Judul: Asosiasi Aktivitas Selulolitik dan Analisis Molekuler dengan Metode Rep-PCR dari Xanthomonas oryzae pv. oryzae
Abstrak: Xanthomonas oryzae pv. oryzae (Xoo) causes bacterial leaf blight (BLB) of rice. Twenty seven Xoo from several regions in Indonesia were tested cellulolytic activity with CMC media, molecular analysis were analyzed using the technique of Rep-PCR, and analyzed the association between the two by using the program Tassel. The purpose of this study is to investigate the association between cellulolytic activity and molecular analysist with Rep-PCR method from Xoo DNA bacteria. The results of cellulolytic activity from 27 isolates Xoo, 7624 isolate known as type IV has the largest clear zone is 1.43 cm and Xoo12-253 isolate has the smallest clear zone is 0.31 cm. For the molecular characteristics, used BOXA1R, (GTG)5, and ERIC primers to amplify genomic DNA and produces polymorphic Xoo DNA bands different between three primers. Most PIC value obtained by the ERIC primer with value 0.34. The results of testing the association of cellulolytic activity and molecular characteristics of DNA amplification by Rep-PCR were known that have a low correlation and no significant association between the two
Keyword: Bogor Agricultural University (IPB), Xanthomonas oryzae, Rep-PCR, molecular analysis, cellulolytic

Judul: Identifikasi Xanthomonas oryzae pv. oryzae dengan Teknik Biomolekuler dan Karakter Patogenitas terhadap Padi Galur Isogenik.
Abstrak: Increased production of paddy can face obstacle because the biotic stresses like bacterial leaf blight (BLB). The aim of this research to identification BLB caused by Xanthomonas oryzae pv oryzae (Xoo) by biomolecular technique using three primers specific Xoo through PCR colony, and to know virulence of Xoo isolates from West Java, West Sumatera, West Borneo by clip method for character of pathogenicity analysis using near-Isogenic lines and popular varieties. The purifying result were obtained 72 isolates namely 20 isolates from West Java, 30 isolates from West Sumatera, 22 isolates from West Borneo. Most of isolates were identified Xoo positive, except isolate Xoo11-023 from West Sumatera were identified Xoo negative. The character of pathogenicity showed that Code which contain resistant gene Xa4-Xa7 and IRBB5 which contain resistant gene xa5 were resistant to Xoo from all three areas. The average disease intensity on Code and IRBB5 of isolates from West Java was 1.62 % and 3.55%, West Sumatera was 2.10 % and 2.97 %, West Borneo was 2.17 % and 4.45 %. Isolate Xoo11-042 from West Sumatera was the one having highest virulence with average disease intensity on Code 3.29 % and IRBB5 6.90 % which classified as moderate resistant.
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Judul: Persamaan Gelombang Permukaan Dalam Sistem Hamiltonian
Abstrak: Fluida adalah suatu zat yang bentuknya dapat berubah secara kontinu akibat gaya geser. Dua bentuk fluida yang dikenal adalah fluida yang berbentuk cairan dan gas. Dalam tulisan ini akan dibahas fluida yang berbentuk cairan. Persamaan yang memodelkan fenomena gelombang fluida di antaranya adalah sistem Hamiltonian. Persamaan ini berasumsi babwa fluida dalam keadaan ideal di mana fluida tak mampu mampat (inkompresibel), fluida tak rotasional (irrotasional).
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