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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
PENGARUH ASAM FORMIAT PADA BULU AYAM SEBAGAI ADSORBEN TERHADAP PENURUNAN KADAR LARUTAN ZAT WARNA TEKSTIL REMAZOL GOLDEN YELLOW RNL Sa'adah, Nailys
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Effect of Formic Acid to Hen Feathers As Adsorbent for Decreasing Concentration Levels of Remazol Golden Yellow RNL Textile Dye. Hen feathers is a waste that can be utilized because of the content of keratin existence. keratin is fiber protein containing amino acids such as cysteine. Research which is trying to modify a hen feathers by the addition of formic acid in adsorption method to decrease the levels of textile dye solution until now has not been reported. This study began by preparing the feather as adsorbent and then followed by treatment using formic acid for hen feathers. Results showed that feather adsorbent without and with formic acid treatment produced the different level of dye decrease. This is because the addition of formic acid can enlarge the pores of the hen feathers so that the resulting the more effective adsorption, indicated by the 66.09% increase in surface area, 29.22% increase in pore average and 114.93% % increase in total pore volume. While the value of the maximum adsorption capacity of untreated feathers and with formic acid treatment amounted to 7.892 mg/g and 10.471 mg/g.
Isolasi, Karakterisasi dan Amobilisasi α-Amilase dari Aspergillus niger FNCC 6018 Nisa', Khairun
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Aspergillus niger FNCC 6018. The purposes of this research are to get specific activity data of isolated α-amylase from Aspergillus niger FNCC 6018, get optimum condition of enzyme data, include: pH and temperature, and get activity data of immobilized α-amylase in matrix bacto agar and recurrence test. The method is use in this research to determine α-amylase activity test by measuring maltose that produce from α-amylase which hydrolize amylose with Bernfeld method using DNS (3,5-dinitrosalicylic acid). Amount of protein was measured by Lowry method using standard BSA (Bovine Serum Albumin). The result of this research show that α-amylase enzyme isolated from Aspergillus niger FNCC 6018 which ammonium sulphate fraction 3 (40-60%) has the highest specific activity amount 5.7 Unit/mg protein. Optimum condition α-amylase from Aspergillus niger FNCC 6018 was achieved at optimum pH value 5.0 and temperature 36οC. Immobilized α-amylase in matrix bacto agar had specific activity amount 1.95 Unit/mg protein and use until twice recurrence.
Isolasi, Identifikasi Serta Uji Aktivitas Antibakteri Senyawa Golongan Triterpenoid Dari Ekstrak Daun Binahong (Anredera cordifolia (Ten.) Steen) Terhadap Staphylococcus aureus dan Escherichia coli Murdianto, Agus Ria
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Isolation, identification, and antibacterial activity examination of triterpenoid compounds from leaves of Binahong (Anredera cordifolia (Ten.) Steen). Maseration of 1 kg dry powder of those leaves using n-hexane respectively yielded 43,2 g. The n-hexane extracts obtained contained triterpenoids based on fitochemical test of Lieberman-Burchard. Compound separation of the n-hexane extract using column chromatography produced isolate which contained triterpenoids in fraction A. The isolate inhibited the growth of Staphylococcus aureus and Escherichia coli at Minimal Inhibition Concentration 100 ppm with weak inhibition zone. The results of identification using UV-Vis spectrophotometry showed a maximum absorption at a wavelength of 239 nm. Based on FT-IR spectrogram shows the groups, there were OH , C=C, C-C, C=O, -C-H, -CH3,-CH2, and C-O. LC-MS spectrogram indicated that the isolated had a molecular weight 562 g / mol of suspected compounds 2,3,19,23-tetrahydroxy-12-ene-24,28-dimethyl ester.
SINTESIS DAN KARAKTER SENYAWA KOMPLEKS Cu(II)-EDTA DAN Cu(II)- C6H8N2O2S Nurvika, Dian
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)-EDTA and Cu(II)-C6H8N2O2S. This research was conducted to obtain complex compounds Cu(II)-EDTA and Cu(II)-C6H8N2O2S and knowing the character of the complex compounds through analysis of UV-Vis, AAS and FTIR. Synthesis of Cu(II)-EDTA is done by mixing CuSO4.5H2O and EDTA ligand in aquades, and then performed with refluks and magnetic stirrer, filtered, washed and dried in a desicator. Synthesis of complexes Cu(II)-C6H8N2O2S done by mixing CuSO4.5H2O that has been reconstituted in methanol with C6H8N2O2S that has been reconstituted and magnetic stirrer. The results is obtained precipitated Cu(II)-EDTA is blue and Cu(II)- C6H8N2O2S is tawny. UV-Vis analysis results of Cu(II)-8-EDTA have a maximum wavelength at 741 nm, while maximum wavelength of Cu(II)-8 C6H8N2O2S at 813,5 nm. FTIR analysis results indicate the presence of N atom and O atom in EDTA ligand and the presence of N atom in Sulfanilamide (C6H8N2O2S 0. The stability constants of Cu(II)-EDTA of 8.09 x 102 while the Cu(II)- C6H8N2O2S of 1.9596 x 103.
IDENTIFIKASI KOMPONEN PENYUSUN ASAP CAIR DARI AMPAS SAGU DAN KULIT BATANG TANAMAN SAGU (Metroxylon sagu Rottb) SERTA PENENTUAN SENYAWA FENOLAT TOTAL DAN AKTIVITAS ANTIOKSIDAN Aditria, Riswandi
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Liquid smoke is one or the other material which had depeloved as food recently. Potential of liquid smoke as preservatives very influence by its antioxidant activity that caused by phenol and its derivates content. In this research sago waste and sago palm stem shell had processed to be liquid smoke. Activity as foodstuffs preservation very strong correlation with indicator of it composer structure, total phenolic compounds, and antioxidant activity. Liquid smoke from sago waste had succeed obtained with yield 33% and liquid smoke from sago palm stem shell 44%. GCMS data is show existence some compounds with carbonyl group and phenolic, 10 compound had obtained which possess index similarity minimum 80% with reference compounds. Total phenolic compounds for sago waste and sago palm stem shell is 130.59 and 105.30 mg/g liquid smoke equivalent galic acid, respectively. Antioxidant activity test had obtained IC50 number is 303.63 mg/L at sago waste ligid smoke and 442.45 mg/L at sago palm stem shell. Liquid smoke from sago waste and sago palm stem shell have antioxidant activity that un potential, so that must existence more depeloving.
PEMANFAATAN LIMBAH ELEKTRODA AKI PADA PROSES ELEKTRODEKOLORISASI LARUTAN ZAT WARNA Apipah, Lutfia
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Industrial waste had caused some reduction of water quality, one of them is liquid waste of coloring or dyeing batik production which contains indigosol dye and remazol black B that being dumped to water directly while the environment has limited capability to degradate that dye. Electrolysis method had been chosen as one alternative to cope with dye waste, because its benefits compare to other methods which are effective and simple. One of supporting factor of this method is the electrode being used. This research is destined to decolorized indigosol and remazol black B dye, using PbO2/Pb from used battery as electrode and reducing Chemical Oxygen Demand (COD) number. This research using PbO2/Pb as electrode obtained from battery electrodes waste. This method electrolyze dye sample on 8 volt using PbO2/Pb electrode obtained from used battery and conducted in 150 minutes. Final result of the electrolysis will be qualitatively and quantitavely analyze using UV-VIS spectrophotometer, and analyze Chemical Oxygen Demand (COD). The research result indicated that the use of PbO2/Pb electrode from used battery can reduce color intensity, respectively by 98.02% and 99.42% each for indigosol and remazol black B dye, and could reduce COD number respectively to 28.47% and 51.47% for each dye.
PENGARUH ELEKTRODA GRAFIT-GRAFIT, ALMUNIUM-GRAFIT, DAN SENG-GRAFIT PADA ELEKTROLISIS KOBALT (Co2+ ) DENGAN PENGOTOR ION SENG (Zn2+ ) Wulansari, Rismita
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

