Background: Phenol compounds and flavonoids are known have antioxidant activity. Sterculia genus has secondary metabolite rich of phenols and flavonoids. Objective: The aim of this study of the activity antioxidants of Sterculia stipulata Korth. Woods and leaves by FRAP method. Materials and methods: Extraction done using n-hexane, ethyl acetate, and methanol. The methanol extract was determined antioxidant activity using the FRAP method and also determined the total phenols content, total flavonoids, and phytochemical screening. Results: The antioxidant activity of wood extract was 4.74 ± 1.03 FeEAC (mol/g) while leaves extract 41.17 ± 1.99 FeEAC (mol/g). Total phenols content for wood extract 16.46 ± 3.51 mg GAE/g, for leaves extract 141.62 ± 10.54 mg GAE/g. The total flavonoids content for woods extract was 27.99 ± 0.62 mg QE/g for leaf extract 41.45 ± 5.83 mg QE/g. The compounds of woods and leaves are the same; it is consist of terpenoids, alkaloids, phenols, flavonoids, saponins, terpenoids, and negatives for anthraquinone. Conclusion: The antioxidant activity of the leaves of Sterculia stipulata Korth. is greater than its wood activities.
The RFS extract solution and pancreatic elastase (PPE) were mixed in Trizma®-HCl buffer (pH 8.0), then pre-incubated at 25 o C for 5 min. Substrate N-Succinyl-Ala-Ala-Ala-p-nitroanilide (SANA) was added to the mixture and incubated at 25 o C for 20 min in 96-well microplate (Nunc). The optical density due to the formation of p-nitroaniline was ABSTRACT Introduction: Some Rubus were reported had anti-skin aging activity. Rubus fraxinifolius was one of Rubus genus which lives in Indonesian highland. Objective: This study was to examine elastase, tyrosinase, and oxidant inhibitory activity of R. fraxinifolius stem (RFS) extract. Methods: Extraction was done by a Soxhlet apparatus using methanol as solvent. Elastase inhibition activity was determined, which based on the formation of p-nitroaniline. Tyrosinase inhibition activity evaluated based on inhibition of mushroom tyrosinase by the sample with L-DOPA as substrate. The activity of antioxidant was determined using the DPPH radical scavenger method. LC-MS was used for prediction of naturally occurring phytochemicals. Results: The RFS extract yield was 9.03 %. The RFS extract revealed inhibition activity against elastase and tyrosinase with IC 50 128.85 ppm, and 155.19 ppm, respectively. DPPH radical scavenging activity gave IC 50 63.04 ppm. Total phenolic content of the extract was 387.99+3.21 mg GAE/g extract. The LC-MS analysis showed the presence of at least 13 different organic compounds in RFS extract, which might contribute to the bioactivity. Conclusion: Therefore, this experiment further proved that RFS extract might be useful as a natural product ingredient of anti-photoaging skincare products because of its ability to inhibit elastase, tyrosinase, and as an antioxidant.
AbstrakBawang putih (Allium sativum L.) merupakan salah satu tanaman obat yang potensial untuk dikembangkan menjadi obat tradisional. Produk obat tradisional dan tanaman obat yang berkualitas ditentukan salah satunya oleh mutu dan keamanan ekstrak. Faktor yang dapat mempengaruhi mutu salah satunya adalah daerah tempat tumbuh. Penelitian ini bertujuan untuk membandingkan beberapa nilai parameter fisikokimia serta kadar senyawa yang bertanggung jawab atas aktivitas farmakologis dalam ekstrak etanol 70% bawang putih yang didapat dari dua tempat tumbuh yaitu Bogor dan Wonosobo. Ekstrak bawang putih yang berasal dari Bogor menunjukkan hasil kadar sari larut air 62,5684%, kadar sari larut etanol 10,0779%, minyak atsiri 0,7477%, kadar allyl disulfide 1,8322%, kadar abu 2,3529%, dan kadar abu tidak larut asam 0,1115%. Ekstrak bawang putih yang berasal dari Wonosobo menunjukkan hasil kadar sari larut air 59,0007%, kadar sari larut etanol 8,9230%, minyak atsiri 0,3400%, kadar allyl disulfide 1,6542%, kadar abu 3,0196%, dan kadar abu tidak larut asam 0,4974%. Berdasarkan hasil penelitian tersebut, disimpulkan ekstrak yang mempunyai mutu paling baik adalah bawang putih yang berasal dari Bogor dengan nilai parameter spesifik yang lebih tinggi dan nilai parameter non spesifik yang lebih rendah. AbstractGarlic (Allium sativum L.) is one of the medicinal plants that has a potential to be developed to become a traditional medicine. Traditional medicinal products and medicinal plants which have good quality are determined by the quality and safety of the extract. One of many factors that can affect the quality is the growing area. This research aimed to compare the value of physicochemical parameters as well as the levels of compounds responsible for pharmacological activity in ethanol 70% extract of garlic obtained from two growing areas, Bogor and Wonosobo. The test results obtained from garlic extract of Bogor were: compound contents dissolved in water was 62.5684%, compound contents dissolved in ethanol was 10.0779%, essential oils contents was 0.7477%, levels of allyl disulfide was 1.8322%, total ash content was 2.3529%, ash content insoluble in acid was 0.1115%. While the test results obtained from garlic extract of Wonosobo: compound contents dissolved in water was 59.0007%, compound contents dissolved in ethanol was 8.9230%, essential oils contents was 0.3400%, levels of allyl disulfide was 1.6542%, total ash content was 3.0196%, ash content insoluble in acid was 0.4974%. Based on those results, the best quality extract was garlic from Bogor with higher specific parameter values and lower non-specific parameter values.
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