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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 246 Documents
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CRYSTALLIZATION TEMPERATURE OF NaA ZEOLITE PREPARED FROM SILICA GEL AND ALUMINUM HYDROXIDE Wuntu, Audy; Kamu, Vanda; Kumanaung, Maureen
CHEMISTRY PROGRESS Vol 4, No 1 (2011)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.4.1.2011.26498

Abstract

ABSTRACTWuntu, A. D. et al. 2011. Suhu kristalisasi zaolit NaA yang disintesis dari silica gel dan aluminium hidroksida.Pengaruh suhu dalam tahap kristalisasi zeolit NaA telah dikaji dalam penelitian ini. Sintesis zeolit NaAdikerjakan pada kondisi hidrotermal konvensional menggunakan silika gel dan aluminium hidroksida sebagaibahan dasar dan kristalisasi dikondisikan pada suhu 60 oC, 75 oC, 90 oC, 105 oC, dan 120 oC. Kristalisasi zeolitNaA selanjutnya dianalisis dengan teknik spektroskopi infra merah. Hasil yang diperoleh memperlihatkanbahwa pada suhu 60 oC belum terbentuk kristal zeolit yang ditunjukkan dengan tidak adanya pita serapan yangmenjadi karakteristik zeolit A pada spektra infra merah. Pita serapan khas zeolit A muncul pada spektra inframerah zeolit yang diperlakukan pada suhu kristalisasi 75 oC hingga 120 oC.Kata kunci : kristalisasi, suhu, zeolite NaA, silika gel
KIMIA OKSIGEN SINGLET: SENSITISER, CAHAYA DAN REAKTIVITASNYA TERHADAP ASAM LEMAK TAK JENUH Suryanto, Edi
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.1.2.2008.4962

Abstract

Singlet oxygen chemistry and photooxidation reaction, in general, often require one or more criticalreaction steps that involve a sensitizer and light for photochemistry production of singlet oxygen from atriplet state. Singlet oxygen can be formed chemically, enzimatically, and photochemically. However, themost well documented formation mechanism for singlet oxygen is photochemistry using sensitizers.Chlorophyll, riboflavin, myoglobin, porphyrins, erythrosine, rose bengal, methylene blue, bilirubin andretinal are well-known photosensitizer and can absorb energy from light and transfer it to triplet oxygen toform singlet oxygen. Photooxidation provides an important way to produced hydroperoxides fromunsaturated fatty acids in presence of oxygen, light energy and photosensitizer. Hydroperoxide are themajor initiation products of lipid oxidation chain reactions. Singlet oxygen participated in the initiation stepof oil oxidation and the reaction rate of singlet oxygen with oleic, linoleic acid and linolenic are about30.000, 1450 and 900 times greater than that of triplet oxygen. Therefore, this review discusses twoimportant singlet oxygen mechanisms, the formation of singlet oxygen and double bond reaction inunsaturated fatty acid system Key word: Singlet oxygen, sensitizer, unsaturated fatty acids, hydroperoxides
KOMPOSISI KIMIA ASAM-ASAM LEMAK PADA DAGING IKAN TERI (Stophelorus sp.) Sari, Indah Permata; Pontoh, Julius; Sangi, Meiske S.
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.11.2.2018.27942

