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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
 74   75   76   77   78 
Fortification of Mangrove Crab Shell Flour (Scylla serrata) as a Mineral Source in Functional Cookie Formulation Widnyani, Ida Ayu Putu Ary; Putra, Anak Agung Ngurah Dwi Ariesta Wijaya
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.7931

Abstract

The importance of calcium and magnesium intake for health, especially bones, teeth, and the nervous system, encourages the development of functional food products rich in minerals. Mangrove crab shell (Scylla serrata) is a waste with calcium-magnesium content that is beneficial for health. This study aims to determine the potential calcium and magnesium content in cookies fortified with mud crab shell flour. The research design used a complete randomised design (CRD). Crab shell flour fortification concentration was 0%, 3%, 6%, 9%, 12%, 15%. Repetition was done 4 times. Data were analysed using the variance analysis (ANOVA) method. The results significantly affected increased calcium and magnesium levels of cookies fortified with mud crab shell flour. The calcium content of cookies ranged from 65.325 – 1,802.773 mg/kg, and magnesium in cookies ranged from 82.719 – 188.553 mg/kg, so cookies with the fortification of mangrove crab shell flour can be used as an alternative functional food product for calcium and magnesium mineral sources.
Functional Food Innovation of Yogurt From Breadnut Seeds (Artocarpus camasi): Basic Formulation and Quality Analysis Sintyadewi, Putu Rima; Yoga , Wahyu Krisna
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.7932

Abstract

Yogurt is one of the dairy products fermented by lactic acid bacteria (LAB) that has long been recognised as a functional food. Breadnut seeds (Artocarpus camansi) have the potential as prebiotics to stimulate LAB growth during yogurt fermentation so that the functional effects of this plant-based yogurt can be optimised. In addition, breadnut seeds are also reported to contain essential amino acids and have high antioxidant activity. The purpose of this study was to determine the best formulation of breadnut seed dairy and LAB type (L. bulgaricus and S. termophilus) adjusted to the quality standards of SNI (2981-2009) yogurt, including pH test, total titratable acid, proximate test (water, fat, protein, and ash content), and microbiological test (total LAB). The design used in this study was a completely randomized design (CRD) with two factorials. The first factor was the formulation of breadnut seed dairy with UHT milk with four treatments, namely P1 (70%:30%), P2 (50%:50%), P3 (30%:70%), and P4 (100% breadnut seed dairy). The second factor is the type of LAB stater with three treatments, namely S1 (L. bulgaricus), S2 (S. thermophilus), and S3 (combination of both). The recommended formulation for breadnut seed yogurt is 100% breadnut seed dairy with a combination of L. bulgaricus and S. thermophilus staters (P4S3). The P4S3 formulation has met the quality standards of yogurt by SNI 2981:2009, including ash content, fat content, protein content, total acid and pH, and total LAB. The P4S3 formulation has an advantage over other formulations by having a lower fat content of 2.37% and a higher protein content of 3.71% compared to animal milk. Breadnut seed yogurt with P4S3 formulation contains a total LAB 3.02 x 107, which has potential as an alternative functional drink.
Development of Lucky Draw Chemist Based on the Website as Learning Media to Improve Students Analysis Skills in Chemical Bonding Material Sukma, Shinta Irawati; Rusmini, Rusmini
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.7953

Abstract

The difficulty in understanding chemistry material generally is caused by the process of conveying information that is not optimal between teachers and students. Therefore, an effort is needed to optimize chemistry learning in the classroom. Learning media is required to improve students' analysis skills in the continuity of a good learning process. There are many types of learning media, one of which is in the form of a website. This study aims to develop the Lucky Draw Chemist media based on the website to improve students' analysis skills in chemical bonding material. This study refers to a 4D design with three stages: define, design, and development. The target of this study is the feasibility of the Lucky Draw Chemist media based on the website based on expert assessment (Chemistry lecturers and chemistry teachers). The results showed that the validity obtained in each assessment aspect was ≥ 4, with the category "good" being valid. Based on these results, the Lucky Draw Chemist media based on the website developed is feasible to be implemented in school learning on chemical bonding material for grade XI high school students.
Application of E- worksheet Oriented on PBL Model to Improve Critical Thinking Skills on Acid-Base Material Azizah, Maharani Puspita Nur; Muchlis, Muchlis
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.7970

