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Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam
Published by Universitas Riau
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Articles 424 Documents
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PEMANFAATAN KIAMBANG (Salvinia molesta D. Mitch) UNTUK FITOREMEDIASI LIMBAH ORGANIK PULP DAN KARATS Iwan Simatupang; Siti Fatonah; Dyah Iriani
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

"> Paper industry produce water wastethat contain organic and inorganic compounds. The efforts to control the pollution caused by waste is carried out using phytoremediationsuch as the use of Salvinia molesta(kiambang). The purpose of this research was to improve the quality of water in liquid organic water and paper pulp. The study used a completely randomized design (CRD) with five dilution treatment 25%, 50%, 75% and 100% and control (0%) for 15 days. Data were analyzed using ANOVA and followed by DMRT at 5% level. The results showedthat kiambang grown on paper and pulp wastecould improve the quality of waste at 25%concentrations, withincreasing DO content from 5 ppm to 16 ppmabove DO content of nomal water. Kiambang plant could absorb organic compounds and improved the value of DO while BOD, COD and TSS didn’t reach the water quality standard yet for all treatments. Howerver, for 25% and 50% consentration gave a closer result to the water quality standard.
INDUKSI AKAR JERUK SIAM ASAL KAMPAR (Citrus nobilis Lour.) DARI TUNAS IN VITRO DENGAN BERBAGAI KOMBINASI SUKROSA DAN NAA PADA MEDIA ½ MURASHIGE AND SKOOG Indah Wijayanti; Mayta Novaliza Isda; Wahyu Lestari
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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> Citrus (Citrus nobilis Lour.) from Kampar is one of primary commodity from Riau Province. In order to conserve citrus from Kampar as a main fruit from Riau, it is necessary to carry out seedling multiplication using in vitro method. The purpose of the study was to determine the best concentration of sucrose and NAA as well as to determine their interaction in inducing citrus root on ½ MS media. This research used Randomized Block Design (RBD) factorial with two factors, i.e. the concentration of sucrose (1, 2, 3 and 4%) and NAA (0, 0,5, 1 and 1 ,5 mg/l). The concentration of 1 and 2% sucrose produced the highest number of root (1,17 units), 2% sucrose could give the fastest root induction (17,6 days) and also produced the longest root (2,57 cm). The combination of 1% sucrose + 1 mg/l NAA could give the fastest root induction (11,5 days), while the combination of 3% sucrose + 0,5 mg/l NAA produced the longest root (2,31 cm) and 3% sucrose + 1,5 mg/l NAA produced the highest number of root (1,64 units).
ANALISIS HUBUNGAN KEKERABATAN CEMPEDAK (Artocarpus champaden Lour.) BERDASARKAN PENANDA MORFOLOGI DI KABUPATEN KAMPAR PROVINSI RIAU Via Andani; Fitmawati '; Nery Sofiyanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Kampar is one of the regency in Riau Province that has high diversity of cempedak (Artocarpus champaden Lour.). The diversity of cempedak in Kampar have not been reported, researched and characterized morphologically. This research was aimed to analyze the diversity of cempedak cultivars from various regions. This study had been conducted from September to Desember 2013, using exploration method. A total of 51 morphological characters from 30 individuals were observed and scored and then analyzed using NTSYSpc 2.02 and Minitab 16.0. Four cempedak cultivars identified in this study were Bubur (6 individuals), Hutan (14 individuals), Langkat (5 individuals), and Nangkadak (5 individuals). The coeffisien similarity were range from 0.23 to 0.72. The dendogram shows two main group, first group consist of 29 individuals, such as Bubur (5 individuals), Hutan (14 individuals), Langkat (5 individuals) and Nangkadak (5 individuals); the second group consisted of 1 individu (Bubur cultivar). Main group analysis showed that plant clustered is not based on the origin. Furthermore pearsoncorrelation analysis on 51 characters showed that there are positive correlations between 40 characters, and negative correlations between 6 characters.
UJI POTENSI ANTIFUNGI AKTINOMISETES SELULOLITIK DAN LIGNINOLITIK DAN BAKTERI LIGNOSELULOLITIK ISOLAT LOKAL TERHADAP PERTUMBUHAN JAMUR Ganoderma boninense DAN Colletotrichum capsici Dede Martin; Atria Martina; Rodesia Mustika Roza
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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Colletotrichum capsici fungi, causing agent of anthracnose in chili, and Ganoderma boninense, fungi causing agent of basal stem rotten in oil palm, can reduce the productivity of chili and oil palm. These disease are increasing so that it is necessary to find local biological agents that are environmentally friendly. The purpose of this research was to determine the potential isolates of lignocellulolyltic bacteria and cellulolytic and ligninolytic actinomycetes from peat soil of Rimbo Panjang Kampar, Riau as an antifungal agent to inhibit the growth of C. capsici and G. boninense.Antifungal activity was screened using agar disc method by measured the inhibition zone for seven days. The results showed that 13 isolates of actinomycetes haveantifungal activity against C. capsici with the highest inhibition zone 13,3 mm by RB2S40. Six isolates of actinomycetes have antifungal activity against G. boninense with the highest inhibition zone 29,15 mm by RB1S4. Five isolates have the ability to inhibit both fungi which were targeted.
SURVIVAL RATE DAN TOTAL AKUMULASI BIOMASSA PERMUKAAN DARI LIMA JENIS POHON YANG DIGUNAKAN DALAM EKSPERIMEN RESTORASI PADA LAHAN GAMBUT BEKAS TERBAKAR DI AREA TRANSISI CAGAR BIOSFER GIAM SIAK KECIL-BUKIT BATU DESA TANJUNG LEBAN, BENGKALIS, RIAU Dian Indriani; Haris Gunawan; Nery Sofiyanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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Abstract

Biosphere Giam Siak Kecil-Bukit Batu reserve was based on managed zonations as a multi-benefit management approach. This region has a fairly large carbon stocks stored in its natural peat swamp forest ecosystems. How ever the general condition of the peat swamp forest in the landscape Biosphere Giam Siak Kecil-Bukit Batu currently has suffered damage, especially in the buffer and transition zones. The threat to the existenceof protected areas are not only coming from forest fires factors alone, but also from encroachment and illegal logging. Therefore, is requires a recovery effort. This research aims to determine the survival rate and to estimate above ground biomass accumulation of the main tree species of peat swamp forest which was used to restore the burnt-peat. Estimate total biomass accumulation on the surface using allometric equations. Result of this research prove that the type of Jelutung (Dyera polyphylla) has the best survival rate among the values of other types (98%), while the species Pisang-pisang (Mezzettia parviflora) have a survival rate of 35%. Total above ground biomass accumulation on thehighest level found in Jelutung (Dyera polyphylla) it was 499.015 kg/ha/year, while the lowest total above ground biomass accumulation found in Meranti batu (Shorea uliginosa) 88.867 kg/ha/year.
RANCANG BANGUN ALAT PENJERNIH AIR YANG TERCEMAR LOGAM BERAT Fe, Cu, Zn DALAM SKALA LABORATORIUMRANCANG BANGUN ALAT PENJERNIH AIR YANG TERCEMAR LOGAM BERAT Fe, Cu, Zn DALAM SKALA LABORATORIUM Andi Syahputra; Sugianto '; Riad Syech
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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A research on design and construction of purification equipment of water contaminated by heavy metals Fe, Cu, and Zn was carried out. The equipment was utilized to purify water sample of Siak River at a distance of 1m from the PT. RICRY of rubber industry in Pekanbaru. Analysis was performed by using Atomic Absorption Spectrophotometer (AAS). The analysis results showed that the concentration of Cu, Fe and Zn before filtration process sequentially were 0.3809 ppm, 0.0051 ppm, and -0.0012 ppm. After being filtered twice showed an absorption percentage for type I sieve (with carbon) on the heavy metals sequentially were Fe 75%, Zn 14.29% and Cu 10.78%. Sieve type II (without carbon) absorption percentage of each heavy metal were Fe 59.5%, Zn 7.75%, and Cu 0.0%, while the water discharge at the sieve type I (with carbon) obtained an average water discharge of 0.164 645 x 10-2 m3/s, and the sieve type II (without carbon) of 0.17838 x 10-2 m3/s. Based on the result the sieve type I with carbon has a better result for water purification treatment.
KEBOLEHULANGAN (REPRODUCIBILITY) DALAM PEMBUATAN SEL SUPERKAPASITOR DARI KAYU KARET Rizki, Afdhal; Taer, Erman; ', Rika
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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A research has been conducted on reproducibility measurement of specific capacitance of supercapacitor cell. The purpose of this study was to measure reproducibility capacitive properties of supercapacitor cell based on rubber wood electrode. Synthesis of supercapacitor cell was started by producing electrode with carbonization process in vacuum flowing N2 gas at a temperature of 7000 C and through physical activation using CO2 gas with a temperature of 900° C for 2 hours. Specific capacitance of the cell was measured using cyclic voltammogram at scan rate of 1 mV/s – 100 mV/s for three different cells. The highest specific capacitance of 78.692 F/g with 3.274 % error percentage to be found at 1 mV/s of scan rate while the highest error percentage was observed at 16.785 % for 100 mV/s. Scanning Electron Microscope micrograph from the top and side view with magnification of 500 and 3000 X showed a pore in the form of a tunnel straight down on the samples. X-Ray Difraction measurement showed the peaks of carbon electrode occurred at 2θ of 24,442o - 44.101 o due to the presence of carbon with their crystal orientation of (002) and (100). The overall results showed the measurement of specific capacitance of supercapacitor cell was found to be accepted with low standard deviation (< 5 %) especially for measurement of 1 – 50 mV/s in scan rate.
