MASALIQ

Pengaruh Media Pembelajaran Berbasis Artificial Intelligence (AI) Menggunakan Quizizz terhadap Motivasi Belajar Siswa Kelas VII di SMP Negeri 2 Sungai Pua Kabupaten Agam

Nita Fitriani, Zulfani Sesmiarni — Tue, 28 Jul 2026 17:13:17 +0800

The low learning motivation of seventh-grade students at SMP Negeri 2 Sungai Pua, Agam Regency, is associated with instruction that remains dominated by conventional methods, resulting in students being less active and less interested in participating in the learning process. This study aimed to analyze the effect of using artificial intelligence (AI)-based learning media through Quizizz on students’ learning motivation. The study employed a quantitative approach with a quasi-experimental method and a nonequivalent control group design. The study population comprised all 42 seventh-grade students in the 2025/2026 academic year. The sample was selected through purposive sampling, with class VII-1 serving as the experimental group and class VII-2 as the control group, each consisting of 21 students. Data were collected using a Likert-scale learning motivation questionnaire comprising 20 statement items based on Hamzah B. Uno’s six indicators of learning motivation. The data were analyzed using normality tests, homogeneity tests, an independent-samples t-test, a paired-samples t-test, and N-gain analysis. The results showed that the mean learning motivation score in the experimental group increased from 42.76 to 85.33, whereas that in the control group increased from 44.62 to 72.90. The independent-samples t-test showed a significant difference between the two groups (p < 0.05), whereas the paired-samples t-test in the experimental group showed a significant increase (p < 0.001). The N-gain score of the experimental group reached 0.7451, categorized as high, which was greater than the control group’s score of 0.5071, categorized as moderate. Thus, the use of AI-based learning media through Quizizz had a significant effect on increasing students’ learning motivation. These findings reinforce the importance of using technology-based learning media as an alternative for increasing students’ active participation and motivation in the learning process.

Pengaruh Penerapan Strategi Pembelajaran Learning Start with a Question terhadap Hasil Belajar Siswa pada Mata Pembelajaran Informatika di SMAS Pembangunan Bukittinggi

Desriana Desriana, Zulfani Sesmiarni — Tue, 28 Jul 2026 17:23:25 +0800

The low cognitive learning outcomes of tenth-grade students at SMAS Pembangunan Bukittinggi, as indicated by the large number of students who had not yet achieved the Minimum Criteria for Learning Objective Achievement (KKTP), demonstrate the need to implement a learning strategy that promotes students’ active engagement. This study aimed to analyze the effect of implementing the Learning Starts with a Question strategy on students’ learning outcomes in the Informatics and Computer subject. The study employed a quantitative approach using a quasi-experimental method and a nonequivalent control group design. The research sample was selected through purposive sampling and comprised an experimental group and a control group. Data were collected using an objective test administered as a pretest and posttest. The results showed that the mean learning outcome score of the experimental group was 82.24, which was higher than that of the control group at 72.80. The hypothesis test yielded a significance value of 0.033 (p < 0.05); therefore, the null hypothesis was rejected, and the alternative hypothesis was accepted. These findings indicate that implementing the Learning Starts with a Question strategy had a significant effect on improving students’ learning outcomes. Thus, this strategy can be used as an alternative instructional approach that promotes student engagement and improves learning achievement in the Informatics and Computer subject.

Hubungan Penerapan Deep Learning dengan Kemampuan Berpikir Kritis Siswa pada Pembelajaran Informatika di SMPN 9 Pariaman

Selvina Aulia, Zulfani Sesmiarni — Tue, 28 Jul 2026 17:32:44 +0800

The suboptimal critical thinking skills of students in Informatics learning indicate the need to implement a learning approach that promotes active cognitive engagement, one of which is deep learning based on the principles of mindful, meaningful, and joyful learning. This study aimed to analyze the relationship between the implementation of deep learning and students’ critical thinking skills in Informatics learning at SMPN 9 Pariaman. The study employed a quantitative approach with a descriptive correlational design. The study population comprised all eighth-grade students at SMPN 9 Pariaman, with a sample of 53 students. Data were collected using a questionnaire and analyzed through descriptive analysis, normality testing, linearity testing, and the Pearson product-moment correlation test. The results showed that the implementation of deep learning obtained a mean score of 94.75, whereas critical thinking skills obtained a mean score of 100.47. The correlation test yielded a correlation coefficient of 0.848 with a significance value of p < 0.001, indicating a positive, significant, and very strong relationship between the implementation of deep learning and students’ critical thinking skills. These findings confirm that the better the implementation of mindful, meaningful, and joyful principles in Informatics learning, the higher the students’ critical thinking skills. Therefore, deep learning can serve as a foundation for teachers and schools in designing more effective Informatics learning to develop students’ critical thinking skills.

Model Integratif Pembentukan Karakter Peserta Didik melalui Kegiatan Rohani di SMK Negeri Ndora

Albertus Policarpus Dedon — Wed, 29 Jul 2026 09:57:38 +0800

Student character formation requires an approach that not only emphasizes the understanding of values but also integrates spiritual experiences, reflection, and habituation into school life. This study aimed to analyze the contribution of spiritual activities to student character formation at SMK Negeri Ndora and to develop an integrative character formation model based on six spiritual activities. The study employed a descriptive qualitative approach with a case study design. Data were collected through in-depth interviews, observation, and documentation involving a Catholic Religious Education teacher, the vice principal for student affairs, and eleventh-grade students. The data were analyzed using the interactive model of Miles, Huberman, and Saldaña, which comprises data condensation, data display, and conclusion drawing and verification. The results showed that character formation occurred through the integration of six spiritual activities, namely reading Scripture, prayer, Scripture sharing, fasting or matiraga, Eucharistic celebrations, and retreats or recollections. Each activity had a distinct yet complementary pedagogical mechanism. Reading Scripture fostered moral awareness; prayer strengthened discipline, self-regulation, spirituality, and emotional management; Scripture sharing developed empathy and communication skills through reflective dialogue; fasting fostered self-control and social concern; Eucharistic celebrations strengthened the internalization of values through liturgical reflection; while retreats or recollections consolidated spiritual experiences into a moral identity manifested in everyday behavior. This study produced an Integrative Character Formation Model Based on Six Spiritual Activities comprising three stages, namely value internalization, social transformation, and moral identity consolidation. The model contributes theoretically to the development of character education and can serve as an alternative for implementing spirituality-based character education in school settings.

Model Isoterm Adsorpsi Methylene Blue pada Silika Xerogel Termodifikasi EDA/Cu

Edi Nasra, Budhi Oktavia, Riga, M.Iqbal Saputra Gemasih — Wed, 29 Jul 2026 22:25:33 +0800

Methylene blue is a cationic dye that has the potential to contaminate aquatic environments and therefore requires an effective treatment method, one of which is adsorption. This study aimed to analyze the adsorption isotherm characteristics of methylene blue on EDA/Cu-modified silica xerogel and determine the most appropriate isotherm model. The study was conducted experimentally by varying the initial methylene blue concentration from 400 to 1,100 mg/L under optimum adsorption conditions. The adsorption equilibrium data were analyzed using the Langmuir and Freundlich isotherm models through a linear regression approach. The results showed that the Langmuir model exhibited a higher goodness of fit, with an R² value of 0.9967, than the Freundlich model, which obtained an R² value of 0.5763. Analysis using the Langmuir model yielded a maximum adsorption capacity (Qm) of 235.63 mg/g and a Langmuir constant (KL) of 0.201 L/mg, whereas the Freundlich model yielded a Kf constant of 109.3 and an n value of 6.44. These findings indicate that the adsorption of methylene blue on EDA/Cu-modified silica xerogel is better described by the Langmuir isotherm model, indicating the formation of a monolayer on the relatively homogeneous adsorbent surface. This study strengthens the understanding of the equilibrium adsorption mechanism of dyes on modified silica materials and demonstrates the potential of EDA/Cu-modified silica xerogel as an adsorbent for treating dye-containing wastewater.