Abstract

Humans often interact with substances containing acids and bases daily. Learning in schools in grade XI, namely in phase F, one of the element achievements that students must complete is that students can use the concept of acids and bases in everyday life. Students are expected to have critical thinking and open minds through scientific work increasingly and, at the same time, strengthen the profile of Pancasila students, especially honest, objective, critical reasoning, creative, independent, innovative, collaborative, and globally diverse. The objective of the research will be to enhance students' critical thinking ability in E-worksheet learning-oriented Problem-Based Learning models within the subject matter of acid and base. The research design used is a descriptive quantitative approach with a pre-experimental design using a "Pretest-Posttest Control Group design ". The sample used in this research was 36 students in two classes XI of SMAN 1 Waru, Sidoarjo City. Data were collected using observation sheets, tests, and questionnaires. Two lecturers and a chemistry teacher validated the instruments to collect data. Data analysis used N-Gain to explain how much students' critical thinking skills increased. It was found that students' critical thinking skills increased significantly, with 63,9% of students in class XI-1 and 83,3% in class XI-5 obtaining N-Gain scores included in the high category, which falls into a high category. The results of the study confirm that E-worksheets oriented towards PBL are effective in developing critical thinking skills in chemistry among students, especially on the topic of acids and bases.
Development of Android CHEMDIC Mobile Learning to Prevent Student Misconceptions on Periodic System of Elements Material Rahmadhani, Muhammad Zidan; Sukarmin, Sukarmin
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.7977

Abstract

Chemistry is a multidimensional discipline that contains concepts from simple to complex and concrete to abstract. This makes it difficult for students to understand chemistry and causes a lot of misconceptions. Facts in the field show that only some students understand the concept of the periodic system of elements. In preliminary research, mobile learning has been studied and can improve the effectiveness of individual learning for students anywhere and anytime. This study aims to determine the feasibility of CHEMDIC mobile learning in preventing student misconceptions in the context of the periodic system of elements. This feasibility is reviewed based on the validity and practicality of mobile learning in preventing student misconceptions. The methodology in this study is Research and Development (R&D) using the 4D development model proposed by Thiagarajan with the following stages: define, design, develop, and disseminate. However, this research is limited only to the development stage due to several considerations such as time, effort, and facilities. The limited trial was carried out with 15 students of SMAN 1 Krian Sidoarjo who had obtained learning materials in the context of the periodic system of elements and were selected based on the largest number of students who were included in the category of not understanding concepts based on the results of the pretest. CHEMDIC mobile learning is declared valid if it fulfils the minimum mode score of 4, while it is stated as practical if it fulfils the minimum percentage of ≥61%. This research shows the results of the validity of CHEMDIC mobile learning with the acquisition of content validity mode scores of 5 with a very valid category and a construct validity mode score of 4 with a valid category. Then, practicality, with the acquisition of a percentage in the student response questionnaire of 96%, was in the very practical category. This result shows that android CHEMDIC mobile learning is feasible to prevent students' misconceptions about the material of the periodic system of elements.
Development of Problem-Based Learning Integrated Sasambo Ethnochemistry in Colloid-Based Chemistry Teaching Materials Andayani, Yayuk; Mutiah, Mutiah; Purwoko, Agus Abhi; Sofia, Baiq Fara Dwirani; Hidayanti, Ermia
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.7989

Abstract

This research aims to determine the feasibility of product development for colloid-based chemistry teaching materials and problem-based learning integrated with Sasambo ethnochemistry to increase students' chemical literacy. This research is part of a development research procedure that adopts the 4-D model, with stages to define, design, develop, and disseminate. Test the suitability of teaching materials using a questionnaire to test content validity and construct validity. And reliability. The content and construct validity analysis technique uses the V index, while the reliability of teaching materials uses the kappa moment coefficient (K). The content and construct validity analysis results showed that the criteria were very valid, with a V index of 91.36% and 90.7%. The reliability analysis results of teaching materials obtained a kappa moment coefficient (K) of 0.88 with a very high reliability category. Based on the validity and reliability values, it is concluded that colloid-based chemistry teaching materials and problem-based learning Sasambo's integrated ethnochemistry are very suitable for learning.
Thermodynamic and Conformational Analysis of GTRNase and Lysozyme Proteins Under Thermal Variations using Molecular Dynamics Simulations Huda, Muhamad Mahfuzh; Adawiyah, Rabiatul; Pradana, Andi Rizky
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.7999

Abstract

This study examines the thermodynamic and conformational dynamics of GTRNase and lysozyme proteins under varying temperature conditions using molecular dynamics (MD) simulations. The objective is to evaluate their structural stability, folding behavior, and thermodynamic properties to understand their responses to thermal fluctuations. Protein structures were retrieved from the Protein Data Bank (PDB), refined to remove extraneous molecules, and simulated using GROMACS 2022.2 under NVT and NPT ensembles, spanning temperatures from 270 K to 380 K. The results revealed distinct behaviors for the two proteins. GTRNase exhibited a slight escalation in radius of gyration (Rg) from 1.434 nm at 270 K to 1.445 nm at 380 K, suggesting a marginal conformational expansion. In contrast, lysozyme maintained a consistent Rg of 1.38 nm over the same temperature range, indicating structural compactness. Root mean square deviation (RMSD) data demonstrated increased flexibility in both proteins, with GTRNase escalating from 0.115 nm at 270 K to 0.179 nm at 380 K and lysozyme rising from 0.102 nm to 0.142 nm across the temperature range. Solvent-accessible surface area (SASA) for GTRNase fluctuated between 69 nm² and 73 nm², with the lowest value observed at 300 K and the highest at 370 K. These findings highlight that GTRNase is more susceptible to thermal perturbations than lysozyme, showing greater conformational flexibility and expansion. This research underscores the utility of MD simulations in exploring protein behavior and provides valuable insights for applications in protein engineering and drug design.
Analysis of Pollutant Sources from Community Health Center Activities in Mataram City Nurhidayah, Nurhidayah; Sholehah, Hijriati; Nurhidayatullah, Nurhidayatullah; Mulhidin, Mulhidin; Abdullah, Taufik
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.8003

