Judul: Combination effect of Atonic Growth Regulator with PES (Provasoli Enrich Seawater) on Eucheuma cottonii Seaweed Growth
Abstrak: Eucheuma cottonii is a type of seaweed that has been widely cultivated in Indonesia. The purpose of this study was to measure the effect of the combination of Atonic ZPT (Growth Regulator) and PES (Provasoli Enrich Seawater) media on the growth of Eucheuma cottonii explants. The research was carried out in April—May 2020, at the Seaweed Tissue Culture Laboratory at the Brackish Water Cultivation Fishery Center (BPBAP) Takalar, South Sulawesi. The study was designed using a completely randomized design (CRD) method with four treatments consisting of K (ZPT 0 ppm and PES 0%), A (ZPT 15 ppm and PES 1%), B (ZPT 15 ppm and PES 2%) and C (ZPT 15 ppm and PES 3%). The seaweed were Eucheuma cottonii from Laikang Village, Manggara Bombang District, Takalar Regency, South Sulawesi with an initial weight of 0.093 ± 0.008 grams and an initial length of 2.08 ± 0.01 cm. Study was carried out for 35 days and sampling was done once every 7 days. The results showed that the addition of a combination of 15 ppm atonic growth stimulant with 3% provasoli enriched seawater media on the culture medium could produce the highest survival rate and growth of Eucheuma cottonii seaweed explants that were better than the control or with the addition of 15 ppm Atonic ZPT and PES 1 %.
Keyword: Eucheuma cottonii, kultur jaringan, laju pertumbuhan, sintasan

Judul: Optimasi media kultur untuk induksi kalus dengan penambahan zat perangsang tumbuh pada kultur jaringan rumput laut Kappaphycus alvarezii (Doty)
Abstrak: The problem of seaweed seed quality deterioration that come from nature has become a major problem in seaweed farming. This can be handled by several techniques and one of them is tissue culture. The success of tissue culture to produce seeds through callus induction can not be separated from culture medium and plant growth regulator (PGR). In this study, we performed several combinations of plant growth regulator on two basic medium to get the best combination in callus induction. The combination of plant growth regulator BAP+IAA in Conway (CW) and Provasoli Enriched Seawater (PES) basic medium did not give the significant effect on the growth of callus. While in the PES medium, combination of plant growth regulator BAP+NAA gave the significant effect on the growth of callus but not in CW medium. The results of this study indicated that the concentration of BAP 1 mg / ℓand NAA 0 mg / ℓin PES medium was the best for callus growth.
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Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular