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Ivandini Tribidasari A.
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Makara Journal of Science
Published by Universitas Indonesia
ISSN : 23391995     EISSN : 23560851     DOI : https://doi.org/10.7454/mss
Core Subject :
Makara Journal of Science publishes original research or theoretical papers, notes, and minireviews on new knowledge and research or research applications on current issues in basic sciences, namely: Material Sciences (including: physics, biology, and chemistry); Biochemistry, Genetics, and Molecular Biology (including: microbiology, physiology, ecology, taxonomy and evolution); and Biotechnology.
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Articles 14 Documents
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Search results for , issue "Vol. 9, No. 1" : 14 Documents clear
PERTUMBUHAN Chlorella spp. DALAM MEDIUM EKSTRAK TAUGE (MET) DENGAN VARIASI pH AWAL Prihantini, Nining Betawati; Putri, Berta; Ratna, Ratna
Makara Journal of Science Vol. 9, No. 1
Publisher : UI Scholars Hub

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Abstract

The Growth of Chlorella spp. in Tauge Extract Medium (TEM) with Various Initial pH. Research on the effect of tauge extract medium initial pH value on Chlorella Beijerinck cell densities at peak condition had been done. The research was an experimental study with complete random design with 5 treatments (tauge extract medium with initial pH 5,6,7,8, and 9). At peak condition the highest cell density (5.677.625 sel/ml) was occured in medium with initial pH 7 and the lowest (3.374.100 sel/ml) in medium with initial pH 5. Anova test shown that there was an effect (p value>0,05) of tauge extract medium initial pH value on Chlorella cell densities (cell/ml) at peak condition. Multiple comparison test showed that mean of cell numbers of Chlorella differed among treatments (p value>0,05) except between media with initial pH 8 and 9.
PENGARUH PERBEDAAN LOKASI MENCARI MAKAN TERHADAP KERAGAMAN MANGSA TIGA JENIS KUNTUL DI CAGAR ALAM PULAU DUA SERANG: Casmerodius albus, Egretta garzetta, Bubulcus ibis Elfidasari, Dewi
Makara Journal of Science Vol. 9, No. 1
Publisher : UI Scholars Hub

