Judul: Tabel volume lokal jenis keriung (Dipterocarpus cornutus Dyer) di pulau laut kalimantan selatan
Abstrak: Dalam rangka pengelolaan hutan diperlukan suatu rencana pengelolaan hutan yang baik, cermat dan terarah. Untuk keperluan tersebut, perlu dilakukan kegiatan inventarisasi hutan yang merupakan bagian dari kegiatan perencanaan hutan yang penting, karena data yang dihimpun akan menjadi dasar utama bagi usaha pengelolaan yang akan dilakukan. Agar kegiatan inventarisasi hutan dapat dilakukan dalam waktu cepat, praktis dan memiliki ketepatan dalam pendugaannya, maka diperlukan suatu perangkat pendugaan volume tegakanSalah satu dari perangkat ini berupa tabel. volume lokal. Tabel volume lokal (tarif volume) dihasilkan dari persamaan regresi hubungan antara diameter dan volume, mengingat pengukuran diameter yang lebih mudah, dibanding peubah penentu diameter lainnya. Persamaan regresi yang saat ini lazim dipergunakan adalah V = a Db (Fontaine, 1987). Namun bukan berarti bahwa persamaan regresi yang lain tidak mempunyai kesempatan untuk dipergunakan. Oleh karena itu perlu dilakukan pengujian untuk menentukan persamaan regresi yang mana yang lebih teliti/seksama sebagai model regresi yang akan dipergunakan dalam menyusun tabel volume. Penelitian ini dilakukan dengan tujuan untuk menge- tahui kesaksamaan beberapa persamaan regresi dan menyusun tabel volume lokal dari hasil persamaan regresi yang paling seksama tersebut untuk jenis Keruing (Dipterocarpus cornutus Dyer) yang tumbuh di Pulau Laut Kalimantan Selatan. PB Univer Data diambil dari hasil pengukuran Pusat Penelitian dan Pengembangan Hutan terhadap pohon jenis Keruing di Pulau Laut. Jumlah pohon yang diukur sebanyak 127 pohon model dengan kisaran diameter 20 cm 140 cm. - Penghitungan volume pohon-pohon model dilakukan dengan 5menggunakan rumus Brereton dan bukan Smalian, karena rumus Brereton lebih teliti dibanding dengan rumus Smalian. Hal ini telah dibuktikan secara teoritis oleh Suharlan dan Sudiono (1978)…dst
Keyword: 

Judul: Penyusunan Tabel Volume Lokal Jenis Keruing (Dipterocarpus spp.) di IUPHHK-HA PT. Sarmiento Parakantja Timber, Kalimantan Tengah
Abstrak: In order for the forest sustainability can be ensured, need to do a good forest management plan, careful and accurate information and reliable. The information needed is data about the potential of forest stands. Potential prediction of forest stands are related to the timber volume prediction. To collect such information, then the forest inventory of activities needs to be done. One of the tools to simplify and accelerate the activities of forest inventory is the volume table. Prediction tree stand volume by using the volume table will be more efficient and save costs and time. The purpose of this research is to develop a local volume table of keruing (Dipterocarpus spp.) in the area of IUPHHK-HA PT. Sarmiento Parakantja Timber, Central Kalimantan. The table volume made is table volume premises with diameter of trees as high as the chest (Dbh) as free variables. The preparation of a volume table is done using three models a regression equation with a diameter as free variables. A model of an equation probe volume was selected from third best model the regression equation is based on criteria test statistics in the preparation and validation model. The test criteria, namely the coefficient of determination (R2), standard deviation (s), diversity analysis, refraction, aggregate deviation (SA), average deviation (SR), the Root Mean Square Error (RMSE), and mean difference test chi-squared (χ2). Based on these criteria, the model equations estimators keruing (Dipterocarpus spp.) is a model equation Berkout V = 0, 0003631Dbh2, 26 with the value s = 0,059, R2 = 98,70%, Fhitung = 4875,51%, bias = 14,81%, SA = 0,03, SR = 11,04%, RMSE = 19,12,% and χ2 = 1,37.
Keyword: 

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