Judul: Pengaruh perbedaan jenis bibit dan perlakuan BAP pada fase peprbanyakan kultur jaringan terhadap keragaan populasi generasi kedua nenas queen di lapang
Abstrak: The aim of this research was analyzing the performance attain from various kinds of vegetative propagates and BAP previous treatment in in vitro to the second generation of pineapple in field-testing. This research was conducted in Tropical Fruit Research Center, Tajur, located at 400 m over sea level, 416 mm rainfall per month, and temperature was about 25-31 OC. Research started on May 2005 until August 2006. The design used was Factorial Randomized Complete Block Design with two factors. In the other hand, kinds of vegetative propagates was divided into three, ratoon, sucker, and crown. Each combination was repeated three times while for crown not repeated due to lack of supply. BAP treatment as a factor given in four levels, 0.5 mg4, 1 mg4, 2 mg4, and 4 mgll. BAP had given in in vifro multiplication stage. Total of material was 545 plants and observation brought about to 280 plants. A cultural activity such as fertilization, weeding, and pest controlled applied in certain times. Fertilization given in three times with different dosage. Weeding was done manually depend on the plantation's condition. Pest controlling executed to the plantation twice. Insecticide and rodenticide was the materials for controlling the pests. Variable observations included vegetative growth (plant diameter, plant height, leaf length, leaf width, and numbers of leaf), post-harvesting (numbers of leaf on peduncle, numbers of crown, peduncle length, fruit weight, crown weight, total weight of fiuit, fruit length, crown length, fiuit diameter, cup depth, edible portion, core width, acidity, and total soluble solid), and the numbers of vegetative propagates (ratoon, sucker, hapas, and slips). Observation on vegetative growth conducted 11 times at 2-13 month after planting. Post-harvesting observation had done directly after harvesting. The condition of plantation was good Several weed, pests, and diseases found with no significant effect to the plantation. The variation that occurred was the rapidity of flowering and harvesting time. From the observation concluded that BAP treatment affected leaf length and total weight of fruit. Different kinds of vegetative propagate affected total weight of fruit and cup depth.-This result considered good, because the BAP treatment gave no declining effect on cultivation in field. Therefore, that BAP considered not affecting on growth stability. Different kinds of vegetative propagate also gave no significant difference. In quality, fruits dominantly conical in shape.
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Judul: Pengaruh Benzylaminopurine (BAP) dan Air Kelapa terhadap Laju Multiplikasi Stek Batang Nenas (Ananas comosus L. Merr) Klon Pasir Kuda-1
Abstrak: The research aimed to study the effects of Benzyladeninepurine (BAP) and coconut water by induces producing shoots from mother stems of pineapple (Ananas comosus L. Merr). The research was used Pasir Kuda-1 clone as planting materials. It was conducted at Pasir Kuda Research Farm at Bogor Agricultural University from January to June 2010. Method of this research was based on a completely block randomized design, consisted of one factor and three repetitions. The factor was the BAP concentration (0, 25, 50, 100 ppm) and coconut water. The stems of mother plant were sliced and soaked in solution of BAP and coconut water, and then they were raised in a husk charcoal media for several weeks until the shoots force out from lateral buds. These shoots were maintained in a secondary nursery until they reach the transplanting maturity. The shoots begin force out from lateral bud after two weeks and allowed to grow on stem cuttings until it has enough size for transplanting in secondary nursery. The data were analyzed by F test and significantly different results were tested further using Duncan's Multiple Range Test (DMRT) at 5% level. Variables observed at seeding stage are percentage of life cuttings, percentage of cuttings sprouted up, and shoots per cutting, while in the seedling stage are shoot high, shoot weight, leaf length, leaf width, and number of leaves. Harvesting was done gradually by four times and made observations of the quality of shoots produced at each harvest. The result showed that the treatment of BAP concentration and coconut water did not significantly affect to all of variables in primary nursery, such as percentage of live cuttings, percentage of cuttings sprouted up, and shoots per cuttings. Treatment also did not significantly affect in secondary nursery, except the number of leaves on shoots that are harvested first at 6 weeks after transplantation. The repetition based on planting material had significant effect on shoot height, leaf length, number of leaf, and weight of shoots. Time of harvesting also affected the quality of shoots produced. Harvesting with good quality of shoots was able until 16 week after plant period. The number of shoots height, shoots weight, leaf width, leaf length and leaf number decreased while the shoots harvested after those period.
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Judul: Solusi Geometri Schwarzschild untuk Dimensi 4+1 dengan Invarian Rotasi Isotropik
Abstrak: Metrik Schwarzschild merupakan solusi eksak pertama dari persamaan medan Einstein dengan mangasumsikan metrik statik dan simetris. Metrik Schwarzschild yang ditemukan oleh Karl Schwarzschild masih dalam dimensi 3+1, namun seiring dengan teori-teori terbaru yang menunjukkan bahwa alam semesta tidak hanya di dimensi 3+1. Maka melalui penambahan dimensi, tujuan penelitian ini memperoleh solusi pada geometri Schwarzschild untuk dimensi 4+1 dengan memodifikasi koordinat bola yang invarian rotasi isotropik dan melalui penurunan rumus seperti koordinat bola, simbol Christoffel, dan tensor Ricci. Selain mendapatkan solusi ini, metrik Schwarzschild dimensi 4+1 dapat digunakan sebagai metrik dasar untuk memperoleh solusi blackhole dan wormhole pada dimensi 4+1. Hasil akhirnya, dengan memanfaatkan modifikasi koordinat bola, metrik Schwarzschild dapat dibentuk sehingga diperoleh solusi geometri Schwarzschild untuk dimensi 4+1.
Keyword: metrik Schwarzschild, persamaan medan Einstein, modifikasi koordinat bola, penambahan dimensi, invarian rotasi isotropik