Abstract

ABSTRAKPenelitian ini bertujuan untuk menentukan komposisi kimia asam-asam lemak pada daging ikan teri (Stophelorus sp.) dengan menggunakan metode kromatografi gas. Penelitian ini dimulai dengan pengujian kadar air yang diperoleh sebesar 69,9% dan kadar lemak sebesar 5,09%. Ekstrak minyak ikan yang diperoleh di transesterifikasi basa menggunakan metode derivatisasi kemudian diinjeksikan pada alat kromatografi gas. Hasil penelitian menunjukkan bahwa minyak ikan teri memiliki asam lemak jenuh sebesar 45,83% dan asam lemak tak jenuh sebesar 54,18%. Hasil penelitian ini menyimpulkan bahwa daging ikan marlin biru mengandung asam miristat, palmitat, palmitoleat, stearat, oleat, linoleat, linolenat, EPA dan DHA. ABSTRACTThis study aims to determine the chemical composition of fatty acids in anchovy meat (Stophelorus sp.) using gas chromatography method. This is study began with testing the obtained water content of 69,9% and fatty content of 5,09%. The extract of fish oil obtained in base transesterifiction using derivatization method is then injected into gas chromatography device. The result showed that anchovy oil had saturated fatty acids of 45,83% and unsaturated fatty acids of 54,18%. The result of this study concluded that anchovy meat contained myristic, palmitic, palmitoleic, stearic, oleic, linoleic, EPA and DHA acids. Keywords: Anchovy, fatty acids, gas chromatography
PHYTOCHEMICAL ANALYSES AND FREE RADICAL SCAVENGING ACTIVITY FROM TUIS (Nicolaia speciosa, HORAN) Kojong, Novel; Monintja, John; Wehantouw, Frenly; Paendong, Edwin
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.3.1.2010.74

Abstract

Tuis (Nicolaia speciosa, Horan) is a plant which used by people to give taste and odor on food, and it also usedas herbal.The objective of this research was to determine phytochemical content and free radical scavengingactivity from Tuis. Phytochemical content in Tuis was determined by its alkaloid, steroid, flavonoid, phenolic,tannins and saponim content. Free radical scavenging activity from Tuis was determined using 1,1-difenil-2-pikrilhidrazil (DPPH) method.Tuis contain phytochemical such as alkaloids, terpenoid, saponim and tannins,although flavonoid appear only in leaves part. The highest free radical scavenging activity from Tuis was leavesextract, with IC50 1,77. Phenolic content in Tuis was believed act as antioxidant.
KARAKTERISASI DAN PENGUJIAN RESIN POLYALKYD ALAMI SEBAGAI ELASTOMER Wibowo, Heri Budi
CHEMISTRY PROGRESS Vol 6, No 1 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.6.1.2013.2063

Abstract

Penggunaan elastomer (karet sintetis) semakin besar dan selama ini digunakan bahan dasar elastomer yangberasal dari hasil minyak bumi seperti polibutadien, poliester dan polietilen.Adanya keterbatasan sumberminyak bumi di bidang industri elastomer perlu diatasi dengan penelitian bahan dasar alternatif yang dapatdiperbaharui untuk mendapatkan elastomer. Polialkyd merupakan polimer alami dari asam lemak yang sangatmemungkinkan diaplikasikan untuk resin elastomer. Salah satu penggunaan elastomer adalah sebagai bahanbakar dan resin untuk propelan, sebagaipengganti senyawa polibutadien. Elastomer juga dapat digunakansebagai binder propelan. Tujuan tulisan ini adalah melakukan studi penggunaan polialkyd dari asam lemaknabati untuk elastomer. Minyak yang digunakan dalam penelitian ini dipilih minyak kedelai, minyak biji rami,minyak kelapa, dan minyak kelapa sawit. Penelitian dilakukan dengan proses alkoholisis asam lemak padasuhu 200 – 300o C dan proses esterifikasi pada suhu 200 – 300 o C. Proses esterifikasi dihentikan denganpenambahan ptalat anhidrida, kemudian hasil resin polyalkyd yang diperoleh direaksikan dengan bahanretikulasi MAXPO untuk didapatkan elastomer. Variabel penelitian adalah komposisi. Analisis yang dilakukanadalah kuat tarik dan kekerasan. Hasil pengujian menunjukkan bahwa plyalkid dari minyak jenuh memberikanresin polyalkyd yang lebih bening, mudah kering, dan fleksibilitas tinggi. Polyalkyd dari minyak tidak jenuhmemberikan polyalkyd yang lebih keras.Most of elastomers (synthetic rubber) is produced from petroleum products such as polybutadiene, polyesterand polyethylene. Limited petroleum resources in future, it’s needs to find alternative renewable for elastomers.Polyalkyd is a natural polymer of fatty acids that is possible applied to elastomers resin that can substitute thepolybutadiene as propellant binder. Elastomer compounds can also be used as a binder propelan. The aim ofthis paper is to study the application of fatty acids of vegetable polialkyd to produce elastomer. The fatty acidssource are soybean oil, flax seed oil, coconut oil, and palm oil. Research carried out by the alcoholysis of fattyacid at temperature 200-300 °C and the esterification proccess at temperature of 200-300o C. Esterificationprocess was quenched by the addition of pthalat anhydride, then the results obtained polyalkyd resin reactedwith MAXPO reticulation materials for elastomers obtained. The research variables are the composition of rawmaterial. The analysis conducted is the tensile strength and hardness. The test results show that polyalkyd of oilsaturated resin polyalkyd provide a more transparent, easy to dry, and high flexibility. Polyalkyd of unsaturatedoils give harder polyalkyd.
SINTESIS DAN KARAKTERISASI NANOPARTIKEL CuFe2O4 SERTA APLIKASINYA SEBAGAI ANTIBAKTERI Lasera, Almendo G.; Aritonang, Henry; Koleangan, Harry
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.12.2.2019.27929

