Judul: Rancang Bangun Hydraulic Scissor Lift pada Bucket Transporter Roda Enam (Fastrex 6WD).
Abstrak: Transporter Tandan Buah Segar (TBS) telah dikembangkan Institut Pertanian Bogor dengan alat bernama Transporter Roda Enam (AT6x6). Transporter ini dirancang dengan mekanisme bongkar muat TBS ke permukaan tanah di Tempat Pengumpulan Hasil (TPH). Namun demikian, saat ini sudah ada sistem pengangkutan TBS menggunakan bak/bin kontainer dari dump truck yang dapat diletakkan di permukaan tanah, sehingga perlu dikembangkan mekanisme bongkar muat TBS pada transporter agar dapat langsung masuk ke dalam bak/bin kontainer dump truck tersebut. Tujuan dari penelitian ini adalah merancang bangun hydraulic scissor lift pada mekanisme bongkar muat (unloading) transporter roda enam. Kriteria desain rancangan ini adalah kapasitas muatan sebesar 750 kg dan tinggi naik scissor lift melebihi tinggi minimum bak kontainer dump truck serta sudut kemiringan bak/bucket transporter melebihi sudut curah TBS. Penelitian ini akan dilakukan dengan pendekatan desain fungsional dan struktural yang terdiri dari beberapa tahapan, antara lain: identifikasi masalah, perumusan konsep desain, analisis teknik, gambar teknik, pembuatan prototipe, uji fungsional, dan uji kinerja. Desain mekanisme scissor lift dirancang menggunakan bantuan software Solidworks 2016. Hasil yang diperoleh setelah pengujian adalah rancangan mekanisme scissor lift mampu mengangkat bak/bucket transporter dengan ketinggian 1 550 mm dan telah melebihi tinggi bak kontainer dump truck. Beban maksimal yang mampu diangkat sebesar 821.8 kg. Waktu keseluruhan proses bongkar muat (unloading) adalah 26 detik. Sudut kemiringan bak/bucket transporter saat dumping sebesar 25.1o dan telah melebihi sudut curah (angle of repose) dari TBS yang menandakan muatan TBS dapat tumpah seluruhnya saat proses dumping.
Keyword: hidrolik, scissor lift, transporter roda enam

Judul: Rancang Bangun Sistem Hidrolik pada Mekanisme Bongkar Muatan Transporter Trek Kayu
Abstrak: In previous research (Rudiansyah 2012), designed Fresh Fruit Bunch (FFB) transporter that using wooden track to reduce the load on the ground with low bearing capacity of soil condition or land that has a steep slope. Unloading mechanism in previous research use sliding mechanism. In sliding mechanism, bucket is pushed in order to reach the tipping point so it can be raised by an operator who is next to the bucket. In this research, FFB dumping mechanism designed using hydraulic power. The addition of the hydraulic components are expected to reduce the workload of the operator and able to improve the transport capacity of the transporter. Hydrolic design is performed by CAD software. The result of the design are actuator cylinder having a diameter of piston is 32 mm and piston rod diameter is 20 mm, length of stroke is 205 mm with total overall length is 594 mm. Hydraulic gear pumps with 11 cc capacity used to support the performance of the system. The functional part that support the main functions are frame, tub, stand pumps, direction control valves and flow reducing valve, and hydraulic tank. Performance test results showed that the recommended load is 340 kg. The time it takes actuator to lift the tub (extrusion) when empty is 1.41 seconds, but while there is a load in the tub it takes 2.35 seconds.
Keyword: directional control valve, dumping, hydraulic system, transporter, wooden track

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