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Nadia Amida
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Jl WR Supratman Kandang Limun Bengkulu
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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 228 Documents
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PERBANDINGAN HASIL BELAJAR KIMIA SISWA MENGGUNAKAN KARTU TRUTH AND DARE DENGAN PEMBELAJARAN KONVENSIONAL Tiara Nitaria Sinaga; Nurhamidah Nurhamidah; Dewi Handayani
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i1.21800

Abstract

This study aims to find out how the student's chemistry learning outcomes on the periodic properties of elements in two grade X Mathematics and Natural Sciences at SMA Negeri 02 Mukomuko with the media card game Truth and Dare. The type of research used is a quasi-experimental study with a population of class X MIPA at SMAN 2 Mukomuko and the sample is class X MIPA 2 and class X MIPA 3. The sample in this study is class X Mathematics and Natural Sciences 3 as a control with conventional learning and class X Mathematics 2 as a control. experiment using truth and dare media. Analysis of the data used is the average value of posttest, normality test, homogeneity test, and t test. Data on student learning outcomes were obtained from the pretest and posttest scores with an average of 39.36 and 47.74 for the control class while the experimental class was 26.67 and 68. Then a t-test was carried out with a significant level (? = 0.05), then the value of t-count is 3.290 and t-table is 1.7084. The results showed that there were significant differences in learning outcomes between classes that used Truth and Dare card media and classes that did not use Truth and Dare card media.
EKSTRAKSI METABOLIT SEKUNDER DAN UJI ANTIOKSIDAN DARI DAUN MEDANG PERAWAS (Litsera Odorifera val) DENGAN METODE 1,1-DIPHENYL 2-PICRYLHIDRAZYL (DPPH) I Nyoman Candra; Theo Kuntara; Agus Sundaryono
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i1.22398

Abstract

Litseaodoriferaval.(MedangPerawas) is well recognized in Muko-Mukoregency, Bengkulu Province and used as construction material. In Serawai and Lembak Ethnic groups, it is traditionally used as medication for mouth sprue, stomachache,and boil as well as used for inducing lactation. This research aims to extract secondary metabolite compound group contained in Litseraodorifera val. leaf and to examine its antioxidant activity potency against 1,1-diphenyl 2-picrylhidrazyl (DPPH). A Fresh leaves from Litseraodorifera val. collected from Tahura Forest, Central Bengkulu area were separated into two parts: one run into chemical screeningand the second was used for extraction experiment using ethanol, ethyl acetate, hexane and acetone. Secondary metabolite compound groups contained in those extracts were tested for antioxidantactivity potency. The results showed that the extract of Litseraodorifera val. leaf contained compound group of flavonoid, saponin, tannin, phenolicand terpenoid. The extract of Litseraodorifera val. Leafincrude extract, ethyl acetate, acetone, ethanol and hexane can reduce free radical of  DPPH with IC50 of 250.7; 66.7; 69.7; 100.3 and 181.9 ppm respectively. Those are higher compared to vitamin C whose IC50 was 28.3 ppm. The extract of Litseraodorifera val. leaf haspotency as antioxidant activity that can be developed through further research.
PENGEMBANGAN LEMBAR KERJA PRAKTIKUM MAHASISWA BERBASIS RISET SOLID LIPID NANOPARTIKEL (SLN) TRIMIRISTIN HASIL ISOLASI BIJI PALA (Myristica fragrans) Pramesthi Regita Putri; Agus Sundaryono; Hermansyah Amir
ALOTROP Vol 6, No 1 (2022)
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i1.22399

Abstract

This research aims to determine the feasibility, practicality, and effectiveness of LKPM based on solid lipid research of trimiristin nanoparticles resulting from nutmeg seed insulation as a guide sheet of organic chemical practicum II in lipid matter. This research uses 4-D methods, consisting of 4 stages, namely define, design, develop, and disseminate. However, in this study the researchers only performed until the third stage which is the development stage (develope). This research data is obtained from the results of material and media expert validation questionnaires, product practicality questionnaires as well as pretest and posttest results tested to fourth semester students who participated in organic chemistry course II.LKPM based on Research Solid Lipid Nanoparticle (SLN) Trimiristin resulting from Nutmeg Seed Isolation that has been developed obtained a value of 83.75% on media validation and obtained a value of 87.3% on material validation, which means it is in the category of highly feasible. While the practicality percentage result of 88.36 % on the small-scale test, which goes into the category strongly agrees, The average result that means students strongly agree that the products that have been developed are very practical to use. The average value of N-Gain Small Scale Test Score is 0.43, meaning it can be concluded that The Student Practicum Worksheet (LKPM) based on Solid Lipid Nanoparticle (SLN) trimiristin research resulting from Nutmeg Seed Isolation (Myristica fragrans) has moderate effectiveness value.
Pembuatan Membran Dari Ampas Tebu dan Aplikasinya Untuk Menyaring Air Tanah dan Air Gambut I Nyoman Candra; Sugiono; Hermansyah Amir
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.24324

Abstract

The production and use of a membrane filter made from bagasse (Saccharum officinarum) to filter ground water and peat water had been conducted. The purpose of this research are to evaluate the yield of membrane filter produced from bagasse, assess its ability to filter ground water and peat water as well as to measure the physical and chemical properties covering pH, turbidity and iron concentration, of those waters after filtered out with the membrane filter. Bagasse was used as a raw material for producing membrane filter through pulping process, followed by vulcanized fiber method using ZnCl2. From 100 g of bagasse, 38.7% membrane filter was produced. The membrane filter could increase ground water and peat water quality by increasing ground water and peat water pH from 6.7 to 7.2 and from 6.1 to 7.4 respectively. It also reduced ground and peat water turbidity from 48.33 to 1.67 NTU (96%) and from 65 to 2.67 NTU (96%) respectively. Iron concentration declined from 4.67 to 0.056 mg/L (for ground water) and from 3.645 to 0.121 mg/L (for peat water) respectively. Membrane filter produced from bagasse could improve ground and peat water quality after filtered out, whose physical and chemical properties met the quality standard of water according to Health Ministry Regulation of Republic of Indonesia No.492/Menkes/Per/IV/2010.
PENGEMBANGAN MEDIA PEMBELAJARAN MIT APP INVENTOR BERPLATFORM ANDROID PADA MATERI STOIKIOMETRI DI KELAS X MIPA SMAN 7 KOTA BENGKULU Ruth Sinthia Ginting; Sura Menda Ginting; Hermansyah Amir
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.24345

Abstract

This study aims to test the feasibility of learning media and determine student responses to the developed learning media. This type of research is research and development using a development model adapted from the Borg & Gall model, namely: 1) Potential and Problems, 2) Data Collection, 3) Product Design, 4) Design Validation, 5) Design Improvement, 6) Product Trial, 7) Product Revision, 8) Usage Trial, 9) Product Revision, and 10) Mass Product Manufacturing. But in this research, the research stages are limited to the sixth step namely the product trial stage. The research instruments used were interview sheet with chemistry teachers, questionnaires sheet to validate learning media and student response questionnaires to the developed media. The research was conducted at Bengkulu University and at SMAN 7 Bengkulu City with a research sample of 36 students of class X MIPA 4. From the research results obtained from learning media according to material expert validators is 88.75% and according to media expert validators is 90.90%. The average percentage of the feasibility of the learning media developed is 89.825%, so based on the results of validation by all validators, it is stated "Very Valid". Based on the results of product trials, the results of student responses in class to the MIT App Inventor learning media on stoichiometry material obtained a percentage of 89.27% ​​which was included in the very good category. The results of this study indicate that the MIT App Inventor learning media on stoichiometric material that has been developed is very feasible to use and feasible to be applied to the learning process
PENGEMBANGAN MEDIA PEMBELAJARAN KIMIA BERBASIS GUIDED DISCOVERY PADA MATERI LARUTAN PENYANGGA Ica Nur Azizah; Salastri Rohiat; Sura Menda Ginting
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.24423

Abstract

This study aims to determine the level of feasibility and student response to guided discovery-based chemistry learning media that was developed. This type of research is research and development with the ADDIE model. The trial was conducted on a small scale with 30 students of class XII MIPA 1 SMAN 4 Bengkulu City. The research data were obtained from material validation questionnaires, media validation questionnaires and student response questionnaires. From the results of the study, it was found that the feasibility level of chemistry learning media in the material aspect was 89.77% with a very valid category while in the media aspect it was 92.85% with a very valid category. The results of student responses to chemistry learning media obtained a percentage of 92.15% with a very interesting category. These results indicate that the guided discovery-based chemistry learning media on the buffer solution material produced in this study is very feasible to be used in the learning process
PENGEMBANGAN BAHAN AJAR BERBASIS ANDROID PADA MATERI SISTEM KOLOID MELALUI PENDEKATAN PROBLEM BASED LEARNING Nabilah Diomara; Dewi Handayani; Rina Elvia
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.24968

Abstract

This study aims to determine the level of feasibility, level of readability, student response and level of student understanding after using android-based teaching materials on colloidal system materials through the Problem-based Learning approach. The model used in this development research is ADDIE which consists of the stages of analyze, design, development, implementation and evaluation. The research was conducted at SMA Negeri 2 Rejang Lebong with research subjects, namely 9 students of class XII MIPA 2 for small-scale trials and 35 students of class XII IPA 4 for large-scale trials. From the results of the study, it was found that (1) the feasibility level of android-based teaching materials on colloidal system materials through the Problem Based Learning approach was stated to be very valid and very legible. This is shown from the results of the validity test and readability test obtained, namely the percentage of validity of the material expert's assessment of 87.22 %, the percentage of validity of the assessment of media experts by 92.17 % and the percentage of readability of the assessment from students of 86.98 %, (2) student responses are stated to be very interesting, judging from the results of student responses obtained by 87.26%, (3) the level of student understanding after using android-based teaching materials through the Problem Based Learning approach is at a moderate level seen from the results of the N-Gain average score obtained from the pre-test and post-test values ​​of 0.65. The results of this study indicate that android-based teaching materials through the Problem Based Learning approach that have been developed are feasible to be used as teaching materials in realizing active learning and helping students understand colloidal system material. Keywords : teaching materials, android, colloid system, problem based learning
Pengembangan media pembelajaran berbasis android dengan Lectora Inspire pada mata kuliah Kimia Anorganik II Wiwit Alwi; Hermansyah Amir; Emilia Febrianti
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.25041

Abstract

This study aims to determine the level of feasibility, student responses, and improvement of student learning outcomes after using teaching materials developed using Lectora Inspire on Inorganic Chemistry II material. The development of teaching materials uses a 4D development model. The research subject was students of the Chemistry Education Study Program of the University of Bengkulu. The instruments in this study were undergraduate student questionnaires, validation sheets, pretest, and posttest sheets. It was found that (1) the media developed using Lectora Inspire were declared very feasible by media and material experts with percentages of 89.8% and 90.5%, (2) students' responses to the teaching materials used developed using Lectora Inspire is in the excellent category with an average percentage of 88.8%, (3) an increase in learning outcomes as measured by the average N-gain score 0.64 on the moderate criteria. The media developed using Lectora Inspire can be used as teaching materials to improve students' understanding of Inorganic Chemistry II material.   Keywords: media, learning outcomes, inorganic chemistry, chemistry bonding
IDENTIFIKASI MISKONSEPSI SISWA PADA PEMBELAJARAN KIMIA MENGGUNAKAN METODE FOUR-TIER DIAGNOSTIK TEST DI SMA NEGERI 03 KOTA BENGKULU Trisan Amelia; Rina Elvia; Dewi Handayani
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.25099

Abstract

This research is a quantitative study that aims to find out misconceptions that occur in class X science students of SMAN 03 Bengkulu City on Stoichiometry material. The data obtained in this study were collected by means of a written test on an instrument that has been tested for validity, , reliability, difficulty index, and discriminatory power. The results of the analysis of the percentage of misconceptions that occur in the stoichiomeric material at SMAN 3 Bengkulu City are in the range of 0%-2,2%. Based on the literature, misconceptions with this number range are in the category of moderate misconceptions. The misconception with the smallest percentage value is in item number 2 with a percentage of 0,1%, namely in the sub-topic of Atomic Mass. The misconception with the most significant percentage figures occurs in questions number 9 and 10 or in the sub-chapter interconversion of moles and chemical calculations, which is 2,2%. Factors that cause misconceptions consist of internal factors caused by the students themselves, and external factors that cause environmental factors. These factors are wrong preconceptions or initial concepts, learning methods, student abilities, lack of interest and motivation to learn, wrong intuition, and inadequate books.
PENGEMBANGAN E-MODUL BERBASIS KEMAMPUAN BERPIKIR KREATIF MENGGUNAKAN FLIP PDF PROFESSIONAL PADA MATERI KOLOID DI SMAN 4 KOTA BENGKULU January Prayogi; Nurhamidah; Salastri Rohiat
ALOTROP Vol. 6 No. 2 (2022): Pembelajaran Abad 21
Publisher : University of Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/alo.v6i2.25224

Abstract

This study aims to determine the feasibility and students' responses to an e-module based on creative thinking skills using flip pdfprofessionalprogram on colloidal material. This research was a research and development (research and development) that adapts from the Borg & Gall model which is limited to the seventh stage, namely product revision. The sample in this study were students of class XI MIPA 1 SMA N 4 Singaran Pati,Bengkulu City with a total sample of 33 people. The sample selection in this study used a purposive sampling technique. The data in this study were obtained from interviews, material and media validation questionnaires, and student response questionnaires. The results of the validation test of e-module materials and media obtained values ​​of 4.25 and 4.60 which are included in the "very valid" category because they are in the range of values ​​of 4,2< 5. The results of the e-module student response test at school was 4.35 which is included in the "very interesting" category because it is in the value range of 4,2< 5. So it can be concluded that the e-module based on creative thinking on colloidal material developed is feasible to be used in the learning process.

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