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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Walisongo Journal of Chemistry Jurnal Ilmiah Mandala Education (JIME) Hydrogen: Jurnal Kependidikan Kimia Abdi Masyarakat JPIn : Jurnal Pendidik Indonesia Hydrogen: Jurnal Kependidikan Kimia Bioscientist : Jurnal Ilmiah Biologi Lumbung Inovasi: Jurnal Pengabdian Kepada Masyarakat Empiricism Journal Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Bakti Sekawan : Jurnal Pengabdian Masyarakat Journal of Authentic Research INTAN CENDEKIA: JURNAL PENGABDIAN MASYARAKAT Sasambo: Jurnal Abdimas (Journal of Community Service)
Hulyadi, Hulyadi
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Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Identifying Analytical Thinking Skills in Forestry Students: Understanding Climate Change Awareness in the 21st Century Context Muhali, Muhali; Hulyadi, Hulyadi; Khaeruman, Khaeruman; Gargazi, Gargazi; Azmi, Irham
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Vol 13, No 2: April 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-ps.v13i2.13644

Abstract

Climate change is a critical global issue with complex and far-reaching impacts that extend beyond the environment to include social, economic, and health dimensions. Addressing these challenges requires future professionals, such as forestry students, to develop strong analytical thinking skills, particularly in identifying and formulating environmental problems. Despite the growing recognition of climate change, limited research exists on forestry students’ understanding and analytical response to this issue, especially within specific regional contexts such as West Nusa Tenggara (NTB), Indonesia—a region particularly vulnerable to climate-related effects. This study aims to examine the level of awareness among forestry students regarding climate change issues in NTB and to evaluate their problem-identification and problem-formulation skills based on the phenomenon of global warming in the area. The novelty of this research lies in its regional focus, as NTB is seldom featured in climate literacy studies despite its unique climatic challenges. Using a descriptive quantitative method, data were collected from 26 forestry students enrolled in a Basic Chemistry course through an essay-based test administered in October. The variables observed were environmental awareness, problem-formulating ability, and problem-identifying ability. Data analysis was conducted descriptively and presented in tables and graphs. Results showed low student performance across all variables, with mean scores of 44.6 (awareness), 50.96 (problem formulation), and 40.76 (problem identification). These findings underscore the urgent need for strategic, problem-based educational approaches to improve students’ climate awareness and analytical competencies, ultimately preparing them to effectively contribute to sustainable environmental solutions in their future professional roles.
Increase In Macro Nutrients By Adding Banana Waste To Liquid Organic Fertilizer Hendrawani, Hendrawani; Hatimah, Husnul; Hulyadi, Hulyadi
Jurnal Ilmiah Mandala Education (JIME) Vol 7, No 3 (2021): Jurnal Ilmiah Mandala Education
Publisher : Lembaga Penelitian dan Pendidikan Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jime.v7i3.2345

Abstract

Liquid organic fertilizer is a solution from the fermentation of organic materials by involving microorganisms as a destructor of macromolecular compounds into minerals that are easily absorbed by plants. The quality of organic fertilizers is the main ingredient to get productive plants. The quality of organic fertilizer is determined by the concentration of macro nutrients such as nitrogen (N), potassium (K), and phosphorus. Getting high amounts of macronutrients fertilized organically is not easy. Macro-nutrients in organic waste with high concentrations are very difficult to obtain because each organic waste does not have all three macro-nutrients simultaneously. It takes a combination of organic waste to increase the concentration of macro nutrients in organic fertilizers. The combination of tofu whey with banana waste is one technique to obtain organic fertilizers that are high in phosphorus content. This study aims to obtain the effect and conditions of fermentation on the addition of mass of banana waste to produce optimum levels of phosphorus (P) in liquid fertilizer of tofu waste. The type of research used is pre-experimental research. The design of this study used a completely randomized design (CRD) with two factors, namely the first factor was the mass of banana waste (X) (X1 = 250 grams, X2 = 500 grams, X3 = 750 grams) and the second factor was the fermentation time (Y) (Y1 = 14 days, Y2 = 28 days, Y3 = 42 days). Determination of phosphorus content using UV-Vis spectroscopy instrument. Parameters measured were phosphorus (P) levels in liquid organic fertilizer. The independent variables in this study were the mass of banana waste and fermentation time, while the dependent variable in this study was the phosphorus content of the liquid fertilizer produced. The results of the analysis show that the phosphorus content (P) produced is X1Y1 = 0.1%, X2Y1 = 0.5%, X3Y1 = 0.09%, X1Y2 = 0.5%, X2Y2 = 2%, X3Y2 = 1.9 %, X1Y3 = 0.2%, X2Y3 = 0.5% and X3Y3 = 0.5%. There is an effect with the addition of a mass of banana waste as much as 250 grams at a 12-day fermentation time. It can be concluded that the liquid fertilizer produced has exceeded the SNI quality standard.
Uji Aktivitas Antibakteri Ekstrak Daun Bridelia micranth Lombok pada Escherichia coli Bayani, Faizul; Sudiana, Endang; Hamdani, Ade Sukma; Wahyuni, Ida; Mujaddid, Jamilul; Hulyadi, Hulyadi
Bioscientist : Jurnal Ilmiah Biologi Vol. 11 No. 2 (2023): December
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v11i2.9931

