Abstract :

In general, meat processing in Indonesia is undertaken in various ways and often uses excessive heat which can lead to the formation of benzo (a) pyrene (BaP) compound that can harm public health. The aim of this study was to reduce the content of BaP in grilled buffalo meat by treating different types of meat and grilling time compared to buffalo meat without marinating. This study was conducted using a factorial randomized block design with 2 factors and 3 replications: (1) type of meat; buffalo and beef combined with marinade, (2) grilling time; 10, 20, 30 minutes. Marinated meat samples had a higher antioxidant capacity than unmarinated meat samples. Grilling time affected the level of BaP content produced. This study indicated that samples of marinated buffalo meat had lower BaP content than samples of marinated beef and unmarinated buffalo meat. Meanwhile, the increase in the duration of grilling led to an increase in the content of BaP in both types of meat. The conclusion of this study is that the use of the marinade in buffalo meat and grilling time of 10 minutes can inhibit the formation of the highest BaP compound in grilled buffalo meat.

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Abstract : The Shell Eco-Marathon is a competition for students, created by Shell, the British hydrocarbon energy company, and is held in the USA, Brazil, Europe and Asia. The challenge is to build the most energy-efficient vehicle. It seeks to transform the way mobility is viewed by allowing the use of alternative fuels, including electric or hybrid engines [1]. For the team, competition is the opportunity to propose efficient transportation in daily trips in a congested city (home-work-home), where reaching high speed is a utopia, so, low consumption becomes more important in addition to mitigating the impact on the environment and resulting in an economic benefit. Therefore, for the selection of the vehicle's engine, the balance of weight-power-consumption was found in the existing engine options..
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Abstract : Sayung District, which is located in the Demak Regency of Central Java Province, has been experiencing the shorelines and land use changes due to erosion and sedimentation process. The present study aims to analyze the changes that occurred during the periods of 2007-2011 and 2011-2017, to study the differences in shorelines due to erosion and sedimentation, and how the changes in coastline affect the landuse. The image data used was obtained from Landsat 5 and Landsat 8. The method of processing image data included a geometric correction, radiometric correction, cropping, digitation on-screen and image classification—spatial data analysis using the overlay method. Field observations were carried out in July-August 2017 in the coastal area of Sayung District. The results of the study show that the area of erosion changed from 365.64 ha in 2007-2011 to 359.01 ha in 2011-2017 and the area of sedimentation changed from 14.82 ha in 2007-2011 to 56.32 ha in 2011-2017. Based on the image classification, Sayung is composed of eight types of land uses: inundation, industries, dry land, sea, mangroves, settlements, ponds, and land vegetation. The most significant land-use change during 2007-2011 occurred in the settlement land. From the initially 1103.85 ha, 339.84 ha of the settlement land became inundated land. During 2011-2017, 435.13 ha of the originally inundated land turned into fishponds. The present study concludes that the change in shorelines in Sayung District is in line with the change in landuse..
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Abstract : DGAT1 (Diacylglycerol Acyltransferasal1) gene contributes to fatty acid regulation and considered as a potential candidate gene for meat quality. This study aimed to explore the polymorphism of the DGAT1 gene in Indonesian sheep and its association with carcass weight, meat quality, and retail cuts. A total sample of sheep used 169 rams of 10-12 months old from unrelated family and different farms consisted 20 Garut sheep (GS), 35 Compass Agrinak sheep (CAS), 36 Barbados cross sheep (BCS), 20 Javanese fat-tailed (JFT), 17 Javanese thin-tailed (JTT), and 41 Garut composite sheep (GCS). Polymorphism of the DGAT1 gene were identified using Polymerase Chain Reaction-Restriction Fragment Length Polymorphism (PCR-RFLP) with AluI restriction enzyme. The results of identification found two genotypes namely CC dan CT in GS, JFS, and JTT indicate that polymorphism in the DGAT1 gene. This polymorphism is associated (P<0.05) with characteristics and retail cuts of carcass including the weight of carcass, the weight of breastbone, and weight of subcutaneous breast fat. CC genotype had higher weight in characteristic and retail cuts of carcass than the CT genotype. However, the mutation of DGAT1 was not significantly associated (P>0.05) with meat quality. It could be concluded that polymorphism of DGAT1 contributed to characteristic and retail cuts of the carcass in sheep..
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Abstract : This study aims to find the optimal parameters to produce good dimensional accuracy and maximum bending strength in the FDM 3D printing using a Cu-PLA filament. The parameters used in this research are nozzle temperature, layer height, and infill pattern with 2 levels for each parameter. The experimental design used the Taguchi L4 method (23). The specimens were printed according to the ASTM D790 standard using the REXYZ A1 3D printer machine. From the results of the calculation of the average S/N ratio, the best dimensional accuracy when using variations of nozzle temperature 220 oC, layer height 0.3 mm, and infill pattern lines. While the maximum bending strength when using a nozzle temperature variation of 240 oC, layer height of 0.4 mm, and the octet infill pattern. Each factor contributes to dimension accuracy in per cent as accuracy is 9.16 %, nozzle temperature, 4.01 % layer height, and 19.56 % infill pattern. In other words, all factors did not have a significant contribution to the accuracy. Meanwhile, the contribution of each parameter to the bending strength is nozzle temperature 57.66 %, layer height 15.22 %, and infill pattern 0.44 %..
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