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Abstract

Prey diversity influenced by the different or foraging areas for three species herons in Cagar Alam Pulau Dua Serang. This research is to know the influenced of foraging areas to prey diversity for three species herons in Cagar Alam Pulau Dua Serang, Banten Province. This research have been done at feeding area for the herons around Cagar Alam Pulau Dua. The data were from film shooting use Focal Observation Methods, while the film shooting analyze use scan sampling methods. It’s explain that Casmerodius albus and Egretta garzetta have preferency to select the mudflat and fisheries around CAPD as foranging location because they preferency to select fish as they main prey. Bubulcus ibis who select to using rice-field and grassland as a foraging location have preferency to select insects as a main prey. The selection of foraging location for three species herons are depend on the spesific kind and size of preys for them. The preferency for Casmerodius albus to feedinginest is mudflat with the mayority prey are big fish, with the size of more than 15 cm. Egretta garzetta have preferency to select fisheries because they main prey are fish with size of about 3-5 cm. Bubulcus ibis is prefer to feeding in grassland because they eat the insect with the preferences prey size smaller than 3 cm.
ISOLASI DAN IDENTIFIKASI BAHAN AKTIF PENYEBAB PEMANCARAN CAHAYA PADA BAKTERI Photobacterium phosphoreum YANG DIISOLASI DARI CUMI LAUT JEPARA INDONESIA Ratnawulan, Ratnawulan; Pringgenis, Delianis; Arif, Idam
Makara Journal of Science Vol. 9, No. 1
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Isolation and Identification of Active Compound Cause Light Emmitting of Bacterial Photobacterium phosphoreum Isolated from the Indonesia Jepara Marine Squid. This research carried out to study the bioluminescence process of bacterial Photobacterium phosphoreum isolated from Indonesia marine squid. The method used in the present study involved isolation, purification, electrophoresis, and the absorbance and light intensity measurement. This result show that the luciferace enzyme of bacterial Photobacterium phosphoreum or called LBPP catalyzes the emission of visible light from the reaction of reduced flavin mononucleotide (FMNH2 ), molecular oxygen (O2 ), and an aldehyde (RCOH). The electrophoresis data show that LBPP comprised of two different subunits a and b with 41kD and 38 kD molecular weights. The absorb pattern showed that the bioluminescence process centered around 516 nm and are consistent with the fluorescence data. This result concluded that the excitation state formed after LBPP bind subtracts and the ground state formed after LBPP releases product and visible light.
SEISMOGRAM CONSTRUCTION TO FIT THE RECORDED B032593C EARTHQUAKE, JAPAN ON OBSERVATION STATION BFO, GERMANY Santosa, Bagus Jaya
Makara Journal of Science Vol. 9, No. 1
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In this research the model of earth layers between earthquake's epicenter in Hokkaido Japan and observation station in Black Forest of Observatory (BFO), Germany is investigated. The earth model is 1-D that represents the average speed model. The earth model is obtained by seismogram comparison between data and synthetic seismogram in time domain and three components simultaneously. Synthetic Seismogram is calculated with the Green's function of the Earth by MINor Integration (GEMINI) program, where program's input is initially the earth model IASPEI91, PREMAN and also the Centroid Moment Tensor (CMT) solution of the earthquake. A Butterworth low-pass filter with corner frequency of 20 mHz is imposed to measured and synthetic seismogram. On seismogram comparison we can find unsystematic discrepancies, covering the travel time and waveform of all wave phases, namely on P, S, SS wave and surface wave of Rayleigh and Love. Solution to the above mentioned discrepancies needs correction to the earth structure, that covering the change of earth crust thickness, the gradient of bh and value of zero order coefficient in bh and bv in upper mantle, to get the fitting on the surface wave of Love and Rayleigh. Further correction to accomplish the discrepancies on body waves is conducted on layers beneath upper mantle down to depth of 630 km, where a little change at speed model of P and S wave is carried out. The number of oscillation amount especially on Love wave is influenced by earth crust depth earth. Good fitting is obtained at phase and amplitude of Love wave, but also at amplitude of some body wave too. This effect is not yet been exploited for the determination of moment tensor
EFEKTIFITAS METODE ADITIF SPLINE KUADRAT TERKECIL PARSIAL DALAM PENDUGAAN MODEL REGRESI Bilfarsah, Ahmad
Makara Journal of Science Vol. 9, No. 1
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Efectivity of Additive Spline for Partial Least Square Method in Regression Model Estimation. Additive Spline of Partial Least Square method (ASPL) as one generalization of Partial Least Square (PLS) method. ASPLS method can be acommodation to non linear and multicollinearity case of predictor variables. As a principle, The ASPLS method approach is cahracterized by two idea. The first is to used parametric transformations of predictors by spline function; the second is to make ASPLS components mutually uncorrelated, to preserve properties of the linear PLS components. The performance of ASPLS compared with other PLS method is illustrated with the fisher economic application especially the tuna fish production.
SUSPENSI DAN ENDAPAN SEDIMEN DI PERAIRAN LAUT JAWA Helfinalis, Helfinalis
Makara Journal of Science Vol. 9, No. 1
