Judul: Kajian Perbandingan Struktur Anatomi Serta Sifat Pisis dan Sifat Mekanis Antara Kayu Jati (Tectona grandis L.f.) Unggul Dengan Kayu Jati Konvensional Pada Kelas Umur I.
Abstrak: Wood structure, and some important physical and mechanical properties of 3 years old tissue cultural teak wood (Tectona grandis L. f) were studied and compared to those of 3 and 8 years old conventional ones. All samples were obtained from one and close area in Semarang (Central Java). The result as follow: a) All wood samples studied were juvenile since wood density and fibers length are fluctuate and tend to increase from pith towards the bark, b) Both, 3 years old tissue cultural and conventional teak woods have no heartwood at the center nor the end of the stem, besides on their basal area (29.81% in tissue cultural teak wood, and 25.00% in conventional one). While, the basal and center area of 8 years old conventional teak wood consisting of 58.23% and 46.30% heartwood, respectively, c) Latewood portion in tissue cultural teak was lowest. Between early and latewood in this teak was unclear and was not distinguished well, d) Wood texture among the samples was moderate. The finest was found on tissue cultural teak and the roughest on the conventional 3 years old, e) Based on their average in wood density, specific gravity, modulus of elasticity and modulus of rupture, it can be said that quality of tissue cultural teak wood was similar to that of 3 years old conventional one, but much lower than that of 8 years old conventional teak wood. Even the stem diamter between 3 years tissue cultural teak wood and 8 years old conventional one was similar physically, it can be said that the quality of teak wood from tissue culture treatment studied is much lower than that of the conventional one. In fact, their anatomical characteristics (wood structure), or physical and mechanical properties were similar and were not significantly different to those of 3 years old conventional teak wood.
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Judul: Dimensi Serat, Sudut Mikrofibril dan Beberapa Sifat Fisis Kayu Jati (Tectona grandis) Umur 29 Tahun
Abstrak: The aim of this research was to evaluate wood quality of planted teak through its fiber morphology, microfibril angle (MFA), moisture content (MC) in green condition, density as well as specific gravity (SG). The sample tree was obtained from IPB campus area which was planted in 1985 without any silvicultural treatment. Fiber length was measured by Schluze-macerated fiber, while anatomical structure and the MFA were observed through thin-sliced specimen. MC, density and SG of wood were measured by gravimetric method. Result shows that anatomical structure of 29 year-old of teak studied was similar to that of teak in general. Average values of fiber length, MFA, MC in green condition, density and SG were 948.12 um, 32.8o, 58.93%, 0.78 g/cm3 and 0.48, respectively. The wood belongs to the strength class of III. Even though the mature woods were not produce yet, density and SG of wood of > 8 cm from the pith tended to increase.
Keyword: wood density, fiber length, MFA, Tectona grandis, teak

Judul: Penyebaran virus Newcastle-Disease (ND) pada burung liar
Abstrak: Banyak usaha yang telah dilakukan untuk mencegah dan mengendalikan terjadinya serangan wabah ND, seperti misalnya peningkatan sanitasi dan vaksinasi ND. Akan tetapi sam pai saat ini pengendaliannya belum dapat dilakukan secara tuntas. Banyak masalah yang menyebabkan kegagalan dari usaha untuk mengendalikan wabah ND, salah satu masalah yang perlu dipertimbangkan dalam penanggulangan wabah ND adalah sumber dan penyebaran virus ND oleh burung liar (Ronohardjo, 1980). Walaupun telah diketahui bahwa burung liar mempunyai peranan dalam penyebaran penyakit unggas, tetapi harus diakui bahwa sedikit sekali informasi mengenai jenis burung yang mempunyai potensi sebagai sumber dan penyebar virus ND. Selain menyebarkan penyakit unggas, burung liar juga dapat menyebarkan penyakit mammalia (Ottis and Bachmann, 1983). ...
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