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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 11 Documents
 1   2 
Search results for , issue "Vol 2, No 2 (2009)" : 11 Documents clear
AKTIVITAS PENANGKAL RADIKAL BEBAS DAN PENSTABIL OKSIGEN SINGLET DARI EKSTRAK DAUN KUNYIT (Curcuma Domestica Val.) Suryanto, Edi
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4966

Abstract

The objectives of study was to determine free radical scavenging and singlet oxygen quenching (SOQ)activity in turmeric leaves extract. Analyses of phytochemicals were based on total phenolic, flavonoid andcondensed tannins. The radical scavenging activities of extracts were determined by 1.1-diphenyl-2-picrylhydrazyl (DPPH) assay. Turmeric leaves powder was extracted with methanol 80%, ethanol 80% danacetone 80% at room temperature for 24 hours, respectively. Singlet oxygen quenching (SOQ) activity ofeach tumiric leaves extracts at 500-1500 ppm level. SOQ activity test was conducted using linoleic acid assubstrates each containing 5 ppm erythrosine as a photosensitizer. The highest total phenolic flavonoidcontent was detected in methanol extract, followed by acetone extract and ethanol extract. Contrary,ethanol extract contained higher contents of condensed tannins than methanol extract and aceton extract.The addition of metanol extracts of turmeric leave in the reaction mixture showed the highest scavengingactivity in DPPH free radical followed by acetone extract and ethanol extract. The singlet oxygenquenching activities of turmeric extracts were greatly different in different solvents. The methanol extractexhibited the highest singlet oxygen quenching activities followed by acetone extract and ethanol extractunder fluorescent light for up to 5 hours. These result suggested that phenolic extract of turmeric leaveshad free radical scavenging and singlet oxygen quenching activities Keywords : turmeric leaves, phenolic extract, free radical scavenging, singlet oxygenquenching
CHARACTERIZING OF HYPOPHARYNGEAL ENZYMES IN THE DIGESTIC SYSTEM OF HONEY BEES USING GEL ELECTROPHORESIS TECHNIQUES Pontoh, Julius
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4971

Abstract

Keberadaan enzim pencernaan dalam lebah madu memainkan peran yang penting dalam kehidupanlebah. Enzim glukosidase dalam lebah madu diproduksi dalam kelenjar hipofaring dan disekresikan masukke dalam system pencernaan. Ketersediaan berbagai teknik elektroporetik membuka ruang lebih besaruntuk mengisolasi dan karakterisasi enzim ini sebagai cara baru untuk memahami fungsinya. Tiga sepsislebah madu yaitu Apis mellifera, A. cerana dan A. dorsata. SDS PAGE digunakan untuk verifikasiefesiensi setiap proses pemurnian protein menjadi protein murni. Kombinasi proses electrophoreticstaining and deglycosilation karbohidrat digunakan untuk mengetahui sifat enzim ini. Dua α-glucosidases(1 dan 2) telah dimurnikan menggunakan berbagai tenik kromatografi, tetapi β-glucosidase hanya dapatdimurnikan setelah menggunakan Native PAGE. Massa molekul relatif (Mr’s) enzim (α-glucosidase-1, α-glucosidase-2 dan β-glucosidase) dari A. mellifera adalah 90, 78 dan 72 kDa. Sedangkan enzim yangberasal dari A. cerana adalah 90, 77, dan 82 kDa. Titik isoelektrik (pI) enzim tersebut dari A. melliferaadalah 7.3, 7.5, dan 4.7, sedangkan dalam A. cerana 5.7, 6.2, dan 4.5. Berdasarkan Native IEF-PAGE,α-glucosidase-1 mengandung pita yang lebar, α-glucosidase-2 mengandung hanya pita yang sempit, danβ-glucosidase mengandung beberapa pita. Kombinasi Native PAGE dan IEF PAGE menunjukkan nodaglikoprotein yang menunjukkan bahwa α-glucosidase-1 adalah sebuah glikoprotein dengan berbagaiheterogenitas mikro Keywords : Apis mellifera, A. cerana dan A. dorsata. SDS PAGE, enzim glukosidase
STUDI TENTANG PEMBUATAN 1-(3,4-METILENDIOKSIFENIL)- 2-PROPILALKOHOL Fatimah, Feti
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4967

