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Erwin '
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Dentistry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Health Professions Materials Science & Nanotechnology Mathematics Nursing Physics Public Health Veterinary

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ANALISA PENGARUH VEGETASI TERHADAP TINGKAT KEBISINGAN DI SEPANJANG JALAN RAYA PEKANBARU-BANGKINANG Azura '; Erwin '; Defrianto '
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

The influence of vegetation such as ketapang, sengon, mango, of acacia, durian andpalm along Pekanbaru-Bangkinang highway against noise level has been studied. Noisesource was originated from sound of vehicles passing through the highway. An instrument used to record the noise level in the study is Sound Level Meter (SLM). In order to obtain the absoption of noise level, then it was used 2 SLMs. The first SLMwas utilized to record the noise directly generated by vehicles without any obstaclesand the second SLM was located behind the trees as sound obstacles. The position ofthose two SLMs was arranged along the road with the distance of about 15 m from thehighway. The next measurement was to record the noise level for one day started from7: 00 a.m until 6: 00 p.m along the highway. The influence of the distance against thenoise level was also studied. The result of this research showed that palm trees has thehighest effect on noise reduction and followed by acacia, mango, durian, sengon andketapang trees. The high absorption of sound by palm tree of about 6.092% because the volume of the palm leaves per percentage of the absorption is smaller compared tothose for other vegetations. These results were compared to those of Maekawa andISO9613 calculation. From the comparison, it was obtained that Maekawa calculation ishigher compared to those of this research, while the ISO9613 calculation was lower.The error percentage of the calculation for Maekawa and ISO9613 was 6.82% and8.76% respectively. The profile of one day noise along the highway as a function of time showed that there were two peaks of noise that were occurred at 09.00-10.00 and17.00-18.00. Moreover, the noise level was reduced very significantly from 71.90dB(A) to 63.58 dB(A) as the measurement away from the noise source.
Effect Enrichment Daphnia sp . Viterna With Survival and Growth of Catfish Larvae baung (Hemibagrus nemurus) Erwin '; Nuraini '; Sukendi '
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

The research was conducted from January to March 2016 at No. 38 Panam . This study aims to determine the survival and growth of the best in fish larvae baung ( Hemibagrus nemurus ) by feeding Daphnia sp . enriched with VITERNA . The method used in this study is an experimental method , while the design used was completely randomized design ( CRD ) with two- level factorial treatments and two replications . By immersion 3 hours and 5 hours. P0 ( control ) , P₁ ( I Enrichment viterna with a dose of 20 ml / l ) , P₂ (Enrichment viterna with a dose of 30 ml / l ) , P₃ (Enrichment viterna with a dose of 40 ml / l ) . Growth highest in absolute weight soaking 5 hours at a dose of 30 ml / l ie 0498 g . Length growth the absolute highest in soaking 5 hours at a dose of 40 ml / l which is 2,655 cm , while the daily growth rate is highest in the soaking 5 hours at a dose of 30 ml / l which is 6365 % , and the rate of survival is highest in the immersion 3 hours at 20 doses of 100 % .Keywords: Hemibagrus nemurus,viterna , growth, and survival
Co-Authors Azura ' Defrianto Defrianto Endah Mulyani Ginisa Ardiyani Hera Didana Herianto ' Ikrah Noprianti INDAH CAHYANI Juandi Juandi Krisman ' Lendra Kusma Lita ' M. Rasyid Ridho Mbantun Ginting Mutiara Akhdesia Nasib ' Natalia ' Nofrita Sari Nuraini ' Ramadhani Herlly Riad Syech Rika Sawitri Rio Fauzi Salomo ' Septina Sari Silvia Noviana Sukendi Sukendi SURYA NINGSIH Usman Malik Widia Rahim Zulkarnain '