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: Analisis Sistem Tataniaga Mentimun di Desa Laladon, Kecamatan Ciomas, Kabupaten Bogor
Abstrak: Cucumber is one of the prime commodities in Indonesia. The fluctuating price of cucumber and high marketing margin between received price by farmers and price which is paid by consumers make the received farmer's share by farmers is relatively small. The purpose of this research is to identify the channels and marketing functions, market structure and conduct of marketing institutions, and to analyze the efficiency of marketing channels of cucumber based on marketing marjin, farmer's share, and the ratio of benefits to costs. The data were collected by observation and interview to farmers in Laladon village, Subdistrick Ciomas, Bogor Regency. The result of research stated that there were three marketing channels formed with different functions, different institutions, and different market structure on every channel. The analysis of the marketing efficiency concluded that marketing channel III is the most efficient channel because it has the lowest marketing marjin, highest farmer's share, and highest ratio of benefits to costs.
Keyword: system, marketing, Laladon village, efficiency, Cucumber

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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