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All Journal Jurnal Ternak IJIMCE : International Journal of Innovation in Mechanical Construction and Energy
Rusiyanto
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Veterinary

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Combined Ultraviolet-C and Pasteurization Methods to Extend the Shelf Life of Cow's Milk Rengga, Wara Dyah Pita; Ridwan Dani Hibatullah; Miftakhul Izza Arinanda; Muhammad Fajrul Rohman; Ria Wulansarie; Rusiyanto
Jurnal Ternak : Jurnal Ilmiah Fakultas Peternakan Universitas Islam Lamongan Vol 15 No 2 (2024): Desember, 2024
Publisher : UNIVERSITAS ISLAM LAMONGAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/jt.v15i2.241

Abstract

Milk is classified as an animal food that is easily damaged because it contains high nutrients and water, so it is ideal for microbial growth. The common milk preservation technique is pasteurization. However, in pasteurization, heat-resistant bacteria are still able to survive. This study aims to find Total Plate Counternative methods of processing cow's milk, namely by innovating the combination of ultraviolet-C radiation and pasteurization methods to reduce the number of milk microbes while still prioritizing quality and safety. The ultraviolet -C modified pasteurization apparatus was given three treatments, i.e. radiation process then pasteurization process, pasteurization process then radiation process, and simultaneous (combined) process. The results showed that the simultaneous process resulted in a reduction percentage of bacteria of 99.996%, from the number of bacteria in milk which was originally 6.2×106 to 1×103 CFU/mL. The shelf life of milk with the simultaneous method showed the best results with an TOTAL PLATE COUNT test of 10 CFU/ml after 6 months of storage. The results showed that the degree of acidity (pH) before and after treatment of the three sterilization methods did not show a significant change. Simultaneous method or ultraviolet C radiation modified pasteurization process can be an Total Plate Counternative method in milk sterilization and increase shelf life.
The Effect of Aegle Marmelos Shell Particles Size on The Mechanical Properties of Epoxy Matrix Composites as An Alternative Material For Motorcycle Disc Brake Pad Firman Ocviansyah, Danny; Rusiyanto
IJIMCE : International Journal of Innovation in Mechanical Construction and Energy Vol. 1 No. 2 (2024): IJIMCE : International Journal of Innovation in Mechanical Construction and Ene
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ijimce.v1i2.30

Abstract

The particle size can effect the mechanical properties of composite materials. Variations in particle size will form different mechanical properties in the composite. The particle size variations used in this research are 100 mesh, 120 mesh, and 140 mesh. Making composites using a volume fraction of 30% aegle marmelos shell powder, 20% aluminum powder, and 50% epoxy resin using the hand lay-up method. This research design uses true experimental design with posttest-only design type, there is an experimental group (composite) and control group (Indoparts brand brake pads). Mechanical testing carried out is toughness / impact testing, rockwell-b hardness testing and wear testing. The highest toughness value was obtained in the composite with 140 mesh particle size variation of 0.01180 J/mm2. The highest rockwell-b hardness value was obtained in the 140 mesh particle size variation of 76.9 HRB. The hardness value is closest to the value of the Indoparts brand brake pad. This shows that the smaller the particle size, the hardness value increases. The most optimal wear test results were obtained in the 100 mesh particle size variation with a value of 5.7357 × 10-7 mm2/kg. This value is the closest value to the value of the Indoparts brand brake pad. So it can be concluded that aegle marmelos shell powder can be recommended as an alternative material for motorcycle brake pad.
The Effect of Compaction Pressure of Evaporation Boats, Kaolin and Rice Husk Charcoal Composition on Thermal Conductivity and Microstructure Casminto; Rusiyanto; Sunyoto; Kriswanto
IJIMCE : International Journal of Innovation in Mechanical Construction and Energy Vol. 1 No. 2 (2024): IJIMCE : International Journal of Innovation in Mechanical Construction and Ene
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/ijimce.v1i2.31

Abstract

Evaporation boats waste is a waste that is difficult to decompose which has characteristics as a material for makingowi, but its utilisation is still not optimal. The purpose of this study was to determine the effect of compaction pressure on the thermal conductivity and microstructure of aowi made from evaporation boats, kaolin and rice husk charcoal. The research method used was experimental. The independent variable used in this study is the kowi compaction pressure with variations of 20 MPa, 25 MPa, 30 MPa, 35 MPa. The composition of the materials used is 50% evaporation boats, 35% kaolin powder, and 15% rice husk charcoal and 15% water from the total weight of the materials in the mixing. The dependent variables in this study are thermal conductivity testing and microstructure observation. Control variables in this study are powder particle size 100 mesh, mixing time 90 minutes, thickness 2 and 4 mm, specimen diameter 40 mm, firing temperature used 8000C, and holding time 2 hours. The results showed that the average value of the highest thermal conductivity of 4.1045 W / MK at a compression pressure of 35 MPa and the lowest thermal conductivity value of 3.3499 W / MK at a compression pressure of 20 MPa. The higher the compression pressure, the greater the value of thermal conductivity. This is because the greater the compression pressure, the stronger the bond between particles and pores are reduced so that the density increases. The microstructure shows a difference in phase at each compression pressure given. The greater the compression pressure applied, the tighter the density of the material. Keywords: Compression Pressure, kowi, evaporation boats, kaolin, rice husk charcoal, thermal conductivity, microstructure
Co-Authors Casminto Firman Ocviansyah, Danny Kriswanto Miftakhul Izza Arinanda Muhammad Fajrul Rohman Ria Wulansarie, Ria Ridwan Dani Hibatullah Sunyoto Wara Dyah Pita Rengga