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Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Andalas Kampus Universitas Andalas Limau Manih Padang 25163
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INDONESIA
Jurnal Riset Kimia
Published by Universitas Andalas
ISSN : 1978628X     EISSN : 24768960     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 554 Documents
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ISOLASI DAN KARAKTERISASI METABOLIT SEKUNDER DARI EKSTRAK ASETON DAUN MACARANGA PRUINOSA BANGKA BELITUNG Roanisca, Occa; Syah, Yana M.
Jurnal Riset Kimia Vol 9, No 2 (2016): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v9i2.248

Abstract

Macaranga is a large genus in Euphorbiaceae, locally known as "Mahang-mahangan", and consisting about 300 species. Distribution of Macaranga is widespread from Africa and Madagascar in the west to the tropical regions of Asia including Indonesia. Based on previous research of the M. pruinosa, secondary metabolites that have been reported are flavonoid, and stilbenoid derivatives from Borneo. M. pruinosa that grow in South Sumatra produce poilanoat acid (diterpene). Therefore, this research is done to investigate phytochemical constituent of leaves of M. pruinosa from Bangka Belitung Islands. Isolation is done by maceration in acetone, separation and purification using vacuum liquid chromatography and radial chromatography. Structure determination were elucidated by 1H-NMR,13C-NMR, 2D NMR. Two compounds are identified as flavanon derivatives. They are nymphaeol B, and 6-farnesil-3',4',5,7-tetrahidroksiflavanon. These compounds are substituted with terphenyl group, known as geranyl (C10), and farnesyl (C15). Nymphaeol B (1) and compound of 6-farnesil-3', 4', 5,7-tetrahidroksiflavanon (2) have been found in other species of Macaranga. In conclusion, we here acquired two phenolic derivatives substituted by terphenyl groups from acetone extracts of leaves of M. pruinosa from Bangka Belitung. They are nymphaeol B, and 6-farnesil-3',4',5,7-tetrahidroksiflavanon. The result showed that M.pruinosa can produce different secondary metabolites depend on where they grow. 
ISOLASI DAN ELUSIDASI STRUKTUR SENYAWA TRITERPENOID DARI KULIT BATANG AMBACANG (Mangifera foetida L.) SERTA UJI BRINE SHRIMP LETALITY TEST (BSLT) Santoni, Adlis; -, Sabariah; Efdi, Mai
Jurnal Riset Kimia Vol 9, No 1 (2015): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v9i1.252

Abstract

A brine shrimp toxic compound has been isolated from Mangifera foetida L. steam bark. Based on spectroscopic data (IR,1H- NMR, 13C-NMR 1D and 2D), the structure of this compound was identified as mangiferenes B, C30H47O2. In this study, the n-hexane, ethyl acetate, methanol extracts and isolated compound showed toxic effects (LC50 471.9543; 534.5209, 678.4421, and 22.1615 μg/mL, respectively). The toxicity degree among the three extracts and isolated compound is isolated compound > n-hexane extract > ethyl acetate extract > methanol extract.
STUDI OPTIMASI PENENTUAN UNSUR HARA BESI DALAM CAMPURAN TANAH DAN KOMPOS MENGGUNAKAN METODE SPEKTROFOTOMETRI -, Refilda; -, Suhartini; -, Indrawati
Jurnal Riset Kimia Vol 8, No 2 (2015): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v8i2.231

Abstract

Determination of iron nutrient content in a mixture of soil and compost with spectrophotometric method has been carried out. Metal ions Fe(II) complexed with 0.1% ortho-fenantrolin 2 mL, 0.01 M citric acid as reducing  agent  using acetat buffer at pH 4.5 and its complex was measured by using spectrophotometer UV/Vis at wavelength 515 nm, the complex stability for was 60 minutes . The highest nutrient of iron with content in soil:compost with ratio of 0.8:0.2 was 0.92% at incubation time 30 days. The lowest iron content in the mixture of soil:compost (1:0) at incubation time for  15 days was 0.58% that obtained by the regression equation y = 95.85x + 0.025 with R2=0.992. The level of nutrient iron in compost obtained lower than the maximum regulated by SNI 2.00%.
PEMBUATAN DAN KARAKTERISASI KATALIS TIO2/KARBON AKTIF DENGAN METODE SOLID STATE Septiani, Upita; Gustiana, Mega; -, Safni
Jurnal Riset Kimia Vol 9, No 1 (2015): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v9i1.257

