Judul: Approach Grafting Technique on Kandel  Cultivars of Jackfruit (Artocarpus heterophyllus Lam.)
Abstrak: Teknik sambung susu merupakan teknik grafting dengan kondisi batang atas dan batang bawah dibiarkan tetap berada pada perakaran masing-masing, sehingga suplai hara menjadi lebih banyak. Nangka (Artocarpus heterophyllus Lam.) merupakan tanaman multiguna karena hampir seluruh bagian tanaman dapat dimanfaatkan, seperti buah muda, buah masak, bahkan kulit buah yang sudah menjadi limbah. Nangka kultivar Kandel memiliki keunggulan daging buah lebih tebal, tingkat kemanisan buah lebih tinggi, serta tekstur daging buah yang lebih krispi. Penelitian bertujuan mendapatkan informasi mengenai kompatibilitas batang atas (scion) dan batang bawah (rootstock) pada bibit nangka untuk pertumbuhan optimal hasil grafting. Penelitian menggunakan Rancangan Acak Lengkap (RAL) satu faktor dengan 3 taraf perlakuan berupa perbedaan umur batang bawah yaitu 3, 6, dan 9 BST, dengan masing-masing perlakuan terdapat 6 ulangan. Perbedaan umur batang bawah berpengaruh terhadap persentase kesegaran tanaman dan diameter batang bawah. Namun tidak terdapat perbedaan yang signifikan pada karakter agronomi batang atas dan diameter batang atas., Approach grafting is a grafting technique where the scion and rootstock are allowed to remain on their respective roots, so that the nutrient supply becomes greater. Jackfruit (Artocarpus heterophyllus Lam.) is a multipurpose plant because almost all parts of the plant can be used, such as young fruit, ripe fruit, and even fruit skin that has become waste. The Kandel jackfruit cultivar has the advantage of thicker flesh, a higher level of fruit sweetness, and a crisper flesh texture. The research aims to obtain information regarding the compatibility of scion and rootstock in jackfruit seedlings for optimal growth as a result of grafting. The research used a one-factor Completely Randomized Design (CRD) with 3 treatment levels in the form of differences in rootstock age, namely 3, 6 and 9 MAP, with 6 replications for each treatment. Differences in the age of the rootstock affect the percentage of plant freshness and the diameter of the rootstock. However, there were no significant differences in the agronomic characteristics of the scion and scion diameter.
Keyword: kompatibilitas, batang atas, batang bawah, umur bibit

Judul: Studi Keberhasilan Grafting Jati (Tectona grandis L.f)
Abstrak: Jati merupakan salah satu jenis kayu komersial yang banyak diminati. Jati yang unggul dapat dipertahankan dengan teknik vegetatif grafting. Salah satu kendala pada grafting yaitu inkompatibilitas batang atas (scion) dan batang bawah (rootstock). Oleh karena itu, diperlukan penentuan umur pohon induk, umur dan kondisi scion sebagai bahan grafting. Penelitian ini bertujuan menguji sumber scion terhadap keberhasilan grafting jati. Percobaan pertama menggunakan scion yang cenderung tua dan tidak diketahui umurnya. Percobaan kedua menggunakan scion berumur 8 hari. Percobaan ketiga menggunakan scion dari bibit Jati Plus Perhutani berumur 8 bulan. Penelitian dilakukan di Taman segitiga Departemen Silvikultur (DSVK) dan Rumah Kaca DSVK IPB pada bulan April hingga Juni 2022. Prosedur penelitian diawali dengan pemilihan rootstock, pemilihan scion, penyambungan, pemeliharaan, hingga analisis data. Penyambungan dilakukan dengan metode sambung sisip dan top cleft grafting pada percobaan pertama dan kedua. Percobaan ketiga hanya menggunakan metode top cleft grafting. Rancangan yang digunakan adalah RAL (rancangan acak lengkap) satu faktor dengan perlakuan A (teras rumah kaca) dan B (dalam rumah kaca). Data dianalisis dengan software SAS 9.0. Hasil penelitian menunjukkan percobaan pertama dan kedua mengalami kegagalan total. Adapun percobaan ketiga total persentase keberhasilan sebesar 20,84%., Superior teak can be maintained with vegetative grafting techniques. One of the obstacles to grafting is the incompatibility of scions and rootstocks. Therefore, it is necessary to determine the age of the seed trees, the age and condition of the scion as a grafting material. This study aims to test the source of scion against the success of teak grafting. The first experiment used a scion which tends to be old and its age is unknown. The second experiment used an 8-day-old scion. The third experiment used scion from 8-month-old Perhutani Jati Plus seedlings. The study was conducted in the Triangular Park of the Silviculture Department (DSVK) and the DSVK IPB Greenhouse in April to June 2022. The procedure begins with rootstock selection, scion selection, splicing, maintenance, and data analysis. Splicing is carried out by the method of connecting the insert and top cleft grafting in the first and second experiments. The third experiment used only the top cleft grafting method. The design used was a one-factor RAL (complete random design) with treatment A (greenhouse terrace) and B (in greenhouse). The data was analyzed with SAS 9.0 software. The results showed that the first and second experiments failed miserably aand third experiment, the total success percentage was 20.84%.
Keyword: grafting, jati, rootstock, scion

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