Judul: Analisis pendapatan dan faktor-faktor yang mempengaruhi produksi susu di Desa Pandesari Kecamatan Pujon Kabupaten Malang Jawa Timur
Abstrak: National dairy cattle business has low productivity and fluctuative production. It happened on 2005 until 2011. Dairy cattle business is dominated more than 90 percent inefficient small-scale of people farms with traditional maintenance. The condition shows that farmers also facing the limitations of production, management, and maintenance technology factors. In the process of goods or services production, income will be affected by the cost of resources and business management. Pujon Sub-district as dairy production center in East Java is expected can improve the welfare of farmers through their incomes from dairy cattle business. The purposes of this study are (1) to analyze the agribusiness management on dairy farm, (2) to analyze the factors that influence the milk production of dairy farmers (3) to analyze the income of dairy farm business. The used primary data was obtained by direct observation and questioner based interview, while the secondary data was obtained from government authorities and relevant institutions, literature, and related researches. The data was collected from September 2012 until January 2013 and was analyzed using descriptive analysis to examine the agribusiness management, income analysis using R/C ratio, and production function analysis using Cobb Douglas. The analysis result showed that the management of dairy farm has not been going well. It could be seen from the improperly of sanitation of the cage, untreated cows, late in milk handling that caused the low of milk fat content (< 2.70 percent), the unscheduled feeding, and the lack of SAE (Sinau Andandani Ekonomi) Cooperative role in supporting dairy farm business. Meanwhile, estimated model with Cobb Douglas production function showed the value of the coefficient of determination (R2) was 0.865. It showed that 86.50 percent of milk production could be explained simultaneously by input of feed concentrates, forages, labors, and gamblong feed (cassava dregs). The elasticity of each production factors was the coefficient degree of Cobb Douglas function. The elasticity of concentrates was 0.30, forages elasticity was 0.10, labor elasticity was 0.05, and gamblong elasticity was 0.46. The value of returns to scale could be calculated by summing the rank of the coefficient of each independent variable which was 0.91. It showed that milk production was in the condition of constant return to scale, which fit with the assumptions of Cobb Douglas. The average milk production was 12.26 liters per day with the average lactation time was 232.78 days per lactation period. The income consisted of milk selling, calves, heifer, cow manure, and used sacks. Selling price of milk during the year 2012 was stable at Rp 3 150 per liters, that the total income of farmers (with averagely business of 2.86 lactated cows) was at p 31 021 407.92, while the dairy cattle revenues was Rp 9 028 781.45. Cash R/C value was 1.54 which could be interpreted that every Rp 100 of cash cost used for business activities would give Rp 154 as income. The R/C value of total cost was 1.41, which could be interpreted that every Rp 100 of total cost used for business activities would give Rp 141 as income. From the terms of
Keyword: dairy farmers, R/C, Cobb Douglas production function

Judul: Hubungan antara Produksi dan Kualitas Susu Sapi Perah dengan Faktor yang Mempengaruhi (Studi Kasus di Pondok Ranggon, Jakarta Timur)
Abstrak: Dairy cows are the large ruminants that mostly kept by Indonesian dairy farmers. The dairy farms of Indonesia located not only in the villages, but also in the urban areas, such as Pondok Ranggon in East Jakarta. Recent study was done to observe effect of technical factors on milk production and quality of dairy farms in Pondok Ranggon in East Jakarta. The parameters were environmental conditions, feeding patterns, animal conditions, lactation performance, and milk quality. The data were analyzed using multiple regression analysis. To overcome less of roughage supply, farmers used agro-industry by products such as tofu waste, soybean waste, and rice bran. The averages of roughage, concentrate, tofu waste, soybean waste and rice bran that offered to the animals were 20,85±4,27; 0,67±0,73; 28,94±7,62; 2,26±4,51; and 0,01±0,09 kg/h/d, respectively. Under this feeding regime, the average milk produced was 9,28±3,22 kg/h/d. The averages of fat, lactose, protein, solid non fat, density of milk quality were 4,44%; 4,20%; 3,91%; 8,83%; and 1,032 g/ml. The relationship of milk production(Y) on roughage (X1), concentrate (X2), tofu waste (X3), soybean waste (X4) and rice bran (X5) was Y1=2,672X10,256 X20,014 X30,018 X4-0,008 X5-0,055. The influenced of age, number of lactation, lactation days, pregnancy and body weight on milk production and quality were also confirmed. It was concluded that maximum milk production in Pondok Ranggon was produced by the cows at 2,5 years age, in the first lactation, at the second months of lactation, from heavier cows, or in the non pregnant cows.
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Judul: Membran Komposit Kitosan-Nanopartikel Magnetik Fe3O4-Hidroksiapatit untuk Rekayasa Jaringan Tulang.
Abstrak: Composite membrane implants from biodegradable and biocompatible polymers such as chitosan, added with Fe3O4 magnetic nanoparticleshydroxyapatite (MHAP) is an alternative that is appropriate for bone tissue engineering. The MHAP was first synthesized using coprecipitation method with 3 different composition, with the ratio of Fe3O4 : hydroxyapatite is 3:7, 4:6, and 5:5 by mass. The composite membrane chitosan-MHAP (MK K-MHAP) was then synthesized by mixing a chitosan solution and the best MHAP composition (10, 20, 30, and 40% w/w of the mass of chitosan). Characterization using X-ray diffraction confirmed the formation of Fe3O4 and hydroxyapatite phase on the MHAP. The magnetic saturation value and size of Fe3O4 magnetic nanoparticles increase with the increasing Fe3O4 composition in MHAP and MK K-MHAP which characterized based on its magnetic hysteresis and particle size distribution curve, respectively. The morphology of the best composition of MHAP composite was analysed using transmission electron microscope. Molecular interactions in MK K-MHAP was characterized based on infrared spectra. Immersion test of MK K-MHAP showed optimum state at 30% mass MHAP composition in chitosan matrix with calcium concentration released about 1000 ppm within 144 hours.
Keyword: biomedical, chitosan, composite membrane, hydroxyapatite, magnetite