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Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam
Published by Universitas Riau
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Core Subject : Education,
Mathematics
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Articles 222 Documents
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Search results for , issue "Vol 1, No 2 (2014): Wisuda Oktober 2014" : 222 Documents clear
PARASIT PADA BELUT SAWAH ( Monopterus albus, Zuiew 1793 ) DI DESA SAWAH KECAMATAN KAMPAR UTARA Syauli Ashari Khati; Radith Mahatma; WIndarti '
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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Monopterus albus, Zuiew 1793 (Synbranchidae) or swamp eel is rich in proteinand commonly used in Riau’s culinary. It is easily found in muddy areas, ricepaddy fields and in the organic material polluted area where this fish is able totolerate to the polluted environment. Fish living in the organic polluted area mayface the risk of parasite infection, including the zoonotic parasite that may infecthuman being. To understand the parasite present in swamp eel, a study had beenconducted. The study area of this research was a domestic polluted swamp area inthe Sawah Village (Kampar Regency Riau). Thirty eels from this area were usedfor parasite identification study. Results showed that among the samples, 14 fisheswere infected by nematode parasite Gnathostoma spp. This parasites were presentin the gonad, liver, body wall and peritoneum. The parasites were found in 5developmental stages namely egg, 1 st , 2 nd , 3 rd and 4 th larvae.
STRUKTUR KOMUNITAS MEIOFAUNA DI KAWASAN MANGROVE DESA TELUK UMA KABUPATEN KARIM Suryani '; Radith Mahatma; Khairijon '
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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Information on meiofauna community structure in Indonesian mangrove areas is stilllimited compared to its vast areas. This study aimed to assess the community structureand abundance of meiofauna on four stations in mangrove areas, located in Teluk UmaVillage, Karimun Regency. Samples were collected from four stations. Station 1, 2,and 3 are dominated by mangrove vegetation Rhizophora sp., Avicennia sp., Bruguierasp., consecutively while station 4 is located in an area without mangrove vegetation(Coral Sand). Meiofauna abundance was analyzed using one-way ANOVA and Fisher'stest. The result indicated that meiofauna which were found at the study site consisted of12 taxa namely, Nematodes, Copepods, Polychaeta, Turbellarian, Cumacea,Oligochaeta, Holothuroidea, Syncarida, Isopoda, Ostracoda, Cnidaria, and Tardigrada.The average abundance of meiofauna was 3.22 ind/10 cm 2 . It was also found thatNematodes was the most abundance taxa followed by Copepoda and Polychaeta at allstations. One-way ANOVA results revealed that the abundance of meiofauna in eachstation was significantly different (F=3.52 P<0.05).
ANALISIS FENETIK TANAMAN KARET (Hevea brasiliensis (Willd. ex A. Juss) Mull. Arg.) BERDASARKAN PENANDA ISOZIM DI LIMA KABUPATEN SENTRA PERKEBUNAN KARET RIAU Ivo Mayasari; Fitmawati &#039;; Minarni &#039;
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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Many kinds of rubber plants (Hevea brasiliensis (Willd. ex A. Juss) Mull. Arg.)has been cultivated in Riau Province. Phenetic analysis of rubber plants can giveinformation about their relationship. Study to obtain information about the relationshipamong rubber plants which are grown in 5 rubber plantation centers in Riau wasconducted based on isozyme markers. A total of 15 trees had been studied. The sampleswere taken from 5 regencies i.e. Bengkalis, Meranti, Kuantan Singingi, Kampar, andRokan Hulu using an exploration method. Four enzymes (PER, EST, ACP, and AAT)were used for similarity and clustering analysis using NTSys program version 2.02. Theresult of this research showed 19 polymorphic bands, 9 bands from PER, 5 bands fromEST, 2 bands from ACP, and 3 bands from AAT enzyme. The similarity analysis of 15individuals showed that the similarity coefficient ranged from 0.47-1. The clusteringresult showed that all of individuals were grouped at the coefficient of 0.59. Most of thesamples were grouped together based on the band similarity. However, all of samplescollected from Bengkalis, as well as Kuantan Singingi, formed a cluster due to the highband similarity.
