Judul: Performance of stand structure and soil compaction in residual stand of natural production forest
Abstrak: In management of natural forest vhose objective is sustainable production of wood, there is at present, a shift in paradigm of world forest management, from the previous paradigm which pursue ease of management to gain high productivity and uniform wood quality, to the new paradigm which pursue forest structure which approach as close as possible the structure of natural forest which occur or has ever occurred in that site (close to natural forest). For implementing this paradigm, there is a need for information on stand and soil at the same place and at the same forest management unit. Several previous researches have been conducted, but with partial approach. In this research there was assessment of stand structure and soil compaction at the same place in residual stand, and also assessment of the tendency to approach the condition of primary forest.
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Judul: Stand structure dynamic for forest yield regulation based on number of trees : case on a logged over area of a low and dry-land of tropical rain natural forest in Kalimantan
Abstrak: Differences in logging intensity, forest encroachment, and fires, caused the variability of natural forests condition, including their horizontal and vertical stand structures. Information on the variability of stand structure and dynamic of secondary forests is essential for projecting the future stand structure, which can be used to develop a forest management plan. The study, which used 101 permanent sample plots data established on a low and dry-land natural forest in Kalimantan, showed that there was an obvious variability of the stands condition after logging in terms of the number of trees ha-1 and horizontal stand structure. The variability of stand condition, time after logging, and environmental factors could result in variability of the components of stand structure dynamics (e.g., proportion of trees upgrowth and staying). This study aimed to develop models for estimating the dynamics of stand structure of logged-over natural forests, which used 75 permanent sample plots data of lowland and dryland of natural forests in Kalimantan. The proportions of trees upgrowth, staying (ai), and recruitment (bi) were obtained from 3-years growth data. Trees were classified into several 5-cm diameter classes and two species groups: dipterocarp and non-dipterocarp. This study tried to predict ai and bi by four methods. It showed that the proportion of trees upgrowth and staying of each species group could not be predicted satisfactory by three regression methods using the number of trees, stand basal area or time after logging and elevation that were used as independent variables in multiple linear regression models. The regression models produced overestimate and unrealistic projections of stand structures. In contrast, the projection of stand structures using the dynamics of stand structure’s components that were calculated using arithmetic mean was better performance than that of the three regression models. The simulation of stand structures also confirmed that the methods for calculating trees recruitment significantly affected the projected stand structures. The simulation of stand structure dynamics by using data from three sample plots showed that the different initial condition of stand (i.e. combination of trees number and stand structure) at the same harvesting intensity produced different cutting cycle as well. It was concluded that yield regulation of secondary forest should be determined specific to stand characteristics.
Keyword: permanent sample plot, stand structure projection, upgrowth, logged-over area, tropical natural forest, cutting cycle, logged-over natural forests, Forest Yield Regulation, low and dry-land, tropical rain natural forest, Kalimantan

Judul: Leukemia pada kucing
Abstrak: Leukemia pada kucing adalah suatu penyakit yang sangat patogen, disebabkan oleh sejenis virus. Virus ini dikenal sebagai Feline Leukemia Virus atau FeLV. FeLV ini oleh beberapa ahli dikatakan hanya bersifat ganas pada hewan kucing. Penularannya bisa secara horizontal maupun congenital. Kucing pada semua tingkat umur dapat terserang oleh FeLV ini. Khusus pada bentuk "thymic leukemia", virus ini hanya menyerang anak-anak kucing berumur diba- wah 1 tahun. Kucing-kucing liar atau yang tidak terpeli- hara jarang sekali terinfeksi FeLV. Selain dari serangan virus FeLV itu sendiri, maka penyakit leukemia ini bisa disebabkan oleh beberapa fak- tor yang sudah ada dalam tubuh hewan dan sangat menunjang perkembangan penyakit ini, yaitu antara lain tumor, agen toksik, cedera oleh kecelakaan dan gangguan hemopoiesis. FeLV menyerang sel-sel darah dalam tubuh hewan se- hingga pembentukan darah berjalan tidak normal. Terlihat sel-sel darah yang belum dewasa sudah beredar dalam sir- kulasi darah. Bentuk dan jumlahnya tidak lagi seimbang dalam tubuh hewan kucing tersebut. Gejala klinis antara lain kekurusan, ikterus, anemia, lemah, anoreksia, dyspnoe, sulit menelan, batuk, dan membran mukosa pucat. Selain itu kelenjar pertahanan tubuh juga membengkak, kemudian terjadi hepatomegali, spleenomegali dan pembengkakan pada ginjal. Terbentuk massa tumor pada beberapa tempat. Secara biopsy pada sumsum tulang akan terlihat be- berapa perubahan. Sumsum tulang berwarna merah tua atau abu-abu. Konsistensinya lunak dan terdapat banyak sekali memproduksi sel darah putih. Melalui gambaran darah leukemia ini lebih mudah didiagnosa. Jumlah retikulosit rendah sekali. PCV 8-15%, hemoglobin menurun, sel darah putih (WBC) meningkat, lim- fosit meningkat, Alfaglobulin juga ada peningkatan, dan banyak eosinofil yang belum dewasa beredar dalam darah…dst
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