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Suspension and Sedimentation Studies in Java Sea Water. Oceanography study of the Java Sea Water has been done on September 2004. The lowest total suspended solid in the water surface was 0.018 gr/l at the south part of Kalimantan and the highest was 0.053 gr/l at the west part of South Kalimantan. The lowest total suspended solid values in the medium sea level was about 0.023 gr/l at the west part of Pancel and reaches the value of 0.051 gr/l at the west part of South Kalimantan. At the bottom of deep sea level, the lowest total suspended solid value were about 0.022 gr/l at the west by south of South Kalimantan and the highest was found in the west part of South Kalimantan which has the value of 0.051 gr/l. The sediment has a yellowish brown color in the depth of several centimeters which indicates of highly sedimentation supply from the river. Sediment at the bottom of South Kalimantan waters which is located near the land was found more like a mud on the surface and silt on the inside
PERGERAKAN PENDUDUK KOTA DEPOK MENUJU KE TEMPAT BEKERJA TAHUN 2001 Sitanala, Frans
Makara Journal of Science Vol. 9, No. 1
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Depok’s Resident Movement to Their Workplace in 2001. The data of commuters from Depok town were taken from six Depok’s subdistricts to get the information of their work location, their transportation and the interaction between Depok town with DKI Jakarta, Bogor, Tangerang, Bekasi regions (Botabek). The results show that majority the commuters went to DKI Jakarta as their workplace which was dominant in all subsdistrics. The commuters dominantly used non-train public transports. The strong interaction were happened between Depok town and South Jakarta and East Jakarta, the weak one was happened between Depok town with Tangerang
PERTUMBUHAN Chlorella spp. DALAM MEDIUM EKSTRAK TAUGE (MET) DENGAN VARIASI pH AWAL Prihantini, Nining Betawati; Putri, Berta; Ratna, Ratna
Makara Journal of Science Vol. 9, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Growth of Chlorella spp. in Tauge Extract Medium (TEM) with Various Initial pH. Research on the effect of tauge extract medium initial pH value on Chlorella Beijerinck cell densities at peak condition had been done. The research was an experimental study with complete random design with 5 treatments (tauge extract medium with initial pH 5,6,7,8, and 9). At peak condition the highest cell density (5.677.625 sel/ml) was occured in medium with initial pH 7 and the lowest (3.374.100 sel/ml) in medium with initial pH 5. Anova test shown that there was an effect (p value>0,05) of tauge extract medium initial pH value on Chlorella cell densities (cell/ml) at peak condition. Multiple comparison test showed that mean of cell numbers of Chlorella differed among treatments (p value>0,05) except between media with initial pH 8 and 9.
PENGARUH PERBEDAAN LOKASI MENCARI MAKAN TERHADAP KERAGAMAN MANGSA TIGA JENIS KUNTUL DI CAGAR ALAM PULAU DUA SERANG: Casmerodius albus, Egretta garzetta, Bubulcus ibis Elfidasari, Dewi
Makara Journal of Science Vol. 9, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Prey diversity influenced by the different or foraging areas for three species herons in Cagar Alam Pulau Dua Serang. This research is to know the influenced of foraging areas to prey diversity for three species herons in Cagar Alam Pulau Dua Serang, Banten Province. This research have been done at feeding area for the herons around Cagar Alam Pulau Dua. The data were from film shooting use Focal Observation Methods, while the film shooting analyze use scan sampling methods. It’s explain that Casmerodius albus and Egretta garzetta have preferency to select the mudflat and fisheries around CAPD as foranging location because they preferency to select fish as they main prey. Bubulcus ibis who select to using rice-field and grassland as a foraging location have preferency to select insects as a main prey. The selection of foraging location for three species herons are depend on the spesific kind and size of preys for them. The preferency for Casmerodius albus to feedinginest is mudflat with the mayority prey are big fish, with the size of more than 15 cm. Egretta garzetta have preferency to select fisheries because they main prey are fish with size of about 3-5 cm. Bubulcus ibis is prefer to feeding in grassland because they eat the insect with the preferences prey size smaller than 3 cm.
ISOLASI DAN IDENTIFIKASI BAHAN AKTIF PENYEBAB PEMANCARAN CAHAYA PADA BAKTERI Photobacterium phosphoreum YANG DIISOLASI DARI CUMI LAUT JEPARA INDONESIA Ratnawulan, Ratnawulan; Pringgenis, Delianis; Arif, Idam
Makara Journal of Science Vol. 9, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Isolation and Identification of Active Compound Cause Light Emmitting of Bacterial Photobacterium phosphoreum Isolated from the Indonesia Jepara Marine Squid. This research carried out to study the bioluminescence process of bacterial Photobacterium phosphoreum isolated from Indonesia marine squid. The method used in the present study involved isolation, purification, electrophoresis, and the absorbance and light intensity measurement. This result show that the luciferace enzyme of bacterial Photobacterium phosphoreum or called LBPP catalyzes the emission of visible light from the reaction of reduced flavin mononucleotide (FMNH2 ), molecular oxygen (O2 ), and an aldehyde (RCOH). The electrophoresis data show that LBPP comprised of two different subunits a and b with 41kD and 38 kD molecular weights. The absorb pattern showed that the bioluminescence process centered around 516 nm and are consistent with the fluorescence data. This result concluded that the excitation state formed after LBPP bind subtracts and the ground state formed after LBPP releases product and visible light.

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