Judul: Profil Kandunga Karbon pada Tegakan Puspa (Schima wallichii Korth)
Abstrak: Schina represents one of vegetation type in the forest ecosystem growing at HTI PT. Musi Hutan Persada, South Sumatera.
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Judul: Composition and Stand Structure of Puspa (Schima wallichii (DC.) Korth. in Mount Halimun Salak National Park, Sukabumi
Abstrak: Puspa termasuk salah satu jenis tumbuhan dataran tinggi yang mampu tumbuh di lahan kritis, sehingga dapat digunakan untuk memulihkan area hutan pegunungan yang rusak. Penelitian ini bertujuan untuk menganalisis komposisi jenis, struktur tegakan Schima wallichii (DC.) Korth. dan aspek biofisik tegakan Schima wallichii (DC.) Korth. di zona inti TNGHS. Metode penelitian ini menggunakan analisis vegetasi dengan plot yang ditempatkan secara purposive sampling. Hasil penelitian menunjukkan bahwa komposisi jenis memiliki kerapatan tinggi sampai rendah berturut-turut dari semai sampai pohon. Keseluruhan plot pada lokasi penelitian didominasi oleh Schima wallichii (DC.) Korth. Struktur tegakan hutan pada seluruh plot menunjukkan pola hubungan jumlah pohon dengan kelas diameter membentuk kurva membentuk “J” terbalik (eksponen negatif). Sebaran puspa dalam plot penelitian menunjukkan sebaran mengelompok. Hal tersebut berdampak baik untuk proses regenerasi alami. Seluruh aspek biofisik yang diukur pada plot penelitian relatif seragam., Puspa is one of the highland plant species that can grow on critical land, so it can be used to restore damaged mountain forests. This study aims to analyze the species composition, stand structure of Schima wallichii (DC.) Korth. and biophysical aspects of Schima wallichii (DC.) Korth. stands in the core zone of TNGHS. This research method uses vegetation analysis with plots placed by purposive sampling. The results showed that the species composition had high to low density from seedling to tree, respectively. The entire plot at the research site was dominated by Schima wallichii (DC.) Korth. The structure of forest stands in all plots showed a pattern of relationship between the number of trees and diameter class forming an inverted "J" curve (negative exponent). The distribution of puspa in the research plot shows a clustered distribution. This has a good impact on the natural regeneration process. All biophysical aspects measured in the research plots were relatively uniform.
Keyword: puspa, regeneration, TNGHS, vegetation analysis

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