A study concerning about  taking cobalt metal (Co2+) has been done.  The metal  with  drawal  can  be  done  in  various  method  like  electrowinning  with electrolysis principle. This research purpose is to determine influence of electrode variation such as C-C, Al-C, and Zn-C toward precipitation of cobalt. Electrolysis cell is composed of graphite anode (C) and varieted cathode such as graphite (C), alluminium  (Al), and zinc (Zn). Sample was made content of  ion Co2+ and Zn2+ with  electrolyte  solution  such  as HCl  for  anode and without  electrolyte  solution for  cathode,  andthen  both  of  sample  was  connected  with  KCl  salt  bridge. Electrolysis was  done  in  2,8 Volt  during  40 minute with  various  electrode  pair such as C-C, Al-C, and Zn-C. Solution from electrolysis was analysed using AAS (Atomic Absorption Spectroscopy). The result from analysis showed the decreased of  Co2+ concentration  before  and  after  analysis.  For  electrolysis  without impurities,  the  concentration was decreased by 105 ppm  (C-C), 70 ppm  (Al-C), 2and  100  ppm  (Zn-C),  meanwhile  when  electrolysis  used  impurities,  the concentration was decreased by 85 ppm (C-C), 50 ppm (Al-C), and 70 ppm (Zn-C).  The  highest  yield  was  obtained  when  electrolysis  used  C-C  electrode  pair which  is  7,9%  for  electrolysis  without  impurities and  for  electrolysis  with impurities the result 6,3%. The highest efficiency was obtained when electrolysis used Al-C electrode pair which is 11,7% when electrolysis without impurities and Zn-C was 23,48%  when electrolysis with impurities
MODIFIKASI ZEOLIT ALAM DENGAN SURFAKTAN HEKSADESILTRIMETILAMMONIUM KLORIDA SEBAGAI ADSORBEN ION NITRAT Budi, Eko Setyo
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

