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Jurnal Sains Materi Indonesia
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Jurnal Sains Materi Indonesia (Indonesian Journal of Materials Science), diterbitkan oleh Pusat Teknologi Bahan Industri Nuklir - BATAN. Terbit pertama kali: Oktober 1999, frekuensi terbit: empat bulanan.
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Articles 865 Documents
SINTESIS NANO ZEOLIT ALAM MENGGUNAKAN METODE BALL MILLING Makmur Sirait; Nurdin Bukit; Usler Simarmata
Jurnal Sains Materi Indonesia Vol 16, No 1: OKTOBER 2014
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (695.899 KB) | DOI: 10.17146/jsmi.2014.16.1.4326

Abstract

SINTESIS NANO ZEOLIT ALAM MENGGUNAKAN METODE BALL MILLING. Telah disintesis nanozeolit alam Pahae dengan metode ball milling. Penelitian ini dilakukan untuk meningkatkan nilai jual sumber daya alam Sumatera Utara khususnya zeolit. Zeolit digerus sampai halus, lalu diayak dengan ukuran 200 mesh. Zeolit kemudian diaktivasi secara kimia dengan menggunakan HCl untuk membersihkan zeolit dari pengotor, dan secara fisis dengan kalsinasi pada suhu 600 oCselama 2 jam untuk mengurangi kadar air. Selanjutnya, serbuk zeolit yang sudah diaktivasi tersebut dimasukkan ke dalamball miling dan diaduk selama 10 jam untuk mendapatkan serbuk nanozeolit. Hasil X-Ray Diffraction (XRD) menunjukkan dua fasa dominan yaitu calsium aluminium silicate hydrate (CaAl2Si10O24.7 H2O) dan aluminium oxide (Al2O3). Dengan persamaan Scherer diperoleh ukuran kristal rata-rata zeolit adalah 74 nm. Hasil X-Ray Fluorescence (XRF)menunjukkan kandungan zeolit alam Pahae terdiri dari senyawa Na2O (1,03%), MgO (0,82%), Al2O3 (17,29%), SiO2 (71,06), K2O (4,63%), CaO (1,92%), TiO2 (0,51%) dan Fe2O3 (2,75%).
PREDICTION OF MOULD FILM THICKNESS IN THE BISMUTH BASED ALLOY CONTINUOUS CASTING PROCESS. Continuous casting is an important manufacturing process for producing ingots, slabs and flat products. The lubricant known as the mould flux in the meniscus region of continuous casting process flows through the space between the solidified shell and water cooled mould wall under the influence of the mould oscillation, gravity and the casting speed. The lubrication process in continuous casting upper mould Barman Tambunan
Jurnal Sains Materi Indonesia EDISI KHUSUS: OKTOBER 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (352.952 KB) | DOI: 10.17146/jusami.2006.0.0.4939

Abstract

PREDICTION OF MOULD FILM THICKNESS IN THE BISMUTH BASED ALLOY CONTINUOUS CASTING PROCESS. Continuous casting is an important manufacturing process for producing ingots, slabs and flat products. The lubricant known as the mould flux in the meniscus region of continuous casting process flows through the space between the solidified shell and water cooled mould wall under the influence of the mould oscillation, gravity and the casting speed. The lubrication process in continuous casting upper mould region is characterized as the hydrodynamic lubrication phenomena. The film thickness at this working region zone is considered to be important and it may determine the quality of the surface of the billet/slab during continuous casting. Maintaining an optimal film thickness is very important to prevent the metal-to-metal contact between the surface of the strand and the mould wall. In this work, the changes in diameter of the cast bismuth based alloy billet were monitored during continuous casting in order to estimate the film thickness of the lubricant inside the mould. The result denotes that the thermal induced viscosity play an important role in the film thickness formation of a continuous casting process.
PROSES FINISHING KAIN PAYUNG NYLON 66 MEMPERGUNAKAN RESIN FLUOROKARBON (WATER REPELLENT AGENT) DAN ESTER ASAM POLIAKRILAT (COATING AGENT) Kuntari Kuntari; Gde P. Astawa
Jurnal Sains Materi Indonesia Vol 9, No 2: FEBRUARI 2008
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (162.509 KB) | DOI: 10.17146/jsmi.2008.9.2.4800