Abstract

A study has been carried out to synthesis of 1-(3,4-methylenediooxyphenil)-2-propylalcohol from safrole. Thesynthesize was done using react the oxymercuration-demercuration by means of mercury of acetate andsodium of boronhydride, while identifying conducted with the liquid gas chromatography and spectrometer.The experimental result show that the percentage yield of 1-(3,4-methylenedioxyphenil)-2-propylalcohol was77,78%. Keywords: 1-(3,4-methylenedioxyphenil)-2-propylalcohol
EIKODEKANA DARI DAUN TUMBUHAN GEDI (ABELMOSCHUS MANIHOT L. MEDIK) ASAL SULAWESI UTARA Mamahit, Lexie
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4972

Abstract

This research was aimed to isolate and identify the structure of secondary metabolities from gedileaf. In order to achieve this research aim, an extraction of the gedi leaf tissue with mwthanol solvent hadbeen carried out. These extract then was partitioned in several organic solvents such as n-hexane,chloroform, and ethyl acetate. Further, the resulted partition was fractionation and purifying undergoes anappropriate method like liquid and vacuum pressure chromatography. To determine the chemical structureof the isolate, a complication of several spectroscopic methods, such as infrared (IR), 1H and 13 C nuclearmagnetic resonance (NMR), and an advanced NMR techniques (HMQC, HMBC, and COSY). Results ofthis research shown that one major constituent was isolated from the leaf of gedi: eikodekana Keywords : eikodekana, Abelmoschus manihot
ADSORPTION ISOTHERM OF ETHANOL AND WATER IN GAS PHASE ON ZEOLITE A Wuntu, Audi
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4963

Abstract

Isoterm adsorpsi air dan etanol fase gas pada zeolit A yang disintesis dari silika gel dan aluminiumhidroksida serta diaktivasi pada 373 K dan 573 K telah dikaji. Eksperimen dilakukan menggunakanmetode gravimetri pada kondisi statis dan data yang diperoleh dianalisis menggunakan model isotermadsorpsi Dubinin-Raduskevich untuk memperoleh nilai kapasitas adsorpsi dan energi adsorpsi. Hasil yangdiperoleh menunjukkan bahwa kapasitas adsorpsi zeolit untuk air lebih besar dibandingkan untuk etanolkarena molekul air berukuran lebih kecil dan lebih polar. Suhu aktivasi zeolit yang tinggi mengakibatkanenergi adsorpsi zeolit untuk air dan etanol menjadi lebih kecil Keywords : adsorpsi, isotherm, zeolit
PERBANDINGAN KUALITAS KARBON AKTIF YANG DIBUAT DARI BATOK KELAPA HIBRIDA DAN BATOK KELAPA DALAM Tangkuman, Herling
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4969

Abstract

The objective of this research was to study active carbon quality from hybrid and deep coconut shell. Theparameter to analyze quality of active carbon were water content, ash content, volatile content, bondingcarbon content, Iodine value, and % tetrachloride. The results show that active carbon from deep coconutshell has the best quality in (CTC 54%, Iodine value 904, good granule and low solidity) Keywords : Quality, active carbon, hybrid coconut, deep coconut
EFEK PENSTABIL OKSIGEN SINGLET EKSTRAK PEWARNA DARI DAUN BAYAM TERHADAP FOTOOKSIDASI ASAM LINOLEAT, PROTEIN DAN VITAMIN C Katja, Dewa
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4965

