Judul: Keragaan Galur Sorgum (Sorghum bicolor (L.) Moench) di Tanah Masam Lampung Selatan
Abstrak: Penelitian ini bertujuan untuk memperoleh informasi tentang keragaan karakter agronomi dan komponen hasil galur-galur F8 sorgum, menguji daya hasil 17 galur F8 sorgum hasil persilangan varietas Numbu x UPCA S1 di tanah masam dan mengidentifikasi galur yang memiliki potensi hasil lebih baik dari tetuanya. Penelitian ini dilaksanakan bulan Maret sampai Agustus 2013 di Kebun Percobaan BPTP Lampung, Kecamatan Natar, Lampung Selatan. Bahan tanaman yang digunakan adalah 17 galur sorgum F8 hasil persilangan varietas Numbu sebagai tetua betina dan UPCA S1 sebagai tetua jantan. Hasil analisis ragam menunjukkan bahwa galur yang dievaluasi tidak berbeda nyata untuk umur panen dan bobot malai namun berbeda nyata untuk karakter diameter batang, jumlah daun, timur berbunga, bobot biji malai¹ dan bobot 1000 biji, serta berbeda sangat nyata untuk karakter tinggi tanaman dan panjang malai. Korelasi positif dan sangat nyata ditunjukkan oleh panjang malai dengan bobot biji malai dan bobot 1000 biji. Galur N/UP-4-8, N/UP-48-2, N/UP-118-7, N/UP139-1, N/UP-139-5, N/UP-159-9 dan N/UP-166-6 adalah galur yang memiliki bobot biji malai lebih besar daripada rata-rata galur evaluasi.
Keyword: Acid soil stress conditions, Sorghum, Aghronomic character

Judul: Keragaan Galur Sorgum (Sorghum bicolor (L.) Moench) di Tanah Masam Lampung Selatan
Abstrak: This study aims to obtain information on the performance of agronomic characters and yield components of sorghum F8 lines, to conduct yield trials of 17 F8 lines derived from a cross between Numbu x UPCA S1 in acid soils and to identify lines that have better yield than the parental lines. This study was conducted from March to August 2013 at the Experimental Field of BPTP Lampung, District Natar, South Lampung. The plant material used is 17 strain of sorghum varieties from crosses F8 Numbu as female parents and UPCA S1 as the male parent. The results of analysis of variance showed that the strain are not significantly different in harvesting time and weight of panicles but were significantly different to the character of stem diameter, number of leaves, flowering, seed / panicle weight and weight of 1000 seeds, as well as highly significant and a positive for plant height and panicle length. Positive correlation and highly significant was shown by panicle length with seed / panicle weight and weight of 1000 seeds. The N/UP-4-8, N/UP-48-2, N/UP-118-7, N/UP139-1, N/UP-139-5, N/UP-159-9 dan N/UP-166-6 strain are strain that have seedpanicle-1 weight larger than average strain evaluation
Keyword: yield components, sorghum, agronomic characters, acid soil stress conditions

Judul: Comparison of HIV Model with and without Time Delay
Abstrak: Acquired immunodeficiency syndrome (AIDS) is the reduction of the human immune system. AIDS is caused by human immunodeficiency virus (HIV). No medicine has been found for this desease until recently. An AIDS therapy is usually performed with highly active antiretroviral therapy, namely reverse transcriptase inhibitors, protease inhibitors and combination of both. Various models have been developed to explain the immune system of patients with AIDS, namely the HIV, response and the time delay model. This paper discusses the comparison between the dynamics of the HIV virus, the dynamic response of protease inhibitors and dynamics of time delay. The dynamics model of HIV is influenced by the level of white blood cells produced and the rate of its death. Dynamics of protease inhibitors on the response and the time delay model is influenced by the death rate of infected white blood cells and the failure rate of treatment.
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