| Penulis | Artikel | Abstrak |
| Tri Meidiansyah | ANALISA PEMANFAATAN STASIUN BUMI BIAK-1 DAN BIAK-2 UNTUK PENERIMAAN DATA CITRA LAPAN TUBSAT | Up to this day there is no video image available for east Indonesia area from Lapan-Tubsat satellite, for there is no ground station to receive payload data in this area. Mean while in Biak island there are two ground stations as a result of cooperation between Indonesia and India that have potency to be used. Both ground stations are working at S-Band frequency, so their specification will match Lapan Tubsat requirement. However, we can only use one of them, so we have to study four aspects that correlate with the compatibility of Lapan Tubsat equipment with S-band ground station. Those four aspects are horizon mask profile of command antenna, downlink budget, compatibility of Lapan Tubsat video receiver with S-band ground station equipment, and compatibility of servo system with Lapan-Tubsat orbit element. Based on the result we can choose which ground station is the better one to be used and how we are going to interface the receiver and orbit element. |
| Fahmi Aldiamar | EVALUASI PETA PERCEPATAN GEMPA SUMATERA (SNI-1726-2002) TERHADAP PETA PERCEPATAN GEMPA MENGGUNAKAN SOFTWARE PSHA | Evaluation on seismic hazard map in Sumatra bedrock was needed because the Indonesian seismic hazard map standard (SNI-1726-2002) was built using the 2D seismic source model and a lot of seismic activity around Sumatera occurred after the SNI-1726-2002 was published. Probabilistic Seismic Hazard (PSHA) software was developed by USGS in 2007 to gain bedrock acceleration value derived from Probabilistic calculation on 3D seismic source using the Next Generation Attenuation (NGA). Therefore this software represented the newest theory to build seismic hazard map and it was used in this research to evaluate and validate the Indonesian standard, particularly Sumatra seismic hazard map. Several phases were done to gain the seismic hazard map, such as collecting and processing earthquake data, calculating seismic risk parameter, acceleration calculation using PSHA software and developing a seismic hazard map using ArcGis Software. Evaluation result indicated that SNI-1726-2002 seismic hazard map in Sumatera bedrock, particularly in region 3,4 and 5 was lower than seismic hazard map developed using PSHA software. The deviation was range between ± 0.05-0.20g. |
| Fitri Nuraeni | ANALISIS ANOMALI SINYAL ULTRA LOW FREQUENCY (ULF) GEOMAGNET SEBELUM TERJADI GEMPA 29 SEPTEMBER 2004 DI BIAK | Ultra Low Frequency (ULF) anomalies on geomagnetic variation data can be caused by external disturbances such as from the sun or space and internal disturbances from the earth. Before the 5.4 Richter Scale earthquake at Biak on September 29, 2004, there are anomalies that might be caused by electromagnetic emission from the earth’s inner layer. These anomalies have been detected on geomagnetic signal in ULF band (10 – 600 sec periods). This paper will discuss the anomaly that was detected before the earthquake, and whether it was a local event within the earth’s inner layer that happened because of the earthquake’s preparation phase or was it actually caused by external disturbances. Data that is being used is the H and Z component of geomagnetic data variation. The Fast Fourier Transform method (FFT method) is being used to process the geomagnetic signal so the data can be filtered by bandpass filter. The Z/H polarization method is being used to analyze the result. Dst and Kp indices are also used to determine whether the anomaly is caused by external or internal disturbances. |
