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Jurnal Periodic Jurusan Kimia UNP

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Published by Universitas Negeri Padang

ISSN : - EISSN : 23391197 DOI : https://doi.org/10.24036/p.v11i2.113715

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Materials Science & Nanotechnology

Periodic adalah jurnal nasional yang berisi artikel-artikel bidang ilmu kimia, seperti bidang Kimia Analitik, Kimia Fisika, Kimia Anorganik, Kimia Organik dan Biokimia. Jurnal ini mempublikasikan hasil penelitian original, komunikasi singkat, dan artikel review. Artikel yang telah diterbitkan dalam jurnal ini berarti bahwa kegiatan penelitian yang diterbitkan adalah belum, dan tidak akan diterbitkan di tempat lain. Periodic (e-ISSN 2339-1197) diterbitkan oleh Jurusan Kimia dan mulai tahun 2022 disebut Departemen Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Padang, Indonesia. Periodic terbit berdasarkan berdasarkan surat edaran Direktorat Jenderal Pendidikan Tinggi No. 152/E/T/2012 tentang publikasi karya tulis ilmiah dan terbit sejak Oktober 2012.

Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)

Articles 343 Documents

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Isolasi dan Karakterisasi Flavonoid dari Daun Belimbing (Averrhoa carambola Linn.L) Rido Ardianto; Yustini Ma’aruf; Sri Benti Etika
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

Research of isolation and characterization of flavonoids from the leaves of star fruit (Averrhoa carambola Linn.L) has been done. A 393 g of condensed methanol extracts obtained from 5 kg of fresh leaves starfruit. The methanol extract of hot water added, further fractionated successively with n-hexane and ethyl acetate, resulting in a 4000 ml n-hexane fraction and 5000 ml of ethyl asetat. The flavonoid phytochemical test from the fractionation showed negative fraction of n-hexane, ethyl acetate fraction and water fraction flavonoid positive. Results separation by column chromatography ethyl acetate fraction concentrated extract produced 6 fractions, namely fraction A, B, C, D, E and F. Characterization using UV light gives a brown before chromatograms steamed green ammonia and gives a dark brown color after steamed with ammonia. Based on the existing literature is suspected in fraction B contained flavones glycosides, biflavonil or unusual tersulih flavons.

Penentuan Kondisi Optimum Proses Degradasi Methanil Yellow Pada Reaktor Fotokatalitik TiO2/SiO2 Irene Praticia Irwan; Hardeli Hamzah; Hary Sanjaya
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 1 (2012)
Publisher : Departemen Kimia FMIPA UNP

Photocatalytic reactor is a device used to degrade organic pollutants. In this study, researchers used TiO2/SiO2 photocatalytic reactor to degrade dye yellow methanil 20 ppm. This study aims to determine the number of columns used glasses and long irradiation optimum TiO2/SiO2 photocatalytic reactor to degrade methanil yellow dye. In this study, the used TiO2 Degussa P-25 with the addition of SiO2 which aims to reduce pore size and extend catalyst surface thereby optimizing the photocatalytic activity of TiO2 films. Variations in the amount of glass columns used were 3, 5, 7, 9, and 11 columns. While the variation of irradiation time is longer irradiation are 1, 2, 3, 4, 5, 6, hours. After the process of degradation, absorbance was measured using a spectrophotometer methanil yellow UV-Vis and degradation products formed at the optimum conditions were identified using GC-MS. Characterization of TiO2/SiO2 crystals using XRD. The result showed the optimum conditions methanil yellow degradation at a concentration of 20 ppm in the photocatalytic reactor that is, the number of columns as much as 9 cups of fruit and a long column of irradiation for 4 hours. In this condition, the percentage obtained by degradation of 12.63% with a flow rate of 95 ml / s and as much as 5x the amount of coating coating.

