Judul: Studi pembungaan, perkembangan buah dan perkecambahan biji nyamplung (Calophyllum inophyllum L.), suatu tanaman penghasil biodiesel
Abstrak: Nyamplung (Calophyllum inophyllum) merupakan tanaman tropis yang banyak dimanfaatkan secara tradisional oleh penduduk lokal seperti bahan bangunan, kayu bakar dan obat luar. Dalam penelitian ini dipelajari perkembangan bunga dan buah, menguji perkecambahan biji dan mengetahui kadar lemak pada biji. Dalam percobaan ini digunakan dua pohon yang telah berumur 11-12 tahun sebagai objek pengamatan. Pengamatan morfologi dan uji kecambah dilakukan di lapang, sedangkan pengamatan anatomi dengan pembuatan sediaan mikroskopis dan pengujian kadar lemak dengan menggunakan soklet dilakukan di laboratorium. Tunas memiliki 8-15 kuncup bunga. Bunga tersusun dalam tandan majemuk bertipe anak payung menggarpu, dengan 4 helai kelopak, 4 helai mahkota, satu putik dan 4 berkas benangsari yang mengelilingi putik, namun ditemukan bunga dengan 5 atau 3 helai kelopak dan 3 berkas benangsari. Buah berbentuk bulat, hijau dan jika sudah matang cenderung mengeras dengan kulit berwarna kecoklatan. Pertumbuhan tunas bunga hingga tunas memiliki kuncup siap mekar memerlukan waktu 27 hari setelah inisiasi (HSI). Tingkat kerontokan kuncup mencapai 48,52%, sedangkan pada bunga tingkat kerontokan mencapai 64,5 %. Secara umum P2 memiliki persentase kerontokan buah lebih besar dibanding P1. Bunga mekar terjadi selama 3 hari dan memasuki 4 hari setelah anthesis bagian-bagian bunga mulai rontok. Pertumbuhan buah dari kecil hingga matang rata-rata 8-10 minggu setelah anthesis (MSA). Biji dari pohon P2 memiliki kadar lemak sebesar 51,79%, lebih tinggi dibanding biji dari pohon P1 yang sebesar 42,57%. Perkecambahan biji pohon kedua juga lebih cepat dibanding dengan biji dari pohon pertama menandakan adanya variasi diantara kedua pohon tersebut.
Keyword: Biodiesel, Nyamplung, Calophyllum, Bogor Agricultural University

Judul: Analisa teknoekonomi pendirian industry biodiesel dari biji nyamplung (Calophyllum inophyllum L.)
Abstrak: World crises that occurred in the last decades caused the scarcity of fuel oil. During 2004 fuel oil consumption in Indonesia reached 26.9 billion liters, and in 2011 is estimated to reach more than 34.71 billion liters. Fuel consumption is not in line with fuel production, necessitating the development of alternatives energy. One of them is to use Nyamplung seed that is processed into biodiesel. Nyamplung (Calophyllum inophyllum L.) is a plant which commonly found around the coast. Nyamplung plant is one of the biodiesel alternative materials that have a large potential to be developed to overcome the problem of scarcity of fuel. The advantages of Nyamplung as raw material for biodiesel are the seeds have high rendement (approximately 70%) and its use does not compete with food purposes. The purpose of this study is to analyze techno-economic aspect of biodiesel industry establishment of Nyamplung seed. Scope of research includes techno-economic on the market and marketing aspects, technical and technological, management and organization, environmental, legal, valuation and commercialization, as well as financial aspects. This biodiesel industry is planned to be located in Banyuwangi with the selection criteria associated with using AHP (Analytical Hierarchy Process) and the industrial capacity of 1000 liters per day with raw materials as much as 4500 kg per day. After a deep assessment of all aspects, it can be concluded that the industry of biodiesel from Nyamplung seed is feasible to be realized.
Keyword: 

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
Keyword: