cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Saprizal Hadisaputra
Contact Email
rizal@unram.ac.id
Phone
+6287738066422
Journal Mail Official
pijarmipa@unram.ac.id
Editorial Address
Univesitas Mataram. Jalan Majapahit No 62 Mataram, Lombok, NTB. 83125. Indonesia
Location
Kota mataram,
Nusa tenggara barat
INDONESIA
Jurnal Pijar MIPA
Published by Universitas Mataram
ISSN : 19071744     EISSN : 24601500     DOI : -
Core Subject : Science, Education,
Biochemistry, Genetics & Molecular Biology Chemistry Mathematics Physics
Jurnal Pijar MIPA (e-ISSN: 2460-1500 & p-ISSN: 1907-1744) is an open-access scientific periodical journal published by the Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA publishes original articles on current issues and trends in mathematics-science-science education studies. In addition, this journal addresses issues concerning environmental education and environmental science. The journal scopes are: a. Physics and Physics Education b. Chemistry and Chemistry Education c. Biology and Biology Education d. Natural Science and Science Education e. Mathematics and Mathematics Education f. Environmental and Environmental Education
Arjuna Subject : Umum - Umum
Articles 1,179 Documents
 99   100   101   102   103 
A comparison of image quality of cerium oxide nanoparticles and iodine contrast agents in computed tomography scan Nasrullah, Faiz; Nurhasanah, Iis; Triadyaksa, Pandji; Rukmono, Dito Andi
Jurnal Pijar Mipa Vol. 18 No. 6 (2023): November 2023
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v18i6.6004

Abstract

Computed tomography (CT) scan, with iodine-based contrast, produces good image quality by improving the visualisation of relatively low-contrast internal body structures. However, the impact of using iodinated difference should be considered in patients susceptible to contrast allergy and renal impairment. Therefore, alternative contrast materials, such as cerium oxide nanoparticles (CeO2 NPs), must be used, with biocompatible properties and strong X-ray attenuation capabilities. This study compared the CT scan image quality of CeO2 NPs and iodinated contrast agents. This experimental study started by preparing a suspension of CeO2 NPs and iodine in aquabidest at a concentration of 500 ppm. The suspension was scanned using a CT scan with a helical scanning method. The exposure coefficient parameters were set for the tube voltage of 80 kV, Field of View of 28 cm, slice thickness of 5 mm, and tube current time of 150 mAs, 200 mAs, and 250 mAs. Then, CT images in DICOM data format were processed using MicroDICOM Viewer software. The quality of the CT scan images was analysed based on the CT number value, noise level, and contrast resolution. The images of CeO2 nanoparticles have higher CT values, lower noise levels, and better contrast resolution than those of iodine contrast agents. The results show that the CT image results of CeO2 NPs have better quality than those of iodine-containing contrast agents.
Construction of Kedisan Pier to Increase Tourist Visits and Water Quality in Lake Batur, Bali Agustina, Arik; Aprinica, Ni Putu Isha; Muliadiasa, I Ketut; Astina, Made Arya
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i1.6010

Abstract

Kedisan Pier gives a new feel of traveling in Batur, with a concept like a pier in South Korea, but also provides views of Lake Batur and Mount Batur simultaneously. Tourists not only visit restaurants, hot springs, hikes, and stay overnight but can also visit the Kedisan Pier Area. The increase in tourist visits influences the condition of water quality in Lake Batur. This study aims to determine the influence of the construction of Kedisan Pier on tourist visits and the quality of Lake Batur water. This study used a purposive sampling method; sampling was carried out at three points representing settlements and agriculture, water bodies/middle of lakes, and dock. The samples were tested for pH and temperature in the field and COD parameters in the laboratory. Furthermore, these three parameters are compared with Class 1 lake water quality standards in Government Regulation 22 of 2021. Based on the results, it is known that the pH and COD in the three locations exceed the class 1 water quality standard, which is 10 mg / L. pH in the range of 9.2 – 9.5. Increased COD concentration compared to the quality standard at point 1 by 127%; Point 2 is 82%, and Point 3 is 144%. Domestic activities cause the high pH and COD values at these three points—the highest COD value in the Kedisan Pier area. The construction of Kedisan Pier impacts the increasing number of tourists but also causes a decrease in Lake Batur's water quality. Based on this, human awareness is needed to increase tourism while maintaining the quality of waters for the future benefit of humans, flora, and fauna. In addition, further research needs to be carried out using other microbiological and chemical parameters to see the quality of Lake Batur waters.
Macroinvertebrates as a Bioindicator of Water Quality in the Jangkok River, Lombok Island Nurhairani, Nurhairani; Candri, Dining Aidil; Zamroni, Yuliadi
Jurnal Pijar Mipa Vol. 19 No. 4 (2024): July 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i4.6052

Abstract

Rivers are water bodies in open ecosystems where activities in the environment have an impact on river water quality. Monitoring of water quality is necessary to preserve aquatic resources. One of the river basins on Lombok Island is the Jangkok River. This river has a high utility, so water quality monitoring is needed. Macroinvertebrates are one of the best biological indicators for water quality monitoring. The objective of this study is to determine the diversity of macroinvertebrates and the quality of Jangkok River waters by using macroinvertebrates as bioindicators so that the results of this study can be used as a reference basis for the future use of Jangkok River water in the allocation of community needs. The method used in this research is biomonitoring with macroinvertebrate bioindicators, and the technique used in sampling is purposive sampling. Sampling was conducted at three stations, namely the upstream, middle, and downstream parts of the Jangkok River. The data analysis used was the Family Biotic Index (FBI) supported by physical-chemical parameters. The results of this study showed that the macroinvertebrates identified were 721 individuals consisting of 5 classes, 17 orders, and 36 families. The water quality of the Jangkok River, based on the FBI value in the upstream and middle sections, is still included in the good category, while in the downstream section, it falls into the very bad category.
Waste cellulose extraction and analysis decortication sisal plant (Agave sisalana) Sumbawa Labangka Widyawati, Fauzi; Malik Fajar Fatoni; Emsal Yanuar; Hidayat, Syamsul
Jurnal Pijar Mipa Vol. 18 No. 6 (2023): November 2023
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v18i6.6065

Abstract

Waste utilization of decortication Sisal plants is minimal compared to the amount of waste produced, especially the cellulose content in the waste decortication sisal plant. This research aims to extract waste cellulose decortication sisal plants using acid and alkaline solutions with variations in NaOH solutions of 0%, 2%, 4%, 6%, and 8%. The process used is alkalization, bleaching, and acid hydrolysis by method analysis. Next, testing using SEM and FTIR methods is done to determine the morphology of waste cellulose decortication in the resulting sisal plants and the cellulose, lignin, and hemicellulose content in the waste decortication sisal plant. Before treatment, the cellulose content of the waste is given to decorticate the sisal plant at 31%, and after alkalization treatment, the cellulose content is 54%. Cellulose content in waste decortication Sisal plants in each process increases with found O-H bonds at waves 3000-3600 cm-1, C-H bonds belong to hemicellulose at wave numbers 2800-3000 cm-1 and remove lignin, which is in the waste decortication Sisal plants did not find C=C bonds belonging to lignin at waves of 1200-1300 cm-1. FTIR test results show an increase in cellulose intensity, with the resulting cellulose measuring 28.64762 µm and 33.69369 µm. The increase in cellulose intensity in FTIR is directly proportional to the SEM results, which show a loose layer with lignin and hemicellulose that has been eroded from the cellulose.
Identifying Student Misconceptions on Momentum and Impulse Using Four-Tier Diagnostic Test Instrument with CRI Paramita, Uci Vebia; Jauhariyah, Mukhayyarotin Niswati Rodliyatul
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i1.6086

