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Chem Info
Published by Universitas Diponegoro
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Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
CHEMINFO JOURNAL adalah jurnal saintifik yang diterbitkan secara periodik 3 bulanan oleh Jurusan Kimia, Fakultas Sains dan Matematika Universitas Diponegoro Semarang. Jurnal ini sebagai media publikasi hasil karya ilmiah lulusan S1 Jurusan Kimia.
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Articles 50 Documents
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Search results for , issue "Vol 1, No 1 (2013)" : 50 Documents clear
FORMULASI LARUTAN DETERGEN DARI NATRIUM DODESIL SULFAT DAN SINTESIS NATRIUM DODESILBENZENA SULFONAT Adi N, Wiedy Paristya
Chem Info Journal Vol 1, No 1 (2013)
Publisher : Chem Info Journal

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Abstract

Detergent products has been used by almost all the inhabitants for various purposes such as washing clothes and furniture as well as other cleaning materials. Surfactants are good for cleaning are anionic surfactants, ionic surfactants in water kelaruan optimal C12 chain. Some anionic surfactant C12 made and developed, one of which was sodium dodecyl sulfate (SDS). Synthesis of sodium sulfonate dodesilbenzena was performed to compare dodesilbenzena detergency sodium sulfonate synthesized with sodium dodecyl sulfate. The ability of surfactants to removing contaminants less than perfect so necessary to the addition of sodium tripolyphosphate (STPP) as a builder, carboxymethyl cellulose (CMC) as well as the alkaline pH and buffer needs to be added besides the addition of STPP. Detergency sodium dodecyl sulfate (SDS) with the optimum addition of STPP 60%, pH 10.5; CMC 1%. Formula detergent was surfactant SDS obtained 23%; STPP 60%; CMC 1%; buffer NaHCO3 - NaOH and Na 2SO4 with a detergency of 86.989%. GC-MS analysis of the results of alkylating Friedel craft (phase 1), the spectra showed that the compound formed is Dodesilbenzene with tR 18.84, SI = 96. The results of neutralization (phase 3) has a melting point> 500oC estimated inorganic compounds.
STUDI INTERAKSI SEGMEN TRIMER KITOSAN DENGAN ASAM ASKORBAT SECARA KOMPUTASI AB INITIO DAN EKSPERIMEN Hasanah, Niswatun
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

STUDY of INTERACTION between CHITOSAN TRIMER SEGMENT and ASCORBIC ACID by QUANTUM AB INITIO and EXPERIMENT METHODS. The research has been done between chitosan trimer segments and ascorbic acid used quantum ab initio on theory and basis set RHF/6-31G(d,p) and experiment methods. The quantum ab initio method could be used to get the geometry structure of molecule that more stable and characteristics of intermolecular interaction in the gas phase as simulation of experiment method which too expensive. The aim of research is to determine interaction energy between chitosan trimer segment and ascorbic acid and determine encapsulation efficiency of chitosan on ascorbic acid concentration is 500 ppm. The result show that the interaction can occur between chitosan trimer segment and ascorbic acid with each energy of them were the first and the second configuration respectively -38.1538 kJ.mol-1 and -29.7388 kJ.mol-1. The first configuration position was preferred to others because its energy was greater. Its conclusion was interaction between chitosan trimer segment and ascorbic acid was medium hydrogen bond then the experiment result also prove the interaction between chitosan trimer segment and ascorbic acid shown by free ascorbic acid, filtrate of centrifugation result with encapsulation efficiency of chitosan 64.38 % for ascorbic acid 500 ppm.
SINTESIS DAN KARAKTERISASI SENYAWA KOMPLEKS Cu(II)-8- HIDROKSIKUINOLIN DAN Co(II)-8-HIDROKSIKUINOLIN Agustina, Laelatri
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Has done research about the synthesis and characterization of complex compounds of Cu(II)-hydroxyquinoline and Co(II)-8-hydroxyquinoline. This research was conducted to obtain complex compounds Cu(II)-8-hydroxyquinoline and Co(II)-8-hydroxyquinoline and knowing the character of the complex compounds through analysis of UV-Vis, AAS and FTIR. Synthesis of Cu(II)-8-hydroxyquinoline is done by mixing CuSO4.5H2O and 8-hydroxyquinoline ligand in methanol, and then performed with magnetic stirrer, filtered, washed and dried in a desicator. Synthesis of complexes Co(II)-8-hydroxyquinoline done the same way, with the starting materials CoSO4.7H2O. The results is obtained precipitated Cu(II)-8-hydroxyquinoline is green-yellow and Co(II)-8-hydroxyquinoline is yellow. UV-Vis analysis results of Cu(II)-8-hydroxyquinoline have a maximum wavelength at 394 nm, while maximum wavelength of Co(II)-8-hydroxyquinoline at 311 nm and 373 nm. FTIR analysis results indicate the presence of N atom and O atom of C-O clusters in 8-hydroxyquinoline ligand. The stability constants of Cu(II)-8-hydroxyquinoline of 1.206 x 105 while the Co (II)-8-hydroxyquinoline of 1.1299 x 104.
