Judul: Variasi ciri morfologi kutu tempurung hijau Coccus viridis (Green) (Homoptera: Coccidae) yang disebabkan oleh perbedaan tanaman inang
Abstrak: Tujuan penelitian ini untuk mengetahui variasi ciri morfologi luar kutu tempurung hijau pada tanaman kopi, jam bu batu, dan cengkeh, serta menyempurnakan deskripsi kutu tempurung hijau. Penelitian dilakukan antara bulan Oktober 1985 hingga Maret 1986 di tiga tempat, yaitu Cisarua pada ketinggian lebih kurang 650 meter di atas permukaan laut, Tajur pada ketinggian lebih kurang 300 meter di atas permukaan laut, dan Lentengagung pada ketinggian lebih kurang 50 meter di atas permukaan laut. Contoh kutu diambil dari tanaman kopi jenis robusta, jambu batu jenis lokal, dan cengkeh jenis Zanzibar. Masing-masing jenis tanaman dipilih secara acak sejumlah lima pohon tiap lokasi. Dari tiap pohon dipilih ..
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Judul: Analisis Keragaman Morfologi Koleksi Tanaman Kopi Arabika dan Robusta Balai Penelitian Tanaman Industri dan Penyegar Sukabumi
Abstrak: Coffee (Coffea sp.) is one of the plantation plant which have become commodities that counts in national income strengthening. This study aimed to identify and analyze the morphological diversity characters of arabica and robusta coffee genotypes collection in Sukabumi Industrial and Freshener Crops Research Institute. The experiment was conducted by characterization of 11 genotypes the coffee using a descriptors list which have been modified for the coffee plants. Most of the quantitative data were analyzed by analysis of covariance and others analyzed by analysis of variance. Qualitative and some of quantitative data were analyzed by analysis of quantitative data to get a dendogram clusters. The results of the morphological identification of arabica and robusta coffee plant showed some real differences between the genotypes both the variables that can be combined or can not be combined. The results of the dissimilarity relation dendogram shows the level of the coffee plant arabica and robusta coffee kinship approximately 0.45 (45%) of the observed variables. Robusta coffee has a higher level of similarity than arabica coffee.
Keyword: Bogor Agricultural University (IPB), genotypes, dendogram, covariance, clusters, characterization

Judul: Separation of Neodymium from U3Si2/Al Fuel Plate for Burn-Up Determination
Abstrak: Neodymium is a common fission product produced in nuclear fission reactions. Neodymium in this study was chosen as a burn-up indicator for U3Si2/Al fuel element plates because the neodymium isotope is a stable fission product with a fairly high yield. Some procedures were carried out to separate neodymium, starting with the separation of cesium isotopes (137Cs, 134Cs) through the precipitation method, then separation of uranium isotopes (235U, 238U) and plutonium isotopes (239Pu, 238Pu) with Dowex 1x8 ion exchange resin, and separation of neodymium (Nd), samarium (Sm), as well as cerium (Ce) with Dowex 1x4 ion exchange resin. The Cs recovery reached 99.95%. The U and Pu isotopes resulting from the separation are subjected to an electrodeposition process and the weight of each isotope can be measured with an alpha spectrometer. The separation results of Nd from Sm and Ce have been proven using an XRF spectrometer. The neodymium isotopes separation was corrected using the standard addition method, and an average total Nd content of 2.4 ppm was obtained in the PEB U3Si2/Al bottom solution. It is hoped that this separation method can be applied in determining burn-up of nuclear fuel.
Keyword: neodymium, burn-up indicator, U3Si2/Al fuel plate