Three phenolic acids, (+)catechins, chlorogenic acid, and rutin, were identified and quantified in Mamaki leaves using a liquid chromatograph-mass spectrometer technique. Concentrations of (+)catechins, chlorogenic acid, and rutin varied from 1.1 to 5.0 mg/g of Mamaki leaves as determined in the extract using 0.5% acetic acid in 90% aqueous methanol. This study also quantified total antioxidant capacity using the photochemiluminescence method, which was expressed in equivalents to ascorbic acid (AA). Mamaki teas brewed for 30 min contained total antioxidant activity (TAA) between 238 and 259 mg AA/g of tea. Mamaki teas brewed for 1 h and stored at 4 h, 1 d, and 3 d at 4 degrees C had available TAA 293, 271, 172, and 163 mg AA/g of tea leaves, respectively. The concentrations of (+)catechins and rutin in Mamaki leaves are compared to other types of popular teas. Mamaki teas contained relatively low amounts of TAA compared to green teas and Lipton teas.
ujuan penelitian ini adalah mengetahui pengaruh penggunaan sari biji buah pucung, tingkatketoksikan, dan konsentrasi minimal yang optimal terhadap mortalitas keong mas (Pomaceacanaliculata). Penelitian ini merupakan penelitian eksperimen. Konsentrasi sari biji buah pucung yangdigunakan untuk perlakuan sebesar 1,58%; 2,51%; 3,98%; 6,30%; 9,98% dan kontrol. Keong mas yangdigunakan yaitu 270 ekor, tiap perlakuan terdiri dari 10 ekor keong mas. Analisis data yang digunakanuntuk mortalitas antar perlakuan dengan uji One Way Anova dengan taraf kesalahan 5%. Apabila terdapatperbedaan yang signifikan, kemudian dilanjutkan dengan uji Duncan’s Multiple Range Tes (DMRT) padataraf 5%. Hasil uji yang diperoleh dengan analisis probit yang membuktikan kadar aman (10% LC50-48jam) sebesar 0,251 mL, sedangkan tingkat toksisitas sari biji buah pucung terhadap keong mas (LC50-96jam) sebesar 0,282 mL, berdasarkan skala Loomis dapat diketahui bahwa tingkat daya racun sari bijibuah pucung luar biasa toksik.Kata kunci : pucung (Pangium edule), sari biji buah pucung, keong mas (Pomacea canaliculata),pestisida nabati, mortalitas.
Ocular prosthesis for post evisceration socket often has feeble adaptation to the surrounding tissue due to high sensi-tivity. Excessive pressure given by impression technique would lead to irritably intaglio and bulky palpebral contour of the prosthesis. This article describes a modified method of functional impression which made it easier not only to record the tissue bed surface of the defect but also to get the right contour of the palpebral surface at the same time. A 60-year-old male came to Dental Hospital Universitas Sumatera Utara with evisceration defect as a result of traumatic injury 40 years ago. He complained a facial disfigurement that made him formidable with social interacti-on. Pressureless impression combined with calibrated tray was planned for the patient. Light body PVS material was injected into the socket under slight pressure and the conformer made from visible light cure acrylic resin was in position as a tray. Vertical and horizontal lines marked in the conformer calibrate with the facial marking as a gui-dance for 3-D position. The method is intended to get the fast, accurate position offering the patient ocular prosthesis with great comfort as well as to provide facial contours that improve the patient's psychological and physical outlook.
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