Karakterisasi dan Uji Toksisitas Asap Cair dari Sabut Pinang (Areca catechu L) Resi Herawati; Iryani Iryani; Usman Bakar
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012)
Publisher : Departemen Kimia FMIPA UNP

It has researched about the characteristics and toxicity test liquid of liquid smoke from fibrous shell of areca nut (Areca catechu L). The purpose of this research is to find the compoundscontained in liquid smoke from fibrous shell of areca nut and the dosage of liquid smoke which gives effect of toxic. This research is begun with producing liquid smoke at pirolisis temperature 300oC. Liquid smoke produced is decantated, defiltrated and dedestilated at 100-105oC. Each liquid smoke is characterized by using GC-MS. Furthermore, the toxicity of the liquid smoke destilated is tested to the animal test at dosage 50,500,5000 and 15.000 mg/kg of the body weight and as a control without giving liquid smoke. Observation is done during 14 days to mortality of mice and the mice which are still alive will be weighed its weight. Based on the result, it is found that the components structured the liquid smoke. It consists of fenol, carbonil, and carboksilate acid. From toxicity test, liquid smoke obtained at the great dosage; 15.000 mg/kg body weight of mice is not toxic and giving liquid smoke declines the the body weight of mice.

IDENTIFIKASI FRAGMEN GEN 16S rRNA BAKTERI ASAM LAKTAT UBC-DA-08 DARI DADIH Ike Ramadhanty Daniel; MInda Azhar
Jurnal Periodic Jurusan Kimia UNP Vol 8, No 1 (2019): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Bacterial identification can be done by phenotypically and genotypes use the 16S rRNA gene. This study aims to determine the species of lactic acid bacteria isolates in Dadih. The first step of identification of bacteria by screening and isolating lactic acid bacteria found in Dadih, then isolate the bacterial isolate chromosome DNA from screening (UBC-DA-08).Bacterial chromosome DNA was used as a template for amplification of the 16S rRNA gene using the PCR method.Amplikon was electrophoresed using agarose gel and purified for sequencing.Sequencing of the 16S rRNA gene was carried out using the Dideoxy-Sanger method.Sequencing bases of nucleotide sequences were analyzed using the DNAStarprogram.The 16S rRNAgene size ofthe UBC-DA-08 bacterial isolate consisted of 896 bp (base pair).The nucleotide sequence of the 16S rRNA gene can be read using the BLASTn andMEGA programs.The results of identification of UBC-DA-08 bacterial isolates were lactic acid bacteria including the Lactococcuslactis groupKeyword :Dadih, Lactic Acid Bacteria, Gene 16S rRNABacterial identification can be done by phenotypically and genotypes use the 16S rRNA gene. This study aims to determine the species of lactic acid bacteria isolates in Dadih. The first step of identification of bacteria by screening and isolating lactic acid bacteria found in Dadih, then isolate the bacterial isolate chromosome DNA from screening (UBC-DA-08).Bacterial chromosome DNA was used as a template for amplification of the 16S rRNA gene using the PCR method.Amplikon was electrophoresed using agarose gel and purified for sequencing.Sequencing of the 16S rRNA gene was carried out using the Dideoxy-Sanger method.Sequencing bases of nucleotide sequences were analyzed using the DNAStarprogram.The 16S rRNAgene size ofthe UBC-DA-08 bacterial isolate consisted of 896 bp (base pair).The nucleotide sequence of the 16S rRNA gene can be read using the BLASTn andMEGA programs.The results of identification of UBC-DA-08 bacterial isolates were lactic acid bacteria including the Lactococcuslactis group. Keyword :Dadih, Lactic Acid Bacteria, Gene 16S rRNA

Analisis Kandungan Besi (Fe) dan Nikel (Ni) dalam Bijih Mangan di Daerah Taming Tonga Kabupaten Pasaman Barat secara Spektrofotometri Serapan Atom Dony Yulvi; Amrin Amrin; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 1, No 2 (2012)
Publisher : Departemen Kimia FMIPA UNP

Telah dilakukan penelitian tentang analisis kandungan besi dan nikel dalam bijih mangan yang tedapat di daerah taming tonga secara spektrofotometri serapan atom. Penelitian ini bertujuan untuk menentukan kandungan besi (Fe) dan nikel (Ni) dengan variasi pelarut, variasi ukuran partikel secara spektrofotometri serapan atom. Penelitian ini menggunakan metoda destruksi basah, dimana proses pendestruksian dilakukan dengan beberapa variasi yaitu variasi pelarut : HCl pekat, HNO3 pekat, dan HCl-HNO3 pekat (3:1), variasi ukuran partikel yaitu ≤ 63 µm, > 63 - ≤ 75 µm, dan > 75 - ≤ 90 µm. Hasil Penelitian ini menunjukkan kadar besi tertinggi didapatkan dengan menggunakan pelarut Aquaregia yaitu 10,402 % dengan ukuran partikel ≤ 63 µm sedangkan kadar nikel tertinggi didapatkan dengan menggunakan pelarut HNO3 yaitu 0,504 % dengan ukuran partikel terbaik ≤ 63 µm.

