Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal TEKNIK Authentic Research of Global Fisheries Application Journal (Aurelia Journal) Jurnal Polimesin
Mohamad Djaeni
Universitas Diponegoro
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

Published : 3 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 3 Documents
Search

 1 
SANITASI DAN HIGIENE PADA PROSES PENGOLAHAN BAKSO TUNA DI POKLAHSAR LAMADANG Meilya Suzan Triyastuti; Mohamad Djaeni; Dolfie Djefrie Kaligis; Nova Magdalena Tumanduk; Fidel James Ticoalu; Fernando Wowiling
Aurelia Journal Vol 4, No 1 (2022): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v4i1.10741

Abstract

Sanitasi dan hygiene merupakan syarat penting pada standar keamanan produk. Syarat untuk menghindari kontaminasi langsung dan pemalsuan produk pangan. Penelitian ini bertujuan untuk mengetahui penerapan sanitasi dan hygiene pada Poklahsar Lamadang di Kecamatan Girian, Kota Bitung. Metode penelitian ini menggunakan metode deskriptif.  Data penelitian diperoleh melalui observasi, dokumentasi dan wawancara terkait sanitasi dan hygiene. Hasil penelitian menunjukkan bahwa sanitasi dan hygiene pada pengolah bakso Ikan Tuna di Poklahsar Lamadang telah memenuhi standar sanitasi dan hygiene pada pengolahan pangan.
Experimental investigation of perforated and non-perforated Delta Winglet Pairs for heat transfer and pressure drop optimization Yafid Effendi; Syaiful Syaiful; Mohamad Djaeni; Muhammad Untung Zaenal Priyadi
Jurnal Polimesin Vol 23, No 3 (2025): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i3.6627

Abstract

This study experimentally investigates the impact of Delta Winglet Pairs (DWPs) on heat transfer and friction factor in a rectangular duct. Configurations varied by the number of DWP pairs (one, two, and three) and the presence of perforations on the winglet.  The performance was evaluated using the Nusselt number ratio (Nu/Nu₀) and friction factor ratio (f/f₀), compared to a smooth baseline. Results show that non-perforated DWPs enhanced heat transfer more effectively, with a maximum 27% higher Nusselt number than perforated ones. Increasing the number of DWP pairs improved thermal performance further, aided by higher airflow velocities that enhanced fluid mixing. In terms of pressure loss, the friction factor decreased with increasing velocity, while more DWPs increased pressure drop. Perforated DWPs reduced average friction by 47% compared to non-perforated ones, due to jet flow effects. Evaluation of the Thermal Enhancement Factor (TEF) revealed that although both configurations benefit from higher airflow, non-perforated DWPs achieved a 13.8% higher TEF than the perforated type. These results suggest that while non-perforated DWPs are optimal for maximum heat transfer, perforated DWPs offer a more favourable trade-off when pressure loss must be minimized.
Peningkatan Kecepatan Proses dan Mutu Minyak Bekatul melalui Proses Ekstraksi Berbantukan Ultrasonik Mohamad Djaeni; Yuniar Luthfia Listyadevi
TEKNIK Vol 40, No 1 (2019)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (697.703 KB) | DOI: 10.14710/teknik.v39i3.22826

Abstract

Rice bran oil is one of the oils that has been widely used in the chemical, pharmaceutical and food industries considering the high essential content such as antioxidants, vitamins that are good for the body. Extraction of ultrasonic assisted bran oil is one of many method used to reduce extraction time. The purpose of this study was to examine the effect of extraction methods on mass transfer of bran oil, antioxidant quality, and the quality of bran oil during the extraction process at the temperature, extraction time, and the right solvent ratio. Mass transfer of bran oil was evaluated based on the effect of various temperatures, extraction times, and solvent ratios to predict the right tim e to get a lot of bran oil. Chemical quality (antioxidant content of α-tocopherol) and physical quality (oil color) of bran oil were studied so that they were able to predict temperature, extraction time, and relatively good solvent ratio. The results showed that yield increased with increasing temperature and extraction time. However the antioxidant value of α-tocopherol will decrease with increasing temperature, extraction time and solvent. The recommended operating conditions for obtaining yields and antioxidant values at 40ºC, material to solvent ratio 1: 5 and extraction time for 51 minutes.
Co-Authors Dolfie Djefrie Kaligis Fernando Wowiling Fidel James Ticoalu Meilya Suzan Triyastuti, Meilya Suzan Muhammad Untung Zaenal Priyadi Syaiful . Tumanduk, Nova Yafid Effendi Yuniar Luthfia Listyadevi