Judul: Hubungan model arsitektur pohon roux jenis Koordersiodendron pinnatum Merr dan koriba jenis Pometia pinnata Forster terhadap parameter perimbangan air di hutan tanaman anggori Manokwari
Abstrak: Tree model architecture have an important role in water balance in forest lands. The pattern of growth and development of the tree produces a stem, branches and canopy that serves as the interception of rain water, produce organic material, and increase soil infiltration. The whole function is important in water storage in the forest. The research was conducted in Anggori Manokwari research plantations. Water balance parameters such as precipitation, throughfall, stem flow, soil moisture content, stem water content, and transpiration were measured on two tree species, Koordersiodendron pinnatum Merr and Pometia pinnata Forster.The results of Principal Component Analysis (PCA) showed a close relationship with the whole tree architecture model parameters of water balance. The same pattern of relationship shown by the two trees model architecture with parameters of rainfall, throughfall, and stem the flow. While the parameters of soil water content, stem water content, and transpiration showed a different relationship. Tree model architecture Roux K. pinnatum Merr, parameters of stem water content and transpiration have closer ties. Tree model architecture Koriba P.pinnata Forster, parameters of stem water content and soil moisture content has a closer relationship. These results illustrate that K. pinnatum Merr was higher to store water in the trunk, while P. pinnata Forster was higher to store water in the soil. Therefore, P. pinnata Forster is better to be planted in term of environmental management through water-soil-reserve relationships.
Keyword: 

Judul: Peran Model Arsitektur Rauh dan Nozeran terhadap Parameter  Konservasi Tanah dan Air di Hutan Pagerwojo, Tulungagung
Abstrak: Setiap model arsitektur pohon memiliki ciri khas dalam rangkaian proses pertumbuhan yang diwariskan secara genetik kepada keturunannya. Variasi model arsitektur pohon akan memberikan dampak bagi fungsi dan peran pohon tersebut dalam komunitas maupun dalam ekosistem secara keseluruhan. Salahsatu aspek yang terkait dengan peran penting pohon adalah mekanisme tranformasi air hujan yang berlangsung pada setiap pohon pada kawasan tersebut. Model arsitektur suatu pohon mempengaruhi besar aliran batang (stemflow) dan curahan tajuk (throughfall). Aliran batang dan curahan tajuk kemudian menghasilkan aliran permukaan, selanjutnya aliran permukaan mempengaruhi besar laju erosi. Besar presentase air hujan yang ditranformasikan ke permukaan tanah melalui aliran batang dan curahan tajuk ditentukan oleh ciri morfologi pohon secara keseluruhan. Perbedaan model arsitektur pohon menyebabkan variasi persentase curah hujan yang ditranformasikan menjadi aliran batang, curahan tajuk atau intersepsi selama hujan berlangsung atau dalam siklus hidrologi. Dalam mendukung upaya konservasi tanah dan air maka diperlukan penelitian untuk mengetahui keterkaitan model arsitektur pohon dengan konservasi tanah dan air untuk mendapat informasi memilih jenis tanaman yang di tanam pada lahan hutan, sehingga dapat mendukung usaha konservasi tanah dan air. Penelitian bertujuan untuk mengetahui besar aliran batang, curahan tajuk, infiltrasi, aliran permukaan dan erosi pada model arsitektur Rauh (Pinus merkusii) dan Nozeran (Theobroma cacao L) di Hutan Pagerwojo, Kabupaten Tulungagung.
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