Judul: Good Manufacturing Practices Assessment and Shelf-life Analysis of Chili Paste Mushroom in Chaiyo Farm
Abstrak: Mushroom as food product has big potential to be used. The nutritional content of mushroom that suitable for low energy diet and good source of protein become the reason of mushroom popularity. Schizophyllum commune has been known as one of edible mushroom that has functional properties. In Southern of Thailand, this mushroom becomes one of the famous food that been sold commercially with chili or curry paste seasoning. In this research, we assessed the Thailand’s GMP application of the producer. Besides that, this research also measured the shelf-life of chili paste mushroom product in room temperature and made a comparison with the addition of mixed preservative (propyl-parabens 500 ppm and calcium propionate 1000 ppm). From the GMP application, Chaiyo Farm as a producer still needs great numbers of improvement due to a lot of nonconformities. The longest shelf-life of product, chili paste mushroom, was estimated less than six days with addition of preservative at room temperature.
Keyword: GMP, calcium propionate, propyl-paraben, Schizophyllum commune

Judul: Pengemasan atmosfer termodifikasi pada jamur merang (Volvariella volvacea) blansir
Abstrak: Straw mushroom has a shelf life of 12 hours if left at room condition. This condition can be fixed by modified atmosphere packaging (MAP) application. The aim of this research was to obtain the best package design for modified atmosphere packaging of blanching straw mushroom. Before packaging, mushrooms treated blanching using hot water that serves to reduce the possibility of oxidation reactions. The addition of preservative aims to slow and inhibit the browning process of destructive microorganism, slow down, cover up or withhold the process of fermentation, putrefaction, acidification or other decomposition of destructive microorganism. Design of the package consisted of package size, number of perforation, and diameter of perforation. This research was also aimed to determine the best storage temperature. The parameters that observed during storage time were weight decrease, hardness, whiteness level, and the level of distortion. Each treatment had different perforation number and storage temperature. Perforation number that observered were 2, 4 and 8. Perforation diameter that used was 5 mm. While storage temperature that used were 5°C, 15°C, and 25°C. Each treatment made to twice repetition and stored for 14 days. The analysis done every 2 days. Every broken sample was not physically analyzed. During storage time weight, hardness, color, and quality decrease of straw mushroom is had happened thoroughly. Each package treatment had different effect on measured parameter. The result showed that package design of polypropylene plastic bag with 4 perforations and 5 mm perforation diameter that storaged in 15°C temperature was the best design to pack fresh straw mushroom. This package design was able to maintain mushroom quality for 10 days long, whereas other treatments were only able to maintain mushroom quality less than 10 days long. That package design was able to create optimum atmosphere compotition to pack mushroom so metabolism rate could be suppressed. Else, low storaging temperature could also suppressed metabolism rate as well as inhibited the growth of destructive microorganism. The result of mushroom measuring in that package at 10th day were weight decrease of 19:22%, hardness of 12.53 mm, whiteness level of 68.9, the level of damage by 38.49%. The damage indication that suffered by straw mushroom so it unable to consume were mushroom changed in color to brown, flabby and had decomposed smell.
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Judul: Rancang Bangun Mekanisme Penggetar Untuk Bajak Subsoil Getar Dengan Dua Bilah Bajak
Abstrak: Bajak subsoil merupakan alat pengolahan tanah pertama yang sering digunakan sebelum pembajakan dengan bajak singkal atau bajak piring untuk memecah lapisan keras di lapisan bawah. Alat ini biasanya digunakan pada tanah yang telah mengalamli pemadatan akibat lalu lintas traktor. Alat ini memiliki tahanan tarik yang tinggi dan biasa ditarik traktor empat roda
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