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Jurnal Penelitian Pendidikan IPA (JPPIPA)
Published by Universitas Mataram
ISSN : 24602582     EISSN : 2407795X     DOI : -
Core Subject : Science, Education, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics
Science Educational Research Journal is international open access, published by Science Master Program of Science Education Graduate Program University of Mataram, contains scientific articles both in the form of research results and literature review that includes science, technology and teaching in the field of science. The Science Educational Research Journal is published twice in a year in January and July editions. The editors receive writing in Indonesian or English, either from the university or from outside the university.
Arjuna Subject : -
Articles 83 Documents
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Search results for , issue "Vol. 8 No. 3 (2022): July" : 83 Documents clear
Analysis Validation of Quantum Physics Learning Devices using Blended Learning Models to Improve Critical Thinking and Generic Science Skills of Students Aris Doyan; Susilawati Susilawati; Saprizal Hadisaputra; Lalu Muliyadi
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 3 (2022): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i3.1920

Abstract

This study aims to develop a quantum physics learning device with a blended learning model to improve the critical thinking and generic science skills of students. The learning device is made with a 4D development model which includes four steps, namely: define, design, develop, and disseminate. The learning tools developed to consist of semester program plans (SPP), student activity sheets (SAS), quantum physics teaching materials, instruments to measure critical thinking skills, and generic science skills of students. The validity results show that the quantum physics learning device with the blended learning model has an average value of more than 4.20. This shows that the learning tools are very feasible to improve the critical thinking and generic science skills of students.
Influence Of Co Doping On Structural And Band Gap Energy Properties Of ZnO Based Varistor Ceramic Ting Lee Mon; Nur Quratul Aini Ismail; Nor Kamilah Sa’at; Raba'ah Syahidah Azis; Mohd Hafiz Mohd Zaid
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 3 (2022): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i3.1945

Abstract

Photopyroelectric (PPE) technique has been widely used in applied science and technology fields including the study of materials in thermal and optical properties. The sample, Zn1-xCox (x= 0.4, 0.8, 1.2, 1.6, 2.0 wt%) was prepared using solid state method sintered at 1200 ͦC to study the effect of concentration on the energy band gap (Eg). XRD, SEM with EDX analysis were used to characterise the materials' structure, morphology, and density. The PPE setup is used to determine band gap energy (Eg) values. The Eg shows the decreasing trend when the concentration of CoO increases
Isolation, Molecular Identification and Antibacterial Activity of Endophytic Bacteria from the Bark of Plumeria acuminata Lalu Zulkifli; Dewa Ayu Citra Rasmi; AA Sukarso; Yayuk Andayani; Dwi Soelistya Dyah Jekti
Jurnal Penelitian Pendidikan IPA Vol. 8 No. 3 (2022): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v8i3.2249

Abstract

Endophytic bacteria are able to produce bioactive compounds that are important for applications in the medical field. This study aims to isolate, identify and test the antibacterial activity of endophytic bacteria from the bark of Plumeria acuminata growing in the Mataram area. Isolation was carried out using four types of media, namely NA, TSA, MAC, and BHI. The well diffusion technique was used to test the inhibitory ability of the endophytic bacterial extract against the test pathogenic bacteria. The four test bacteria used were S. aureus, B. cereus, P. aeruginosa, K. pneumoniae. Isolates that showed inhibitory activity were then identified morphologically, biochemically and molecularly based on the 16S rRNA gene. The results of the isolation process obtained 35 colonies. where 9 of them inhibit the growth of test bacteria. There were 2 isolates that able to inhibit the growth of 4 types of test bacteria with an average clear zone diameter of very strong category (21–30 mm), namely isolates T1 and T2. The N2 isolate had the highest average inhibition zone compared to all isolates of endophytic bacteria, which was 32 mm, but was specific for P. aeruginosa. Two isolates, namely B1 and M3 gave various growth inhibitory effects with strong to very strong categories. Other isolates showed various antibacterial effects against at least 2 types of test bacteria. S. aureus was the most resistant pathogenic bacteria to the treatment of endophytic bacterial isolate extract. The cell shape of all endophytic isolates was streptobacillus with or without spores, and 50% of them were Gram-positive. Molecular identification based on the 16S rDNA gene grouped the 9 isolates into 2 main clusters, namely the genus Bacillus and the genus Pseudomonas. Isolates that were closely related to the genus Bacillus showed higher inhibitory activity than those of Pseudomonas. The results showed that isolates of endophytic bacteria from the bark of P acuminata have the potential as an important source of antibacterial substances.

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