Judul: Pertumbuhan Anakan Kapur Tanduk (Dryobalanops lanceolata Burck.) pada Berbagai Tingkat Penutupan Kanopi di KHDTK Haurbentes, Jasinga
Abstrak: Deforestasi hutan telah berdampak pada produktivitas hutan terutama pada kelompok jenis komersial, seperti jenis Dipterocarpaceae sehingga perlu dilakukan upaya rehabilitasi untuk keberlanjutan produksi. Jenis Dryobalanops lanceolata Burck. merupakan salah satu jenis dari famili Dipterocarpaceae yang pertumbuhannya termasuk cepat yang dapat dijadikan pilihan jenis untuk rehabilitasi. Penelitian ini bertujuan menganalisis persentase penutupan kanopi yang baik untuk pertumbuhan anakan D.lanceolata. Penelitian ini menggunakan hubungan regresi antara diameter dan tinggi tanaman dengan persentase penutupan kanopinya. Persamaan dengan fungsi rasio merupakan model yang dapat menjelaskan hubungan paling baik antara pertumbuhan anakan D.lanceolata dengan penutupan kanopinya. Adanya penutupan kanopi sebesar 31% - 37 % mampu memberikan pertumbuhan tinggi antara 70.6-75.5 cm untuk anakan D.lanceolata dan penutupan kanopi sebesar 29% - 31% mampu memberikan pertumbuhan diameter antara 11.6-11.7 mm.
Keyword: deforestasi, Dryobalanops lanceoalata, penutupan kanopi, pertumbuhan, rehabilitasi

Judul: The Effect of Canopy on Growth of Dryobalanops lanceolata Burck. in The Age at KHDTK Haurbentes, Jasinga
Abstrak: Jenis-jenis Dipterocarpaceae menjadi andalan dalam produk-produk hasil hutan berupa kayu pertukangan. Upaya melestarikan jenis-jenis Dipterocarpaceae, maka Badan Penelitian dan Pengembangan telah membangun Hutan Tanaman koleksi Dipterocarpaceae seluas 60 ha di Kawasan Hutan Dengan Tujuan Khusus (KHDTK) Haurbentes, Kabupaten Bogor, Provinsi Jawa Barat. Penelitian ini bertujuan untuk mengetahui persentase tutupan tajuk yang optimal dan karakteristik lingkungan yang tepat untuk pertumbuhan D. lanceolata. Data primer didapat dengan melakukan pengukuran dan pengamatan terhadap pertumbuhan D. lanceolata berupa diameter setinggi dada, tinggi pohon, tingkat tutupan tajuk dan kondisi lingkungan (temperatur dan kelembaban). Data sekunder berupa data pertumbuhan awal saat D. lanceolata baru ditanam dan kondisi umum lokasi penelitian. Pertumbuhan diameter dan tinggi D. lanceolata dipengaruhi oleh tutupan tajuk namun memiliki korelasi yang rendah. D. lanceolata dapat tumbuh pada rentang persentase tutupan tajuk sebesar 40% - 65% dan akan tumbuh dengan optimal apabila persentase tutupan tajuk dibawah 65%., Dipterocarp species are the mainstay of forest products in the form of carpentry wood. In an effort to preserve the Dipterocarpaceae species, the Research and Development Agency had established a 60 ha collection of Dipterocarp Forest Plantation in forest area with special purpose (KHDTK) Haurbentes, Bogor Regency, West Java Province. This study aims to determine the percentage of optimal canopy cover and appropriate environmental characteristics for the growth of D. lanceolata. Furthermore, primary data were obtained by measuring and observing the growth of D. lanceolata in the form of diameter at breast height, tree height, canopy cover level and environmental conditions (temperature and humidity). Meanwhile, secondary data, which was in the form of initial growth data when D. lanceolata, was newly planted and the general condition of the study site. The growth of diameter and height of D. lanceolata was influenced by canopy cover but had a low correlation. In addition, D. lanceolata can grow in the canopy cover percentage range of 40% - 65% and it will grow optimally if the percentage of canopy cover is below 65%.
Keyword: canopy, diameter, Dryobalanops lanceolata, height, growth

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