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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 KANDUNGAN KLOROFIL PADA BERBAGAI POSISI DAUN DAN ANAK DAUN AREN (Arrenga pinnata) Lawendatu, Olivia P. G.; Pontoh, Julius; Kamu, Vanda
CHEMISTRY PROGRESS Vol 12, No 2 (2019)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.12.2.2019.27925

Abstract

ABSTRAKTelah dilakukan penelitian tentang analisis kandungan klorofil dari berbagai posisi daun dan anak daun dari tanaman aren. Daun aren diambil pada posisi atas, tengah, dan bawah dari tajuk tanaman. Sampel anak daun  dibagi 3 posisi yaitu atas, tengah, dan bawah. Ekstraksi dilakukan dengan methanol dan penetuan klorofil pada daun dilakukan dengan spektofotometer pada panjang gelombang 665 nm dan 652 nm untuk masing-masing klorofil a dan klorofil b. Kandungan klorofil a dan b  yang terdapat pada sampel daun aren yang dihitung berdasarkan 3 unit satuan µg/mL, mg/g  dan µmol/m2. Kandungan klorofil a dan b pada sampel pohon aren tertinggi terletak pada posisi kiri daun, pada posisi daun terletak pada daun atas, pada posisi anak daun terletak pada posisi ujung anak daun. Ratio kandungan klorofil pada sampel daun aren berkisar 1,30-6,72. ABSTRACTHas conducted research on the analysis of chlorophyll content from various positions of leaves and leaves of palm plants. Leaves are taken in the top, middle and bottom positions of the plant canopy. Samples of leaflets were divided into 3 positions namely top, middle and bottom. Extraction was carried out with methanol and the determination of chlorophyll in the leaves was carried out by spectrophotometer at wavelengths of 665 nm and 652 nm for chlorophyll a and chlorophyll b, respectively. The chlorophyll and b content in palm leaf samples are calculated based on 3 units of μg/mL, mg/g, and µmol/m2. The content of chlorophyll a and b in the highest palm tree sample is located in the left position of the leaf, the position of the leaf is placed on the top of the leaf, the position of the leaflets is placed in the tip of the leaflets. The ratio of chlorophyll content in sugar palm leaf samples in the setting is 1.30-6.72. 
Degradasi metilen blue menggunakan fotokatalis ZnO-zeolit Putri Dini, Eka Wahyu
CHEMISTRY PROGRESS Vol 7, No 1 (2014)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.7.1.2014.4852

Abstract

Penelitian degradasi zat warna metilen biru menggunakan fotokatalis ZnO-zeolit dibawah sinar UV telah dilakukan. Penelitian ini menggunakan variasi konsentrasi metilen biru sebanyak 10, 20, 30, 40 dan 50 mg/L, variasi pH yaitu 3, 5, 7, 9 dan 11 dengan waktu kontak yaitu 10, 20, 30, 40, dan 50 menit. Tujuan variasi konsentrasi yaitu untuk mengetahui kemampuan degradasi dan tujuan variasi pH yaitu untuk mengetahui aktivitas fotokatalis. Prosentase degradasi metilen biru diukur menggunakan instrumen spektronik 20. Hasil penelitian menunjukkan bahwa penurunan konsentrasi optimum metilen biru adalah 20 mg/L dengan pH optimum pada pH 9 dan waktu kontak optimum pada 50 menit. Variasi konsentrasi menunjukkan bahwa semakin besar konsentrasi metilen biru yang digunakan maka kemampuan degradasi metilen biru semakin menurun. Sedangkan pada pH basa, kemampuan aktivitas fotokatalis semakin meningkat. Pada waktu kontak optimum menunjukkan metilen biru yang terdegradasi semakin banyak.   Keywords : fotokatalis ZnO-zeolit, fotodegradasi, metilen biru
ANTIBACTERIAL ACTIVITY OF PROPOLIS Trigona spp. FROM BUKITTINGGI WEST SUMATERA AGAINST Salmonella sp. Hasan, Zaenal
CHEMISTRY PROGRESS Vol 4, No 2 (2011)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.4.2.2011.4974

Abstract

Propolis is a resinous hive product consists of exudates from plants mixed with beeswax and used by bees asglue. The objective of this study was to investigate the antibacterial activity of ethanol extract of Trigona spp.propolis collected from Bukittinggi West Sumatera on Salmonella sp. using agar well diffusion method. Thecompound group of the propolis was also investigated on the existence of alkaloids, flavonoids, saphonins,tannins, steroids, and terpenoids. Ethanol extract of Trigona spp. propolis showed antibacterial activity onSalmonella sp. with minimum inhibitory concentration of 0,87% (w/w). The compound groups detected inethanol extract Trigona spp. propolis were flavonoids and tannins, which suggests that the antibacterial activityof Trigona spp. propolis may be due to these compounds. Keywords: propolis, Trigona spp., Salmonella sp., antibacterial
KUALITAS VIRGIN COCONUT OIL DARI BEBERAPA METODE PEMBUATAN Pontoh, Julius; Surbakti, Mariana Br.; Papilaya, Mayz
CHEMISTRY PROGRESS Vol 1, No 1 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.1.2008.28

Abstract

A research had been conducted to study the quality of Virgin Coconut Oils (VCOs) by various processing methods including step-wise heating, oil addition, and fermentation. Various parameters were measured to study the quality of VCOs from three processing methods including oil content, water content, free fatty acids content and peroxide value. The collected data was analyzed statistically following the analysis of variance (ANOVA) followed by the Least Significant Difference (LSD)Test. The results showed that the highest oil content was found from the VCO processed by oil addition method but did not significantly different with that processed by step-wise heating and fermentation methods. The highest water content was found from VCO processed by step wise heating, but not significantly different with that processed by fermentation. The lowest free fatty acid content was found from VCO processed by stepwise heating, and significantly different with that from VCO processed by fermentation, but not significantl different with that from VCO processed by oil addition. The lowest peroxide value was found from VCO processed by fermentation, but not different to that from VCO processed by both stepwise heating and oil addition. Stepwise heating produced VCO with very hight quality followed by VCO processed by oil addition. Fermentation method produced VCO with very low quality.
PRAKONSENTRASI ION Cu(II) MENGGUNAKAN RESIN BERBASIS MIKROKAPSUL Ca-ALGINAT SECARA OFF-LINE DENGAN METODE KOLOM Panggabean, Aman S.; Pasaribu, Subur P.; Sari, Ika Y. L.
CHEMISTRY PROGRESS Vol 5, No 2 (2012)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.5.2.2012.769

Abstract

Penelitian tentang pengembangan teknik prakonsentrasi ion logam Cu(II) dengan menggunakan kolom yang berisi resin Ca-Alginat telah dilakukan. Teknik prakonsentrasi ini dilakukan secara off-line, yaitu sampel air dimasukkan ke dalam kolom, dielusi dengan HCl 1,5 M, kemudian eluatnya ditampung dan diukur dengan spektrofotometer serapan atom. Beberapa parameter penting pada teknik prakonsentrasi ini telah dipelajari. Dari hasil penelitian diperoleh kondisi optimum untuk retensi ion Cu(II) yaitu pada pH 4, volume sampel 4 mL, volume eluen HCl 2 mL dengan konsentrasi 1,5 M, dan kapasitas retensi 3,8269 mg Cu/g resin. Kinerja analitik metode ini sangat baik untuk analisis ion Cu(II) ditunjukkan dari pengukuran nilai batas deteksi sebesar 3,73 μg/L dengan tingkat kebolehulangan yang dinyatakan sebagai nilai persentase koefisien variansi sebesar 1,2669 %. Metode ini dapat diaplikasikan untuk analisis ion Cu(II) pada sampel air dari lingkungan dengan nilai perolehan kembali > 95 %, dengan menggunakan teknik spike terlihat bahwa matriks sampel yang berasal dari Sungai Mahakam dan Sungai Karang Mumus tidak mempengaruhi hasil pengukuran.Research about developing preconcentration technique of Cu(II) ion by using column technique filled with Ca-Alginate resin has been carried out. The preconcentration technique was developed by off-line method, water samples were passed through the column and eluted with 1.5 M HCl. The eluate was taken and detected by atomic absorption spectrophotometer. The important parameters for preconcentration technique had been studied. The optimum conditions obtained for the retention of Cu(II) ion was at pH 4, sample volume of 4 mL, the eluate volume of 2 mL with concentration of 1.5 M HCl, and retention capacity of 3.8269 mg Cu/g resin. The analytical performance of this method is good which are shown by the limit of detection of 3.73 μg/L and the reproducibility level shown by the precentage of the coefficient variance of 1.2636 %. The method could be applied for the determination of Cu(II) ion in the water samples from environment with a recovery percentage of > 95% by using the spike method it was shown that matrice of water from Mahakam and Karang Mumus Rivers did not effect the results of measurement.
UJI EFEKTIFITAS ANTIDIABETES EKSTRAK ETANOL KULIT BUAH MANGGIS (Garcinia mangostana L) PADA TIKUS PUTIH (Rattus norvegicus) YANG DIINDUKSI ALOKSAN Maliangkay, Hendra P.; Rumondor, Rolef; Walean, Mario
CHEMISTRY PROGRESS Vol 11, No 1 (2018)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.11.1.2018.27909

Abstract

ABSTRAK Tujuan dari penelitian ini untuk mengetahui efek antidiabetes ekstrak kulit buah manggis pada tikus putih jantan galur wistar (Rattusnorvegicus) yang diinduksi aloksan yang diberikan secara intreperitoneal dan membandingkan efektivitasnya dengan glibenklamid. Penelitian ini menggunakan 5 kelompok perlakuan yaitu pemberian aquadest sebagai kontrol normal, pemberian aloksan sebagai kontrol negatif, pemberian aloksan dan glibenklamid sebagai kontrol positif dan ekstrak etanol kulit buah manggis dengan dosis 150 mg/kg BB dan 300 mg/kg BB. Pengukuran glukosa darah dilakukan pada hari ke-0 (tiga hari sesudah di induksi), hari ke-7 dan hari ke-14. Hasil penelitian menunjukkan bahwa pemberian ekstrak etanol kulit buah manggis (Gracinia mangostana) dapat menurunkan kadar glukosa darah. Dosis 150 mg/kg BB memiliki presentase penurunan kadar glukosa darah pada hari ke 7 dan hari ke 14 masing-masing sebesar 64,68% dan 81,46%. Dosis 300 mg/kg BB memiliki presentase penurunan kadar glukosa darah pada hari ke 7 dan hari ke 14 masing-masing sebesar 35.77% dan 76.75%. Dosis 150 mg/kg BB lebih efektif sebagai antidiabetes dibandingkan dengan dosis 300 mg/Kg BB. Pemberian ekstrak etanol kulit buah manggis (Gracinia mangostana) juga memiliki aktivitas untuk memperbaiki kerusakan sel-sel β-pankreas pada tikus putih (Rattus norvegicus) yang diinduksi aloksan. ABSTRACT The purpose of this study to determine the anti-diabetic effect of mangosteen rind extract of galur wistar male rats (Rattus norvegicus)  induced alloxan given intraperitoneally and comparing its effectiveness with glibenclamide. This study uses 5 groups namely giving aquadest as normal control, giving alloxan as a negative control, giving alloxan and glibenclamide as a positive control and the ethanol extract of mangosteen rind with a dose of 150 mg/kg BB and 300 mg/kg BB. Blood glucose measurement performed on day 0 ( three days after induction ), day 7, and day 14. The results showed that ethanol extract of mangosteen (Garcinia mangostana L) rind can lower blood glucose levekls. A dose of 150 mg/kg BB have percentage decrease in blood glucose levels on day 7 and day 14 respectively by 64.68% and 81.46%. dose of 300 mg/kg BB have a percentage decrease in blood glucose levels on day 7 and day 14 respectively by 35.77% and 76.75%. a dose of 150 mg/kg BB is more effective as an anti-diabetic compared with a dose of 300 mg/kg BB. Ethanol extract mangosteen (Garcinia mangostana L) rind also has an activity to repair damaged pancreatic-β cells in rats (Rattus norvegicus) induced by alloxan. 
AKTIVITAS ANTIOKSIDAN DARI SANTAN KELAPA DI SULAWESI UTARA Muchsin, Reyhan; Fatimah, Feti; Rorong, Johnly A.
CHEMISTRY PROGRESS Vol 9, No 2 (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.9.2.2016.27985

Abstract

Telah dilakukan penelitian untuk menentukan aktivitas antioksidan dari santan kelapa di Sulawesi Utara. Santan kelapa dibuat dengan cara kelapa dikupas, dibuang kulit coklat yang menempel pada daging kelapa, selanjutnya daging kelapa diparut, diperas, dan disaring. Penentuan kandungan total fenol menggunakan metode Folin-Ciocalteu dan aktivitas antioksidan menggunakan metode serapan radikal 1,1-difenil-2-pikrilhidrazil (DPPH). Hasil Pengujian menunjukkan kandungan total fenol tertinggi terdapat pada SKG sebesar 34,80 mg/Kg diikuti SKH dan SKD dengan nilai 30,03 mg/Kg dan 26,16 mg/Kg. Aktivitas penangkal radikal bebas paling tinggi terdapat pada SKG dengan nilai presentase sebesar 73,48% diikuti SKD dan SKH dengan nilai 58,17% dan 37,88%. Hasil ini menunjukkan bahwa santan kelapa yang ada di Sulawesi Utara berpotensi sebagai antioksidan alami. ABSTRACTA research had been conducted to determine the antioxidant activity of coconut milk in North Sulawesi. Coconut milk is made by coconut peeled, discarded brown skin on the meat of coconut, further shredded coconut meat, squeezed and filtered. The determination of phenolic content was using Folin-Ciocalteu method and the antioxidant activity was done using diphenylpycrylhydrazil (DPPH) radical scavenging. The result showed phenol content was found highest in SKG amounted to 34.80 mg/kg followed by SKH and SKD with a value of 30.03 mg/kg and 26.16 mg/Kg. Highest free-radical scavengers activities found in SKG with a percentage of 73.48% value SKD and SKH followed with a value of 58.17% and 37.88%. These results indicate that the coconut milk in North Sulawesi has potential as natural antioxidants.  
SINTESIS METIL ESTER ASAM LEMAK DARI MINYAK KELAPA HASIL PEMANASAN Rorong, Johnly; Aritonang, Henry F.; Ranti, Ferdinan P.
CHEMISTRY PROGRESS Vol 1, No 1 (2008)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.1.1.2008.20

