R Z Maarebia

Musamus Merauke University

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i-10 index

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Document Type

Co-Authors

Novike Bela Sumanik

Musamus Merauke University

Evy Nurvitasari

Musamus Merauke University

Henie Poerwandar Asmaningrum

University of Malaya

Abraham Laurens Rettob

Musamus Merauke University

Yorinda Buyang

Musamus Merauke University

Jumriah Langkong

Hasanuddin University

J Genisa

Hasanuddin University

Paulina Taba

Hasanuddin University

Abdul Wahid Wahab

Hasanuddin University

Yenni Pintauli Pasaribu

Musamus Merauke University

Cooperative Institutions

Musamus Merauke University

Hasanuddin University

Sepuluh Nopember Institute of Technology

Universitas Gadjah Mada

NOAA National Marine Fisheries Service Southeast Fisheries Science Center

University of Malaya

State University of Malang

Weatherford College

Bandung Institute of Technology

State University of Makassar

Author Statistics

Papers

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The effectiveness of applying contextual approach based on environment toward chemistry learning achievement and scientific attitude

IOP Conference Series Earth and Environmental Science (2019)

Evy Nurvitasari R Z Maarebia Novike Bela Sumanik

Abstract This research aimed to know the effectiveness of applying contextual approach based on environment toward chemistry learning achievement and scientific attitude students in aspect (a) differences of students chemistry learning achievement if the early knowledge chemistry uses statistically (b) differences of students scientific attitude in experiment class after the teaching-learning process with contextual approach based on environment (c) differences of students scientific attitude between experiment and control class. The method of this research is to experiment with one-factor design (chemistry learning), two samples (control and experiment class) and one covariable (early knowledge students). In the experiment class using a contextual approach based on the environment while in control class using a conventional approach. Chemistry learning achievement measured with an achievement test and then analyzed with one way ANCOVA. Scientific attitude measured with scientific attitude questionnaire and then analyzed with one sample and two-sample t-test. Base on the ANCOVA analysis get value F0 = 4,431 with Ftable = 3.96. This matter shows that significant differences in students chemistry learning achievement with the contextual base on environment approach if the early knowledge chemistry uses statistically. Result of one sample t-test shows that the value t = 0,465 with t table = 1,67, it can be concluded that is no significant differences of students scientific attitude in experiment class after teaching-learning process with the contextual base on environment approach. Result of two-sample t-test shows that the value t = 0,05 with t table = 1,67, it can be concluded that is no significant differences of students scientific attitude between experiment and control class.

Analysis of covariance

Sample (material)

Value (mathematics)

10.1088/1755-1315/343/1/012229

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Decrease of lead levels of leachate with banana skin adsorbent

IOP Conference Series Earth and Environmental Science (2019)

Novike Bela Sumanik Evy Nurvitasari R Z Maarebia Jumriah Langkong

The purpose of this study was to provide an alternative by using banana peel adsorbent in reducing lead (Pb) levels in leachate and to find out which types of banana peels were most effective in reducing lead (Pb) levels in leachate. This study uses three types of banana Kepok, ambon, and cavendish. The material was analyzed using atomic absorption spectrophotometry (AAS) and analyzed using the adsorption capacity equation. The results showed that the largest adsorption capacity was adsorbent from Kepok banana peel with an adsorption capacity of 23 mg/g.

Banana peel

Lead (geology)

10.1088/1755-1315/343/1/012172

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Analysis of Student Response to the Utilization of Chemsketch Media in Hydrocarbon Materials

R Z Maarebia Novike Bela Sumanik Henie Poerwandar Asmaningrum

Learning hydrocarbons using Chemsketch media is a new thing learned by students of SMA Negeri 2 Merauke.Research using Chemsketch media aims to analyze how students respond to the use of Chemsketch media in the learning process, especially for hydrocarbon material.The data obtained from this study were in the form of student response questionnaire data.The data obtained were analyzed using descriptive analytical methods to obtain answers to the problems contained in the study.Based on the research results obtained, it is known as many as 78.39% of students gave a positive response to the use of Chemsketch media because learning activities using Chemsketch media make students more active and better understand Hydrocarbon material.

10.2991/assehr.k.201014.096

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The influence of POGIL learning model by mind mapping and summary assignment of salt hydrolysis outcomes

IOP Conference Series Earth and Environmental Science (2020)

Novike Bela Sumanik Evy Nurvitasari R Z Maarebia Yenni Pintauli Pasaribu Yorinda Buyang

Abstract Salt hydrolysis is a difficult subject matter for some students, due to the characteristic aspects of chemical concepts and aspects of the learning model. Overcoming the difficulties of these students, one of them uses POGIL (Process Oriented Guided Inquiry Learning) learning. The POGIL learning model does not direct students in documenting material, so it is accompanied by mind mapping and summary. The purpose of this study was to determine the differences of students’ cognitive learning outcomes in the POGIL learning model by mind-mapping assignment between the students taught using the POGIL learning model with a summary assignment on salt hydrolysis material. This study used a quasi-experimental model with posttest only control group design. The results of this study showed that there were differences in cognitive learning outcomes which shown on the average value of students taught with POGIL learning models accompanied by assignments mind mapping higher compared to students who were taught with the POGIL learning model along with summary assignments.