Abstract

Health centers are health service facilities that produce waste containing microorganisms, toxic chemicals and radioactive materials that are dangerous and can pose risks to health and the environment. The purpose of this study was to determine the sources of health center waste and the types of waste from health center activities. This research method is a type of cross-sectional study, and data collection is done by filling out a questionnaire. The results of the study are the sources of health center waste, namely from the activities of the dental clinic, laboratory, Maternal and Child Health room, and the Emergency Unit room. The types of health center waste are liquid, domestic, solid medical, and toxic and hazardous. For the processing of liquid waste, all health centers in Mataram City have adequate wastewater treatment plants, either with a biofilter wastewater treatment plant system or other types of wastewater treatment plants, from 11 health centers, which have carried out sorting and have temporary storage places, namely 8 health centers. The process of managing medical waste involves sorting, transportation, storage and final processing with a third party. The weak point of B3 waste management is in the recording and sorting system of B3 solid waste and routine reporting of environmental management efforts and environmental monitoring efforts to related agencies that have not been able to be carried out by all existing health center agencies.
Pharmacological Benefits Extracts of Putri Malu (Mimosa pudica Linn.) in Herbal Medicine: A Review Ananda, Meisya Dwi; Mierza, Vriezka; Khaerunisa, Aulia; Apriani, Risa Dwi
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.8017

Abstract

Herbal medicine has a long history of use as an alternative therapy, especially for acute and chronic diseases. There have been many studies on the Putri Malu plant (Mimosa pudica Linn.) to uncover its pharmacological activities. This review paper aims to examine the secondary metabolites present in the extracts of the plant putri malu (Mimosa pudica Linn.) and their potential pharmacological actions. The method used was a Systematic Literature Review (SLR), which collected publications from PubMed, ScienceDirect, and Google Scholar databases. From this process, 15 studies were identified that met the predetermined inclusion criteria. Most of the studies used extracts of the leaves putri malu (Mimosa pudica Linn.) with ethanol solvent as the leading choice for extraction. The pharmacological activities found include antioxidant (20%), anti-inflammatory, anticancer, and antidiabetic (13.3% each) and contain antibacterial, anticonvulsant, antihelminthic, diuretic, hepatoprotective, antimalarial, antidepressant, and antihyperlipidemic (6.7% each). In conclusion, extracts of the plant putri malu (Mimosa pudica Linn.) show great potential for use in herbal medicine. Its wide range of pharmacological actions backs its advantages in treating and preventing several illnesses.
Marine-Derived Chitosan Biopolymers as Antibacterial Agents: A Review Nurhadis, Nurhadis; Kasasiah, Ahsanal; Hitopik, Asman
Jurnal Pijar Mipa Vol. 19 No. 6 (2024): November 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.v19i6.8021

Abstract

The growing issue of bacterial resistance to conventional antibiotics has led to an increasing need for alternative antimicrobial agents. Chitosan, a biopolymer derived from marine organisms such as crustaceans (shrimp, crabs) and mollusks (shellfish), has shown significant antibacterial properties. This systematic review aims to evaluate the antibacterial activity of chitosan extracted from various marine sources against Gram-positive (Staphylococcus epidermidis) and Gram-negative (Escherichia coli) bacteria. A comprehensive search of studies published in the past decade was conducted across multiple databases, using predefined inclusion criteria to identify relevant experimental research that focused on quantitative data, such as inhibition zones. The review analyzes key variables, including chitosan extraction methods, concentrations, and experimental conditions. The results revealed that chitosan exhibited the highest antibacterial activity against E. coli, while S. epidermidis showed moderate susceptibility. Variations in antibacterial effectiveness were attributed to differences in chitosan extraction methods and experimental conditions. Despite these variations, the overall evidence supports the potential of chitosan as an effective antimicrobial agent, demonstrating significant inhibition against a wide range of bacterial strains. The findings suggest that chitosan may serve as a promising natural alternative to combat bacterial infections, particularly those caused by antibiotic-resistant pathogens. However, further research is needed to standardize extraction techniques, explore the antibacterial mechanisms, and conduct in vivo studies to validate its clinical applications. These findings underscore chitosan's potential as a sustainable and effective solution in addressing the global challenge of bacterial resistance.

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