Judul: Keanekaragaman Laba-laba (Ordo Araneae) di Daerah Mangrove
Abstrak: Spider (Order Araneae, Phylum Arthropod) has high adaptation to different types of environments. Therefore, spider is a cosmopolitan animal due to their ability to live anywhere. The spider can be found in terrestrial, arboreal, and some aquatic habitat. One of the aquatic habitat is mangrove. In every ecosystem, spider is an important component in the food chain i.e. as a predator. Thus, this research was aimed to study the diversity of spider in the mangrove vegetation in Wildlife Reserve and Protected Forest of Muara Angke in Jakarta and the mangrove vegetation in Kolaka, Southeast Sulawesi. Spider was collected using sweeping and beating techniques on the transect lines in each species of mangroves. There were 21 families and 32 genus of spider in two different locations which were Wildlife Reserve and Protected Forest Muara Angke, Jakarta. The dominant families of Araneae in Wildlife Reserve and Protected Forest were Mimetidae, Tetragnathidae, Salticidae, and Oecobidae. Mimetidae has highest abundance from all of the spider families found. Among the four families above, two most dominant genera were existed, i.e. Mimetus and Tetragnatha. Two families of spider which were found in Kolaka were in five genera and the dominant family was Tetragnathidae. The dominant genera spiders in Sonneratia Rhizopora, and Avicennia were Mimetus, Tetragnatha, and Ebo, respectively.
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Judul: Keanekaragaman Serangga di Ekosistem Mangrove: Studi Kasus Hutan Mangrove di Kawasan Pesisir Angke Kapuk, Jakarta Utara
Abstrak: Mangrove is the habitat of various insects which have important function of ecosystem. However, many insect species and their functions in mangrove ecosystem have not been identified yet. This research is aimed to elucidate the species composition of mangrove in relation to the species diversity of insect. This research was conducted in three different mangrove stand in Mangrove Protection Forest of Angke Kapuk and Soedyatmo highway mangrove area. They are monoculture stand of A. marina, mixed stand of A. Marina and R. mucronata, and mixed stand of S. alba and R. mucronata. Sampling was collected by using line quadrat method. There were eight quadrats (10 m × 10 m) suspended at every mangrove stand. Incest traping was using yellow-pan trap method. The result indicates that the mixed stand A. Marina and R. mucronata has the highest value of insects abundance. The dominant insect at every mangrove stand were order of Diptera.
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Judul: Desain Instrumen Pengontrol Otomatis Pasteurisasi Susu
Abstrak: Pasteurisasi merupakan salah satu cara pengawetan ter- hadap susu segar sebelum disimpan pada suhu rendah atau langsung dikonsumsi. Caranya adalah dengan memanaskan sam- pai mencapai suhu minimal 62.8 atau 71.7 °C yang diperta- hankan tetap selama 1800 atau 15 detik. Kombinasi suhu dan waktu dapat dipilih sesuai dengan kemampuan alat. Makin tinggi suhu yang dipilih makin pendek waktunya. Melalui proses pasteurisasi, rasa dan aroma susu tidak berubah dan seluruh bakteri penyebab penyakit (bakteri pa- togen) musnah. Berdasarkan kombinasi suhu-waktu, pasterisasi susu di- bedakan atas tiga metoda, yaitu metoda waktu lama (long hold), temperatur tinggi waktu pendek (HTST) dan temperatur tinggi (UHT). Suhu pasteurisasi dengan metoda waktu lama minimal 62.8 °C yang dipertahankan tetap selama paling se- dikit 1800 detik. Sedang HTST suhu minimalnya adalah 71.7 °C dengan waktu 15 detik atau lebih lama. Pada UHT waktu yang diperlukan adalah dua detik atau lebih singkat dengan suhu 87.8 - 132.2 °C. Pemakaian kombinasi suhu-waktu yang melebih dari ke- tentuan minimalnya akan mempengaruhi rasa, aroma, komposisi ...
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