10.1088/1755-1315/473/1/012136

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Citations (4)

Synthesis and Characterization Of Silver Nanoparticles Using Water Extract of Sarang Semut (Myrmecodia pendans) For Blood Glucose Sensors

Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) (2019)

R Z Maarebia Abdul Wahid Wahab Paulina Taba

The principles of green chemistry in nanotechnology is one of the key issues in nanoscience research. Biosynthesis of nanoparticles using plant extract is an eco- friendly approach which eliminates the need for using physical and chemical techniques. A green synthetic route for the production of stable silver nanoparticles (AgNPs) by using aqueous silver nitrate as metal precursor and Myrmecodia pendans extract as bioreductor and PVA as stabilizer is being reported for the first time. In this case, the synthesis of silver nanoparticles (AgNPs) was carried out by reduction method. The bio-reduction and stabilization of so formed silver nanoparticles was monitored by UV-Vis spectrophotometry. Maximum absorption of AgNPs using Polyvinyl Alcohol (PVA) was at wavelength 408.50 nm, whereas that of AgNPs without using PVA was at wavelength of 408 nm. SEM images showed that the morphology of AgNPs was globular. An average size of silver nanoparticles using PVA and without using PVA was 78.3 and 76.1 nm, respectively. The results of X-Ray Diffraction (XRD) displayed the same peak pattern with that of the standard silver metal showing that the resultant particles are silver nanoparticles having FCC structure. Analysis of glucose levels in blood using silver nanoparticles based sensors showed glucose concentration of 71.71 mg / dL.

Silver nanoparticle

Silver nitrate

Polyvinyl Alcohol

Reducing agent

Spectrophotometry

10.20956/ica.v12i1.5881

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Citations (13)

The Use of The Edmodo Application in Blended Learning to Improve Cognitive Abilities of Senior High School Students

Journal of Physics Conference Series (2020)

Evy Nurvitasari Novike Bela Sumanik R Z Maarebia Abraham Laurens Rettob

Abstract This study aims to improve the cognitive abilities of students of High School 3 Merauke through the use of the Edmodo application in blended learning on the learning of hydrocarbon material chemistry. This research is a classroom action research. The object in this study is the students’ cognitive abilities. The research subjects were students of class XI MIPA 7 High School 3 Merauke. The results showed that the use of Edmodo applications in blended learning on the learning of hydrocarbon chemistry material can improve students ‘cognitive abilities with the percentage of classical completeness of students’ cognitive abilities reaching 76.47% in cycle I and 85.29% in cycle II.

Action Research

Blended Learning

Research Object

10.1088/1742-6596/1569/4/042048

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Optimization of precursor concentration and timing of stirring in the formation of silver nanoparticles with and without polyvinyl alcohol (PVA)

IOP Conference Series Earth and Environmental Science (2019)

R Z Maarebia Yorinda Buyang Evy Nurvitasari Novike Bela Sumanik

Abstract The biosynthesis of silver nanoparticles using plants as reducing agents has been reported. In this study used plant extracts Myrmecodia pendans which function as reducing agents and AgNO3 as metal precursors. Silver nanoparticles were successfully synthesized by using plant extracts of Myrmecodia pendans by doing them on variations in concentration and stirring time. In this case a variation of 0.5 mM is used; 1mM; 1.5 mM; 2 mM; and 2.5 mM and the time variation used was 120 minutes and 150 minutes. Analysis using UV-Vis spectrophotometer to determine silver nanoparticles formed in a wavelength range of 400-500 nm. From the results of the study, it was obtained that the concentration of 1 mM with 120 minutes stirring time was the best concentration and the time of formation of silver nanoparticles without stabilizer with absorbance of 2.125 at a wavelength of 408 nm and at a concentration of 2.5 mM with 120 minutes stirring time was the best concentration and stirring time formation of silver nanoparticles with a stabilizer at a wavelength of 413.5 nm with absorbance of 2,636.

Absorbance

Polyvinyl Alcohol

Silver nanoparticle

Stabilizer (aeronautics)

Reducing agent

10.1088/1755-1315/343/1/012245

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Citations (1)

Measurement of standard glucose solution using silver nanoparticle

Journal of Physics Conference Series (2020)

R Z Maarebia Evy Nurvitasari Novike Bela Sumanik

Abstract This study aims to determine the effect of using silver nanoparticles on electrodes to measure standard glucose solutions using the voltammetry method. In this study, silver nanoparticles were used which have been present and have been synthesized and characterized by using the extract agent of water extract of Myrmecodia pendans and AgNO 3 as metal precursors. Detection of glucose with variations in concentration characterized by limit detection obtained a concentration of detection limit of 4.53 mM and sensor sensitivity of 1.91 A.mM −1 1.mm −2 .

Silver nanoparticle

10.1088/1742-6596/1569/4/042047

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Analisis Pembelajaran Kimia Menggunakan Media Modul Pada Siswa Kelas X SMK Negeri 3 Merauke

JRPK - Jurnal Riset Pendidikan Kimia (2020)

Henie Poerwandar Asmaningrum R Z Maarebia

This study aims to analyze the implementation of chemistry learning using module media in terms of student achievement and student responses to the use of modules. This type of research is a descriptive quantitative method. Data collection techniques in the form of test results, observation, interviews, and the results of student questionnaire responses. The research subjects were students of class X Building, totaling 24 students. The results showed that learning chemistry using media modules followed the steps in the form of preparation of study material, practice exercises and evaluation of learning achievement. The use of modules in chemistry learning increases student learning achievement from 48.38 to 78,18. Students also gave a positive response to the use of modules in learning, namely 90% in the feasible category. Another thing that was observed was the implementation of learning supported by internal factors in the form of teacher and student readiness, the mastery of the study material, learning motivation, and the appropriateness of the task with the study material. In addition there is also support from external factors such as the family environment, relationships, and schools. KeywordsLearning, Chemistry, Modules, Learning Achievement, Student Responses

Mastery Learning

Student Achievement

10.21009/jrpk.101.06

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