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
jurnalrisetkimia@sci.unand.ac.id
Editorial Address
Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Andalas Kampus Universitas Andalas Limau Manih Padang 25163
Location
Kota padang,
Sumatera barat
INDONESIA
Jurnal Riset Kimia
Published by Universitas Andalas
ISSN : 1978628X     EISSN : 24768960     DOI : -
Core Subject : Science,
Chemistry
Arjuna Subject : -
Articles 505 Documents
 4   5   6   7   8 
UJI DAYA HAMBAT EKSTRAK RIMPANG SEGAR KUNYIT PUTIH (Curcuma zedoaria, Berg) TERHADAP PERTUMBUHAN KUMAN GRAM POSITIF DAN GRAM NEGATIF IN VITRO Bahar, Elizabeth
Jurnal Riset Kimia Vol 3, No 1 (2009): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i1.61

Abstract

 ABSTRACT Known as white turmeric crop of crop medicines anti cancer where this crop rimpang contain immeasurable chemical vitamin in the reality can pursue many of cancer cell. Though unegual germ cell its structure with cancer cell but process many of is same cell perform a replicace. Have been done/conducted by research of test sensitivity of extract of rimpang fresh of white turmeric in so many concentration 100%, 75%, 50% and 25% to growth of germ of Staphylococcus aureus, Salmonella typhii, Pseudomonas aeruginosa dan Escherichia coli of in vitro to know its sensitivity. Research of experiment by using factorial pattern in complete random device (RAL) with 5 restating. From result of research obtained by extract of rimpang fresh white tumeric in so many concentration not pursue growth of germ of Staphylococcus aureus, Salmonella typhi, Pseudomonas aeruginosa dan Escherichia coli. Its conclusion of extract of rimpang fresh of white turmeric non influence growth of Gram positive and Gram negative bacteria. Keywords: extract, fresh rimpang, white turmeric, germ
UJI AKTIVITAS ANTIMIKROBA SERTA ANTIOKSIDAN ASAP CAIR CANGKANG SAWIT (Elaeis gueneensis jack) -, Yefrida; -, Refilda; -, Indrawati; Siregar, Irma Yanti
Jurnal Riset Kimia Vol 4, No 2 (2011): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v4i2.135

Abstract

  ABSTRACT Liquid smoke is one of natural preservative. It can make from many sources such as coconut shell, wood, etc. In this study, it is made from the palm kernel shell (Elaeis gueneensis jack) by using pirolysis method. Its contains is determined by GC-MS, while antimicrobial activity by Kirby-Bauer method and antioxidant activity by DPPH method. From the test, it can be concluded that this liquid smoke contains carboxylic acids, fenol and its derivative compound as a major component and has a good enough antimicrobial and antioxydant activity. Keywords : liquid smoke, pirolysis, antimicrobial, antioxvdant.   
DEGRADASI MALACHITE GREEN OXALATE SECARA FOTOLISIS DAN OZONOLISIS DENGAN PENAMBAHAN ZnO-SnO2 Bhernama, Bhayu Gita; -, Syukri; -, Safni
Jurnal Riset Kimia Vol 7, No 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.169

Abstract

Vol 7 No 2ABSTRACTDegradation of malachite green oxalate (MGO) compounds has been carried out by ozonolysisand photolysis methods with addition of ZnO-SnO2 as catalyst. MGO solution was analyzed bya spectrophotometer UV/Vis at 250-650 nm. The results showed that ozonolysis process fasterthan photolysis. 6 mg/L MGO can be degraded as much as 97.3% after irradiated with UV light(369 nm) within 150 minutes with the addition of 0.020 g of ZnO-SnO2. Otherwise, 99.6% of 6mg/L MGO can be degraded by ozonolysis process within 5 minutes by the addition of 0.025 gof ZnO-SnO2. Analysis of the remaining MGO solution by reverse-phase HPLC showedintermediate-substances peaks and peak height of MGO at a retention time of 3.18 mindecreased as the data obtained using a UV/Vis spectrophotometer.Keywords: degradation, MGO, photolysis, ozonolysis, ZnO-SnO2
PEMANFAATAN PERLIT YANG TELAH DIMODIFIKASI UNTUK AMOBILISASI ENZIM BROMELAIN Mardiah, Elida
Jurnal Riset Kimia Vol 3, No 1 (2009): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i1.53

