Judul: Aplikasi bakteri Methylobacterium sp. terhadap  pertumbuhan dan perakaran tunas gaharu (Aquilaria malaccensis Lamk) hasil In-vitro
Abstrak: Aquilaria malaccensis is forest plant species that have substances of resin and economic valuable. For many people and industry, resin usually called "gaharu", used for medicine like stomachache drug, asphyxia, pregnant lasing and rheumatism; industrial raw material of parfume and cosmetic also complement of custom need. In technology progress and increasing of agarwood exploited make agarwood commodity has been decrease. So, by CITES its classified as one of the scare crop (Appendix II). Various method propagation had been conducted including breeder of vegetatif in-vitro culture (biotechnology) with it varioous modification treatment of griwth subtance regulator, condition of other growth factor and also environment bur rooting agarwood/gaharu still being one of many problems in this propagation method. Bacterium application of Methylobacterium sp. which have been reported to yield phytohormon or growth subtance regulator that needed for growth and development plant that hpefully can be one of alternative way to overcoming constraint in culture in-vitro . The aim of this research are to study the influence, to decide the strain and to decide the efective soaking time of Methylobacterium sp. for growth and rooting of Aquilaria malacceensis (gaharu) shoot
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Judul: Eksplorasi Peran Mikrob dan Status Hara Tanaman terhadap Pembentukan Gaharu pada Aquilaria malaccensis
Abstrak: Agarwood is known as one of non-timber forest commodity in the world. Agarwood has a lot of function such as raw material for perfume, incense, cosmetics, and medicine for some diseases. Indonesia has a good potential resource to produce agarwoods. At present, mechanism and processes of agarwood formation is not yet known exactly. There are three hypothesis in agarwood formation, that are 1) pathology hypothesis, 2) sliced dan pathology, and 3) non-pathology hypothesis. Meanwhile, ancient community used traditional system to stimulate agarwood formation by slicing, nailing, branch cutting, and peeling of stem rind. This research was done to know microbial effect and plant nutrition status in Aquilaria malaccensis and their correlation in agarwood formation. Chemical and biological analysis were used in this research. Chemical analysis was used to determine plant nutrition status. Meanwhile biological analysis was used to examine the microbes that caused agarwood formation. The result of this reseach showed that agarwood was formed either because of assosiation between microbes and Aquilaria malaccensis and slicing in that plant. The highest microbial population was found in branch protected by canopy. According to physiologic analysis, not all microbes in agarwood can dissolve cellulose and pectin. A high number of Agarwood was formed in plant with high N and Mn contents. Field trial showed that fungi were more potential than bacteria in agarwood formation
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Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf