Judul: Penyusunan Model Penduga Volume Optimal Batang Bebas Cabang Melalui Inventarisasi Kualitas Pohon dan Analisis Data Peubah Ganda (Studi Kasus untuk Jenis Meranti Merah di HPH PT ASIALOG Jambi)
Abstrak: Sistem pemungutan royalti merupakan salah satu perangkat kebijakan yang dapat dijadikan sebagai alat untuk mendorong peningkatan efesiensi pemanfaatan kayu di hutan.Tehnik perhitungan pada pemungutan royalti yang dilakukan setelah kayu keluar dari hutan dan cenderung hanya memperhatikan informasi kuantitatif potensi hutan menjadi hal yang tidak mendukung tujuan efesiensi pemanfaatan kayu. Untuk itu, tehnik perhitungan saat pohon masih berdiri di hutan dengan memperhatikan informasi kualitatif dan kuantitatif potensi hutan merupakan alternatif )rang selayaknya dipilih Dalam raugka mewujudkan hal tersebut diperlukan model penduga volume batang bebas cabang saat pohon berdiri, yang salah satunya dapat dihasilkan melalui tehnik inventarisasi kualitas pohon (tree quality inventory) analisis data peubah ganda (multivariate analysis).Penelitian ini bertujuan menggambarkan keeratan hubungan potensi optimal (volume) batang bebas cabang untuk pernanfaatan tertenlu terhadap beberapa peubah sifat kualitas pohon berdiri yang diuhur di hutan dari mendapatkan model matematis terbaik dari hubungan itu.
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Judul: Penyusunan Model Penduga Volume Batang Optimal Pohon Berdiri dengan Teknik Inventarisasi Kualitas (Studi Kasus untuk Jenis Mongifero foetido di Areal Kerja HPH PT. Asialog Propinsi Jambi)
Abstrak: The optimal use of tree volume of Mangifera foetida was predicted by some tree dimensions and tree quality characteristics that can influence quality of the wood producted . using the quality inventory technique. The predictor model of optimal use of tree volume was composed using the multivariate analysis.
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Judul: Durability of Specific Immunoglobulin (Ig) Y Againts Influenza and Covid-19 in Sunscreen
Abstrak: The benefit of specific immunoglobulin Y (Ig Y) as an active ingredient in personal care products such as sunscreen has not been properly studied. Our study aims to evaluate the reliability of specific IgY against influenza and the COVID-19 virus in a sample sunscreen product. Specific IgY influenza and COVID-19 viruses were inserted in the sample sunscreen at two concentrations of 0.1% and 0.25%. Three treatments were observed: control (C) sunscreen without IgY, treatment 1 (T1) sunscreen with 0.1% IgY, and treatment 2 (T2) sunscreen with 0.25% IgY. Organoleptic observations were carried out to monitor changes in aroma, color, and texture, and sunscreen sampling was done every week for 6 weeks. The durability of IgY was evaluated using an enzyme-linked immunosorbent assay (ELISA) and a neutralization assay. Organoleptic observation from weeks 1 to 6 showed consistency in its aroma, color, and texture. Enzyme-linked immunosorbent assay and neutralization assay (NA) results of the T1 and T2 groups showed negative results except for sample T1 at week 5, which showed a positive result in the Influenza A ELISA. Based on the results, it seems that IgY concentrations of 0.1% or 0.25% were not optimal. However, this negative result might be due to low concentration of the IgY and the presence of beeswax, which inhibits IgY and causes it to dissolve in distilled water, thus preventing it from being detected in the assay.
Keyword: Immunoglobulin Y, Sunscreen, Influenza, COVID-19, Biological Activity