Judul: Identifikasi Tungau pada Famili Solanaceae di Kampus IPB Dramaga, Bogor
Abstrak: Keanekaragaman spesies Solanaceae yang cukup besar, memungkinkan keanekaragaman jenis parasit yang hidup pada tumbuhan tersebut juga besar. Salah satu parasit yang menginfestasi tumbuhan Solanaceae yaitu tungau. Penelitian ini bertujuan mengidentifikasi dan mempelajari tungau pada Solanaceae di Kampus IPB Dramaga, Bogor dan Sekitarnya. Bahan yang digunakan dalam penelitian ini adalah sampel tungau pada tumbuhan Solanaceae, yaitu Capsicum annuum, Capsicum frutescens, Capsicum sp., Solanum nigrum, dan Solanum torvum. Pada setiap tumbuhan diambil 10 helai daun secara acak untuk diambil tungaunya. Tungau diambil dari permukaan helai daun, dibuat preparat utuh dengan media PVA. Hasil identifikasi dari 70 sampel diperoleh tujuh jenis tungau yaitu tungau fitofag meliputi Tetranychus sp. dan Oligonychus sp., dan tungau predador meliputi Phytoseiulus sp., Amblyseius sp.1, Amblyseius sp.2, Amblyseius sp.3, dan Asca sp.. Keberadaan tungau predator berpotensi mengurangi jumlah tungau famili Tetranychidae yang menginfestasi Solanaceae.
Keyword: Ascidae, Phytoseiidae, Solanaceae, Tetranychidae, Tungau, Solanaceae plants, Capsicum frutescens, Capsicum sp, Solanum nigrum, Oligonychus sp

Judul: Keanekaragaman Serangga (Khususnya Parasitoid) Pada Pertanaman Cabai (Capsicum Annuum L.) Di Desa Taman Sari, Kecamatan Taman Sari, Kabupaten Bogor
Abstrak: Cabai (Capsicum annuum L.) merupakan salah satu komoditas sayuran asli Indonesia yang memiliki nilai ekonomi yang tinggi. Salah satu permasalahan yang sering terjadi ialah keberadaan hama dan penyakit. Pengetahuan mengenai hama dan musuh alami di lapangan sangat dibutuhkan untuk mengetahui cara pengendalian yang tepat. Penelitian ini bertujuan untuk mengetahui keanekaragaman serangga (khususnya parasitoid) pada pertanaman cabai di Desa Taman Sari, Kecamatan Taman Sari, Kabupaten Bogor. Pengamatan dan pengambilan sampel dilakukan di dalam pertanaman dan di sekeliling pertanaman. Pengambilan serangga dilakukan dengan menggunakan jaring serangga, selanjutnya dilakukan sortasi dengan menggunakan separator. Serangga hasil koleksi diidentifikasi hingga tingkat famili. Jumlah serangga yang berhasil dikoleksi sebanyak 1690 individu yang terdiri atas 8 ordo. Sebanyak 279 individu parasitoid berhasil dikoleksi, terdiri atas 15 famili, 11 famili di dalam pertanaman dan 15 famili di sekeliling pertanaman. Keanekaragaman serangga tertinggi ditemukan pada sekeliling pertanaman.
Keyword: Hymenoptera, jaring serangga, kelimpahan, koleksi, separator

Judul: Resonance technique HHO generator for internal combustion engine
Abstrak: Application of HHO gas as fuel had been generaly used. Though there was still controversy regarding its efficiency and efectiveness . In this research, hydrogen that hopefully could become an alternative renewable energy was produced by the electrolysis process. HHO was the mixture of hydrogen gas and oxygen gas that was formed in HHO dry generator. In HHO cell (dry) generator contained 10 cells, and each cell required 2.4 voltage. Furthermore, resonance DC application was evaluated to gain the better electrolysis efficiency. The test was held by using 2 level of electrolyte consentration, 0.178 M KOH and 0.446 M KOH. Each concentration was tested by 3 size of inductors, 8uH, 40uH, and 100uH. Not only single frequency was used, but modulatedfrequency was used also as well. In order to measure the improvement of resonance techinique application, specific energy was compared between using resonance technique and conventionaltechnique.Specific energy was calculated between output (mass of hydrogen) and input energy (watt hour). In this test,input of specific energy was measured in two condition:energy from the source (total) and energy in HHO generator only. From the test, it could be concluded that modulated frequency, by using40 Hz and 2405 Hz frequency, 100uH inductor, and 0.446 M OH, only 61% of total specific energy that was used in HHO generator. It needed23.91 watt hour energy (total) to produce 1 gram of hydrogen gas.On the other hand, the worst performance was happened in single frequency, 11270Hz, 8uH of inductor, and 0.178 KOH, where the loss of specific energy was 82%. The conventional technique only loosed about 0.5% of specific energy in 0.178 KOH needed 51.37watt hour to provide one gram of hydrogen. The loss was happened due to the excess of current that was converted into head in MOSFET. Hopefully the further research will be held again by using wet type of HHO generator because dry generator did not have fixed capacity value and it maked difficulty for calculating the perfect resonance condition.
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