Abstract

Identification of students' misconceptions is crucial in Physics learning as an evaluation tool to address and reduce these misconceptions. This study aims to assess the quality of a four-tier diagnostic test using the CRI instrument, assisted by JotForm, and describe the profile of students' misconceptions related to momentum and impulse. The quality of the instrument is evaluated based with validity and reliability. The research follows the ADDIE (Analysis, Design, Development, Implementation, and Evaluation) method. The instrument is developed during the analysis, design, and development stages. The implementation and evaluation stages involve capturing the profile and causes of students' misconceptions. The instrument's quality is assessed based on theoretical validity, which reached 89.29%. Empirical content validity haved percentages of false positives 6.93%and false negatives 6.53%. The empirical validity of the construct, with a significance level of 0.05, resulted in an rtableof 0.273. From the 15 questions tested, 12 questions were found to have empirical validity, and a reliability score of 0.475 was obtained. The study revealed that 3 students had low misconceptions, 14 students had medium misconceptions, and 6 students had high misconceptions. The causes of students' misconceptions were primarily false positives and humanistic thinking, accounting for 28.56%. In conclusion, the instrument developed in this study is valid and reliable, and it effectively identifies the profile and causes of students' misconceptions.
Cyclic Voltammetry Method for Analysis of Phosphate Concentration in Water Agustin, Qomariyah; Setiarso, Pirim
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i1.6090

Abstract

Phosphate is a nontoxic element but a limiting element for productivity. Several methods have been established to analyze the phosphate concentration in water. This study aims to analyze phosphate concentration in water using the voltammetry method using cyclic voltammetry. Cyclic voltammetry is an electroanalytical method that measures the current outcome of oxidation-reduction reactions in response to the potential. The current outcome is directly proportional to the phosphate concentration in the solution. The calibration curve was formed from the KH2PO4 standard solution using concentrations of 0.1 mg/L, 0.2 mg/L, 0.4 mg/L, 0.8 mg/L, and 1.6 mg/L. The voltammogram showed that the analyte does not have an anode peak current (Ipa), which means that the analyte solution did not have an oxidation reaction, so the cathode peak current (Ipc) value was used. Based on the calibration curve, the linear regression graph with a straight-line equation is y = -0,00000645632x - 0,000208737 with R2 of 0,99737. Meanwhile, this cyclic voltammetry method was validated by calculating the LOD and LOQ values; the results are 0.1034 mg/L and 0.3134 mg/L, respectively. Hence, based on the analysis of phosphate concentration in water samples, this method works satisfactorily and is suitable for routine analysis because of its advantages.
Science Learning Motivation Among Students at Junior and Senior High Schools in Sungai Penuh: A Comparative Study Satrianti, Elza; Pranata, Ogi Danika; Tiara, Tiara
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i1.6101

Abstract

Student motivation in science learning has significantly changed during the pandemic. Consequently, it is crucial to trace how student motivation in science has evolved. This study uses a descriptive and comparative research approach to obtain a general overview of students' science learning motivation and compare the levels of student learning motivation, providing a comprehensive overview of student motivation at different educational levels. The total sample size for this study is 104 students, selected using purposive sampling techniques from two schools, junior high school (madrasa) 1 and senior high school 1 Sungai Penuh. A questionnaire on students' motivation for learning science, adapted from a previous study, was utilized to collect student motivation data. Student responses were converted into quantitative data using a Likert Scale of 1 to 5. The collected data were processed and analyzed using descriptive and Mann-Whitney U-test statistics. The results reveal a significant difference in the motivation for learning science between senior high school 1 and junior high school (madrasa) 1 students. The group of students from senior high school 1 exhibited a higher level of science learning motivation than those from junior high school (madrasa) 1. When comparing indicators, no significant differences were found in the motivation of students from junior high school (madrasa) 1 and senior high school 1 Sungai Penuh for learning goal orientation, self-efficacy, and self-regulation. The difference in motivation indicators was only significant in task value. These findings can guide classroom teachers in refocusing their teaching practices and assessing the effectiveness of intervention programs. Exploring other factors across various subjects and school levels is also recommended to gain a more comprehensive understanding of the variations in student learning experiences.
Synthesis and Characterization of Copper Nanoparticles with Bioreductor Carica Dieng (Carica pubescens) Seed Extract Setiani, Fifin; Suyatno, Suyatno
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i1.6124

