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Published by Universitas Islam Negeri Syarif Hidayatullah Jakarta

ISSN : 24606065 EISSN : 25483013 DOI : 10.15408/jkv

Core Subject : Science,

Chemistry

Jurnal Kimia Valensi is a biannual and peer-reviewed open access journal published by Department of Chemistry, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta. This journal covering all aspect of chemistry.

Arjuna Subject : Umum - Umum

Articles 10 Documents

Search results for , issue "Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016" : 10 Documents clear

Kandungan Fitokimia dan Bioaktivitas Ekstrak Metanol Biji Palem Putri (Veitchia merillii) adawiah adawiah
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Palem putri (Veitchia merillii) is a kinds of Araceae plant which has been used by the community in cure myopic eyes and for woman who have pregnant. However, research on the content of secondary metabolites and bioactivity of palm putri has never been done. This study aims to determine the phytochemical content, total polyphenols and flavonoids and bioactivity include antioxidant activity DPPH free radical scavenging, antidiabetic method alpha-glucosidase enzyme inhibition and toxicity of the methods Bhrine Shrimp Lethal Test (BSLT). Palem putri contains secondary metabolites, alkaloids, flavonoids, terpenoids, polyphenols, phenolic hydroquinone and saponins. The methanol extract of palm putri seed has a total polyphenol content and total flavonoids respectively 642.8 mg gallic acid / gram sample extract and quercetin 543.3 mg / gram sample extract, has a very strong antioxidant activity with IC50 value of 0.82 ppm, the level of toxicity is very toxic with LC50 values of 11.535 ppm. As well as having antidiabetic activity using the enzyme alpha-glucosidase inhibition with IC50 values of 1.97 ppm is even higher than the activity of the compound quercetin as a positive control. Keywords: Palem putri, bioactivity, antioxidant, antidiabetic, toxicity Palem putri (Veitchia merillii) is a kinds of Araceae plant which has been used by the community in cure myopic eyes and for woman who have pregnant. However, research on the content of secondary metabolites and bioactivity of palm putri has never been done. This study aims to determine the phytochemical content, total polyphenols and flavonoids and bioactivity include antioxidant activity DPPH free radical scavenging, antidiabetic method alpha-glucosidase enzyme inhibition and toxicity of the methods Bhrine Shrimp Lethal Test (BSLT). Palem putri contains secondary metabolites, alkaloids, flavonoids, terpenoids, polyphenols, phenolic hydroquinone and saponins. The methanol extract of palm putri seed has a total polyphenol content and total flavonoids respectively 642.8 mg gallic acid / gram sample extract and quercetin 543.3 mg / gram sample extract, has a very strong antioxidant activity with IC50 value of 0.82 ppm, the level of toxicity is very toxic with LC50 values of 11.535 ppm. As well as having antidiabetic activity using the enzyme alpha-glucosidase inhibition with IC50 values of 1.97 ppm is even higher than the activity of the compound quercetin as a positive control. Keywords: Palem putri, bioactivity, antioxidant, antidiabetic, toxicity DOI: http://dx.doi.org/10.15408/jkv.v2i1.3076

Sintesis dan Karakterisasi Grafena dengan Metode Reduksi Grafit Oksida Menggunakan Pereduksi Zn Yudha Taufantri; Irdhawati Irdhawati; Ida Ayu Raka Astiti Asih
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Graphene is a thin material, has a hexagonal two-dimentional lattice and is considered as an interesting material for adsorption process. Nowadays, graphene has been known as a potential material for diverse application, such as adsorbent. In this study graphene was synthesized from graphite. Furthermore, graphene was applied for adsorption of dichloro diphenyl trichloroethane (DDT). Graphene was synthesized by Hummer’s method using hydrothermal and reduced by Zn. The samples were characterized by Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) methods. The results of the XRD showed graphene structure in the 2θ, appeared at 23.9369 with interlayer spacing was about 3.71763 Å, compared with graphite oxide structure in the 2θ appeared at 11.2055 with interlayer spacing was about 7.89649 Å. The results of SEM analysis showed graphene has one layer with planar hexagonal structure and seems transparent whose single layer and multi layers. The graphene adsorption was analyzed by using the UV-Visible spectrophotometer. The results indicated the surface area of graphene was shown as 46.8563 m2/g. The amount of DDT adsorbed by graphene during 15 minutes was 7.5859 mg/g. This adsorption mechanism of DDT and graphene might be due to π-π and hydrogen interactions. Keywords: Adsorption, dichloro diphenyl trichloroethane (DDT), graphena. DOI: http://dx.doi.org/10.15408/jkv.v2i1.2233

Uji Kinerja Fotodegradasi Kain Terlapisi Komposit Nanosized Chitosan/TiO2 Terhadap Zat Warna Rhodamine B Eli Rohaeti; Endang Widjajanti Laksono FX; Anna Rakhmawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

The coating of nanosized Chitosan/TiO2 composit on cotton fabrics substrate and its performance for dye of Rhodamine B was studied. Nanosized Chitosan/TiO2 composit coated on cotton fabrics was done by dip-coating method through pad-dry-cure technic. Cotton fabric thats was coated by nanosized Chitosan/TiO2 composit was characterized by SEM, XRD, and FTIR. Photodegradation Performance test of cotton fabric coated Nanosized Chitosan/TiO2 composit for dye of Rhodamine B was done under UV ray and sun ray. It was concluded that was cotton fabric coated nanosized Chitosan/TiO2 can decompose dye of Rhodamine B with UV ray more effective than sun ray. Keywords : Dip-coating, photodegradation, nanosized chitosan/TiO2, cotton fabric, rhodamine B DOI: http://dx.doi.org/10.15408/jkv.v2i1.3083

Pembuatan Katalis Asam (Ni/γ-Al2O3) dan Katalis Basa (Mg/γ-Al2O3) untuk Aplikasi Pembuatan Biodiesel dari Bahan Baku Minyak Jelantah Savitri Savitri; Agung Setia Nugraha; Isalmi Aziz
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Biodiesel is an alternative energy fuel a substitute for diesel oil produced from vegetable oil or animal fat which have the advantage easily used, they are biodegradable, not toxic and sulfur free. This research aims to do process of prosucing biodiesel using acid catalysts (Ni/γ-Al2O3) for a esterification process and base catalyst (Mg/γ-Al2O3) for transesterification process with the variation of catalyst concentration Ni/γ-Al2O3 (0.5%; 0.75%; 1% and 2%) and the time (60 minutes, 120 minutes, and 180 minutes). Research of methodology starting to the process impregnation Ni and Mg metal into a buffer γ-Al2O3, characterization a catalyst with XRD, FTIR, and the SAA, and the esterification process to lower levels of FFA and transesterification process for making it biodiesel. The characterization with X-RD does not appear a new peak, only just occurred a shift peak, and declines intensity of Ni/γ-Al2O3 and Mg/γ-Al2O3. The analysis result of the SAA, a decline in the surface area (the decline in active side of catalyst) suspected the process impregnation not run perfect because Ni and Mg metal only distributed on the surface of buffer pore. The results of the FTIR analysis does not occur the addition of acidity and alkalinity. The steady of catalyst concentration from esterification process is 1% within 120 minutes produce levels of FFA 6.85%. Keywords: Biodiesel, esterification, impregnation, used cooking oil, transesterificationDOI : http://dx.doi.org/10.15408/jkv.v2i1.3104

Kemudahan Biodegradasi Selulosa Bakteri dari Limbah Cucian Beras dengan Penambahan Gliserol, Kitosan, dan Nanopartikel Perak Agung Nugaraha Catur Saputro; Baki Mulyani; Nanik Dwi Nurhayati; Yunita Kurniawan
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

The objectives of this research were to study the effect of glycerol and chitosan addition toward biodegradability of cellulose based rice waste water, the effect of biodegradation time toward mass lost and biodegradability, and determine functional group and crystalinity of the highest biodegradability composite. Bacterial celluloses were prepared from 100 mL rice waste water that fermented by Acetobacter xylinum for 7 days with addition of glycerol (for Cellulose-Glycerol and Cellulose-Glycerol-Chitosan). Then, bacterial celluloses were immersed in chitosan solution (for Cellulose-Chitosan and Cellulose-Glycerol-Chitosan). The water in bacterial cellulose and its composites was removed by heating, then deposited silver nanoparticle on the bacterial cellulose and its composite. The silver nanoparticles were prepared by chemical reduction with using AgNO3 solution, trisodium citric as reducing agent, and gelatin as stabilizer. The silver nanoparticle was deposited into bacterial cellulose and its composites film by immersing method. After that, the bacterial cellulose and its composites were biodegradated by soil burrial test method for 14 days. Then, cellulose with the highest biodegradability was characterized by ATR-FTIR and XRD. The silver nanoparticle formation was showed by UV-Vis spectrum with peak in the 418.8 nm area. The glycerol addition can increase biodegradability, whereas the chitosan addition can decrease biodegradability. The increasing of biodegradation time, mass lost increased but the biodegradability decreased. After biodegradation, intensity of pyran cyclic in cellulose-glycerol which is deposited Ag (SG + Ag) decreased, but crystallinity of it increased. Keywords : Biodegradation, glycerol, chitosan, silver nanoparticle, bacterial cellulose. DOI: http://dx.doi.org/10.15408/jkv.v2i1.3111

