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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 424 Documents
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PENENTUAN BESAR ENERGI LISTRIK AKI DENGAN MEMVARIASIKAN JUMLAH AIR SULING (H2O) DAN ASAM SULFAT (H 2SO4 ) Romadona '; Maksi Ginting; Sugianto '
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

A research has been conducted to determine electrical energy  of accu   with variation of volume  of distilled water and sulfuric acid. In this study, an  electrolyte solution  of 400 ml  was prepared  for each accu  consisting of a mixture of distilled water and sulfuric acid with different compositions.  Measurements  of each sample  were  carried out at  the interval time of  15 minutes for 2 hours. The results showed that the  amount of  energy produced by  accu  with a standard electrolyte solution  expenses  factory for 2 hours  was 114.14   kilojoules. The amounts  of  energy  obtained  from the  variation of  the mixture composition  of the electrolyte solution  ratio  were  154.23  kilojoules, 156.73  kilojoules, and  141.61 kilojoules, respectively for a mixture of distilled water and sulfuric acid witha composition ratio  of  64% :  36%, 60% :  40%,  and  70% : 30%,  where  as  for a mixed electrolyte solution with  aquabides and  sulfuric acid,  resulted the energy of  164.18 kilojoules, 157.37 kilojoules, and  148.52 kilojoules, respectively for the mixture ratio of 64%  : 36%, 60%  : 40%,  and  70%  : 30%.  Conclusion,  the  largest energy   produced  was obtained  by the  accu with  electrolyte solution  containing a  mixture of  sulfuric  acid  and  aquabides with the composition ratio of 64% : 36%.
ISOLASI DNA DAN AMPLIFIKASI FRAGMEN D-LOOP MITOKONDRIAL PADA IKAN Ompok hypophthalmus (Bleeker, 1846) DARI SUNGAI KAMPAR PROVINSI RIAU Della Rinarta; Roza Elvyra; 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

Total DNA molecule and fragment of the mitochondrial D-loop region is needed to determine the nucleotides sequence of mitochondrial D-loop region from lais danau fish (Ompok hypophthalmus). Therefore, this study aimed to isolate and amplify mitochondrial D-loop region that can be used as genetic information resources of O. hypophthalmus. The samples of O. hypophthalmus were taken from flood plain river in Riau, Kampar River. Tail muscle of O. hypophthalmus was used for DNA isolation. DNA molecules were amplified using PCR machine with L15926 and H00651primers. The total DNA of O. hypophthalmus was obtained in this study. The amplification process produced 153 bp fragment mitochondrial D-loop region of O. hypophthalmus.
ANALISIS KUAT TEKAN BETON TANPA TULANGAN DENGAN MENGGUNAKAN METODE UJI TAK RUSAK BERDASARKAN KECEPATAN GELOMBANG SONIK Yudi Candra; Riad Syech; Sugianto '
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 on the testing of concrete elasticity has been done in order to measure concrete compressive strength  using a non destructive test based on sonic wave velocity. An equipment that was used for this research was a Sonic Wave Analyzer (SOWAN). In this research, concrete samples were formed in cylindrical shape with 15 cm diameter and 30 cm length. The compressive strengths of this concrete were 19  , 23    , and 25      ( ⁄ ). After that the time delay of sonic wave was measured. The research results showed that primary and secondary sonic wave velocity, elasticity, and compressive strenght were    = 3525 m/s,    = 1950 m/s,  23240  x N/ , and  24 x    ( ⁄ )  respectively. Based on the data, it was concluded that this non destructive test based on sonic wave velocity can be used to measure the concrete compressive strength, because the values obtained were comparable to the values obtained using the Universal Testing Machine (UTM) which is a destructive test.
PENENTUAN SIFAT LISTRIK AIR PADA WADAH ALUMINIUM DAN BESI BERDASARKAN PENGARUH RADIASI MATAHARI Yusuf Syetiawan; Sugianto '; Riad Syech
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

