Abstract. Antioxidant is a compound that could obstruct oxidation reaction through free radical binding. Garlic (Allium sativum L.) is a plant which has many benefits that could be used for traditional medication. Some of pharmacology effects which was discovered are antioxidant, anti-hypertensive, anti-cholesterol, and antimicrobial. Black garlic is the heating aging process which induces many chemical reactions of garlic such as non-enzymatically discoloration to be brown, Maillard reaction which produces antibacterial compound, caramelization, and phenol formation as antioxidant that causes discoloration from cream to dark brown or black. White and Black garlic were extracted through two methods, namely maceration (room temperature) and digestion (± 40°C) by using 96% ethanol solvent. The activity test of extract antioxidant is done using DPPH free radical reduction (2,2-difenil-1-pikrilhidrazil) with absorbance measurement uses UV-Vis spectrophotometry with DPPH maximum wavelength is 515 mm. Garlic maceration has value IC50 in the amount of 28.422 ppm, two weeks maceration of black garlic in the amount of 27.129 ppm and four weeks maceration of black garlic in the amount of 13.041 ppm. While garlic digestion in the amount of 28.524 ppm, two weeks digestion of black garlic in the amount of 28.086 ppm and four weeks digestion of black garlic in the amount of 15.160 ppm. Abstrak. Antioksidan merupakan senyawa yang dapat menghambat reaksi oksidasi, dengan cara mengikat radikal bebas. Bawang putih (Allium sativum L.) merupakan salah satu tanaman yang mempunyai banyak khasiat yang digunakan untuk pengobatan tradisional. Efek farmakologi yang telah diketahui salah satunya adalah antioksidan, anti-hipertensi, anti-kolesterol, anti-mikroba. Bawang hitam merupakan proses aging dengan pemanasan yang menginduksi banyak reaksi kimia pada bawang putih seperti perubahan warna menjadi coklat secara non-enzimatik, reaksi Maillard yang menghasilkan senyawa antibakteri, karamelisasi, dan pembentukan fenol sebagai antioksidan yang menyebabkan warnanya berubah dari putih kekuningan menjadi coklat tua atau hitam. Bawang putih dan bawang hitam diekstraksi menggunakan dua metode yaitu maserasi (suhu kamar) dan digesti (suhu ±40°C) dengan menggunakan pelarut etanol 96%. Uji aktivitas antioksidan ekstrak dilakukan dengan menggunakan metode peredaman radikal bebas DPPH (2,2-difenil-1-pikrilhidrazil) dengan pengukuran absorbansi menggunakan spektrofotometri UV–Vis pada panjang gelombang maksimal DPPH yaitu 515 nm. Pada bawang putih maserasi memiliki nilai IC50 sebesar 28,422 ppm, bawang hitam 2 minggu maserasi 27,129 ppm dan bawang hitam 4 minggu maserasi 13,041 ppm. Sedangkan pada bawang putih digesti 28,524 ppm, bawang hitam 2 minggu digesti 28,086 ppm dan bawang hitam 4 minggu digesti 15,160 ppm.
Breynia cernua has been used as an alternative medicine for wounds, smallpox, cervical cancer, and breast cancer. This plant is a potential source of new plant-derived drugs to cure numerous diseases for its multiple therapeutic functions. An in vitro study revealed that the methanol extract of B. cernua (stem) exhibits antioxidant activity according to DPPH and SOD methods, with IC50 values of 33 and 8.13 ppm, respectively. The extract also exerts antibacterial activity against Staphylococcus aureus with minimum bactericidal concentration of 1875 ppm. Further analysis revealed that the extract with a concentration of 1–2 ppm protects erythrocytes from the ring formation stage of Plasmodium falciparum, while the extract with a concentration of 1600 ppm induced apoptosis in the MCF-7 breast cancer cell line. GC–MS analysis showed 45 bioactive compounds consisting of cyclic, alkyl halide, organosulfur, and organoarsenic compounds. Virtual screening via a blind docking approach was conducted to analyze the binding affinity of each metabolite against various target proteins. The results unveiled that two compounds, namely, N-[β-hydroxy-β-[4-[1-adamantyl-6,8-dichloro]quinolyl]ethyl]piperidine and 1,3-phenylene, bis(3-phenylpropenoate), demonstrated the best binding score toward four tested proteins with a binding affinity varying from −8.3 to −10.8 kcal/mol. Site-specific docking analysis showed that the two compounds showed similar binding energy with native ligands. This finding indicated that the two phenolic compounds could be novel antioxidant, antibacterial, antiplasmodial, and anticancer drugs. A thorough analysis by monitoring drug likeness and pharmacokinetics revealed that almost all the identified compounds can be considered as drugs, and they have good solubility, oral bioavailability, and synthetic accessibility. Altogether, the in vitro and in silico analysis suggested that the extract of B. cernua (stem) contains various compounds that might be correlated with its bioactivities.
