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INDONESIA
CHEMISTRY PROGRESS
Published by Universitas Sam Ratulangi
ISSN : 19795920     EISSN : 27158365     DOI : -
Core Subject : Science,
Chemistry
Majalah Ilmiah Chemistry Progress merupakan media untuk menyebarkan informasi ilmiah dan sarana komunikasi bagi para ilmuan dan cendekiawan melalui tulisan-tulisan ilmiah. Majalah Ilmiah Chemistry Progress terbit dua nomor dalam satu tahun (Mei dan November) berisi kajian penelitian dalam lingkup ilmu kimia (organik, anorganik, analitik, biokimia, fisika, bahan alam, lingkungan, pangan, kelautan, pertambangan, farmasi dan komputasi). Jumlah halaman pervolume adalah 55-65 halaman.
Arjuna Subject : -
Articles 275 Documents
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ANALISIS ASAM BENZOAT DENGAN PERBEDAAN PREPARASI PADA KULIT DAN DAUN KAYU MANIS (Cinnamomun burmanni) Rorong, Johnly Alfreds
CHEMISTRY PROGRESS Vol 6, No 2 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.6.2.2013.3499

Abstract

Telah dilakukan analisis senyawa benzoat dalam tanaman kayu manis (Cinnamomun burmanni). Penelitian ini dilakukan, meliputi : persiapan sampel, ekstraksi pelarut, analisis secara kualitatif dan kuantitatif. Analisis kualitatif dengan reagen FeCl3 dan secara kuantitatif yaitu penentuan konsentrasi asam benzoat, secara spektrofotometri UV-Vis, pada panjang gelombang 272 nm dengan pelarut dietil eter (DE). Senyawa benzoat merupakan gabungan asam benzoat dan eugenol. Parameter penelitian adalah asam benzoat dalam kulit (K) dan daun (D) tanaman kayu manis, dengan metode perbedaan pengeringan sampel. Pengeringan dengan sinar matahari dan tanpa sinar matahari. Hasil analisis kualitatif dinyatakan positif dengan terbentuknya endapan cincin berwarna merah kecoklatan, hal itu menunjukkan keberadaan asam benzoat dalam sampel sedangkan analisis kuantitatif diperoleh konsentrasi asam benzoat dalam keempat sampel (K1;K2;D1dan D2), secara berturut-turut: 36.852; 32.763; 45.809 dan 44.571 mg/L.Analyzes have been carried of the benzoat compounds in the Cinnamomun burmanni plants. The step researches: sampling, solvents extraction, qualitative and quantitative analysis. Qualitative analysis with using FeCl3 reagent and quantitative was determined benzoat consentration according ultra violet spectrophotometric methods at 272 nm wavelength and diethyl eter solvent. The benzoat compounds was benzoic acid and eugenol combine. The parameter of researches was benzoic acid in the leaves and skin of the Cinnamomun burmanni plants using compare drying methods. Drying methods with sunray and without sunray. The research indicated that: qualitative analysis of positive results in the samples with to form solid of rings red browning color and quantitative analysis of benzoic acid consentration in the leaves and skin of the Cinnamomun burmanni plants (S1;S2;L1 and L2) : 36.852; 32.763; 45.809 dan 44.571 mg/L.
DEGRADASI DAN ADSORBSI ZAT WARNA METHYLENE BLUE MENGGUNAKAN KOMPOSIT Ag-TULANG IKAN TERKALSINASI Kakame, Dewi Y. N.; Wuntu, Audy D.; Koleangan, Harry
CHEMISTRY PROGRESS Vol 11, No 2 (2018)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.11.2.2018.27940

