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Molekul: Jurnal Ilmiah Kimia

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Published by Universitas Jenderal Soedirman

ISSN : 19079761 EISSN : 25030310 DOI : -

Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry

MOLEKUL is a peer-reviewed journal of chemistry published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Jenderal Soedirman University, Indonesia. Publishing frequency 2 issues per year, on May and November. This Journal encompasses all branches of chemistry and its sub-disciplines including Pharmaceutical, Biological activities of Synthetic Drugs, Environmental Chemistry, Biochemistry, Polymer Chemistry, Petroleum Chemistry, and Agricultural Chemistry.

Arjuna Subject : -

Articles 331 Documents

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KECEPATAN ADUK DAN WAKTU KONTAK OPTIMUM PEMBUATAN BIODIESEL DARI MINYAK JELANTAH Dwi Kartika; Eva Vaulina; Senny Widyaningsih; Moch. Chasani
Molekul Vol 5, No 1 (2010)
Publisher : Universitas Jenderal Soedirman

Synthesis of biodiesel from waste cooking oil using activated natural zeolite catalyst has been done. Activation of the natural zeolite was done by refluxing with HCl 6M for 30 min, calcining and oxydizing at 500°C for 2 hours, consecutively. The variation of stirring speed were 350, 700, 1100 and 1200 rpm. The variation of reaction time were varied from 15, 30, 45, 60, and 120 min. The conversion of biodiesel was determined by 1H NMR spectrometer. The results showed that the optimum condition of biodiesel synthesis using esterification process were reached at 700 rpm and 15 minutes, which gave biodiesel conversion of 100%.

PENGGUNAAN LUMPUR AKTIF SEBAGAI MATERIAL UNTUK BIOSORPSI PEWARNA REMAZOL Dewi Yuanita; Endang Widjajanti; Sulistyani Sulistyani
Molekul Vol 9, No 2 (2014)
Publisher : Universitas Jenderal Soedirman

Penelitian ini bertujuan untuk mengetahui massa biosorben optimum, waktu kontak optimum dan konsentrasi pewarna optimum dalam biosorpsi lumpur aktif terhadap pewarna remazol teknis serta mengetahui pengaruh proses biosorpsi terhadap kadar COD (Chemical Oxygen Demand) pewarna remazol teknis. Proses biosorpsi dilakukan dengan sistem batch pada berbagai variasi massa biosorben, waktu kontak dan konsentrasi pewarna remazol teknis. Larutan pewarna remazol teknis sebelum dan sesudah biosorpsi dianalisis secara kuantitatif dengan spektrofotometer UV-Vis. Penentuan kadar COD dilakukan pada larutan remazol teknis sebelum dan sesudah adsorpsi. Efisiensi biosorpsi dinyatakan dalam bentuk konsentrasi teradsorpsi dibagi konsentrasi mula-mula larutan dan dikalikan 100%. Hasil penelitian menunjukkan bahwa: massa lumpur aktif yang memberikan efisiensi terbesar pada biosorpsi remazol blue yaitu 5 gram dengan efisiensi biosorpsi 6,83% sedangkan untuk remazol red adalah 150 gram dengan efisiensi biosorpsi 67,19%. Waktu optimum dalam biosorpsi remazol blue menggunakan lumpur aktif adalah 15 menit dengan efisiensi biosorpsi 7,98%, sedangkan untuk remazol red adalah 75 menit dengan efisiensi biosorpsi 9,30%. Konsentrasi optimum dalam biosorpsi remazol blue menggunakan lumpur aktif adalah 200 ppm dengan efisiensi biosorpsi 6,19% dan untuk remazol red 600 ppm dengan efisiensi biosorpsi 9,10%. Kadar COD pewarna remazol blue mengalami penurunan sebesar 22,22% setelah proses biosorpsi dengan lumpur aktif.

Backmatter (Instruction for author and back cover) Amin Fatoni
Molekul Vol 14, No 2 (2019)
Publisher : Universitas Jenderal Soedirman

No Abstract

Sesquiterpenoid Compounds from The Stembark of Aglaia minahassae (Meliaceae) Nunung Kurniasih; Hersa Milawati; Mohamad Fajar; Ace Tatang Hidayat; Rizky Abdulah; Desi Harneti; Unang Supratman; Mohamad Nurul Azmi
Molekul Vol 13, No 1 (2018)
Publisher : Universitas Jenderal Soedirman

Two sesquiterpenoid compounds, 4(15)-eudesmen-1b,6a-diol (1) and spathulenol (2) have been isolated from the stembark of Aglaia minahassae belong to Meliaceae family. The chemical structures of 1 and 2 were identified on the basis of spectroscopic evidence including UV, IR, NMR 1D, NMR 2D as well as mass spectra and by comparison with those previously reported spectra data. This compounds were isolated from this plant for the first time.

