati Idawati; M Lina
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.v6i3.1222

Abstract

Two greenhouse experiments had been conducted to study the effect of inoculation of some Azospirillum isolates on maize growth in sand culture and sterilized soil. In the first experiment some growth parameters were used, i.e., root length and root surface area, dry weight of root, shoot, and shoot length. Inoculation enhanced plant growth, as shown by increased of all plant growth parameters. Root length and root surface area were sensitive parameter and could be used for evaluating the effect of inoculation. The best plant perfomance achieved by inoculation with Azospirillum isolates Btl No. 8 and No. 11 and with the increase of plant biomass 24 and 53% over control, respectively. In the second experiment, six selected Azospirillum isolates were evaluated on growth, N uptake, and N contribution15 in maize plants. N isotope dilution method was used to measure the N contribution from fertilizer. Uninoculated control plants showed low dry weight and contribution from N fertilizer, 3.09 gram and 10.84%. Inoculation increased mineral nutrition expressed in higher N plant yield and N contribution from fertilizer. N plant yield ranging from 147 to 189 mg N as compared to 134 mg N in control plants. The high contribution of N fertilizer (13.21-14.35 %) achieved by inoculation with Azospirillum isolates No. 6, 7, 8, and RDCB Az 1
KARAKTERISASI DAN OPTIMASI MEDIA PRODUKSIAMILASE , DARI Aspergilus niger DAN Aspergilus clavatus Elidar Naiola
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.v6i3.1213

Abstract

Six fungi isolates belong to Aspergillus spp were isolated from various samples and their ability to produce amylase has been tested. It was founded that all isolate shown the amylolytic activities which shown the clear zone areas after pouring with iodium solution. Two isolates which name Aspergillus niger (ISO 482) dan A. clavatus (ISO 468) to be the most active compare to another. The amylase activity of two isolate was studied in media contain rice and rice brain as a carbohydrate sources. Based on lower cost and easy to reach rice brain (local waste agriculture product) were choose as the alternative media to produce enzyme amylase from Aspergillus niger (ISO 482). The activities 2 of enzyme obtain was 54,14 x 10  U/ml (one unit activity is define as micromoles of glucose produce per ml per minute). The optimiation was done at room temperature for 7 days. The result showed the activity of enzyme increase during the fermentation process, at the first 2 2 day activity was 18,77 x 10 U/ml and reached the maximum activity (91,64 x 10 U/ml) after 3 days. The optimum temperature for enzyme reaction was 40 - 50 °C, optimum pH was (pH 5.0 - 7.0) and enzyme was relatively stable under such conditions.
PENGARUH BOBOT UMBI SEBAGAI BIBIT DAN NAUNGAN TERHADAP PERTUMBUHAN KELADI TIKUS {Thyponium flageliforme (Lodd.) Bl.} Titi Juhaeti
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.v6i3.1227

Abstract

Keladi tikus Thyponium flageliforme (Lodd.) Bl. is considered as a wild plant species, because it is not fully cultivated yet. However,now adays it is quite widely used even in its wild status, because it is reported to be traditionally used as cancer cure. Due to its potential uses by the people, there is a need to be developed by cultivation in order to fulfill the demand for raw materials, both for medication and planting materials in research activities. This research was conducted to study the behaviour of keladi tikus when bring to cultivation status. The research is divided into two parts i.e: a) the effect of bulb weight as planting material and 2) the effect of shading on the growth. The result sshowed that bulb weight is not significantly affected the growth. On the 10'month after planting the parameter measured is not significantly different. Meanwhile, shading is significantly affected the plant growth. The best growth is achieved on 0% shading, but the growth on 50% shading is still good. The growth on 75% shading has significant decreased.

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