Efektivitas Pemanfaatan Serbuk Gergaji dan Limbah Media Tanam Jamur (Baglog) sebagai Bahan Baku Pembuatan Biogas Dikdik Mulyadi; Lela Mukmilah Yuningsih; Desi Kusumawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Biogas is one of energy that can be produced by anaerobic fermentation of the organic compounds. The objective of this study was to determine the effectiveness of the utilization of waste of media mushroom growth (baglog) with sawdust as raw material for biogas with cow dung activators. The study was conducted through anaerobic fermentation of the samples containing waste baglog (sample 1) and sawdust (sample 2), with the addition of cow manure activator to each sample. Both of these samples do anaerobic fermentation for 32 days, then measuring the volume of biogas every 4 days for 32 days. Methane content in samples 1 and 2 measured by using gas chromatography. To see the effect of the addition of activators cow dung biogas volume measurement was carried out with cow dung without addition baglog waste and sawdust. The process of degradation baglog and sawdust with an activator of cow dung could be observed in some of the parameters through total solids (TS), total volatile solids (TVS), volatile fatty acids (VFA), the degree of acidity (pH), and C/N ratio. The results showed that effectiveness of sample 1 resulted in the everage of total volume biogas 28% higher than sample 2. The content of methane in sample 1 and sampel 2 was 54% %, and 0.21% respectively. The fermentation process biogas production in this experiment was carried out at pH 7, with a value of TS, TVS and VFA showed a decrease trend after the fermentation process, C/N ratiowas lower than the baglog waste sawdust until day 32 retention time. Keywords: Sawdust, baglog waste, biogas, fermentation, methane DOI : http://dx.doi.org/10.15408/jkv.v2i1.3100

Karakterisasi Senyawa Hasil Isolasi dari Ekstrak Etil Asetat Daun Namnam (Cynometra Cauliflora L.) yang Memiliki Aktivitas Antibakteri Tiah Maharani; Dede Sukandar; Sandra Hermanto
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i1.3084

Namnam is known as a plant family of fabacea that contains phenolic compounds with diverse biological activities including antibacterial. The aim of this study was to isolate and characterize the antibacterial activity of compounds isolated from ethyl acetate extract of the leaves namanam (Cynometra cauliflora L.). Extraction was done by maceration, fractionation by column chromatography, antibacterial essay by disc diffusion method, and characterization of compounds with UV-Vis, FTIR spectroscopy and LCMS. Ethyl acetate extracts have antibacterial activity with inhibition zone respectively 12.25 and 6.00 mm to Escherecia coli and Stapilococcus aureus at a concentration of 100,000 ppm. The results of column chromatography fractions 23-30 yielded three isolates with Rf 0.20 cm; 0.33 cm and 0.87 cm. Characteristics of antibacterial active compounds in isolates 2 (Rf 0.33 cm) is based on the analysis results are UV-Vis absorption at λmaks 206.93 nm, 268.40 nm, 328.58 nm, 383.98 nm and 386.98 nm , FTIR (KBr) showed -OH group 3415.68 cm-1, CH 2958.10 cm-1, C = C aromatic 1651.18 cm-1, C-OH cyclic 1019.88 cm-1 and CH aromatic 694.56 cm-1 and LCMS produce three main peak at a retention time of 4.82; 6.87 and 7.64 which is thought to be the compound 2-isopropyl-5-metilsikloheksil 2-hidroksipropanoat, Cuelure, and 2-[(2-Hydroxycyclohexyl) oxy] cyclohexanecarboxylate. Key word: antibacterial, disc diffusion, Namnam (Cynometracauliflora L.). DOI: http://dx.doi.org/10.15408/jkv.v2i1.3084

Analisis Sifat Fisika dan Kimia Lignin Tandan Kosong Kelapa Sawit asal Desa Sape, Kabupaten Sanggau, Kalimantan Barat Siti Suhartati; Rachmat Puspito; Fikri Rizali; Dian Anggraini
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i1.3102

Analysis of the physical and chemical properties of palm empty fruit bunches (EFB) lignin from Sape village in Sanggau, West Borneo has been done. This research was aimed to find extract and isolate the EFB lignin, to determine density, and viscosity of black liquor containing EFB lignin and to find the purity, moisture content and ash content of isolated EFB lignin. Black liquor was extracted by using reflux process and the lignin was isolated by using organosolv process. The result showed that the density and viscosity of the black liquor was 0.9658 g/mL and 1.4565 Ns/m2, respectively. The isolated lignin isolated has purity about 64.64% with moisture content about 3.07% and the ash content about 30.34%. The data from this analysis became the basis of utilization of lignin TKKS in some lignin-based industries. Key words: Analysis of physical and chemical properties, lignin, EFB DOI: http://dx.doi.org/10.15408/jkv.v2i1.3102