Abstract

The aim of this research is to identify the antibacterial activity of Bridelia micranth Lombok extract on the pathogenic bacteria Escherichia coli. The independent variable in this study was the concentration of Bridelia micrantha leaf extract. The concentration of Bridelia micrantha leaf extract in this study was varied from 20%, 40%, 60%, and 80%. The dependent variable is the ability of Bridelia micrantha leaf extract as an antibacterial. The antibacterial ability of Bridelia micrantha leaf extract was measured based on the diameter of the clear zone with three repetitions. As a comparison, an antibacterial is used, namely amoxicillin. Data analysis in this research was carried out descriptively, and then non-parametric tests were carried out to test the homogeneity of the data. In this study, the antibacterial ability of Bridelia micrantha leaf extract was discovered. At a concentration of 20%, the average diameter of the inhibitory zone was 2.5 mm which was categorized as none (resistance), 40% concentration was 9.83 mm in the non-existent category (resistance), 60% concentration was 13.66 in the weak category (intermediate), and at a concentration of 80% 16.5 mm is in the medium (sensitive) category. The research results indicated that Bridelia micrantha leaf extract had antibacterial activity against Escherichia coli bacteria. When compared with amoxicillin, the ability of Bridelia micrantha leaf extract as an antibacterial is still lower. Amoxicillin was able to inhibit the growth of Escherichia coli by 18.13 mm, while the highest ability of Bridelia micrantha leaf extract was 16.5 mm. Based on Ministry of Health regulations, antibacterials can be used if the inhibition zone is between 14-18 mm. So, Bridelia micrantha leaf extract can be used as an antibacterial, but it needs to be tested further before being applied to the public.
Identification of Antioxidant Activity of Bridelia Micrantha Bark Using the DPPH Method Bayani, Faizul; Rosmayanti, Baiq; Hamdani, Ade Sukma; Bimaharyanto, Deden Eka; Hulyadi, Hulyadi
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 2 (2024): April-May 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i2.11346

Abstract

This research aims to identify the antioxidant activity of Bridelia micrantha stem bark using the DPPH method. This research is a laboratory experimental research. Antioxidant activity was measured using the DPPH (2,2-diphenyl-1-picrylhydrazyl) method. Melandean Bark Extract is made using the maceration method with 80% methanol solvent. Identification of antioxidant activity was carried out at concentrations of 20 ppm, 40ppm, 60ppm, 80ppm, and 100ppm. Vitamin C was used as a positive control. Absorbance measurements were carried out using a UV-Vis spectrophotometer at a wavelength of 517nm. The test results in this research showed that the IC50 value of melandean bark extract was 85.54 ppm. Melandean bark extract is classified as a strong antioxidant.
Review of Secondary Metabolites From Melandean Bark Extract (Bridellia Micrantha): Bioactive Potential and Applications in Health Bayani, Faizul; Muhali, Muhali; Yuliana, Devi; Hulyadi, Hulyadi; Gargazi, Gargazi
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.11956

Abstract

Abstract The emergence of various diseases affecting the immune system, such as COVID-19 and Hand, Foot, and Mouth Disease, demands serious attention. Current climate changes occurring in almost all parts of the world can lead to the emergence of various viruses and bacteria that cause multiple diseases. Exploring medicinal plants that can enhance the immune system is crucial to be continued. This study aims to identify secondary metabolite compounds contained in Bridellia Micrantha plants using chemical reagents and gas chromatography-mass spectrometry (GC-MS) instruments. This research is an experimental laboratory study. The variable studied is the content of secondary metabolite compounds. Data were collected using chemical reagents and instruments. The obtained data are described in informative tables and graphs. Based on the identification results using instruments, positive results were found for organic compound groups such as flavonoids, alkaloids, and tannins. GC-MS test results showed that the organic compounds  contained in Bridellia Micrantha extract are 43.05% hexadecanoic acid, 21.46% oleic acid, 16% docos-13-enoic acid, 3.89% octadecanal, 1.85% propanediol, and 0.91% trans-phytol. Literature reviews indicate that the organic acids in Bridellia micrantha extract have clinical activities as antioxidants and anti-inflammatory agents, while organic compounds containing hydroxyl groups have clinical activities as anti-cancer agents. Based on these findings, Bridellia micrantha extract has the potential as a medicine that can enhance the body's immunity.  
Exploration of Student Thinking Systems Through STEM-PjBL Project Based Learning in the Science Field Sukarma, I Ketut; Hulyadi, Hulyadi; Muhali, Muhali; Azmi, Irham
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.12273

