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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
 72   73   74   75   76 
Optimum Condition of Ni2+ Cation Desorption from Adsorbent Sulfonate-modified Silica gel-GPTMS Kauri, Desrike; Oktavia, Budhi; Sari, Trisna Kumala; Khair, Miftahul
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7448

Abstract

Silica gel is a compound that has two active sides, namely silanol (S-OH) and siloxane (Si-O-Si), which are still less effective as adsorbents, so modification is carried out. Silica is modified by adding sulfonate compounds with the help of GPTMS bridging compounds. This modification aims to improve the absorption capacity of Nickel (Ni2+) metal ions in the modified adsorbent, namely sulfonate-modified silica gel-GPTMS. The characterizations used are SSA (Atomic Absorption Spectrophotometry) to see the success of the adsorption and desorption process. This research is quantitative experimental research where the adsorption and desorption processes are carried out using the column method, where the adsorption process itself is carried out on the Ni2+ cation using silica gel-GPTMS Sulfonate adsorbent at an optimal concentration of 20 ppm and pH 3. Then, we continued with the desorption process, which aims to determine the optimum conditions of the desorption process, including determining the type of desorption agent (NaCl and CaCl2) and concentration for the Ni2+ cation desorption process. Based on the results of the research conducted, the optimum condition of the type of desorption agent is CaCl2 where the desorbed weight is 0.1527 mg, and the per cent desorption is 90.10%, the optimum concentration of CaCl2 is 0.025M with a desorbed weight of 0.1442 mg and a per cent desorption of 90.18%. Based on the experimental results, the sulfonate-modified silica gel-GPTMS adsorbent can still be used repeatedly for adsorption and desorption of Ni2+ cations at optimum conditions.
Optimation of Adsorpsi and Desorpsi of Mn2+ Ions on Gel-GPTMS Silica (Glycidoxypropyltrimethoxysilane) Modified with Sulfonates Azizah, Ayu; Oktavia, Budhi; Dewata, Indang; Away, Romy Dwipa Yamesa
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7449

Abstract

Silica gel is an adsorbent often used in chromatography columns as a resin or stationary phase. Silica gel has active groups on its surface in the form of silanol (-SiOH) and siloxane (-Si-O-Si-). The effectiveness of silica gel in absorbing heavy metal ions is very low, so modification is needed to increase the absorption capacity of silica gel to metal ions. The addition of sulfonate with the GPTMS linkage compound dose modification. Adsorption and desorption are two methods that can be used to separate manganese metal. This research aims to obtain the optimum desorption agent (NaCl and CaCl2) and the concentration of the AAS-characterised desorption agent. This study used the column method for the adsorption and desorption process. This study used the column method for the adsorption and desorption process. The column method is a technique used to separate certain substances from a mixture by utilizing the interaction between adsorbent and adsorbate. The results obtained optimum desorption agent CaCl2 where the weight desorbed 0.1168002 mg with a percent desorption of 92.3%, the optimum concentration of CaCl2 0.05 M where the weight desorbed 0.132264 mg with a percent desorption of 95% Adsorbent characterization was conducted with FTIR and XRF.
Optimation of Fe3+ Ion Desorption Using Sulfonate Modified Silica Gel-GPTMS Elvina, Elvina; Oktavia, Budhi; Nasra, Edi; Zainul, Rahadian
Jurnal Pijar Mipa Vol. 19 No. 5 (2024): September 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.v19i5.7453

