Judul: Komposisi Jenis dan Struktur Tegakan Regenerasi Alami di Hutan Pendidikan Gunung Walat, Sukabumi
Abstrak: Natural regeneration is one of many factors which can change species composition and stand structure in Gunung Walat from time to time. The objective of this research is to analyze structure and species composition of vegetations on natural stand in Hutan Pendidikan Gunung Walat, Cibadak, Sukabumi. The location of observation determined by systematic sampling with random start method by using vegetation analysis plot on five strips. The research found 39 species of seedlings, 37 species of saplings, 22 species of poles, 23 species of trees and 21 species of understorey vegetation. Species composition in natural forest of HPGW is dominated by Tarenna fragrans and Bellucia axinanthera. Stand structure consists of stratum A, stratum B, stratum C and stratum E. Stratum A and B are dominated by species Maesopsis eminii while stratum C is dominated by Bellucia axinanthera and Schima wallichii. Stratum E is dominated by Selaginella wildenowii and Clidemia hirta. Tree density decrease exponentially from small diameter trees to large diameter trees which look like inverted J curve. This shows the sustainability of forest stand in the future will be secured.
Keyword: stand structure, species composition, natural forest

Judul: Struktur Tegakan dan Regenerasi Alami Hutan di Pulau Siberut, Sumatera Barat
Abstrak: Stand structure model is important to estimate the dimensions of forest because it can reduce work in the field. The purpose of this study was to determine the general equation stand structure, the status of biodiversity, and the ability of natural regeneration in virgin forest and other former logged over forests. Data was collected from forest stands represent virgin forest and various stand conditions after logging (1 year, 4 years, and 20 years). For each stand condition, plot lines 20 m x 500 m (1 ha) was made, each of the three plots and then identified tree species, measuring tree diameter ≥ 10 cm, measuring the level of regeneration, and mapping of the vertical stand structure. The result of research shows that negative exponential distribution model is the best model to describe stand structure in the virgin forest condition as well as in many former logged forest conditions. Family distribution model can be used for assessment of tree diameter distribution in various diameter class of dipterocarp, non-dipterocarp, and all species. Biodiversity index value is high (2,94 to 3,87 with index of Shannon and 0,027 to 0,122 with indeks of Simpson) that indicates the level of species diversity in the study area is high and the dominance is centered on a couple of species.
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Judul: Infeksi Virus Parainfluenza Pada Anjing
Abstrak: Virus parainfluenza anjing termasuk famili Paramyxoviridae, berbentuk pleomorf dengan ukuran bervariasi (bergaris tengah antara 100-500 nm), berpembungkus peka ether, berisi genom RNA dan secara serologis mempunyai kesamaan dengan virus SV-5 kera; dikenak sebagai salah satu kausa penting dari sindrom "kennel cough". Infeksinya dapat mengenai anjing semua umur yang belum pernah terinfeksi atau mendapatkan vaksinasi mengakibatkan gejala klinis ringan yang terbatas pada traktus respirasi atu infeksi yang secara klinis tidak memperlihatkan gejala nyata. Gejala klinis yang nampak setelah masa inkubasi (1-5 hari) terlewati berupa batuk yang tidak berat selama beberapa hari, berbagai tingkat tonsilitis dan pharyngitis dan kadang-kadang ditemukan kenaikan temperatur rektal antara 1-2 derajat C dari temperatur normal rat-rata. Anjing terinfeksi mengandung virus pada traktus respirasi bagian atas dan bawah serta limfonoduli sampai hari ke 9 setelah infeksi. Penyebaran virus antar anjing terjadi secara aerogen.
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