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JURNAL KIMIA SAINS DAN APLIKASI

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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 796 Documents

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Identifikasi Senyawa Penyusun Minyak Kulit Batang Kayu Manis (Cinnamomum cassia) Menggunakan GC-MS Prasetya, Nor Basid Adiwibawa; Ngadiwiyana, Ngadiwiyana
Jurnal Kimia Sains dan Aplikasi Vol 9, No 3 (2006): Volume 9 Issue 3 Year 2006
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

The steam-distilled volatile oil of the cinnamon bark (Cinnamomum cassia) has been analysed by gas chromatography â€“ mass spectrophotometer (GC-MS). It was resulted three chromatogram peaks, there were identified as cinnamaldehyde (91.18 %), eugenol (7.64 %) and cinnamyl acetate (1.18 %) respectively.Keywords: Cinnamomum cassia, GC-MS, Cinnamadehyde, eugenol, cinnamyl acetate

Silica Magnetite Adsorbent: Effect of Drying Temperature of Silica Sol Gel on Magnetite Core Structure Endang Sawitri; Choiril Azmiyawati; Parsaoran Siahaan
Jurnal Kimia Sains dan Aplikasi Vol 21, No 3 (2018): Volume 21 Issue 3 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Recently, magnetite was investigated as water purification adsorbent because it’s unique magnetic properties that improved the adsorption efficiency through desorption process. But magnetite oxidized into maghemite/hematite with the increase of temperature. This transformation should be avoided to maintain the magnetic properties of magnetite. In this research magnetite separated from iron sand by magnetic extraction then coated with silica via sol gel method. The effect of drying temperature in sol gel had change the magnetite core structure into maghemite and found no formation of hematite at 350⁰C. Silica coating proved had protected magnetite from transformation into hematite due to drying temperature until 350⁰C .

Efektivitas Fotodegradasi Amoksisilin yang Dikatalisis dengan TiO2 dengan Keberadaan Ion Ag(I) Devina Ingrid Anggraini; I Pujilestari
Jurnal Kimia Sains dan Aplikasi Vol 20, No 3 (2017): Volume 20 Issue 3 Year 2017
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Pemakaian obat dan sediaannya secara intensif, selain memberikan keuntungan dalam pelayanan kesehatan juga memiliki efek sekunder yaitu akumulasi limbah yang tidak diinginkan. Akumulasi zat antibiotik seperti amoksisilin di perairan dapat menyebabkan resistensi. Di lingkungan, limbah amoksisilin dapat bersama-sama dengan limbah anorganik seperti ion Ag(I). Kajian tentang fotodegradasi dilakukan dengan menggabungkan cahaya ultraviolet dan partikel semikonduktor sebagai fotokatalis. Hal tersebut dilakukan untuk mengetahui pengaruh penyinaran, keberadaan ion Ag(I), dan kondisi optimum terhadap efektivitas fotodegradasi amoksisilin yang dikatalisis TiO2dengan kehadiran ion Ag(I). Proses fotodegradasi amoksisilin dilakukan dalam suatu reaktor tertutup dilengkapi dengan satu set alat pengaduk magnetik dan lampu UV. Hasil kemudian dianalisis dengan Spektrofotometer UV untuk mengetahui konsentrasi amoksisilin sisa dan Spektrofotometer Serapan Atom (SSA) untuk mengetahui konsentrasi ion Ag(I) sisa. Hasil penelitian menunjukkan bahwa amoksisilin yang terdegradasi meningkat dengan semakin lamanya waktu penyinaran karena lamanya kontak antara fotokatalis TiO2 dengan cahaya dan kontak antara amoksisilin dengan radikal •OH. Keberadaan ion Ag(I) meningkatkan hasil fotodegradasi amoksisilin karena rekombinasi radikal •OH yang berasal dari spesies hole dengan elektron tereksitasi dapat dicegah. Efektivitas fotodegradasi amoksisilin terjadi pada waktu penyinaran 90 menit, larutan amoksisilin 200 mg/L sebanyak 25 mL dengan penambahan ion Ag(I) 40 mg/L sebanyak 25 mL, dan TiO2 sebagai katalis sebanyak 20 mg. Pada kondisi tersebut fotodegradasi amoksisilin sebesar 32,40 % dan persen ion Ag(I) yang tereduksi sebesar 70,40 %.

