Judul: Hama dan Penyakit Jambu Air (Syzygium samarangense (Blume) Merr. & L.M. Perry) di Kabupaten Demak, Jawa Tengah.
Abstrak: Water apple is a fruit icon of Demak Regency. Pests and diseases are major problems in water apple cultivation. This research aims to inventory the main pests and diseases of water apple in Demak Regency, Central Java. Research was conducted in three steps: field observation and collection, species identification in the laboratory, and interview water apple farmers. Field observation was conducted in four water apple plantations in Bintoro district. Ten water apple trees were sampled diagonally from each plantation and observation was conducted on four twigs that were determinated based on cardinal direction: west, east, north, and south. Interview farmer was based on questionaire specially designed to reveal farmer’s identity, cultivation techniques, pests and diseases management in water apple plantation. There were some pests found such as spiralling white fly (Aleurodicus dispersus), white moth cicada (Sanurus indecora), fruit flies (Bactrocera albistrigata), leaf-roller weevils (Apoderus trinotatus), leaf borer (Lepidoptera: Gracillaridae), leaf folder (Lepidoptera: Tortricidae), and shoot roller (Lepidoptera: Tortricidae). The diseases were found such as red rust (Cephaleuros sp.), sooty mold (Capnodium sp.), pink disease (Corticium salmonicolor), and anthracnose (Gloeosporium sp.).
Keyword: Density, identification, inventory, plant damage, severity

Judul: Keefektifan Pembungkusan Buah Untuk Pengendalian Penyakit Antraknosa Dan Lalat Buah Pada Tanaman Jambu Air (Syzygium Samarangense)
Abstrak: Jambu air (Syzygium samarangense) merupakan buah yang memiliki kandungan air yang melimpah dan dapat dikonsumsi dalam bentuk buah segar. Masalah pada tanaman jambu air adalah adanya serangan hama dan penyakit. Penyakit yang paling sering menyerang buah jambu air adalah penyakit antraknosa dan hama yang menyebabkan busuk adalah lalat buah. Penelitian ini bertujuan untuk mengetahui pengaruh pembungkusan buah dan perawatan lahan terhadap perkembangan penyakit antraknosa dan lalat buah pada tanaman jambu air di Desa Betokan, Tempuran dan Bintoro, Kecamatan Bintoro, Kabupaten Demak. Pengujian menggunakan metode rancangan acak lengkap dua faktorial dengan enam perlakuan dan 10 ulangan. Analisis data menggunakan program SAS untuk Windows versi 9.1 dengan uji lanjut Duncan pada taraf 5%. Hasil dari penelitian ini yaitu pembungkusan dan perawatan lahan yang dilakukan pada keenam lahan tidak berpengaruh terhadap kejadian dan keparahan penyakit. Perawatan lahan yang dilakukan pada keenam lahan tidak berpengaruh terhadap tingkat serangan lalat buah, namun pembungkusan buah cukup efektif untuk mengendalikan serangan lalat buah.
Keyword: Bactrocera, cendawan, Demak, kejadian penyakit, keparahan penyakit.

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