Abstract

ABSTRAKPembuangan limbah berwarna ke lingkungan merupakan sumber pencemaran dan dapat menimbulkan bahaya seperti efek toksik.Untuk masalah limbah zat warna tersebut,metode fotodegradasi dan adsorpsi merupakan metode yang efektif karena diketahui dapat menguraikan senyawa zat warna menjadi senyawa yang tidak berbahaya. Tujuan penelitian ini untuk mengetahui kemampuan dari komposit Ag-tulang ikan terkalsinasi (Ag-TIK) dalam mendegradasi dan mengadsorpsi zat warna methylene blue. Penghilangan zat warna methylene blue dari larutan dengan pelarut air menggunakan komposit Ag-TIK dengan perbandingan Ag:Hidroksiapatit (HAp) 5:1 dan   3:3 berturut-turut mencapai 77% dan 75% dibawah radiasi sinar UV. pada penggunaan komposit Ag-TIK  3:3 tidak terjadi proses degradasi tetapi terjadi proses adsorpsi.Penggunaan cahaya lampu floresens dan tanpa cahaya memberikan hasil berturut-turut 69% dan 68% adsorpsi zat warna methylene blue. Eksperimen pengaruh lama penyinaran pada kemampuan komposit Ag-TIK untuk menghilangkan methylene blue menunjukan bahwa proses degradasi dan adsorpsi zat methylene blue terjadi sangat cepat dan kesetimbangan tercapai dalam waktu kurang dari 2 menit. ABSTRACTDisposal of colored waste into the environment is a source of pollution and can cause hazards such as toxic effects. For the problem of dye waste, the photodegradation and adsorption method is an effective method because it is known to be able to decompose dyestuff compounds into non-hazardous compounds. The purpose of this study was to determine the ability of calcined fish bone (Ag-CFB) composites to degrade and adsorb methylene blue dyestuff. The removal of dyestuff methylene blue from the solution with water solvent using Ag- CFB composite with a ratio of Ag: Hydroxyapatite (HAp) 5:1 and 3:3 respectively reached 77% and 75% under UV radiation. In the use of 3: 3 Ag-CFB composites there is no degradation process but the adsorption process occurs. The use of fluorescent and non-light lamps provides 69% and 68% adsorption of methylene blue dyes, respectively. Experiments on the effect of irradiation on Ag-CFB composite ability to remove methylene blue indicate that the degradation and adsorption process of methylene blue occurs very quickly and equilibrium is achieved in less than 2 minutes.
PERBANDINGAN SENYAWA FENOLIK DAN AKTIVITAS ANTIOKSIDAN ANTARA SAGU BARUK SEGAR DAN KERING Momuat, Lidya Irma; Suryanto, Edi; Rantung, Olha; Korua, Aneke; Datu, Hasan
CHEMISTRY PROGRESS Vol 8, No 1 (2015)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.8.1.2015.9399

Abstract

Sago Baruk (Arenga microcarpha) is one of endemic crop type of Archipelago of Sangihe Talaud, North Sulawesi and potential as source of alternative food. The objectives of this research were to determine the phenolics composition and antioxidant activity of fresh and dry sago baruk trunks pith sago which was extracted by sequentially with aquades and filtrate. Flour sago baruk extract were analysed phenolic total, flavonoid and tannin condensed content by spectrophotometer. Antioxidant activity of each sago flour are evaluated in 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging, total antioxidant and reducing power. Result of analysis in phenolic dan flavonoid total content indicate that dry sago baruk higher compared fresh sago flour of baruk wet while tannin condensed content do not show difference. Result of examination of antioxidant activity indicated that fresh sago baruk having higher DPPH free radical scavenging activity compared to dry sago baruk (the average values of 83,08% and 81,49%, respectively). In contrast, total antioxidant and reducing power of dry sago baruk presented higher antioxidant activity compared to fresh sago baruk with average value (the average values of 109,48 and 92,52 μmole/100 g, respectively). Futhermore, correlations analysis revealed that total phenolic, flavonoid, tannin content with DPPH and FRAP scavenging activities were well positively correlated with each other (R= 0.7526; 0,7467 and 0,8146, respectively). Result of this research concluded that dry and fresh sago baruk trunks pith having phenolic compound and antioxidant activitiesSagu baruk (Arenga microcarpha) merupakan salah satu jenis tanaman endemik Kepulauan Sangihe Talaud, Sulawesi Utara yang potensial sebagai sumber pangan alternatif. Tujuan penelitian ini adalah untuk menentukan komposisi senyawa fenolik dan aktivitas antioksidan dari sagu baruk segar dan kering yang diekstraksi secara sekuensial dengan akuades dan filtrat. Empelur batang sagu segar dan kering diekstraksi secara sekuensial dengan akuades dan filtrat. Ekstrak tepung sagu baruk dianalisis kandung total fenolik, flavonoid dan tannin terkondensasi dengan spektrofotometer. Aktivitas antioksidan dievaluasi dengan penangkalan radikal bebas difenil pikrilhidrazil (DPPH), total antioksidan dan kemampuan mereduksi. Hasil analisis terhadap kandungan total fenolik dan flavonoid menunjukkan bahwa sagu baruk kering lebih tinggi dibandingkan dengan tepung sagu baruk basah sedangkan kandungan tannin terkondensasi tidak menunjukkan perbedaan. Hasil pengujian aktivitas antioksidan menunjukkan bahwa sagu baruk segar memiliki aktivitas penangkal radikal bebas DPPH lebih tinggi dibandingkan dengan sagu baruk kering (dengan persentase rata-rata berturut-turut adalah 83,08 dan 81,49%). Sebaliknya, total antioksidan dan kemampuan mereduksi sagu baruk kering memberikan aktivitas antioksidan tertinggi dibandingkan dengan sagu baruk segar (dengan rata-rata 109,48 dan 92,52 μmol/100 g). Selanjutnya, analisa korelasi mengungkapkan bahwa kandungan total fenolik, flavonoid, tannin dengan aktivitas penangkalan DPPH dan FRAP secara positif berhubungan dengan satu sama lainnya (R= 0.7526; 0,7467 dan 0,8146). Hasil penelitian ini menyimpulkan bahwa empelur sagu baruk kering dan segar memiliki senyawa fenolik dan aktivitas antioksidan.
ANALISIS FITOKIMIA ENCENG GONDOK (Eichhornia crassipes) DAN EFEKNYA SEBAGAI AGEN PHOTOREDUKSI Fe3+ Rorong, Johnly A.; Suryanto, Edi
CHEMISTRY PROGRESS Vol 3, No 1 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.1.2010.72

Abstract

Eichhornia crassipes is a weeds to people. The objectives of this research were to analyze phytochemicalcontent and photoreduction activity. Phytochemical content that analyzed were total phenolic, total flavonoidand condenced tannin. Photoreduction activity were done using reduction of Fe3+ to Fe2+. The highest totalphenolic, flavonoid and condenced tannin were extracted with water in leaves, 26.327, 3.191, 25.300 mg/kgrespectively. Photoreduction activity of enceng gondok decreases Fe3+ concentration from 9,111 to 1,500 ppm.Enceng gondok posses photoreduction activity because it has phenolic, flavonoid and condenced tannincontent.
ANALISIS FITOKIMIA DAN UJI TOKSISITAS DARI KULIT BATANG KERSEN (Muntingia calabura) Tulung, Prilly; Rorong, Jhonly; Pontoh, Julius
CHEMISTRY PROGRESS Vol 10, No 1 (2017)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.10.1.2017.27969

Abstract

ABSTRAK Kersen adalah tanaman yang memiliki potensi sebagai bahan obat. Tujuan dari penelitian ini untuk menganalisis kandungan fitokimia dan uji toksisitas pada ekstrak metanol kulit batang kersen. Fitokimia dianalisis sebagai total fenolik, total flavonoid dan tanin terkondensasi. Ekstraksi dilakukan dengan metode maserasi dengan metanol sebagai pelarut. Uji toksisitas dilakukan dengan menggunakan metode BSLT, larva udang dimasukkan ke dalam larutan uji dengan masing-masing konsentrasi larutan yang berbeda. Nilai LC50 diperoleh berdasarkan perhitungan persen kematian larva udang menggunakan analisis probit. Hasil LC50ekstrak metanol dari kulit batang kersen adalah 0,28 ppm. Nilai untuk total fenolik yaitu 44,914 mg. as.galat/kg sampel, total flavonoid 10,822 mg. kuersetin /kg sampel dan tanin terkondensasi 11,124 mg katekin/kg sampel.ABSTRACTKersen is a medical plant which have the potential as drug. The aims of this research were to analysis phytochemical content and to test the toxicity of methanol extract of bark from kersen. The Phytochemicals that analyzed were total phenolic, total flavonoid and condensed tannin. Toxicity test was assessed using BSLT method. Extraction was done by maseration method using methanol as the solvent. In BSLT method, the shrimp larvae were placed in a series of test solution of varied concentration. The value of LC50 were obtained based on calculation of shrimp larvae lethality percentage using probit analysis. LC50 values of methanol extract were 0.28 ppm. The results showed that total phenolic was 44.914 mg. gallic acid/kg sample, total flavonoid was 10.822 mg quercetin/kg sample and condenced tannin was 11.124 mg. catechin/kg sample.
SINTESIS NANOPARTIKEL COBALT FERRITE (CoFe2O4) DENGAN METODE KOPRESIPITASI DAN APLIKASINYA SEBAGAI FOTOKATALIS Suaib, Suaib; Aritonang, Henry; Koleangan, Harry S. J.
CHEMISTRY PROGRESS Vol 12, No 1 (2019)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.12.1.2019.27922