Abstract

 ABSTRACT Amobilization of bromelaine enzyme extracted from ananas fruit (Ananas comusus) acetone has been done. Modified perlite in the amino silica phosphat (ASP) is used as matrix amobilization.  The protein content has determined by Lowry method, while enzyme activity were determined by Anson method caseine as substrate. It native enzyme specific activity was 0.1281 unit/mg with konsentration 20000 ppm, pH 7.0, incubation time 35 minutes, and  temperature 40°C. Amobil bromelaine specific activity was 0.7438 units/mg with substrate on 20000 ppm pH 7.0, incubation time 30 minutes and temperature 37°C. This bromelaine enzymes activity was increased six times than native enzim and showed the activity for several repeatation. Keywords: perlit, enzim bromelain, amobilization
PRODUKSI GLUKOSA DARI BATANG KELAPA SAWIT MELALUI PROSES HIDROLISIS SECARA ENZIMATIS MENGGUNAKAN AMILASE TERMOSTABIL Marlida, Yetti; -, Mirzah; Arief, Syukri; Amru, Khoirul
Jurnal Riset Kimia Vol 7, No 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.190

Abstract

ABSTRACTThis study aimed to explore the optimization of the concentration of oil palm trunks andthermostable amylase enzyme preformance produce highest sugar (glucose total and reducingsugars) as well as the degree of polymerization. The design used in this study was a completelyrandomized design (CRD) factorial using 2 factors: factor A which consists of four levels ofamylase enzyme that A1: 250 units / kg, A2: 500 units / kg, A3: 750 units / kg and A4: 1000 units/ kg. Factor B is the concentration of oil palm trunk yitu B1: 20% (200 g / 1 liter) B2: 40% (400g / 1 liter) and B3: 60% (600 g / 1 liter) were repeated 3 times. The results showed that there is ahighly significant interaction (P <0.01) in the levels of amylase enzyme (factor A) with theconcentration of oil palm trunks (factor B) on reducing sugar, siqnificantly interaction (P <0.05)on total sugars and degree of polymerization (DP) . This research can be concluded that the besttreatment at a concentration of 60% oil palm trunks and levels 250 unit/kg of an enzymeconcentration that produces of total sugars 7.86 mg/ml, reducing sugar 15.69 mg /ml and degreeof polymerization 0.50Keywords : amilase, total gula, gula pereduksi, derajat polimerisasi.
PENGGUNAAN KATALIS ZnO-H2O2 UNTUK DEGRADASI ZAT WARNA RHODAMIN B DAN ALIZARIN-S -, Safni; Amelia, Fitrah; Liansari, Oktanora; Suyani, Hamzar; Yusuf, Yulizar
Jurnal Riset Kimia Vol 3, No 1 (2009): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v3i1.87

Abstract

 ABSTRACT The textile industry produce colored waste liquid that can contaminate the line water and its populations. A number of dyes are using in textile industry processes such as rhodamine-B and alizarine-S. Both of dyes are toxic for human life. In order to reduce the concentration that dyes is used the sonolysis method which have good efficiency and effective to degrade this pollutants. Sonolysis was performed using an ultrasound energy at 47 kHz. Catalyst ZnO is used to get better degradation. Rhodamine-B 2mg/L with 0.3 g ZnO addition, pH 5, temperature 40°C get 35.44% degradation after 60 minutes. If we used 3 mL H2O2 30% in the same condition the degradation up to 42.67% and with the combination of 0.3 g ZnO - 3 mL H2O2 as catalysts it got 91.99% after 90 minutes. Alizarine-S 20 mg/L with 0.5 g ZnO addition, pH 5, temperature 50°C was degraded up to 86.45% after 35 minutes. Furthermore, the degradation reached 95.79% if it used 0.5 g ZnO and 25 mL H2O2 30% at pH 5 and temperature 50°C after 35 minutes sonolysis. Keywords : rhodamine-B, alizarine-s, ZnO, H2O2
STRUCTURE CHARACTERIZATION OF FLAVONOID Aglycone FROM ETHYL ACETATE EXTRACT OF Rhodomyrtus tomentosa (AIT) HASSK Fahmi, Rizal; Manjang, Yunazar; -, Dachriyanus; Lajis, Nordin
Jurnal Riset Kimia Vol 4, No 2 (2011): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v4i2.127

Abstract

 ABSTRACT A flavonoid aglycone, 5-hydroxy-3,3’,4’,5’,7 pentamethoxy - flavone (Combretol), an antibacterial compound of ethyl acetate extract from the leaves of Rhodomyrtus tomentosa. The structure of this compound was established based on spectroscopic analyses and comparison with the related compound. The structure characterization of this compound will be discussed.  Keywords: Rhodomyrtus tomentosa, flavonoid aglycone, structure characterization 
PEMANFAATAN FUNGSI ANTI OKSIDAN GAMBIR (Uncaria gambir) SEBAGAI HEPATOPROTEKTOR Edward, Zulkarnain
Jurnal Riset Kimia Vol 2, No 2 (2009): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v2i2.163