SUBKLONING DAN ISOLASI GEN PENYANDI MIKRONEMA 3 (MIC-3) Toxoplasma gondii ISOLAT LOKAL Diana Indrasanti; Aris Haryanto; Wayan T. Artama
Molekul Vol 6, No 1 (2011)
Publisher : Universitas Jenderal Soedirman

Microneme protein (MIC) is one of proteins that belongs to excretory-secretory antigens (ESAs) of Toxoplasma gondii. Microneme 3 protein (MIC-3) is the protein that plays an important role in the invasion proccess during cell infection as a mediator attachment parasite to the host cell. The aim of this research is to clone mic3 (gene encoding for MIC-3) of T. gondii from local isolate using recombinant DNA technology by cloning mic3 in an expression vector. Deoxyribonucleic acid (DNA) from T. gondii tachyzoites was amplified by PuRe Taq RTG-PCR Beads using mic3 specific primers. Amplified DNA was double digested using EcoRV and HindIII restriction endonucleases and then purified using EZ-10 spin coloumn purification kit. The mic3 DNA was ligated into pET-32a(+) expression vector and transformated into Escherichia coli BL21. The results showed that recombinant mic3gene 4.2 kDa has been successfully performed by cloning gene encoding for MIC-3 protein of T. gondii local isolate into pET-32a(+) and transformed to E. coli BL21.

STUDI TEORITIS STRUKTUR DAN SPEKTRUM ELEKTRONIK KOMPLEKS [Ln(pytpy)(NO3)3] SECARA KOMPUTASI METODE SPARKLE/RM1 Ely Setiawan; Agustino Zulys
Molekul Vol 10, No 1 (2015)
Publisher : Universitas Jenderal Soedirman

Telah dilakukan penelitian tentang studi teoritis struktur dan spektrum elektronik kompleks [Ln(pytpy)(NO3)3] (Ln=Eu, Tb, pytpy=4’-(2-pyrrolyl)-2,2’:6’,2”-terpyridine) menggunakan metode komputasi semiempiris Sparkle/RM1. Metode Sparkle/RM1 ini dapat digunakan untuk memperoleh struktur geometri paling stabil dan parameter struktur dalam keadaan gas sebagai simulasi metode eksperimen yang mungkin terlalu mahal. Perhitungan spektrum elektronik dilakukan dengan ZINDO/S, dengan mengganti sparkle dengan titik muatan +3 pada koordinat yang dihasilkan melalui Sparkle/RM1. Hasil penelitian menunjukkan bahwa ion lantanida pada kompleks [Ln(pytpy)(NO3)3] memiliki bilangan koordinasi 9, yang berikatan dengan satu ligan tridentat pytpy dan tiga gugus nitrat sebagai ligan bidentat. Panjang ikatan rata-rata ion lantanida dengan atom N pada ligan pytpy adalah 2,541 Å dan 5,14 Å untuk Eu3+ dan Tb3+. Studi teoritis spektroskopi menunjukkan bahwa metode Sparkle/RM1 cukup akurat dalam memprediksi spektrum IR ligan pytpy, kompleks [Eu(pytpy)(NO3)3] maupun [Tb(pytpy)(NO3)3]. Spektrum UV-Vis kompleks [Eu(pytpy)(NO3)3] dan [Tb(pytpy)(NO3)3] memiliki intensitas serapan yang lebih kuat dan absorbansi yang lebih besar dari spektrum UV-Vis ligan pytpy.

Anatomical and Molecular Responses of Soy Bean (Glycine Max (L.) Merr.) Due to Salinity Stresses Juwarno Juwarno; Siti Samiyarsih
Molekul Vol 12, No 1 (2017)
Publisher : Universitas Jenderal Soedirman

Current study was aimed to explore both anatomical and molecular responses of 3 soy bean cultivars (Mahameru, Slamet and Detam) which was given salinity stress. Data of the Mahameru cultivar showed that the widestÂ stomataÂ on upper epiderm 11.38 Âµm, the thickest upper epiderm was 10.71Âµm, butÂ the thickest of lower epiderm was only 9.98 Âµm, the highest density of stomata on lower epiderm was 13.66 per mm2 leaf area, and the thickest mesophyll was 110.37 Âµm. Molecular marker applying OPA-2 primer with RAPD technique showed the Detam and Slamet cultivars were having different bands one to each other even with the Mahameru cultivar. While the application of OPA-4 primer with the same technique showed there were no genetically different on Mahameru cultivar between control and Â treatment 80 mM NaCl. The OPA-8 primer showed that the control block of Slamet cultivar Â was different from either control block of others as well as treatment block of 80 mM NaCl. The use of OPA-18 primer showed that the Slamet cultivar of the control block Â and so its 80 mM NaCl block was different from Detam and Mahameru, where the 500th base of Slamet cultivar did not have DNA band.

