Judul: Rancang Bangun Angkong Bermesin sebagai Sarana Pengangkutan pada Proses Pengumpulan Buah Kelapa Sawit
Abstrak: Harvesting activity are one of the important activities in the palm oil production process. Harvesting activity consist of cutting fresh fruit bunches (FFB) from their stems, collection, and transport. Transportation activities in the process of collecting FFB still using simple tools, it’s wheelbarrow driven by humans. Collection FFB activity is one tough job and requires large manpower. The main topic of this research is to decrase human power load when pushing wheelbarrow with the addition of engine as a power source. Design criteria for wheelbarrow engined is to has a maximum forward speed equivalent to ability of human beings, which is 5 KPH. Design using CAD software. Adding engine is expected to increase the wheelbarrow transport capacity. The results of wheelbarrow with engine design is using 2-stroke engine with a capacity of 0.78 iii KW used from mowers engine. Functional part of the main functions are supporting frame, tub, engine cradle, 2 stroke engine, gearbox, eccentric gear, chain and sprocket, wheel, fuel tank, throttlecontrol, and handle grip. From the analysis and calculation is determined using the frame, wheels and tubs of wheelbarrow Artco branded, 2-stroke engine with a capacity of 0.78 KW, using a gearbox reduction ratio 1:20 type 40, roller chain size 40, sprocket 14T and 45T. The results from this research are design wheelbarrow with engine that have forward speed 5 KPH.
Keyword: wheelbarrows with engine design, wheelbarrow, transportation of oil palm fruits, oil palm fruits collection process

Judul: Desain Konseptual Mesin Penangkap dan Pengangkut Tandan Buah Sawit di dalam Kebun
Abstrak: In oil palm harvesting, falling fruit bunches have a considerable potential energy, which can be captured and used to power the wheelbarrow in evacuating the fruit bunches. This study was conducted to measure the coefficient of rolling resistance of a wheel barrow, analyze the potential energy of falling fresh fruit bunch, design a conceptual design of the catchment platform and evacuation machine. Measurement of wheel rolling resistance and soil penetration resistance were conducted at the evacuation track in the field. The energy potential of the falling fruit bunches was measured during harvesting, with variations of the fruit height of approximately 3 m, 8 m, 9 m and 15 m. The results showed that machine mobility in the field was very good. Soil penetration resistance was in the range of 16.44-22.10 kgf/cm2. Average coefficient of rolling resistance of the wheels was 0.159. Potential energy of falling fruit bunches were in the range of 0.44-4.44 kJ. Theoretical traveling distance of the wheel barrow using the captured potential energy was in the range of 2.27 m - 22.98 m. A conceptual design of catchment flatform and evacuation machine was designed.
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Judul: Durability of Specific Immunoglobulin (Ig) Y Againts Influenza and Covid-19 in Sunscreen
Abstrak: The benefit of specific immunoglobulin Y (Ig Y) as an active ingredient in personal care products such as sunscreen has not been properly studied. Our study aims to evaluate the reliability of specific IgY against influenza and the COVID-19 virus in a sample sunscreen product. Specific IgY influenza and COVID-19 viruses were inserted in the sample sunscreen at two concentrations of 0.1% and 0.25%. Three treatments were observed: control (C) sunscreen without IgY, treatment 1 (T1) sunscreen with 0.1% IgY, and treatment 2 (T2) sunscreen with 0.25% IgY. Organoleptic observations were carried out to monitor changes in aroma, color, and texture, and sunscreen sampling was done every week for 6 weeks. The durability of IgY was evaluated using an enzyme-linked immunosorbent assay (ELISA) and a neutralization assay. Organoleptic observation from weeks 1 to 6 showed consistency in its aroma, color, and texture. Enzyme-linked immunosorbent assay and neutralization assay (NA) results of the T1 and T2 groups showed negative results except for sample T1 at week 5, which showed a positive result in the Influenza A ELISA. Based on the results, it seems that IgY concentrations of 0.1% or 0.25% were not optimal. However, this negative result might be due to low concentration of the IgY and the presence of beeswax, which inhibits IgY and causes it to dissolve in distilled water, thus preventing it from being detected in the assay.
Keyword: Immunoglobulin Y, Sunscreen, Influenza, COVID-19, Biological Activity