Abstract

 ABSTRACT The aim of the research is to find out the effect of the hepatoprotector from gambier to some rats animal contaminated by carbon tetrachloride (CCl4). The research was done in Biochemistry laboratory Medical Faculty Andalas University Padang applied to 12 galur wistar rats species in about ± 2 months ages with 170-200 g weight, which are separated into 3 groups (clusters). They are cluster in negative control, in positive control (CCl4 2 mg/kgBB inductions), and treated cluster (CCl4  inductions and 10 mg/kgBB gambier given). Statistically analyzed the data by one way Anova test with 95% confidence of degree, the result of the research are pointed to the rate of MDA serum level which is 1.08 ± 0.12 nmol/mL for the cluster in negative control, 4.07 ± 0.45 nmol/mL for positive control cluster, and 3.28 ± 0.46 nmol/mL for treated cluster showed the significant differences between the 3 clusters. The rates of MDA lever level to the cluster in negative control is about 1.80 ± 0.30 nmol/mL, in positive control is about 4.55 ± 0.56 nmol/mL, and the treated cluster is about 3.92 ± 0.22 nmol/mL, from the 3 clusters above shows that there is only the positive control and the treated control has no meaning of purpose. It concluded that the CCl4  has the hepatotoxite effect with gambier could be functionated as the hepatoprotector. Key words : gambier, CCl4, hepatoprotector, MDA    
STUDI SERAPAN ION SENG(II) OLEH BIOMASSA MIKROALGA (Tetraselmis chuii) -, Bahrizal; -, Rahadian Z
Jurnal Riset Kimia Vol 2, No 2 (2009): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v2i2.146

Abstract

ABSTRACT In the present work, the process of zinc-ion adsorption by T. chuii biomass have been investigated. This investigation intend to determinate capacity of adsorption the biomass for zinc-ion in water. A weight of 100 mg biomass was put into 6 ppm of the metal-ion solution whose pH varied from 5.0 to 7.0. Then, these solutions were stirred for 30 minutes. After filtering, the metal-ion concentration in the filtrate was determined by atomic absorption spectrometry. The amount of ion adsorbed by the biomass was taken as the difference between the initial and final concentration of the solution. Further, the same method was carried out to the varied concentration. The result showed, the optimum pH for metal-ion adsorption by the biomass is 5.5, having adsorption value 1.106 mg/g. Capacity of zinc-ion adsorption was obtained by varied concentration, yielded value of 3.557 mg/g.   Keywords : T. chuii, biomass, adsorption, spectrometry   
　　　RUBRAXHANTONE DARI Garcinia forbesii KING. DAN BIOAKTIVITASNYA Alen, Yohannes; Safitri, Novi; -, Dachriyanus; Ali, A. Manaf; Ladjis, N. H.; Sargent, M. V.
Jurnal Riset Kimia Vol 1, No 2 (2008): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v1i2.76

Abstract

 ABSTRACT  The rubraxhantone compound was isolated firstly from antimicrobial fraction of the bark of Garcinia forbesii King. (Famili Guttiferae) by chromatographic method. The structure of this compound was elucidated based on its spectral data properties. The isolated compound had a significant antimicrobial properties against the selected microbes by diffusion method.  Keywords : antimicrobial, Garcinia forbesii King., chromatographic, diffusion   method.

Page 6 of 51 | Total Record : 505

 4   5   6   7   8 

Filter by Year

2007 2023


Reset
Filter By Issues
All Issue Vol. 14 No. 2 (2023): September Vol. 14 No. 1 (2023): March Vol. 13 No. 2 (2022): September Vol. 13 No. 1 (2022): March Vol 13, No 1 (2022): March Vol 12, No 2 (2021): September Vol. 12 No. 2 (2021): September Vol. 12 No. 1 (2021): March Vol 12, No 1 (2021): March Vol. 11 No. 2 (2020): September Vol 11, No 2 (2020): September Vol 11, No 1 (2020): March Vol. 11 No. 1 (2020): March Vol 10, No 2 (2019): September Vol. 10 No. 2 (2019): September Vol 10, No 1 (2019): March Vol. 10 No. 1 (2019): March Vol 10, No 1 (2019): March Vol. 9 No. 2 (2016): March Vol 9, No 2 (2016): March Vol. 9 No. 1 (2015): September Vol 9, No 1 (2015): September Vol 8, No 2 (2015): March Vol. 8 No. 2 (2015): March Vol 7, No 2 (2014): March Vol. 7 No. 2 (2014): March Vol. 5 No. 2 (2012): March Vol 5, No 2 (2012): March Vol 5, No 1 (2011): September Vol. 5 No. 1 (2011): September Vol 4, No 2 (2011): March Vol. 4 No. 2 (2011): March Vol. 4 No. 1 (2010): September Vol 4, No 1 (2010): September Vol. 3 No. 2 (2010): March Vol 3, No 2 (2010): March Vol 3, No 1 (2009): September Vol. 3 No. 1 (2009): September Vol. 2 No. 2 (2009): March Vol 2, No 2 (2009): March Vol 2, No 1 (2008): September Vol. 2 No. 1 (2008): September Vol. 1 No. 2 (2008): March Vol 1, No 2 (2008): March Vol 1, No 1 (2007): September Vol. 1 No. 1 (2007): September More Issue