Abstract

ABSTRAKNanopartikel CuFe2O4 disintesis menggunakan metode kopresipitasi. Material yang telah disintesis, kemudian dikarakterisasi dengan menggunakan Scanning Electron Microscopy (SEM) dan Xray-Diffraction (XRD) serta di uji aktifitasnya sebagai antibakteri dengan menggunakan bakteri Staphylococcus aureus (Gram positif) dan Escherichia coli (Gram negatif). Hasil citra SEM memperlihatkan morfologi nanopartikel CuFe2O4 berbentuk persegi yang tidak beraturan. Difraktogram XRD menunjukkan bahwa ukuran sampel CuFe2O4 yang diperoleh adalah sebesar 20,136 nm. Uji aktifitas antibakteri yang telah dilakukan menunjukkan bahwa, nanopartikel CuFe2O4  jauh lebih baik dalam menghambat pertumbuhan bakteri E. coli dibandingkan dengan bakteri S.aureus, masing-masing 24 mm dan 6,5 mm. ABSTRACTCuFe2O4 nanoparticles were synthesized using the coprecipitation method. The synthesized material was then characterized using Scanning Electron Microscopy (SEM) and Xray-Difraction (XRD) and tested as antibacterial activity using Staphylococcus aureus (Gram positive) and Escherichia coli (Gram negative) bacteria. SEM imaging showed morphology of CuFe2O4 nanoparticles shaped like a rod. XRD diffractogram showed that the size of CuFe2O4 nanoparticles that obtained at 20.13 nm. The antibacterial activity test that has been done shows, CuFe2O4 nanoparticles are much better in inhibiting the growth of E. coli bacteria compared with S. aureus bacteria, 24 mm and 6,5 respertivelly. 
ADSORPSI ASETON, BENZENA, DAN TOLUENA PADA KARBON AKTIF TEMPURUNG KELAPA SEBAGAI PEMBERSIH UDARA RUANG TERTUTUP Wuntu, Audy
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.1.2.2008.4953

Abstract

Adsorption of air pollutant volatile organic compounds, those are acetone, benzene, and toluene onactivated carbon prepared from coconut shell had been studied. The research was aimed to explore theadsorption capacity and adsorption energy of the compounds on coconut shell activated carbon understatic condition. In this condition, the adsorbent was stayed for 24 hours inside a closed bin containingsingle gas: actone, benzene, or toluene. The result showed that the adsorption capacity of thesecompounds on activated carbon was in the order of acetone > benzene > toluene. The same order wasobserved for the parameter of adsorption energy of the compounds on activated carbon Keywords: adsorption, adsorbent, activated carbon, coconut shell
SINTESIS NANOPARTIKEL ZnO YANG TERIMPREGNASI DI DALAM Nata de coco SERTA AKTIVITASNYA SEBAGAI FOTOKATALIS Kamea, Olyvia; Aritonang, Henry; 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.11.2.2018.27939