Abstract

PROSES FINISHING KAIN PAYUNG NYLON 66 MEMPERGUNAKAN RESIN FLUOROKARBON (WATER REPELLENT AGENT) DAN ESTER ASAM POLIAKRILAT (COATING AGENT). Untuk mendapatkan kualitas kain payung terbaik dan memenuhi syarat daya tolak air sesuai SNI 08-1517-89 dan American standard No L 22.30.13-1960, telah dilakukan percobaan proses finishing water repellent dengan variasi konsentrasi fluorokarbon 20 g/L hingga 35 g/L interval 5 g/L dan suhu curing (pemanas awetan) 150 oC hingga 210 oC interval 15 oC. Proses coating dilakukan dengan zat coating ester asam poliakrilat dengan metoda pencapan blok mempergunakan kasa pencapan, kemudian pengeringan pendahuluan pada suhu 100 oC selama 1 menit, dilanjutkan dengan pemanas awetan pada suhu 160 oC selama 1 menit. Percobaan dilakukan mempergunakan dua metode yaitu metode pertama kain diproses coating terlebih dahulu, kemudian diproses finishing water repellent dan metode kedua kain diproses finishing water repellent terlebih dahulu, setelah itu diproses coating. Pengujian dilakukan terhadap: daya tolak air, uji siram, uji tekanan hidrostatik, tahan hujan Bundesmann, sudut kembali dari lipatan, kekuatan tarik kain, kekakuan kain dan uji kenampakan kain setelah pencucian berulang. Dari hasil pengujian ternyata bahwa peningkatan konsentrasi resin fluorokarbon dan suhu curing menaikkan kekakuan kain, sudut kembali dari lipatan dan tahan hujan Bundesmann, tetapi menurunkan kekuatan tarik, serta tidak berpengaruh terhadap daya tahan air uji siram dan uji tekanan hidrostatik. Kondisi terbaik proses finishing water repellent diperoleh pada konsentrasi fluorokarbon 25 g/L dan suhu curing 165 oC. Dari kedua metode tersebut ternyata memenuhi standar dan hasil tolak air percobaan metode pertama lebih baik dari pada metode kedua.
SYNTHESISAND CHARACTERIZATION OFNATURALRUBBER-SILICACOMPOSITE Indra Gunawan; Hildayati Hildayati; Sudirman Sudirman; Emil Budianto
Jurnal Sains Materi Indonesia Vol 12, No 2: FEBRUARI 2011
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1569.819 KB) | DOI: 10.17146/jsmi.2011.12.2.4591

Abstract

SYNTHESISAND CHARACTERIZATION OFNATURALRUBBER-SILICACOMPOSITE. The composite of natural rubber-silica have been developed with a combination of silica (SiO2)particles in irradiated natural rubber. This research was conducted with the aim to composite material with irradiated natural rubber as the matrix and silica particles as filler and to study the distribution of silica in the matrix as well as mechanical and physical properties. The results showed that the SiO2 particles homogenously distributed across the surface of natural rubber matrix as the cluster. The particles are arranged as a cluster by using 3-aminopropyltriethoxysilane (APTES) as a coupling agent. Tensile strength, tensile modulus and elongation at break of composite materials have increased as the addition of SiO2 on the composition of 9 to 12 percent weight in natural rubber. Additions of SiO2 composition in the matrix will also increase the hardness of the composite. Structural analysis were performed using FT-IR and SEM. Composite of natural rubber-SiO2 have a great potential to be applied as a natural rubber base materials mainly as protective products with higher performance.
SYNTHESIS AND CHARACTERIZATION OF GRAPHITE NANOSTRUCTURE THIN FILM WITH SPUTTERING TECHNIQUE Yunasfi Yunasfi; Salim Mustofa; Deswita Deswita
Jurnal Sains Materi Indonesia VOL 13, NO 1: OKTOBER 2011
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (287.158 KB) | DOI: 10.17146/jusami.2011.13.1.5401

