cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
Chem Info
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
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.
Arjuna Subject : -
Articles 66 Documents
 1   2   3   4   5 
ISOLASI, PURIFIKASI DAN KARAKTERISASI α-AMILASE DARI Saccharomyces cerevisiae FNCC 3012 Sari, Dewi Permata
Chem Info Journal Vol 1, No 1 (2013)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.22 KB)

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)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (691.492 KB)

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)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (278.896 KB)

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)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (33.364 KB)

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).
SINTESIS ISOPROPIL SINAMAT DARI SINAMALDEHID PADA MINYAK KAYU MANIS (Cinnamomum cassia) DAN UJI AKTIVITAS SEBAGAI ANTIDIABETES Anwar, Finalia Femmy; , S.Si., M.Si., Ngadiwiyana; Fachriyah, M.Si, Dra. Enny
Chem Info Journal Vol 1, No 2 (2013)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Has done research on use of synthesis isopropyl cinnamate of cinnamaldehyde in cinnamon oil (Cinnamomum cassia) and test activities as the antidiabetic. The purpose of this study was to isolate cinnamaldehyde of cinnamon oil, synthesis cinnamic acid, cinnamic isopropyl synthesis and test the antidiabetic activity. The method used in this study by using the method of oxidation and esterification through cinnamoil chloride. Analysis of compounds synthesis was using infra red spectrophotometry, gas chromatography-mass pectroscopy. Activity test of anti-diabetic compounds isopropyl cinnamic was with the measurement of inhibition α-glucosidase activity. Cinnamaldehyde which is isolated from cinnamon oil was yellow orange oil and cinnamaldehyde’s yield   1    was up to 76.41% and its purity was 99.87%. Cinnamaldehyde analysis using of infra red spectrophotometer showed carbonyl vibration at 1676 cm-1, C-H aldehyde at 2813.9 cm-1. From mass spectra, it can be known that cinnamaldehyde had M+ 132. Cinnamic acid which is oxidation was a white solid with yield was up to 41,89%. Cinnamic acid analysis using of infra red spectrophotometer showed O-H ad 3433.29 cm-1. Esterification of cinnamic acid chloride sinamoil through using 2-propanol produces brownish yellow liquid with a yield of as much as 84.62% and its purity was 98.43%. Isopropyl cinnamic analysis using of infra red spectrophotometer showed C-O ester at 1165.00 cm-1 and C-O isopropyl at 1111.10 cm-1. From mass spectra, it can be known that isopropyl cinnamic had M+ 190. At concentrations of 74.219 ppm isopropyl cinnamate synthesis results showed activity as antidiabetic of the enzyme that can inhibit α-glucosidase by 96.94% with IC50 value of 45.42 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)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (223.757 KB)

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)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.653 KB)

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.
PEMURNIAN CNT (CARBON NANOTUBE) HASIL SPRAY-PYROLISIS DENGAN OPTIMASI PERLAKUAN WAKTU REFLUKS DAN APLIKASINYA UNTUK ADSORPSI KLOROFOM Setyaningsih, Yeni
Chem Info Journal Vol 1, No 1 (2013)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (620.639 KB)

Abstract

Purification of carbon nanotubes has been carried out by the method of synthesis results using spray-pyrolisis reflux treatment by reacting carbon nanotubes with nitric acid (HNO3) and its application for the adsorption of chloroform. Reflux is done by the time variation of 1, 2, 3, 4, and 5 hours. Carbon nanotube (CNT) synthesis results and the results of reflux were analyzed using SEM (Scanning Electron Microscopy) and EDS (Energy dispersive X-ray Spectroscopy), and then applied to adsorption of chloroform. The results show that Fe impurities in carbon nanotubes decreases with increasing reflux time, while the adsorption capacity increased with increasing reflux time. Purity carbon nanotubes are the best in the carbon nanotube that reflux for 5 hours, while the ability of chloroform adsorption maximum of 5.8217 x10-4 g / mol to the carbon nanotube in which at reflux for 5 hours.
PENGOLAHAN LIMBAH CAIR INDUSTRI PERCETAKAN SECARA ELEKTROLISIS DENGAN ELEKTRODA KARBON/KARBON Wiskandini, Yunaska
Chem Info Journal Vol 1, No 1 (2013)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.1 KB)

Abstract

Offset industry potentially produces liquid waste that can pollute the environment. Generally, liquid industrial waste due to leaching of printing plates and film printing equipment like ink, turpentine, gasoline, and detergents. Offset industry wastewater contains many organic chemicals that are difficult to be degraded directly by environment such as alcohol, benzene, and contain heavy metal such as manganese. This research use electrolysis method with carbon as electrodes, Na2SO4 as the supporting electrolyte, H2SO4 and NaOH as adjuster to pH condition of the sample, to improve the quality of printing waste solution on the parameters were type, spacing and size of electrode and sample volume of wastewater, variated parameters were application potential, pH of the sample and electrolysis time. Analysis of the sample after electrolysis using Pelkin Elmer 1300 AAS, UV-Vis Spectrophotometer 1601, and Turbidity unit HAC 2100P. Electrolysis with application potential of 5 volts, pH 4 and electrolysis time 150 minutes resulted in COD, turbidity, and Mn values decreasing up to 91.08%, 99.40%, 97.85%, respectively. This result showed that electrolysis method can be applied to treat offset industry.
AKTIVITAS Fusarium oxysporum DALAM MENGHIDROLISIS ECENG GONDOK (Eichhornia crassipes) DENGAN VARIASI TEMPERATUR Rosdiana, Noermala Syari
Chem Info Journal Vol 1, No 1 (2013)
Publisher : Chem Info Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.223 KB)

Abstract

Research Has done about activity of Fusarium oxysporum to hydrolysis water hyacinth (Eichhornia crassipes) with variation temperature. This research aimed to getting Fusarium oxysporum were adapted on water hyacinth (Eichhornia crassipes) fermentation media and it getting the data reducing sugar value of cellulolytic activity from Fusarium oxysporum that can hydrolysis of water hyacinth (Eichhornia crassipes) on the optimum temperature. Activity of Fusarium oxysporum based on the size of the level reducing sugars resulting from the hydrolysis of water hyacinth. The study was conducted in several step that is rejuvenating of Fusarium oxysporum to PDB (Potato Dextrose Broth), adaptation of   Fusarium oxysporum to fermentation media CMC (Carboxyl Methyle Cellulose), delignification (lignin removal from water hyacinth), adaptation of Fusarium oxysporum to water hyacinth fermentation media, creating a standard curve of glucose, fermentation of Fusarium oxysporum in water hyacinth fermentation media with variation in temperature, and testing activities Fusarium oxysporum to hydrolyze water hyacinth with variation in temperature. The result shows that Fusarium oxysporum can grow in fermentation media of water hyacinth and it can degrade water hyacinth to reduction sugar. The higher activity from Fusarium oxysporum to produce cellulose for hydrolysis cellulose of water hyacinth happened in optimum temperature 30°C that result reduction sugars 0,308 mg/mL from 0,25 gram dry water hyacinth.

Page 3 of 7 | Total Record : 66

 1   2   3   4   5 

Filter by Year

2013 2015


Reset
Filter By Issues
All Issue Volume 3, Nomor 1, Tahun 2015 Vol 1, No 2 (2013) Volume 1, Nomor 1, Tahun 2013 Vol 1, No 1 (2013)