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JURNAL KIMIA SAINS DAN APLIKASI
Published by Universitas Diponegoro
ISSN : 14108917     EISSN : 25979914     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering
urnal Kimia Sains dan Aplikasi (p-ISSN: 1410-8917) and e-ISSN: 2597-9914) is published by Department of Chemistry, Diponegoro University. This journal is published four times per year and publishes research, review and short communication in field of Chemistry.
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Articles 6 Documents
 1 
Search results for , issue "Vol 3, No 1 (2000): Volume 3 Issue 1 Year 2000" : 6 Documents clear
Hidrasi Metilisoeugenol dengan Metode Oksimerkurasi-Demerkurasi Ngadiwiyana, Ngadiwiyana
Jurnal Kimia Sains dan Aplikasi Vol 3, No 1 (2000): Volume 3 Issue 1 Year 2000
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3413.323 KB) | DOI: 10.14710/jksa.3.1.153-158

Abstract

Telah dilakukan hidrasi metilisoeugenol dengan metode oksimerkurasi-demerkurasi. Metilisoeugenol merupakan hasil isomerisasi metileugenol. Reaksi oksimerkurasi-demerkurasi dilakukan pada suhu 25°C. Pada tahap oksimerkurasi digunakan campuran merkuri asetat dengan pelarut THF + H2O dengan perbandingan volume (1:1), sedangkan pada tahap demerkurasi digunakan pereduksi NaBH4, dalam NaOH. Hasil reaksi berupa cairan berwama putih. Kemurnian hasil ditentukan dengan kromatografi gas, dihasilkan senyawa l-(3,4-dimetoksifenil)-1-propanol dengan kemurnian 19,20%. Analisis struktur dilakukan dengan spektrofotometer IR dan kromatografi gas-spektrometer massa.
Reduksi Senyawa 6-Amino-5-Nitroso Urasil Menjadi 5,6-Diaminourasil (Studi Pendahuluan) Suhartana, Suhartana; Rusdiarso, Bambang; Narsito, Narsito
Jurnal Kimia Sains dan Aplikasi Vol 3, No 1 (2000): Volume 3 Issue 1 Year 2000
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4090.218 KB) | DOI: 10.14710/jksa.3.1.177-181

Abstract

Telah dilakukan sintesis dan reduksi senyawa 6-amino-5-nitroso urasil (6-A-5-NU) menjadi 5,6 diaminourasil (DAU). Analisis kualitatif dilakukan dengan penentuan titik leleh dan spektra IR. Senyawa 5,6- Diaminourasil (DAU) disintesis dari urea dan etilsianoasetat dalam suasana enolat. Reaksi diawali dengan melalui pembentukan senyawa hasil antara senyawa 6-aminourasil, dan 6-Amino-5-Nitroso Urasil (keduanya madya yang stabil), sebelum diperoleh senyawa hasil akhir DAU. Hasil DAU yang diperoleh mempunyai titik leleh 249-254°C (literatur 257-258°C) dan rendemen yang diperoleh adalah 80,86%, kondisi optimum diperoleh dengan memakai reduktor amonium sulfida, dan suhu 40°C.
Mekanisme Transport Lantanum Melalui Membran Cair Berpendukung (SLM) dengan Senyawa Pengemban campuran Tributyl Phosphate (TBP) dan Di(2-Etyl-Hexyl) Phosporic Acid (D2EHPA) Muhammad Cholid Djunaidi; Buchari Buchari
Jurnal Kimia Sains dan Aplikasi Vol 3, No 1 (2000): Volume 3 Issue 1 Year 2000
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5466.851 KB) | DOI: 10.14710/jksa.3.1.163-170

