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"Xanton merupakan senyawa antioksidan yang terdapat dalam kulit buah manggis (Garcinia mangostana L.) dan penelitian ini digunakan metode peredaman DPPH untuk mengetahui nilai IC50 dari ekstrak etanol kulit buah manggis dan sediaan krim. Penelitian ini bertujuan untuk mengetahui stabilitas fisik, aktivitas antioksidan dan pengaruh perubahan konsentrasi dimetikon dan siklometikon terhadap penetrasi ekstrak etanol kulit buah manggis (Garcinia mangostana L.) pada sediaan krim antikerut. Formulasi topikal dengan penambahan silikon dalam basis terbukti mampu mempertahankan kontak zat aktif dengan kulit dan mencegah hilangnya zat aktif karena proses abrasi. Semua formulasi yang di buat di uji daya penetrasinya secara in vitro dengan sel difusi Franz menggunakan membran abdomen tikus betina galur Sprague dawley. Nilai aktivitas antioksidan (IC50)terbaik ada pada formula C2 yaitu 4442,8 ppm. Jumlah kumulatif xanton yang terpenetrasi dari krim yang tidak mengandung silikon adalah 436,19±59,85 μg/cm² (A), sedangkan krim yang mengandung silikon secara berturut-turut adalah 539,42±18,63 μg/cm² (B1), 576,82±52,12 μg/cm² (B2), 619,46±23,42 μg/cm² (C1), dan 1116,74±77,75 μg/cm² (C2). Berdasarkan hasil tersebut dapat disimpulkan bahwa adanya silikon akan meningkatkan daya penetrasi krim antikerut.

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Xanthone is an antioxidant compound which is found in the pericarp of mangosteen (Garcinia mangostana L.) and this research was using DPPH to determine the IC50 of ethanolic extract of mangosteen pericarp and cream preparations. The purpose of this research is to test the physical stability,antioxidant activity assay and to compare the penetration ability between cream with silicon and without silicon. Silicon in topical formulation has the ability to prolong the active compound contact time with the skin and avoid the loss of active substance from abrasion. All formulations were examined their penetration ability by Franz diffusion cell as in vitro test using Sprague Dawley rat abdomen skin as diffusion membrane. The best antioxidant activity (IC50) is 4442.8 ppm (C2) and total cumulative penetration of xanthone from cream without silicon is 436.19±59.85 μg/cm2 (A) while the value for creams with silicon are 539.42±18.63 μg/cm2 (B1-dimethicone 4%), 576.82±52.12 μg/cm2 (B2-dimethicone 8%), 619.46±23.42 μg/cm2 (C1-cyclomethicone 4%),1116.74±77.75 μg/cm2 (C2-cyclomethocone 8%), respectively. Based on these results, it can be concluded that the silicon compound will increase the penetration ability of cream preparations."

"Niasinamida merupakan vitamin yang larut di dalam air dikenal sebagai vitamin B3 dan telah digunakan untuk mengobati beberapa jenis permasalahan pada kulit. Penelitian ini bertujuan untuk membuat formulasi emulgel yang menggunakan silikon untuk membandingkan daya penetrasi secara in vitro antara emulgel dengan silikon dan tanpa penambahan silikon serta uji stabilitas fisik sediaan. Semua formulasi di uji daya penetrasinya secara in vitro dengan sel difusi Franz menggunakan membran abdomen tikus betina galur Sprague dawley. Jumlah kumulatif niasinamida yang terpenetrasi dari emulgel yang tidak mengandung silikon (F1) adalah 2028,8 ± 64,3 µg/cm2 sedangkan emulgel yang mengandung silikon secara berturut turut (F2-dimetikon dan F3-siklometikon) adalah 4662,4 ± 11,4 µg/cm2 dan 2679,45 ± 9,3 µg/cm2. Nilai fluks berturut-turut F1, F2, dan F3 adalah 253,6 ± 8,0 µg/cm2jam, 582,7 ± 1,4 µg/cm2jam, dan 334,93 ± 1,2 µg/cm2jam. Serta nilai % kumulatif terpenetrasi berturut-turut sebesar 8,89 ± 0,28 %, 17,95 ± 0,04 %, dan 11,83 ± 0,04 %. Berdasarkan hasil tersebut, dapat disimpulkan bahwa adanya silikon terbukti dapat meningkatkan penetrasi emulgel niasinamida dan ketiga formulasi menunjukan kestabilitan fisik yang baik.

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Niacinamide is a water-soluble vitamin, also known as vitamin B3 and has been used to treat several types of dermatological pathologies. The purpose of this research are to make emulgel formulations using silicones to compare the penetration ability as in vitro test between emulgel with or without silicon, and the physical stability test. Penetration ability of all formulations were examined by Franz diffusion cell as in vitro test using Sprague Dawley rat abdomen skin for diffusion membrane. Total cumulative penetration of niacinamide from emulgel without silicone formulation (F1) is 2028,8 ± 64,3 µg/cm2 and emulgel with silicone formulation (F2-dimethicone and F3-cyclomethicone) are 4662,4 ± 11,4 µg/cm2 and 2679,45 ± 9,3 µg/cm2. Fluks of niacinamide respectively (F1, F2, and F3) are 253,6 ± 8,0 µg/cm2hour, 582,7 ± 1,4 µg/cm2hour, and 334,93 ± 1,2 µg/cm2hour. The presentage of penetrated niacinamide are 8,89 ± 0,28 %, 17,95 ± 0,04 %, and 11,83 ± 0,04 %, respectively. Based on those result, it can be concluded that silicone compound can increase the penetration ability of niacinamide emulgels and all formulations showed good physical ;Niacinamide is a water-soluble vitamin, also known as vitamin B3 and has been used to treat several types of dermatological pathologies. The purpose of this research are to make emulgel formulations using silicones to compare the penetration ability as in vitro test between emulgel with or without silicon, and the physical stability test. Penetration ability of all formulations were examined by Franz diffusion cell as in vitro test using Sprague Dawley rat abdomen skin for diffusion membrane. Total cumulative penetration of niacinamide from emulgel without silicone formulation (F1) is 2028,8 ± 64,3 µg/cm2 and emulgel with silicone formulation (F2-dimethicone and F3-cyclomethicone) are 4662,4 ± 11,4 µg/cm2 and 2679,45 ± 9,3 µg/cm2. Fluks of niacinamide respectively (F1, F2, and F3) are 253,6 ± 8,0 µg/cm2hour, 582,7 ± 1,4 µg/cm2hour, and 334,93 ± 1,2 µg/cm2hour. The presentage of penetrated niacinamide are 8,89 ± 0,28 %, 17,95 ± 0,04 %, and 11,83 ± 0,04 %, respectively. Based on those result, it can be concluded that silicone compound can increase the penetration ability of niacinamide emulgels and all formulations showed good physical."