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All Journal Majalah Ilmiah MOMENTUM Atom Indonesia
R. Anggraeni
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Education Energy Physics

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EKSTRAKSI GULA STEVIA DARI TANAMAN STEVIA REBAUDIANA BERTONI R. D. Ratnani; R. Anggraeni
JURNAL ILMIAH MOMENTUM Vol 1, No 2 (2005)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v1i2.654

Abstract

Stevia Rebaudiana Bertoni  adalah sejenis Tanaman perdu yang belum banyak dikenal oleh masyarakat. Didalam Industri, banyak digunakan sebagai bahan pemanis untuk produk makanan dan minuman berkalori rendah atau sebagai pengganti gula bagi penderita diabetes.Proses pengambilan bahan pemanis dari daun Stevia Rebaudiana dilakukan dengan cara ekstraksi bubuk daun didalam pelarut ( metanol,etanol ,spiritus  , aquadest ) yang dilanjutkan dengan pencucian  menggunakan Khloroform.Kemudian dicuci kembali dengan n- Butanol dan diuapkan dengan menggunakan metanol panas kemudian disaring.Dari hasil penelitian didapatkan kondisi operasi yang relatif baik untuk mengekstraksi daun stevia ,yaitu pada delapan kali sirkulasi dengan pelarut metanol teknis.Kristal halus yang terambil dari 20 gram serbuk stevia dengan volume pelarut 200 ml berwarna coklat, berat 0.2985 gram dengan indeks bias 1.3950 Kata Kunci  : Stevia Rebaudiana Bertoni, Diabetes, Ekstraksi
Dose Response of Hp(0.07) on TLD-700 and TLD-900 Based Ring Dosimeters to the Sr-90 Exposure Jumpeno, E. B.; Anggraeni, R.; Putri, M. Muharani; Barokah, S. N.; Adisti, F. N.
Atom Indonesia Vol 50, No 3 (2024): DECEMBER 2024
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/aij.2024.1425

Abstract

The preparation of radiopharmaceuticals may necessitate close contact with the radioactive source. In this case, high-energy beta-emitting nuclides can cause a high exposure. There are two methods of measuring the dose in the extremities, including using a bracelet and a ring dosimeter. In this study, the response of Hp(0.07) dose in TLD-700 and TLD-900-based ring dosimeters to Sr-90 beta radiation will be compared for parameters of distance, time, and angle of irradiation. The dosimeters were irradiated using Sr-90 at a distance of 5, 7, and 10 cm from the source surface and all of them were subsequently read with TLD Reader. The same type of dosimeters were exposed to Sr-90 for 1 day, 2 days, and 3 days at a distance of 7 cm and read. At a distance of 7 cm, the other dosimeters were irradiated at angles of 30°, 60°, -30°, and -60°, and then read. The study shows that the relationship between the distance of irradiation to Hp(0.07) dose is polynomial with a correlation factor of 1, both for TLD-700 and TLD-900-based ring dosimeters. The dose response at the variation of irradiation time showed linear behavior with correlation coefficients of 0.9942 and 0.9999 for TLD-700 and TLD-900, respectively. The decrease in Hp(0.07) response in TLD-700 reached 14-31 % for the irradiation angle of ±30o and 23-27 % in TLD-900 for the same angle. Meanwhile, the decrease in Hp(0.07) response at the angle of irradiation ±60o reached 48 % for TLD-700 and 66-67 % for TLD-900.
Co-Authors Adisti, F. N. Barokah, S. N. Jumpeno, E. B. Putri, M. Muharani Rita Dwi Ratnani