Abstract

A research has been done to synthesis mixed fatty acid esther from coconut oil, before and after heating with variation time 1, 2 and 3 hours at ±175-180 ºC. The synthesis was done with transestherification method using acid as a cathalyst at 65 °C. The transestherification result was analyzed using gas chromatography to obtain its fatty acid composition. The mass of FAME obtained from methyl esther synthesized from coconut oil with heating time 0, 1, 2 and 3 hours are; 94.73 g, 93.57 g, 95.76 g dan 93.88 g respectively.
PENGGUNAAN METODE SEMIEMPIRIK PM3 UNTUK EVALUASI INTERAKSI ALLOPURINOL–ASAM METAKRILAT UNTUK SINTESIS POLIMER TERCETAK MOLEKUL Tahir, Iqmal; Ahmad, Mohd Noor; Arbain, Dahyar
CHEMISTRY PROGRESS Vol 5, No 1 (2012)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.5.1.2012.648

Abstract

Tahir dkk., 2012. Penggunaan Metode Semiempirik PM3 Untuk Evaluasi Interaksi Allopurinol–Asam MetakrilatUntuk Sintesis Polimer Tercetak Molekul. Polimer tercetak molekul untuk aplikasi sensor allopurinol berbasis Quartz Crystal Microbalance dapatdirancang dengan pemodelan molekul menggunakan metoda mekanika kuantum-semiempirik PM3. Kajianditentukan berdasarkan interaksi molekular antara allopurinol sebagai templat dan asam metakrilat sebagaimonomer fungsional, sehingga diperoleh rasio mol antara allopurinol dan asam metakrilat secara teoritik.Pemodelan molekul dilakukan dengan pendekatan perhitungan mekanika kuantum semi empirik PM3 padaperangkat lunak Hyperchem 8.0. Hasil penelitian menunjukkan interaksi yang terbentuk melibatkan interaksinon kovalen terutama ikatan hidrogen. Kestabilan struktur pre kompleks dari allopurinol – asam metakrilatpaling tinggi pada rasio mol 1:3 yang digunakan sebagai rekomendasi rasio mol untuk sintesis polimer tercetakallopurinol.Kata kunci : allopurinol, asam metakrilat, semiempirik PM3, polimer tercetak molekul, Quartz Crystal MicrobalanceTahir et al., 2012. Use of PM3 Semiempirical Method to Evaluate of Allopurinol-Methacrylic Acids Interactionfor Synthesis of Molecular Imprinted Polymer. Molecular imprinted polymer of allopurinol for sensing application based on Quartz Crystal Microbalance can bedesigned using molecular modeling applying quantum mechanics-PM3 semiempirical calculation. The study isperformed theoretically by evaluating of the molecular interaction between allopurinol as templat molecule andmethacrylic acids as functional monomer molecules. All of the calculation is run on PM3 semiempirical levelusing HyperChem Software. The result showed that the existences of interaction are formed by non covalentbinding especially hydrogen bonding. Structure stability of pre complex between allopurinol-methacrylic acid isrelatively optimum at ratio 1:3 and it can be used as the experimental mole ratio to synthesize of allopurinolimprinted polimer.Keywords : allopurinol, methacrylic acid, semiempirical PM3, molecular imprinted polymer, QuartzCrystal Microbalance
ANALISIS IN-SILICO PROTEIN TIOL-DISULFIDA ISOMERASE FAMILI Bacillus Kumaunang, Maureen
CHEMISTRY PROGRESS Vol 3, No 2 (2010)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.3.2.2010.18982

Abstract

ABSTRACTKumaunang et al., 2010. Characterization of transcript genome product from Chaperone Bacillus sp. RP1.Protein folding is facilitated by chaperone molecule an folding catalyst.The aim of this research was to characterize the gene product of thiol-disulfide oxidoreductase gene from thermophylic organism Bacillus sp. Method used in this research were isolation and purification of deducted gene and characterization of gene product. The result showed that isolated gene has 1.4 kbp in length. Characterization of gene product indicated three proteins, Bdbdred, Bdbdox, and Etda, that have thioredoxin and DsbA motifs, and also active site and bonding site with Zn. Structure prediction of these three proteins showed similarity among them.Keywords : chaperone, thiol-disulfide oxidoreductase, thioredoxin, DsbA, Bdbd

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