VARIASI BERAT KATALIS DAN SUHU REAKSI TRANSESTERIFIKASI CRUDE PALM OIL MENGGUNAKAN KATALIS CANGKANG KERANG DARAH KALSINASI 800 OC Muhammad Reza Pahlevi; Nurhayati &#039;; Sofia Anita
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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"> Biodiesel is one of the alternative fuels derived from petroleum. Compared to diesel fuel, it is renewable, biodegradable, and environmentally friendly. Biodiesel can be synthesized in two steps, that are esterification and transesterification stages. In this study, biodisel was synthesized from CPO through esterification using concentrated H2SO4 as catalyst, and transesterification using CaO catalyst from Anadara granosa shell waste. This catalyst was calcined at 800 oC for 10 hours. The surface area measurement of CaO catalyst derived blood clam shell was using methylene blue adsorption method and was obtained 17.3742 m2/g. The biodisel was synthesised with various of catalyst weight and reaction temperature. The result of biodiesel was obtained 76.40% with 4% CaO catalyst weight for 3 hours at ratio mol oil methanol 1:12 and reaction temperature at 65±2 °C.
HUBUNGAN AKTIVITAS ENZIM DAN KONSENTRASI SUBSTRAT PADA POLA DETEKSI SECARA HPLC HASIL TRANSGLIKOSILASI NARINGENIN OLEH ENZIM SELULASE Penicillium sp. LBKURCC27 Puspita Sari; Titania Tjandrawati Nugroho; Andi Dahliaty
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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Transglycosylation of naringenin was carried out by concentrated cellulase enzyme of Penicillium sp. LBKURCC27. Enzymatic transglycosylation of naringenin was successfully carried out by cellulase from Penicillium sp. LBKURCC27, however the reproducibility of the reaction is low, making detection by reverse phase HPLC (High Performance Liquid Chromatography) difficult when the enzyme activity decreases. It is believe that the flavonoid concentration used in the transglycosylation naringenin by cellulase Penicillium sp. LBKURCC27 influences the detection pattern of transglycosylation product of HPLC. The reaction was carried out for 30 hours at 40°C with acetate buffer 0.05 M pH 5.5 and 170 rpm shaking. Carboxymethyl Cellulose (CMC) was used as glycosyl donor. Results of HPLC analysis showed that cellulase Penicillium sp. LBKURCC27 with an activity of (0.670±0.023 U/mL) were not able to convert naringenin to a detectable glycosylated product when the initial substrate concentration was 6 mg/mL. In the 0.6 mg/mL of naringenin concentration, the glycosylation product was formed with 100% of percent convertion.
OPTIMALISASI pH PRODUKSI ENZIM SELULASE DARI BAKTERI ENDOFITIK Pseudomonas stutzeri LBKURCC45, Pseudomonas cepacia LBKURCC48 DAN Pseudomonas stutzeri LBKURCC59 Ajaib Prima; Silvera Devi; Saryono &#039;
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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The isolate of LBKURCC45, LBKURCC48 and LBKURCC59 are endophytic bacteria that have been isolated from the tubers of dahlia. Endophytic bacteria can get into the plant tissue through injured plant tissue or because the bacteria can produce cellulase to degrade plant cell wall that contain cellulose. Cellulase is an enzyme that can hydrolyze the β-1-4-glycosidic bond of cellulose. This study was carried out to determine the optimum pH of cellulase enzyme production (6.0; 6.5; 7.0; 7.5; and 8.0). Enzyme activity was calculated based on the amount of reducing sugar formed from Carboxymethyl cellulose (CMC) substrate hydrolyzed by cellulase enzyme with Nelson-somogyi method. The result showed that the highest activity of cellulase enzyme obtained at pH 7 at 24 hours production time. The cellulase activity of LBKURCC45, LBKURCC48, and LBKURCC59 was 0.415 ± 0.043 x 10-3 U/mL, 0.353 ± 0.069 x 10-3 U/mL, and 0.246 ± 0.050 x 10-3 U/mL, respectively.

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