Isolasi dan Karakterisasi Flavonoid dari Kulit Buah Manggis (Garcinia mangostana L.) Sabariah Sabariah; Nazulis Z
Jurnal Periodic Jurusan Kimia UNP Vol 2, No 2 (2013)
Publisher : Departemen Kimia FMIPA UNP

Have been done the isolation of flavonoids of the fruit hulls of mangosteen (Garcinia mangostana L.) in theChemistry Research Laboratory, Faculty of Mathematics and Sciences, State University of Padang. This research to isolate and know the characteristics of the compound flavonoid of the fruit hulls of mangosteen. Isolation method was used macerated with methanol, and followed by fractionation with n-hexane and ethyl acetate. Separation of ethyl acetate fraction by column chromatography using silica, ethyl acetate eluent used: methanol in SGP. Isolation purity test results performed by TLC and melting point. Pure flavonoids obtained as a yellow amorf 0.0012 g with a melting point range from 279.8 to 280.7˚C. Color reagent test results with10% NaOH, concentrated H2SO4, and Mg-HCl showed the presence of flavonoids. The test results showed stains KKt-2A is in the region aglycone: flavonols. From the data analysis,IR spectra showed the presence of the-OH, C-O-C ether and aromatic C=C. While the UV-Vis spectra showed the presence of a cluster of -OH on C-4’. From the above data allegedly isolated flavonoids is aflavonol with the-OH at C-4'.

ANALISIS FORMALIN DALAM SAMPEL IKAN TONGKOL MENGGUNAKAN FLUORAL-P SEBAGAI PENGOMPLEKS SECARA SPEKTROFOTOMETRI UV-VIS Juli Manda Sari; Indang Dewata; Edi Nasra
Jurnal Periodic Jurusan Kimia UNP Vol 5, No 2 (2016)
Publisher : Departemen Kimia FMIPA UNP

Had been observed the research on the analysis of formaldehyde in samples of mackarel tuna using fluoral-p as complexing UV-Vis spectrophotometry. This study aims to obtain optimum conditions and validation of analytical methods and analyze the levels of formaldehyde in the mackarel tuna using fluoral-p as a complexing agent. The method used in this research that UV-Vis spectrophotometry, where formaldehyde is reacted with fluoral-p form compounds 3,5-diacetyl-1,4-dihidrolutidin (DDL) yellow and measured at a wavelength of 412 nm using a UV-Vis spectrophotometer. Phase optimization done of the effect of pH, complexing time and stability of the complex. While the validation phase methods of analysis undertaken include the manufacture calibration curve and linearity, LOD and LOQ, precision test and test accuracy. The results showed that the complex solution of formalin and fluoral-p optimum at pH 4 with a complexing for 75 minutes. Validation of the methods result in the regression equation Y = 0.022x + 0.013 with a correlation coefficient (r) = 0.0989, LOD value of 0.2 ppm and 0.6 ppm LOQ values, and average% recovery was 101.7%. Formaldehyde levels were obtained in samples mackarel tuna originating from the Pasar Lubuk Buaya and SPAR Supermarkets identified containing formaldehyde levels exceed a safe threshold is 6 ppm and 20 ppm.

PREPARASI DAN KARAKTERISASI KOMPOSIT SELULOSA BAKTERIAL – RUMPUT LAUT (Eucheuma cottonii) UNTUK APLIKASI BIOMEDIS Febbi Rahmayuni; Edi Nasra; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 5, No 2 (2016)
Publisher : Departemen Kimia FMIPA UNP

Composite bacterial cellulose - seaweed (BC-SW) was prepared by immersing the bacterial cellulose (BC) in seaweed extract (SW) for 1,2,3, and 4 days. Has researched the effect of immersion time on the physical and mechanical properties of the composite, the result showed that longer of immersion time decreases the water content, the higher the compressive strength, tensile strength and elasticity BC-SW composite. From the research done, the content of BC reached 99 156% while for BC-SW composite decreased water content of up to 98 585%. In the compressive strength test, the compressive strength of BC is 0292 MPa, while the BC-SW composite the compressive strength increased 2 times to 8 times stronger than BC. The value of physical and mechanical properties have not been suitable with the standards for the manufacture of cartilage. Analysis of the structure of KSB-RL was observed using FTIR and XRD. Results of FTIR spectra showed no new functional groups but only experienced a slight shift in the vibrational wave numbers.