Abstract

Telah dilakukan penelitian tentang mekanisme transpor logam lantanum melalui membran cair berpendukung (SLM). Sebagai membran pendukung digunakan politetrafluoroetilen (PTFE) yang diaktifkan dengan cara merendamnya dalam campuran senyawa pengemban asam di-2-etilheksilfosfat (D2EHPA) dan tributilfosfat (TBP) dengan pelanit kerosene. Efek sinergi antara kedua senyawa pengemban tersebut dipelajari dengan SLM. Pemantauan konsentrasi logam lantanum di fasa air dilakukan secara spektrofotometri UV-Vis dengan menggunakan natrium alizarin sulfonat (NAS) sebagai senyawa pembentuk warna dan diukur pada panjang gelombang 528 nm. Transpor melalui SLM dipengaruhi oleh gradien konsentrasi, yaitu pH, kekuatan ion, serta senyawa pengemban. Transpor logam lantanum dengan senyawa D2EHPA memperlihatkan keterlibatan ion hidrogen, dan tidak untuk ion nitrat. Hal ini berlawanan dengan TBP. Sedangkan transpor dengan campuran kedua pengemban (perbandingan 0,2 MTBP 0,8 M D2EHPA) memperlihatkan sifat seperti komponen utamanya (D2EHPA). Senyawa pengemban campuran TBP-D2EHPA memberikan efek sinergi denganbertambahnya fraksi mol D2EHPA.
Demetilasi Senyawa N-metilpiridinium iodida dengan Pemanasan pada Pelarut Polar Aprotik Cahyono, Bambang; Ismiyarto, Ismiyarto; Suradi, Agus; Suzery, Meiny
Jurnal Kimia Sains dan Aplikasi Vol 3, No 1 (2000): Volume 3 Issue 1 Year 2000
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2838.951 KB) | DOI: 10.14710/jksa.3.1.147-181

Abstract

Reaksi Demetilasi dengan anion iodida telah dilakukan terhadap senyawa N-Metilpiridinium Iodida. Reaksi berlangsu pada Suhu titik didih asetonitril, 82 Celsius. Analisis Produk Reaksi dengan Spktrofotometer UV-Vis, mengindikasikan bahwa reaksi demetilasi garam N-metilpiridinium iodida telah berlangsung. hasil Penelitian menunjukan bahwa amonium heterosiklik aromatik lebih mudah terdemetilasi daripada amonium heterosiklik nanoaromatik.
Analysis of Dispersed Phase of Coconut Milk Emulsion Hudiyanti, Dwi
Jurnal Kimia Sains dan Aplikasi Vol 3, No 1 (2000): Volume 3 Issue 1 Year 2000
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2103.62 KB) | DOI: 10.14710/jksa.3.1.159-162

Abstract

Experiments were conducted to study the dispersed phase of coconut milk emulsion. They were optical microscopy analysis using a Nikon Microscope and particle size analysis using a Coulter Counter Multisizer. Particle size analysis using a Coulter Counter Multisizer on both original coconut milk and homogenized coconut milk at T = 19 °C indicated that they had a wide range of particle size with average value of 5.988 + 1 .0 pm and 6.696 + 1 . 1 pm in diameter respectively. Optical microscopy analysis showed that homogenization of coconut milk after it was heated in a water bath at T = 35 °C for about 15 minutes resulted in changes of particle size, the particle size became smaller. The result lead to a conclusion that the coconut milk emulsion may be considered as a polydisperse emulsion and it indicates that the system should not be sensitive to small variations in preparation or subsequent handling.
Bilangan Oksidasi dan Reaksi-Reaksi Mangan Sriyanti, Sriyanti
Jurnal Kimia Sains dan Aplikasi Vol 3, No 1 (2000): Volume 3 Issue 1 Year 2000
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4866.627 KB) | DOI: 10.14710/jksa.3.1.171-176

Abstract

Telah dilakukan pembuatan tris (2,4-pentanadionato) Mangan (III), Kalium manganat dan Kalium permanganat untuk mempelajari bilangan oksidasi mangan. Dilakukan pula reaksi-reaksi sederhana terhadap mangan untuk mengamati mangan pada berbagai keadaan tingkat oksidasi. Hasil yang diperoleh menunjukan bahwa Mangan (II) stabil dalam suasana asam, Mangan (III) tidak stabil dan dapat distabilkan dengan pembentukan kompleks mangan-acetylacetonat, Mangan (IV) stabil dalam bentuk oksidanya (MnO2), Mangan (VI) atau manganat stabil dalam suasana basa kuat dan Mangan (VII) atau permanganat hanya stabil dalam suasana asam.

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