A  research has been conducted  to  determine  the electrical properties  of water  in  an aluminum and  iron  containers.  The  waters  used  were  well  and  rain  water using  metaland  aluminum  containers.  This research was conducted  using  an experimental method. The results showed  that  the  best  electrical properties  was  found from  rain  water  in the aluminium  container  with its  resistivity  of  18.294m ,  electrical  power  of  0.00046  W, electrical energy  of  2,941  J  and  electrical  conductivity  of  0.055  (1)m.  The  resultsindicated  that  greater  solar radiation  in  the  water  could  produce  of  electrical properties greater  than  that  of water  on  the electrical  properties of  the electrical  resistivity.The affecting factor of electrical  properties of  the rain  water  was  concentration  of  Fe  and  Cu. The  concentrations  of  Fe  and  Cu  in  rain  water  was  0,065  ppm  and  0,050  ppm.  It was also found that  the smaller  the  concentrations of  Fe  and  Cu  levels  in  solution  was  the purer the solution.
DISTRIBUSI DAN KELIMPAHAN SEMAIAN Rhizophora PADA ZONA INTERTIDAL DI EKOSISTEM MANGROVE DESA JAGO-JAGO KABUPATEN TAPANULI TENGAH Reynhard '; Khairijon '; Mayta Novaliza Isda
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

This research was conducted from April until May 2013, and aimed to identify and analyze the distribution and abundance of Rhizophora seedlings in the intertidal zone of mangrove ecosystem in Jago-jago Village. The observed parameters were distribution, abundance, and water and soil quality. The observation of seedling sample at front, middle, and back of the intertidal zone were systematically conducted using a transect method, where each transect consisted of four plots (4m x 4m in size). The result found two Rhizophora species, namely R. apiculata and R. mucronata that have grown in environments with ideal conditions of temperature, salinity, and pH. The highest abundance of Rhizophora seedlings (11406,25 ind/ha) was found in the middle of intertidal zone. The distribution of Rhizophora seedlings at Jago Jago Village according to morisita index is uniform (Ip< 0).
PEMANFAATAN Azolla pinnata R. Br DALAM PENYERAPAN Zn DARI LIMBAH CAIR PABRIK KARET SEBAGAI FITOREMEDIATOR Arimby, Citra; Lestari, Wahyu; Azis, Yelmida
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