ANALISIS KORELASI KARAKTER MORFOLOGI TANAMAN KARET (Hevea brasiliensis (Willd. ex A. Juss) Mull. Arg.) DENGAN PRODUKTIVITASNYA DARI LIMA SENTRA PRODUKSI KARET PROPINSI RIAU M. Adi Zulkifli; Fitmawati &#039;; Dewi Indriyani Roslim
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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Abstract

Rubber plant (Hevea brasiliensis (Willd. ex A. Juss) Mull. Arg.) is one ofcommercial commodities in Riau Province that distributed at several plantation centerssuch as Bengkalis Regency, Kampar, Kuantan Singingi, Meranti, and Rokan Hulu. Thepropagation of rubber plants in long period of time causes variety in latex production.Nowdays, most of the rubber plantations in Riau Province use unstandardized seedlingthat result in diverse and low latex production. The first way to increate latex productionis to identify the morphological characters related to latex production. This research wasaimed to find out the characters that had correlation with latex productivity level. Thisresearch used exploration method. Samples such branches, leaves, and seeds from 10rubber trees for each regency were collected, hence there were 50 samples wereanalyzed. The sample collection was based on the production level. A total of 66morphological characters were analyzed. Seven out of 66 observed character had acorrelation with latex production i.e. dense branch of tree, dense leaf of tree, dense leafof branch, length petiole of main leaf, length petiole of leaflet, length of leaf, and wideof lamina. These characters can be used to select superior rubber plant.
PENENTUAN KUALITAS BATU BATA MERAH BERDASARKAN KONDUKTIVITAS TERMAL Rika Utari; Sugianto &#039;; Erman Taer
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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A compressive strength testing (  ) and thermal conductivity testing (k) havebeen performed on red bricks from the district of Tenayan Raya and Rumbai. Thisresearch using a compression machine, iron, solder, thermometer, styrofoam and itspurpose was to prove the theory of the thermal conductivity having relationship tocompressive strength. The result showed that the highest compressive strength due tothe conventional red brick of Rumbai district is 10.82 x 10 5 N/m 2 and the lowestcompressive strength due to the press red brick of Tenayan Raya district is 3.67 x 10 5N/m 2 . The research results of thermal conductivity showed that the thermal conductivityvalue of the best sample of conventional red brick of Rumbai district is 1.05 J/sm  C andthe thermal conductivity value of the lowest sample of press red brick of Tenayan Rayadistrict is 0.857 J/sm  C . The affecting factor of the quality of red bricks is density. Thedensity of conventional red bricks of Rumbai district for compressive strength andthermal conductivity, are 2486.880 Kg/m 3 and 2200 Kg/m 3 , respectively. Meanwhileaverage density of press red brick of Tenayan Raya district for compressive strength andthermal conductivity are 1696 Kg/m 3 and 2000.5 Kg/m 3 , respectively. Based on theresult there was in relationship between compressive strength and thermal conductivitywhich was discribed by the regression equation Y  2 x 10  7 X  0 . 812
RANCANG BANGUN ALAT PERCOBAAN MOMEN INERSIA DENGAN MENGGUNAKAN TIMER OTOMATIS Hari Rizki Pratama; Riad Syech; Sugianto &#039;
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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A research has been conducted on designing of an automatic experiment ofmoment of inertia using a self-timer with a variation in radius of a cylinder as an inertialbody. This research was done using an experimental method and especially to design aself-timer calculation tools used in the experiment. The trial results showed that at 0.10m height average time for a cylinder rolling on an inclined plane with a slope of 2.87°for 2 m length could be represented by the regression equation that is y = 0.031x +0.400. Based on the result of the experiment, the coefficient of the moment of inertiaranged from 0.509 to 0.523 with a percentage error ranged from 1.800% to 4.600% andstandard deviation of experimental time measured from 0.011 to 0.034 seconds.
ALTERNATIF KONTRUKSI TITIK NAGEL Suryani, Indah; ', Mashadi; Natsir, 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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This paper discusses the alternative construction of Nagel point, that is the point formedby intersection of three vertices of a triangle which is connected to the points oftangency of the excircle with the opposite sides. This alternative constructionhas beenshown to pass through the incircle. Then, this paper also discusses about outer Nagelpoint(semi Nagel point) and prove the concurrence of the Nagel point.
