Judul: Karakteristik Body Scrub dari Residu Garam Ulva lactuca dengan Penambahan Bubuk Bengkuang (Pachyrhizus erosus)
Abstrak: Residu garam Ulva lactuca sebagai bahan alami dapat dimanfaatkan sebagai pembuatan krim lulur sehingga mampu menggantikan penggunaan mikroplastik polyethylene. Bubuk bengkuang memiliki aktivitas antioksidan yang berperan meningkatkan efektivitas krim lulur. Penelitian ini bertujuan menentukan penambahan konsentrasi bubuk bengkuang terbaik pada krim lulur residu garam Ulva lactuca 7% dengan karakteristik yang sesuai. Konsentrasi residu garam Ulva lactuca yang digunakan yaitu 7% dan konsentrasi bubuk bengkuang yaitu 1%, 3%, dan 5%. Penambahan konsentrasi bubuk bengkuang berpengaruh nyata (p<0,05) terhadap nilai sensori, pH, daya sebar, daya lekat, kelembaban, total fenol, dan antioksidan krim lulur. Produk krim lulur terbaik yaitu UB 7:5 (residu garam Ulva lactuca 7% dan bubuk bengkuang 5%). Krim lulur UB 7:5 menghasilkan daya lekat 2,8 detik, pH 6,55, diameter sebar 2,70 cm, kelembaban kulit 51,90%, emulsi stabil, homogen, total fenol 557,71±2,53 mg GAE/g, aktivitas antioksidan CUPRAC 1,20±0,0070 μg/mL Asam Askorbat/g sampel dan ABTS dengan nilai IC50 248,89±7,29 μg/mL., Ulva lactuca salt residue as a natural ingredient can be used as a body scrub so that it can replace the use of polyethylene microplastics. Jicama powder has antioxidant activity which plays a role in increasing the effectiveness of body scrub. This study aims to determine the best concentration of jicama powder in the body scrub with 7% Ulva lactuca salt residue with the appropriate characteristics. The residual concentration of Ulva lactuca salt used was 7% and the concentration of jicama powder was 1%, 3%, and 5%. The addition of the concentration of jicama powder had a significant effect (p<0.05) on the sensory values, pH, dispersion, adhesion, moisture, total phenol, and body scrub antioxidants. The best body scrub product is UB 7:5 (7% Ulva lactuca salt residue and 5% jicama powder). Body scrub UB 7:5 produces adhesion 2.8 seconds, pH 6.55, diameter spread 2.70 cm, skin moisture 51.90%, suspense stable, homogeneous, total phenol 557.71±2.53 mg GAE/ g, antioxidant activity of CUPRAC 1.20±0.0070 g/mL Ascorbic acid/g sample and ABTS with IC50 248.89±7.29 μg /mL.
Keyword: antioxidant, body scrub, Ulva lactuca, jicama powder

Judul: Characterization of Body Scrub Based on Sargassum polycystum Salt Residue, Moringa oleifera, and Collagen
Abstrak: Residu garam Sargassum polycystum dapat berperan sebagai scrub alami pengganti microbeads. Penambahan bubuk daun kelor dan kolagen dapat meningkatkan nilai fungsi body scrub terhadap kulit. Penelitian ini bertujuan menentukan konsentrasi bubuk daun kelor terbaik dalam pembuatan body scrub serta menentukan karakteristik produk body scrub terpilih dari residu garam rumput laut Sargassum polycystum, bubuk daun kelor, dan kolagen yang dibandingkan dengan produk body scrub komersil. Body scrub diformulasikan dengan 7% residu garam S.polycystum dan bubuk daun kelor konsentrasi 1%, 3% dan 5%. Formulasi terbaik ditambahkan dengan kolagen 0,5%. Body scrub dibuat dengan mencampurkan fase air dan fase minyak. Konsentrasi bubuk daun kelor terbaik didapatkan pada body scrub SK 7:1 (residu garam S. polycystum 7% dan bubuk daun kelor 1%). Body scrub terpilih yang ditambahkan 0,5% kolagen (SKK 7:1:0,5) telah sesuai dengan acuan yang ada. Body scrub SKK 7:1:0,5 menghasilkan nilai pH 6,45, viskositas 7716 cp, bersifat homogen, daya sebar 4,16 cm, emulsi stabil, kelembaban kulit 48,04% (sangat lembab), total fenol 0,77±0,06 mg GAE/g, dan aktivitas antioksidan CUPRAC 1,71±0,10 mg TE/g., Sargassum polycystum salt residue can act as a natural scrub substitute for microbeads. The addition of M.oleifera leaf powder and collagen can increase the value of the body scrub's function on the skin. This study aims to determine the best concentration of M.oleifera leaf powder in the making of body scrub and to determine the characteristics of selected body scrub products from S. polycystum salt residue, M.oleifera leaf powder, and collagen that are compared with commercial body scrub products. The body scrub was formulated with 7% residual salt of S. polycystum and M.oleifera leaf powder in concentrations of 1%, 3% and 5%. The best formulation was added with 0,5% collagen. Body scrubs were made by mixing the water phase and the oil phase. The best concentration of M.oleifera leaf powder was found in the body scrub SK 7:1 (7% S. polycystum salt residue and 1% M.oleifera leaf powder). The selected body scrub which added with 0,5% collagen (SKK 7:1:0,5) was in accordance with the existing reference. Body scrub SKK 7:1:0,5 produced a pH value of 6,45, viscosity of 7716 cp, homogeneous mixture, spreadability 4,16 cm, stable emulsion, skin moisture 48,04% (very moist), total phenol 0,77±0,06 mg GAE/g, and the antioxidant activity of CUPRAC 1,71±0,10 mg TE/g.
Keyword: antioksidan, daun kelor, emulsi, formula, kosmetik kulit, antioxidants, M.oleifera leaves, emulsions, formula, skin cosmetics

Judul: Asymptotic Distribution of Estimator for the Intensity Function of a Doubly Periodic Poisson Process
Abstrak: In this manuscript, estimation of the intensity function of a doubly periodic Poisson process is discussed. It is assumed that only a single realization of the Poisson process is observed in a bounded window [0,n]. It is also assumed that the period of the intensity function is known. The rate of consistency and asymptotic normality of the estimator are formulated. Finally, a confidence interval for the local intensity function is also formulated.
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