Judul: Studi Morfometrik Perna Viridis Linnaeus 1758 di Muara Angke dan Pelabuhanratu
Abstrak: The water in North Jakarta is polluted water. This pollution affect the life of biotic in the water. Green mussel (Perna viridis) is one species that can live in that polluted water. Environment affect green mussel’s growth. The objective of present study is to compare the growth pattern and morphometric of Perna viridis in polluted area (Muara Angke) and less polluted area (Pelabuhanratu). This study used graphic analyse method to see the connection between each parameter. The results of this study proves there is morphometric difference in shell length with average for Muara Angke and Pelabuhanratu with value 54.14 mm and 49.94 mm, shell width with average for Muara Angke and Pelabuhanratu with value 25.86 mm and 24.77 mm , shell height with average for Muara Angke and Pelabuhanratu with value 17.5 mm and 14.74 mm , shell weight with average for Muara Angke and Pelabuhanratu with value 4.78 g and 3.52 g , shell length and shell weight ratio with average for Muara Angke and Pelabuhanratu with value 13.28 and 15.41 , shell length and shell width ratio with average for Muara Angke and Pelabuhanratu with value 2.11 and 2.02 , shell length and shell height ratio with average for Muara Angke and Pelabuhanratu with value 3.33 and 3.4, shell width and shell height ratio with average for Muara Angke and Pelabuhanratu with value 1.59 and 1.7, and condition index of Perna viridis with average for Muara Angke and Pelabuhanratu with value 12.14 and 12.98.
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Judul: Studi Patologi Kerang Hijau (Perna viridis) asal Muara Kamal, Teluk Jakarta
Abstrak: Green mussel (Perna viridis) is a filter feeder organism that is abundant in nature and have a long life span. The mussel have become a biologic indicator for environmental contamination. Pathological conditions caused by environmental contaminants and infections can be observed by staining the tissue section. The aim of this study was to observe histopathological finding of green mussel cultured at Muara Kamal, Jakarta Bay. Twenty one green mussels of various size and age were observed. The lesions found were degenerative lesions such as pigmentation and loss of epithelial cilia. These lesions were considered due to low heavy metals contamination since the measurement of Hg, Pb, and Cd level still in the normal range. Hemocytes infiltration observed in some tissue were thought as body defense reaction. The protozoan Nematopsis spp. infection were detected in gills lumina, connective tissue of mantle and within digestive tract.
Keyword: Bogor Agricultural University (IPB), Perna viridis, histopathology, green mussel

Judul: Sintesis Superkonduktor YBCO dengan Metode Evaporasi dan Karakterisasinya
Abstrak: Telah berhasil dibuat pelet superkonduktor YBCO-123 dengan metode evaporasi dengan menghasilkan Tc = 100 K. Sintesis dilakukan dengan mencampur garam-garam nitrat Y(NO3)2, Ba(NO3), Cu(NO3)2 di dalam pelarut H2O pada suhu 150 oC. Setelah melalui proses pirolisis pada 350 oC selama 1 jam, prekursor dikalsinasi pada 900 oC selama 4 jam kemudian serbuk dikompaksi dengan tekanan hidrolik 5 ton untuk membentuk pelet dengan diameter 1,5 cm dan tebal 0,24 mm. Sintering dilakukan pada suhu 940 oC selama 20 jam. Efek meissner menunjukkan fenomena levitasi pada temperatur sekitar 80 K. Hal ini menunjukkan fasa superkonduktor telah terbentuk. Data XRD memberi mengkonfirmasi bahwa fasa kristal 123 telah terbentuk. Nilai konduktivitas didapat dari hasil pengukuran dengan LCR pada temperatur 300 K sebesar 4 x 10-5 S/cm. Pada penurunan temperatur dari 100 K ke 80 K terjadi kenaikan nilai konduktansi yang tajam dari 4.2 x 10-4 S/cm ke nilai 1.309 x 10-1 S/cm.
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