TOTAL FENOLIK,FLAVONOID SERTA AKTIVITAS ANTIOKSIDAN EKSTRAK n-HEKSANA, DIKLOROMETAN DAN METANOL Amaranthus spinosus L EM5-BAWANG PUTIH Yondra Arif D; Christine Christine Jose; Hilwan Yuda Teruna
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 objective of this study was to analyze the total phenolics, total flavonoids, and antioxidant activities of Amaranthus spinosus L leaves. During cultivation, these plants were treated with 2 treatments, biocontrol Effective Microorganism 5 (EM5) garlic and control (water). The A. spinosus L leaves were dried using freeze dryer and extracted by dissolving n-hexane, dicloromethane (DCM) and methanol. The results showed that A.spinosus L leaves treated with biocontrol had the highest total phenolic, total flavonoid and antioxidant activity content compare to the control. The total phenolic, total flavonoid, 2,2 diphenyl-1-picrylhydrazyl (DPPH) and Nitric Oxide (NO) radical scavenging were the highest on DCM extract with each value of 74,656 mg Gallic Acid Equivalent (GAE)/g of dry weight (DW), 22,337 mg Catechin Equivalent (CE)/g DW, 0,373 mg/mL and 0,025 mg/mL. n-Hexane extract had the highest antioxidant activity on Ferric Thiocyanate (FTC) test (27,615 %), meanwhile methanol extract indicated the highest antioxidant activity on FRAP test (1,022 mmol Fe+2/g DW). From this study, it can be concluded that A. spinosus L leaves with biocontrol Effective Microorganism 5 (EM5) garlic can increase the phenolic, flavonoids and antioxidant activitiy contents of A. spinosus L plant.
ANALISIS RUGI- RUGI DAYA PADA PENGHANTAR SALURAN TRANSMISI TEGANGAN TINGGI 150 KV DARI GARDU INDUK KOTO PANJANG KE GARDU INDUK GARUDA SAKTI PEKANBARU Muhammad Radil; Riad Syech; Sugianto s
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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A research has been conducted on analysis of power losses on electric power transmission line of 150 kV of Koto Panjang to Garuda Sakti Pekanbaru in March 2014. This research was conducted and its aim was to analyze the power losses in the transmission system 150 kV. Conductors used in the high-voltage transmission line wasACSR (Aluminium Conductor Steel Reinforced) which consisted of a mixture of aluminum and steel with a diameter of 28.71 mm. Results of the transmission lineshowed that the largest total conductivity obtained was 43,645,705.993 Watt at 13:00 PM while the lowest total conductivity was 37,313,100.282 Watt at 17:00 PM. Highermagnitude of the transmitted conductivity resulted in increased power loss with ACSRconductor resistance of 0.049 Ω so that the largest loss occurred at 13:00 PM with4435.645 Watt power loss and the lowest power loss was 3,221.784 Watt at 17:00 PM.Based on the results obtained above, the percentages of power lost every hour for amonth in March 2014, were between 0.0086% to 0.0102% with the percentage ofoverall average power loss was 0.095%. 
PENGOLAHAN AIR GAMBUT DENGAN KOAGULAN CAIR HASIL EKSTRAKSI LEMPUNG ALAM DESA CENGAR MENGGUNAKAN LARUTAN H 2 SO 4 Sutrisno, Hevi; ', Muhdarina; Amri, T. Ariful
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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Liquid coagulant from Cengar clay was used for peat water treatment. The steps forproducing liquid coagulant were clay calcination at 500 o C for 3 hours and extraction by0.2 mol H 2 SO 4 solution with variation of temperature (30, 60, 100 o C) and time (1, 2, 3hours). The coagulants were tested for peat water coagulation by measuring pH,turbidity, and TDS. The results were compared to PERMENKES No.416/MENKES/PER/IX/1990 “Tentang Syarat-syarat dan Pengawasan Kualitas Air”. After coagulation,the parameters of peat water were improved. The pH value of peat water aftercoagulation was between 5.0-8.5, turbidity 2.0-6.5 NTU, and TDS 250-320 mg/L.Compared to No.416/MENKES/PER/IX/1990, turbidity and TDS from all samples aftercoagulation have met the water quality standard. The best coagulant was K 100-2 with thevalue of the parameters after coagulation were 8.39 of pH, 4.75 NTU of turbidity and258 mg/L of TDS. According to the results, it can be concluded that liquid coagulantfrom Cengar clay can be used for peat water treatment.

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