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All Journal JBIO: jurnal biosains (the journal of biosciences) Jurnal Pendidikan Kimia (JPKim) AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Indonesian Journal of Chemical Science and Technology Jurnal Sains Boga
Marini Damanik
Chemistry Department, Faculty Of Mathematics And Natural Sciences, Universitas Negeri Medan, Medan, 20371, Sumatera Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences Other

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The implementation of teaching model to induce simson tarigan's concept change (m3pk) to improve student chemistry learning outcomes in the subject of reaction equation class x man binjai Dwy Puspita Sari; Marini Damanik; Simson Tarigan
Jurnal Pendidikan Kimia (JPKim) Vol 10, No 3 (2018): December
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.539 KB) | DOI: 10.24114/jpkim.v10i3.12719

Abstract

This study aims to determine the improvement of students' chemistry learning outcomes by applying M3PK. The population were all students of class X MIA. The sample consisted of two classes, namely class X MIA 2 and X MIA 3 which were taken by random sampling. The first class is used as an experimental class which is taught using the Teaching Model to Induce Change of Concepts, and the second class as a control class which was learnt by using the Direct Instruction. As a prerequisite for testing the hypothesis, the study data of the two sample groups were tested for normality and homogeneity and the data achieved from both sample groups were normal and homogeneous. In testing, the hypothesis obtained the price of tcount> ttable (4.619> 1.670). It shows that the alternative hypothesis (Ha) is accepted and the null hypothesis (Ho) is rejected, which means that the increase in learning outcomes of chemistry students who are learnt by using M3PK is higher than the learning outcomes of chemistry students who are educated using the Direct Instruction. The percentage increased in students' learning outcomes of chemistry learnt by using M3PK was 74.5% while those taught using the Model Direct Instructionwere 64.8%.Keywords:equation reactions; m3pk; learning outcomes
The Effect of CTL Assisted e-LKPD on Increasing Students' Motivation and Learning Outcomes Rahmi Maulidza; Marini Damanik
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol 5, No 2 (2023): OCTOBER 2023 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v5i2.48741

Abstract

The purpose of this study was to determine the effect of e-LKPD assisted CTL learning on student motivation and learning outcomes. Samples were taken by purposive sampling as many as 2 classes, namely experimental classes and control classes. The instruments used were multiple choice tests and motivation questionnaires. Data on student learning outcomes and motivation were analyzed by right-side t-test and correlation test. Correlation test to see the relationship between learning motivation and learning outcomes. The results of the cognitive t-test obtained tcount > ttable (3.401> 1.668) which shows Ho is rejected and Ha is accepted, meaning that there is an effect of the CTL learning model assisted by e-LKPD on the learning outcomes of students on acid-base material. The t-test results of learning motivation obtained tcount> ttable (2.191> 1.668) which shows Ho is rejected and Ha is accepted, meaning that there is an effect of CTL learning assisted by e-LKPD on student learning motivation. The correlation results obtained tcount> ttable (0.495> 0.339) indicate that student learning motivation is positively and significantly correlated with student learning outcomes using CTL learning assisted by e-LKPD.
The quality of tinuktuk in the frozen temperature storage Marini Damanik; Ida Duma Riris; Nora Susanti; Nurul Ramadhaniyah; Jihan Afstria Rinanda
Jurnal Pendidikan Kimia Vol. 16 No. 1 (2024): April
Publisher : Pascasarjana Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jpkim.v16i1.55861

Abstract

Tinuktuk is considered nutritious and able to boost immunity. A local product based on natural resources and spices in Indonesia. The different concentrations of the main ingredients used in the production of tinuktuk produce good quality and nutrition for safe, healthy, and nutritious consumption. So far, there is no optimum composition of tinuktuk and also quality analysis during the storage period in the frozen temperature of tinuktuk, so this research is necessary. In this research, the roasting method is used for the drying process of making tinuktuk. The roasting process is one of the isothermal drying processes. The purpose of this study was to determine the quality characteristics of tinuktuk during storage at -10°C for 56 days which is analyzed every 7 days. Tinuktuk characteristic parameters include pH, moisture content, ash content, and microbial analysis. The results of the research that have been carried out are 30%: 70% and 40%: 60%, which have similarities with the results of the analysis of tinuktuk that has been marketed, namely the 30%: 70% ratio, wherein the 30%: 70% ratio the pH analysis decreases steadily from 6.3 to 5.9. Ash content analysis resulted in a stable decrease from 7% to 5%. Microbial analysis with ALT testing resulted in stable data during storage at 2.5 x 102 colonies/g. Antioxidant analysis of 30%:70% ratio resulted in antioxidant IC50 data of 93, 4 ppm to 183.6 ppm.
The Effect of the iSpring - Assisted PBL Model on Students' Literacy HOTS on Reaction Rate Seli Cornelya Marantara Tambunan; Marini Damanik
Jurnal Inovasi Pembelajaran Kimia (Journal of Innovation in Chemistry Education) Vol 6, No 2 (2024): OCTOBER 2024 EDITION
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jipk.v6i2.59859

Abstract

Every student is enforced to master scientific literacy in everyday life because this literacy is relevant to students' ability to related issues about science and their ideas as citizens. This research aims to analyze students' HOTS literacy scores using the PBL model with the assistance of iSpring Presenter media on reaction rate material to the hypothesized value of 70 and to present the aspects of HOTS literacy that are experiencing the most progress. This research used a One-Group Pretest-Posttest design. Based on test validation, 20 questions out of 22 valid questions were used (12 questions on the C4 aspect of reasoning, 6 questions on the C5 aspect of reasoning, and 2 questions on the C6 aspect of reasoning). Data analysis shows that the N-Gain value meets the high criteria, namely 70.03%. Hypothesis test analysis shows that ha is accepted or exceeds what was hypothesized (70), the tvalue is 6.96, and the ttable is 2.03 which is outside the ho acceptance area with a two-party test. As well as the results of the analysis of the HOTS aspect of literacy that was most developed in this research was the C5 aspect of reasoning with a percentage of 73.44%.
Co-Authors Ani Sutiani Ayi Darmana Desi Natalia Purba Eddyanto Eddyanto Emilia, Esi Hafni Indriati Nasution Hafni Indriati Nasution Ida Duma Riris Jihan Afstria Rinanda Juliarti lady violita Marudut Sinaga Moondra Zubir Moondra Zubir Moondra Zubir Moondra Zubir Nisa Humairah Nora Susanti Nurhayani Nurhayani Nurul Ramadhaniyah Osi Annauli G Rahmi Maulidza Rasita Purba Rini Selly Rini Selly Rini Selly Risti Rosmiati Sari, Dwy Puspita Saronom Silaban Seli Cornelya Marantara Tambunan Serimawarni Serimawarni Simatupang, Lisnawaty Simson Tarigan Siti Rahmah Siti Rahmah Sri Adelila Sari* Syahputra, Ricky Andi Syarifah Ayuni Tia Aulia Surbakti Tyas Permatasari Tyas Permatasari Vrili Coirala Rama Uli Siregar Yosi Santika Silitonga Zainuddin Muchtar