Abstract

SYNTHESIS AND CHARACTERIZATION OF GRAPHITE NANOSTRUCTURE THIN FILM WITH SPUTTERING TECHNIQUE. Synthesis and characterization of graphite nanostructure thin film using the DC-sputtering technique has been carried out. Nanostructured graphite for target of deposition using DC-Sputtering technique has been prepared by milling technique using High Energy Milling (HEM) with the variation of milling time between 50 hours until 100 hours. First, the graphite target was prepared by doing a compaction using press machine to the nanostructured graphite powder got from milling process. Secondly, a thin filmof graphite was fabricated using DC-Sputtering technique. The phase identification of nanostructured graphite thin filmwere carried out using X-Ray Diffraction (XRD), and the surface and cross section morphology of thin filmwere observed using Scanning Electron Microscopy (SEM). XRD identification shows the presence of peaks of Si(100) and C(002) in all conditions of preparing powder using for target, but a shift of the angel‘s peak to the left and the decreasing of peak intensity were found. While the observation using SEM to surface morphology of thin film shows that the form of thin films are mostly homogeneous, smooth and flat at the milling time of 50-75 hours. From the SEM photograph of cross section, it is shown that there is a tendency of the more commonly found particles of droplets on the surface of thin film with the increasing of milling process against the carbon powder as a constituent of pellets for the DC-Sputtering targets, especially in the case of C/Si thin filmfabricated using target prepared by milling for 100 hours, the morphology of surface was worst.
ANALISIS SIFAT MEKANIK DAN MAGNETIK MAGNET KOMPOSIT BERBASIS HEKSAFERIT SrFe12O19 DENGAN MATRIKS POLIPROPILENA DAN POLIETILENA. Sudirman Sudirman; Ridwan Ridwan; Mujamilah Mujamilah; Hany Julaiha; Ela Hayati
Jurnal Sains Materi Indonesia Vol 3, No 2: FEBRUARI 2002
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jusami.2002.3.2.5143

Abstract

ANALISIS SIFAT MEKANIK DAN MAGNETIK MAGNET KOMPOSIT BERBASIS HEKSAFERIT SrFe12O19 DENGAN MATRIKS POLIPROPILENA DAN POLIETILENA. Bahan magnet konvensional terbuat seluruhnya dari bahan logam melalui proses casting dan sintering sehingga terdapat kekurangan seperti berat, rapuh dan harganya cukup mahal. Magnet komposit merupakan gabungan antara serbuk magnet heksaferit dan bahan pengikat bukan magnetik seperti polimer. Oleh sebab itu sekarang ini dikembangkan magnet komposit, mengingat akan diperoleh bahan magnet yang ringan, elastis dan murah. Pada penelitian ini, digunakan binder berupa polimer yaitu polipropilena melt flow 2 (PP MF2) dan 10 (PP MFlO) serta polietilena jenis LDPE. Pembuatan magnet komposit dilakukan dengan metoda blending yaitu mencampurkan polimer (LDPE, PP MF2 dan PP MF10)dengan variasi fraksi volume serbuk heksaferit SrM (SrFe12O19) sebesar 29, 33, 38, 41, 50 dan 60% v/v ke dalam labo plastomill pada suhu 130 °C untuk LDPE dan 180 °C untuk PP MF2 dan PP MF10. Hasil yang diperoleh berupa bahan magnet komposit dibuat dalam bentuk lembaran dan dikarakterisasi sifat mekanik (kekuatan tarik, perpanjangan putus dan kekuatan luluh) dan sifat magnetnya. Hasil yang diperoleh menunjukkan bahwa ketiga jenis polimer PP MF2, PP MF10 dan LDPE dapat berfungsi sebagai binder didalam pembuatan magnet komposit, tetapi hanya polimer jenis PP MF2 yang dapat berfungsi sebagai binder untuk komposisi 60% fraksi volume (%v/v). Dari sifat mekanik magnet komposit dengan matriks polimer yang berbeda hanya kekuatan tarik yang diperoleh, sedangkan kekuatan luluh dan perpanjangan putus tidak diperoleh. Sedangkan kekuatan tarik magnet komposit berbasis SrM untuk matriks polimer PP MF10 paling tinggi dicapai pada komposisi 33% volume serbuk sebesar 205,8 Kg/cm2. Untuk LDPE diperoleh tegangan tarik maksimum sebesar 99,2 Kg/cm2 pada komposisi 50% fraksi volume, sedangkan pada polimer PP MF2 diperoleh tegangan tarik sebesar 220,5 Kg/cm2 untuk komposisi 50% fraksi volume. Sifat magnetik untuk ketiga jenis komposit ini mempunyai harga yang hampir sama dengan nilai produk energi terendah pada komposisi 29% fraksi volume SrM adalah 0,07 MGOe dan tertinggi pada komposisi 60% fraksi volume SrM adalah 0,276 MGOe.
SIFAT FISIS FILM TIPIS TiO2-Co YANG DITUMBUHKAN DENGAN TEKNIK MOCVD Horasdia Saragih; Ridwan Ridwan; Mujamilah Mujamilah; Pepen Arifin; Mohamad Barmawi
Jurnal Sains Materi Indonesia Vol 7, No 2: FEBRUARI 2006
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (415.569 KB) | DOI: 10.17146/jsmi.2006.7.2.5002

