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All Journal IAES International Journal of Robotics and Automation (IJRA) Jurnal Neutrino : jurnal fisika dan aplikasinya Jurnal Tadris Kimiya JIPF (Jurnal Ilmu Pendidikan Fisika) Momentum: Physics Education Journal PENDIPA Journal of Science Education BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Jurnal Pendidikan Multikultural Indonesia Hydrogen: Jurnal Kependidikan Kimia International Journal of Research in Education (IJRE) Aktual : Jurnal Pengabdian Kepada Masyarakat
M. Lutfi Firdaus, M. Lutfi
University of Bengkulu
Religion Humanities Automotive Engineering Chemistry Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Physics Public Health Social Sciences Other

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Penerapan PhET Interactive Simulations untuk Meningkatkan Motivasi Belajar Mahasiswa Rozi, Zico Fakhrur; Firdaus, M. Lutfi; Suswati, Endang
BIOEDUSAINS:Jurnal Pendidikan Biologi dan Sains Vol 7 No 2 (2024): Bioedusains: Jurnal Pendidikan Biologi dan Sains
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/bioedusains.v7i2.14159

Abstract

This study aims to determine students' responses after implementing biology learning on the pH scale material using the Physics Education Technology (PhET) Simulation. The method used was a survey by distributing questionnaires to 15 Biology Education students at Universitas PGRI Silampari, Lubuklinggau City, South Sumatra Province, who had studied pH scale measurement material using the PhET Simulation. The questionnaire included several indicators: students' interest, benefits, display, and usability of PhET, divided into six statements. The results showed that 86.7% of students strongly agreed that learning using PhET was very interesting, 53.3% of students strongly agreed that PhET motivated and facilitated learning the pH scale, 60% of students strongly agreed that PhET made it easier to understand the pH scale material, and 53.3% of students strongly agreed that the PhET Simulation was easy to understand and its animation design and text met students' needs. In conclusion, the PhET Simulation is very engaging, motivates learning, facilitates material learning, eases material understanding, is easy to use, and its animation design and text align with students' needs. Keywords: PhET, Potential of Hydrogen, Student Response.
Uji Aktivitas Antioksidan menggunakan Metode DPPH (2,2-Difenil-1-Pikrilhidrazil) Terhadap Ekstrak Daun Kunyit (Curcuma domestica) Hadirama, Khanna; Wardana, Rendy Wikrama; Nursa’adah, Euis Wikrama; Ruyani, Aceng Wikrama; Firdaus, M. Lutfi
BIOEDUSAINS:Jurnal Pendidikan Biologi dan Sains Vol 7 No 2 (2024): Bioedusains: Jurnal Pendidikan Biologi dan Sains
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/bioedusains.v7i2.11507

Abstract

This study aimed to identify the antioxidant content in turmeric leaf extract using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. The tested concentrations include 200 ppm, 150 ppm, 100 ppm, 50 ppm, 25 ppm, and 12.5 ppm, with absorbance measurements conducted using a UV-Vis Spectrophotometer. Data were analyzed by calculating the percentage of antioxidant activity based on the absorbance values of each concentration. Subsequently, the IC50 value was determined using a nonlinear regression equation, representing the relationship between the logarithm of concentration and the percentage of antioxidant activity (inhibition). The results of the study showed that the IC50 value of turmeric leaf extract was 61.88. The conclusion of this study indicates that turmeric leaf extract exhibits strong antioxidant activity. Keywords: Antioxidant, Turmeric Leaves, DPPH, IC50
ENVIRONMENTALLY FRIENDLY BRIQUETTES MADE FROM A MIXTURE OF SNAKE FRUIT SKIN AND GOAT MANURE Rotami, Ladya; Wardana, Rendy Wikrama; Setiawan, Iwan; Anjarsari, Putri; Firdaus, M. Lutfi
Jurnal Neutrino:Jurnal Fisika dan Aplikasinya Vol 18, No 1 (2025): October
Publisher : Universitas Islam Negeri Maulana Malik Ibrahim Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18860/neu.v18i1.32592