The Effect of KMnO4 and K3[Fe(CN)6] Concentrations on Electrical Production in Fuel Cell Microbial System with Lactobacillus bulgaricus Bacteria in a Tofu Whey Substart Ilmi Muftiana; Linda Suyati; Didik Setiyo Widodo
Jurnal Kimia Sains dan Aplikasi Vol 21, No 1 (2018): Volume 21 Issue 1 Year 2018
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Microbial Fuel Cell (MFC) is a bioelectrochemical system that utilize metabolism of microorganisms to produce electrical energy. Microbial fuel cell is a bioelectrochemical system involving redox reactions that required an oxidizing agent in the process The purpose of this study was to determine the effect of various concentration of electrolyte solution KMnO4 and K3[Fe(CN)6] on electricity produced by microbial fuel cell system with Lactobacillus bulgaricus in tofu whey substrate. The principle of this study was bioelectrochemistry that changes chemical energy into electrical energy which involves a redox reaction by utilizing microbes. This study used a microbe Lactobacillus bulgaricus and substrate tofu whey with 0.39 % carbohydrate content in dual chamber MFC system using a salt bridge as a conductor of protons from anode to cathode. Anode compartment contains a mixture of microbes that have been cultured and phosphate buffer with pH 7 while cathode compartment contained electrolytes KMnO4 or K3[Fe(CN)6] in some various concentration that is 0.25 M; 0.2 M; 0.15 M; 0.1 M and 0.01 M with added potassium phosphate buffer pH 7. The MFC system using Lactobacillus bulgaricus and substrate tofu whey with 0.39% carbohydrate content and electrolyte solution KMnO4 generated maximum potential difference of 99.2 mV at concentration of 0.2 M which was higher than system with electrolyte solution K3[Fe(CN)6] 0.2 M that produced maximum potential difference of 48.6 mV.

Pengambilan Ion Logam Mn2+ dan Ni2+ Menggunakan Na-Zeolit: Suatu Usaha Pengkajian Pemanfaatan Sumber Daya Alam Indonesia Didik Setiyo Widodo; Eko Sugiharto; Endang Tri Wahyuni
Jurnal Kimia Sains dan Aplikasi Vol 7, No 2 (2004): Volume 7 Issue 2 Year 2004
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Zeolit alam asal Cikalong Jawa Barat telah digunakan untuk pengambilan ion Mn2+ dan Ni2+ dari larutannya, dengan cara mempertukarkan ion-ion tersebut dengan ion Na+ dalam zeolit alam termodifikasi berdasarkan sistem batch. Penelitian ini juga mengkaji pengaruh keberadaan ion Cu2+ di dalam sistem pertukaran kation. Konsentrasi ion-ion dianalisis dengan metode spektrofotometri serapan atom. Data eksperimen menunjukkan bahwa zeolit alam yang telah dimodifikasi dengan Na+ dapat digunakan untuk mengambil ion Mn2+ dan Ni2+ melalui mekanisme pertukaran kation. Uji selektivitas memperlihatkan bahwa Na-Zeolit lebih selektif terhadap Mn2+ dibandingkan terhadap Ni2+. Urutan selektivitas ini tidak dipengaruhi oleh keberadaan Cu2+. Na-Zeolit mampu mempertukarkan kation Mn2+ sampai 57,73 % dalam keadaan sendiri dan 19,72 % dalam keadaan bersama; Ni2+ sampai 37,71 % dalam keadaan sendiri dan hanya 5,81 % dalam keadaan bersama kation logam lain di dalam larutannya.

Potensi Senyawa Antibakteri dari Ekstrak Akar Manis (Glycyrrhiza glabra L) terhadap Bacillus cereus Gandi Sogandi; Wan Syurya Tri Darma; Raudatul Jannah
Jurnal Kimia Sains dan Aplikasi Vol 22, No 4 (2019): Volume 22 Issue 4 Year 2019
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

The high number of poisoning food and diarrheal diseases caused by Bacillus cereus bacteria has been treated with chemical drugs and traditionally herbal plants. One of the commonly used herbal plants is sweet root (Glycyrrhiza glabra L.). This study aims to extract and fractionate sweet root plants, determine the antibacterial activity and identify the types of bioactive compounds as antibacterial compounds. The extraction process uses a maceration technique and fractionation using buthanol, ethyl acetate, and hexan solvents. Antibacterial activity was carry out by the diffusion method and identification of bioactive compounds by GCMS analysis. This study showed that greatest antibacterial activity was found in ethyl acetate fraction with a strong category and MIC value of 12,5%. This study for the first time also revealed that the types of bioactive compounds from sweet root plants (Glycyrrhiza glabra L.) as antibacterial compounds are n-Hexadecanoic as a fatty acid group and 4H-Pyran 4-one 2.3 dihydro-3, 5-dihydroxy-6 methyl from the flavonoid group.