Abstract

The complexity of science concepts which are interrelated with each other requires the competence to think systematically. Complex thinking which is the basis for critical, analytical, creative and metacognitive thinking is very important to master in responding to the challenges of the 21st century. The aim of this research is to explore students' thinking systems taught using the STEM-PjBL model. This research is quantitative descriptive research. The variables studied are students' thinking systems based on the ability to determine components that influence each other in the bioethanol synthesis and dehydrator processes. The population in the study was 17 students. Students are distributed in two semesters, namely semesters II and IV. The research uses pre-test and post-test systematic thinking ability tests as data collection techniques and tools. The test consists of 5 essay questions that assess students' systematic thinking competence, and the test used is analyzed for validity, discrimination power, and level of difficulty before use. This test was developed based on indicators of systematic thinking competency. Tests were given to students before and after carrying out project activities for making and dehydrating bioethanol. After carrying out the project, students strengthen their competence through computational simulations related to the project being carried out. The data obtained is then presented in a communicative graph. The research results showed that 35.2% had high system thinking, 29% medium, 35.6% low. These results show that the application of the STEM-PjBL model is able to foster students' systematic thinking competency.
Antioxidant Activity Analysis of Ethanol Extract from Melandean Leaves (Bridelia micrantha) Using the DPPH Assay Bayani, Faizul; Rahayu, Lale Budi Hutami; Rahayu, Supiani; Huaida, Nurul; Yuliana, Depi; Hulyadi, Hulyadi; Gargazi, Gargazi
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13855

Abstract

The increasing global prevalence of oxidative stress-related diseases such as cardiovascular disease, diabetes, and neurodegenerative disorders underscores the importance of developing effective antioxidant strategies. In this study, samples of ethanol extract from Bridelia micrantha (Melandean) leaves were used which were then evaluated using the DPPH (2,2-diphenyl-1-picrylhydrazyl) test, a method that is widely known for assessing free radical scavenging activity. The ethanol extract sample was obtained through maceration with a yield of 15.84%. Based on the DPPH test, it shows that the extract has dose-dependent inhibition of DPPH radicals, with a maximum inhibition of 66.13% at a concentration of 25 ppm. The IC50 value, calculated from regression analysis, confirmed the antioxidant potential of the extract, although it was less effective than that of vitamin C, which was used as a positive control. These findings suggest that Bridelia micrantha leaves, rich in phytochemicals such as flavonoids, tannins, and saponins, have the potential as a source of natural antioxidants for managing oxidative stress-related health conditions.
Evaluating Glycerol's Performance as a Sustainable Dehydrator in Ethanol Purification Muhali, Muhali; Hulyadi, Hulyadi; Bayani, Faizul
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.14417

Abstract

This research aims to evaluate the effectiveness of glycerol as a dehydrator in the process of purifying ethanol solutions. This study is a quantitative descriptive research aimed at analyzing the effectiveness of glycerol, derived from used cooking oil, as a water dehydrating agent in the ethanol purification process. Data obtained will be quantitative and statistically analyzed to evaluate glycerol's performance as a dehydrator. The research was conducted at the Chemistry Laboratory of Mandalika Education University (UNDIKMA) over a specific period according to the research schedule.Independent Variable is glycerol from used cooking oil as a dehydrating agent. The concentration of glycerol used is determined based on the percentage of glycerol in the ethanol solution. Dependent variable the effectiveness of ethanol purification, measured through the comparison of density and percentage of standard bioethanol and Controlled variables is Temperature and pressure during the dehydration process, duration of the purification process, and the initial ethanol concentration before purification. Data analysis uses a simple regression curve that follows Lambert Beer's law. In conclusion, the results obtained (increasing the ethanol concentration to 90.5%) show that glycerol is a very effective dehydrator in reducing water content, especially for solutions with high water content such as ethanol at an initial concentration of 23.3%.
Local Wisdom in Herbal Medicine Processing: The Role of Health Practitioners in Maintaining Tradition and Innovation Bayani, Faizul; Hulyadi, Hulyadi; Yuliana, Depi; Listantia, Nora; Hamdani, Ade Sukma
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 2 (2025): April 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i2.15218

