Judul: Perencanaan rancangan dan tata letak saluran sistem drainase bawah tanah pada perkebunan tebu di lokasi pertkebunan Sei Semayang, PTP IX, Medan
Abstrak: Dari hasil penelitian ini, sistem yang digunakan dalam perencanaan sistem drainase bawah tanah adalah sistem "gridiron" dan pembuangan airnya dari saluran pembuang ke saluran utama tanpa menggunakan pompa. Pipa lateral yang digunakan untuk lahan tersebut adalah pipa kasar dengan kedalaman pemasangan pipa sedalam 150 cm dan waktu pembuangan kelebihan air dari zone perakaran selama 5 hari. Dimensi pipa lateral adalah sebagai berikut: diameter pipa 6 inchi dengan kapasitas lapang 7.313 liter per detik dan jarak antar saluran pipa lateral 12.39 meter.
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Judul: Perencanaan dan Perancangan Saluran Drainase Daerah Irigasi di Balai Besar Penelitian Tanaman Padi Subang, Jawa Barat.
Abstrak: Drainage is one of the technical actions to reduce excess water from rain water, seepage, or excess irrigation water on an area so it can function optimally. The purpose of this research are designing drainage channels, designing channels dimension, and modelling planned drainage channels. This research was conducted during months of February to May 2015 at BB Padi, Sukamandi, Subang. The stage of this research are depiction of topographic maps, determination the location of drainage channels, determination of runoff discharge design and drainage channel dimensions, planning sewers, evaluation the performance of drainage channel. Soil texture used i.e. sandy loam. The distance between the drainage channels were designed every 200 m in accordance with the draft consolidation using reference layout of rice fields in Japan. The direction of water flow leads to the North and South, with the main drainage, tertiary drainage, ii and Taman Burung Sukamandi as a downstream of the water flow. Rainfall distributions design with Gumbel method used for a 2 year period (76.25 mm). Stream runoff is planned in each plot. Channel drainage system construction with open channels are not resistant to erosion. The intersection between the channel and the JUT branch cause the need of culvert planning. The design of the channel dimensions made uniform in both the upper and lower channels to sewer plans Evaluation of channel plan performance assessment was done as a channel drain water runoff.
Keyword: drainage channel, Gumbel, land consolidation, rainfall

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