Recovery Logam Krom (VI) Menggunakan Polymer Inclusion Membran (PIM) dengan Senyawa Pembawa Aliquat 336, Topo dan Campuran Aliquat 336-Topo Khoirin Nita Ulfia; Khabibi Khabibi; Muhammad Cholid Djunaidi
Jurnal Kimia Sains dan Aplikasi Vol 14, No 3 (2011): Volume 14 Issue 3 Year 2011
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Telah dilakukan penelitian tentang recovery logam krom (VI) menggunakan polymer inclusion membran (PIM) dengan senyawa pembawa aliquat 336, TOPO, dan campuran aliquat 336-TOPO. Tujuan penelitian ini adalah untuk menghasilkan PIM, melakukan pemisahan ion krom (VI) menggunakan PIM dengan senyawa tunggal aliquat 336, TOPO, dan campuran aliquat 336-TOPO, menentukan pengaruh komposisi senyawa pembawa, pengaruh konsentrasi fasa umpan, waktu pengadukan, dan frekuensi pemakaian membran terhadap transpor ion logam krom (VI). Efisiensi pemisahan diketahui dengan menentukan pengaruh komposisi senyawa pembawa, menentukan kadar ion krom (VI) dengan variasi konsentrasi fasa umpan, ketebalan membran, dan banyaknya pemakaian membran menggunakan AAS (Atomic Absorption Spectrometry). Morfologi permukaan membran dapat diketahui dengan menggunakan SEM (Scanning Electron Microscopy). Pada proses transpor, fasa umpan adalah limbah elektroplating yang mengandung logam krom dengan pH 4,4 sedangkan fasa penerima adalah larutan NaCl 2 N dengan pH 6,3. Analisis gugus fungsi komponen penyusun membran dilakukan dengan spektroskopi FTIR. Hasil penelitian menunjukkan bahwa transpor ion logam krom (VI) dipengaruhi oleh senyawa pembawa aliquat 336 dan campuran aliquat 336-TOPO. Keduanya lebih mempengaruhi transpor dibandingkan TOPO saja. Konsentrasi fasa umpan dengan konsentrasi awal 8,5 ppm, waktu pengadukan selama 72 jam, serta pemakaian pertama menghasilkan transpor ion logam terbanyak. Transpor terbanyak yaitu 97,8 % dari fasa umpan dan 76,5 % yang tertranspor ke fasa penerima.

Pemblokiran Gugus Amino dalam L-Sistein dan L-Valin Melalui Pembentukan Formamida Wibawa, Pratama Jujur; Ismiyarto, Ismiyarto
Jurnal Kimia Sains dan Aplikasi Vol 5, No 2 (2002): Volume 5 Issue 2 Year 2002
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Dalam penelitian ini telah dilakukan reaksi pemblokiran gugus amina pada L-valin dan pada L-sistein menggunakan asam format untuk membentuk, secara berurutan, formamida L-valin dan formamida L-sistein. Kedua formamida asam amino ini akan digunakan lebih lanjut untuk mensintesis asam 6-aminopenisilinat (6-APA), suatu zat antara kunci untuk membuat antibiotic baru turunan Î²-laktam. Reaksi dilaksanakan dengan alat refluks pada suhu sekitar 50-60Â°C selama 60-90 menit. Pada akhir reaksi dilakukan pemisahan pelarut menggunakan penguap berputar Buchii dan dilakukan pemurnian dengan metoda rekristalisasi menggunakan etanol. KristaI hasil pemblokiran gugus amina pada L-valin mempunyai titik leleh 153-154Â°C, sedangkan hasil pemblokiran gugus amina pada L-sistein titik lelehnya 129-131Â°C. Kedua kristal ini masing-masing memberikan noda tunggal pada plat KLT silika gel 60F154. Hasil analisis spektra IR dari masing-masing kristal ini menunjukkan bahwa reaksi pemblokiran berhasil dilakukan dan senyawa yang terbentuk merupakan formamida L-valin dan formamida L-sistein

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

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.

Cytotoxic, Antiproliferation, and Necrosis Effects of the n-Hexane Fraction Extract of Gendola Leaf (Basella rubra Linn.) Sri Hartini Harianja; Salni Salni; Subandrate Subandrate
Jurnal Kimia Sains dan Aplikasi Vol 23, No 1 (2020): Volume 23 Issue 1 Year 2020
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Breast cancer is the second most common cancer in women. Several studies have been conducted on natural materials to see the ability of its activity as a new anticancer compound. The purpose of this study was to determine the cytotoxic activity of Gendola leaf (Basella rubra Linn.) extracts and fractions, in inhibiting proliferation and inducing apoptosis of T47D breast cancer cells. The design of this study was experimental laboratory research using the in-vitro method. Cytotoxic and anti-proliferation tests on T47D cancer were using the MTT method, and the apoptosis test was using the flow cytometry method. Cytotoxic of extracts and fractions of n-hexane Gendola leaves were tested with a concentration series of 1000; 500; 250; 125; 62.5 μg/mL and doxorubicin was studied a series concentration of 0.5; 0.25; 0.125; 0.0625; 0.03125 μg/mL for 24 hours. Antiproliferation test used n-hexane fraction with a concentration series of 1IC50, ½IC50, ¼IC50, and ⅛IC50 with an incubation time of 24 and 48 hours. Apoptosis test utilized n-hexane fraction with a concentration series of 1IC50, ½IC50 with an incubation time of 24 hours. The results showed that the ethanol extract had IC50 424 μg/mL, n-hexane fraction 292 μg/mL. The n-hexane fraction had an anti-proliferation effect at a concentration of 1IC50 within 32 hours but was unable to induce T47D cell apoptosis. These results indicate that the n-hexane fraction of Gendola leaf has a cytotoxic effect, which can inhibit proliferation, that is unable to induce apoptosis but induce necrosis of T47D breast cancer cells.

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Adi Darmawan

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Kota semarang,

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