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All Journal Journal of English Language Teaching Jurnal Sains dan Teknologi Farmasi
Fitriyani Siregar
Fakultas Farmasi Universitas Andalas
Computer Science & IT Education Languange, Linguistic, Communication & Media

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Uji Efek Sitotoksik Ekstrak Etanol Akar Asam Kandis (Garcinia Cowa Roxb.) pada Mencit Putih Betina dengan Metode Micronucleus Assay Wahyuni, Fatma Sri; Siregar, Fitriyani; Dharma, Surya
Jurnal Sains dan Teknologi Farmasi Vol 17 No 2 (2012)
Publisher : Fakultas Farmasi Universitas Andalas

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Abstract

The cytotoxic effect of ethanolic extract of Garcinia cowa Roxb. roots had been investigated on female mice using Micronucleus Assay method. Sixty mice were grouped into five: negative control, positive control, dosage I (extract 30 mg/kgBW), dosage II (extract 100 mg/kgBW), and dosage III (300 mg/kgBW) and then each group were grouped into three groups based on the duration of treatment. The group of mice were induced by cyclophosphamide 50 mg/kgBW intraperitoneally. After 30 hours, the treatment groups were administered the extract orally during 3, 7, and 15 days. After that, mice were sacrificed and the femur bone marrow was taken. Some of cytotoxic parameters were observed i.e micronuclei cells and hematocrit level. The percentage of micronuclei (MN) cells was calculated from the quantity of micronuclei cells of the slides of femur bone marrow by using microscope. Results confirmed that ethanolic extract of Garcinia cowa Roxb. roots decreased percentage of micronuclei cells not significantly (P > 0.05). The most lowering of micronuclei cells was showed by the extract in the dosage of 100 mg/KgBW for 15 days. 
An Analysis of Teacher Talk in Classroom Interaction at SMPN 15 Padang Siregar, Fitriyani; Refnaldi, Refnaldi
Journal of English Language Teaching Vol 13, No 2 (2024)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jelt.v13i2.128259

Abstract

This research analyzes teacher talk spoken in the classroom. From this research, we see what categories are often used in class. The design of this research is descriptive. The subjects of this research are two teachers who teach English classes at SMPN 15 Padang. There are two teachers, a man and a woman who teach the English class. The teachers have more than five years of teaching experience and are certified as school teachers. In this study, researchers focused on teacher talk and the function of teacher talk in classroom interactions in English classes. Researchers obtained data by recording videos of interactions in the classroom. The categories of types of teacher talk contain six categories of teacher talk and there are five categories of teacher talk functions. The research results showed that the six categories of teacher talk appeared 447 times, while the question category appeared the most 165 times. The least used category Criticizing students. The teacher conversation function appeared 142 times with the Instruction category appearing 50 times.
Co-Authors Fatma Sri Wahyuni Refnaldi Refnaldi Surya Dharma