Pembuatan Biodiesel dengan Cara Adsorpsi dan Transesterifikasi Dari Minyak Goreng Bekas Lisa Adhani; Isalmi Aziz; Siti Nurbayti; Christie Adi Octavia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i1.3107

Used cooking oil can be used as raw material for biodiesel, but the levels of free fatty acids (Free Fatty Acid, FFA) is quite high. It is necessary for pretreatment in the form of the adsorption process to reduce levels of FFA. This study aims to determine the optimal conditions of adsorption process and determine the quality of biodiesel produced from adsorption processes and transesterification. Natural zeolites are used as adsorbents activated beforehand using ammonium chloride, calcined and heated to obtain H-zeolite. Furthermore, the adsorption process optimization includes the time, the adsorbent concentration, temperature and particle size. The oil that is already in the adsorption catalyst is reacted with methanol and KOH to obtain biodiesel. The optimum adsorption conditions obtained at the time of 90 minutes, the concentration of H-zeolite 12%, temperature 90 ° C, and a particle size of 0.2 mm that can lower FFA levels from 3.2% to 1.1%. Biodiesel produced meets the quality requirements of SNI 04-7182-2006 with a water content of 0.02%, a density of 857.60 kg / m3, the acid value of 0.29 mg-KOH / g, iodine number 15.71, saponification 168 , 02 and cetane index of 75.62. Compounds contained in biodiesel are methyl 9-octadecanoic (49.45%), methyl heksadekanoat (20.79%), and methyl 9,12oktaekanoat 9.12 (18.87%). Keywords: Biodiesel, used cooking oil, adsorption, transesterification, H-zeolitDOI: http://dx.doi.org/10.15408/jkv.v2i1.3107

Pengaruh Aktivasi Arang Aktif dari Tongkol Jagung dan Tempurung Kelapa Terhadap Luas Permukaan dan Daya Jerap Iodin Lela Mukmilah Yuningsih; Dikdik Mulyadi; A Jaka Kurnia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i1.3091

The activated charcoal can be produced from various raw material which contains carbon such as corn cobs and coconut shell. Generally, activated charcoal made through activation process with added chemical materials. The kind of activator will give different influence on surface area or pores volume of the result activated charcoal. In this study, will be made activated charcoal from corn cobs and activated by physical and chemical with KOH activator. Carbonation process is performed at 800oC for 2 hours and followed by chemical activation process by KOH with mass ratio water: charcoal: KOH is 1:1:4, then activated by physical at 600oC for 4 hours. Conducted test on sample contain iodine adsorption and SEM. As a result, iodine adsorption of activated charcoal indicated at KOH 20%. the best adsorption of coconut shell activated charcoal is 1240.233 mg/g with surface area 2352.851 m2/g, while corn cobs activated charcoal is 1133.757 mg/g with surface area 2150.866 m2/g. Morphology of activated charcoal with KOH 20% have pore structure with high 22.63 µm and wide 26.41 µm, the resulting pore size included into macropores structure. Keywords: Activated charcoal, carbonation, activation, adsorption, surface area. DOI: http://dx.doi.org/10.15408/jkv.v2i1.3091

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Dr. Sandra Hermanto, M.Si

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hermantokimia@uinjkt.ac.id

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+6285220042401

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kimia@uinjkt.ac.id

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Program Studi Kimia, Fakultas Sains dan Teknologi, UIN Syarif Hidayatullah Jakarta

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Kota tangerang selatan,

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Dr. Sandra Hermanto, M.Si

Contact Email hermantokimia@uinjkt.ac.id

Phone +6285220042401

Journal Mail Official kimia@uinjkt.ac.id

Editorial Address Program Studi Kimia, Fakultas Sains dan Teknologi, UIN Syarif Hidayatullah Jakarta

Location Kota tangerang selatan, Banten INDONESIA

Abstract

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Abstract

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Abstract

Abstract

Abstract

Abstract

Contact Name
Dr. Sandra Hermanto, M.Si

Contact Email
hermantokimia@uinjkt.ac.id

Phone
+6285220042401

Journal Mail Official
kimia@uinjkt.ac.id

Editorial Address
Program Studi Kimia, Fakultas Sains dan Teknologi, UIN Syarif Hidayatullah Jakarta

Location
Kota tangerang selatan,

Banten

INDONESIA