Judul: Ekologi Vegetasi dan Etnobotani Kawasan Karst Gunung Cibodas, Ciampea, Bogor
Abstrak: Karst mengandung makna sebagai suatu bentang alam yang secara khusus berkembang pada batuan karbonat (batugamping), baik berkelompok maupun tunggal dibentuk dan dipengaruhi oleh proses pelarutan (karsitifikasi) yang derajatnya lebih tinggi dibanding kawasan batuan lainnya. Vegetasi yang hidup di kawasan karst sangat khas, baik dilihat dari segi bentuk dan komposisi jenisnya. Pepohonan yang hidup di kawasan karst biasanya kecil dan bertajuk jarang, perakaran dalam dan berkelok-kelok, serta menempel pada tebing-tebing. Hubungan timbal balik antara manusia dan lingkunganny adisebut etnobotani. Nilai keanekaragaman hayati bagi masyarakat dihitung berdasarkan nilai Index Cultural of Significance (ICS). Jenis yang dominan pada tingkat pohon adalah jenis Macaranga sp. (ki bolong), pada tingkat tiang adalah Prunus avium (ceri) dan Macaranga sp. (ki bolong). Pada tingkat pancang yang dominan adalah Piper aduncum (seuseurehan) dan Calliandra calothyrsus (kaliandra). Pada tingkat tumbuhan bawah yang dominan adalah Axonopus compresus (rumput teki) dan Imperata cylindrica (ilalang). Semakin tinggi nilai ICS menunjukkan semakin tinggi nilai pemanfaatannya dalam kehidupan masyarakat. Tumbuhan yang memiliki nilai ICS tertinggi yaitu kelapa dengan nilai sebesar 157.
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Judul: Komposisi Jenis dan Struktur Vegetasi pada Kawasan Karst Gunung Cibodas, Kecamatan Ciampea, Kabupaten Bogor.
Abstrak: Karst area is carbonated rock area that showing karst morphology, with high valued ecosystem of flora and fauna. One of the karst areas in West Java that has quite alarming condition is Gunung Cibodas, Ciampea subdistrict, Bogor regency. The purpose of the research is to analyze the composition and structure of vegetation in the karst area of Gunung Cibodas. The location of observation determined by systematic sampling with random start metode. Analysis vegetation plots are defined based on the direction of the slope and the mouth of the cave. The research found 30 species of seedlings, 32 species of saplings, 2 species of poles, 6 species of trees and 92 species of understorey vegetations. On the direction of the slope and the mouth of the cave is dominated by pioneer species such as Leucaena leucocephala, Calliandra calothyrsus and Macaranga peltata which show the process of secondary succession, moreover the understorey is dominated by the species of Invasive Alien Species (IAS). Stand structure inverted J-shaped curve can only be found on the northern slopes and generally canopy stratification in this karst area consists of three strata, namely stratum C, D and E with the dispersion pattern of this species of dominant groups in the direction of the slope and the mouth of the cave.
Keyword: stand structure, karst vegetation, composition of species

Judul: Evaluation of Influenza Antibody Titers in Serum and Egg Yolk of Layers Vaccinated with Influenza Vaccines.
Abstrak: Influenza belongs to the Orthomyxoviridae family which causes upper and lower respiratory tract infection. The aim of this study was to evaluate influenza-A specific antibody titers from serum and egg yolk of hens vaccinated with quadrivalent influenza vaccines. Three Hy-line Brown layers were vaccinated with quadrivalent influenza type A and B inactivated vaccines. Vaccination was carried out three times at a dose of 0.25 ml/chicken via the intramuscular route. The first vaccination was carried out at 24 weeks of age, then boosters were performed at 28 and 32 weeks of age. Serum and egg yolk were collected every week for 20 weeks since the first vaccination. Influenza A H3N2 and H1N1 antibody titers were determined using hemagglutination-inhibition (HI) test and agar-gel-precipitation (AGP) test. Influenza-A H3N2 and H1N1 specific antibodies were detected in both serum and egg yolk from the first to twenty weeks after the initial vaccination. Highest HI geometric mean titer (GMT) of H1N1 antibody reached 26.67 HIU at nine weeks post first vaccination (p.f.v), while H3N2 antibody reached 26 HIU at six weeks p.f.v. Our result showed that influenza antibodies can be produced in layers using quadrivalent vaccines and layer chickens are able to produce equivalent antibody levels for each influenza subtype.
Keyword: antibody, egg yolk, influenza, layer chickens, serum