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PEMISAHAN Mn-54 DARI HASIL IRADIASI Fe2O3 ALAM MENGGUNAKAN RESIN PENUKAR ANION

Jurnal Radioisotop dan Radiofarmaka Vol 8 (2005): JURNAL PRR 2005
Publisher : Jurnal Radioisotop dan Radiofarmaka

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Abstract

PEMISAHAN Mn-54 DARI HASIL IRADIASI Fe2O3ALAM MENGGUNAKAN RESIN PENUKAR ANION. Pembuatan radioisotop dari iradiasi target alam mempunyai keuntungan yaitu biaya produksi lebih murah, namun radioisotop yang dihasilkan mungkin mengandung radionuklida pengotor. Pembuatan Mn-54 dari iradiasi Fe2O3 alam mempunyai masalah yaitu dihasilkan juga radioisotop Fe-59. Pemisahan Mn-54 dari iradiasi Fe2O3 alam dapat dilakukan dengan melarutkan Fe2O3 alam dengan HCl kemudian hasil pelarutan dipisahkan dengan dowex 1x 8Cl- form. Telah dilakukan proses pemisahan Mn-54 dari Fe2O3 alam yang telah diiradiasi, dengan cara melarutkan Fe2O3 alam dengan HCl kemudian hasil pelarutan dipisahkan dengan dowex 1x 8Cl- form dengan variasi waktu kontak dan kosentrasi HCl yang berbeda. Hasil pemisahan Mn-54 dari hasil iradiasi Fe2O3 menunjukkan pada konsentrasi HCl 8 N dan waktu kontak 90 menit memberikan efisiensi pemisahan yang baik yaitu 7,55 % untuk Mn-54 dan 94,13% untuk Fe-59. Kata kunci:Pemisahan, Mn-54, resin penukar anion SEPARATION of Mn-54 FROM IRRADIATED NATURAL Fe2O3 USING ANION EXCHANGE RESIN. Preparation of radiosisotope from natural target has an advantage namely the production is cheaper, but the produced radioisotope may content radionuclidic impurities. Preparation of Mn-54 from irradiated natural Fe2O3 has a problem due to Fe-59 impurity . The separation of Mn-54 from irradiated natural Fe2O3 has been carried out by means of solving irradiated target using HCl and dowex resin 1 x 8 Cl form. The separation of Mn-54 from iradiated natural Fe2O3 showed a good result by 8 N HCl concentration and 90 minute contact time and efficiency was 7,55 % Mn-54 and 94,13 % for Fe-59. Key words: Separation, Mn-54 , anion exchange resin

Stability of Silver Nanoparticles as Imaging Materials

The Journal of Pure and Applied Chemistry Research Vol 5, No 3 (2016)
Publisher : Chemistry Department, The University of Brawijaya

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Abstract

Determining the stability of silver nanoparticles is a very important process. It was associated with unwanted metal charge and materials properties. Therefore, we studied to synthesis and stability of silver nanoparticles (AgNPs). The synthesis was performed by reduction method used sodium borohydride (NaBH4). Silver nitrate solution 0.0005 M in 1 mL was reduced using 1 mL 0.002 M of NaBH4. Then a 40.0 mL of polyvinylpyrrolidone 0.3% and 20 mL of 1.5 N NaCl was added to the mixture. Characterization of silver nanoparticles is undertaken using spectrophotometer UV-Vis, transmission electron microscopy, particle size analyzer and zeta potential. The stability of products is observed for 5 times using spectrophotometer UV-Vis. The product was characterized by determining its surface plasmon resonance (SPR) of AgNPs and the result was obtained at 403 nm. The size of AgNPs was 20 nm using tomography emission microscopy analysis and the particle size distribution give 5.8 nm. The dielectric charge was 53 mV. The stable AgNPs showed no significant SPR shift at 402±0.89 nm wavelength during 5 days observation. Based on the size and stability, it was suitable for imaging materials.

Clearance profile of radioactive gold nanoparticle (198Au) conjugates-poliamidoamin generation 4-nimotuzumab ; potential radio-pharmaceutical theranostic agent

Pharmaciana Vol 7, No 2 (2017): Pharmaciana
Publisher : Universitas Ahmad Dahlan

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Abstract

Theranostic agents are agents that combine diagnostic and therapeutic capabilities into a single agent. The presence of conjugated cancer which is therapeutic agents such as nimotuzumab monoclonal antibodies with radioactive gold nanoparticles stabilized with Polyamidoamine Generation 4 (PAMAM G4) dendrimer can actively interact with specific cancer cells. Radioactive gold (198Au) as a radiation transmitter β (961 keV) capable for killing cancer cells and (412 keV) γ rays that give a golden image in the body, thus acting as a theranostic agent. The purpose of this study was to obtain confident results of conjugate safety by observing the constituent clearance of 198AuNP-PAMAM G4-Nimotuzumab. The result of the conjugate clearance will be the reference for the metabolic state as a new, stable and complete radiofarmaka upon reaching the desired target. This study began with the synthesis of the conjugate of 198AuNp-PAMAM G4-nimotuzumab and then tested the clirens and analyzed the results of urine and mouse feces that had been injected with conjugate. Total clearance was obtained about 47.38% of the 198AuNP-PAMAM G4-Nimotuzumab conjugates that have been excreted through urine (18.26%) and stool (29.11%.). Urine and feces were analyzed with SDS-PAGE giving the spot above the 150 kDa band and showing the conjugate molecular weight. FTIR analysis of urine and feces by showing aldehyde functional groups (C = O), alcoholic groups (O-H), amine groups (C-N), and amine groups (N-H) indicating the presence of AuNP-PAMAM G4-Nimotuzumab conjugates in urine and mouse feces. The results of urine and fecal excretion of the conjugate are still conjugate-shaped supported by SDS PAGE analysis, UV-Vis spectrophotometer absorption analysis and functional group analysis with FTIR that has been conducted.

