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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 7 Documents
Search results for , issue " Vol 22, No 2 (2005)" : 7 Documents clear
Identifikasi Senyawa Alkaloid dari Akar Piper sarmentosum Roxb. Ex Hunter dan Uji Aktivitasnya terhadap Jamur Candida albicans Diastuti, Hartiwi; Achmad, Sadiah; Ratnaningsih, Enny
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 2 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.2.96

Abstract

Piper sarmentosum Roxb. Ex Hunter or “Sirih duduk” has long been used for traditional medicine to cure various diseases, such as fungus infections. The investigation of the bioactive compounds of P. sarmentosum roots has not been carried out. This research was aimed to isolate the bioactive compounds from P. sarmentosum roots. The results showed that methanol extracts of P. sarmentosum roots have an activity on Candida albicans. The separation a bioactive compounds from methanol extracts of P. sarmentosum roots was performed by column chromatography, thin layer chromatography and recrystalizations. The identifications of the bioactive compounds were carried out using ultra violet spectrometry, infrared spectrometry, gas chromatography-mass spectrometry and nuclear magnetic resonance spectrometry. The results indicated that from methanol extracts, an alkaloid compound of piperoylpyrol derivative was 5-hydroxy-5- (3,4-methylenedioxyphenyl)-2-pentenoyl pyrol, could be purely isolated. Examination of bioactivity at concentration 0.10-2.50 mg/ml showed that this compound had an activity on C. albicans.
Analisis Vegetasi Hutan Dipterocarpaceae campuran di Taman Nasional Kayan Mentarang, Kalimantan Timur Yusuf, Razali
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 2 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.2.92

Abstract

A study on plant ecology by using a quadrat  method has been conducted. This study focused on species vegetation richness at some different altitudes. From the sampling area of 2.24 ha, it was identified that there are 1060 trees of 235 species belong to 121 genera of 41 families. Family of  Dipterocarpaceae which was dominated by species of shorea and the most commonest species, especially the upper layer with basal areas reached 25.33 m². Some species adapted well at the location such as Parashorea parvifolia, Shorea ovalis, Shorea johorensis, Garcinia sp, Callophyllum pulcherrimum, Castanopsis philipensis, Lithocarpus blumeanus and Quercus subsericea
Somatic Embryogenesis Formation from Immature Male Flower of Banana cv. Nangka Deswina, Puspita Deswina
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 2 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.2.97

Abstract

The plantain banana (cultivar nangka) is among the most valued crop plants in the tropical world. However, the commercially attainable yields are very low compared to other food crops. Somatic embryogenesis has the great potential for rapid and efficient regeneration of plantlets and offers opportunities for large-scale production of plant material. Genetic modification on embryogenic structure offers the opportunity to add desirable gene characteristic. The objective of this study was to evaluate the different medium combination for the induction and optimization of embryogenic formation from immature male flowers. The explants of inflorescence was sampled one month after bunch emergence and approximately 15-20 cm below the last female flower hand. Response of explants and percentage of inflorescence clusters forming nodular callus were recorded and noted. Result of the experiment showed that embryogenic callus could be induced from immature male flowers. The initiation of callus indicated of flower cluster responded to form globular embryogenic callus (49.7% ± 5.2), whereas the percentage of flower cluster responding to form nodular callus was 39.2 % ± 5.3. The highest response of explants forming nodular callus was from flower of rows 12 and 13  (60%).
Respon beberapa Varietas Padi terhadap Stress Garam Sugiyono, Sugiyono; Samiyarsih, Siti
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 2 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.2.93

Abstract

A study on the Responses of Several Rice Varieties toward Salt Stress has been carried out with a view to: 1) study the effect of salt stress on the physiological and anatomical responses of several rice varieties; 2) determine salt tolerant rice variety(ies). Research results showed that there were both physiological and anatomical changes on salt-stressed rice.  Those changes were determined by the level of salt concentration given.  The higher the concentration the more obvious the changes appeared.  There was a dramatic decrease in the total chlorophyll content of the salt-stressed leaf, coupled by a sharp decrease in the chlorophyll a/b ratio. Salt stress also resulted in the decrease in mesophyll thickness, and in turn leads to the decrease of leaf’s length and width.  In general, salt stress resulted in the decrease of plant growth, as indicated by the decrease of plant’s fresh and dry weights, eventual plant’s death was therefore imminent. The rice varieties used were sensitive to salt stress since an exposure of 50 mM NaCl has already resulted in the interference of rice growth.
Penghambatan Pertumbuhan Populasi Mikroba Bentuk Filamen dengan Sistem Pengolahan Limbah Anaerobik-Aerobik Sudiana, I Made
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 2 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.2.98

Abstract

Bulking sludge is a common phenomenon in wastewater treatment plant (WWTP), of which due to excessive growth of filamentous bacteria. Quantity and intensity of organic substrate loading, mode of reactor operation namely aerobic, frequency of anaerobic-aerobic phase determines species and population of filamentous bacteria. Poor organic substrate input and sludge only exposed with aerobic phase appeared to stimulate growth of filamentous bacteria  021 N and 041 N types, Sphaerotilus natans, Microthrix parvicella, Nostocoida limicola, Thiothrix sp. Nocardia group, Flexibacter sp., Beggiota sp. and Haliscomenobacter hydrossis. Increasing of organic loading and sludge exposed with frequent anaerobic-aerobic phase effectively  suppressed excessive growth of Type 021 N, 041 N and Microthrix parvicella. Thus result is better in sludge sedimentation indicated by a decline sludge volume index (SVI).
Penggunaan Botes AHW sebagai Alat Siram Tetes dalam Pembudidayaan Cendana di Kabupaten Belu, NTT Wawo, Albert Husein; Abdulhadi, Rochadi
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 2 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.2.94

Abstract

One of factors  that  causes the failure of the sandalwood cultivation in East Nusa Tenggara Province is drought of seedlings after planting. This research  has been conducted to study the use of Botes-AHW as an equipment of drip watering on sandalwood cultivation and to evaluate the water requirements in seedling growth after planting. The results  showed that   the use of water was more conserved by employing the Botes-AHW in sandalwood cultivation  than the traditional watering system.  The average of water requirements  in seedling growth (several months after planting)  is 10 liters  per seedling per month.
Pengaruh Keberadaan Sistem Budidaya Ikan dalam Jaring Apung terhadap Tingkat Trofik Perairan Waduk Mrica Banjarnegara Piranti, Agatha Sih; ., Christiani
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 22, No 2 (2005)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2005.22.2.95

Abstract

Organic waste from aquaculture discharged into the aquatic ecosystem can cause negative impact of this water. The occurrence of one or more plankton blooming has a toxic to other aquatic organisms including fish cultured. The purpose of this research was to know the influence of floating nets fish farming to the trophic level of the Mrica Reservoir based on the diversity of plankton. This research used a survey method in three stations (1) inlet area  (2) inside/near the location of the floating net (3) outlet area. The sampling was conducted 4 times during a month (August) with interval of a week. The major parameters were the concentration of nutrients (N dan P) and the abundance of plankton. The supporting parameters were the BOD, DO and carbon dioxide concentration, pH, temperature and light penetration. The t analysis was used to compare whether there was any difference of nutrients load among the stations. The diversity index was calculated to evaluate the quality of the ecosystem based on The Water Quality Standard followed by calculation of Saprobic Coefficient to know the trophic level of the ecosystem. The results of this research showed that the occurrence of floating nets fish farming resulted in the increased of nutrients load, and consequently the trophic level of this ecosystem is in b-meso/oligosaphrobik (light pollution). Ceratium sp dominated the Mrica Reservoir.

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