Abstract

ABSTRAKTelah dilakukan penelitian tentang kemampuan fotodegradasi limbah zat warna methylene blue dengan menggunakan nanopartikel ZnO yang terimpregnasi di dalam nata de coco yang disintesis secara in situ. Kemampuan fotodegradasi dilakukan melalui penentuan konsentrasi methylene blue yang tersisa setelah interaksi dengan sampel dimana konsentrasi larutan methylene blue yang digunakan adalah sebesar 5 ppm yang disinari sinar UV-A selama 60, 120, 180 menit.  Penentuan konsentrasi dihitung berdasarkan absorbansi yang didapatkan dari hasil pembacaan uji Spektrofotometri Uv-Vis dan dalam rumus menghitung persen degradasi. Hasil penelitian menunjukkan bahwa waktu optimum untuk variasi waktu penyinaran 60 menit, 120 menit, dan 180 menit adalah variasi waktu 120 menit dengan persen degradasi sebesar 66,23%. Nanopartikel ZnO yang terimpregnasi di dalam nata de coco dikarakterisasi dengan metode Scanning Electron Microscopy (SEM) untuk mempelajari morfologi permukaan membran dan X-Ray  Diffraction (XRD) untuk mempelajari pola difraksi dan menentukan ukuran partikel dengan nilai yang diperoleh dari persamaan Scherrer sebesar 8,33 nm. ABSTRAKThe research has been carried out on the photodegradation ability of dyestuff waste methylene blue using impregnated ZnO nanoparticles in nata de coco that synthesized with in situ proccesed. The ability of photodegradation is done by determining the remaining concentration of methylene blue after interaction with the sample where the concentration of methylene blue solution used is 5 ppm which is irradiated with UV-A for 60, 120, 180 minutes. Determination of the concentration was calculated based on the absorbance obtained from the reading of the UV-Vis Spectrophotometry test and in the formula calculate the percent degradation. The results showed that the optimum time for variations of irradiation time of 60 minutes, 120 minutes, and 180 minutes was a variation of 120 minutes with percent degradation of 66.23%. ZnO nanoparticles impregnated in nata de coco were characterized by the Scanning Electron Microscopy (SEM) method to study membrane surface morphology and X-Ray Diffraction (XRD) to study diffraction patterns and determine particle size with values obtained from the Scherrer equation amounting to 8.33 nm.Keywords: Nanoparticles, nata de coco, ZnO, Ag, photodegradation, methylene blue.
ANALISIS STRUKTUR MIKRO DAN STRUKTUR KRISTAL KARBON TEMPURUNG KELAPA DAN POLIVINIL ALKOHOL (PVA) PADA TEMPERATUR TINGGI Rampe, Meytij Jeanne; Setiaji, Bambang; Trisunaryanti, Wega; ., Triyono
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.7.2.2014.7470

Abstract

Have been done conducted by micro structure study and crystal structure of coconut shell of coconut carbon andof polivinil alcohol. This research studied using alcohol polivinil (PVA) as material for stimulating growth of carboncrystal structure. Method of pelarut and calsination, temperature sintering 1500 oC and time heating done byprocess technology. Method analyse SEM-EDS for the examination of micro structure and chemical compositionand also XRD for the examination of carbon product material crystal structure. Product characterized showparticle swampy forest which not yet uniform and structure of semi-kristalin.Telah dilakukan kajian struktur mikro dan struktur kristal dari karbon tempurung kelapa dan polivinil alcohol(PVA). Penelitian ini mempelajari penggunaan polivinil alkohol (PVA) sebagai bahan utnuk menstimulasipertumbuhan struktur kristal karbon. Metode pelarut dan kalsinasi, sintering temperatur 1500 oC dan lamapemanasan dilakukan pada teknologi proses. Metode analisis SEM-EDS untuk pengujian struktur mikro dankomposisi kimia serta XRD untuk pengujian struktur kristal material produk karbon. Karakter produk yangdihasilkan menunjukkan sebaran partikel yang belum seragam dan struktur semi-kristalin.
POTENSI DAUN ALPUKAT (Persea Americana Mill) SEBAGAI SUMBER ANTIOKSIDAN ALAMI Katja, Dewa Gede; Suryanto, Edi; Wehantouw, Frenly
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.2.1.2009.65

Abstract

abstrak

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