Ratlan Pardede
Pusat Pengembangan Radioisotop dan Radiofarmaka, BATAN, Serpong.

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SINTESA 1,2-BIS(FOSFINO) ETANA UNTUK PREPARASI TETROFOSMIN DAN SENYAWA TURUNANNYA Purwoko, Purwoko; Pardede, Ratlan; Maskur, Maskur; Mutalib, Abdul; Hashimoto, K.
Jurnal Radioisotop dan Radiofarmaka Vol 9 (2006): jurnal PRR 2006
Publisher : Jurnal Radioisotop dan Radiofarmaka

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Abstract

SINTESA 1,2-BIS(FOSFINO) ETANA UNTUK PREPARASI TETROFOSMIN DAN SENYAWA TURUNANNYA. Senyawa 1,2-bis (fosfino)etana adalah senyawa khelat bidentat sederhana dengan atom fosfor sebagai donor ligan. Telah dilakukan sintesa 1.2bis(fosfino)etana melalui dua tahap: reaksi trietil fosfit dengan 1,2 dibromo etana didapat senyawa tetra etil etilen difosfonat (fosforan), reduksi fosforan dengan LiAlH4 diperoleh senyawa fosfin 1.2- bis(fosfino)etana. Analisa hasil dari setiap tahap reaksi dilakukan dengan mengamati spektrum infra merah, spektrum massa serta kromatografi cairan dan telah diperoleh hasil senyawa fosfin 1,2 bis-(fosfino) etana sebagai starting material dalam sintesa tetrofosmin dan senyawa turunannya dengan kemurnian lebih 98 % dan rendemen sebesar 34%. Kata kunci: 1,2-bis (fosfino)etana, khelat bidentat, sintesa SYNTHESIS OF 1.2-BIS(PHOSPHINO)ETHANE FOR PREPARATION OF TETROFOSMINE AND DEREVATIVES. 1.2-bis(phosphino)ethane is a simple chelate bidentate based on phosphorous as a donor ligands . The 1.2-bis(phosphino)ethane was synthesized through two steps reaction: triethyl phosphite was coupled with dibromo ethane to give tetra ethyl ethylene diphosphonate (phosphorane), the reduction of phosphorane by LiAlH4 gave the phosphine compound 1.2-bis(fosfino)etana. Investigation of the product every steps reaction by observing infra red spectra, as well as mass spectrometric and high performance liquid chromatographic analysis showed that the product was pure phosphine 1,2 bis-(phosphino) ethane as starting material in the synthesis of tetrofosmine and derivatives, the purity more than 98% and yield was around 34 %. Key words: 1.2-bis(phosphino)ethane, chelate bidentate, synthesis.
UJI BIODISTRIBUSI DAN UJI PREKLINIS MIKROSFER GELAS-P-32 UNTUK PENGOBATAN KANKER Astuti, Laksmi Andri; Caniago, Djoharly; Pardede, Ratlan; Widjaksana, Widyastuti; Purwoko, Purwoko; Bagiawati, Sri; Setiyowati, Sri; Abidin, Abidin; Aguswarini, Sri
Jurnal Radioisotop dan Radiofarmaka Vol 6, No 2 (2003): Jurnal PRR 2003
Publisher : Jurnal Radioisotop dan Radiofarmaka