ISOLASI, KARAKTERISASI, DAN AMOBILISASI α-AMILASE DARI Aspergillus oryzae FNCC 6004 Jayanti, Dwi
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Isolation, characterization, and immobilization of α-amylase from Aspergillus oryzae FNCC 6004 done to obtain α-amylase was isolated from Aspergillus oryzae FNCC 6004 with the highest specific activity, get the data characteristics of α-amylase results isolation which include temperature and pH optimum, to get immobilized α-amylase, the activity of immobilized α- amylase, and reccurence test of immobilized α- amylase of Aspergillus oryzae FNCC 6004. Alpha amylase that successfully isolated a specific activity measurements subsequently before immobilization and carried out characterization that includes the determination of the optimum temperature and optimum pH and done immobilization using bacto agar matrix. The specific activity of α-amylase before immobilized of 3.26 Unit/mg of protein. The results of the characterization of α-amylase shows a optimum temperature of 40 °C and optimum pH 4.5. The activity of immobilized α-amylase after experiencing a decrease of 17.91 %, it that is from 6.81 Unit became 5.56 Unit with two times reccurence test.
ISOLASI, PURIFIKASI DAN KARAKTERISASI α-AMILASE DARI Saccharomyces cerevisiae FNCC 3012 Sari, Dewi Permata
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Isolation α-amylase from Saccharomyces cerevisiae FNCC 3012 were doing to get α-amylase that purified by gel filtration chromatograph method and was determined their characteristic like time incubation, pH and optimum temperature. Alpha amylase was god from any step like refresh, growth curve and isolation process using centrifugation. Alpha amylase was produced by Saccharomyces cerevisiae FNCC 3012 was found in fraction 5 in purified process used ammonium sulphate salt in saturated level 80-100% with specific activity 7.28 Unit/mg protein. purification process of α-amylase used gel filtration chromatograph used sephadex G-100 was increased specific activity up to 8.56 %. Alpha amylase from Saccharomyces cerevisiae FNCC 3012 have characteristic optimum time incubation before and after purified successively 42 minute and 40 minute, optimum pH 4.9 and optimum temperature is 23ºC.
Isolasi, Identifikasi Dan Uji Antioksidan Senyawa Flavonoid Dari Ekstrak Etil Asetat Daun Tempuyung (Sonchus arvensis L.) Ramadhani, Roshinta Anggun
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Isolation, identification, and antioxidant activity of flavonoid compounds from ethyl acetate extract leaves tempuyung (Sonchus arvensis L.) has been done. The results of identification using UV-Vis spectrophotometer with the solvent methanol produced 2 maximum light absorption at a wavelength of 253,0 nm (bands II) and 437,5 nm (bands I). The addition of shear reagent sodium hydroxide (NaOH), sodium acetate (NaOAc), boric acid (H3BO3), aluminum chloride (AlCl3), hydrochloric acid (HCl) and analyzed using FT-IR spectrophotometer indicating group (-OH stretching) reinforced with the -OH bending, = C-H aromatic stretching, -C-H stretching asymmetry and symmetry are amplified in the presence of –C-H bend, C=O, C=C aromatic, C-O ether (bridge O), benzene substituted ortho, meta and para, allegedly the compound is 6,7,4'-trihidroksiauron. In the antioxidant assay IC50 obtained in the ethyl acetate extract and flavonoids consecutive isolates at 473,28 ppm and 421,03 ppm, with quercetin as a comparison of 64,06 ppm.
