Judul: Pelabelan Komposit Pada Tree, Cycle, dan Graf Tangga.
Abstrak: Suatu Graf G dapat dikatakan memiliki pelabelan komposit jika graf tersebut memenuhi fungsi bijektif f:(V(G)UE(G))→{1,2,3,…,m+n} dan gcd⁡(f(uv),f(vw))≠1 dengan n adalah banyaknya verteks, m banyaknya sisi, dan u,v,w∈V(G). Graf yang memiliki pelabelan komposit disebut graf komposit. Dalam karya ilmiah ini, akan ditunjukan bahwa tree, cycle, dan graf tangga memiliki pelabelan komposit., A Graph G=(V(G),E(G)) can be said to have composite labeling if the graph fulfills the function of f:(V(G)UE(G))→{1,2,3,…,m+n} and gcd⁡(f(uv),f(vw))≠1 with order n, size m, and u,v,w∈V(G). A graph that admits composite labelling is know as a composite graph. This papper shows that the tree, cycle, and the ladder graph have composite labeling.
Keyword: Tree, cycle, Ladder graph, Composite Labeling

Judul: Pelabelan Super Edge-Magic dan Super Vertex-Antimagic pada Graf Kipas, Graf Matahari, Graf Ulat, dan Graf Prisma.
Abstrak: Pelabelan edge-magic dan vertex-antimagic pada suatu graf dengan banyaknya simpul dan banyaknya sisi adalah fungsi bijektif dari himpunan simpul digabung himpunan sisi yang dipasangkan ke himpunan bilangan bulat terurut 1,2, … , �� + �� , sedemikian sehingga semua bobot sisi mempunyai nilai yang sama dan semua bobot simpulnya mempunyai nilai yang berbeda. Pelabelan edge-magic dan vertex-antimagic yang memasangkan himpunan simpul ke himpunan bilangan bulat terurut 1,2, … , disebut pelabelan super. Dalam karya ilmiah ini, akan ditunjukkan bahwa graf kipas, graf matahari, graf ulat, dan graf prisma memiliki pelabelan super edge-magic dan super vertex-antimagic.
Keyword: graf kipas, graf matahari, graf prisma, graf ulat, pelabelan super edgemagic total, pelabelan super vertex-antimagic total, pelabelan total

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