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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 5 Documents
 1 
Search results for , issue "Vol 9, No 1 (2016)" : 5 Documents clear
PENGARUH LIMBAH CAIR INDUSTRI TAHU TERHADAP KUALITAS AIR SUNGAI PAAL 4 KECAMATAN TIKALA KOTA MANADO ,, Sepriani; Abidjulu,, Jemmy; Kolengan, Harry S. J.
CHEMISTRY PROGRESS Vol 9, No 1 (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.9.1.2016.13910

Abstract

A research had been conducted to determine the pollutan level of Paal 4 river water in Tikala Manado, as a results of tofu liquid waste discharging. The measured parameters are pH, nitrite (NO2-), nitrate (NO3-), ammonium, total dissolved solids (TDS ), total suspended solids (TSS), dissolved oxygen (DO), chemical oxygen demand (COD) and biochemical oxygen demand (BOD). The results showed that almost all of measured parameters, that is pH (4.95), nitrate (232.6082 mg/L), ammonium (0.6533 mg/L), TDS (3510 mg/L), DO (0.83 mg/L), BOD (370 mg/L) and COD (420 mg/L), exceed the requirement set by government in PP No. 82 thn 2001. This indicates that the river water is in a highly polluted condition.Telah dilakukan penelitian untuk menentukan tingkat pencemaran air sungai Paal 4 di Tikala Manado hasil pembuangan limbah cair tahu. Parameter yang diukur adalah pH, nitrit (NO2-), nitrat (NO3-), amonium, total padatan terlarut (TDS), total padatan tersuspensi (TSS), oksigen terlarut (DO), kebutuhan oksigen kimiawi (COD) dan kebutuhan oksigen biokimiawi (BOD). Hasil penelitian menunjukan hampir semua parameter yang diukur yaitu pH (4.95), Nitrat (232.6082 mg/L), Amonium (0.6533 mg/L), TDS (3510 mg/L), DO (0.83 mg/L), BOD (370 mg/L) dan COD (420 mg/L) melebihi standar yang telah ditetapkan oleh pemerintah dalam PP No. 28 thn 2001. Hal ini mengindikasikan bahwa air sungai ini berada pada kondisi sangat tercemar.
AKTIVITAS ANTIOKSIDAN DARI FRAKSI TONGKOL JAGUNG (Zea mays L.) YANG DIINDUKSI OLEH Fe2+ DAN CAHAYA UV-B Mawardi, Rizky H.; Suryanto, Edi; Sudewi, Sri
CHEMISTRY PROGRESS Vol 9, No 1 (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.9.1.2016.13906

Abstract

This research aims to study the anti UV-B activity from solvent fractions of corncobs. The study initiating by extracting the powder corn cobs using way reflux for two hours with 80% ethanol. Extract then partitioned using a series of solvent; n-hexane, ethyl acetate, butanol and distilled water. Then was determined the effect of fractions against lipid oxidation induced by UV-B light. The results showed that the ethyl acetate fraction showed the lowest content of conjugated diene followed fraction of butanol, n-hexane and distilled water. The content of conjugated diene was 21.89; 25.11; 42.94; and 46.08 mmol/kg, respectively. Based on this study, the fraction of ethyl acetate fraction could act as an antioxidant and anti UV-B better than the other fractionsPenelitian ini bertujuan untuk mempelajari aktivitas anti UV-B dari fraksi pelarut tongkol jagung. Penelitian dimulai dengan mengekstraksi serbuk tongkol jagung menggunakan cara refluks selama dua jam dengan pelarut etanol 80%. Ekstrak kemudian dipartisi berturut-turut menggunakan pelarut n-heksan, etil asetat, butanol, dan aquades. Kemudian ditentukan pengaruh fraksi terhadap oksidasi lipid yang diinduksi dengan cahaya UV-B. Hasilnya menunjukkan bahwa fraksi etil asetat memiliki kandungan diena terkonjugasi terendahdiikuti fraksi butanol, n-heksan dan aquades. Kandungan diena terkonjugasi berturut-turut adalah 21,89; 25,11; 42,94; dan 46,08 mmol/kg. Berdasarkan penelitian ini, dapat disimpulkan bahwa fraksi etil asetat dapat berperan sebagai antioksidan dan anti UV-B lebih baik dibandingkan dengan fraksi lainnya.
PENGARUH LAMA PERENDAMAN TERHADAP AKTIVITAS ANTIOKSIDAN DARI EMPELUR SAGU BARUK (Arenga microcharpha) Momuat, Lidya Irma; Suryanto, Edi
CHEMISTRY PROGRESS Vol 9, No 1 (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.9.1.2016.13909

