Judul: Aplikasi 1-Methylcyclopropene untuk Meningkatkan Vase Life Bunga Potong Zingiber spectabile Griff. Silvana
Abstrak: The freshness of Zingiber spectabile Griff Silvana (bihip) as cut flowers must be maintained by the appropriate post-harvest treatment. One of the post-harvest technologies that is commonly used is the treatment of use chemicals 1-Methylcyclopropene (1-MCP). This study aims to extend the vase life of bihip flowers using 1-MCP, to gain optimum concentration of 1-MCP that can extend the vase life of bihip flowers, and to find the best application technique of 1-MCP for longest vase life of bihip flowers. This study used a completely randomized design (CRD) factorial with two factors. The first factor is the concentration of 1-MCP consists of five levels; 0 ppm (A0), 0.001 ppm (A1), 0.002 ppm (A2), 0.003 ppm (A3), and 0.004 ppm (A4). The second factor is application technique of 1-MCP consists of two levels : sprayed (B1) and soaked (B2). The results showed that 1-MCP can significantly extend the vase life of cut flowers bihip up to 11.30 day compared to control which is only 9.55 day. Concentration 0.004 ppm of 1-MCP was able to extend optimum vase life of cut flowers bihip until 11.30 day. Method 1-MCP application to efficiently extend until 11.10 day bihip flowers are soaking in a solution of 1-MCP. The combination treatment of 1-MCP to extend the vase life of flowers bihip that 1-MCP treatment concentration of 0.004 ppm by soaking treatment
Keyword: Silvana, Zingiber spectabile Griff, vase life, bihip, Aplikasi 1-Methylcyclopropene

Judul: Aplikasi 1-Methylcyclopropene untuk Meningkatkan Vase life Bunga Potong Tapeinochilos anannaceae K. Schum
Abstrak: The quality of Tapeinochilos anannaceae K. Schum (kasturi) as cut flower must be kept on freshness during the storage, so it needs to get a good post harvest treatment. One of the post harvest technology can be applied is 1- Methylcyclopropene (1-MCP). The position of flower at the storage can also affect the vase life of cut flowers. This experiments is aimed lengthen the vase life of kasturi cut flower by using 1-MCP, to get the optimum concentration of 1-MCP and to get the best storage position for prolonging the vase life of kasturi cut flower. The experiments was arranged in a randomized completely design with factorial pattern, consisted of two factors and ten replications. First factor was the concentration of 1-MCP, consisted of five levels: 0 ppm (A0), 0.1 ppm (A1), 0.2 ppm (A2), 0.3 ppm (A3), and 0.4 ppm (A4). The second factor was the storage in vertical and horizontal position. The results showed that application of 1-MCP can prolong the vase life of kasturi cut flower until 1.2-1.8 times compare without 1-MCP application. The combination of optimum treatment to extend vase life kasturi flowers cut is 1-MCP with 0.3 ppm concentration and stored in vertical position.
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Judul: Penghitungan Nilai Resistor Pengganti Menggunakan Nilai Eigen dan Vektor Eigen Ortonormal dari Matriks Laplace
Abstrak: Nilai resistor pengganti dapat dihitung dengan menggunakan nilai-nilai eigen dan vektor-vektor eigen ortonormal dari matriks Laplace yang diperoleh dari hubungan suatu gambar jaringan resistor dalam bentuk graf. Karena matriks Laplace adalah suatu matriks Hermite yang real dan simetrik, juga merupakan matriks semidefinit positif maka nilai-nilai eigen dari matriks Laplace adalah real taknegatif dan vektor-vektor eigennya adalah real yang saling ortogonal. Dalam tulisan karya ilmiah ini dibahas lima bentuk jaringan resistor (resistors network) yang hingga dalam bentuk graf : 1. Jaringan resistansi dua-simpul. 2. Jaringan satu dimensi dengan kondisi batas bebas. 3. Jaringan satu dimensi dengan kondisi batas periodik. 4. Jaringan dua dimensi dengan kondisi batas bebas. 5. Jaringan dua dimensi dengan kondisi batas silindrik.
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