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AKTIVITAS ANTIBAKTERI EKSTRAK DAUN Cyclea barbata (L.)Miers. TERHADAP BAKTERI Escherichia coli DAN Salmonella typhi Arifan Asmardi; Rodesia Mustika Roza; Fitmawati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Indonesia has many medicinal plant species that are distributed in many regions. Green grass jelly (Cyclea barbata (L.) Miers.)is one of medicinal plant that used in traditional medicine by Indonesian people. This species used to treat inflammation, fever and others. The main content of green grass jelly are saponins, flavonoids and alkaloids. Escherichia coli and Salmonella typhi can infect the human body, but the green grass jelly can inhibit the growth of these bacteria. This study was performed using four methods, maceration, fresh leaf grinding, fresh and dried leave boiling, the dilution series (10%, 25%, 50%, 75% and 100%) were applied for each method. The best result among four methods was the maceration method with 100% concentration dilution. The treatment using E. coli showed the widest diameter of inhibition zone was 17.23 mm and the lowest diameter was 7,70 mm. while the treatment using S. typhi showed the widest diameter was 15.89 mm and the lowest diameter was 6,85 mm. The higher the concentrations used, the wider the inhibition zone diameter was.

PENAKSIRAN POPULASI TAPIR ASIA (Tapirus indicus) DI SUAKA MARGASATWA RIMBANG BALING DENGAN BANTUAN KAMERA JEBAK Nuri Asmita; Ahmad Muhammad; Sunarto '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The island of Sumatra harbors a few large ungulates, including the endangered Asian tapir, Tapirus indicus, whose population is believed dwindling due to habitat loss and fragmentations. Recent surveys indicated that the species occurs in a wide range of habitats which are strongly affiliated to natural forests. In Riau Province, Rimbang-Baling Wildlife Reserve is one of the remaining pockets of tapir population. We have conducted a preliminary assessment of tapir population in this reserve using camera traps. We operated 20 camera-traps in 20 systematically grids. From 1,710 effective trap nights, 304 images of tapir with 71 independent images were obtained, which were identified as 14 individuals. Based on the best models developed in DENSITY Program Version 4.4, we estimated that there were 7.60 ± 2.40 (D±SE)tapir individuals/100 km2 in the surveyed area. Our study provided the first density estimate of this endangered speciesin Sumatra using Spatial Explicit Capture-Recapture method. The findings indicate that Rimbang Baling is an important area that should be protected more effectively if the Asian tapirs want to be conserved for the long term.

APLIKASI MIKROORGANISME LIGNOSELULOLITIK INDIGENUS ASAL TANAH GAMBUT RIAU DALAM PEMBUATAN KOMPOS DARI LIMBAH TANDAN KOSONG KELAPA SAWIT (Elaeis guineensis Jacq.) Jannah, Wirdatul; Delita Zul, Delita Zul; Fibriarti, Bernadeta Leni
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Palm oil industries usually produce side result such as empty fruit bunch (EFB) wastes. This waste can be employed as a substrate for making compost. Naturally, EFB takes a long time to produce standardized compost as its contains lignin and cellulose components. The purpose of this research was to analyze the ability of indigenous lignocellulolytic microorganisms isolated from peat soil in Riau as the bioactivator. The selected isolates consisting of 4 bacteria (BB_S27, BB_HP42, BB_HP41 and BB_K20) and 2 fungi (LIJ1 and L1J2) were subcultured on Nutrient Broth and Potato Dextrose Broth. Starters were then prepared from a combination of those isolates resulting three types of starter, namely starter I (4 isolates bacteria), starter II (4 isolates bacteria and 1 isolates fungi), starter III (4 isolates bacteria and 2 isolates fungi). As positive controls, starter IV (EM4) and starter V (bioactivator made in USA) were utilized. Starters were prepared by fermentation process during 7 days using seedling media. Composting was done by the windrow composting system utilizing 500 kg EFB as a substrate and inoculated by 50 liters of the starters at the 1st and 7th incubation time. During 35 days composting process, the substrate was enriched by water every 2 days. The best quality compost was produced by K3 treatment (a combination of 4 bacteria) as its characters almost in line with the National Quality Standard (ISO) such as N 1.57%, C/N ratio 23.89, P 0.38%, K 1.61%, blackish brown color, soil smell, unraveled texture, and the highest cell number of bacteria, fungi, and celullolytic microorganisms were with value 1.38x1012 CFU/g, 2.08x107 CFU/g dan 1.35x108 CFU/g, respectively.

STRUKTUR GINJAL IKAN SELAIS (OmpokhypopthalmusBleeker, 1846) DI PERAIRAN SUNGAI SIAK KOTA PEKANBARU Wagiman '; Yusfiati '; Roza Elvyra
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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This study aims to find out histological condition of kidney tissue of selais fish (Ompok hypophthalmus) from Siak river. Kidney samples of the fish were collected from two stations, namely Siak I Bridge in Okura Village, District Rumbai Pesisir and Siak II Bridge Tampan Village, District Payung Sekaki. Histological slides with 6 μm thickness of the kidney samples of selais fish were made using paraffin method and stained with Hematoxylin-Eosin (HE). The kidney tissue of selais fish showed damages such as swelling of the glomerulus (12%), swelling of proximalis tubules cells (9.6%), swelling of loop of henle cells (6.5%), swelling of distal tubules cells (10.7%), swelling of macula densa cells (15.8%), a fatty of proximalis tubules cells (9.7%), a fatty of loop of henle cells (3.5%), a fatty of distal tubules cells (11.6%), congestion (6.15%) and necrosis (2.7%). Kidney tissue damages of selais fish occurred were allegedly affected by the heavy metal presence in the water of the Siak river.

STUDI ETNOBOTANI FAMILI ZINGIBERACEAE DALAM KEHIDUPAN MASYARAKAT LOKAL DI KECAMATAN SIAK HULU KABUPATEN KAMPAR Annisa Auliani; Fitmawati '; Nery Sofiyanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The local people from Siak Hulu, Kampar have traditional knowledge about the use of plant for medicinal purposes. One of plant family mainly used for medicinal plant is Zingiberaceae. This research aimed to investigate the use of Zingiberaceae for traditional medicine in Siak Hulu, Kampar. This research had been carried out from June 2012 toDecember 2013. A total of four study sites were selected. The herbarium and plant identification were prepared in the Laboratory of Botany, Department of Biology, Facultyof Mathematic and Natural Sciences. The result showed that 10 Zingiberaceae species used by local people in Siak Hulu for traditional medicine were Curcuma Domestica, Zingiberofficinale, Kaemferia galanga, Alpinia galanga, Zingiber cassumunar, Zingiber Americans, Alpinia zerumbet, Alpinia conchigera, Zingiber officinale var. rubrum. All of the specieswere herb type. It was also found that the common way in using the medicinal plant was by being pounded.

ANALISIS ISI LAMBUNG IKAN LAIS JANGGUT (Kryptopterus limpok, Bleeker 1852) DI SUNGAI TAPUNG HILIR PROPINSI RIAU Ravki Adiyanda; Roza elvyra; Yusfiati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Research on the analysis of stomach content of Lais janggut fish (Kryptopterus limpok, Bleeker 1852) from Tapung River was conducted from December 2012 to February 2013. Fish samples had been taken from the Tapung Hilir river which was divided into three stations: Salembakan Palas, Flamboyan, and Kota Garo. The purposes of this study were to determine the types of food of Lais janggut fish covering the main food, food supplements and additional food at the three stations. The analysis used was the index of preponderance. The index of preponderance was used to analyze the stomach content. It was indicated that the main food and food supplements of Lais janggut fish in Salembakan Palas station consist of Puntius sp (89.3%) and litter (1.1%), arthropods (1.2%), animal debris (8.2%). The Lais janggut fish from Flamboyan station has main food of Puntius sp (84.1%), food supplements in the form of litter (4.5%) and animal debris (8.2%) and additional food such as arthropods (3.2%). Furthermore Lais janggut fish from Kota Garo station has main food debris in the form of animals (45%) and Puntius sp (43.9%), supplementary food such as fish Puntius sp (37%) and food supplements in the form of litter (6.0%) and Arthropods (4.7%). The main food, food supplements, and additional food of Janggut lais fis in Tapung Hilir river were Puntius sp, litter, animal debris, and arthropods respectively.