Abstract

Composite catalyst of TiO2/Activated Carbon (TiO2/AC) had been synthesized with successfully by solid-state method. Synthesis was done by varying the addition of AC 5%, 10% and 15% of the mass of TiO2 was used. Composite catalyst was calcinated at temperature 400°C and characterized by Fourier Transform Infra-Red (FTIR), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). FTIR spectrum show that the absorption appearedin the regionof C=C at wave number 1600-1800 cm-1, that assumed from AC. From XRD we can see that with variated of AC do not given different XRD patterns significantly, crystal structure of composite catalyst is anatase. SEM images showed that AC prevented the aglomeration of TiO2 that would expand surface area and increased catalytic activity of TiO2.
VALIDASI METODA FRAP MODIFIKASI PADA PENENTUAN KANDUNGAN ANTIOKSIDAN TOTAL DALAM SAMPEL MANGGA DAN RAMBUTAN -, Yefrida; Ashikin, Nor; -, Refilda
Jurnal Riset Kimia Vol 8, No 2 (2015): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v8i2.236

Abstract

Validation of modified FRAP method to determine total antioxidant content in mango and rambutan sample have been done. Total antioxidan content in sampel is presented as Gallic Acid Equivalent (GAE). Modified FRAP method using FeCl3asoxidizing agent and ortho-phenantroline as complexan, which produce complex compounds of [Fe (C12H8N2)3]+2 sorrel coloured. Validation parameters are obtained in this research are r = 0.999, R2 = 0.998, LoD 3.13 x 10-6 M and LoQ 1.04 x 10-5 M. While RSD and recovery in the sample mango and rambutan were 1.15%, 1.34% and 96.31%, 97.72%, respectively. Based on the value of the validation parameters, it can be concluded that this method can be used for determination of total antioxidant content in the mango and rambutan samples.
DEGRADASI SENYAWA IMIDAKLOPRID SECARA ADVANCED OXIDATION PROCESSES DENGAN PENAMBAHAN TIO2-ANATASE Amelia, Fitrah; -, Safni; Suyani, Hamzar
Jurnal Riset Kimia Vol 8, No 2 (2015): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v8i2.225

Abstract

Imidacloprid is active compounds in Confidor 200 SL with  have toxical character. Degradation of Imidacloprid in Advanced Oxidation Processes (AOPs) method by using TiO2 catalyst can reduce toxic level. Advanced Oxidation Processes (AOPs) method which is used is Sonolysis, Photolysis, and Ozonolisis. The result of sonolysis, Photolysis, and Ozonolysis measured by spectrophotometer UV-Vis with λ 400-600 nm, and than optimum degradation waste after addition of catalys measured by HPLC. The result of degradation of Imidacloprid 6 mg/L using sonolysis without addition catalys is more smallest from addition catalys which degradated in 60 minute, temperature 25±1 °C. At the same time with Photolysis methode for addition catalys we get the degradation is more biggest from addition catalys. Degradation percentage of imidacloprid without addition of TiO2-anatase reach is small from with addition of TiO2. Measure using HPLC for each methode we get more than one peak in chromatogram. It means there are other coumpounds in imidacloprid solution.
PROSES ULTRAFILTRASI UNTUK PENJERNIHAN SARI BUAH MARKISA (Passiflora quadrangularis) DENGAN MEMANFAATKAN MEMBRAN KERAMIK -, Refinel; Tetra, Olly Norita; Usmita, Roza Melia
Jurnal Riset Kimia Vol 9, No 2 (2016): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v9i2.285

Abstract

Ultrafiltration of passion fruit juice using variation thickness of ceramic membrane has been done.  The result shows that aquades flux value in 25 minutes for membrane 1.5; 2.0; 2.5; 3.0; and 3.5 mm is 17.0135; 19.1947; 10.9061; 10.9061 and 4.3624 L/h m2. Whereas passion fruit juice in same time for membrane 1.5; 2.0; 2.5 mm is 8.2886; 5.6712 and 4.3624 L/h m2. For membrane 3.0 and 3.5 mm it has not been done because flux value are too small that indicate fouling. Physical and chemical properties parameter in ultrafiltration of passion fruit juice obtained for turbidity and color very different between passion fruit juice before and after ultrafiltration, whereas reducing sugar and vitamin C are not significant different between passion fruit juice before and after ultrafiltration. Determination rejection coefficient value of membrane for turbidity, color  relatively significant whereas for reducing sugar and vitamin C are relatively not significant.
SINTESIS DAN KARAKTERISASI NUKLEOTIDA BERTANDA [α-32P]ATP Rahman, Wira Yusril; Sarmini, Endang; Herlina, H.; Abidin, A.; Triyanto, T.; Hambali, H.; Nurbaiti, Santi
Jurnal Riset Kimia Vol 10, No 1 (2019): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i2.319

