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
 74   75   76   77   78 
TINGKAT PENCEMARAN LOGAM BERAT DALAM AIR LAUT DAN SEDIMEN DI PERAIRAN PULAU MUNA, KABAENA, DAN BUTON SULAWESI TENGGARA Ahmad, Fasmi
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

The Degree of Heavy Metals Pollution in Seawater and Sediment in the Waters of Muna, Kabaena and Buton Island, Norteast of Sulawesi. Muna, Kabaena, and Buton are islands found in Northeast of Sulawesi. One of them, namely Kabaena Island is island which has high Nickel content. Some of mining industries has explored the Nickel content in this area. Tailing come from mining thrown to the sea, will increase the heavy metals content in seawater and sediment in the waters of that third island, remembering the position of that third island not so far. In order to marine pollution monitoring by heavy metals, Research Center for Oceanography has done some marine research in the waters of that third island in April 2006. The aim of this research is to know the impact of Nickel mining activities to heavy metals content in seawater and sediment in that third waters. Heavy metals monitored is Pb, Cd, Cu, Zn, and Ni. The results showed that the content of heavy metals Pb, Cd, Cu, Zn, and Ni in sea water still in line with the threshold value according to Kep MNLH No. 51, 2004 for sea biotas. The same condition also found in sediment, where the content of Pb, Cd, Cu, Zn, and Ni is low relative, and still in line with heavy metals content found in normal seawater.
OPTIMASI BIODEGRADABILITAS DAN UJI TOKSISITAS HASIL DEGRADASI SURFAKTAN LINEAR ALKILBENZENA SULFONAT (LAS) SEBAGAI BAHAN DETERJEN PEMBERSIH Budiawan, Budiawan; Fatisa, Yuni; Khairani, Neera
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

Optimization of Biodegradability and Toxicity Testing of Degradation Product from Linear Alkyl Benzene Sulfonate (LAS) Surfactant as Cleaning Detergent Agent. Linear Alkyl Benzene Sulfonate (LAS) is a surfactant used in laundry detergent as cleaning agent and toxic to aquatic organisms. Results shows, with the LAS concentration used (20 ppm) in medium, adaptation time and Acinetobacter sp. growth has shown better biodegradation ability than three other bacteria used Pseudomonas putida, Pseudomonas fluorescence, Bacillaria spp. Thus, Acinetobacter sp is used further for biodegradation process of LAS. Based on its biodegradation half-life using Acinetobacter sp, and with mixed culture (± 52.32% and ± 46.82% respectively) could be achieved in 4 (four) days, LAS could be categorized as a biodegradable compound. The toxicity assay is based on tetrazolium dye reduction with Rhizobium meliloti as indicator organism. LAS is more toxic than its intermediate product from biodegradation, with IC50 = 34.35 ppm, and the intermediate product, Ac and Cm, has IC50 = 446.19 ppm and 111.28 ppm respectively. Identification of intermediate products using IR and LC-MS analysis shows that the degradation product contains chemicals compounds with functional group as follows: benzene, benzoic acid, hydroxyl, and aliphatic carbons with large molecule weight. Until its half-time degradation time, LAS biodegradation process only occurs at the aliphatic carbon chain, and have not yet reached the stage of aromatic ring opening.
APPLICATION OF HYDROXYAPATITE IN PROTEIN PURIFICATION Yusuf, Permai Sari Molyana; Dahlan, Kiagus; Witarto, Arief Budi
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

The precursors, Na2HPO4.2H2O and CaCl2.2H2O are used for synthesizing pure hydroxyapatite which less of carbonate content. The high temperature of sintering, about 700o C of temperature, is treated to minimize the carbonate group on hydroxyapatite surface. Carbonate content of hydroxyapatite which is sintered in 700o C is less than 110o C. It indicates an increasing temperature of sintering will increase crystallinity and decrease carbonate content of hydroxapatite. This method gave better way to resulting hydroxyapatite crystal. The patterns of band of SDS PAGE in resulting of Protein Purification by DEAE matrix is also appear in using hydroxyapatite matrix. The other band also appear in purification by hydroxyapatite matrix, it showed that hydroxyapatite not only has DEAE matrix characteristic as anion exchange but also has kation exchange characteristic. These patterns proof that hydroxyapatite could be used in protein purification as matrix as cation an anion exchange. Additionally, apatite matrix is abiding and can be used repeatedly more than one hundred times without contamination.
TEKS PADA BATU NISAN BARON VAN IMHOFF DILIHAT MELALUI ANALISIS SEMIOSIS MODEL PEIRCE DAN DANESI-PERRON Suratminto, Lilie
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

