Judul: Kajian Potensi Jasa Lingkungan (Biomassa dan Karbon) Hutan Mangrove Di Tanjung Bara, Sangatta Utara, Kalimantan Timur
Abstrak: Mangrove forest at Tanjung Bara which has area 841,8 ha (0,52% of forest total area at Sangatta Utara) had important roles to reduced carbon dioxide emission from operational activities of coal mining. This research has purposed to calculated the above-ground biomass and carbon of mangrove vegetation as enviromental services function to carbondioxide emission from operational activities of coal mining. The above-ground biomass of tree was calculated by allometric equation. Carbon storage was calculated with C=0,46% W (above ground biomass). Biomass and carbon of vegetation of seedlings and saplings were calculated through fixed carbon analysis. Result showed that the highly average biomass of mangrove vegetation of Tanjung Bara was 322,68 t/ha on Sonneratia zone. Carbon storage of mangrove vegetation at Tanjung Bara is 109,68 t C/ha or 402,53 t CO2/ha. Mangrove forest at Tanjung Bara given enviromental services potential about 14,34% to reduces carbondioxide emission from operational activities of coal mining.
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Judul: Kajian Pertumbuhan Cadangan Karbon Hutan Mangrove di Areal Kerja PT Bina Silva Nusa group
Abstrak: Pemanasan global merupakan peristiwa meningkatnya suhu bumi yang berkaitan dengan peningkatan GRK (Gas Rumah Kaca). Pengurangan gas rumah kaca terutama CO2 tidak hanya dicapai dengan mengurangi emisi dari aktifitas manusia tetapi juga meningkatkan penyerapan CO2. Penelitian ini bertujuan untuk menduga pertumbuhan cadangan karbon hutan mangrove yang berlokasi di areal kerja PT Bina Silva Nusa Group Kalimantan Barat. Plot penelitian dilakukan pada hutan bekas tebangan tahun 1989, 1998, 2002, 2006, 2008 dan 2009. Nilai cadangan karbon dihitung dengan cara menghitung biomassa menggunakan persamaan allometrik dan di konversi menjadi karbon. Data biomassa merupakan data yang diambil di lapangan pada tahun 2015 dan data penelitian sebelumnya yang dilakukan pada tahun 2013. Hasil penelitian menunjukkan bahwa nilai cadangan karbon mengalami peningkatan seiring dengan bertambahnya umur tegakan. Nilai cadangan terendah terdapat pada hutan mangrove berumur 6 tahun sedangkan nilai cadangan karbon terbesar terdapat pada hutan mangrove berumur 26 tahun. Cadangan karbon terbesar dimiliki oleh umur tertua dengan persamaan logaritmik y = 84.137 ln(x)-141.08 (dimana y adalah cadangan karbon dalam ton per ha dan x adalah umur hutan bekas tebangan)
Keyword: mangrove forest, biomass growth, carbon stock growth

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