Ekstraksi dan Karakterisasi Gelatin Kulit Ikan Mahi-Mahi (Coryphaena hippurus) dengan Pretreatment Asam Kandis dan Ultrasonikasi

Fhadillah Putri Soti, Syamsi Aini — Thu, 30 Jul 2026 09:56:00 +0800

The utilization of mahi-mahi (Coryphaena hippurus) skin as a raw material for gelatin is an effort to enhance the value of fishery by-products through an extraction method based on natural materials. This study aimed to determine the characteristics of gelatin from mahi-mahi skin produced through pretreatment using kandis acid and extraction with an ultrasonic bath. Gelatin characterization was conducted based on yield, physicochemical parameters, and functional group identification using Fourier Transform Infrared Spectroscopy (FTIR). The results showed that the resulting gelatin had a yield of 13.60%, moisture content of 6.59%, ash content of 1.02%, fat content of 1.80%, pH of 6.98, viscosity of 2.15 cP, melting point of 21 °C, and gel point of 3 °C. FTIR analysis identified the absorption bands of amides A, I, II, and III at wavenumbers of 3282, 1633, 1528, and 1241 cm⁻¹, respectively. These findings indicate that mahi-mahi skin has the potential to be utilized as an alternative source of gelatin with physicochemical characteristics and functional groups that support the development of materials derived from fishery by-products. The use of kandis acid and ultrasonic extraction also has implications for the development of gelatin production methods that utilize natural materials and are more environmentally friendly.

Identifikasi Keanekaragaman Tumbuhan Paku (Pteridophyta) di Kebun Ratu Kabupaten Jombang

Fitrotul Khasanah, Abdul Hafiedh Arifianto, Ospa Pea Yuanita Meishanti — Thu, 30 Jul 2026 09:57:59 +0800

Fern diversity (Pteridophyta) is an important component in maintaining ecosystem balance, but information regarding its presence and morphological characteristics in Kebun Ratu, Jombang Regency, remains limited. This study aimed to identify fern species in the Kebun Ratu area and describe the morphological characteristics of each species as a basis for providing scientific information to support conservation and the development of learning media based on local potential. The study employed a qualitative approach with an exploratory descriptive design through a field survey. Data were collected through observation, semi-structured interviews, and documentation and were subsequently analyzed using the interactive model of Miles, Huberman, and Saldaña, which comprises data condensation, data display, and conclusion drawing. The results identified three fern species, namely Nephrolepis sp., Adiantum caudatum, and Pteris sp. The three species exhibited differences in morphological characteristics in terms of leaf shape, stem type, and sorus arrangement and were found in moist, shaded habitats near watercourses. These findings indicate that Kebun Ratu has potential as a fern habitat, although the number of identified species was relatively limited. This study contributes local flora inventory data that can be used as a basis for conservation, the preparation of educational herbaria, and the development of environmentally based biology learning media.

Analisis Kebutuhan Pengembangan E-LKM Berbasis Guided Inquiry Learning Terintegrasi Augmented Reality pada Materi Ikatan Kimia

Yulmi Mariani, Alizar — Fri, 31 Jul 2026 08:47:07 +0800

Digital teaching materials have been widely developed for chemistry education, but studies specifically analyzing the need to develop electronic student worksheets (E-LKM) based on Guided Inquiry Learning (GIL) and integrated with Augmented Reality for chemical bonding remain limited. This study aims to analyze the need to develop GIL-based E-LKM integrated with Augmented Reality for Phase F chemical bonding at SMA Negeri 6 Padang. The study employed a quantitative approach with a survey design involving three chemistry teachers and 70 Phase F Grade XI students selected through purposive sampling. Data were collected through structured interviews and a needs analysis questionnaire and were subsequently analyzed using descriptive statistics in the form of percentages. The findings indicate that chemistry instruction remains dominated by lecture methods and the use of conventional teaching materials. A total of 60% of the students experienced difficulty understanding chemistry content, 65% stated that chemical bonding was difficult to understand, 68.6% considered the teaching materials used to be less engaging, 57.1% had never used E-LKM, and 82.9% had never used teaching materials that visualized concepts through images, text, or three-dimensional models. These findings indicate a need to develop GIL-based E-LKM integrated with Augmented Reality to facilitate more active and engaging learning and assist students in visualizing abstract concepts in chemical bonding. This study provides an empirical basis for developing digital teaching materials that address the needs of teachers and students in Phase F chemistry instruction.