IDENTIFIKASI MOLEKULER GEN 16S rRNA ISOLAT BAKTERI PENDEGRADASI INULIN DARI RIZOSFER UMBI DAHLIA Destriana Destriana; Minda Azhar; Budhi Oktavia
Jurnal Periodic Jurusan Kimia UNP Vol 5, No 2 (2016)
Publisher : Departemen Kimia FMIPA UNP

Gen 16S rRNA dapat digunakan untuk identifikasi spesies bakteri secara molekuler. Pada penelitian telah dilakukan identifikasi molekuler gen 16S rRNA isolat bakteri pendegradasi inulin dari rizosfer umbi Dahlia yang diberi kode RZ-01. Penelitian ini bertujuan untuk menentukan spesies isolat bakteri RZ-01. Isolasi DNA kromosom bakteri dilakukan sesuai metode yang dimuat pada Wizard Genomic Purification Kit by Promega. DNA kromosom isolat bakteri RZ-01 diidentifikasi dengan elektroforesis DNA. Gen 16S rRNA diamplifikasi dengan metoda Polymerase Chain Reaction (PCR) menggunakan primer BactF1 dan UniB1. Amplikon produk PCR adalah gen 16S rRNA isolat bakteri RZ-01, kemudian ditentukan urutan basa nukleotidanya berdasarkan metoda dideoxcy-Sanger menggunakan primer UniB1. Urutan basa nukleotida gen 16S rRNAisolat bakteri RZ-01dibaca menggunakan progam DNASTAR dan dianalisis menggunakan program BLASTn, Clustal Omega dan Mega 6. Ukuran fragmen gen 16S rRNAisolat bakteri RZ-01 yang diperoleh 724 bp.Konsentrasi DNA kromosom isolat bakteri RZ-01 diperkirakan 50 ng/µL. Hasil identifikasi menunjukkan isolat bakteri RZ-01 termasuk kedalam kelompok spesies Enterobacteraerogenes.

PREPARASI DAN KARAKTERISASI KOMPOSITSELULOSA BAKTERIAL-EKSTRAK DAUN KACA PIRING(Gardenia augusta) UNTUK APLIKASI BIOMEDIS Silvia Dewi Sartika; Ananda Putra; Ali Amran
Jurnal Periodic Jurusan Kimia UNP Vol 5, No 2 (2016)
Publisher : Departemen Kimia FMIPA UNP

Bacterial Cellulose (BC) was fermented coconut water with the aid of Bacteria Acetobacter xylinum. The generated BC became composite by adding a natural ingredient of Ectract of Gardenia augusta Leaves (EGAL). Gardenia augusta leaves was an annual shrub of the coffee genus or rubiaceae. Gardenia augusta leaves contain of chemicals such as flavonoids, saponins, tanins, galat and steroid or terpenoids. This research aimedat determining the effect of immersion time of Bacterial Cellulose in EGAL within 1,2,3 and 4 days onphysical properties (water content), mechanical properties (Compressive Strength using Toni technik Compressive Test Bauform Model 2020 and Tensile Strength using Buchel B.V Horizontal Tensile Tester model No. K465,item 84-58-00-0002 range 500N, 230V-50Hz), and Structural (Functional Groups using FTIR and Crystalinity using XRD) against Composite Bacterial Cellulose-Ectract of Gardenia augusta Leaves (CBC-EGAL) produced. The results showed the water content test,compressive strength test and the tensile strength test of CBC-EGAL are still belowed the minimum standard of articular cartilage. It was caused by least EDKP that goes into the matrix (SB).EGAL also could increase modulus young of BC. The result of XRD spectra and FTIR difractogram showed that BC and CBC-EGAL wasbelonging to cellulose type-I.

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Budhi Oktavia

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budhioktavia@fmipa.unp.ac.id

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Departemen Kimia, FMIPA, UNP Jalan Prof. Dr. Hamka, Air Tawar, Padang, Sumatera Barat

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Sumatera barat

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