Judul: Studi model struktur tegakan hutan tanaman pinus merkusii Jungh et de Vriese tanpa penjarangan di Hutan Pendidikan Gunung Walat
Abstrak: Forest stand condition is influenced by habitat condition, silvicultur treatments, age and genetic properties of trees, the interaction between each individual tree to habitat condition, and also interactions among individual trees. Effective influence of these factors will make a forest stands into the condition which very typical in any particular area. In essence, the forest stand condition may be known by looking at its stand structure. To explain the structural condition of stands, it can use family distribution models, such as the normal family distribution, lognormal, gamma, and negative exponential. This research aims to obtain the stands structure model of pine (Pinus merkusii Jungh et de Vriese) plantation forest on the family distribution, and analyze its curve skewness coefficient value. This research was conducted at Gunung Walat University Forest in August 2010. The data used were the tree diameter measurement on breast height of P. merkusii plantation forest which the age is unknown. The sample method is purposive line or strip sampling. The sensused plots were about 1 hectare with 500 m length path and 20 m wide path. The plots location was selected through purposive sampling method. In this research, five plots which were considered for representing the structure of forest stands at the sites would be taken. The results of research were conducted at Gunung Walat University Forest by using the maximum likelihood function shows that the family distribution model which was chosen as the best family distribution model for describing the stand structure of pine species and all species was the gamma family distribution, while for other species was the lognormal family distribution. Meanwhile, the skewness coefficient value which obtained tends on positive skewness, which means that curve is right skewed. The information of forest stand condition can be a suggestion to determine silviculture implementation, specially for thinning and felling, to get the expected forest stand condition.
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Judul: Struktur tegakan pasca penebangan pada sistem tebang pilih tanam jalur di konsesi hutan PT Erna Djuliawati
Abstrak: Forest harvesting causes the changes of forest ecosystem stability that can posses structure and species composition of forest stands. Stand structure is needed to show timber standing stock and describe stands regeneration ability. Stand structure can be described by the model of stand structure, there are family distribution and regression model. This research data was taken from the observation plot logged silviculture system of selective cutting and line planting of forest conditions based of post-logging at 12, 8, 6, 4, 2 years. This research aims to determine the model equations that can describe the timber standing stock in silviculture system of selective cutting and line planting and analyze the composition of the dominant species in natural regeneration. The results showed that the family distribution model of lognormal is the best model to describe the condition of stand structure in the area of PT Erna Djuliawati. The forest area has high preference of diversity index within species dominant at several species.
Keyword: Bogor Agricultural University (IPB), Silviculture System of Selective Cutting and Line Planting, Stand Structure Model, Family Distribution Model

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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