Pengembangan E-LKM Berbasis Guided Inquiry Learning Berbantuan Liveworksheets pada Materi Hidrokarbon untuk Fase F SMA

Luthfiyah W.R, Alizar — Fri, 31 Jul 2026 08:56:49 +0800

The National Curriculum encourages the use of digital technology to facilitate active, interactive, and student-centered learning. However, hydrocarbon instruction remains dominated by the use of printed worksheets and therefore does not fully support students’ active engagement. This study aims to develop Guided Inquiry Learning-oriented electronic student worksheets (E-LKM) assisted by Liveworksheets for hydrocarbon topics for Phase F senior high school students and to examine the validity of the resulting product. The study employed the Plomp development model, comprising the preliminary research and prototyping phases. The development process was limited to the third prototype stage, which included self-evaluation, expert review, and one-to-one evaluation. Product validation involved three lecturers from the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, and two chemistry teachers from SMA Negeri 4 Payakumbuh, while the one-to-one evaluation involved three students with different levels of academic ability. Data were collected through interview guidelines, a needs analysis questionnaire, validation sheets, and a student response questionnaire and were subsequently analyzed using Aiken’s V index and descriptive analysis. The findings showed that the E-LKM obtained an average Aiken’s V value of 0.89, which was categorized as valid. The one-to-one evaluation results also showed that the E-LKM was easy to use, had an attractive visual appearance, and received positive responses from students. Thus, the Guided Inquiry Learning-oriented E-LKM assisted by Liveworksheets for hydrocarbon topics met the validity criteria and demonstrated initial practicality, making it suitable for use as an alternative digital learning medium in chemistry instruction.

Rancang Bangun Smart Oven untuk Penguatan Industri Kuliner di Kota Malang

Widiyanti, Riana Nurmalasari, Achmad Romadin — Fri, 31 Jul 2026 09:09:05 +0800

The technological utilization gap continues to limit the efficiency and consistency of baking processes in culinary micro, small, and medium enterprises (MSMEs). This community service program aims to design, implement, and evaluate a smart oven as an appropriate technology for a culinary MSME partner in Malang City, which was purposively selected because it still used a conventional oven. The program implementation included surveys, interviews, problem analysis, training, equipment development, handover, operational assistance, and monitoring. Data were obtained through observation, technical testing, interviews, and documentation and were subsequently analyzed descriptively and comparatively based on temperature stability, baking time, energy consumption, and product success rate. The implementation results showed that the smart oven was able to maintain temperature stability through automatic set-point and time controls, increase baking efficiency by 15–20%, reduce energy consumption by up to 12%, and achieve a product success rate of 98%. These findings indicate that the application of an automatic control system accompanied by operational assistance can improve production process standardization, reduce baking failures, and maintain consistent product quality. This program contributes to providing a replicable model for implementing appropriate technology to strengthen the productivity, efficiency, and competitiveness of local culinary MSMEs.

Rancang Bangun Augmented Reality Book Edukasi ‘Klorofil sebagai Penyebab Warna pada Daun’

Ivani Adellia Talitha, Chintiya Larashati — Sat, 01 Aug 2026 15:32:36 +0800

The limitations of static learning media still make it difficult for elementary school students to understand the concept of chlorophyll and the process of light interaction that causes leaves to appear green. This study aimed to design and develop an educational Augmented Reality Book entitled “Klorofil sebagai Penyebab Warna pada Daun,” which integrates an illustrated book, three-dimensional animation, and a marker-based tracking system. The study employed a research and development approach using the Multimedia Development Life Cycle model, which includes the concept, design, material collecting, assembly, and testing stages. Initial data were obtained through a questionnaire administered to 30 respondents selected using a purposive sampling technique, as well as a literature review. The data were analyzed descriptively through frequencies, percentages, and the categorization of open-ended responses. The results of the study produced an illustrated book consisting of five spreads, low-poly-style three-dimensional models, and an Android-based application developed using Unity and Vuforia. The testing results showed that the augmented reality camera function, marker detection, the appearance of three-dimensional objects, animation, and the exit button operated according to the design. These findings indicate that the integration of print media and augmented reality technology can support the visualization of scientific concepts in a more interactive manner. This study contributes to the development of science learning media that connect printed narratives with digital scientific visualization. Further testing with fifth-grade students is needed to assess the effect of the media on understanding, interest, and learning outcomes.

