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All Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Prosiding Semnastek
Wiwit Kartika Sari
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Computer Science & IT Earth & Planetary Sciences

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Reproductive Biology of Mystus nigriceps C.V, 1840 from the Tapung Kiri River, Pantai Cermin Village, Tapung District, Kampar Regency, Riau Province Wiwit Kartika Sari; Ridwan Manda Putra; Efawani Efawani
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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 Abstract Mystus nigriceps is present in the Tapung Kiri River. A study aims to understand the reproductive biologi of M. nigriceps has been conducted from April to May 2018. Fish sampling were conducted once/ week. Parameters measured were sex ratio, gonad maturnity level, gonad somatic index (GSI), fecundity and egg diameter. Results shown that there were 37 males and 63 females (sex ratio 1:2). There were 2 differences between male and female fish. There was  a white spot in the male fish tail, and the shape of the male genital papilla is pointed, while that of the female is blunt. The size of females ranged from 86-157 mm (SL) and body weight was 7.28 to 93.23 g, while that of the  males was 86-154 mm (SL) and the body weight 31.59 to 29.90 g. The GSI of females ranged from 0.12 to 17.43%, while that of males was 0.09 to 2.91%. The fecundity was 9.907 to 18.948 egg/ fish and egg diameter was 0.54 to 0.58 mm.Keyword: Sex Ratio, Gonad Maturity Level, Gonad Somatic Index, Fecundity
ANALISA DESAIN TABUNG BAHAN BAKAR GAS JENIS COMPRESSED NATURAL GAS (CNG) PADA MOBIL BUS TEKANAN 200 BAR Anwar Ilmar Ramadhan; Ery Diniardi; Wiwit Kartika Sari
Prosiding Semnastek PROSIDING SEMNASTEK 2014
Publisher : Universitas Muhammadiyah Jakarta

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Tabung  Bahan  Bakar  Gas  (BBG)  jenis Compressed  Natural  Gas (CNG)  yang  digunakan  padamobil  bus,  merupakan  jenis  bejana  tekan. Tekanan  pada  tabung  ini  berasal  dari  isi  atau  fungsitabung  sebagai  tempat  penyimpanan  fluida  gas  yang  bertekanan.  Tujuan  analisa  ini  diantaranyauntuk mengetahui karakteristik desain tabung, menghitung kekuatan material bahan menggunakanrumus  formula  serta  mengetahui  fenomena  yang  tejadi  pada  penggunaan  material  terhadappengaruh  desain  tabung  BBG  menggunakan  simulasi software CAD  dalam Solidworks. Padapenelitian  ini,  dilakukan  analisa  perbandingan  kekuatan  material  tabung  BBG  menggunakanmaterial  standar  yakni  30  CrMo  dengan  material  pembanding  AISI  4130  dan  SG  295.  Darikeseluruhan hasil perhitungan dan analisa didapatkan bahwa material yang digunakan pada tabungBBG jenis CNG yakni 30 CrMo merupakan jenis baja paduan (Alloy Steel), memiliki Factor OfSafety yang baik, aman digunakan bahkan pada tekanan 300 bar.
Co-Authors Anwar Ilmar Ramadhan Efawani Efawani Ery Diniardi Ridwan Manda Putra