cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Ivandini Tribidasari A.
Contact Email
ivandini.tri@sci.ui.ac.id
Phone
+622129120943
Journal Mail Official
editor_mss@ui.ac.id
Editorial Address
Directorate of Research and Community Engagement UNIVERSITAS INDONESIA UI Campus, Depok 16424 Indonesia
Location
Kota depok,
Jawa barat
INDONESIA
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.
Arjuna Subject : -
Articles 880 Documents
 53   54   55   56   57 
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.
EFEKTIFITAS METODE ADITIF SPLINE KUADRAT TERKECIL PARSIAL DALAM PENDUGAAN MODEL REGRESI Bilfarsah, Ahmad
Makara Journal of Science Vol. 9, No. 1
Publisher : UI Scholars Hub

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

Abstract

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.
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
Publisher : UI Scholars Hub

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

Abstract

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
PERGERAKAN PENDUDUK KOTA DEPOK MENUJU KE TEMPAT BEKERJA TAHUN 2001 Sitanala, Frans
Makara Journal of Science Vol. 9, No. 1
Publisher : UI Scholars Hub

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

Abstract

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
SUSPENSI DAN ENDAPAN SEDIMEN DI PERAIRAN LAUT JAWA Helfinalis, Helfinalis
Makara Journal of Science Vol. 9, No. 1
Publisher : UI Scholars Hub

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

Abstract

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
Modification of Zeolite Made from Coal Fly Ash with TiO2: Effect of Aging Time on Physical and Optical Properties Kusumawardani, Linda Jati; Iryani, Ani; Sinaga, Ennita Lusiana
Makara Journal of Science Vol. 27, No. 1
Publisher : UI Scholars Hub

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

Abstract

The high levels of metal oxides, SiO2, and Al2O3 give coal fly ash the potential for development into zeolite. Zeolite was prepared from fly ash by combining alkaline fusion with hydrothermal treatment. Using this method results in a high surface area, high mechanical properties, and high crystallinity of the sample. Zeolite as a product is modified by TiO2. This study was intended to determine the effect of the operating process in zeolite synthesis from coal fly ash on the types and properties of zeolite and the effect of the aging time of TiO2-modified zeolite at 14, 16, and 20 h. Investigating its physical and optical properties shows that the product contains zeolite X as the major phase. The zeolite X itself contains 96% crystallinity and a specific surface area of 164.78 m2/g. Meanwhile, TiO2/zeolite increases the light absorption in the visible region. Diffuse reflectance spectroscopy showed that a 14 h aging time results in the lowest band gap energy of 2.50 eV and the largest surface area of 189.483 m2/g. X-ray diffraction characterization found that TiO2/zeolite is an anatase crystal (~9 nm) with 99% crystallinity. A pilot examination of the photodegradation performance of the TiO2/zeolite nanocomposite was evaluated using 5 mg/L methylene blue and compared with that of zeolite alone.
DOMINASI CYANOBACTERIA PADA MUSIM PERALIHAN DI PERAIRAN LAUT BANDA DAN SEKITARNYA
Makara Journal of Science
Publisher : UI Scholars Hub

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

Abstract

Domination of Cyanobacteria at Transition Monsoon around Banda Sea Area. Banda Sea had affected by monsoon factor, this condition also influenced fitoplankton condition, but information about fitoplankton condition especially Cyanobacteria group still not complete yet. Therefore had done the researched about fitoplankton in October 1998 and November 1999, that months is regarded as vice of transition monsoon. Fitoplankton samples were taken from the surface to 200 m depth to known the abundant, composition, and distribution of Cyanobacteria. The results showed that the abundant of Trichodesmium erahtraeum varied between 0.02-1.2 x 102 coloni m-3, the highest vale found in 100 m depth and the lowest in 200 m depth. The abundance of Trichodesmium thiebautii varied between 0-8.8 x 102 cel m-3. Distribution of Trichodesmium erythraeum found until 50 m depth, their abundance high relative, this condition caused by nitrate concentration (r2 =28,30 %) and temperature (r2 =17,30 %). Based on their abundance, diversity, evenness and distribution Trichodesmium eryhtraeum dan Trichodesmium thiebautii dominated in transition monsoon.
DOMINASI CYANOBACTERIA PADA MUSIM PERALIHAN DI PERAIRAN LAUT BANDA DAN SEKITARNYA Sediadi, Agus
Makara Journal of Science Vol. 8, No. 1
Publisher : UI Scholars Hub

