Judul: Kultivasi Empat Isolat Jamur Tiram (Pleurotus) pada Substrat Sengon (Fa/cataria moluccana) dan Jabon (Anthocephalus cadamba) serta Analisis Komposisi Kimia Jamur.
Abstrak: One of alternative media for oyster mushroom (Pleurotus sp.) cultivation is using wood sawdust. This research was aimed to analize the potency of oyster mushroom cultivation using sawdust media from two species which are Sengon (Falcataria moluccana) and Jabon (Anthocephalus cadamba). The result showed that total wet mass of mushroom in the sengon baglog species code P. ostreatus var. Floridae TR was 47.7 g. Biology efficiency (BE) on the Sengon baglog coded P. ostreatus var. Floridae TR was higher than Jabon baglog coded EB with the same mushroom species. In this research, the weight of baglog media was 250 g with three repetitions. Jabon baglog has a potency as cultivation media for oyster mushroom so it could be utilized to subtitute Sengon baglog. Oyster mushroom is nutritions food containing protein more than 20% dry basis and functional carbohydrate (β-glucan more than 20%). The content of vitamin B3 in oyster mushroom was 282.28 mg/100g, while for vitamin D was not detected. The highest β-glucan content was in the oyster mushroom coded P. ostreatus var. Floridae TR 32.35 g/100g dried mushroom. β-Glucan in Pleurotus sp has been commonly used as a food suplement for prebiotic, anti-tumor, anti-oxidant, antiinflammation and imunomodulation.
Keyword: Cultivation, oyster mushroom, jabon substrate, sengon substrate, β- glukan

Judul: Growth and Production Of Oyster Mushroom (Pleurotus spp.) on Media Containing Sengon Wood, Coffee Skin, and Straw
Abstrak: Jamur tiram merupakan salah satu kelompok jamur kayu yang dapat dimakan (edible). Pemanfaatan limbah hasil kehutanan dan pertanian seperti serbuk gergaji kayu sengon, kulit kopi, dan jerami menjadi salah satu yang dapat dimanfaatkan sebagai media tanam dalam kultivasi jamur tiram guna memaksimalkan limbah yang ramah lingkungan. Penelitian bertujuan untuk menganalisis pengaruh media yang mengandung kayu sengon, kulit kopi, dan jerami terhadap pertumbuhan dan produksi jamur tiram. Penelitian menggunakan Rancangan Acak Lengkap (RAL) faktor tunggal dengan 3 perlakuan media yaitu formula 1 (kayu sengon dan kulit kopi), formula 2 (kayu sengon dan jerami), dan kontrol (kayu sengon). Hasil penelitian menunjukkan bahwa fase vegetatif jamur paling singkat diperoleh pada media formula 2 (15-18 hari). Fase generatif jamur yang membutuhkan waktu paling cepat masa panen diperoleh pada media kontrol (9-11 hari). Total bobot basah jamur terbesar dan nilai efisiensi biologis tertinggi diperoleh pada media kontrol (229,10 g) dengan nilai efisiensi biologis 79,0% pada jamur tiram putih (Pleurotus ostreatus) dan (331,70 g) pada jamur tiram cokelat (Pleurotus cystidiosus) dengan nilai efisiensi biologis 114,4%., Oyster mushroom is a group of edible wood mushrooms. Utilization of forestry and agricultural waste such as sawdust from sengon wood, coffee husks, and straw is one that can be used as a planting medium in oyster mushroom cultivation in order to maximize environmentally friendly waste. This study aims to analyze the effect of media containing sengon wood, coffee skin, and straw on the growth and production of oyster mushrooms. The study used a single factor completely randomized design (CRD) with 3 media treatments, namely formula 1 (sengon wood and coffee husk), formula 2 (sengon wood and straw), and control (sengon wood). The results showed that the shortest fungal vegetative phase was obtained in formula 2 media (15-18 days). The fungal generative phase wich required the fastest time to harvest was obtained in control media (9-11 days). The highest total wet weight of mushrooms and the highest biological efficiency value obtained on control media (229,10 g) with a biological efficiency value of 79,0% on white oyster mushroom (Pleurotus ostreatus) and (331,70 g) on brown oyster mushroom (Pleurotus cystidiosus) with a biological efficiency value of 114,4%.
Keyword: brown oyster mushroom, coffee husk, sengon wood, straw, white oyster mushroom.

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