Judul: Ciri anatomi dan laju pengeringan alami tiga jenis kayu Cinnamomum:
Abstrak: Keberadaan jenis pohon kayu manis (Cinnamomum sp.) yang awalnya banyak tumbuh di hutan, dewasa ini sudah banyak di budidayakan pada lahan perkebunan dan pekarangan terutama untuk jenis C.burmanii. Pemanfaatan jenis Cinnamomun pada umumnya lebih menitikberatkna pada bagian kulit sementara bagian pohon lainnya untuk tujuan yang sama masih sangat terbatas kecuali pada C.Parthenoxylon. Di salah satu daeerah sentyar produk kayu mansi (Kabupaten Solok, Sumatera Barat), Kayu C.burmanii umumnya digunakan untuk keperluan kayu bakar, karena kayu ini cenderung cepat mengering dan mudah retak atau pecah.Penelitian ini bertujuan untuk mengetahui struktur anatomi serta besarnya laju pengeringan alami khususnya dari tiga jenis kayu Cinnamomum, yaitu C.burmanii, C.parthenoxylon, dan C.subarvenium.
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Judul: Anatomical characteristic and air drying rate of three Cinnamomum wood species.
Abstrak: Genus of Cinnamomum is well known enough as medicinal plant since it produces several active substances for many medicinal purposes. The bark, known as kulit kayu manis, and wood were extracted and utilized for food and pharmacy industries. Since the family consists of many species, wood identification as well as its drying rate should be examined well to proper utilization. Therefore, the aim of this research was to study the anatomical characteristic and drying rate of three Cinnamomum species, namely C. burmanii, C. parthenoxylon, and C. subavenium which were obtained from Solok (West Sumatera), Donggala (Central Sulawesi), and Maros (South Sulawesi). Wood and leaves were also collected as the sample. The wood then was utilized for anatomical and drying observations, while the remains for herbarium comparison. Both observations were carried out using the standard procedures. The result indicated that all species have similar wood characteristic such as brown to yellowish in colour; texture fine to rather fine; odoriferous while fresh; sapwood and heartwood indistinct; growth ring distinct; diffuse in porous; solitary and radial multiples of 2(-3) cells; simple perforation plates; intervessel pits alternate; oil and mucilage cells present. Specific character for each species as follow: vessel-ray pitting was much reduced to apparently simple; pits rounded or angular in C. burmanii; tyloses are absent in C. parthenoxylon; and in case of C. subavenium intervessel pittings are alternate, and the pits are polygonal in shape. Drying observation indicated that C. parthenoxylon wood is more easy to be dried with the rate of 5.14% per day compared to C. subavenium (2.55% per day) as well as C. burmanii (2.40% per day) from wet- to equilibrium conditions.
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Judul: Pengujian Virus Newcastle Disease Gen VII Isolat Lapang Sebagai Virus Standar Pada Uji Tantang Vaksin
Abstrak: This study was conducted to determine the standard of Newcastle disease virus Gene VII field isolate as a virus challenge to vaccine test. A virus suspension that has previously been tested by HA test then titrated with EID50 using 30 Specific Pathogen Free (SPF) of 10 day old chicken embryonated eggs. In addition, chicken lethal dose50 (CLD50) test were used to determine the virus titer that could cause 50% death of the chicken population. The CLD50 test was used 25 day-old-chickens (DOC) divided into 5 groups. The virus was diluted from 10-1 to 10-8. The 104 to 10-8 dilution of NDV was infected to every group of chicken via eyedrop and intranasal with 0.1 ml/chicken dosage. Haemagglutination test showed that the allantoic fluid were contain high titers of NDV is 512 HAU. The infective NDV that had been titrated by EID50 test showed the virus titers is 109 EID50/0.1 ml or 1010 EID50/ml and the virus titers of CLD50 test e.i 106.48 CLD50/0.1 ml or 107.48 CLD50/ml. These results can be concluded that the NDV Gene VII field isolates were most appropriate to be used as a standard virus to vaccine test
Keyword: Newcastle Disease Virus Gene VII, HA tes, EID50 test, CLD50 test