Entering the Puppet Museum in Jakarta we come across with beautiful tombstones of the period of The Dutch –East Indian Company or the VOC (Verenigde Oost Indische Compagnie). The tombstones are clinking on the left wall inside the building. Compare with the others, the tombstone of Gustaaff Willem Baron van Imhoff is very unique because it has a different style of its heraldry. This paper revealed the historical background of Van Imhoff who had played an important role in the Indonesian’s colonial history in the middle of the eighteen century. The micro and the macro analyses of the data of the tombstone show that the verbal and the non-verbal data support the historical data. The result of this analysis enriches the knowledge of the cultural heritages from the colonial period of our country
KESETIMBANGAN AIR SUB DAS KARANGMUMUS DI KOTA SAMARINDA Ismail, Ismail
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

Water Balance Analysis at Karangmumus River Basin Area (RBA) Samarinda City. Karangmumus RBA to getting degradation pressure being concrete drying and flooding so much to frighten. Climate data from BMG Temindung and SPAS Lempake has to water balance analysis based on Hewlett and Nutter methode. This region have the Area Class III (1500–2000 mm/year). With the bimodel or double wave rainfall models with C patern. The hight rainfall depth periode at December and April, therefore the low rainfall depth at September and November. Have level Q = ± 9.9%, or rainfall tipe A (very wet area with tropical wet vegetation) and E1 agroclimte zone. Water balance monthly indicated that this area have to water surplus 8 month, i.e. January (27.0 mm), February (57.3 mm), March (119.7 mm), April (72.8 mm), May (48.4 mm), Juni (19.6 mm), November (58.7 mm) and December (75.3 mm), or total amounts water surplus 478.8 mm/year. The water deficits at Juni (0.4 mm), July (0.3 mm), Augus (3.9 mm), September (13.6 mm) and October (26.7 mm) or total amount water deficits (44.5 mm/year).
KARAKTERISTIK DAN VARIABILITAS BULANAN ANGIN PERMUKAAN DI PERAIRAN SAMUDERA HINDIA Martono, Martono
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

Monthly Characteristic and Variability of Surface Wind Over the Indian Ocean. This research was conducted to understand monthly characteristic and variability of surface wind circulation over the Indian Ocean. The method used in this research was descriptive analysis. The data used was the monthly direction and velocity of surface wind obtained from the National Oceanic and Atmospheric Administration. The result showed that the monthly variability of surface wind circulation over the Indian Ocean is influenced by movement of the sun. The change in the variability of surface wind circulation was more in the northern hemisphere, but vice versa surface wind circulation in the southern hemisphere was constant during the year. Generally, velocity of surface wind circulation was the greatest occurred in July and was the weakness occurred in April.
KARAKTERISTIK GELOMBANG DAN ARUS DI ERETAN, INDRAMAYU Hadikusumah, Hadikusumah
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

The Wave and Current Characteristic at Eretan, Indramayu. Erosion process occurs in many places, but each of these processes have their respective characteristics. The purpose of research for understanding the dynamics of the process that caused the coastline of the interaction between air, sea and land. Research has been conducted in Eretan, Indramayu in 2006. The results show the average wave height (H1/3) in February obtained higher (60.4 cm) compared with August (23.6 cm) and in May obtained a much lower (5.7 cm). Current velocity in February and in August obtained dominant raised due to by field of wave and the influence of tidal currents do not exist. Instead current velocity obtained in May was raised by the dominant tidal currents and very small currents generated by the wave field. The influence of the wave field to the velocity and direction of flow will distribute sediment transport in the area of wave breack (breack water) to the coastline. Characteristic wave has a period of 3, 5, and 7 second is the trigger shoreline retreat 1.5 m/year.
VARIABILITY OF SATELLITE-OBSERVED SEA SURFACE HEIGHT IN THE TROPICAL INDIAN OCEAN: COMPARISON OF EOF AND SOM ANALYSIS Iskandar, Iskhaq
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

