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: Characteristics of Body Scrub Sargassum sp. Seaweed Salt Residue with the Addition of Turmeric Rhizome Powder
Abstrak: Residu garam rumput laut Sargassum sp. dapat berperan sebagai scrub alami yang diharapkan mampu menggantikan mikroplastik polyethylene. Penambahan bubuk rimpang kunyit berfungsi untuk meningkatkan nilai fungsi sediaan body srub, seperti aktivitas antioksidannya. Penelitian ini bertujuan menentukan penambahan konsentrasi bubuk rimpang kunyit (Curcuma longa) terbaik pada sediaan body scrub residu garam rumput laut Sargassum sp. 7% dengan karakteristik yang sesuai. Sediaan body scrub terbuat dari campuran bahan fase minyak dan bahan fase air dengan penambahan residu garam rumput laut Sargassum sp. 7% dan bubuk rimpang kunyit 0,5%, 1%, dan 1,5%. Produk sediaan body scrub terpilih yaitu SK 7:0,5 (kombinasi residu garam rumput laut Sargassum sp. 7% dan bubuk rimpang kunyit 0,5%) dan telah sesuai dengan acuan yang ditetapkan, kecuali uji daya sebar. Sediaan body scrub SK 7:0,5 memiliki nilai pH 6,52, waktu lekat 1,54 detik, diameter sebar 3,33 cm, emulsi yang stabil, homogen, mampu meningkatkan kelembaban kulit, total fenol 464,52 ± 12,67 mg GAE/g, aktivitas antioksidan CUPRAC 1,20 ± 0,003 μg/mL asam askorbat/g sampel dan ABTS dengan nilai IC50 195,99 ± 1,30 μg/mL., Sargassum sp. seaweed salt residue acts as a natrual scrub that is expected to replace polyethylene microplastics. The addition of turmeric rhizome powder serves to increase the functional value of body scrub, such as antioxidant activity. The aim of this research was to determine the best concentration of addition turmeric rhizome powder (Curcuma longa) to body scrub Sargassum sp. 7% with the best characteristics. The body scrub was producted from mixing oil and water phase material with the addition of Sargassum sp. seaweed salt residue 7% and turmeric rhizome powder 0.5%, 1%, and 1.5%. The body scrub product selected was SK 7:0.5 (a combination of Sargassum sp. seaweed salt residue 7% and turmeric rhizome powder 0.5%) and was in accordance with the established standards, except for spreadability test. The body scrub SK 7:0.5 had pH value 6.52, adhesion time 1.54 seconds, spread diameter 3.33 cm, stable emulsion, homogeneous, able to increase skin moisture, total phenol 464.52 ± 12.67 mg GAE /g, antioxidant activity of CUPRAC 1.20 ± 0.003 g/mL ascorbic acid/g sample and ABTS with IC50 value of 195.99 ± 1.30 g/mL.
Keyword: Antioxidant, microplastic, moisture, scrub

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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