Abstract

ABSTRAKTelah dilakukan penelitian tentang kemampuan fotokatalis nanopartikel CoFe2O4 dalam mendegradasi zat warna sintetik Methylene Blue (MB) menggunakan metode kopresipitasi. Nanopartikel tersebut dikarakterisasi menggunakan X-Ray Diffractometry (XRD), Scanning Electron Microscope (SEM) dan spektroskopi UV-vis. Kemampuan fotokatalis dilakukan melalui penentuan konsentrasi Methylene Blue yang tersisa setelah waktu kontak nanopartikel CoFe2O4 dengan larutan Methylene Blue 5 ppm yang disinari sinar UV-A selama 30, 45, 60, 90 dan 120 menit.  Penentuan konsentrasi dihitung berdasarkan absorbansi yang didapatkan dari hasil pembacaan uji Spektrofotometri UV-vis lalu digunakan rumus menghitung % degradasi. Hasil penelitian menunjukkan bahwa kemampuan fotokatalis paling baik adalah nanopartikel CoFe2O4 dengan nilai % degradasi untuk variasi waktu penyinaran 60 menit adalah sebesar 40,72 %. ABSTRACTA research on the ability of CoFe2O4 nanoparticles degradation of as photocatalyst to dyemethylene Blue(MB) synthetic using coprecipitation method. The nanoparticles were characterized using X-ray diffractometry (XRD), Scanning Electron Microscope (SEM) and UV-Vis spectroscopy. The ability of the photocatalyst is done by determining the concentration of Methylene Blue residu after contact time of CoFe2O4 nanoparticleswith a solution of Methylene Blue 5 ppm irradiated UV-A for 30, 45, 60, 90 and 120 minutes. Determining the concentration is calculated based on the absorbance obtained from the results of analysis UV-vis spectrophotometry and then used a formula calculating the% degradation. The results showed that ability is the best photocatalyst CoFe2O4 nanoparticles with the value of% degradation for variations in exposure time of 60 minutes is equal to 40.72 %. 
ANALISIS KUALITAS AIR SUNGAI TANOYAN DI KOTA KOTAMOBAGU PROVINSI SULAWESI UTARA Abidjulu, Jemmy
CHEMISTRY PROGRESS Vol 1, No 2 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.2.2008.4960

Abstract

A research has been done about the quality of water from Tonayan river in Kotamobagu city Province ofNorth Sulawesi based on its physics and chemical parameter. The sample was taken on three spot withduplo methods. The first sample was undertaken on the upperstream at Tanoyan village, second wasundertaken on the downstream at Mopait village and the third was undertaken at Kopandakan village.Analysis of water using Turbiditimetry, pH-metri, EDTA, and Spectrophotometer methods. The resultthat had been obtained was compared with the standart of pure water class II based on the governmentrules No.82 year 2001. Based on the research result, the quality of river water at the three spot are: notaste, no flavor, turbidymetry ( 3,1-9 NTU), pH (6,5-7,9), saturated (440-560 mg/1), chloride (0,02-21,02mg/L), ferrum (<0,01-0,036 mg/L), mangannese (0,02-0,071 mg/L), nitrat (<0,5 mg/L), seng (0,02-0,215mg/L), cyanide (0,11-0,01 mg/L), dan sulphat (2-71 mg/L). This research conclude that water inTonayan river Kotamobagu city Province of North Sulawesi for all parameters are in standart quality,accept saturated at first spot and zinc at the third spot Keywords: Quality, water, river, physics parameter, chemical parameter
EFEKTIVITAS ARANG AKTIF KULIT SALAK PADA PEMURNIAN MINYAK GORENG BEKAS Mangallo, Bertha; ., Susilowati; Wati, Siti Irma
CHEMISTRY PROGRESS Vol 7, No 2 (2014)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.7.2.2014.7468

