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All Journal VALENSI Jurnal Kefarmasian Indonesia
Rahayu, Dien Puji
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Chemistry Medicine & Pharmacology

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Pengaruh Iradiasi Sinar Gamma terhadap Kandungan Flavonoid dan Tanin Total Teh Putih (Camellia sinensis L.) dan Benalu Teh (Scurulla atropurpurea BL. Dans) Sari, Bina Lohita; Rahayu, Dien Puji; Rohdiana, Dadan; Nurlita, Selvi; Sahara, Putri Siti
Jurnal Kefarmasian Indonesia VOLUME 8, NOMOR 1, FEBRUARI 2018
Publisher : Pusat Penelitian dan Pengembangan Biomedis dan Teknologi Dasar Kesehatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22435/jki.v8i1.3719

Abstract

Camellia sinensis L. leaves, commonly known as white tea, are cultivated from unfurled bud leaves and protected from the sun while were hand picked. Scurulla atropurpurea [BL] Dans is well-known as loranthus of tea. The active compounds of both samples are flavonoid (flavanol, flavonol) and tannin. High humidity conditions can damage the simplicia of medicinal plants in the long-term storage process.The irradiation process with gamma rays can extent the shelf life of simplicia.Gamma irradiation is one of the most effective methods to extend the shelf life of simplicia. Both simplicia were irradiated in room temperature at 60Co source at doses of 0; 2.5; 5; 7.5; 10 and 12.5 kGy. Irradiation simplicia was immediately extracted with microwave assisted extraction (MAE) using 60% ethanol solvent to produce white tea and loranthus of tea extract. Flavonoid and total tannin content were determined using aluminium chloride and folin-ciocalteau methods. Flavonoids and total tannin in the tea samples were 2.56; 2.50; 3.73; 3.14; 2.68; 2.34 mgQE/g and 109.67; 132.87; 149.40; 107.29; 141.82;134.95 mgGAE/g, respectively. Meanwhile in the loranthus of tea were 7.10; 5.68; 5.79; 8.84; 5.01; 5.44 mgQE/g and 60.34; 58.61; 58.59; 71.37; 54.16; 65.99 mgGAE/g, consecutively. Results of the research showed that radiation dose of 5 kGy was found to be effective dose for white tea whilest 7.5 kGy for loranthus of tea to reach highest flavonoid and total tannin content.
Synthesis and Characterization of Low Molecular Weight Irradiated Chitosan in Various Water Levels and Gamma-Ray Doses Rosspertiwi, Reni; Yunus, Ade Lestari; Rahayu, Dien Puji; Nurlidar, Farah; Azizah, Yulyani Nur
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 10, No. 1, May 2024
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v10i1.36509

Abstract

Chitosan is a biopolymer derived from marine animal shell waste that exhibits numerous pharmacological activities. However, its high molecular weight limits the application in various fields due to its low solubility. Therefore, this study aims to synthesize low molecular weight chitosan using varying water content and doses of gamma irradiation. To initiate chitosan degradation, H2O (5 and 10 mL) was added, followed by gamma ray irradiation at doses of 5 and 10 kGy. The Molecular Weight (MW) of degraded chitosan was determined using Gel Permeation Chromatography (GPC), while Fourier Transform Infrared Spectroscopy (FTIR) was used to characterize the functional groups and degree of deacetylation of chitosan. The study found that the molecular weight of irradiated chitosan decreased as the irradiation dose and H2O addition increased. The addition of 10 mL of water and gamma irradiation at a dose of 10 kGy has been found to reduce the molecular weight of chitosan to 118 kDa, with a high deacetylation degree of 86.78%. The FTIR analysis showed no significant changes in the functional groups, indicating that gamma irradiation did not affect the structure of chitosan.
Co-Authors Bina Lohita Sari Dadan Rohdiana Farah Nurlidar Nurlita, Selvi Rosspertiwi, Reni Sahara, Putri Siti Yulyani Nur Azizah Yunus, Ade Lestari