| V. Yulianti Susilo dan Sutari | PEMBUATAN KIT RADIOIMMUNOASSAY (RIA) MIKROALBUMINURIA DENGAN METODE COATED TUBE : PERBANDINGAN TABUNG POLISTIREN “PLAIN” DAN “DASAR BINTANG” | Microalbuminuria is a physiological condition of patient in which albumin is excreted in urine at 20-200 μg/min or 30-300 mg/day. Determination of microalbumin content in the patient urine is very important for early detection of microalbuminuria before nephropathy occurred. Detection of microalbumin in the urine is commonly performed by radioimmunoassay (RIA) technique. Human serum albumin labeled with 125I is commonly used as a tracer and bound and unbound phases in the reaction mixture that can be separated easily and quickly with a coated tube method. Production of RIA kit of microalbuminuria involves preparation of antibody coated into two solid phases of polystyrene tube plain and polystyrene bottom star tube, HSA-125I tracer and standard solution. The polyclonal anti-human serum albumin (anti-HSA) generated in the rabbit with titer 1 : 15000 was obtained after one year then was coated into polystyrene tubes, the tracer HSA-125I was prepared using an iodogen method. Series of HSA standard were made by dilution of HSA with synthetic urine. The yield of HSA- 125I tracer was about 83,94% with radiochemical purity of 92% and specific activity of 3,3576 μCi/μg. The microalbuminuria RIA kit shows good assay performance of 1,05% NSB (Non Spesific Binding) and 78,6% B/T The polystyrene bottom star tube shows more higher B/T of bound and could be maintained within 70 days. |
| Arief Sasongko Adhi | PENINJAUAN METODE PERHITUNGAN AWAL BULAN KAMARIAH KRITERIA MUHAMMADIYAH DENGAN KAJIAN ASTRONOMI | Muhammadiyah has long used a method which is based on the calculation of the conjunction of the Moon and the Sun to determine the beginning of Islamic months. If the conjunction happens before sunset and sunset happens before moonset, then the next day is the beginning of an Islamic month. Such a method often produces dates of the beginning of Islamic months which are earlier than the actual visibility of the lunar crescent. This research was conducted to compare the determination of the beginning of Islamic months produced by different criteria. The criteria compared were Muhammadiyah’s, Lapan’s, SAAO’s, and Odeh’s. Astronomical data needed were obtained from Accurate Times 5.1 software for Cibinong area as the location of reference. Calculations were performed to determine the beginning of Islamic months starting from Sha’ban 1429 until Shawwal 1430. Comparison of the dates produced by the four criteria shows that those calculated by Muhammadiyah’s criterion yielded in five differences out of 15 data points observed. It calls for a review on the criterion. |
| Lidia Kristina Panjaitan | PENELITIAN KEKUATAN STRUKTUR SIRIP ASIMETRI ROKET SPIN TERHADAP PERBEDAAN GEOMETRI | Spin rocket represents one of the rockets that are designed to be able to reach bigger trajectory and accuracy of target. However it was required to be reckoned the influence of unsymmetric fin platform structure, which its most optimal performance by the effect of loading aerodynamic. By examination of structure strength through loading of bending moment with simulation of NXNASTRAN / FEMAP four unsymmetric fin design, so that maximum tension, minimum tension, tension around loading area and influence form fin platform could be obtained. |
| Siti Nurul Aisyiyah Jenie | SYNTHESIS OF PHENOLIC FORMALDEHYDE RESOLE RESIN AS WOOD ADHESIVE USING BIO OIL | Resin jenis resol fenol/formaldehid memiliki aplikasi yang sangat luas dalam bidang teknik kimia, mulai dari insulasi termal hingga sebagai bahan adhesif dalam industri kayu. Resin ini memiliki keunggulan sifat fisis yaitu tingginya ketahanan terhadap kelembapan dan cuaca, yang selanjutnya berguna dalam penggunaan konstruksi luar dan lembap. Sekarang, telah dikembangkan teknologi-teknologi baru untuk memproduksi bahan adhesif kayu dari bio oil. Resole resin dibuat dengan mereaksikan antara fenol dengan formaldehid, di mana 50% dari fenol yang bereaksi disubstitusi oleh fraksi fenol/netral yang diekstraksi dari bio oil. Dalam penelitian ini, lima macam komposisi reaktan digunakan untuk membandingkan kualitas dan sifat fisis masingmasing resin. Setiap resin memperoleh perlakuan yang sama selama sintesis. Hasil dari penelitian ini kurang memuaskan, semua sampel gagal merekatkan kedua permukaan kayu. Akan tetapi, resin yang memiliki kualitas rendah ini dapat diatasi dengan beberapa modifikasi menggunakan bahan aditif. |
| Priyo Wibowo | EFEKTIFITAS PEMASANGAN ABSORBER TERHADAP KALIBRASI MEDAN ELEKTROMAGNET OPEN STRIPLINE | The effectiveness of 4cm x 4cm x 4cm pyramidal absorber lining arrangement on stripline field strength calibration has been studied in the EN 55020 laboratory at Testing Technology Division, P2SMTP-LIPI. The calibration procedure refers to CISPR 20 using Toyo IM5/A software at 84 frequencies from 0.15 - 150 MHz. The number of calibrations is the representation of absorber combination number. This is needed to get the value of RF voltage stripline average deviations depending on absorber number. The result of the data analysis shows that the maximum decreasing of average deviation voltage is 11.186%. However such installation still gives average deviation 0.689dB above deviation limit of ± 2dB. |
| Arbi Dimyati | MODIFIKASI PEMBENTUKAN LAPISAN Zn PADA PERMUKAAN BAJA DUAL FASA DENGAN NITRIDASI RINGAN | In this work an experimental series was performed in order to modify the surface properties and galvanise ability of the dual-phase steel by the nitriding in an ammonia containing atmosphere (bright nitriding) during re-crystallisation annealing. The samples were characterized using various electron microscopy techniques and special preparation methods. The investigations show that during re-crystallization annealing with a relatively short duration because the nitrides formation with a large amount of nitrogen atoms can incorporate into the surface near area of the steel. The steel microstructures and the oxidation behavior of the alloying elements on the steel surface are positively changed. The decreasing of oxidation causes the surface activation that increases the steel/zinc reactions during hot-dipping. The formation of the Fe2Al5 inhibition layer also changes. The best quality of the zinc layer surfaces are achieved on the samples after annealing with ammonia concentration between 0.25 and 1 vol.-%. Therewith a new alternative for controlling the hot-dip galvaniseability of highstrength steels are proposed. |
| Briliant Adhi Prabowo dan Herlan | PERANCANGAN SISTEM KUNCI ELEKTRONIK BERBASIS MIKROKONTROLER AT89C52 | The access security awareness using conventional keys was less practical and much risky of leaving or even loosing the keys. Besides, access can not be locked automatically whenever the authentic user forgets to lock the door. The purposed of this research was to develop the electronic lock system design using personal identification number (PIN). Using PIN as an access key will give an easier method for the authenticated user without decreasing security level, and also it is more practical and easier since the authentic user doesn’t need any key at all. This electronic lock design uses microcontroller AT89C52 for main control of the system which could be implemented on restricted area like laboratories or residences as well. More than 6000 PIN data can be saved in the serial memory 24LC65, and it will be accessed when the user enter the correct PIN. |
| Nono Darsono | EFEKTIVITAS PEMUTUSAN MULTIWALLED CARBON NANOTUBES (MWNT) DENGAN MENGGUNAKAN HIGH ENERGY MILLING DAN CONVENTIONAL BALL MILLING | The cutting efficiency of MWNTs was compared systematically between conventional ball milling and highenergy milling. The efficiency of both processes was evaluated in term of dispersion properties, aggregates size evolution, and degree of crystallinity. Two-hour high-energy milling produced a large portion of MWNTs smaller than 150 nm, while even 120-hour ball milling struggled to achieve smaller than 300 nm. It was revealed by the significantly viscosity value. Since the high-energy milling viscosity was much higher than ball milling, 2-hours high energy milling exhibited lower damage on the MWNTs thread than the 120-hours ball milling according to the Ig/Id ratio and values of raman spectra were 3.63 and 2.81 for high energy milled and ball milled respectively. |
| Tiar Dani | PENGARUH FLARE DAN CORONAL MASS EJECTION (CME) TERHADAP INDEKS Dst GEOMAGNET DAN FoF2 IONOSFER DI ATAS TANJUNGSARI SUMEDANG | This research was conducted to see the effect of solar flare and Coronal Mass Ejection (CME) on geomagnetic and ionosphere above Tanjungsari, Sumedang, West Java. By using Disturbance storm time (Dst) index data for geomagnetic disturbance parameter and critical frequency (fo) of F2 ionosphere layer data for ionosphere disturbance parameter, a graph was plotted between occurrence of flare and CME with Dst index and foF2 from year 2000 to 2003. The result found that flare and CME affect disturbance on geomagnetic caused a geomagnetic storm and disturbance on ionosphere cause an ionosphere storm. Those storms were depended by flare class, CME type, and its position on the sun when they happened. Flare and CME event that happened also required time to reach the Earth. |
| Deswandri | PENGEMBANGAN SIMULATOR UNTUK PENGENDALIAN REAKTOR DAYA TIPE PWR | The load following operation is a mode of operation, where the power level of nuclear power reactor is adjusted based on the load fluctuation at the electric grid. The changes of power level cause unbalance in the reactor. In order to keep the stability of reactor, it needs a specific control method. Three control methods for the PWR type reactors were developed for that purpose. Each method was tested by a numerical simulation, respectively. Since these methods were tested separately, however, it is difficult to compare the performance of all methods directly using the same initial parameters and various standard power patterns. In this work, we developed the simple simulator to simulate the control methods of PWR during the load following operation. By using the standard daily power patterns, it was showed that the simulator could be used well and all results agree with the previous results of the three control methods above. By using the same initial parameters and power pattern, the simulator could directly show the characteristic, superiority and disadvantage of each control method, respectively. |
| Murdahayu Makmur dan Heru Umbara | DETERMINASI CESIUM-137 DARI AIR LAUT MENGGUNAKAN RESIN HEKSASIANOFERAT | Determination of cesium-137 in seawater was done using the hexacyanoferrate resin as ion exchanger from 3 point samplings of surface seawater. The hexacyanoferrate ion exchanger matrix was prepared by performing the reaction of silica gel supported with potassium hexacyanoferrate and copper (II) chloride. In order to test the performance of the ion exchanger, a batch experiment was performed. A known activity of cesium-137 was used to spike seawater then the hexacyanoferrate resin was added. The separated hexacyanoferrate resin was then counted with gamma spectrometer. The cesium-137 concentration used in the work varies between 0.5 Bq–20 Bq while the results of the adsorbing efficiency varies between 58-96%. In time variation between 0.5–20 minutes, the adsorbing efficiency varies between 77–96% with highest efficiency at contact time 60 minutes. The hexacyanoferrate ion exchange columns were used to process the Jepara’s seawater. The calculated cesium-137 activities were 1.37 Bq/m3–2.76 Bq/m3 |
| Epung Saepul Bahrum | PERHITUNGAN TEMPERATUR KELUARAN DAN MASUKAN PENDINGIN PRIMER DAN SEKUNDER PB-BI DI INTERMEDIATE HEAT EXCHANGER | Analyze of intermediate heat exchanger in Pb-Bi cooled nuclear reactor for hydrogen production design have been done. Based on one dimensional convective and conduction heat transfer model, temperature distribution of primary and secondary Pb-Bi at IHX have been modeled. Heat transfer coefficients of primary and secondary Pb-Bi coolant are calculated by sub channel analysis method. Primary and secondary Pb-Bi coolant temperature distribution obtained by solving numerically first orders differential equation using Runge-Kutta- Gill method. Incase primary coolant flow rate 7000 kg/s and IHX inlet temperature 5520C, outlet temperature and flow rate of Pb-Bi secondary coolant are 5420C and 2700 kg/s. The temperature secondary coolant 5420C corresponds to chemical reaction temperature of steam membrane reforming. |
| Christina Ani Setyaningsih | STUDI PALINOLOGI FORMASI MENTAWIR, SUB CEKUNGAN KUTAI BAWAH, KALIMANTAN TIMUR | Palynological study of the Mentawir Formation, Lower Kutai Basin, East Kalimantan has been conducted on the 27 selected cutting samples of the ’X’ Well in the depth of interval 100’-4.140’ which is situated in ’DNA’ Field. The purpose of this study is to determine the age and depositional environment and biostratigraphic sequence of the sediment. The age of the sediment is primarily marked by the last appearance of Florschuetzia trilobata at 850’, range from Middle Miocene to Late Miocene. The Middle Miocene age occupies sediments from interval 850’-4.140’, whilst the Late Miocene age covers sediments from interval 100’-850’. Delta environment of the interval samples were deposited in lower delta plain (distal) to the delta front (distal). Based on the changes on the amount of the taxa group in the mangrove and freshwater ecology as well as the changes in the sedimentation, thus the biostratigraphic sequence of the 2 X2 Well with depth of interval 100’- 4.140’ in 2 DNA2 field lies in the Transgressive System Tract to the Highstand System Tract |
| Muhammad Rusli | ANALISIS KEHANDALAN STRUKTUR BANGUNAN WISMA ATLIT RAGUNAN PASCA KEBAKARAN | The data acquisition of the post-fire construction is done by visual observation, dimension measurement, concrete field testing and also laboratory testing. Visual observation above the third floor which is directly on fire, indicate serious damages with the result that all of the building component above the third floor must be replaced by a new construction. The testing of building material shows that the grade of concrete component which is directly fired has fc’=6.8 MPa, while the non-fired component has fc’=15.2 MPa. The structural analysis shows that most of the building components at the first and the second floor are able to be functioned with a little repair of longitudinal balk at their support section to increase bending capacities. |
| Wening Lestari dan A Mutalib | PEMODELAN SENYAWA PHALERIN BERTANDA 125I UNTUK UJI ANTIRADANG | A model of 125I-phalerin was designed in this research. The work was started by designing phalerin based on available data and followed by minimizing energy at bond angles, i.e C4-C5-C7-C8 (φ 1) , C5-C7-C8-C9 (2),C3-O14-C15-C20 (3) and C4-C3-O14-C15 (4).This work was then continued with designing of 125I-phalerin. Both models were put in overlaid position, then they were characterized. Result showed that phalerin model has characteristic of bond angle with 1, 2, 3, 4= 400, 400 , 3200 , 2800 respectively. Energy of phalerin model was 18,7625 kkal/mol. 125I-phalern has similarity conformation with phalerin and the RMS for bond length, bond angle 0.0091 ú and 0.50390 respectively. |
| Isti Daruwati, Misyetti, dan Maula Eka Sriyani | KARAKTERISASI FISIKOKIMIA CTMP BERTANDA TEKNESIUM- 99m SEBAGAI RADIOFARMAKA PENYIDIK KANKER TULANG | Radiopharmaceutical for bone cancer seeking was developed in variable phosphonate compound labeled with technetium-99m, formally pyrophosphate and diphosphonate compound. Either pyrophosphate or diphosphonate still unsatisfied to use as radiopharmaceuticals for bone seeking agent because the high accumulation in lever, muscle and blood. CTMP have higher affinity than others. The Physicochemical characterization of 99mTc-CTMP has been conducted. The characteristic of labeled compound have to fulfill the criteria as the good radiopharmaceutical. The characteristic such as radiochemical purity, electric charge, lipophilicity, plasma protein binding, and hydroxy apatite binding. The results showed that the radiochemical purity greater than 95% (96,83 % ± 1,35), have a negative electric charge, lipophilicity -2,61, plasma protein binding 31,90 % ± 3,3, hydroxyl apatite binding 76,6% at 3 hours. The value of hidroxy apatite binding was high, it showed CTMP have indicated a great potential as radiopharmaceutical for bone cancer seeking |
| Latifa Hanum Lalasari dan Enjarlis | PENGOLAHAN LINDI TPA DENGAN METODE KOAGULASI DAN OZONASI | Landfilling of municipal waste is a major problem of the waste management system in Indonesia. The generated leachate must be appropriately treated before being discharged into the environment because it was toxic. The aim of this research was to compare the coagulation, ozonation, coagulation-ozonation, and ozonationcoagulation processes of landfill leachate at TPA Bantar Gebang Bekasi, to classify the result of landfill leachate treatment, and to provide an efficient method for the treatment of leachates, in order to reduce pollutants’ content to concentration values lower than the corresponding limits. The