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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 13 Documents
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Search results for , issue "Vol. 8 No. 2 (2024): Alotrop 2024" : 13 Documents clear
SYSTEMATIC LITERATURE REVIEW OF TRENDS AND DEVELOPMENT IN ANTIHYPERTENSIVE EFFECT OF SEAWEED RESEARCH: SCIENTOMETRIC ANALYSIS Mohamad Gazali; Yosie Andriani; Jasnizat Saidin; Noraznawati Ismail
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.v8i2.36875

Abstract

Hypertension is the most alarming disease that causes cardiovascular risk for human health Worldwide. Thus, the author has explored marine natural marine macroalgae that possess antihypertension activity to lower blood pressure. Marine macroalgae or seaweed tropical marine organisms from marine biodiversity that are distributed widely in the subtropic and tropical oceans. Marine macroalgae have a significant role in preventing hypertension risk with a unique biochemical compound that is not contained in a terrestrial plant. However, antihypertension of seaweed research using scientometric analysis is limited. This study collected scientific information from relevant literature to determine the recent development and trends regarding antihypertension of seaweed research Worldwide. Many researchers, academia, and practitioners will have a wide understanding of the recent novelty finding in seaweed prospect to prevent antihypertension disease with a scientometric analysis approach to interpret data using CiteSpace. The literature review using scientometric analysis regarding antihypertension of seaweed research from 1991 until 2022. The result showed Suetsuna K is the most influential author (sigma score =1.52, centrality score =0.24 and degree score =51). Advances in Food and Nutrition Research is the leading journal. The most popular keywords in common cluster related antihypertension of seaweed research area are seaweed, hypertension, algae, in vitro, and dietary fiber. On the other hand, various stakeholders need to know the development and trends of a marine drug for antihypertensive effect from various seaweeds or marine macroalgae.
PEMBUATAN FILM BIOPLASTIK NANOKRISTAL SELULOSA PELEPAH NIPAH (Nypa Fruticans) YANG DIHASILKAN DARI PROSES SONIKASI-HIDROTERMAL DENGAN PENAMBAHAN PATI SAGU Kasrawati; Supran Hidayat Sihotang
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.v8i2.37318

Abstract

The manufacture of palm leaf frond (Nypa fruticans) nanocrystalline bioplastic films produced from a sonication-hydrothermal process with the addition of sago starch. This research aims to determine the characteristics of bioplastics made from cellulose nanocrystals with the addition of sago starch. Characterization uses tensile test methods, water absorption, FTIR, XRD, TGA, and biodegradability tests. The highest tensile strength results for bioplastics were shown in samples with a 20% NCC film variation, namely 11.996 MPa, elongation 1.66%, and Young's modulus 722.65 MPa. The best water absorption test is found in the 20% NCC variation, namely 24.35%. FTIR spectrum analysis shows the absorption of the C-O-C group at a wave number of 1096 cm-1 which identifies the presence of glycosidic bonds in cellulose nanocrystals. Peak 3428 indicates the presence of an O-H group and peak 2926 cm-1 indicates the presence of a C-H group. XRD analysis shows the degree of crystallinity of cellulose nanocrystals, namely 90%. The 15% NCC variation shows good heat stability around 335.71oC and the 20% NCC variation is 327.91%. The best biodegradability test was shown by samples with an NCC variation of 15%, namely 71.68%. The conclusion in this research is that the best sample variations are NCC variations of 20% and 15%.
ANALYSIS OF THE RELATIONSHIP OF INVENTIVE THINKING AND SCIENCE-RELATED ATTITUDE Eka Ad'hiya; Maefa Eka Haryani; Rodi Edi; Diah Kartika Sari; Nadila Nur Savitri
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.v8i2.37518

Abstract

This study aims to analyze the relationship between inventive thinking (IT) and science-related attitude (SRA). This study is a quantitative study with a cross-sectional study design. Participants in this study were 109 chemistry education students, Sriwijaya University. The instruments used in this study were an adaptation of the inventive thinking measurement instrument and an adaptation of the science-related attitude (TOSRA) measurement instrument. Data analysis was carried out using Rasch Analysis to determine the validity and reliability of the instrument, as well as to measure inventive thinking and science-related attitude, which was then analyzed using Pearson correlation analysis. The results of the validity analysis showed that the MNSQ Outfit of both instruments (IT = 1.01 and SRA = 1) was in the range of 0.5-1.5 which was classified as valid or could measure what was to be measured well. The reliability of both instruments (IT = 0.98 and SRA = 0.99) was in the range> 0.94 which was classified as special. The results of the analysis of the relationship between inventive thinking and science-related attitude show that r = 0.273 is included in the low category. This shows that the relationship between science-related students and inventive thinking is low, or in other words there is no close relationship between inventive thinking ability and science-related students. The results of the Pearson correlation analysis also show a positive sign. This shows that the relationship between inventive thinking and science-related students is also positive, or not contradictory.
KAJIAN LITERATUR MODEL PEMBELAJARAN DALAM MENINGKATKAN KETERAMPILAN METAKOGNITIF PADA PEMBELAJARAN KIMIA Arjuna Pramana; Firnanda Zuni Fransiska; Erlin Dwi Nurrohimi; Sukmawati; Muhammad Ridwansyah; Agung Rahmadani
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.v8i2.37599

Abstract

The world of education until now continues to develop but there is still a problem, namely the low learning outcomes of students. One of the factors that can cause this problem is that students do not have the ability to evaluate and regulate their cognitive processes in solving a problem in learning. Until now, teachers have tried to improve students learning outcomes through empowering metacognitive skills. The components that learners must have in learning are skills to process thinking including planning (regulation), monitoring the learning process (monitoring) and reflecting (evaluation). These components can be seen in the learning skills and learning process of learners. This literature review explores more deeply about learning models that are suitable for improving metacognitive skills in chemistry learning. The literature review uses narrative literature review type to identify learning models that can improve metacognitive skills in chemistry learning. Cooperative learning models have a great influence in improving metacognitive skills, cooperative learning models that can be used include problem-based learning, guided inquiry, problem solving, project-based learning, and self regulated learning.
PENERAPAN FLIPBOOK MODUL PEMBELAJARAN DENGAN PENDEKATAN STEAM UNTUK MENINGKATKAN SIKAP ILMIAH MAHASISWA Firdiawan Ekaputra; Fuldiaratman; Wilda Syahri
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.v8i2.37741

Abstract

This study aims to improve students' scientific attitudes through the application of learning module flipbooks with the STEAM approach. This study used a pre-experiment design with one research sample class. The sample students were Jambi University students in the Chemistry Education Study Program who took the philosophy of education course. In this study, a questionnaire instrument was used to collect scientific attitude data. The difference in student scientific attitude data before and after the application of the learning module flipbook with the STEAM approach Furthermore, the paired sample t-test test was conducted to determine the impact of the application of the learning module flipbook with the STEAM approach to the scientific attitude of students. scientific attitude of students. The significance results based on the paired sample t-test shows 0.000. Based on these results, it can be concluded that the application of the learning module flipbook with the STEAM approach can improve students' scientific attitudes. improve students' scientific attitudes.
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.

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