Abstract

SIFAT FISIS FILM TIPIS TiO2-Co YANG DITUMBUHKAN DENGAN TEKNIK MOCVD. Film tipis TiO2-Co telah berhasil ditumbuhkan dengan teknik MOCVD dengan menggunakan prekursor titanium (IV) isopropoxide [Ti(OCH(CH3)2)4] 99,99%dan serbuk tris (2,2,6,6-tetramethyl-3, 5-heptanedionato) cobalt (III) [Co(TMHD)3] 99%. Parameter penumbuhan, seperti: suhu bubbler Ti(OCH(CH3)2)4 50oC, suhu substrat 450oC, tekanan bubbler Ti(OCH(CH3)2)4 260 Torr, laju aliran gas argon ke bubbler Ti(OCH(CH3)2)4 100 sccm, laju aliran gas O2 60 sccm dan tekanan total penumbuhan 2 Torr, ditemukan menjadi parameter penumbuhan yang paling optimal. Struktur kristal film sangat dipengaruhi oleh kehadiran dan konsentrasi atom Co. Ukuran butiran dan kekasaran permukaan film bertambah dengan bertambahnya kandungan Co. Kemampuan larut (solubility) atom Co ke dalam matrik kisi TiO2 teramati mulai bersaturasi pada kandungan Co sekitar 12%. Film tipis TiO2-Co menunjukkan sifat feromagnetisme pada suhu ruang. Kehadiran elemen magnetik Co tidak menghilangkan karakteristik semikonduktif TiO2. Namun, resistansi film bertambah dengan bertambahnya kandungan Co.
THE MICROSTRUCTURES OF HYDROXYAPATITE POWDER FROM PRECIPITATION METHOD IN DIFFERENT SOLUTION Ratih Langenati; Basril Abbas; Widjaksana Widjaksana; Basuki Agung Pudjanto; Nusin Samosir
Jurnal Sains Materi Indonesia Vol 9, No 1: OKTOBER 2007
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (964.057 KB) | DOI: 10.17146/jusami.2007.9.1.4824

Abstract

THE MICROSTRUCTURES OF HYDROXYAPATITE POWDER FROM PRECIPITATION METHOD IN DIFFERENT SOLUTION. Biomaterial is conceptually defined as a bioactive material which can undergo chemical reactions in the body only at its surface and the surface reactions lead to bonding of the tissues at the interface. From the requirements point of view, one of the prospective biomaterials is hydroxyapatite sometimes called hydroxylapatite (HA) with a chemical formula of Ca10(PO4)6(OH)2. In the present study we used calcium hydroxide and phosphoric acid as the Ca2+ and PO4 3- source, while water and synthetic body fluid (SBF) solutions as parameter. Microstructure characterization of the synthesized HA powders was performed using Scanning/Scanning Transmission Electron Microscopy (SEM/STEM) and Fourier Transformed Infra Red (FT-IR) Spectrometry. From the micrographs, it shows that the HApowder from water solution has a rounded shape and the diameter of about 100 nm. The other HA powder using SBF solution shows needle like shape and the elongation is about 50-100 nm. Different powder drying method applied in the HA synthesizing exhibit difference micrographs especially for HA from SBF.
PEMBUATAN DAN KARAKTERISASI KOMPOSIT BIOPLASTIK BERBASIS FILLER CELLULOSE MICRO FIBERS RAMI Edi syafri; Anwar Kasim; Hairul Abral; Alfi Asben; Sudirman Sudirman
Jurnal Sains Materi Indonesia Vol 19, No 2: JANUARI 2018
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jsmi.2018.19.2.4146