Abstract

Silica gel is one of the adsorbents widely used in adsorption, but silica gel has a low ability to absorb metals. Hence, modifications need to be made to improve it. Silica gel modified using sulfonate groups from monosodium salt compound of 4-amino-5-hydroxy-2,7-naphthalene disulfonic acid using GPTMS coupling compound for adsorption and desorption of Fe3+ ions by column method was carried out. The adsorption process of Fe3+ ions using silica gel-GPTMS-sulfonate has been carried out in previous studies and obtained an optimum state at pH 6 and a concentration of 20 ppm. After the adsorption process is carried out, the desorption process is continued with variations in the type of desorption eluent and concentration variations. The types of desorption agents are NaCl, CaCl2, HCl, and HNO3, with the optimum desorption agent being HNO3 with a release of 0.077517 mg of Fe3+ ions from 0.1587403 mg of Fe3+ ions absorbed and a desorption percentage of 48.83%. The concentration variations are 0.5 M, 1 M, 2.5 M, and 5 M, with an optimum concentration of 2.5 M HNO3 with a release of 0.098505 mg Fe3+ ions and a desorption percentage of 64.43%.
Determination of Optimum Temperature for Amount Lactic Acid Bacteria and Antioxidant Activity from Pickled Bamboo Betung Boobs (Dendrocalamus asper) Pasaribu, Nurul Alda; Manalu, Kartika; Nasution, Rizki Amelia
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.v19i6.7475

Abstract

Pickled betung bamboo shoots (Dendrocalamus asper) are a traditionally fermented product and can potentially be a source of probiotics. Pickled bamboo shoots contain good microorganisms, namely LAB, which are bacteria that contribute to the food sector for natural fermentation. Fermentation of bamboo shoots produces antioxidant compounds at an optimum temperature range. The research aims to understand the optimum temperature for the amount of LAB and antioxidant activity in pickled betung bamboo shoots. This research is a laboratory experiment with 3 treatments, namely 100 grams of bamboo shoots fermented with pickled bamboo shoots at a temperature of 15℃ (K1), a temperature of 37℃ (K2), and a temperature of 40℃ (K3). The three treatments were incubated for 72 hours with 4 repetitions. The research stages included processing pickled bamboo shoots, isolating bacteria using the dilution series-pour plate method, and antioxidant testing using the DPPH method. The number of LAB is calculated using the Quebec Colony Counter. Data analysis used Anova and Duncan's test. The results obtained include that temperature influences the amount of BAL in pickled bamboo shoots with a value of p=0.016. The number of LAB at a temperature of 150C was 59.50, at a temperature of 37 129.74, and a temperature of 40 107.57. Temperature also affects antioxidant activity. The average values at temperatures of 15.37, 40℃ are 30.60%, 25.241%, and 16.8782% (% inhibition), 36.3655, 41.6775, 51.0757 (IC50). The optimum temperature for the number of BAL pickled bamboo shoots is 37°C, and the optimum temperature for the number of antioxidants is 15°C.
Stochastic Modeling with Poisson Hidden Markov in Hepatitis B Cases Fairuz, Ersya Nurul; Widyasari, Rina; Aprilia, Rima
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.v19i6.7510

Abstract

Hepatitis B is transmitted through blood or body fluids contaminated with the virus from Hepatitis B sufferers (carriers). The factors that cause a person to contract Hepatitis B are sexual intercourse, blood contact, placental contact from the mother to the baby, and saliva. The incubation period for Hepatitis B Virus (HBV) ranges from 30 - 180 days with an average of 60 - 90 days. HBV can be detected 30 - 60 days after infection and persists for a certain period. Thus, the behaviour of infectious diseases can be observed and described using mathematical modelling. Mathematical modelling is a field of mathematics that represents and explains physical systems or problems that occur in the real world and are solved in mathematical statements. The mathematical model used to overcome uncertainty in variable values ​​is a stochastic model. These causal factors are not directly observed and form a Markov chain. The model that can be used for the uncertainty of an event is the Hidden Markov Model. The Hidden Markov Model (MHM) is a type of stochastic modelling that does not recognize the factors that trigger the problem being modelled. The Poisson Hidden Markov model is used to model Hepatitis B disease. Hepatitis B disease data is a series of observations that experience overdispersion and depend on the trigger of Hepatitis B disease, which is assumed not to be observed directly and forms a Markov chain. The aim to be achieved in this research is to model Hepatitis B disease at the Medan Haji Hospital using the Poisson Hidden Markov model and to find parameter estimates using the Expectation Maximization Algorithm. This type of research uses quantitative research methods. The conclusions that can be drawn based on the results and previous discussions are as follows: the method for determining the average number of patients in patient B can use the PHMM (Poisson Hidden Markov Model) method with the EiM (Expectation-Maximization Algorithm) algorithm, the best model for the number of Hepatitis B patients in Haji Hospital at this hospital is the model with three hidden cases with the parameter estimation value. The average number of Hepatitis B patients is 0.0324 in 1 month, and the average predicted results obtained by the hidden condition model 3 align with the original conditions in the previous months.
Identification of the Implementation of Environmental Sanitation in Settlements in Mataram District, West Nusa Tenggara Ernawati, Ernawati; Rahayu, Rachmawati Noviana; Supardiono, Supardiono; Isrowati, Isrowati; Akbar, Cahyo Aditya; Saputra, Kurniawan Adi; Wahyuni, Elisa Darmasari; Putra, Hengki Adriyan; Hidayati, Cita Rizqi
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.v19i6.7574

