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Marini Damanik

Universitas Negeri Medan, Medan 20221, Indonesia

Author-ID : 3951482

Biochemistry, Genetics & Molecular Biology Chemistry Education Environmental Science

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The difference of student’s activities and learning outcome with problem based learning using macromedia flash and handout Desi Natalia Purba; Marini Damanik; Saronom Silaban; Lisnawaty Simatupang
Jurnal Pendidikan Kimia (JPKim) Vol 10, No 3 (2018): December
Publisher : Pascasarjana Universitas Negeri Medan

This study aimed to determine the difference of student’s activities and learning outcome with PBL using macromedia flash and handout. The sample were selected using purposive sampling into experimental group I and experimental group II with 60 students. The experimental group I used the PBL using macromedia flash, while the experimental group II used the PBL using handout. The results indicated that the mean scores of student’s activities and learning outcome in the experimental group II were significantly higher than those in the experimental group I. Thus, there was a difference in student’s activities and learning outcome. The correlation test between student’s activities and learning outcome presented that the experimental group I rcount>rtable (0.625>0.361) and the experimental group II rcount>rtable (0.683>0.361), it concluded that there was a positive correlation between student’s activities and learning outcome with PBL using macromedia flash and handout.Keywords:activities; difference; handout; macromedia flash; learning outcome; PBL

The effect of e-learning media application using problem based learning models to activities and results of student learning in salt hydrolysis subject Nisa Humairah; Marini Damanik; Eddyanto Eddyanto
Jurnal Pendidikan Kimia (JPKim) Vol 10, No 3 (2018): December
Publisher : Pascasarjana Universitas Negeri Medan

This study purpose to determine the improvement of chemical learning outcomes and student learning activities that used e-learning media with problem based learning models on the subject of salt hydrolysis. The design was used One Group Pretest and Postest. The instrument used two domains, namely cognitive and affective. Hypothesis testing is carried out using the two-part of t-test. The hypothesis’s test of student learning outcomes obtained tcount = 29.5 while ttable = 2.03 for α = 0.05 and db = 34. Thus tcount> ttable then the hypothesis of Ha is accepted. It concluded that there is an improvement in students' chemistry learning outcomes on salt hydrolysis subject that used e-learning media with problem based learning models. Not only the percentage increased in learning outcomes of 68.4%, but also the percentage of student learning activities of 84% which means very active.Keywords:e-learning; learning activities; learning outcomes; problem based learning

Innovation based learning contextual for thermochemistry topic in senior high school Nurhayani Nurhayani; Marini Damanik; Marudut Sinaga
Jurnal Pendidikan Kimia (JPKim) Vol 10, No 3 (2018): December
Publisher : Pascasarjana Universitas Negeri Medan

The implementation and development of teaching materials purposed to find the topic based on the criteria of National Education Standard Agency (BSNP). The student learning outcomes increase in thermochemistry topic based on the modules contextual. The population in this study were all students of class XI MIA SMAN 2 Percut Sei Tuan consists of 4 classes, while the students of each class were ± 35 people. The sample used in this study consists of two classes randomly selected. The first class as the experimental which given learning module as a contextual-based teaching materials, however the control class was given without it. The instrument used assessment BSNP that shared to 1 teacher and 2 lecturers. The test used multiple-choice with 20 questions that were valid and reliable. As a prerequisite for testing, the hypothesis of learning outcomes both groups of samples were tested for homogeneity using programs Microsoft Excel. The results of the study showed that teaching materials met BSNP criteria that content = 4.16; language = 4.14; presentation = 4.04; Integrity = 4.18 by lecturer. Furthermore, the data achieved of content = 4.32; language = 4.21; presentation = 4.20; integraty= 4.13 by teacher. There are valid criteria and no need revision. The tests performed two sample groups were homogeneous. Hypothesis testing is done by using Paired Sample T-Test with SPSS 21. The hypothesis test concludes that the chemical learning outcomes of students uses teaching materials contextual-based module is higher than the student learning outcome without it in the thermochemistry module.Keywords:contextual; module teaching materials; outcomes learning

The implementation for natural science online lecture with chemistry education base at Nurul Fadhillah school Bandar Setia Zainuddin Muchtar; Sri Adelila Sari; Siti Rahmah; Moondra Zubir; Rini Selly; Marini Damanik
Jurnal Pendidikan Kimia (JPKim) Vol 13, No 1 (2021): April
Publisher : Pascasarjana Universitas Negeri Medan

The Covid-19 pandemic forces learning activities to change from classroom learning to online-based learning. Based on the results of the interview, it was found that the teachers at Nurul Fadhilah school did not yet have the readiness to manage online teaching and learning activities, especially in science subjects. The influencing factors are (1) understanding of basic science concepts (physics, chemistry, biology), (2) understanding of systematic online learning management and (3) mastery of Learning Management System (LMS) technology. Therefore, the aim of this activity is to implement LMS technology in the management of online science learning using a basic conceptual approach to chemistry education. LMS is a technology application developed specifically for managing classrooms, distributing learning materials and enabling collaboration between students and teachers online. The LMS used in this activity is Google Classroom. Based on the data, it is known that 65% of the teachers at Nurul Fadhilah School have not managed online science teaching and learning activities using LMS technology. The results of the systematic online science learning management workshop using the basic concepts of chemistry education and the implementation of LMS technology, especially Google Classroom, showed an increase, as many as 80% of teachers have created, designed and managed classes interactively using Google Classroom LMS technology and have integrated the concept of basic chemistry education in science learning. So that students are more happy and comfortable in learning online and are more disciplined in collecting assignments and teachers are more comfortable in managing and evaluating student assignments.Keywords: Natural science, Learning management system, Google classroom

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

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 quality of tinuktuk in the frozen temperature storage Marini Damanik; Ida Duma Riris; Nora Susanti; Nurul Ramadhaniyah; Jihan Afstria Rinanda
Jurnal Pendidikan Kimia (JPKIM) 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

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.

Co-Authors Desi Natalia Purba Dwy Puspita Sari Eddyanto Eddyanto Ida Duma Riris Jihan Afstria Rinanda Marudut Sinaga Moondra Zubir Nisa Humairah Nora Susanti Nurhayani Nurhayani Nurul Ramadhaniyah Rini Selly Saronom Silaban Simatupang, Lisnawaty Simson Tarigan Siti Rahmah Sri Adelila Sari* Zainuddin Muchtar

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