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ABSTRAKUJI BIODISTRIBUSI DAN UJI PREKLINIS MIKROSFER GELAS-P-32 UNTUK PENGOBATAN KANKER.Radiofarmaka telah  menunjukkan  manfaat lebih unggul dan spesiflk biladibandingkan dengan teknik pelayanan kesehatan lain, terutama untuk keperIuan diagnosis dan terapi beberapa penyakit  mematikan seperti kanker. Mikrosfer gelas-P-32 ( P-32 GMS ) adalah  salah  satu sediaan  baru  radiofarmaka untuk terapi  dengan cara  radiasi  interna beberapa penyakit  kanker ganas  seperti  penyakit  kanker  hati. Mikrosfer  gelas-P-32 ini  disiapkan  dengan  cara  mengira diasikan mikrosfer gelas-P31dengan neutron di reaktor nuklir, kemudian sediaan disuntikkan ke daerah yang terkena kanker Untukmemudahkan  penyuntikan  pada  sediaan  ini  perlu ditambahkan larutan pensuspensi, yaitu campuran dari PVP 16 %, dekstrose 50% dan salin. Mengingat ukuran mikrosfer ini spesiflk yaitu 40-60 J.Ull  maka pemilihan jamm suntik perIu dilakukan agar P-32 GMS yang diinjeksikan maksirnal bisa masuk ke daerah sasaran, dan mikrosfer tidak mengalami kerusakan karena gesekan dengan permukaan dalam  jarum. Ujibiodistribusi perIu dilakukan untuk melihat apakah P-32 GMS yang telah diinjeksikan terak1.lmulasike daerah penyuntikan  atau  terdistribusi  ke organ - organ lain yang  tidak dikehendaki, Hewan percobaan yang dipakai  adalah  mencit dengan penyuntikan dilakukan  pada otot  paha  kanan. Hasil biodistribusi pada I, 3dan  24 jam  setelah  injeksi  menunjukkan 100% aktivitas P-32 GMS terakumulasi di daerah penyuntikan.Hasil biodistribusi pada 5 jam setelah penyuntikan menunjukkan adanya penimbunan  aktivitas di organ lambung selain penimbunan aktivitas di daerah penyuntikan, namun hal ini diduga karena terjadi kontaminasi akibat kesalahan kerja .Kata Kunci : Radiofarmaka, , Mikrosfer gelas, P-32,  iradiasi, uji biodistribusi , kanker. ABSTRACTBIODISTRIBUTION AND PRECLINICAL TEST OF P-32 GLASS MICROSPHERESFOR CANCER THERAPY. The superiority of  radiophannaceutical compare to the  other  techniques off medical services, especially for diagnosis and  therapy  of  several deadly diseases such as cancer, shows that this technique is more specific and accurate. P-32-Glass microsphere (P-32 GMS) is one of theradiophannaceuticals developed reccntly for therapy using  interrnal  radiation  method  for several malignant cancers, such as hepatic canccr. 111cP-32 GMS was prcpared by irradiating P-31 GMS with neutron at a nuclear reactor, then the preparation was injected to the cancerous infected  area. To make easy  injection, it needs suspension agent that was including PVP, dextrose and saline with a composition of 16% PVP - 50%dextrose - saline as 2 : 3 : 3 (v/v/v). As microsphere size should be maintained at 40-60 11m, the injectionneedle was selected properly in order to remain the particle size of P-32 GMS unchanged  when  the frictionoccurs between microspheres and the inside surfaces of the needle. The injection  needle  used  was needle produced  by BD with a typical size of 20 GI Tw. Biodistribution  studies were carried out after I, 3, 5 and24 hour of injection. Experimental results  for 1, 3 and 24 hour post -injection studies showed  that 100%activity of  P-32 GMS was accumulated  at  the  injected  area. For 5 hour post-injection study, accumulation of  P-32 GMS activity was also found at stomach besides the injected area, but it was presured as working error. Keywords: Radiophannaceutical , glass microspheres ,P-32,  biodistribution, , cancer.    
Pengaruh Kepemimpinan, Komitmen Organisasi dan Lingkungan Kerja terhadap Prestasi Kerja melalui Kepuasan Kerja Karyawan Sebagai Variabel Intervening Pada PT. KSK Insurance Indonesia Pardede, Ratlan
Journal of Business and Applied Management Vol 9, No 1 (2016): JOURNAL OF BUSINESS & APPLIED MANAGEMENT
Publisher : Universitas Bunda Mulia

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This study aims to determine the influenceof leadership, organizational commitment, working environment towardemployeeperformance through working satisfaction as intervening variable. This research was conducted at PT KSK Insurance Indonesia by using total sample of 180 employees. Structural Equation Modeling (SEM) by AMOS program version 22 used to test the hypothesis. The study concludes : (1)leadership has positive effect but not significant on working satisfaction, (2)commitment has positive and significant effect on working satisfaction, (3)working environment has positive and significant effect on working satisfaction, (4)leadership has positive effect but not significant on employee performance, (5)commitment has positive and significant effect on employeeperformance, (6)working environment has positive and significant effect on workingperformance, (7)working satisfaction has positive and significant effecton employeeperformance;Key Words: Leadership, organizational commitment, working environment, working satisfaction and employee performance.
PENGARUH PERSEPSI HARGA DAN KUALITAS PRODUK TERHADAP KEPUTUSAN PEMBELIAN KONSUMEN YANG DIMEDIASI KEPUASAN KONSUMEN Pardede, Ratlan; Haryadi, Tarcicius Yudi
Journal of Business and Applied Management Vol 10, No 1 (2017): JOURNAL OF BUSINESS & APPLIED MANAGEMENT
Publisher : Universitas Bunda Mulia

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This study aims to determine the influence of the perception of price and product quality on consumer purchasing decisions which is mediated by satisfaction on Indomaret mini market Rorotan North Jakarta. Indomaret mini market is engaged in the retail sale of goods which needs to pay attention to the behavior of consumers to make decisions.This research is a quantitative survey approach that seeks to know how the influence of the perception of price and product quality on consumer purchasing decisions with customer satisfaction as an intervening variable. Data collection techniques are by using questionaire. The test instrument is used for testing the validity and reliability. As for the technique of data analysis, SEM is used. The study concludes : 1) price perception has a positive and significant effect on customer satisfaction, 2)price perception has not positive and significant effect on consumer purchasing decisions, 3) product quality has a positive and significant effect on customer satisfaction, 4) product quality has not positive and significant effect on consumer purchasing decisions, 5). consumer satisfaction has a positive and significant effect on consumer purchasing decisions, 6). Consumer satisfaction has effect on consumer purchasing decision to mediate price perception and product quality.Keywords: price, product, consumer satisfaction, consumer purchasing