Judul: Simulasi Uji Baru, Unik, Seragam, dan Stabil (BUSS) Pisang (Musa spp.) di Kebun Percobaan Pasir Kuda, Bogor
Abstrak: The experiment was conducted to elucidate the characters of distinctness, uniformity and stability (nDUS) test for seven varieties of bananas and plantains that was ambon hijau (AHM), cavendish (CVS), kepok kuning (KKU), kepok unti sayang (KUS), pisang ungu (PUG), pisang lampung (PLP), and pisang mas kirana (PMK) that for simulating the nDUS test important for the plant variety protection right application. The experiment held at experimental field Pasir Kuda, Bogor. Data has been processed with model randomized completely design. The accession conducted in every part of plant, with the sub accession at pseudoterm stem, plant, leaf blade, peduncle, bunch, male inflorescence, rachis, and fruit that used test guidlines TG UPOV 123. The results showed that 50 different characters found from 52 characters in TG UPOV between candidate varieties and refernce variety. The difference could be expresed that the candidate varieties had distinctness character. The uniformity and stability was categorized when the candidate varieties have not off type character and the source for propagation was from vegetative. The distinctness or the differences used for getting the example varieties. The example varieties that used to make the next test guidlines.
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Judul: Simulasi Uji BUSS (Baru, Unik, Seragam, dan Stabil) pada Jambu Biji di Kebun Percobaan PKHT, Pasir Kuda, Bogor
Abstrak: This experiment was conducted to study the Distinctness, Uniformness, and Stability (DUS) of guava varieties, so that the data can be used to verify the Test Implementation Guidelines (PPU) in the DUS test. The experiment was conducted at PKHT experiment station, Pasir Kuda, Bogor. This experiment was conducted using a Complete Randomized Design, one factor with incomplete replications, based on UPOV guidelines. The guava varieties evaluated were Sukun Putih, Variegata, Mutiara, Getas Merah, Kristal, Bangkok, Seedless, Super Red and Sukun Merah. The DUS test simulation results showed that 35 of 40 characteristics were different, it consisting of 3 tree characteristic, 12 leaf characteristic, 3 flower characteristic, 15 fruit characteristic, and 2 recommended characteristic, so can be called as distinctness. The result also showed that no varieties with offtype, so can called as uniform and stabile. We conclude that the verification for the PPU of DUS test is appropriate and can be used for condition in Indonesia, with a few addition of new characters that not written in UPOV guidelines. The results of this research can also be useful to determine the variety of the samples.
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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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