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

Abstract

Domination of Cyanobacteria at Transition Monsoon around Banda Sea Area. Banda Sea had affected by monsoon factor, this condition also influenced fitoplankton condition, but information about fitoplankton condition especially Cyanobacteria group still not complete yet. Therefore had done the researched about fitoplankton in October 1998 and November 1999, that months is regarded as vice of transition monsoon. Fitoplankton samples were taken from the surface to 200 m depth to known the abundant, composition, and distribution of Cyanobacteria. The results showed that the abundant of Trichodesmium erahtraeum varied between 0.02-1.2 x 102 coloni m-3, the highest vale found in 100 m depth and the lowest in 200 m depth. The abundance of Trichodesmium thiebautii varied between 0-8.8 x 102 cel m-3. Distribution of Trichodesmium erythraeum found until 50 m depth, their abundance high relative, this condition caused by nitrate concentration (r2 =28,30 %) and temperature (r2 =17,30 %). Based on their abundance, diversity, evenness and distribution Trichodesmium eryhtraeum dan Trichodesmium thiebautii dominated in transition monsoon.
STRUKTUR KOMUNITAS TERIPANG (HOLOTHUROIDEA) DI BEBERAPA PERAIRAN PANTAI KAI BESAR, MALUKU TENGGARA Yusron, Eddy; Widianwari, Pitra
Makara Journal of Science Vol. 8, No. 1
Publisher : UI Scholars Hub

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

Abstract

Holothurian (Holothuroidea) Community Structure in Some Coastal Waters of Kai Besar Island, South-East Maluku. During October and November 1990 the holothurian community inhabiting littoral areas was assessed at five locations : Borang, Ohoiwait, Nuwahan, Wahadan and Kurit Wur. This involved five ecological indices: density, species richness, diversity, evenness and similarity. It was revealed that the holothurian community consisted of 14 species in which five among them occurred in all locations at higher densities: Holothuria edulis, H. scabra, H. nobilis, H. atra and Stichopus chloronatus. Small variations of the ecological indices at all locations may indicate that the community characteristics at the five locations were relatively similar.
PENAPISAN GALUR KEDELAI Glycine max (L.) Merrill TOLERAN TERHADAP NaCl UNTUK PENANAMAN DI LAHAN SALIN Yuniati, Ratna
Makara Journal of Science Vol. 8, No. 1
Publisher : UI Scholars Hub

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

Abstract

Screening of Soybean Cultivars Glycine max (L.) Merrill under Sodium Chloride Stress Condition. Salinity is one of the most serious and widespread agricultural problems resulting in losses of yield. Generally, as land is more intensively cultivated, the salinity problem becomes more severe. A high concentration of NaCl greatly reduces growth of both the shoot and the root. One strategy available to cope with saline soil is to choose salt-tolerance crops or to select salt-tolerance cultivars within a crop. Experiments were conducted to asses the performance of ten cultivars soybean (Glycine max [L.] Merrill) to salt stress at germination and seedling stages. Salinity treatments were begun by adding 70, 80, 90, and 100 mM NaCl to the basal nutrient solution. According to germination percentage, fresh weight/dry weight ratios, and the percentage of dead apical buds we suggest that Wilis, Malabar and Sindoro were tolerant lines, Genjah Jepang, Lokan, and Tidar were moderate and the sensitive lines were Lumut, Yellow Biloxy, Si Cinang and Sriyono.

Page 55 of 88 | Total Record : 880

 53   54   55   56   57 

Filter by Year

2002 2025


Reset
Filter By Issues
All Issue Vol. 29, No. 3 Vol. 29, No. 2 Vol. 29, No. 1 Vol. 28, No. 4 Vol. 28, No. 3 Vol. 28, No. 2 Vol. 28, No. 1 Vol. 27, No. 4 Vol. 27, No. 3 Vol. 27, No. 2 Vol. 27, No. 1 Vol. 9, No. 1 Vol. 26, No. 4 Vol. 26, No. 3 Vol. 26, No. 2 Vol. 26, No. 1 Vol. 25, No. 4 Vol. 25, No. 3 Vol. 25, No. 2 Vol. 25, No. 1 Vol. 24, No. 4 Vol. 24, No. 3 Vol. 24, No. 2 Vol. 24, No. 1 Vol. 23, No. 4 Vol. 23, No. 3 Vol. 23, No. 2 Vol. 23, No. 1 Vol. 22, No. 4 Vol. 22, No. 3 Vol. 22, No. 2 Vol. 22, No. 1 Vol. 12, No. 1 Vol. 21, No. 4 Vol. 21, No. 3 Vol. 21, No. 2 Vol. 21, No. 1 Vol. 20, No. 4 Vol. 20, No. 3 Vol. 20, No. 2 Vol. 20, No. 1 Vol. 19, No. 4 Vol. 19, No. 3 Vol. 19, No. 2 Vol. 19, No. 1 Vol. 18, No. 4 Vol. 18, No. 3 Vol. 18, No. 2 Vol. 18, No. 1 Vol. 17, No. 3 Vol. 17, No. 2 Vol. 17, No. 1 Vol. 16, No. 3 Vol. 16, No. 2 Vol. 16, No. 1 Vol. 15, No. 2 Vol. 15, No. 1 Vol. 14, No. 2 Vol. 14, No. 1 Vol. 13, No. 2 Vol. 13, No. 1 Vol. 12, No. 2 Vol. 11, No. 2 Vol. 11, No. 1 Vol. 10, No. 2 Vol. 10, No. 1 Vol. 9, No. 2 Vol. 8, No. 3 Vol. 8, No. 2 Vol. 8, No. 1 Vol. 7, No. 3 Vol. 7, No. 2 Vol. 7, No. 1 Vol. 6, No. 3 Vol. 6, No. 2 Vol. 6, No. 1 More Issue