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Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal
ISSN : 08531629     EISSN : 08531629     DOI : -
Majalah Ilmiah Biologi Biosfera : A Scientific Journal merupakan peer reviewed jurnal yang diterbitkan oleh Fakultas Biologi Universitas Jenderal Soedirman. Media ini mewadahi hasil-hasil penelitian di bidang biologi tropika yang terbit tiga kali setahun (Januari, Mei, September).
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Articles 6 Documents
Search results for , issue " Vol 24, No 1 (2007)" : 6 Documents clear
Aplikasi Paklobutrazol dan KNO3 untuk Meningkatkan Kualitas dan Kuantitas Bunga Potong Anggrek Dendrobium ‘Sarifah Fatimah’ Dwiati, Murni
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 24, No 1 (2007)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2007.24.1.150

Abstract

A study on the effect of interactions between paclobutrazole and KNO3 application on the quality and quantity of Dendrobium ‘Sarifah Fatimah’ orchid cutflower was conducted. The experiment was arranged in a Randomized Complete Block Design (RCBD) employing two factors, i.e. paclobutrazole doses (100, 150, 200 ppm) and KNO3 doses (100, 200, and 300 ppm), replicated three times respectively providing 27 experimental units. The results showed that paclobutrazole and KNO3 application had significant effect on the reproductive parameters. To accelarate flowering and higher quality and quantity of the flowers, paclobutrazole of 100 ppm were applied at 2 and 5 weeks after adaptation combined with KNO3 of 100 ppm applied twice at interval of 3 weeks after paclobutrazole application could be given. 
Penelusuran Aktivitas Antibakteri dari Kulit Akar Tumbuhan Medang Seluang (Litsea spathulata) terhadap Bakteri Uji Escherichia coli dan Shigella dysentriae Munawar, Munawar; Elfita, Elfita
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 24, No 1 (2007)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2007.24.1.152

Abstract

Screening for antibacterial activity from root bark of Litsea spathulata had been done. Antibacterial test on each fraction showed that hexane had the highest activity followed by ethyl acetate and methanol. Major compound from antibacterial active fraction had been isolated. Identification of this compound was carried out applying phytochemistry assay and spectroscopic methods, i.e. ultraviolet (UV), infrared (IR), and Gas Chromatography- Mass Spectroscopic (GC-MS). Minimum inhibiting concentration (MIC) value of the active fraction was 780 mg/mL to Escherichia coli and 860 mg/mL to Shigella dysentriae.
Compensatory Growth and Feed Utilization of Humpback Grouper, Cromileptes altivelis Receiving Preset Period of Unfed-Fed Cycle Yuwono, Edy; Sukardi, Purnama
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 24, No 1 (2007)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2007.24.1.148

Abstract

The effect of preset periods of unfed-fed cycle on growth, feed efficiency and body condition indices of humpback grouper, Cromileptes altivelis was studied. The fish receiving non-feeding/feeding cycle of 1/2 day (T1); 1/2 and 3 days alternately (T2); 1/3 day (T3); were compared to that fed daily as a control (C). Each feeding treatment was assigned to five fiberglass tanks according to a completely randomized design. All fish was weighed to obtain final weight gain at the end of the experiment. Feeding rate (FR) was calculated during feeding period throughout the experiment. At the end of the experiment all fish was weighed to obtain final fish weight. Absolute growth rate (AGR); survival; consumption; cumulative feed consumption, and feed conversion efficiency (FCE) were calculated. Data were subjected to analysis of variance and Tukey test (P<0.05). The results showed that humpback grouper Cromileptes altivelis receiving preset unfed-fed cycle elicited compensatory growth and the fish showed hyperphagia and greater feed conversion efficiency.
Profil Avifauna dalam Ekosistem Urban Kota Denpasar Surata, Sang Putu Kaler
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 24, No 1 (2007)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2007.24.1.153

Abstract

The objective of this survey was to estimate species richness and abundance of avifauna in several main habitats in urban ecosystem at Denpasar City. For these purposes 18 urban areas consisting of three types of habitats, i.e. mangrove forest, rice field, and city parks (including garden and shrub) were selected. The point count method was applied to observe birds with three-time observation in the respective urban area. Thirty-six species of birds were recorded and seven bird species were met once with one individual only. Based on Jackknife index, probably 43 bird species have been living in urban ecosystem at Denpasar City. There were five species belonging to common birds yellow-vented bulbul (Pycnonotus goiaver), spotted dove (Streptophelia chinensis), bar-winged prinia (Prinia familiaris), scaly-breasted munia (Lonchura punctulata), and olive-backed sunbird (Nectaria jugularis) which tend to live in all types of urban areas. Variance analysis showed that both Simpson (F2:17=6.330;P=0.010) and Shannon-Wiener (F2:17=12.870;P=0.001)  diversity indeces of birds in mangrove forest were significantly different from those in rice field and city park. Profil of avifauna in mangrove forest is better than that in rice field and city parks.
Xanton dari Fraksi Aktif Antioksidan Kulit Batang Kandis Gajah (Garcinia griffithii T. Anders) Elfita, Elfita; Supriyatna, Supriyatna; Bahti, Huesin H
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 24, No 1 (2007)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2007.24.1.151

Abstract

Garcinia is a large genus of polygamous trees or shrubs, distributed in the tropical Asia, Africa, and Polynesia, and is a rich source of bioactive molecules including xanthones, flavonoids, benzophenones, lactones, and phenolic acid. In the present study, an attempt was made to evaluate the antioxidant activity from stem bark of G. griffithii using radical scavenging 1,1-diphenyl-2-picryl hydrazyl (DPPH) model systems. Xanthone from antioxidant active fraction had been isolated and this compound had been identified by the use of ultraviolet (UV), infrared (IR), and proton nuclear magnetic resonance (1H-NMR) spectroscopy.
Fauna Krustasea di Perairan Kepulauan Anambas, Propinsi Kepulauan Riau Widyastuti, Ernawati
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 24, No 1 (2007)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2007.24.1.149

Abstract

Observation of crustacean fauna in Anambas Islands waters was conducted from 20 May to 4 June 2002. The selected locations were Ranap Island, Matak Island, Pemutus Island, Akar Island, and Jemaja Island. The aim of this study was to know the diversity and evenness of the crustacean species. Sampling was conducted by applying quadrant transect and other collections. Forty one species of crustaceans, representing 14 families, were collected from those selected locations including 23 species that were collected from transect area. The results showed that diversity index of the crustacean fauna was 0.65 to 0.98 and species evenness was 0.85 to 0.98. Based on the species diversity index, all those selected locations could be said as having low diversity.

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