ANALISIS ISI LAMBUNG IKAN LAIS PANJANG LAMPUNG (Kryptopterus apogon) DI DESA MENTULIK SUNGAI KAMPAR KIRI DAN DESA KOTA GARO SUNGAI TAPUNG PROVINSI RIAU Meliawati '; Roza Elvyra; Yusfiati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The study on stomach content of lais panjang lampung fish (Kryptopterus apogon) in Mentulik village of Kampar Kiri River and Kota Garo village of Tapung River was conducted from October 2013 to March 2014. This study aimed to observe the stomach content of lais fish which were categorized into main food, supplement food, and additional food, as well as to determine the ratio of the length of gut toward total body length. The method used in this study was a survey method. The analysis indicated that the food which had the highest value in index of preponderance in both stations based on the type of food and sex was those of animal debris. Furthermore, analysis on the ratio of the length of gut towards the total body length showed that the length of gut never exceed the total body length. Based on the analysis of index of preponderance and the ratio of the length of gut towards the total body length, lais panjang lampung fish (K. apogon) was considered carnivorous.

PENENTUAN TINGKAT KEBISINGAN SEPEDA MOTOR KNALPOT STANDAR DAN MODIFIKASI Nasib '; Erwin '; Juandi M
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The noise level produced by standard and modified motorcycles exhaust has been investigated. In this research, there were three types of motorcycles used namely Honda, Suzuki and Yamaha. Noise levels that generated by those motorcycles were measured using Sound Level Meter (SLM) SL 4112. In order to eliminate noise from other sources 5 different angles (0o, 45o, 90o, 135o, and 180o) were used, then the measurement of noise from the motorcycles exhaust was done 2m from the exhaust. The results of the measurement showed that sound intensity generated by standard motorcycle exhaust at angle of 90o produced maximum value of 78,17 dB, 79,62 dB and 97,55 dB for Honda, Suzuki and Yamaha respectively. By modifiying the exhaust, the noise level produced of Honda, Suzuki and Yamaha were 97,48 dB, 97,62 dB and 97,55 dB respectively. The significant increase of noise level for modified exhaust with muffler was caused by several factors such as muffler and diameter of exhaust. The range value of noise level for the standard exhaust was measured at the angle of 90oand the engine variation of 5000 rpm was 78,66 dB while for the modified exhaust produced an average value of 97,55 dB with the same position and engine variation.

PRODUKSI SERASAH BERDASARKAN ZONASI DI KAWASAN MANGROVE BANDAR BAKAU, DUMAI-RIAU Ruth Herlina Sitompul; Khairijon '; Siti Fatonah
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Mangrove is flora that grows in coastal area and it has high tolerance on salinity. Mangrove plays an important role in nutrient cycle because it produces nutrient for surrounding ecosystem. Riau province has wide mangrove forest located in Dumai city, Bandar Bakau. The aim of the research was to determine the amount of its litter production. There were three zones in this research, namely Upper Zone, Middle Zone and Lower Zone. A total of 10 litter traps (1x1 m2) were placed in each zone using a purposive sampling method. The litter was analyzed in the Laboratory Ecology of Biology Department. Results showed that highest total litter production for threemonths (1091.02 g/m2/month) was found in the Middle Zone. In March, litter production (619.62 g/m2/month) was higher than the others. The data showed that the litter production had a positive correlation with humidity and rainfall in the three zones. A significant value was found in the Lower Zone between litter production and salinity.

PENUMBUHAN DAN KARAKTERISASI NANOPARTIKEL PERAK PADA SUBSTRAT PADAT Rizky Ardie Yani; Iwantono '; Akrajas Ali Umar
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Silver nanoparticles have been successfully grown on solid substrate. The growth of the particles used wet chemical method which consisted of two steps, seeding and growing steps. The silver nanoparticle growth was carried out by two variations which were surfactant’s concentration and ascorbic acid’s volume. The UV-Vis spectrum profile of the samples described that the growth of silver nanoparticles of spherical shape was dominated on the ITO, represented as a sharp single peak of the absorption spectra. Its characterization measured by XRD showed that silver nanoparticles had grown on the substrate with crystal orientation (1 1 1) and (2 0 0). The FESEM images depicted that the shape of silver nanoparticles was a spherical shape with their uniform diameter size of 300-650 nm.

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Kota pekanbaru,

Riau

INDONESIA