Abstract

This research aims to determine the effectiveness of activated charcoal the bark leather as an adsorbent inpurifying used cooking oil. The research methods include the manufacture of activated charcoal from leatherbark, analysis of quality activated charcoal bark leather, refining of used cooking oil, quality analysis of cooking oilresults of purification. In this study observed several variables that will affect the adsorption process is the weightratio of activated charcoal with used cooking oil, the effect of temperature and time adsorption used cooking oilwith the adsorbent bark leather. Bark leather adsorbent surface characteristics were analyzed with SEM. Theresults of the analysis of activated charcoal bark leather is yield 66.35%, 10% moisture content and ash contentof 20%. The purification process used cooking oil by activated charcoal bark leather is affected by temperatureand contact time adsorbent with the cooking oil. The higher temperature adsorption, cooking oil quality obtainedthe better, which is characterized by a decrease in water content, free fatty acid value, peroxide number anddecrease in turbidity. Effectiveness purification of used cooking oil with activated charcoal adsorbent bark leather,is achieved at a temperature of 100 °C and a contact time of 80 minutes, with the quality is 0.15% water content,acid number 0.64%, and 5.06 NTU turbidity value.Penelitian ini bertujuan untuk mengetahui efektivitas arang aktif kulit salak sebagai adsorben pada pemurnianminyak goreng bekas. Metode penelitian ini meliputi pembuatan arang aktif dari kulit salak, analisis kualitasarang aktif kulit salak, pemurnian minyak goreng bekas, analisis kualitas minyak goreng hasil pemurnian. Dalampenelitian ini akan diamati beberapa variabel yang berpengaruh terhadap proses adsorpsi yaitu perbandinganberat arang aktif dengan minyak goreng bekas, pengaruh temperatur dan waktu adsorpsi minyak goreng bekasoleh adsorben kulit salak. Karakteristik permukaan adsorben kulit salak dianalisis dengan SEM. Hasil analisisterhadap arang aktif kulit salak menunjukkan rendamen 66,35%, kadar air 10% dan kadar abu 20%. Prosespemurnian minyak goreng bekas oleh arang aktif kulit salak dipengaruhi oleh temperatur dan waktu kontakminyak goreng dengan adsorben. Semakin tinggi temperatur adsorpsi, kualitas minyak goreng yang diperolehsemakin baik, yang ditandai oleh penurunan kadar air, penurunan bilangan asam lemak bebas, penurunanbilangan peroksida dan penurunan angka kekeruhan. Efektivitas pemurnian minyak goreng bekas dengan adsorben arang aktif kulit salak, tercapai pada temperatur 100 oC dan waktu kontak 80 menit, dengan kualitas minyak dengan kadar air 0,1528%, bilangan asam 0,64%, dan nilai kekeruhan 5,06 NTU.
ANALISIS IN-SILICO PROTEIN DnaJ Bacilus stearothermophilus Kumaunang, Maureen; Kamu, Vanda S.; Mandik, Yohanis I.
CHEMISTRY PROGRESS Vol 2, No 1 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.1.2009.63

Abstract

DnaJ is a chaperone which has function in facilitating folding, translocation, and degradation of protein.The aim of this research was to undertake in silico study of DnaJ protein from Bacillus stearothermophilus.Structure analysis of DnaJ B. stearothermophilus showed that it has J-domain which has two conservedmotifs, i.e. HPD and QKRA motifs. It also has cys-rich domain which has one conserved motif, i.e.CXXCXGXG. Structure prediction of DnaJ B. stearothermophilus showed that it has similar structure of Jdomainand cys-rich domain with that of DnaJ Escherichia coli.
SINTESIS DAN KARAKTERISASI NANOPARTIKEL PLATINA (Pt) DARI LARUTAN KALIUM TETRAKLOROPLATINAT(II) (K2PtCl4) Rachman, Himas A. A.; Aritonang, Henry; Koleangan, Harry
CHEMISTRY PROGRESS Vol 10, No 2 (2017)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.10.2.2017.27746

Abstract

ABSTRAK  Penelitian ini bertujuan untuk menentukan ukuran dan jumlah nanopartikel platina (Pt) dengan mensintesis nanopartikel Pt dari larutan prekursor kalium tetrakloroplatinat(II) (K2PtCl4) dengan menggunakan matriks nata de coco dan reduktor natrium borohidrida (NaBH4). Nanopartikel Pt diperoleh dari variasi konsentrasi 10 mM dan 20 mM. Hasil penelitian dianalisis dengan menggunakan Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) dan Transmission Electron Microscopy (TEM). Berdasarkan analisis TEM, nanopartikel Pt dari prekursor K2PtCl4 memiliki ukuran rata-rata 1 nm dan jumlah kandungan nanopartikel Pt untuk masing-masing konsentrasi prekursor yaitu sebesar 59,16% dan 35,04%. Kata kunci: Sintesis, nanopartikel Pt, K2PtCl4, nata de coco     ABSTRACT The main purpose of this research was to determine the size and the number of content of platinum (Pt) nanoparticles by synthesizing Pt nanoparticles from the precursor solution of potassium tetrachloroplatinate (II) (K2PtCl4) using nata de coco matrix and reductor of sodium borohydride (NaBH4). The Pt nanoparticles were obtained from the variations of precursor concentration 10 mM dan 20 mM. The results were analyzed using Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) and Transmission Electron Microscopy (TEM). Based on TEM analysis, Pt nanoparticles from K2PtCl4 precursor have average size of 1 nm and the number of Pt nanoparticles content for each precursor concentration were 59.16% and 35.04%, respectively. Keywords: Synthesis, Pt nanoparticles, K2PtCl4, nata de coco

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