PEMANFAATAN KARBON SABUT KELAPA TERIMPREGNASI UNTUK MENGURANGI TEMBAGA(II) DALAM MEDIUM AIR Roy Andreas; Uyi Sulaeman; Tien Setyaningtyas
Molekul Vol 3, No 2 (2008)
Publisher : Universitas Jenderal Soedirman

This research is conducted to produce carbons from coconut fibre which approach to activated carbon clause continue with carbon surface modification and the adsorption examination to Cu(II) ions. The research consist of several phase. Carbon making of coconut fibre conducted by carbonization processes at 320-400oC with temperature interval 20oC. Carbon yielded in characterized moisture content, ash content and its adsoprtion to iodium. The carbon surface modification conducted by loaded 2-mercaptobenzotiazol (MBT) on carbon. The adsorpsibility of carbon-MBT tested by influence of contact time, pH, and the isoterm adsorption pattern. The result of the study showed carbonization of coconut fibre which approach the requirement of SII No.0258-89 gained at temperature 320oC. In the present study equilibrium time of 10 minute and pH was found to be optimum for both adsorbent. While type of isothermal adsorption from carban and carbon-MBT adsorbent followed the Langmuir adsorption pattern.

Program Studi Kimia, MIPA, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Mochamad Chasani; Ruli Budi Fitriaji; Purwati Purwati
Molekul Vol 8, No 1 (2013)
Publisher : Universitas Jenderal Soedirman

Ketapang (Terminalia catappa Linn.) merupakan salah satu tumbuhan anggota famili Combretaceae. Hasil uji senyawa metabolit sekunder pada kulit batang ketapang diketahui mengandung flavonoid, terpenoid, polifenol, steroid dan saponin. Penelitian ini dilakukan untuk menemukan fraksi ekstrak dari kulit batang ketapang yang memiliki toksisitas tertinggi terhadap larva udang Artemia salina Leach dengan menggunakan metode BSLT serta mengidentifikasi senyawa metabolit sekundernya.Kulit batang ketapang diekstraksi secara maserasi menggunakan pelarut metanol. Ekstrak metanol yang diperoleh diekstraksi cair-cair dengan pelarut n-heksana, dan etil asetat. Ekstrak metanol (EM), fraksi n-heksana ekstrak metanol (FH), fraksi etil asetat ekstrak metanol (FE), dan residu etil asetat ekstrak metanol (FR) diuji toksisitasnya. Fraksi ekstrak dengan toksisitas tertinggi diuji kandungan senyawa metabolit sekundernya menggunakan pereaksi warna pada plat KLT.Hasil uji menunjukkan bahwa EM, FH, FE, dan FR bersifat toksik terhadap larva udang Artemia salina Leach dan FE bersifat paling toksik dengan nilai LC50 sebesar 61,675 ppm. Hasil uji metabolit sekunder menunjukkan FE mengandung senyawa golongan flavonoid, fenolat, terpenoid, dan saponin.

Colorimetric Detection of Hg(II) Ion Using Silver Nanoparticles Capped with 3-Hydroxybenzoic Acid Gusrizal Gusrizal; Andi Hairil Alimuddin; Ajuk Sapar; Rizki Noviani Ridwan; Sri Juari Santosa
Molekul Vol 14, No 1 (2019)
Publisher : Universitas Jenderal Soedirman

In this paper, we report for the first time thesimple method for detection of Hg(II) ion in anaqueousmedium using silver nanoparticles capped with 3-hydroxybenzoic acid. Silver nanoparticles capped with 3-hydroxybenzoic acid were preparedby reduction of the silver ion with 3-hydroxybenzoic acid and without surface functionalization. The formation of silver nanoparticles was characterized by a UV-Visible spectrophotometer. The yellowcolloid of prepared silver nanoparticles capped with 3-hydroxybenzoic acid showed a surface plasmon resonance peak at 420 nm. The ability of silver nanoparticles capped with 3-hydroxybenzoic acid in detection was tested by doing a reaction with several metal ions individually(Na(I), K(I), Cu(II), Zn(II), Ca(II), Mg(II), Hg(II), Mn(II), Ni(II), Pb(II), and Co(II)). It was foundthat silver nanoparticles capped with 3-hydroxybenzoic acid highly selective toHg(II) and then the prepared silver nanoparticles were developedfor detection of Hg(II) ion. Addition of 1 mL Hg(II) ion into 4mL the as-preparedsilver nanoparticles reducedthe peak of surface plasmon resonance spectra, andthe reduction of peak intensity was proportional to the concentration of Hg(II) ion. A goodlinear relationship (R2= 0.998) between absorbance at 420 nm and concentrationof Hg(II) over the range 1.0x10-3to 5.5x10-3M was obtained. Silver nanoparticles capped with 3-hydroxybenzoic acid were highly sensitive to Hg (II) ion with the detection limit down to 4.7x10-5M. Application the method to the real water sample showed the excellentresult with recovery ranged from 98 to 101%. The proposed method was found to be useful forthe colorimetric detection of Hg(II) ion in an aqueousmedium.

Page 12 of 34 | Total Record : 331

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Amin Fatoni

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Contact Name Amin Fatoni

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Editorial Address Jl. Dr. Soeparno No.61 Karangwangkal, Purwokerto, Jawa Tengah 53

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Abstract

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Contact Name
Amin Fatoni

Contact Email
aminfatoni@unsoed.ac.id

Phone
-

Journal Mail Official
j.molekul@gmail.com

Editorial Address
Jl. Dr. Soeparno No.61 Karangwangkal, Purwokerto, Jawa Tengah 53

Location
Kab. banyumas,

Jawa tengah

INDONESIA