Perancangan Motion Graphic untuk Media Edukasi Bergaya Infografis sebagai Upaya Peningkatan Kesadaran Lingkungan pada Siswa SDN 52 Parupuk Tabing

Azzahra Putri Adilla, Wiki Lofandri — Sat, 01 Aug 2026 15:48:32 +0800

Although waste problems in the school environment require informative and engaging educational media, the development of infographic-style motion graphics tailored to the characteristics of elementary school students still requires further attention. This study aimed to design an infographic-style motion graphic as an educational medium concerning types of waste, their environmental impacts, and cleanliness-maintaining behaviors for students at SDN 52 Parupuk Tabing. The study employed a research and development approach with a design thinking framework comprising the empathize, define, ideate, prototype, and test stages. The participants consisted of 15–20 students from Grades II, IV, and V selected through convenience sampling, one teacher, and a media expert. Data were collected through observation, interviews, documentation, a literature review, and questionnaires, and were subsequently analyzed descriptively. The study produced a motion graphic entitled Jaga Lingkungan Yuk dari Sampah, with a duration of 3 minutes and 53 seconds, consisting of six scenes, presented in MP4 format and Full HD resolution, and integrating flat illustrations, two-dimensional animation, typography, narration, music, and sound effects. The expert evaluation indicated the need for revisions to the animation timing and transitions. These findings indicate that motion graphics can be developed as a communicative, engaging, and contextual supplementary medium for environmental education among elementary school students.

Rancang Bangun Augmented Reality Book Edukasi “Apa yang Tidak Bisa Kulihat”

Ranti Rahmadhani, Chintiya Larashati — Sat, 01 Aug 2026 16:09:58 +0800

Although the use of augmented reality in early childhood education continues to develop, media that specifically visualize invisible phenomena through the integration of physical books, three-dimensional objects, animation, audio, and interaction remain limited. This study aimed to design and develop the educational Augmented Reality Book Apa yang Tidak Bisa Kulihat for children aged 3–6 years. The study employed a research and development approach with the stages of research, design, and development. A total of 25 respondents were selected using a purposive sampling technique. Data were collected through observation, Likert-scale questionnaires, open-ended questions, short interviews, and a literature review, and were then analyzed using descriptive quantitative and qualitative methods. The results of the study produced an interactive illustrated book with five features, namely AR Cover, AR Wind, AR Smell, AR Bacteria, and AR Sound. Alpha testing showed that six components, including navigation, functioned according to the design with a 100% success rate. The product was able to display three-dimensional objects, animation, audio, and interactive responses after the image target was recognized. These findings enrich the development of augmented reality-based early science learning media and demonstrate the potential of integrating physical books and digital technology as an interactive educational medium. Further testing involving children, parents, and teachers is needed to assess the learning effectiveness and ease of use of the product.

A Comparative Study of Energy Loss in Ogee-Crested and Round-Crested Weirs through Laboratory Testing

Rahmadani Ari Saputra, Totoh Andayono — Sat, 01 Aug 2026 16:22:05 +0800

Crest geometry is a critical determinant of energy transformation in open-channel flow; however, direct laboratory comparisons between ogee-crested and round-crested weirs remain limited. This study aimed to analyze and compare energy loss across both weir types under equivalent experimental conditions. A quantitative laboratory-experimental design was employed using an open-channel flume at the Hydraulics Laboratory, Department of Civil Engineering, Universitas Negeri Padang. Each weir model was tested in three trials, with channel-bed elevation, flow depth, and flow velocity measured at the upstream, crest, and downstream sections. Total energy loss was calculated using Bernoulli’s equation, while frictional loss was estimated using the Darcy–Weisbach equation. The ogee-crested weir produced a mean total energy loss of 14.63 cm, whereas the round-crested weir produced 13.74 cm, yielding a difference of 0.89 cm. Frictional losses were 0.86 cm for the ogee-crested weir and 1.18 cm for the round-crested weir. Reynolds numbers of 33,408 and 40,880, respectively, indicated turbulent flow in both models. These findings demonstrate that total energy loss was governed not only by frictional resistance but also by turbulence and crest geometry. Under the tested conditions, the round-crested weir retained flow energy more effectively than the ogee-crested weir. This study contributes empirical evidence on the hydraulic performance of different crest geometries and provides practical insight for selecting weir configurations in open-channel flow applications.