A study on modification of natural zeolite with surfactant hexadecyltrimethyl-ammonium chloride as nitrate ion adsorbent. This study aims to modification of natural zeolite with hexadecyltrimethylammonium chloride, to test the nitrate ion adsorption on the variation of the concentration and determine the maximum adsorption capacity. The research was conducted with zeolite activation stages adding HF 1% solution for 10 minutes and dried at 120 C for 4 hours, then added a solution of 2M NH4Cl for 4 hours and dried at a temperature of 250 C for 4 hours. The next stage is active zeolite modified with HDTMA-Cl using column system with a flow rate of 0.5 mL/min. Modification characterized by FTIR spectrophotometer while the nitrate ion adsorption tests on natural zeolite and surfactant modified zeolite done using batch for 24 hours. Measuring nitrate concentrations were adsorbed by UV-Vis spectroscopy at a wavelength 220 nm. The results of FTIR spectra showed that the active zeolite modification with HDTMA-Cl has been successfully carried out with the advent of tape 1404.18 cm-1, which shows the N+(CH3)3 as well as the emergence of the tape 2854.65 cm-1 and 2924.09 cm -1 shows the range of symmetric and asymmetric CH2 of amine. Adsorption on the nitrate test also showed that the maximum capacity of the Langmuir Isotherm equation of natural zeolite at 0.502 mg/g and the surfactant modified zeolite at 5.128 mg/g.
Pengaruh Penambahan Asam Askorbat Pada Bulu Ayam Sebagai Adsorben Terhadap Kemampuan Adsorpsi Ion Logam Kadmium (Cd2+) Dalam Larutan Khumairoh, Wilda
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

A study entitled "The Effect of the Addition of Ascorbic Acid as Adsorbents Rooster Feathers Against Metal Ion Adsorption Capability of Cadmium (Cd2 +) in Solution". The research aims to create an adsorbent ascorbic acid modified chicken feathers, chicken feathers characterize adsorbents before and after the modification of ascorbic acid by FTIR and SAA. Application of cadmium metal ion adsorption on conditioned by variations in contact time 20-140 minutes; pH 3-9, and the concentration of 50-300 ppm. Characterization by FTIR spectrophotometer to determine the groups that are on each adsorbent and to measure the average pore surface area and total pore volume were analyzed by SAA. The amount of metal ions adsorbed cadmium was analyzed using AAS, and the determination of adsorption capacity using the Langmuir isotherm equation. The results obtained feather adsorbent before and after the modified ascorbic acid each have a characteristic size of the average pore 1,17779.102 and 3,06246.102 ; adsorbent surface area of 1.211 m2 / g and 1.672 m2 / g, and total pore volume 4,924.10-3 cc / g and 9,269.10-3 cc / g. The best application of cadmium metal ion adsorption by the adsorbent feathers before and after the modified ascorbic acid on contact time of 60 minutes and 40 minutes, with the same pH is 7, and the adsorption capacity of 25.64 mg / g and 26.32 mg / g.
ISOLASI, IDENTIFIKASI DAN UJI ANTIOKSIDAN ASAM FENOLAT DALAM DAUN TEMPUYUNG (Sonchus arvensis L.) DENGAN METODE 1,1-DIFENIL-2-PIKRILHIDRASIL (DPPH) Yuliarti, Wulan
Chem Info Journal Vol 1, No 1 (2013)
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Abstract

Tempuyung (Sonchus arvensis L.) is widely used for a treatment of asthma, cough and soothe the nerves. Tempuyung leaf contains phenolic acids which exhibit antioxidant activity. This research begins with the preparation of the sample, were making the ethanol extract, isolation (through the stage without hydrolysis (HA), acid hydrolysis (HA) and alkaline hydrolysis (HB)) and identification of phenolic acids and test the antioxidant activity using DPPH method.The results from the isolation of fraction HA, HB and HT were identified using a TLC co-chromatography and quantitative analysis using TLC Scanner, whereas another isolates phenolic acids were identified using UV-Vis, FTIR, and LC –MS spectrophotometer. The result of dentification using a TLC co-chromatography and quantitative analysis using TLC Scanner showed that in fractions of HA, HB and HT is ferulic acid at levels of 4.855%, 4.267% and 8.376%. Based on the identification with UV-Vis, FTIR, and LC-MS spectrophotometer detected that isolate B (from a fraction of HB) is acid p-kumarat. Antioxidant activity assays were performed on extracts of ethanol and isolate B have a value of antioxidant activity (IC50), respectively for 150.860 ppm and 428.718 ppm. this result shows that the antioxidant activity of ethanol extract more greater than isolate B. However, isolates B have a potential to be developed as a source of antioxidant compounds.

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