Abstract

The purpose of this study is to make snake fruit briquette charcoal mixed with goat dung an alternative energy source that supports environmentally friendly technology. The samples used were snake fruit and goat dung as charcoal and tapioca flour as an adhesive. Each sample has 200 grams of charcoal and 30 grams of adhesive. The percentage of charcoal is 50% snake fruit bark charcoal and 50% goat dung charcoal. Snake fruit briquettes and goat dung are divided into 3 groups: A1 (87% charcoal: 13% adhesive), A2 (77% charcoal: 23% adhesive), and A3 (97% charcoal: 3% adhesive). In 3 samples tested with the percentage of charcoal flour to tapioca flour, the first one was produced in sample A1 (87%: 13%), which produced a moisture content of 9.87%, an ash content of 36.75%, and a calorific content of 5899 kcal/kg. The A2 sample (77%:23%) yielded a moisture content of 11.44%, an ash content of 32.13%, and a calorific content of 5634 kcal/kg. The A3 sample yielded a moisture content of 8.93%, an ash content of 41.38%, and a calorific content of 6339 kcal/kg.  This study concludes that the best calorific value in the A3 sample is 97% charcoal briquettes with 3% adhesive, with a calorific value of 6339 cal/kg.
Ethnoscience-Based Module: Biodiversity Materials in Lembak Tribe Walid, Ahmad; Winarni, Endang Widi; Yanti, Fitri April; Firdaus, M. Lutfi; Suherman, Suherman; Zulkarnain, Zulkarnain
Jurnal Tadris Kimiya Vol 7 No 2 (2022)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v7i2.19955

Abstract

Efforts to conserve plants and documentation of related local knowledge in the Dendam Tak Sudah Lake, Dusun Besar Village, Bengkulu City area are important to carry out and introduce to students. The study aims to synthesize the biodiversity material modules developed to identify the types of medicinal plants found in Dusun Besar Village. Thiagarajan's development model section is define, design, develop, and disseminate. Identification, synthesis, feasibility, response, and analysis data were obtained as research data. The module was piloted in five elementary schools in Bengkulu City. The study found 20 types of medicinal plants, including the most commonly used hereditary species in the Lembak community. The validation results show that the criteria are very valid, with an expert validator value of 85%. The module also received an excellent response rate of 82%. Therefore, the biodiversity material modules are very attractive, feasible, and effective for learning biodiversity materials in elementary schools.
Robotics Workshop to Increase Motivation and Science Literacy of SMP IT Khairu Ummah Rejang Lebong Students Mayub, Afrizal; Firdaus, M. Lutfi; Fahmizal, Fahmizal; Ruyani, Aceng; Lazfihma, Lazfihma; Dewi , Deshinta Arrova
Aktual: Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 1 (2025): Aktual: Jurnal Pengabdian Kepada Masyarakat January 2025
Publisher : CV Media Inti Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58723/aktual.v3i1.347

Abstract

This activity aims to Increase the Motivation and Science Literacy of SMP IT Khairu Ummah Rejang Lebong Students. This activity is one form of implementing the tridharma of higher education. One of the tri dharmas of higher education is community service, this service activity is an activity that every lecturer must carry out, therefore lecturers in the Master of Science program at Bengkulu University collaborated with IT SMP teacher Khairu Ummah Rejang Lebong Bengkulu on September 28, 2024, to carry out service activities at SMP IT Khairu Ummah Rejang Lebong. This collaboration takes the form of community service activities at SMP IT Khairu Ummah Rejang Lebong Bengkulu with the title "Robotics Workshop to Increase Motivation and Science Literacy of SMP IT Khairu Ummah Rejang Lebong Students". From these activities, it can be concluded that the teaching material delivered at the Robotics Workshop uses interactive multimedia which includes lectures, virtual demos, animations, visualizations, simulations and videos which have proven successful in motivating students in the motivated category with a score of 3.84 and increasing scientific literacy in the high category with a score of 3.93.
Biosynthesis of Gold Nanoparticles Using Wuluh Star Fruit (Averrhoa bilimbi) for Chromium Analysis Dewi, Ria Kemala; Firdaus, M. Lutfi; Nursa'adah, Euis
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 1 (2024): February 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i1.10188

Abstract

One of the heavy metals that can pollute waters is the heavy metal chromium (Cr). Chromium has many important roles in life. Chromium material is widely used by humans for various purposes, especially in the industrial world. However, the large number of uses of chromium in the industrial world and the waste it generates can have a negative impact on the environment and human health. One way to deal with chromium pollution is by analyzing the presence of chromium in waters. The aim of this research is to analyze the presence of chromium using a simple, effective, economical and accurate method, namely the biosynthesis of gold nanoparticles using samples of starfruit (Averrhoa bilimbi) as a bioreductor rich in ascorbic acid, with a colorimetric method, namely a method based on the aggregation of gold nanoparticles with ascorbic acid from starfruit, which causes a shift in plasmons and causes color changes that can be seen by the eye. Based on the analysis results, data was obtained that gold nanoparticles synthesized from the starfruit bioreductor can detect chromium with a concentration of 10 ppm with optimum conditions at pH 5, temperature 75oC, optimum incubation time of 5 minutes and gold nanoparticles are selective and sensitive for detecting chromium.
Pengembangan Sistem Digital Image Colorimetry (DIC) Untuk Pemantauan Polutan Nitrogen Di Perairan Mulia Ramadhani, Adella; Dono Wilopo, Mukti; Johan, Yar; Iresta Wardani, Firdha; Firdaus, M. Lutfi
PendIPA Journal of Science Education Vol 9 No 3 (2025): October
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/pendipa.9.3.794-800

Abstract

The presence of ammonia in waters needs to be monitored because of its toxic nature, especially in the form of free ammonia (NH₃). High concentrations of free ammonia can disrupt the balance of aquatic ecosystems, reduce dissolved oxygen levels, inhibit the growth of aquatic organisms, and even cause mass mortality in fish and other biota. The purpose of this study is to build the Digital Image Colorimetry system for detecting ammonia and assess the accuracy of the DIC method compared to the well-known established spectrophotometric method. Analysis from 5 locations of saline water, salinity and pH levels were still within normal limits, ranging from 33-34 ppt for salinity, while pH is 7.5-7.9. The ammonia content at the sampling point was still considered safe, in accordance with the quality standard (0.3 ppm). The results of ammonia concentration measurements using the DIC method and the spectrophotometric method show a neglegible level of difference and have an accuracy value above 90%. These findings indicate that DIC can be used as an alternative method for measuring ammonia, especially for rapid analysis in the field.
Co-Authors ACENG RUYANI Anggraini, Yestilia Anni Anggraeni, Anni BHAKTI KARYADI Dewi , Deshinta Arrova Dewi, Ria Kemala Elsi Adelia Fitri Endang Suswati Endang Widi Winarni Esterlin Fahima, Bima Fahmizal, Fahmizal Fauzan, Ahmad Al Firmanul Catur Wibowo Fitri April Yanti, Fitri April Geminastiti, Elis Anggun Hadi, Hanifa Rahma Hadirama, Khanna Hendrati, Diana Henny Johan Iresta Wardani, Firdha Iwan Setiawan Junaini, Junaini Lazfihma, Lazfihma Mardhotillah, Yulia Mayub, Afrizal Mukti Dono Wilopo Mulia Ramadhani, Adella Nursa'adah, Euis Nursaadah, Euis Nursa’adah, Euis Wikrama Putra, Syalendra Putri Anjarsari Ramadhan, M. Rizqi Renata, Maria Rotami, Ladya Ruyani, Aceng Wikrama Santhy Wyantuti Suherman, Suherman Walid, Ahmad Wardana, Rendy W. Wardana, Rendy Wikrama Yar Johan, Yar Yunitasari Yunitasari, Yunitasari Zico Fakhrur Rozi Zulkarnain Zulkarnain