Penjernihan Minyak Jelantah Menggunakan Campuran Karbon Batang Kentang (Solanum tuberosum L.) dan Bleaching Earth

Dini Hayati Nufuz, Umar Kalmar Nizar — Sun, 02 Aug 2026 13:21:00 +0800

Used cooking oil is cooking oil that has undergone degradation due to repeated use at high temperatures, thereby producing oxidation, hydrolysis, and polymerization compounds that reduce oil quality and potentially endanger health and the environment. This study aimed to evaluate the effects of variations in the composition of potato stem carbon (Solanum tuberosum L.) and bleaching earth on the quality of used cooking oil and to determine the most effective adsorbent composition. Potato stem carbon was characterized through proximate analysis and then combined with bleaching earth at mass ratios of 75:25, 50:50, and 25:75 to purify used cooking oil. The quality of the purified oil was evaluated based on density, flow rate, acid value, and saponification value. The proximate analysis results showed that potato stem carbon had a moisture content of 10.05%, an ash content of 9.50%, a volatile matter content of 2.40%, and a fixed carbon content of 88.10%. Variations in adsorbent composition affected the physicochemical properties of used cooking oil, with the 50:50 composition demonstrating the best performance based on the lowest density of 0.9353 g/mL, the highest flow rate of 0.3080 mL/s, the lowest acid value of 4.8378 mg KOH/g, and the highest saponification value of 66.1884 mg KOH/g. These findings confirm that the combination of potato stem carbon and bleaching earth at a mass ratio of 1:1 produced the most effective synergistic effect in improving the quality of used cooking oil through the adsorption process and has the potential to be used as an alternative adsorbent for used cooking oil purification.

Penjernihan Minyak Jelantah Menggunakan Bleaching Earth dengan Variasi Massa Karbon Tangkai Nipah

Mila Hasna Zalfa, Umar Kalmar Nizar — Sun, 02 Aug 2026 13:32:17 +0800

Used cooking oil is waste generated from repeated frying that undergoes quality deterioration due to oxidation, hydrolysis, and polymerization reactions, thereby potentially causing adverse effects on health and the environment. One method that can be used to improve the quality of used cooking oil is adsorption using a combination of biomass-derived carbon and bleaching earth. This study aimed to analyze the effect of variations in the mass of nipa palm stalk carbon (Nypa fruticans) combined with bleaching earth on the characteristics of used cooking oil after the purification process. Nipa palm stalk carbon was obtained through carbonization at 300 °C for 1 hour. The purification process was conducted on 100 mL of used cooking oil using carbon mass variations of 1, 3, and 5 g, with a constant bleaching earth mass of 0.5 g. The characteristics of the purified oil were evaluated based on density, flow rate, acid value, and saponification value, whereas the carbon characteristics were analyzed through proximate testing. The proximate analysis results showed that nipa palm stalk carbon had a moisture content of 0.0148%, an ash content of 5.27%, a volatile matter content of 2.5670%, and a fixed carbon content of 92.15%. Increasing the carbon mass from 1 to 5 g reduced the oil density from 0.9326 to 0.9085 g/mL and the acid value from 49.112 to 12.256 mg KOH/g, while increasing the flow rate from 0.795 to 2.18 mL/s and the saponification value from 95.161 to 165.180 mg KOH/g. The best treatment was obtained using a combination of 5 g of nipa palm stalk carbon and 0.5 g of bleaching earth. These findings indicate that increasing the mass of nipa palm stalk carbon in the adsorbent combination improved the physicochemical characteristics of used cooking oil. The combination of nipa palm stalk carbon and bleaching earth has the potential to be developed as a simple, economical, and environmentally friendly biomass-based adsorbent for used cooking oil purification.