Abstract

Sanitation is an important health initiative that protects the cleanliness of the environment and its users. Basic sanitary facilities include clean water, wastewater treatment, drainage channels, and waste management. This research aims to provide an overview and information regarding the availability of basic sanitation facilities in a settlement. The research was conducted in Mataram District, West Nusa Tenggara. The research method used in this research is a descriptive qualitative method. The research focuses on identifying fundamental sanitation aspects, which include design and construction, waste management, wastewater management, and drainage systems. Direct observation, structured interviews, and in-depth interviews gathered data. According to the research findings, Mataram District's clean water supply comes from PDAM and drilled wells; waste management is not optimal because waste sorting and processing are not yet available, wastewater treatment is still done on-site in septic tanks in each house, and some wastewater comes from washing activities. While bathing drains into the gutter, the residents' yards have a gutter-based drainage system. The participation of all stakeholders, including the local administration and the local community, is necessary to optimize the sanitation system in Mataram District. The implementation of regulations and the provision of infrastructure are essential for the support of drainage and waste management systems. To preserve the cleanliness of wastewater channels, the community can take an active role in processing refuse, beginning at the household level and cleaning the gutters.
Analysis of Learning Style Profiles to Optimize Student Achievement Septiani, Devi; Lestari, Titi; Azizah, Dinar Martia
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.v19i6.7613

Abstract

Student achievement is an indicator of learning success that indicates the extent to which a student has acquired the skills and knowledge set forth by their educational program. Understanding students' learning styles plays a significant role in determining learning success. One of the efforts to optimize student achievement is facilitating learning activities that align with students' learning styles. Students are no longer preoccupied with understanding their learning styles but are focused on deepening the material. This study aims to describe the learning style profiles of students, and students and lecturers in the learning process can follow up on the results. This study uses a survey research method with a questionnaire instrument containing 54 statements. A learning styles questionnaire prepared based on the opinion of De Poter & Hernacki is used as a data collection tool. Learning styles are identified as visual learning style, auditorial learning style, and kinesthetic learning style. The questionnaire was distributed to students in semesters 2, 4, 6, and 8, totaling 51 students. The data analysis technique used is a descriptive analysis of the questionnaire results. The questionnaire results show that 36% of students have visual and kinesthetic learning styles, 14% have auditory, and 14% are inconsistent. This inconsistency may suggest a balanced learning style, where students do not rely heavily on one learning mode but rather integrate multiple styles depending on the context. Therefore, the Science Education Study Program lecturers should implement a learning model that can facilitate visual and kinesthetic styles, even though the subjects taught are theoretical. Incorporating a variety of teaching methods, such as visual aids, hands-on activities, and auditory discussions, can accommodate the diverse learning preferences of students, leading to a more inclusive and effective learning environment.
Potential of Bintangur (Calophyllum spp.) Diversity in West Kalimantan as a Biology Learning Resource in Senior High School Faturrahman, Mas Akhbar; Ningsih, Kurnia; Sandra, Klaudia Mareta; Astuti, Widya; Isyatirradhiyah, Isyatirradhiyah; Ayu, Nambisas Arum Kusuma; Salsabila, Nur; Afifah, Artha Bayu; Perdana, Aurendyo Yuscel
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.v19i6.7642