Abstract

Sago baruk is one of endemic crop type of Archipelago of Sangihe Talaud, North Sulawesi. The objectives of this research were to study immersion time effect on antioxidant activity of sago baruk pith extract. The fresh sago baruk trunks pith was extracted with destilate water and stored at room temperature for 1, 2 and 3 days. After that, the filtrate was evaporated with heating technique. The pith extract was analysed phenolic total content by spectrophotometer. Antioxidant activity of each pith extract are evaluated in 1.1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging (DPPH method), total antioxidant (FRAP method), antioxidant capacity (Phophomolybdate method) and reducing power (potassium ferricyanide method). The result of analysis in phenolic content showed that pith extract at immersion time of first day higher compared with second and third days. The result is in line with free radical scavenging measuring with immersion time of first day higher than second and third days. Likewise, the total antioxidant, antioxidant capacity and reducing power also showed that pith extract in immersion time of first day has highest antioxidant capacity than second and third days. There is effect that immersion time of sago baruk pith influence on phenolic content and antioxidant activity. This result concluded that sago baruk pith extract having phenolic compound and antioxidant activities. There is effect that immersion time of sago baruk pith influence on phenolic content and antioxidant activity. This result concluded that sago baruk pith extract having phenolic compound and antioxidant activities.
BIOSINTESIS NANOPARTIKEL PERAK MENGGUNAKAN EKSTRAK EMPELUR BATANG SAGU BARUK (ARENGA MICROCARPHA) DAN AKTIVITAS ANTIOKSIDANNYA Tapa, Fitriyanti La; Suryanto, Edi; Momuat, Lidya Irma
CHEMISTRY PROGRESS Vol 9, No 1 (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.9.1.2016.13907

Abstract

Objectives of this research to synthesize silver nanoparticles with extract pith of sago baruk (Arenga microcarpha) by using temperature variations and study the antioxidant activity of silver nanoparticles. Synthesis of silver nanoparticles using green methods "green chemistry" by reacting extract sago empelur baruk and silver nitrate (AgNO3) 10-3. Characterization using UV-Vis and Transmission Electron Microscopy (TEM). Analysis of the UV-Vis spectrum showed that the nanoparticles were relatively stable at wavelength 426.50 to 452.00 nm. The results of characterization TEM shows silver nanoparticles were synthesized by using extract pith of sago baruk at 60 0C with silver nitrate (AgNO3) 10-3 has the smallest size of 10.59 nm and 50.07 nm greatest reach. Silver nanoparticles from the pith of sago baruk extract had higher antioxidant activity (59.61%), compared to extract stem pith of sago baruk without silver nanoparticles (21.15%).Tujuan dari penelitian ini untuk mensintesis nanopartikel perak dengan ekstrak empelur sagu baruk menggunakan variasi suhu dan untuk mempelajari aktivitas antioksidan dari nanopartikel perak. Nanopartikel perak disintesis menggunakan metode hijau ?green chemistry? dengan mereaksikan ekstrak empelur sagu baruk dengan perak nitrat (AgNO3) 10-3. Karakterisasi menggunakan spektrofotometer UV-Vis dan Transmission Electron Microscope (TEM). Analisis terhadap stpektra UV-Vis menunjukan bahwa nanopartikel relatif stabil pada panjang gelombang 426,50-452,00 nm.Hasil dari karakterisasi TEM menunjukan nanopartikel perak yang disintesis menggunakan ekstrak empelur sagu baruk pada suhu 60 0C dengan perak nitrat (AgNO3) 10-3 memiliki ukuran terkecil 10,59 nm dan yang terbesar mencapai 50,07 nm. Nanopartikel perak dari ekstrak empelur sagu baruk memiliki aktivitas antioksidan lebih tinggi (54,42%), dibandingkan dengan ekstrak batang empelur sagu baruk tanpa nanopartikel perak (21,92%).
AKTIVITAS ANTIOKSIDAN EKSTRAK DAN FRAKSI DARI BIJI JAGUNG (Zea mays L.) Sembiring, Elia; Sangi, Meiske S.; Suryanto, Edi
CHEMISTRY PROGRESS Vol 9, No 1 (2016)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.9.1.2016.13908

Abstract

The purpose of this research was to determined antioxidant activity of extract and various fractions of corn kernels. Extract and fractions of corn kernels were evaluated for total phenolic content, antioxidant capacity with phosphomolybdate and free-radical scavengers activity with DPPH (1,1-diphenyl-2-picryl hydrazyl) method. The result of this study shows that the ethyl acetate fraction had the highest total phenolic content of 49.59 mg/kg, followed by aquadest fraction, n-hexane fraction, and butanol fraction. The total antioxidant activity indicates that the greater the concentration of corn kernels’ fraction, it also increases the antioxidant activity and the n-hexane fraction has the highest total carotenoid of 1.433 mg/g, followed by the fractions of ethyl acetate, ethanol, butanol, and water. The total carotenoid content indicates that carotenoid compound have an important role as an antioxidantPenelitian ini bertujuan untuk menentukan aktivitas antioksidan ekstrak dan berbagai fraksi dari biji jagung. Ekstrak dan fraksi biji jagung dievaluasi untuk kandungan total fenolik, total karotenoid, kapasitas antioksidan dengan metode fosfomolibdat dan aktivitas penangkal radikal bebas dengan metode DPPH (1,1-diphenyl-2-picryl hydrazyl). Hasil penelitian menunjukkan fraksi etil asetat biji jagung memiliki kandungan total fenolik paling tinggi yaitu 49,59 mg/kg diikuti dengan fraksi air, fraksi n-heksana dan fraksi butanol.Total aktivitas antioksidan menunjukkan bahwa semakin besar konsentrasi fraksi biji jagung maka semakin meningkat juga aktivitas antioksidan dan fraksi n-heksana memiliki kandungan total karotenoid yang tinggi yaitu 1,433 mg/g diikuti dengan fraksi etil asetat, ekstrak etanol, fraksi butanol dan fraksi air.

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