Penggunaan Karbon Daun Aren dan Bleaching Earth dalam Penjernihan Bertahap Minyak Jelantah

Aura Dwi Qalbi, Umar Kalmar Nizar — Sun, 02 Aug 2026 13:42:00 +0800

Repeated use of cooking oil causes a decline in oil quality due to the formation of free fatty acids, polar compounds, and oxidation products. This study aimed to evaluate the effect of variations in the composition of sugar palm leaf carbon (Arenga pinnata) and bleaching earth on the quality of used cooking oil through an adsorption-based purification process. Sugar palm leaf carbon was obtained through carbonization at 300 °C for 1 hour and was then characterized using proximate analysis. The purification process was conducted using three adsorbent compositions, namely K75-B25, K50-B50, and K25-B75. Adsorption effectiveness was evaluated based on density, flow rate, acid value, and saponification value. The proximate analysis results showed that sugar palm leaf carbon had a moisture content of 4.49%, a volatile matter content of 2.20%, an ash content of 9.00%, and a fixed carbon content of 88.8%. All treatment variations improved the quality of used cooking oil compared with the untreated sample. The K75-B25 treatment demonstrated the best performance, with the lowest density of 0.9407 g/mL, the highest flow rate of 0.3227 mL/s, the lowest acid value of 4.8378 mg KOH/g, and the highest saponification value of 50.9149 mg KOH/g. These findings indicate that increasing the proportion of sugar palm leaf carbon resulted in greater adsorption effectiveness than increasing the proportion of bleaching earth. Thus, sugar palm leaf carbon combined with bleaching earth has the potential to be used as an alternative adsorbent to improve the physicochemical characteristics of used cooking oil through a purification process.

Efektivitas Campuran Karbon Kulit Umbi Talas (Colocasia esculenta) dan Bleaching Earth untuk Penjernihan Minyak Jelantah

Popy Meylani, Umar Kalmar Nizar — Sun, 02 Aug 2026 13:55:38 +0800

Purification of used cooking oil is necessary to reduce the content of impurity compounds formed during repeated use so that the physicochemical quality of the oil can be improved. This study aimed to evaluate the effectiveness of a mixture of taro corm peel carbon (Colocasia esculenta) and bleaching earth as an adsorbent in the purification of used cooking oil. The carbon was prepared by carbonizing taro corm peel at 250 °C for 1 hour and was then combined with bleaching earth in five adsorbent compositions, namely K100, K75BE25, K50BE50, K25BE75, and BE100. The adsorption process was conducted using 5 g of adsorbent in 100 mL of used cooking oil with stirring at 200 rpm for 60 minutes at room temperature. The carbon characteristics were analyzed based on moisture content, ash content, and fixed carbon content, whereas the quality of the purified oil was evaluated based on acid value, saponification value, density, and flow rate. The characterization results showed that taro corm peel carbon had a moisture content of 2.93%, an ash content of 8.49%, and a fixed carbon content of 88.58%. Variations in adsorbent composition affected the quality of used cooking oil after purification, with the K50BE50 treatment demonstrating the best performance based on the lowest acid value and better saponification value, density, and flow rate than the other treatments. These findings indicate that a balanced composition of taro corm peel carbon and bleaching earth produced the most effective adsorption process. The combination of these two adsorbents has the potential to be developed as an effective, economical, and environmentally friendly biomass-based alternative adsorbent for improving the quality of used cooking oil.

The Use of HelloTalk for Seventh Graders' Vocabulary Mastery at SMPN 1 Prambon

Mon, 03 Aug 2026 17:27:00 +0800

Vocabulary mastery is fundamental to English language learning because it supports effective communication across listening, speaking, reading, and writing; however, many junior high school students experience difficulties acquiring vocabulary because of limited exposure to authentic language use and the continued predominance of conventional instructional practices. This study aimed to examine the effect of the HelloTalk application on students’ vocabulary mastery and explore students’ and their teacher’s perceptions of its implementation in English language learning. A mixed-methods approach with a convergent parallel design was employed, involving 32 seventh-grade students and one English teacher at SMPN 1 Prambon. Quantitative data were collected through vocabulary pretests and posttests and analysed using descriptive and inferential statistics, whereas qualitative data were obtained through questionnaires, interviews, and classroom observations and analysed through data reduction, data display, conclusion drawing, and verification. The findings showed that the students’ mean vocabulary score increased from 78.8 on the pretest to 92.3 on the posttest, demonstrating improved vocabulary mastery following the implementation of HelloTalk. The qualitative findings further revealed positive perceptions among the students and teacher, particularly regarding the application’s interactive features, ease of use, opportunities for authentic communication, and contribution to students’ motivation and confidence in learning English. The study concludes that HelloTalk can serve as an effective mobile-assisted language learning application for enhancing vocabulary mastery and facilitating more interactive, authentic, and learner-centred English instruction. These findings contribute empirical evidence regarding the pedagogical value of mobile-assisted language learning and provide practical implications for English teachers seeking to integrate communication-based digital applications into vocabulary instruction.