variables selected in this research were types of coagulant, dosage of coagulant, and time duration of ozonation process. Parameters selected in this research were colour, taste, pH, Chemical Oxygen Demand ( COD), Total of Suspended Solid ( TSS), Chloride ion ( Cl-) and ammonia ion( NH4+). The result of research have shown that the best optimum method of landfill leachate treatment was coagulation-ozonation combination process using FeCl3 0.25% as a coagulant and a ozonator (0.25 g O3//h) for 75 minutes at pH of 9. The process succeed to degrade the value of COD, Cl, NH4 + were about 90,91%, 13,45% , 6,68%, respectively and category of B grade for treated leachate. |
| Chandra Risdian, Tjandrawati, Muhamad Hanafi, Yulia Anita, dan AMJ Putra | POTENSI PENGINDUKSI APOPTOSIS SENYAWA NIKOTINIL DIBUTIL GLUTAMAT ESTER TERHADAP SEL KANKER T47D | Nicotinil Dibuthyl Glutamate Ester (NDBGE) is a synthetic compound that is an analog of antibiotic UK- 3A from mycelium of Streptomyces sp.517-02. This compound was estimated to have anticancer activity similar to UK-3A. The aim of this research was to know the NDBGE’s apoptotic inducing potency to human breast cancer T47D in vitro. DMEM + 1% PS + 10% FBS was added to human breast cancer T47D cells until cell concentration reached 1-5x105cells/ml. NDBGE then was diluted by DMSO until 100ppm concentration. Propidium iodide with 50μg/ml concentration was added to the T47D cells. The analysis was conducted by flow cytometry method. The result was that the apoptosis percentage of the cells was 12,35%. |
| Vincentia Esti Windiastri dan Endang Semiarti | TRANSFORMASI GEN ARABIDOPSIS ASYMETRIC LEAVES2 (AS2) PADA ANGGREK PHALAENOPSIS AMABILIS (L.) Blume DENGAN MEDIATOR AGROBAKTERIUM TUMEFACIENS | The Asymmetric leaves2 (AS2) gene is an important gene of a model plant, Arabidopsis thaliana, that involved in leaf development. To understand the molecular mechanism of leaf development in orchid, we transformed the AS2 gene into the Phalaenopsis amabilis orchid protocorms (developing orchid embryos). Agrobacterium tumefaciens LBA4404 that contained T-DNA with 35S::AS2 construct and pGreen vector were used for transformation. The-21-day-old protocorms that co-cultivated with Agrobacterium culture containing pG35S::AS2/LBA 4404 and pG35S/LBA4404 were maintained on 100 mg/l kanamycin containing medium. The growing plants were selected as candidate of transformants. The putative transformants were analysed by PCR with a pair of AS2 gene specific primers (ORF15 F2 and ORF15 R2), that amplifying 600 bp fragment of AS2 gene. The result showed that 79 plants out of 7966 protocorms transformant p35S::AS2 and 64 plants out of 4622 protocorms transformant pG35S were kanamycin resistants, the efficiency of transformations were 0.99% and 1.38%, respectively. Phenotype characterization of the transformation showed that they produced various abnormal leaves shapes: oval (34.18%), wildtype-like (30.38%), rectangular (26.58%), lobed (3.80%), fused (2.53%) and trumpet (2.53%). These data indicate that abnormal shape of leaves might be due to the expressions of AS2 transgene in P. amabilis. |
Penulis : Tri Meidiansyah, Fahmi Aldiamar, Fitri Nuraeni, V.Yulianti Susilo, Sutari, Arief Sasongko Adhi, Lidia Kristina Panjaitan, Siti Nurul Aisyiyah Jenie, Priyo Wibowo, Arbi Dimyati, Briliant Adhi Prabowo , Herlan, Nono Darsono,
Tiar Dani, Deswandri, Murdahayu Makmur, Heru Umbara,
Epung Saepul Bahrum, Christina Ani Setyaningsih, Muhammad Rusli, Wening Lestari, A.Mutalib, Isti Daruwati, Misyetti, Maula Eka Sriyani, Latifa Hanum Lalasari, Enjarlis, Chandra Risdian, Tjandrawati, Muhamad Hanafi, Yulia Anita, AMJ Putra, Vincentia Esti Windiastri, Endang Semiarti
Dewan redaksi : Rochadi Abdulhadi, M Bashori Imron, Iroh Siti Zahroh, Elizabeth A Widjaja, Masno Ginting, Rusdi Muchtar, Gono Semiadi, Dwi Purwoko, Tarzan Sembiring, Soebandriyo, Wahjoe Suprihantoro, M Ahkam Subroto, Tri Muji Ermayanti, Pardamean Sebayang, Endang Tri Margawati, Aswatini, Sarwintyas Prahastuti, Dodi Rosadi, Siti Kania Kushadiani, Nanik Supriyanti, J Mulawardana
ISSN : 1411-7932
Tahun Penerbitan : 2011
Penerbit : LIPI PRESS
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