FOTOELEKTROKATALISIS KROMIUM (VI) MENJADI KROMIUM (III) DENGAN MENGGUNAKAN ELEKTRODA TIMBAL DIOKSIDA (PbO2) Perdana, Muhamad
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Telah dilakukan penelitian tentang fotoelektrokatalisis kromium (VI) menjadi kromium (III) dengan menggunakan elektroda timbal dioksida (PbO2). Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan elektroda PbO2 dalam fotoelektrokatalisis kromium (VI) menjadi kromium (III) pada waktu minimum dan untuk mengetahui pH larutan terbaik untuk proses tersebut. Metode penelitian dari penelitian ini adalah pengukuran panjang gelombang maksimum, penentuan potensial aplikasi, fotoelektrokatalisis pada potensial tetap 5 volt dengan variasi waktu, fotoelektrokatalisis pada potensial tetap 5 volt dan waktu tetap dengan variasi pH, analisis dengan menggunakan UV-Vis. Hasil penelitian menunjukkan pH terbaik untuk fotoelektrokatalisis adalah pada pH 2 dengan waktu minimum yang diperlukan adalah 6 jam menghasilkan persen reduksi sebesar 82 %. Hasil tersebut menunjukkan bahwa dalam larutan asam proses fotoelektrokatalisis akan berlangsung dengan baik.
Isolasi, Karakterisasi, dan Uji Aktivitas Antioksidan Senyawa Tepenoid dari Kulit Batang Ketapang Kencana (Terminalia muelleri Benth.) Ranu Muindro, Miranti Verdiana
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Isolation, characterization, and antioxidant activity test of terpenoid compound from Ketapang kencana Terminalia muelleri bark have been carried out. Isolation was done by extraction, followed by fractionation, and purification. Characterization of chemical structure was conducted using spectrophotometer UV-Vis, FTIR, and GCMS. FTIR spectrum showed characteristic groups of C–O ether aliphatic, CH2, CH3, =C-H, and C=C aromatic. Identification by GCMS resulted that the compound molecular weight was 296 g/mol. The results of antioxidant activity test indicate that isolate from T. muelleri bark does not have a potentiality as antioxidant (IC50= 7424,462 ppm).
PENGARUH RASIO KATALIS ZEOLIT AKTIF/UMPAN PADA PROSES PIROLISIS LIMBAH SERBUK SAGU (Metroxylon sp) Damayanti, Endah Dewi
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Catalytic pyrolysis of waste starch powder using active zeolite catalyst has been carried out. The purpose of this study was to determine the ratio of catalyst/feed and compare the optimum catalyst containing compounds pyrolysis bio-oil yield. Catalyst characterization performed using X-ray diffraction and N2 gas adsorption. Bio-oil is produced characterized using Gas Chromatography-Mass Spectroscopy (GC-MS) to determine the content of compounds of pyrolysis bio-oil yield. As a result, the acidity of the active zeolite catalyst of 0.003 mol / g, the mineral content of the zeolite is mordenite and surface area, mean diameter and total pore volume of the catalyst amounted to 199.115 m2 / g, 20.55 Ã… and 66.1445 cc / g. Bio-oil produced at the optimum ratio of catalyst/feed 6% with the content of the compound is acetic acid with an abundance of 29.48%. The selectivity of zeolite catalysts active in the formation of compounds, namely methanol, acetone 2-propanone, and 2-furanone.
ISOLASI, IDENTIFIKASI SENYAWA ALKALOID TOTAL DAUN TEMPUYUNG (Sonchus arvensis Linn) DAN UJI SITOTOKSIK DENGAN METODE BSLT (Brine Shrimp Lethality Test) Murtadlo, Yazid
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Abstract: Tempuyung (Sonchus arvensis L.) from asteraceae tribe is one of the plants that have some compounds, one of them is Alkaloid. There has been done isolation of alkaloid compound to ethanol extract of tempuyung dry leave using extraction and preparative TLC with eluen n-hexane: ethyl acetate: ethanol (30:2:1). Analysis carried out on pure alkaloid isolate using method of UV-vis spectrophotometer, FTIR and LC-MS. Based on the analysis using UV-Vis spectrophotometer, FTIR and LC-MS can be a compound known alkaloid contained in the leaves tempuyung including alkaloids with the basic framework isokuinolin having absorption at a wavelength of 225 nm, 253 nm, and 352 nm, has a functional group C=N, O-H, C-O, conjugated C=C, C=O, CH2, CH3 and molecular weight compounds at 444.84 g/mol. The result of activity test using method of BSLT generates rate of LC50 from ethanol extract and total alkaloid isolate respectively 61.410 ppm and 523.634 ppm , it means the ethanol extract is less toxic and total alkaloid isolate is not toxic.

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