Strategi Konservasi dan Pengelolaan Rusa Timor (Rusa timorensis) dengan Model Integrated Adaptive Conservation Management (IACM) di Pulau Lombok

Abdul Kadir Alaydrus, Pahmi Husain — Tue, 04 Aug 2026 00:00:00 +0800

The Timor deer (Rusa timorensis) is a herbivorous mammal that plays an important role in maintaining the balance of dry tropical forest ecosystems in Indonesia. However, its population on Lombok Island continues to face pressure from deforestation, habitat fragmentation and degradation, illegal hunting, and increasing human–wildlife conflict. Although various studies have addressed Timor deer conservation, the available research remains partial and has not produced a comprehensive synthesis as a basis for adaptive management. This study aims to synthesize developments in research on the conservation and management of Timor deer on Lombok Island through a scoping review approach. The review was conducted based on the PRISMA-ScR guidelines by searching the Scopus, Web of Science, ScienceDirect, SpringerLink, Google Scholar, Garuda, and Neliti databases. Of the 285 articles identified, 38 publications met the inclusion criteria and were analyzed qualitatively and descriptively using thematic analysis. The synthesis results show that research on Timor deer remains dominated by studies of habitat distribution, population dynamics, and in situ conservation, whereas collaborative governance, conservation policies, and community participation have received limited attention. The main threats to the sustainability of Timor deer populations include land-use conversion, habitat fragmentation, illegal hunting, declining forage quality, and weak management of conservation areas. Based on these findings, this study proposes the Integrated Adaptive Conservation Management (IACM) model, which integrates in situ and ex situ conservation, collaborative governance, and the use of conservation technology as an adaptive management strategy. This model provides a conceptual contribution to the development of wildlife management and may serve as a scientific basis for formulating evidence-based conservation policies to support the sustainability of Timor deer populations and biodiversity management on Lombok Island.

Studi In Silico Senyawa Bioaktif Ekstrak Curcuma longa sebagai Inhibitor Protein LASR pada Bakteri Pseudomonas aeruginosa

Nur Adillah, Ahadul Putra — Wed, 05 Aug 2026 19:38:31 +0800

Pseudomonas aeruginosa is an opportunistic pathogenic bacterium that employs a quorum-sensing mechanism mediated by the LasR protein to regulate biofilm formation and virulence. This study aims to analyze the potential of bioactive compounds from Curcuma longa as inhibitors of the LasR protein through an in silico approach. The study employed a computational approach using molecular docking to predict interactions between the ligands and the LasR protein. The analysis was followed by the prediction of physicochemical properties based on Lipinski’s Rule of Five and the evaluation of pharmacokinetic and toxicity profiles using ADMET parameters. The molecular docking results showed that all compounds had negative docking scores ranging from −6.9297 to −9.5288 kcal/mol. Curcumin and demethoxycurcumin exhibited the strongest binding affinities, with docking scores of −9.5288 and −9.5189 kcal/mol, respectively. All compounds met the criteria of Lipinski’s Rule of Five and demonstrated reasonably favorable ADMET profiles, although a moderate potential for toxicity was identified based on the AMES mutagenicity and human hepatotoxicity parameters. This study concludes that the bioactive compounds of Curcuma longa, particularly curcumin and demethoxycurcumin, have the potential to be developed as candidate inhibitors of the LasR protein. These findings provide a computational basis for compound structure optimization and further research through in vitro and in vivo testing to validate their effectiveness and safety as LasR inhibitors.