Judul: Penentuan Jadwal Peremajaan Mesin Pertanian Di Perum Sang Hyang Seri, Sukabumi
Abstrak: Tujuan penelitian ini adalah untuk mempelajari faktor- faktor yang mempengaruhi kebijakan peremajaan mesin pertanian (Crawler Tractor D4D-SA, Wheel Tractor Deutz D 7206, Hotor Grader, Elevating Scraper dan Link Belt) dan menentukan jadwal peremajaan terbaik dengan meminimasi total biaya peremajaan. Komponen biaya yang terlibat dalam penentuan jadwal peremajaan mesin pertanian di Perum Sang Hyang Seri, Sukamandi adalah biaya penyusutan, biaya investasi, biaya bahan bakar solar, biaya suku cadang, biaya pembuatan suku cadang, biaya pelumas dan gemuk. Penyelesaian masalah peremajaan ini menggunakan teknik programa dinamis dengan memperhatikan faktor bunga. Jadwal peremajaan dibuat untuk jangka waktu 14 tahun terhitung mulai dari akhir tahun 1987 hingga akhir tahun. 2001. Hasil perhitungan menunjukkan bahwa Crawler Tractor Caterpillar D4D-SA yang dioperasikan sejak awal tahun 1975 diremajakan pada akhir tahun 1988 dengan Crawler Tractor Caterpillar D4E-SA. Kemudian Crawler Tractor Caterpillar ...
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Judul: Optimisasi Waktu Penggantian Komponen pada Mesin Produksi Benih Padi di PT Sang Hyang Seri
Abstrak: Key points in the maintenance of seed production machine is the analysis on economical machine lifetime, routine engine maintenance, spare parts replacement, and purchase a new machine. Such activities need to be analyzed can to produce a minimum of cost production. This study was conducted to observe the seed production process, analyze the critical level of the components on seed production machines, and to analyze the activities of maintenance and replacement of components on seed production machines. The research method is involving the identification of the seed production machines, i.e. kind of machines, need for engine power, engine speed, engine capacity, efficiency of the engine, and the maintenance history. Data were obtained from direct measurements in the field and on from the company's engine conditions records from 1991 to 2011. Data were analyzed with assessment of critical components (ECR) and optimization of time for component replacement (CoTR). The results showed that conveyors are the most critical components in the system of seed production machine maintenance. CoTR of the components are ranging from 0.87 to 3.14 years, and it can be implemented with scheduled replacement of 6 months, 1 year, 2 years and 4 years, respectively. There is also a need to improve the recording procedures of engine maintenance activities by PT Sang Hyang Seri which include the damage and the treatment carried out.
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Judul: Daya Tahan IgY Spesifik Terhadap Influenza dan COVID-19 dalam Balsam Bibir
Abstrak: Influenza and SARS-CoV-2 virus are respiratory infections and require antiviral medications due to severe consequences. Utilization of specific immunoglobulin Y (IgY) inserted in personal care products were developed. The aim of this study was to evaluate durability of specific IgY against influenza and COVID-19 in lipbalm. The concentration of IgY used in this research was 0.1% and 0.25%. Three groups were observed: control (C) lipbalm without IgY, treatment 1 (T1) lipbalm with 0.1% IgY and treatment 2 (T2) lipbalm with 0.25% IgY. Organoleptic tests were conducted and recorded which includes the sense of smell, colour and consistency for six weeks. The presence of IgY in lipbalm was evaluated using enzyme-linked-immunosorbent-assay (ELISA) and neutralizationassay. There were some noticeable changes of organoleptic that can be observed such as colour darkened and texture hardened of the lipbalm. Most of the assays gave negative results in T1 and T2, whilst only few of them were doubtful. Our result indicated that IgY concentration of 0.1% or 0.25% in lipbalm were not optimal. However, the negative result might be due to the unavailability of IgY in the product to be dissolved in deionized water since we used beeswax as lipbalm component.
Keyword: Covid-19, egg yolk immunoglobulin Y, lipbalm, influenza