<p>Daun salam mengandung flavonoid sebagai antihipertensi, flavonoid yang diberikan secara peroral memiliki bioavailabilitas yang kurang baik karena kelarutan yang rendah dan tidak stabil terhadap faktor lingkungan. Salah satu upaya yang dapat dilakukan untuk mengatasi masalah tersebut adalah dengan memformulasikan dalam sediaan nanopartikel menggunakan polimer kitosan dan natrium tri-polifosfat (NaTPP). Penelitian ini bertujuan untuk mengkarakterisasi nanopartikel dari ekstrak etanol daun salam dengan variasi rasio konsentrasi kitosan. Ekstrak etanol daun salam diperoleh dengan cara ekstraksi menggunakan metode maserasi dengan pelarut etanol 96%. Hasil ekstrak dibuat koloid nanopartikel menggunakan teknik gelasi ionic menggunakan variasi ekstrak etanol daun salam: kitosan: NaTPP (1:1:1); (1:5:1); dan (1:10:1). Koloid nanopartikel yang terbentuk dikarakterisasi ukuran partikel, dan nilai zeta potensial. Hasil penelitian menunjukan bahwa ekstrak etanol daun salam positif mengandung flavonoid. Hasil karakterisasi nanopartikel ekstrak etanol daun salam menunjukkan bahwa formula F1, F2, dan F3 mempunyai ukuran partikel 284,2 <strong>± </strong>6,8; 410,6 ± 6,8; dan 630,1 ± 3,4 nm dan nilai zeta potensial F1, F2 dan F3 adalah 50,1 <strong>± </strong>4,3; 45,8 ± 0,7; dan 59,2 ± 1,2 mV. Semua formula menunjukan rentan karakterisasi sediaan nanopartikel (<1000nm) Peningkatan rasio kitosan dalam formulasi nanopartikel ekstrak etanol daun salam meningkatkan ukuran partikel dan nilai zeta potensial. F1 merupakan formula dengan ukuran partikel paling kecil dengan karakterisasi ukuran partikel <300nm dan stabilitas sistem dispersi yang optimal yaitu >30 mV. </p>
Free radicals are one of the cause of various diseases. The use of synthetic antioxidant compounds could prevent the effect of the free radicals, however may cause adverse effects on the human body such as impaired liver, lung, intestinal and poisoning. Therefore antioxidant from natural resources needs to be developed. The purpose of this research was to determine the antioxidant activity and IC50 value of the ethanol extract of ganitri (Elaeocarpus ganitrus Roxbs.) leaves. Ganitri leaf ethanol extract activity test was carried out using DPPH method with vitamin C as a standard. Antioxidant activity was determined as a decreas in the absorbance of DPPH at 517 nm wavelength after an addition of the extract with the concentrations of 20, 40, 80, and 100 ppm. The antioxidant acitivity measurement of the ganitri leaf extract showed that the linier regression equation obtained was y = 0.3669x + 29.546, r = 0.4573 while the IC50 value was 54,12 ppm. Based on the result, it is concluded that the ethanol extract of ganitri (Elaeocarpus ganitrus Roxb.) leaf showed was categorized as strong antioxidant.
Kulit durian merupakan bagian tanaman yang pernah diteliti sebelumnya dan mempunyai aktivitas farmakologi sebagai antioksidan. Kulit durian mengandung metabolit sekunder yaitu flavonoid, tanin dan alkaloid. Kulit durian diekstrak menggunakan pelarut etanol 70% dengan metode sokletasi. Pengujian aktivitas antioksidan menggunakan metode pengukuran penangkapan radikal bebas oleh 1,1-difenil-2-pikrilhidrazil (DPPH). Vitamin C digunakan sebagai kontrol positif dengan nilai IC50 5,63 ppm dan ekstrak etanol sebesar 204,33 ppm. Penelitian ini menunjukkan bahwa ekstrak etanol kulit durian tidak memiliki aktivitas antioksidan menggunakan metode DPPH. Kata Kunci: Durian, Sokletasi, DPPH (2,2-difenil-1-pikrilhidrazil), antioksidan, IC50 Durian fruit peels (Durion zibethinus Murr.) have been studied previously and reported to have phramacological activity that has the potential to be antioxidant. The durian fruits peels, contained secondary metabolite, namely flavonoids, tannin and alkaloid. Durian fruit peels (Durion zibethinus Murr.) were extracted with ethanol 70% with soxletation method. The antioxidant activity of extracts were evaluated by 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity assay. Vitamin C was used as standard with IC50 5,63 ppm and the ethanol eztracts showed IC50 204,33 ppm. This study provided that Durian fruit peels (Durion zibethinus Murr.) cannot inhibit free radical usimg the DPPH method.
Indonesian is a tropical country that has been known as a producer of various agricultural commodities, including medicinal plants. Traditional medicine is a hereditary heritage of the ancestors who are deeply rooted in the culture of the nation, therefore both in the herb and in its use as a traditional medicine is still based on experiences passed down from generation to generation both orally and in writing. Health services in Indonesia have grown, but people's interest in utilizing traditional medicine remains high. This study aims to reveal the knowledge of the community about the types of plants that are utilized for the fulfillment of daily living needs. This research was conducted around Sempor District Kebumen District. This study uses survey method designed to obtain a description of the various types of medicinal plants used by the community. Determination of informants by using snowball sampling. The results of the survey and the interviews were made of the categories of plant utilization. From the results of the research, it is found that the people around Sempor still have a good knowledge about the diversity of plants and their utilization in everyday life. Based on the survey results, there were 200 species of plants utilized by the community, grouped into categories: foodstuff (90 species), herbal medicine and traditional medicine (44 species), building materials (29 species), fuelwood (13 species) , animal feed ingredients (11 species), craft materials and tools (8 types), fiber materials and rope (3 types), and toxic materials (2 types)
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