Abstract

The utilization of nuclear technology in health sector with molecular techniques is increasingly developed today, especially in Indonesia.  One of which is nucleotide compound marked with [α-32P]ATP, this compound has been used as tracer for deoxyribonucleic acid (DNA)/ ribonucleic acid (RNA) in the study of various physiological and pathological processes. [α-32P]ATP is synthesized through several stages of continuous reaction in one reaction vessel. It begins with synthesis of [γ-32P]ATP through an enzymatic reaction, using H332PO4 and ADP, and enzymes  of lactate dehydrogenase, 3-phosphoglycerate phosphokinase and glyceraldehide 3-phospho  dehydrogenase; followed by phosphorilation of 3’AMP with T4 polinucleotide kinase enzyme to produce 3’-[5’-32P]ATP. The result is hydrolyzed with nuclease P1 enzyme to produce [5’-32P]AMP. The unreacted [γ-32P] is degraded by the addition of hexokinase enzyme and glucose. At the final stage of the reaction, the [5’-32P]AMP is  phosphorilated using phosphoenol-piruvat, piruvat kinase, and myokinase to produce [α-32P]ATP. The test results show that the every stage of reaction is characterized using TLC method, PEI cellulose paper as stationary phase and KH3PO4 0,5 M pH 3,5 as mobile phase. At the end of reaction, the yield of [α-32P]ATP reaches 71,7%, at Rf = 0,2.
PENJERNIHAN AIR SUMUR MENUJU AIR LAYAK MINUM DENGAN METODA LAPISAN MULTI MEDIA ( LMM ) Swesty, Neneng; Zein, Rahmiana; Zilfa, Z.
Jurnal Riset Kimia Vol 10, No 1 (2019): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i2.297

Abstract

The Multi Soil layering (MSL) system is a liquid waste treatment method with the use of soil as the main medium and the organic material formed in brick and arranged in layers with a homogeneous zeolite layer. The MSL system is made of acrylic (50 x 15 x 50) cm containing a brick (4 x 9 x 15) cm and (4 x 5 x 15) cm of volcanic soil mixture as the main medium mixed with charcoal, rice husk, and iron powder (70 : 10 : 10 : 5)%, permiable layer is used zeolite (2-3) mm. The sample came from the well water of one of villager at Jati, Padang. Efficiency of SML system for aeration process on turbidity parameter with flow rate variation of 2, 4, 6, 8 mL/min reach 99,8 %, for non aeration process efficiency of turbidity decrease 88,14 %. While for the flow rate of 10, 20, 40, 80 mL/min, the efficiency of decrease for aeration at parameters Mn 66,44 %, nitrite 59,74 %, nitrate 58,34 %, turbidity 54,63 %, while in non aeration efficiency decrease turbidity reach 44,04 %, Mn 47,26 %, nitrite 49,74 %, nitrate 45,57 %. Of all efficiency values decreasing all parameters already complied drinking water quality standard according to Permenkes RI No. 492/Menkes/Per/IV/2010.
ISOLASI SENYAWA TRITERPENOID DAN UJI ANTIBAKTERI EKSTRAK n-HEKSAN DAUN KAYU ARA (Ficus aurata (Miq.) Miq) Santoni, Adlis; Efdi, Mai; Bumali, Restu
Jurnal Riset Kimia Vol 10, No 1 (2019): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i2.268

Abstract

Triterpenoid isolation from n-hexane extract of kayu ara leaves (Ficus aurata (Miq.) Miq) has been performed. The Isolation has been done by column chromatography method using silica gel as a stationary phase and n-hexane and ethyl acetate as mobile phase with isocratic method and it is continued by trituration method. Isolated compound has white amorphous shape, decomposed at 86-87ºC and gives single spot with reddish brown violet in LB reagent and in H2SO4 reagent on TLC test. UV spectra indicate the presence of double bonds in the isolated compound at 204 nm λmax and IR spectra showed -OH functional group at 3290 cm-1, -CH stretching at 2912,90 cm-1, C=C at 1676 cm-1, C-O stretching at 1054,93 cm-1, and at 1374 cm-1 is spectra of geminal dimethyl compound that are characteristic of triterpenoids which supports ultraviolet spectroscopic data. Antibacterial activity test showed that isolated compound is active in inhibiting the growth of gram-positive bacteria Staphyloccocus aureus and gram-negative bacteria Escherichia coli.

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