Abstract

Pada penelitian ini telah diproduksi dan dikarakterisasi komposit bioplastik dari partikel selulosa serat rami (Cellulose Micro Fibers/CMF) untuk memperkuat komposit bioplastik bermatriks pati tapioka. CMF rami diproduksi menggunakan metode milling (CMFM) dan ultrasonikasi (CMFU) dengan ukuran masing-masing adalah 3,51 µm dan 0,388 µm. Pembuatan dan karakterisasi komposit bioplastik dilakukan dengan metode casting menggunakan gliserol sebagai plastisizer, dan penambahan filler CMF rami. Sifat fisik, kekuatan tarik, struktur dan termal komposit bioplastik dikarakterisasi menggunakan SEM, UTM, XRD, dan DSC. Hasil pengujian menunjukkan bahwa ukuran dan konsentrasi CMF secara signifikan mempengaruhi fisik bioplastik komposit. Dari hasil SEM menunjukkan bahwa filler CMF berinteraksi dengan matriks pati tapioka, dimana bioplastik dengan CMF rami berukuran kecil memperlihatkan struktur kompak dan permukaan yang lebih homogen. Nilai optimum kekuatan tarik terjadi pada penambahan 8% (w/w) CMF rami dari hasil ultrasonikasi dan milling masing-masing meningkat menjadi 3,31MPa dan 2,71MPa dari 1,64 MPa. Sebaliknya pada sifat termal sedikit berpengaruh dengan penambahan CMF rami. Analisis Difraksi Sinar-X menunjukkan kristalinitas komposit bioplastik meningkat dengan penambahan CMF rami dari 8,65 % menjadi 20,21 % untuk CMFM dan 15,12% untuk CMFU.
RAT BLOOD PROFILE EVALUATION AFTER Fe3O4/CHITOSAN COLLOID INJECTION Aloma Karo Karo; Irham Abdul Azis; Wildan Z.L.; Grace Tj. Sulungbudi; Berry Juliandi; Mujamilah Mujamilah
Jurnal Sains Materi Indonesia Vol 20, No 3: APRIL 2019
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (807.897 KB) | DOI: 10.17146/jsmi.2019.20.3.5479

Abstract

RAT BLOOD PROFILE EVALUATION AFTER Fe3O4/CHITOSAN COLLOID INJECTION. The application of iron oxide (Fe3O4) magnetic nanoparticles in the biomedical field is still being explored, mainly related to its toxicity and side effects. This article reported results of the study aimed at analyzing the effect of chitosan-coated magnetic nanoparticles (NPM-C) on rat blood profiles. Magnetic colloid as much as 1 ml (concentration of 5 mg NPM-C / mL aquabidest) for 1 kG rat body weight was injected through intra-venous to the treated rat group (4 Wistar rats aged 6 months; weight ± 275 grams; male sex) while another four rats injected with sterile aquabidest used as a control group. The blood taking from each group of rats was carried out on 1 day before injection and several days after injection (days 1, 7, 14, 21, 28) through veins in the tail. To these blood samples, a series of blood profile analyzes is carried out including basic hematology, blood chemistry, and fragility of the erythrocyte membrane. The results of the analysis showed no significant differences between blood profiles after treatment and control, which indicated that chitosan-coated magnetic nanoparticles did not trigger cellular stress responses in the blood. The stability of blood magnetism analyzed by VSM (Vibrating Sample Magnetometer) also shows that magnetic nanoparticles are detected in the blood and tend to decrease in number with increasing time, so it is thought that these nanoparticles can be degraded or have been distributed into organs. These stable properties are analyzed due to an existence of chitosan coating around magnetic nanoparticles. Based on this study it can be concluded that up to the given concentration limit, iron oxide nanoparticles coated by chitosan are not toxic and have the potential to be used as drug carriers, MRI contrast agents, and other biomedical applications.

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