Influence Of Drying Time And Temperature On Zirconium-Based Material (ZBM) Properties For 99Mo/99mTc Generator Development

Jurnal Kimia dan Kemasan Vol. 40 No. 2 Oktober 2018
Publisher : Balai Besar Kimia dan Kemasan

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Abstract

Zirconium-based material (ZBM) has an important role in producing Technetium-99m (99mTc) due to its high adsorption capacity to Molybdenum-99 (99Mo). The adsorption capacity of the ZBM depends on the specific surface area which is influenced by several parameters in the synthesis process. This study aims to investigate the influence of drying time and temperature on the structure and specific surface area of the ZBM. Synthesis of the ZBM was carried out using zirconium chloride, 2-propanol, water and tetrahydrofuran at 75 °C, 90 °C and 120 °C and for 3 hr, 5 hr and 7 hr, respectively. Functional group and specific surface area of the ZBM was analyzed by FTIR and BET method, respectively. At the variation of drying time, the functional group pattern showed by FTIR spectra was not significantly different. The O-H group of the ZBM increased as the drying temperature decreases. At 75 and 90°C, the specific surface area increased as the function of time was increased but was decreased at 120°C. The highest surface area of the synthesized ZBM had a poor performance as a 99Mo/99mTc generator material, whereas the eluate met the required standard.

Profil Distribusi dan Klirens Pengkontras CT SCAN AuNP-PAMAM G4- NIMOTUZUMAB disimulasikan menggunakan Senyawa 198AuNP-PAMAM G4-NIMOTUZUMAB

Jurnal Kimia Terapan Indonesia (Indonesian Journal of Applied Chemistry) Vol 18, No 01 (2016)
Publisher : Research Center for Chemistry - LIPI

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Abstract

Riset nanopartikel emas sebagai senyawa pengkontras CT-Scan telahdimulai sejak 3 tahun lalu di Indonesia. Riset interaksi antibodi monoklonal,khususnya nimotuzumab, dengan reseptor EGFR/HER1 dimulai sejak lima tahun lalu dan telah dimanfaatkan untuk penyiapan senyawa pengkontras MRI (Magnetic Resonance Imaging) spesifik target melalui pelabelan konjugat dendrimer-nimotuzumab dengan radionuklida. Sintesis senyawa AuNP-PAMAM G4-Nimotuzumab untuk diagnosis dan terapi pada kanker paru-paru telah berhasil dilakukan di PTRR dan hasil karakterisasinya dengan menggunakan beberapa metode seperti KCKT (Kromatografi Cair Kinerja Tinggi), SDS (Sodium Dodecyl Sulphate) page elektroforesa dan TEM (Transmission Electron Microscopy) menunjukkan bahwa senyawa yang terbentuk adalah sebagai AuNP-PAMAM G4-Nimotuzumab. Pada penelitian ini telah dilakukan uji pre klinis dari senyawa pengkontras AuNPPAMAM G4-nimotuzumab meliputi uji distribusi dan klirens dengan disimulasikan menggunakan senyawa radioaktiv 198AuNP-PAMAM G4- nimotuzumab. Hasil uji distribusi senyawa 198AuNP-PAMAM G4- nimotuzumab menunjukkan penimbunan pada beberapa organ seperti ginjal, hati dan limpa, sedangkan dari hasil uji klirens diperoleh waktu paruh biologis senyawa tersebut adalah 11.77 hari. Hasil pemeriksaan terhadap urin dengan menggunakan kolom PD-10 (Sephadex G25) menunjukkan bahwa ~ 85 % yang dikeluarkan lewat urin masih berbentuk AuNP-PAMAM G4- Nimotuzumab. Hasil pencitraan dengan alat autoradiography menunjukkan bahwa sampai dengan 48 jam setelah penyuntikan, akumulasi radioaktivitas yang terdeteksi masih terdapat pada hati. 

Pembuatan, Karakterisasi dan Uji In Vitro Nanopartikel Emas Berbasis Konjugat Gom Arab-Vinkristin

JURNAL ILMU KEFARMASIAN INDONESIA Vol 16 No 1 (2018): JIFI
Publisher : Fakultas Farmasi Universitas Indonesia

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Abstract

Gold nanoparticles (AuNP) are potentially developed as nanomedicine because AuNP is easily synthesized, functionalized, and biocompatible. With gum arabic as a stabilizer, vincristine was conjugated with gold nanoparticles. As a reducing agent, it used 0.02 M Natrium Boro Hidrat (NaBH4)  solution. Gold nanoparticles (AuNP) coated with conjugated gum Arabic (GA) and vincristine (VCR) were successfully synthesized and characterized. The conjugation of GA-VCR and AuNP displayed a narrow hydrodynamic particle size distribution with average size < 100 nm by TEM and  PSA (particle size analyzer). We investigated the cytotoxic activity of conjugated vincristine-gum arabic-gold nanoparticle by tetrazolium salt assay (MTT) using cancer cell line CCR-CEM. Cytotoxic activity of conjugated VCR-GA-AuNP before and after purification by Size Exclusion Chromatography (SEC), against leukemia cell line CCRF-CEM, was described by IC50 value. All formulation had a cytotoxic of activity with IC50 <20 μg/ml. The IC50 of samples against CCRF cell line were 1,026 μg/mL and  2,607 ug/mL, respectively.