Abstract

Secondary metabolite compounds in plants act as bioreductors in the metal reduction process and complement inorganic reductants. This study studied the characteristics of copper nanoparticles using Carica Dieng (Carica pubescens) seed extract. The synthesis of copper nanoparticles was carried out using the green synthesis method by reducing CuSO4 10 mM with distilled water extract from Carica Dieng (Carica pubescens) seeds. The Synthesis was carried out with the ratio of the composition of the extract and CuSO4 solution 1:3 at pH 10. Nanoparticles were then characterized using UV-Vis spectrophotometer and PSA (Particle Size Analyzer) instruments. The characterization results using a UV-Vis Spectrophotometer showed a maximum absorption peak at a wavelength of 535 nm; the wavelength is included in the wavelength range of copper nanoparticles, which ranges from 500-700 nm. The particle size distribution analyzed using PSA shows an average size of 14.49 nm; this size is included in the range of nanoparticle sizes, which is between 1-100 nm, thus proving that nanoparticles have been successfully formed, the Poly Dispersity Index (PDI) value obtained is 0.1943 which indicates that the nanoparticle sample is categorized as homogeneous so that it has uniform size uniformity.
Phytochemical Screening and Nanoherbs Synthesis of Ethanol Extract of the Butterfly Pea Flower (Clitoria ternatea L.) with its Characterization Achrifa, Silfia Indah; Suyatno, Suyatno
Jurnal Pijar Mipa Vol. 19 No. 1 (2024): January 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i1.6125

Abstract

Every plant has a different secondary metabolite content, influenced by the location and conditions where the plant grows. Preparations from the butterfly pea flower (Clitoria ternatea L.) extract form have poor bioavailability. One effort to overcome this problem is by formulating it into nanoherbs form. This research aims to determine the phytochemical content and synthesize nanoherbs ethanol extract of butterfly pea flowers. The butterfly pea flowers were extracted using the maceration method, and the resulting thick purplish blue extract was 145.254 grams. The thick extract was analyzed for secondary metabolite content using phytochemical screening, and it was found to contain alkaloids, flavonoids, saponins, triterpenoids, and tannins. Nanoherb synthesis uses the ionic gelation method with an alginate polymer and a CaCl2 cross-linking agent. The synthesis result is a purple nanoherbs colloid with optimal variations in the ratio (10:1). The synthesized nanoherbs were characterized using PSA and obtained particle size results from the optimal variation of 220.4 nm, polydispersity index 0.2550, and zeta potential of -22.5 mV.
Formulation and Physical Evaluation of Papaya Leaf (Carica papaya L.) Ethyl Acetate Fraction Cream Preparation as Anti Acne Against Propionibacterium acne Bacteria Farda, Zais; Rahayu, Titi Pudji; Kiromah, Naelaz Zukhruf Wakhidatul
Jurnal Pijar Mipa Vol. 19 No. 2 (2024): March 2024
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v19i2.6146

Abstract

Acne or acne vulgaris is a disease in the form of inflammation of multiple sebaceous glands caused by the bacteria Propionibacterium acne. Papaya leaves are a plant that can potentially be used as an acne treatment. To determine the antiacne activity of papaya leaf ethyl acetate fraction cream preparations caused by Propionibacterium acne bacteria. The ethyl acetate fraction of papaya leaves are made into a cream preparation with varying concentrations of ten, fifteen, and twenty percent. The results of the cream preparation test met the physical property standards. Still, the viscosity in formulation three did not meet the standards, and formulas two and three did not meet the cream stability test standards. Antibacterial tests show that all formulas have inhibitory power against bacteria. The average inhibition zone results in formula one, formula two, and formula three were 4.99 ± 0.48 mm, 6.85 ± 0.48 mm and 10.12 ± 1.42 mm. Formula One papaya leaf fraction cream fulfills all the physical characteristics of the preparation. All papaya leaf ethyl acetate fraction cream preparations are antibacterial against Propionibacterium acne. So, research can be developed using the ethyl acetate fraction of papaya leaves in various preparations, and activity tests against other bacteria can be carried out.

Page 101 of 118 | Total Record : 1179

 99   100   101   102   103 

Filter by Year

2009 2026


Reset
Filter By Issues
All Issue Vol. 21 No. 1 (2026) Vol. 20 No. 8 (2025): Special Issue Vol. 20 No. 7 (2025) Vol. 20 No. 6 (2025) Vol. 20 No. 5 (2025) Vol. 20 No. 4 (2025): Special Issue Vol. 20 No. 3 (2025) Vol. 20 No. 2 (2025) Vol. 20 No. 1 (2025) Vol. 19 No. 6 (2024): November 2024 Vol. 19 No. 5 (2024): September 2024 Vol. 19 No. 4 (2024): July 2024 Vol. 19 No. 3 (2024): May 2024 Vol. 19 No. 2 (2024): March 2024 Vol. 19 No. 1 (2024): January 2024 Vol. 18 No. 6 (2023): November 2023 Vol. 18 No. 5 (2023): September 2023 Vol. 18 No. 4 (2023): July 2023 Vol. 18 No. 3 (2023): May 2023 Vol. 18 No. 2 (2023): March 2023 Vol. 18 No. 1 (2023): January 2023 Vol. 17 No. 6 (2022): November 2022 Vol. 17 No. 5 (2022): September 2022 Vol. 17 No. 4 (2022): July 2022 Vol. 17 No. 3 (2022): May 2022 Vol. 17 No. 2 (2022): March 2022 Vol. 17 No. 1 (2022): January 2022 Vol. 16 No. 5 (2021): November 2021 Vol. 16 No. 4 (2021): September 2021 Vol. 16 No. 3 (2021): Juni 2021 Vol. 16 No. 2 (2021): Maret 2021 Vol. 16 No. 1 (2021): Januari 2021 Vol. 15 No. 5 (2020): Edisi Khusus Penelitian Pengembangan Pengkajian Ilmu dan Pengajaran MIPA Vol. 15 No. 4 (2020): September Vol. 15 No. 3 (2020): Juni Vol. 15 No. 2 (2020): Maret Vol. 15 No. 1 (2020): Januari Vol. 14 No. 3 (2019): September Vol. 14 No. 2 (2019): Juni Vol. 14 No. 1 (2019): Maret Vol. 13 No. 2 (2018): September Vol. 13 No. 1 (2018): MARET Vol. 12 No. 2 (2017): September Vol. 12 No. 1 (2017): Maret Vol. 11 No. 2 (2016): SEPTEMBER Vol. 11 No. 1 (2016): Maret Vol. 10 No. 2 (2015): September Vol. 10 No. 1 (2015): Maret Vol. 9 No. 2 (2014): September Vol. 9 No. 1 (2014): Maret Vol. 8 No. 2 (2013): September Vol. 8 No. 1 (2013): Maret Vol. 7 No. 2 (2012): September Vol. 7 No. 1 (2012): Maret Vol. 6 No. 2 (2011): September Vol. 6 No. 1 (2011): Maret Vol. 5 No. 2 (2010): September Vol. 5 No. 1 (2010): MARET Vol. 4 No. 2 (2009): September Vol. 4 No. 1 (2009): Maret More Issue