Abstract

This study explores the role of local wisdom in traditional herbal medicine processing among the Sasak community in Lombok, Indonesia. The focus is on the extraction techniques used by traditional healers (belian), especially their selection of specific woods for the heating process to preserve the stability of bioactive compounds. Using a qualitative descriptive method, data were collected through interviews, observations, and documentation involving experienced traditional practitioners. The findings show that belian possess inherited empirical knowledge that integrates technical, ecological, and spiritual considerations. This includes selecting herbal plants based on environmental quality, using sustainable harvesting methods, and applying low-heat boiling techniques to prevent degradation of sensitive compounds such as flavonoids and alkaloids. Additionally, spiritual rituals and intuitive practices accompany the preparation process, reflecting a holistic healing philosophy. The study reveals that these traditional methods align with modern principles of sustainable and effective herbal extraction. The integration of traditional knowledge with scientific understanding presents an opportunity to develop culturally rooted, low-cost, and environmentally friendly healthcare solutions. The preservation and documentation of this local wisdom are essential for future generations and the advancement of ethnopharmacological science.
Correlation Profile of Cognition Levels and Student Ability to Solve Problems in Biodiesel Synthesis Hulyadi, Hulyadi; Bayani, Faizul; Muhali, Muhali; Khery, Yusran; Gargazi, Gargazi
Jurnal Penelitian Pendidikan IPA Vol 9 No 6 (2023): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i6.3130

Abstract

Covid-19 has had a huge impact in all sectors. The socio-economic sector experienced the heaviest impact. One of the sectors affected is the world of education. Education is now transforming from face-to-face learning to online learning. Online learning is very helpful for students during covid-19. In addition to having a positive value, online learning also contains a negative value. For example, students' interest in reading increases, but on the other hand, students' reading power is low. Low reading power has an impact on decreasing the cognitive level of students. The purpose of this research is to first identify the cognitive level profiles and students' abilities in solving problems in the synthesis of biodiesel from used cooking oil. Analyzing the correlation between cognitive level and students' ability to solve problems. This research is a correlational descriptive research. This research was conducted on fourth semester chemistry education students who were taking an instrument chemistry course and determining the structure of organic compounds. Cognitive level and problem-solving ability were measured using a rubric for assessing cognitive level and student problem-solving ability. The data obtained is then described in graphical form. The data was then tested for correlation using the SPSS product moment correlation test. In this study, it was found that the cognitive level of most students entered at C2 and C3 levels and the average problem solving ability was 53.84. The results of the correlation test show that the cognitive level is positively correlated with the ability of students to solve problems. This is evidenced by the comparison of the value of r count 0.724> r table 0.44. Based on the results of this study, it can be concluded that the cognitive level and problem solving abilities of students are still low. Cognitive level and problem solving ability are positively correlated
Co-Authors - Khaeruman Abd. Rasyid Syamsuri Ade Sukma Hamdani Agus Muliadi AHMADI Ahmadi Ahmadi Ahmadi Ahmadi Ali Imran Ali Imran Anita Fibonacci Anita Fibonacci Asy’ari, Muhammad Azmi, Irham Baiq Asma Nufida Baiq Asma Nufida Baiq Mirawati Bayani, Faizul Bilad, Muhammad Roil Bimaharyanto, Deden Eka Citra Ayu Dewi Dahlia Rosma Indah Darmatasyah Darmatasyah Darmatasyah, Darmatasyah Delila Idsa Amara Raymanda Devi Yuliana, Devi Endang Sudiana Fahrurrozi Fahrurrozi Faizul Bayani Fitriani, Herdiyana Gargazi Gargazi Gargazi Hamdani, Ade Sukma Hasmawati Wahab Helmi Rahmawati Hendrawani Hendrawani Hendrawani Hendrawani Hendrawani, Hendrawani Huaida, Nurul Hunaepi, Hunaepi Husnul Hatimah Husnul Hatimah, Husnul Ida Wahyuni Ida Wahyuni Ilyana, Nia Intan Dwi Hastuti Irma Utu Nganji Istin Fitriana Aziza Izzatunnisa Izzatunnisa Izzatunnisa Izzatunnisa, Izzatunnisa Jamilul Mujaddid Jupriadi, Lalu KETUT SUKARMA . Khaeruman Khusnul Khotimah khusnul khotimah Listantia, Nora M. Muhali Masiah Masiah Mirawati, Baiq Muhali Muhali Muhali Muhamad Zaenudin Muhammad Asy'ari Muhammad Fuaddunazmi Muhammad Roil Bilad Muhammad Sabri Mujaddid, Jamilul Ni Nyoman Sri Putu Verawati Nia Ilyana Pahriah Pahriah Pahriah PAHRIAH, PAHRIAH Putri, Yuli Anggraini Rahayu, Lale Budi Hutami Rahayu, Supiani Rosmayanti, Baiq Subagio Subagio, Subagio Sudiana, Endang Suryati Suryati Sutarto Sutarto Taufik Samsuri Wahab, Hasmawati Wiwik Handayani Yuli Anggraini Putri Yuliana, Depi Yusran Khery, Yusran Yusril Anwar Zul Anwar