Abstract

Indonesia is one of the countries with a very high level of biodiversity. West Kalimantan is one of the provinces with the highest level of biodiversity in Indonesia. One form of biodiversity found in West Kalimantan's forests is bintangur (Calophyllum spp.). The very high diversity of bintangur species is fascinating to be utilized as a source of learning biology, especially in the material of biodiversity and their interactions and roles. This study aimed to analyze the potential of bintangur diversity in West Kalimantan as a biology learning resource on the material of biodiversity and their interactions and roles in senior high school. This research uses the qualitative method. This research consists of two stages. The first stage is a literature review to find information related to bintangur species in West Kalimantan. In contrast, the second stage is an analysis of learning resource requirements based on the results of the literature review that has been carried out. The results of the literature review stage show that there are 27 species of bintangur in West Kalimantan, as well as their classification, main characteristics, habitats, and values to the environment and other organisms. The literature review stage results are then continued to the learning resources analysis. Six requirements must be met for learning resources: clarity of the potential availability of objects and problems raised, suitability for learning objectives, clarity of targets and their designation, clarity of information disclosed, clarity of exploration guidelines, and clarity of the results to be achieved. The analysis of learning resource requirements that have been carried out shows that the diversity of bintangur species in West Kalimantan meets the requirements of learning resources so that it can be utilized as a biology learning resource on the material of biodiversity and their interactions and roles in senior high school.
Analysis of Students Creative Thinking Abilities on the Topic of Energy in Living Systems Hulinggato, Asrawati; Pikoli, Masrid; Uloli, Ritin
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.v19i6.7649

Abstract

Creative thinking is a habit of sharp thinking with intuition, moving the imagination, revealing new possibilities, uncovering unique ideas, and inspiring unexpected ideas. Based on fluency, flexibility, and originality, this research aims to describe students' creative thinking abilities regarding energy material in class VII life systems at SMP Negeri 1 Tapa. This research type is descriptive qualitative research. The instrument used is a 10-number essay test whose validity has been tested. The sample used in this research was 30 students. The results of research on creative thinking abilities on energy materials in living systems are in the fluency aspect of 55.83% in the enough creative category, the flexibility aspect of 67.5% in the creative category, and the originality aspect of 52.5% in the enough creative category. This shows that the low ability to think creatively is due to students' need to understand the creative thinking ability test and students' unfamiliarity with creative thinking. Students are expected to be able to practice working on questions that can hone creative thinking skills and can use the results of this research as a reference for further research related to creative thinking skills.
Analysis of Earthworm (Lumbricus rubellus) Growth Due to the Addition of Fruit Waste Pulp to Feed Raksun, Ahmad; Merta, I Wayan; Mertha, I Gde
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.v19i6.7670

Abstract

Earthworms are a group of animals that live in soil and have a segmented body, bilaterally symmetrical, and covered by a transparent cuticle, which protects from physical and chemical disturbances. One of the factors that influences the growth of earthworms is the availability of food substances in the media where they live. Research on the analysis of the increase in the number and total weight of earthworms (Lumbricus rubellus) due to the provision of fruit waste in feed has been carried out in 2023. This research aims to analyse the increase in the number and total weight of earthworms due to the application of fruit waste to the media where earthworms live. Research data was analysed using variance analysis. In this study, the results were obtained: (1) fruit waste pulp (papaya and banana) added to feed had a significant effect on increasing the number of earthworms, (2) fruit waste pulp added to the feed can increase the total weight of earthworms, (3) Giving 2 liters of fruit waste to the feed results in a higher number and total weight of earthworms than other levels of fruit waste pulp.

Page 74 of 118 | Total Record : 1179

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