Judul: Pengaruh pH, Penggoyangan Media dan Ekstrak Daun Sirih Merah (Piper crocatum Linn.) terhadap Rhizoctonia sp
Abstrak: Plant diseases is one of the factors inhibiting the increased production of seedlings in the nursery. Dieback is a disease that strikes one in the nursery. Dieback causes one of which is Rhizoctonia sp. This research used Completely Randomized Design (CRD) with three replications. The results showed that the higher the concentration of sirih merah leaf extract, the colony diameter growth Rhizoctonia sp. increasingly hampered. pH treatment on PDA (Potato Dextrose Agar) showed that isolates Rhizoctonia sp. did not grow at pH 2. PDB (Potato Dextrose Broth) treatment results obtained shakes highest mycelial dry weight at 100 rpm shake.
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Judul: Pengaruh macam Ph, dan penggoyangan media terhadap pertumbuhan cendawan, Rhizoctonia sp.
Abstrak: Salah satu kendala yang dihadapi sebuah pesemaian adalah penyakit hawar daun (Blight). Penyakit ini menyerang beberapa jenis bibit pada pesemaian Perhutani Pongpoklandak di Cianjur, Perum Perhutani Unit III Jawa Barat. Hasil identifikasi sampai tingkat genus di laboratorium menunjukkan spesies cendawan tersebut adalah Rhizoctonia sp. yaitu patogen lodoh yang berbahaya bagi pesemaian. Upaya-upaya pengendalian penyakit banyak diteliti dan dilakukan, berupa pengendalian secara fisik, kimiawi maupun secara biologi. Bagaimana cara menekan populasi patogen secara efektif masih perlu dipelajari untuk tiap jenis patogen. Penelitian ini bertujuan untuk mengkaji media tumbuh in vitro yang memberikan kondisi terbaik atau merugikan terhadap pertumbuhan cendawan Rhizoctonia sp. Selain itu untuk mengetahui pengaruh faktor fisik/lingkungan (in vitro), meliputi: 1) sumber karbon (nutrisi/karbohidrat) yang memberikan pertumbuhan terbaik bagi Rhizoctonia sp., 2) mengetahui toleransi terhadap derajat kemasaman dan menentukan selang pH untuk pertumbuhan optimum Rhizoctonia sp., serta 3) untuk mengetahui pengaruh penggoyangan media terhadap pertumbuhan cendawan Rhizoctonia sp. Penelitian ini dilaksanakan di Laboratorium Bioteknologi Kehutanan dan Laboratorium Rekayasa Bioproses PAU Bioteknologi Institut Pertanian Bogor, dalam jangka waktu Oktober 2003-Februari 2004. Objek yang digunakan adalah biakan murni Rhizoctonia sp., spiritus, alkohol 70%, NaOH 1%, HCl 1%, aquades, media PDA (Potato Dextrose Agar), media PSA (Potato Sucrose Agar), media PDL (Potato Dextrose Liquid) dan PSL (Potato Sucrose Liquid). Peralatan yang digunakan meliputi, erlenmeyer, boks isolasi (Laminar Air Flow), bunsen, cawan petri, otoclaf, shaker, cork borer, alumunium foil, plastic wrap, jarum ose, kertas saring, oven, timbangan analitik, mikroskop, gelas preparat dan penutup, kamera focus, pH meter, alat titrasi, serta software pengolah data.
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Judul: Pencarian Masjid Terdekat dengan Location Based Service (LBS) pada Android
Abstrak: When in a trip, a Muslim who wants to pray in the mosque timely, need the nearest mosque information. Such information can be provided through location based services (LBS). LBS consists of application components, component acquisition positions, mobile device, telecommunication networks, and service server. This research has successfully developed Android application that is able to provide the nearest mosque’s information and the mosque’s route on Google Maps. The application uses the acquisition component positioning using assisted global positioning system (A-GPS) in mobile devices. The mobile device used is a smart phone with Android operating system. Then, the telecommunications network uses global system for mobile communications (GSM) network or code division multiple access network (CDMA) network. Service server as content provider on the application is available through three Google API services: Google Maps API as the provider of maps, Google Place API as provider of mosque data, and Google Direction API as provider route to the mosque with the driving mode.
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