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Nadia Amida
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INDONESIA
Alotrop Jurnal Pendidikan dan Ilmu Kimia
Published by Universitas Bengkulu
ISSN : 22528075     EISSN : 26152819     DOI : -
Core Subject : Science, Education,
Chemistry Education
Welcome to the Journal Alotrop, is an Open-Acces and peer-reviewed journal aims to publish scientific articles related to chemistry and education :i.e an interaction between natural sciences, educational sciences, technologies and management for both education and sciences and wise use of resources. We particularly encourage manuscripts that discuss contemporary research that can be used directly or inderecly in adressing critical issues and sharing of advanced knowledge and best practices in chemistry and education.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 218 Documents
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PENGEMBANGAN E-MODUL PROJEK PENGUATAN PROFIL PELAJAR PANCASILA FASE E PADA TEMA KEARIFAN LOKAL DAERAH BENGKULU: PENGEMBANGAN E-MODUL PROJEK PENGUATAN PROFIL PELAJAR PANCASILA FASE E PADA TEMA KEARIFAN LOKAL DAERAH BENGKULU Vannesa Okta Andyani; Dewi Handayani; Hermansyah Amir
ALOTROP Vol. 8 No. 2 (2024): Alotrop 2024
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i2.37864

Abstract

This research is a study and development of an e-module project to strengthen the Pancasila student profile phase E on the theme of local wisdom in the Bengkulu area. This research aims to determine the feasibility level of the e-module and the students' responses to the developed project e-module. The development of this e-module uses the ADDIE development model (Analyze, Design, Develop, and Evaluation), which is limited only to the Develop stage. The research was conducted from May to July at SMAN 1 Kota Bengkulu. The subjects of the research were 36 tenth-grade students of class X.B at SMAN 1 Kota Bengkulu. The instruments in this research were interview sheets, validation sheets, and student response questionnaires. The results of this study showed that (1) the feasibility level of the e-module had a score of 93.6% with a category of very feasible, and (2) the student response test results to the e-module obtained a score of 89.0% with a category of very good. This means that the e-module project to strengthen the Pancasila student profile phase E on the theme of local wisdom in the Bengkulu area is suitable for use.
BIOSINTESIS NANOPARTIKEL PERAK MENGGUNAKAN EKSTRAK AIR DAUN KECEMCEM (Spondias pinnata (L.f) Kurz.) DENGAN VARIASI KONSENTRASI EKSTRAK DAN SUHU SINTESIS Ngurah Wijaya Putra; Gusti Ayu Dewi Lestari
ALOTROP Vol. 8 No. 2 (2024): Alotrop 2024
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i2.37978

Abstract

This research aims to synthesize silver nanoparticles using various variations in extract concentration and synthesis temperature to produce the smallest and most stable silver nanoparticle. Step of this research are phytochemical screening of kecemcem leaf water extract, synthesis of silver nanoparticles with an extract concentration of 0.5; 0.75 and 1% and synthesis temperature 25; 40 and 60⁰C, and characterization of silver nanoparticles. The results of the UV-Vis spectrophotometer showed the formation of NPAg with a maximum wavelength of 420 nm. SEM and TEM results show that NPAg powder tends to clump and has an irregular round shape. PSA results show that the smallest size of NPAg is 30.55 nm with a PdI of 0.497. XRD results show that the crystal size of the synthesized NPAg is 0.23 nm.
Analisis Miskonsepsi Siswa pada Materi Stoikiometri Menggunakan Test Diagnostic Essay Berbantuan CRI Delta Novita Sari; Nurhamidah; Wiwit
ALOTROP Vol. 8 No. 2 (2024): Alotrop 2024
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i2.38209

Abstract

This research is a quantitative descriptive study which aims to determine students' misconceptions about stoichiometry material using a diagnostic essay test instrument assisted by the Certainty Of Response Index (CRI) at SMA Negeri 9 Bengkulu City. The field trial sample included 24 students of class X MIPA 1 and an implementation sample of 27 students of class The results of the empirical validation test obtained 17 fit questions and 2 misfit questions from the 19 questions tested. The results of the differential power test showed that 19 items tested were included in the good differential power category with logit standard error (SE) values for 19 items < 0.5. The research results showed that overall student misconceptions were 25% in the low category. The highest misconception lies in the concept of determining product mass, with a misconception percentage of 52%, which is in the medium category. Keywords: misconceptions, test diagnostic essay, stoichiometry.
PENGEMBANGAN INSTRUMEN PENILAIAN THREE-TIER MULTIPLE CHOICE UNTUK MENGUKUR KETERAMPILAN BERPIKIR KRITIS SISWA PADA MATERI TERMOKIMIA Putri Nopita Sari; Rina Elvia; Elvinawati
ALOTROP Vol. 8 No. 2 (2024): Alotrop 2024
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i2.38225

Abstract

The purpose of this study is to develop a three-level multiple choice assessment instrument to measure critical thinking skills of students at SMA Negeri 5 Bengkulu City on thermochemical material. The development model used is the ADDIE model. The research subject is class XI MIPA 4 at SMA Negeri 5 Bengkulu City in the academic year 2022/2023. The research data were obtained from needs analysis, expert validation sheets, empirical test analysis, reliability, difficulty level, discriminatory power, distractor analysis, and analysis of students' critical thinking skills. The number of instruments developed is 20 three-tier multiple choice questions. The results of the study: (1) The three-level multiple choice test instrument on the thermochemical material developed was declared valid by the validator with a minimum CVR value of 0.78 and a CVI value of 0.91 with a very good category (2) The results of the empirical validity test carried out on 68 students and obtained 14 valid questions (3) A three-level assessment instrument with several choices that can be used to measure students' thinking skills (4) The results of the implementation of developing critical thinking skills instruments obtained 2 students with very critical categories, 2 students with critical categories, 16 students in the moderately critical category, 13 students in the less critical category, and 1 student in the uncritical category. (4) The results of the development of the three-tier multiple choice assessment instrument can be used to measure students' critical thinking skills.
PENGEMBANGAN PERANGKAT AJAR KURIKULUM MERDEKA PADA MATERI PEMANASAN GLOBAL DALAM MEMBANGUN MERDEKA BELAJAR Faizah Al Munawwarah; Hermansyah Amir; Wiwit
ALOTROP Vol. 8 No. 2 (2024): Alotrop 2024
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i2.38252

Abstract

This research is based on the limited references to existing independent curriculum teaching tools. This research aims to develop an independent curriculum teaching tool on global warming material to see the feasibility, response of educators and the effectiveness of the teaching tool. The type of research used is Research and Development (R&D) according to Sugiyono which consists of 10 stages, namely potential and problems, data collection, product design, design validation, design revision, small scale trials, product revisions, large scale trials, product revisions. , and mass production, but this research is limited to large-scale tests. The product in this research is a teaching tool, namely a teaching module. The research was conducted in April-September 2023 at MAN 1 Bengkulu City with the research subjects being class X 3 students at MAN 1 Bengkulu City, totaling 34 students. The research instruments used were interviews, validation sheets, response questionnaires and test instruments. The results of the teaching device feasibility test were said to be very valid with a score of 87.69%. The results of the educator response test were very good with a score of 91%, which educators felt was helpful in expressing the concept of global warming with simple experiments and was useful for students in building independent learning so as to increase understanding and learning outcomes in global warming material. The effectiveness of the teaching tools can be seen from the N-Gain, which is 0.618 in the medium category, which shows that the use of the Guided Discovery Learning-based independent curriculum teaching tools that were developed has proven to be effective in improving student learning outcomes on global warming material.
SINTESIS DAN KARAKTERISASI METAL ORGANIC FRAMEWORKS La-NDC SERTA POTENSI APLIKASINYA SEBAGAI SENSOR SENYAWA BORAKS Muhammad Akbar Chaniago; Sura Menda Ginting; Febrian Solikhin
ALOTROP Vol. 8 No. 2 (2024): Alotrop 2024
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i2.38269

Abstract

This study aim is to synthesize and characterize metal organic frameworks La-NDC and determine the electronic response to borax (H3BO3) compounds. The method used to synthesize La-NDC MOFs is the solvothermal method with dimethylacetamide (DMA) as solvent. The research was conducted in the learning laboratory of FKIP UNIB and the Basic Science laboratory of FMIPA UNIB from April to June 2022. The synthesis stages of La-NDC MOFs consisted of six stages, namely preparation, mixing, heating and cooling, washing, drying and weighing. Yield results obtained as much as 70.77% and 63.85%. The results showed that La-NDC MOFs have been synthesized with a slightly yellowish white crystalline form. Characterization of La-NDC MOFs was carried out using FTIR, SEM and XRD methods. The results of FTIR characterization showed that Lanthanum metal ions had coordinated with NDC ligands to form a network of MOFs, XRD characterization results showed that La-NDC MOFs had good crystallinity and SEM characterization results showed that the morphology of La-NDC MOFs resembled irregular rocks with diameters ranging from 73 - 581 m. The analytes used for the response test were borax, benzene, toluene and formalin. The electronic response test of La-NDC MOFs was carried out using a UV-Vis spectrophotometer at a wavelength range of 200-800 nm. The results of the electronic response test on the sample of MOFs with borax show that La-NDC MOFs have no potential as sensors because they do not show specific electronic behavior towards borax
PENGEMBANGAN KOMPONEN INSTRUMEN TERPADU (KIT) PRAKTIKUM KIMIA Tiara Juliani; Elvinawati; Febrian Solikhin
ALOTROP Vol. 8 No. 2 (2024): Alotrop 2024
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i2.38581

Abstract

This research to determine the feasibility of the practicum KIT, responses and students' psychomotor abilities after using the developed KIT alternative media.  The development of this chemistry practicum KIT uses ADDIE development.  This research was conducted at SMA Negeri 9 Kota Bengkulu with research subjects namely 12 students of class XI MIPA 2 for small group trials and all students of class XI MIPA 3 SMA Negeri 8 Kota Bengkulu and SMA Negeri 9 Kota Bengkulu for large group trials.  The instruments in this research are interview sheets, student needs questionnaires, validation sheets, student response questionnaires, and psychomotor assessment sheets.  The results of this research obtained (1) The feasibility level of the chemistry practicum KIT was 94,05% with a very valid category, (2) The results of students' responses to the practicum KIT on calorimeter material obtained a percentage of 89,06% in the very good category, (3) The participants' psychomotor abilities  students obtained an average percentage at SMA Negeri 8 Kota Bengkulu of 92,17% and SMA Negeri 9 Kota Bengkulu of 96,95% the very good category.  The results of this research show that a chemistry practical KIT on calorimeter material has been developed which is very suitable for use and application in the learning process
PENGEMBANGAN MODUL KIMIA ORGANIK BAHAN ALAM BERBASIS RISET UNTUK MENSTIMULUS BERFIKIR KRITIS MAHASISWA Nurhamidah; Dewi Handayani; Wiwit
ALOTROP Vol. 8 No. 2 (2024): Alotrop 2024
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v8i2.38739

Abstract

Providing learning resources related to the use of natural resources and the environment around us is very necessary, so that the learning process in class is more active and interesting. This research aims to develop a natural product organic chemistry (KOBA) learning module based on research results on the use of natural product compounds, so that students are more motivated in learning. Research and Development (R&D) or development research uses the ADDIE development model which consists of Analysis, Design, Development, Implementation, and Evaluation. The research subjects were 24 seventh semester students of the 2023/2024 Bengkulu University FKIP Chemistry Education Undergraduate Study Program. Data collection techniques use expert validation questionnaire sheets and student response questionnaires and data analysis techniques use quantitative data analysis. The results of the research show that the validator's assessment of the developed module obtained an average score of 93.60%, which is included in the very valid category, while the results of student assessments of the developed module obtained an average of 93%, which is included in the very interesting category. Based on the results of the expert validation assessment questionnaire and student response questionnaire, it can be concluded that the module developed is very suitable for use as a learning resource in the learning process.
SINTESIS SILIKA DARI LIMBAH BOTOL KACA BAHAN KIMIA MENGGUNAKAN METODE SOL GEL Yani’ Qoriati; Akhmad Al Bari
ALOTROP Vol. 9 No. 1 (2025): Jurnal Pendidikan dan Ilmu Kimia
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v9i1.38591

Abstract

Chemical glass bottle waste can be used to make silica gel due to its high content of SiO2 composition. The aim of this research is to obtain silica which is extracted from chemical waste from glass chemical bottles and synthesized using the sol gel method. Chemical glass bottle waste can be extracted by alkali fusion. The mass ratio of glass powder: NaOH is 1:3. The calcination process is carried out at 800°C within 4 hours to obtain sodium silicate. Sodium silicate was then synthesized using the sol gel method by reacting with HCl to form a white gel. The gel was then left for 18 hours, then filtered. The resulting precipitate was washed until it reached pH 7. The drying process was in an oven at 80°C for 12 hours. The final product is white silica gel which was characterized using FTIR and XRD. FTIR was used to obtain typical absorption bands, such as the siloxane ring 447.5 cm-1, as well as the symmetric and asymmetric Si-O-Si stretching vibrations, namely 702.11 cm-1 and 1022.31 cm-1 , respectively. The XRD results produced a characteristic peak at 2 theta around 22-25°, which means that the silica gel structure obtained in this study has amorphous properties.  Keywords: Synthesis; silica gel; chemical glass bottle waste
SINTESIS NANOPARTIKEL ZnO MENGGUNAKAN EKSTRAK DAUN MANGGA (Mangifera sp.) DAN STUDI APLIKASINYA SEBAGAI FOTODEGRADASI CONGO RED Hasiah; Demi Dama Yanti; Bambang Ari Wahjoedi
ALOTROP Vol. 9 No. 1 (2025): Jurnal Pendidikan dan Ilmu Kimia
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v9i1.40396

Abstract

Zinc oxide (ZnO) is a widely studied semiconductor material due to its broad range of applications. ZnO is known for its stability and can be synthesized using various methods. One of the approaches employed in this study is the co-precipitation method with a green synthesis approach. The green synthesis principle applied in this research involves minimizing the use of synthetic chemicals by substituting them with natural materials. Mango leaves (Mangifera sp.), which are readily available in the environment, contain secondary metabolites which can act as the capping agents in synthesis ZnO nanoparticle. The role of the capping agent is to limit particle interactions, thereby reducing agglomeration. ZnO synthesis was carried out at a low temperature by mixing Zn²⁺ precursor, NaOH, and mangifera sp. leaf extract, followed by stirring. The heating process was conducted at 130°C for 4 hours. The synthesized material was characterized using X-ray diffraction (XRD), UV-DRS, and scanning electron microscopy (SEM). The characterization results confirmed that the ZnO sample exhibited a hexagonal wurtzite crystal structure, a nanoflower morphology, and a band gap energy of 3.26 eV. Keywords: ZnO; nanoparticles; photocatalyst; congo red; co-precipitation.

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