Judul: Uji Keragaan Pepaya IPB 9 di Tiga Lokasi di Kabupaten Bogor
Abstrak: This research was aimed to study the morphology characters and fruit quality of population of papaya IPB 9 at three locations in Bogor regency. This research was done on October 2009 until March 2010 and the three locations of papaya are the in Tajur Experimental Field as a first location, the second location is Kampung Tali Kolot, Cimande, Caringin district, and the last location is Kampung Lengis, Warung Menteng village, Cijeruk district. The technique of collecting sample is using the Purposive Random Sampling method from population of observation has a commercial field. The sample is from three fields and each field is taken 30 sample trees and each tree is taken 2 hermaphrodite papayas. There are found some similarities and differences of morphology and quality of papaya IPB 9 that’s planted at three locations. The result of research showed that genotype IPB 9 was planted having same characters, except number leaf, petiole diameter, leaf length, leaf wide, length of veins of a leaf , steam circumference, length of fruit stalk , number of fruit. On the physical fruit quality, were significantly different for diameter lower end and middle of fruit, weight of fruit, hardness lower end of skin fruit, middle fruit flesh, tip fruit flesh, thickness of fruit flesh, weight of 100 seeds, weight of fruit flesh. On the chemical fruit quality, were significantly different for acidity titrrable. Whereas on hardness of skin fruit tip, middle of fruit flesh, vitamin C content, and water content on theree location not significantly differents
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Judul: Karakterisasi Morfologi Bunga, Buah dan Kualitas Buah Tiga Genotipe Pepaya Hibrida
Abstrak: This research was conducted from January-June 2012 at Teaching Farm Tajur and Postharvest Laboratory Baranang Siang, PKHT-IPB-Bogor. The objective of this research was to study the morphological characters of flowers, fruit, and fruit quality of three genotypes of hybrid papaya IPB H91, IPB H93, and IPB H39. The parameters were the qualitative and quantitative character of flowers and fruit, physical and chemical quality of fruit and organoleptic test. The result of the research showed that three genotypes of hybrid papaya had different superior characters. IPB H91 had long flower stalks, a high flower number per stem and fruits, high fruit flesh weight, edible portion, and flesh thickness, hard flesh firmness, and low total titrated acid. IPB H93 had many high flower number, low seed number per fruits and high total soluble solid. IPB H39 had short distance between the segment, hard fruit peel firmness and high vitamin C content. Organoleptic test showed that IPB H39 had shape and taste more preferred by panelist. IPB H91 can be alternative to get hybrid papaya because had more superior characters at generative phase than other genotype
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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