Abstract

The objective of this research was to determine singlet oxygen quenching (SOQ) effects of colorantextracts of spinach leave on erythrosine-sensitized photooxidation of linoleic acid, protein and vitamine C.Spinach leave was extracted with water, ethanol 40%, 60% and 80% for 30 minutes. Analyses ofantioxidant phytochemicals were based on total phenolic and flavonoid contents. The extracts of spinachleaf evaluated singlet oxygen quenching effect using linoleic acid, protein and vitamine C as substrates eachcontaining 5 ppm erythrosine was exposed under fluorescent light (4000 lux). Extraction with ethanol 40%showed the highest yield of extract, followed with ethanol 60%, water and ethanol 80%. The result showedthat solvent was significantly have an effect on total phenolic content, which ethanol 60% extract was thehighest, followed with 80 and 40% ethanol extracts and water extract. Contrary, ethanol 40%, extractpossessed highest total flavonoid content than water extract, ethanol 60% and ethanol 80% extract.Futhermore, the result determined SOQ, water extract possessed highest SOQ compared with ethanol40%, 60% and 80% in photooxidation of linoleic acid system. However, ethanol extract 40% and ethanolextract 60% showed that highest activity than ethanol extract 80% and water extract in photoxidation ofprotein system whereas in photooxidation of vitamin C system, ethanol extract 60% showed higest activitycompared with etnanol extract 80, ethanol extract 40% and water. It is concluded that colorant extract ofspinach leave showing singlet oxygen quenching effect was a component having phenolic group Keywords : color, phenolic extract, spinach leaves, singlet oxygen quenching
ANALISIS BEBERAPA PARAMETER KUALITAS MINYAK PADA KOPRA DAN BUNGKIL KELAPA Rorong, Johnly
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4970

Abstract

A research was done to analyses oil quality in copra and coconut waste using some methods such aswater content, % Residual Oil Content. Base on results, data was obtained: water content (coconut waste)was 1.610%, Flakes Flakes value 8.322 and Conditioner Flakes value 1.612. water content for copra was6.785%, coconut waste (D.B) was 11.123% with Cooker Flakes value 2.112. Analyses of % Oil Contentcopra (dry basis, oven) was 65.329%, % Oil Content of copra (dry basis, oven) was 70.083%. Resultshows that persentase Oil Content copra at wet basis already agree to standard that is 65-66%.Persentase (%) RO coconut waste at wet basis (oven) already agree to standard that is < 10.00 % Keywords : copra, coconut waste, residual oil content
SINTESIS DODEKIL KLORIDA DARI REAKSI KLORINASI DODEKANOL DENGAN POSFOR TRIKLORIDA Aritonang, Henry
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4968

Abstract

Synthesis of dodecyl chloride produced by chlorination reaction of dodecanol with phosphor trichloride was14,48 grams (70,81%). Product of dodecyl chloride was identified by IR spectrometry which shows strongabsorption at 1425-1415 cm-1indicating vibration of group C-Cl and this vibration was supported at 850-600 cm-1 Keywords : dodecyl chloride, chlorination, dodecanol, phosphor trichloride
ANALISIS KADAR TIMBAL DARAH DAN PENYAKIT HIPERTENSI PADA PETUGAS STASIUN PENGISIAN BAHAN BAKAR UMUM DI KOTA MANADO Kawatu, Paul
CHEMISTRY PROGRESS Vol 2, No 2 (2009)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.2.2.2009.4973

Abstract

The contamination of gasoline is getting higher along with the increasing number of cars up to this days.With the improvement of lead polutant (Pb) on the air, human being will get more risk of being exposed bythe danger of this substance. Various effect of lead exposure toward human health are hypertension andoccupational fatigue. The workers of SPBU is a high risk group that was exposed by lead, since they wereused to exposed with fume or gasoline and smoke of cars. This research was aimed to find out therelationship between blood lead level and the incident of hypertension toward workers of SPBU in Manadomunicipality.This was a cross sectional research with 96 respondents. The bivariat analysis showed thatblood lead level had positive and significant correlation and yet weak toward hypertension incident(p<0,05; rpbis=0,324; rpbis2=0,105). The multivariate analysis showed that the blood lead level was asignificant predictor (p<0,05) toward hypertension incident with effective contribution of 6,74%. Theresearch result showed that the blood lead level had significant relationship and predictor towardhypertension after the other predictors being controlled. Therefore, prevention effort on the impact of leadthrough continuous health examination and application of health principles and occupational safety for theSPBU workers is necessary Keywords : blood lead level, hypertension

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