Various ethnics of the world have a long history on using their surrounding as the source of foods. Foods which are act as product of traditional ethnic knowledge known as traditional and ethnic foods (TEF). Vegetables are one of the main ingredients of TEF. As sources of many combination of phytonutrients, vegetables offer various health benefits. As a country with long history of agricultural practice, Indonesia also has abundant knowledge of how Indonesian ethnics process and consume vegetables.Vegetables, in Sundanese tradition, usually consumed as “lalap” or “lalapan”. Some lalapan are cultivated vegetables and some others are come from wild sources. This article discuss the health benefits of wild source lalapan, which can be found in natural habitat.
Abstract. Karuk (Piper sarmetosum Roxb. Ex. Hunter) is a plant that is considered to have antibacterial activity. Acne is a problem in the skin caused by the bacteria Propionibacterium acnes. This research’s aimed to determine the potential antibacterial activity of ethanol extracts and karuk leaf’s fractions, and can find out the class of chemical compounds contained from the ethanol extract and the fraction of karuk leaves which have antibacterial activity. Karuk leaf was extracted by maceration method using 96% ethanol solvent, followed by fractionation using the liquid-liquid extraction method with n-hexane, ethyl acetate, and water solvents. Antibacterial activity test of ethanol extract and fraction with a concentration of 2%, 4%, 6%, and 8% using the well diffusion agar method. To identify the class of compounds that have antibacterial activity, the TLC Bioautography method is used. From the results of research that has been done shows that ethanol extract and n-hexane fraction can inhibit the growth of Propionibacterium acnes with the highest inhibitory diameter of 10.11mm in the extract, and in the n-hexane fraction of 10.93 mm. in the ethyl acetate fraction and the water fraction there is no inhibitory zone formed so that it cannot provide antibacterial activity. The TLC Bioautography results did not show any inhibitory zones and there was no change in color when given a spotting viewer. So that compounds cannot be identified that have antibacterial activity Abstrak. Karuk (Piper sarmetosum Roxb. Ex. Hunter) merupakan tanaman yang diketahui memiliki aktivitas sebagai antibakteri. Jerawat merupakan permasalahan pada kulit disebabkan adanya bakteri Propionibacterium acnes. Penelitian ini bertujuan untuk menentukan potensi aktivitas antibakteri dari ekstrak etanol dan fraksi daun karuk, serta dapat mengetahui golongan senyawa kimia yang terkandung dari hasil ekstrak etanol dan fraksi daun karuk yang memiliki aktivitas antibakteri. Daun karuk diekstraksi dengan metode maserasi menggunakan pelarut etanol 96%, dilanjutkan dengan fraksinasi menggunakan metode ekstraksi cair-cair dengan pelarut n-heksan, etil asetat, dan air. Uji aktivitas antibakteri ekstrak etanol dan fraksi dengan konsentrasi 2%, 4%, 6%, dan 8% menggunakan metode difusi sumuran agar. Untuk mengetahui golongan senyawa yang memiliki aktivitas sebagai antibakteri digunakan metode KLT Bioautografi. Dari hasil penelitian yang telah dilakukan menunjukan bahwa ekstrak etanol dan fraksi n-heksan dapat menghambat pertumbuhan Propionibacterium acnes dengan diameter hambat tertinggi 10,11mm pada ekstrak, dan pada fraksi n-heksan 10,93 mm. pada fraksi etil asetat dan fraksi air tidak terbentuk adanya zona hambat sehingga tidak dapat memberikan aktivitas sebagai antibakteri. Hasil KLT Bioautografi tidak menunjukan adanya zona hambat serta tidak terdapat perubahan warna ketika diberikan penampak bercak. Sehingga tidak dapat teridentifikasi senyawa yang memiliki aktivitas antibakteri.
Arabica coffee (Coffea arabica L.) planted in the Arjsari area has the quality of being a specialty coffee that has superior taste and quality. Post-harvest processing can affect the content of the compounds in coffee such that it will affect the quality of the coffee beans. The post-harvest process from coffee cherries to green coffee beans in a natural, semi-washed, and full-washed manner affects the physical form and taste quality of the coffee beans. This study aimed to determine the antioxidant properties of green coffee beans processed by three different post-harvest processes. The test was carried out in vitro using the DPPH (2,2-diphenyl-1-picryl-hydrazyl) method. Antioxidant activity can be seen from the IC50 value. Vitamin C with an IC50 value of 6.1899 ppm was used in comparison. The test results showed that the three ethanolic extracts of green coffee beans had very strong antioxidant properties when compared with the Vitamin C, with the IC50 values of natural, full-washed, and semi-washed ethanolic extract of green coffee beans, respectively being - 33.8648; 27.1245; and 26.9975 ppm. Keywords: antioxidant, arabica coffee, coffea arabica L. post-harvest process
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