Judul: Analisis Kebutuhan dan Kendala pada Pelaku Rantai Pasok Kentang Dieng dengan Metode Interpretive Structural Modeling
Abstrak: Potato (Solanum tuberosum L) is a horticultural product that can be used for diversification product as a substitute for rice. Dieng Plateau in Central Java is a center of potato production which contributes 23.63% of the national potato production. The purpose of this study is to identify and analyze the supply chain and identify key elements of the needs and constraints in the supply chain actors of Dieng potato. On this research, Interpretive Structural Modeling is used to explain the relationship between needs and constraints on the actors of supply chain. Potato supply chain that is based on final goal in general can be classified into three major flows, which are traditional market, modern market and manufacture industry. Farmer and combined farmers groups (Gapoktan) are two main actors that give most impact toward other actors, with needs infrastructure availability, training and credit helps for capital. The constraints of actors that cause other constraints are weather and climate that easily change and farmer capital that are limited
Keyword: supply chain, interpretive structural modeling, needs, constraints, actors

Judul: Tataniaga Kentang di Desa Sangiang, Kecamatan Banjaran, Kabupaten Majalengka, Jawa Barat
Abstrak: Potato is one of advantage commodities in Indonesia which has economic value. The high disparity of potato’s price between the farmer’s and the consumer’s level also the low price of potato at the farmer’s level may cause low farmer’s share. This research was aimed to analyze the institution, function and marketing distribution; identify the market structure; and to analyze the operational efficiency by marketing margin, farmer’s share and ratio of benefits to cost approach. Observation and interview were done toward the farmers in Sangiang village by using purposive sampling method and for the other marketing institution by using snowball sampling. There were five channels in potato marketing system with different functions and market structure. The result showed that the potato marketing system in Sangiang Village was not efficient, whereas the farmers still role as a price taker. Therefore, the government’s and instructor’s role are very important in empowering the farmers and the farmer’s group to solve the problem faced in potato marketing system in Sangiang Village.
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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