Weekly sea surface height (SSH) in the tropical Indian Ocean (20°S - 20°N) was analyzed for the period of January 1993 – December 2007 using an empirical orthogonal function (EOF) and a self-organizing maps (SOM) analysis. The EOF analysis identifies four patterns and three of them are contained in the SOM patterns. The SOM, on the other hand, characterizes the sea level variability, which shows twenty-five patterns. The patterns with low (high) sea surface height anomaly (SSHA) in the southern (northern) hemisphere associated with the monsoonal winds dominate the variation in both two methods. The SOM is also able to separate typical patterns associated with the ENSO and or the Indian Ocean Dipole (IOD) events. Low SSHA occupied the western half of the basin while high SSHA loaded in the eastern basin when the La Niña event is taking place. The El Niño event is characterized by low SSHA in the northern hemisphere, along the equator and along the eastern boundary, while high SSHA in the southwestern part of the basin. The IOD event shows a dipole like pattern with low SSHA in the east and high SSHA in the west. When the IOD co-occurred with El Niño, a distinct dipole pattern is clearly observed.
DETEKSI PEMALSUAN CITRA BERBASIS DEKOMPOSISI NILAI SINGULIR Liliana, Dewi Yanti; Basaruddin, T.
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

Image Fakery Detection Based on Singular Value Decomposition. The growing of image processing technology nowadays make it easier for user to modify and fake the images. Image fakery is a process to manipulate part or whole areas of image either in it content or context with the help of digital image processing techniques. Image fakery is barely unrecognizable because the fake image is looking so natural. Yet by using the numerical computation technique it is able to detect the evidence of fake image. This research is successfully applied the singular value decomposition method to detect image fakery. The image preprocessing algorithm prior to the detection process yields two vectors orthogonal to the singular value vector which are important to detect fake image. The result of experiment to images in several conditions successfully detects the fake images with threshold value 0.2. Singular value decomposition-based detection of image fakery can be used to investigate fake image modified from original image accurately.
EKSPRESI RELATIF mRNA HIF-1α PADA JANTUNG, OTAK DAN DARAH TIKUS SELAMA INDUKSI HIPOKSIA SISTEMIK Wanandi, Septelia Inawati; Dewi, Syarifah; Paramita, Reni
Makara Journal of Science Vol. 13, No. 2
Publisher : UI Scholars Hub

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

Abstract

Relative Expression of HIF-1α mRNA in Rat Heart, Brain and Blood During Induced Systemic Hypoxia. Hypoxia is a pathological condition in which the body as a whole or region of the body (tissue or cell) deprived of adequate oxygen supply. The transcriptional regulator hypoxia inducible factor-1 (HIF-1) is an essential mediator of O2 homeostasis. Unlike the β sub unit (HIF-1β), the activity of HIF-1α is controlled in an oxygen-dependent manner. It has been reported that the stability and expression of HIF-1α during hypoxia is remarkably higher than those under normoxic conditions.The aim of this study was to analyze the adaptive tissue responses during induced systemic hypoxia by comparation of relative expression of mRNA HIF-1α in rat heart, brain and blood. Twenty-five male Sprague Dawley rats were subjected to systemic hypoxia by placing them in the hypoxic chamber supplied by 8-10% of O2 for 0, 1, 7, 14 and 21 days, respectively. The relative expression level of HIF-1α mRNA in brain, heart and leucocyte cells were analyzed using quantitative RT-PCR assay (Real Time PCR) based on Pfaff’s formula. This study demonstrates that the increased of relative expression of HIF-1α mRNA during induced systemic hypoxia reached its maximum level at day 7 (in heart) or at day 14 (in brain), whereas in leucocyte cells the stimulation of HIF-1α expression was intensively maintained up to 21 days although the expression has reached the remarkably high level. We could conclude that HIF-1α as an oxygen sensing during systemic hypoxia has different capacity and sensitivity in brain, heart and blood tissues, due to the importance of oxygen homeostasis in each tissue

Page 76 of 88 | Total Record : 880

 74   75   76   77   78 

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