Large rubber plantations in Riau Province create rubber factories, that potentially produce liquid waste contain Zn above the environment quality standard, that may cause water pollution. Efforts to overcome pollution caused by the waste can be done by phytoremediation using Azolla pinnata. The purpose of this research was to test the effect of rubber factory liquid waste on the growth of A. pinnata. The research used Complete Random Design with dilution of waste treatments 25, 50, 75 and without dillution (100%), and no waste treatment as a control. A. pinnata was grown in each treatment for 12 days. Data was analyzed using ANOVA and tested further with LSD at 5% level. The results showed that the fresh weight of A. pinnata in the waste without dilution increased up to 60.87 g with the highest relative growth was found in 9th day in two treatments (75% dilution and without dilution).
PERBANDINGAN KANDUNGAN LOGAM BERAT (Cu, Fe dan Zn) PADA AIR SUNGAI SIAK SEBELUM DAN SESUDAH PROSES PENJERNIHAN Rutmayanti Pandiangan; Sugianto &#039;; Usman Malik
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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Comparison  of heavy metal  (Cu,  Fe  and  Zn)  content of Siak  river water  between before and after purification process has been done using an experimental method. The processstarted  by taking  sample of  the Siak River  water  at a distance of  1  meter  from  waste sewage system  of  rubber  manufacturing industry  PT.RICRY  Pekanbaru.  Concentration of pre-filtered  samples  was measured by  atomic absorption  spectrophotometer  (AAS), then each sample  was  filtered five times.  The result of pre-filtered samples characterized by  (AAS) of  Cu,  Fe  and  Zn  were  0.3809  ppm,  0.0051  ppm,  and  -0.0012 ppm.  The absorption percentage  of samples  characterized by  (AAS) for Fe, Zn and Cu were 12,02 %, 33,33 % and 72,54 %,  respetively (type I) and 33,15 %, 2,70 % and 80,39 % respetively for type II.  Based on the  obtained data,  it was concluded  that  the purity instrument  of  type I  was better  than  type II  for  water treatment.
PENENTUAN NILAI KALORI DETRITUS HUTAN MANGROVE DENGAN MENGGUNAKAN BOMB CALORIMETER Andi, Pos; ', Sugianto; Emrinaldi, Tengku
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 to determine a  calorie  quality    of mangrove detritus using Bomb  Calorimeter. The measurements  were carried out in  order to measure the physical parameters,  such as water content,  concentration of  ash, amount  of sulfur, and calorie content. Each sampel was treated on the same pressure and volume. The sampleswere taken from Dumai city on five different regions. Quality test  to the  samples resulted calorie content of 4.185 cal/g, the degree of water of 14,29 %, the  degree of ash of 4.48 % and the amount of sulfur of 0,03  %  for sample of point A.  Meanwhile for point B, C, D, and E, the value of calorie content, degree of water, degree of ash, and degree of sulfur were 4.195 cal/g, 4.139 cal/g, 4.164 cal/g, and 4.002 cal/g,  13,90 %, 14,30 %, 13,10 %,  and 13, 80 %, 4,84 %, 5,45 %, 4,59 %, and 6,10 %, and 0,11 %, 0,11 %, 0,15 %,  and  0,19 %, respectively . Among the four  physical parameters, calorie content is the most  important parameter to indicate the quality of detritus of mangrove. Based on the obtained data, the sample  of point B was the best sample  because of its highest calorie content compared to the other samples.
PENGGUNAAN GELOMBANG AKUSTIK PADA PROSES PEMISAHAN PARTIKEL PENGOTOR DALAM AIR DENGAN MENGGUNAKAN TABUNG RESONANSI Lifa Anggar Mayasari; Defrianto &#039;; Riad Syech
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 done on the use of acoustic waves in order to separate pollutant particles in water. This research has been performed by an experimental method utilizing the second and the third harmonic mode of acoustic waves.  The results showed that the use of both modes was affected by their intensity. It was proved that the treatment of the second harmonic mode wave  yielded the  difference of concentration of water that depended on the intensity level ( IL ) of the wave.  The value of 0.035 mg/L, 0.09 mg/L, and 0.15 mg/L have been found respectively, for the IL of 83.2 dB, 92.4 dB, and 102.3 dB by second harmonic mode treatments to the water of 0.40  mg/L. Meanwhile, the use of the third harmonic mode wave treatments to the same water samples gave the differences of concentration of 0.07 mg/L, 0.11 mg/L, and 0.17 mg/L respectively, for the ILs of 65.9 dB, 75.2 dB, and 84.8 dB. It was showed that the treatment of the third harmonic resulted bigger difference concentration of the samples. The bigger the difference concentration, the better the separation of pollutant particle in the sample. It can be concluded that acoustic waves can  be used to separate the pollutant particles in water.
EFEKTIVITAS PERENDAMAN TERHADAP NILAI KEKUATAN UYUNG SAGU (Metroxylon sagu) ASAL PULAU PADANG BERDASARKAN KARAKTER SERAT Tiara Maulidza Riyani; Fitmawati &#039;; Dyah Iriani
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

Padang island is one of the islands that has the high Sago germplasm (Metroxylon sagu) in Kepulauan Meranti, Riau Province. This region has abundant sago bark waste called sago uyung but it has not been used properly. Sago uyung potentially produce a strong and termite resistant wood that can be used as handcraft raw material. This study aimed to analyze the effectiveness of wood soaking in three water types to the strength of uyung spined-sago of Padang island based on fiber characters. The uyungs of spined-sago were collected from three different habitats of sago, i.e. peat habitat, transition zone of peat and clay habitat as well as clay habitat, and treated in three water types, i.e. peat, sea and fresh water. The measurement and observation of fiber characters used a maseration method. This result showed that based on the treatments, uyung that soaked on the sea water gave the best result due to the longest and widest fiber. Moreover, based on the types of habitat, uyung from the transition zone of peat and clay habitat had the longest and widest fiber. The interaction of uyung from the transition zone of peat and clay habitat with sea water soaking was more effective in producing a strong sago uyung.

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