Judul: Respon Pertumbuhan Jamur Tiram Putih (Pleurotus ostreatus) Pada Dua Kondisi Suhu dan Kelembaban Berbeda
Abstrak: White oyster mushroom (Pleurotus ostreatus) is one of the popular mushroom that is cultivated by using the micro-climate control technology which is made in the mushroom house (kumbung), in the highlands, such as the one in Pandan Sari (437mdpl), and also like the one in the lowlands such as in Kukupu (169mdpl). Based on the observations that was held for 88 days in Pandan Sari, the average temperature measured in the incubating house was 27.4oC, while the average temperature measured in the cultivation house was 26.7oC. The relative humidity recorded in the incubation house was around 87% while the relative humidity recorded in the cultivation house was around 88%. Based on the 70-days observations in Kukupu, the average temperature measured in incubating house was 28.5°C, while the average temperature measured in the cultivation was 27.7oC. The relative humidity recorded in the incubation house was around 82%, while the relative humidity recorded in the cultivation house was around 86%. The accounted mycelial phase`s heat unit in Pandan Sari were 974.6 degree days, while the accounted heat units in Kukupu were 907.0 degree days. The accounted heat units of fruiting body formation phases in Pandan Sari were 652.9 degree days, while the accounted heat units in Kukupu were 494.3 degree days. The differences of heat unit value is quite high (6.9% coefficient of variation in mycelium phase and 24.3% in fruiting body formation phase) at both locations due to the observations that was held for every seven days so that the measured heat unit lost its resolution. The average daily temperature in Kukupu is higher than in Pandan Sari, this leads to faster development of oyster mushrooms in Kukupu rather than the ones in Pandan Sari. Faster development of oyster mushrooms in Kukupu resulted in lighter average weight than the ones cultivated in Pandan Sari
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Judul: Seleksi Isolat Jamur Tiram Putih (Pleurotus spp.) Berdasarkan Sifat Pertumbuhan dan Perkembangan
Abstrak: The research objective is a selection of isolates of white oyster mushrooms (Pleurotus spp.) based on characters of growth and development for obtaining excellent isolate and they can be used for breeding program. The materials were consisted of seven isolates of white oyster mushrooms from several source is AMD, MTR, BBR, PGN, USX, BNK, TBN, and CSR isolates. The works consisted of isolate maintenance, seed production, planting, harvesting, observation, data collection, and data analysis using SPSS 10.01 application program. Based on research results, USX isolate had the highest biological efficiency, MTR isolate had the fastest reproduction phase, BBR isolate had the highest weight of fruit body, BNK isolate had the highest number of fruit body and AMD isolate had the shortest vegetative phase and the shortest period of growth and development. The isolate which accomplished the criterias of selection was AMD isolate because it had a short period of growth and development, high biological efficiency value, produced the highest number of fruit bodies, also had diameter of fruit body suitable to criterias of consumer.
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Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular