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Abstrak :
Manggis Hutan ( Garcinia rigida Miq ) termasuk ke dalam familia Guttiferae, dan banyak tersebar di wilayah Asia Tenggara. Hampir sebagian besar dari genus Garcinia telah diteliti dan memiliki khasiat sebagai tanaman obat. Penelitian ini dilakukan untuk mengetahui kandungan kimia dan aktivitas antioksidan dari ekstrak kulit batang manggis hutan. Pemisahan dan pemurnian ekstrak menggunakan kromatografi kolom cepat dan kromatografi lapis tipis. Isolat ditentukan struktur molekulnya secara Spektrometri Resonansi Magnetik Inti CH-NMR dan 13C-NMR) dan Spektrometri Massa, serta diuji aktivitas antioksidannya menggunakan 1,1-Diphenyl-2- picrylhydrazyl (DPPH). Pada kromatografi kolom cepat digunakan silika gel 60 F254 sebagai fase diam dan pelarut n-heksana, etil asetat serta metanol sebagai fase gerak dengan tingkat kepolaran yang bertingkat. Setelah rekristalisasi, diperoleh dua isolat, senyawa A dari ekstrak n-heksana ( Rf 0,27 ) dan senyawa 8 dari fraksi 11 ekstrak aseton ( Rf 0,69 ). Hasil uji aktivitas antioksidan menunjukkan bahwa kedua senyawa kurang aktif dengan nilai ICsa masing-masing sebesar 723,43 ~ g/ml untuk senyawa A dan 229,73 ~g/ml untuk senyawa 8. Hasil identifikasi dan karakterisasi isolat menunjukkan bahwa senyawa A adalah campuran dari a-amirin dan f3-amirin, sementara senyawa 8 adalah campuran dari stigmasterol dan f3-sitosterol. ......Manggis Hutan (Garcinia rigida Miq), belongs to Guttiferae, is a widespread plant in Southeast Asia. Almost all of the researched Garcinia genus are known as medical plants. The research was done to find out the chemical constituents and antioxidant activity of manggis hutan's bark extract. Extract separation and purification was using fast column chromatography and thin layer chromatography. The determination of molecule structure from isolate was using Nuclear Magnetic Resonance Spectrometry CH-NMR dan 13C-NMR) and Mass Spectrometry, then tested its antioxidant activity using 1,1-Dipheny/-2-picry/hydrazy/ (DPPH) radical scavenging activity method. Fast column chromatography was using silica gel 60 F254 as steady phase and mixture of n-hexane, ethyl acetate and methanol in different grades of polarity as mobile phase. After further purification, two constituents were isolated, isolate A was from hexane extract ( Rf value 0,27) and isolate B was from the 11th acetone extract's fraction ( Rf value 0,69 ). The result of antioxidant test showed that these isolates were less active with each value of ICso was 723,43 J..I g/ml and 229,73 J..I g/ml. Isolate identification and characterization showed that the compound of isolate A was a mixture of aamyrin and J3-amyrin, and isolate B was a mixture of stigmasterol and B-sitosterol.

Abstrak :
Pencemaran makanan oleh zat aditif seperti formalin dan melamin merupakan hal yang sudah tidak asing lagi di telinga kita. Pengembangan metode yang mudah, cepat, dan sensitif untuk mendeteksi formalin dan melamin sangat penting, salah satunya dengan nanopartikel Au (AuNP). Dalam sintesis AuNP seringkali digunakan bahan yang mencemari lingkungan. Pada penelitian ini berhasil dikembangkan green synthesis AuNP dengan ekstrak kulit manggis (EKM) (Garcinia Mangostana L.) yang berpotensi sebagai pendeteksi formalin dan melamin. Hasil partisi, kromatografi kolom, KLT, dan karakterisasi dengan spektrofotometer FTIR dan LC-MS menunjukkan bahwa senyawa aktif yang terkandung dalam EKM yang diusulkan adalah senyawa aktif turunan flavonoid. Pada kondisi optimum sintesis AuNP@EKM diperoleh λmaks 531 nm (22 nm). AuNP@EKM stabil selama 17 hari dengan λmaks 530-532 nm. Hasil karakterisasi spektrofotometer UV-Vis dan PSA menunjukkan AuNP@EKM berpotensi mendeteksi formalin dan melamin ditandai dengan pergeseran λmaks dan perubahan warna koloid AuNP@EKM akibat adanya interaksi hidrogen. ......Contamination of food additives such as formaldehyde and melamine is familiar in this recent cases. Developments of easy, rapid, and sensitive methode to detect formaldehyde and melamine are precisely very important and one of the methodes is detection with gold nanoparticles (AuNP). In synthesis of AuNP, often used materials that pollute the environment. This research has successfully developed green synthesis AuNP with mangosteen peel extract (MPE) (Garcinia Mangostana Contamination of food additives such as formaldehyde and melamine is familiar in this recent cases. Developments of easy, rapid, and sensitive methode to detect formaldehyde and melamine are precisely very important and one of the methodes is detection with gold nanoparticles (AuNP). In synthesis of AuNP, often used materials that pollute the environment. This research has successfully developed green synthesis AuNP with mangosteen peel extract (MPE) (Garcinia Mangostana L.) that had potentiality as detector for formaldehyde and melamine. The results of the partition, column chromatography, TLC, and characterization by FTIR spectrophotometer and LC-MS showed that the active compound contained in MPE is flavonoid derivative active compound. The optimum condition of AuNP@MPE synthesis was obtained at λmaks 531 nm (22 nm). AuNP@MPE stable for 17 days with λmaks 530-532 nm. The results of characterization of UV-Vis spectrophotometer and PSA showed that AuNP@MPE has potentiality to detect formaldehyde and melamine. It characterized by shifting of λmaks and discoloration of the colloidal AuNP@MPE due to the interaction of hydrogen.

Abstrak :
[Kanker merupakan salah satu penyebab kematian utama di dunia, termasuk Indonesia. Berbagai penelitian dilakukan untuk mencari alternatif terapi kanker. Kulit manggis dipercaya mempunyai kandungan senyawa yang bersifat sitotoksik terhadap sel kanker. Penelitian ini bertujuan untuk mengetahui efek sitotoksisitas ekstrak etanol kulit manggis terhadap sel limfoma Hodgkin. Ekstrak yang digunakan berasal dari proses ekstraksi kulit manggis dengan pelarut etanol menggunakan Vaccum Rotary Evaporator pada tekanan 1 atm dengan suhu 60o C. Ekstrak kulit manggis diberikan dalam 8 konsentrasi berbeda yaitu 6,25 μg/ml, 12,5 μg/ml, 25 μg/ml, 50 μg/ml, 100 μg/ml, 200 μg/ml, 400 μg/ml, dan 800 μg/ml. Sitotoksisitas dinilai dengan uji MTT-assay untuk mendapat nilai IC50. Hasil penelitian menunjukkan bahwa ekstrak etanol kulit manggis mempunyai efek sitotoksik terhadap sel limfoma Hodgkin dengan nilai IC50 sebesar 5.6 μg/ml. Uji kemaknaan menggunakan uji Kruskal-Wallis menunjukkan nilai p = 0.008 (p ≤ 0.05). Kesimpulan dari penelitian ini yaitu ekstrak etanol kulit manggis mempunyai efek sitotoksik kuat terhadap sel Limfoma Hodgkin.;Cancer is one of the leading cause of death in the world, including Indonesia. Various studies have been done to seek alternative cancer therapy. Mangosteen pericarp is believed to have substance that are cytotoxic to cancer cells. The purpose of this study is to determine the in vitro cytotoxicity of mangosteen pericarp ethanol extract on Hodgkin Lymphoma cells. The extract used in this study is obtained from the mangosteen pericarp extraction using Vacuum Rotary Evaporator at a pressure of 1 atm and temperature of 60o C. Mangosteen pericarp extract is given in eight different concentration of 6.25 ug / ml, 12.5 pg / ml, 25 mg / ml, 50 pg / ml, 100 pg / ml, 200 mg / mL, 400 mg / ml, and 800 ug / ml. Cytotoxicity was assessed using MTT-assay test to obtain IC50 values. The results showed that ethanol extract of mangosteen pericarp has a cytotoxic effect on Hodgkin lymphoma cells with IC50 value of 5.6 ug / ml. The data were analyzed using Kruskal-Wallis test and had a p value of 0.008 (p ≤ 0.05). The conclusion of this study is that ethanol extract of mangosteen pericarp has a strong cytotoxic effect on Hodgkin lymphoma cells, Cancer is one of the leading cause of death in the world, including Indonesia. Various studies have been done to seek alternative cancer therapy. Mangosteen pericarp is believed to have substance that are cytotoxic to cancer cells. The purpose of this study is to determine the in vitro cytotoxicity of mangosteen pericarp ethanol extract on Hodgkin Lymphoma cells. The extract used in this study is obtained from the mangosteen pericarp extraction using Vacuum Rotary Evaporator at a pressure of 1 atm and temperature of 60o C. Mangosteen pericarp extract is given in eight different concentration of 6.25 ug / ml, 12.5 pg / ml, 25 mg / ml, 50 pg / ml, 100 pg / ml, 200 mg / mL, 400 mg / ml, and 800 ug / ml. Cytotoxicity was assessed using MTT-assay test to obtain IC50 values. The results showed that ethanol extract of mangosteen pericarp has a cytotoxic effect on Hodgkin lymphoma cells with IC50 value of 5.6 ug / ml. The data were analyzed using Kruskal-Wallis test and had a p value of 0.008 (p ≤ 0.05). The conclusion of this study is that ethanol extract of mangosteen pericarp has a strong cytotoxic effect on Hodgkin lymphoma cells]