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Lantanida Journal
Published by Universitas Islam Negeri Ar-Raniry Banda Aceh
ISSN : 23563133     EISSN : 25489062     DOI : -
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education
Lantanida Journal is an, scientific journal open-access containing results research, literature reviews and recent news on science and technology in the areas of educational learning and learning development. This journal is formed from the initiative of Leaders Chemistry departmen, lecturers, staff, alumni and students of Chemistry Education Department UIN Ar-Raniry Banda Aceh.
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Articles 8 Documents
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Search results for , issue "Vol 11, No 1 (2023)" : 8 Documents clear
AKTIVITAS ANTIOKSIDAN, KADAR FENOLIK, DAN KADAR FLAVONOID TOTAL DAUN JATI CINA (Senna alexandrina) Khoirul Ngibad
Lantanida Journal Vol 11, No 1 (2023)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v11i1.17426

Abstract

Free radicals are unstable molecules or chemical fragments with one or more unpaired electrons that can cause organ damage, resulting in chronic and degenerative disorders. Antioxidant substances can reduce the effects of free radicals. Chinese teak (Senna alexandrina) leaves, which include flavonoids and phenols, are one source of natural antioxidants. The purpose of this study is to extract Chinese teak leaf powder with ethanol and measure the levels of flavonoids and total phenolics. Furthermore, the antioxidant activity of an ethanol extract of Chinese teak leaves was investigated. After soaking Chinese teak leaf powder in ethanol, the filtrate is condensed using a rotary evaporator. Total phenolic and flavonoid levels are measured using UV-Vis spectrophotometry. The diphenyl-1-picrylhydrazyl (DPPH) technique is used to determine antioxidant activity. The yield of the ethanol extract of Chinese teak leaves was 3.3%, with flavonoids and total phenolics values of 7.94 mg QE/g and 7.9 mg GAE/g, respectively. Each test solution demonstrated antioxidant activity of 20, 40, 80, and 100 mg/L, with the greatest activity at 100 mg/L having a percent inhibition value of 83%.
TINJAUAN LITERATUR: BIOAKUMULASI LOGAM BERAT PADA IKAN DI PERAIRAN INDONESIA Said Ali Akbar; Hanis Kusumawati Rahayu
Lantanida Journal Vol 11, No 1 (2023)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v11i1.17834

Abstract

Heavy metals are frequently employed in a variety of industries, including industry, agriculture, food processing, and domestic appliances. Heavy metal concentrations will be extremely high in locations with residential, mining, and manufacturing activity. The concentration of heavy metals in fish reflects the state of heavy metal pollution in the ecosystem. Heavy metal accumulation in aquatic creatures' organs can occasionally exceed the level of heavy metals in their environment. The purpose of this literature review is to give information on the bioaccumulation of heavy metals in fish in Indonesian seas. 38 fish species were recorded, and literacy parameters in the form of sample locations and levels, units and types of heavy metals discovered were summarized. Pb > Cd > Hg > Cu > As > Zn > Cr > Mn > Fe is the order of metal abundance discovered. It is advised that heavy metal contamination studies be carried out in the future as part of the government's strategy for tracking down this problem.
PENETAPAN KADAR FLAVONOID TOTAL DAN AKTIVITAS ANTIOKSIDAN EKSTRAK AKAR NIPAH (Nypa fruticans Wurmb) DENGAN METODE SPEKTROFOTOMETRI UV-Vis Devi Oktaria; Mauritz Pandapotan Marpaung
Lantanida Journal Vol 11, No 1 (2023)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v11i1.16087

Abstract

Akar nipah (Nypa fruticans Wurmb) contains active chemicals in the form of flavonoids and is a component of the nipah plant with antioxidant activity. The study's goal was to determine the total flavonoid content as well as the antioxidant activity of akar nipah extract. The extraction method is a maceration method with methanol as the solvent. Total flavonoid levels in akar nipah extract were determined using UV-Vis spectrophotometry after the addition of 10% AlCl3 at a wavelength of 433 nm, while antioxidant activity was determined using the DPPH (2,2-diphenyl-1-picrylhydrazyl) technique at a wavelength of 516 nm. The total flavonoid levels and antioxidant activity were determined in comparison to quercetin. According to the study's findings, akar nipah extract contains flavonoids at 0.05 0.01% and has very strong antioxidant activity (IC50 of 6.59 ppm).
PENGEMBANGAN MODUL BERBASIS MULTIPEL REPRESENTASI SEBAGAI SUMBER BELAJAR PENDUKUNG PADA MATA KULIAH STOIKIOMETRI Chusnur Rahmi
Lantanida Journal Vol 11, No 1 (2023)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v11i1.15111

Abstract

This study is inspired by the lack of supporting learning tools in stoichiometry lectures, which causes students to struggle with the concept of the quantity of reactants and products involved in theoretical reactions and chemical calculations as a whole. To strengthen their comprehension of stoichiometric ideas at the macroscopic, submicroscopic, and symbolic levels, students require additional learning resources. The purpose of this research is to create modules based on numerous representations, exposing the amount of validity and practicability of modules as a source of student learning in stoichiometry courses. The research approach employed is R&D using the Dick & Carey development model through the steps of needs analysis, product design, validation, and evaluation. The study included two expert validators and 35 students from the Chemistry Education Study Program at UIN Ar-Raniry. Validity and practicality questionnaires were used to acquire research data. Based on the expert team's assessment, the learning module fulfilled the very valid criteria with an average assessment score of 95.17%. With a practicality score of 94.17% based on student responses, the learning module passes the criterion of being very practical. As a result, the multi-representation-based learning module may be inferred to be very valid and very practical for usage as a supporting learning resource for students in more optimal stoichiometry lectures.
DEVELOPMENT OF STUDENT WORKSHEETS BASED ON PEER LED TEAM LEARNING MODEL ON COLLOIDAL MATERIAL Zulfadli Zulfadli; Isyqa Silma; Habibati Habibati; Kana Puspita; Latifah Hanum; Rahmad Rizki Fazli
Lantanida Journal Vol 11, No 1 (2023)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v11i1.15704

Abstract

To further improve achievement of the given learning objectives, chemistry learning requires instructional materials that encourage active engagement of students. The goal of this research was to create student worksheets based on Peer Led Team Learning (PLTL) on colloid material, to establish the validity of student worksheets based on PLTL on colloid material, and assess teacher and student responses to worksheets. PLTL based students on colloid material that has been developed. This research approach is known as research and development (R&D), and it is carried out utilizing the 4D model (define, design, develop, and disseminate). Purposive sampling was used for the sample technique. The study was carried out at four schools: MAN 3, SMAN 5, SMAN 12, and SMAN 15 Adidarma Banda Aceh. Validating the practicality of student worksheets and questionnaire responses from teachers and students were used to obtain data. This study obtained the following results: (1) validation of the feasibility of student worksheets by expert validators of 92.3% and based on the chemistry teacher's assessment of 86.5% in the very good or valid category; (2) results of the teacher's responses to the students' worksheets obtained a percentage of 88.1% in the very good category; and (3) results of the students'responses to the students' worksheets obtained a percentage of 79.9% in the good category. Based on the findings, it is possible to infer that the student worksheet based on PLTL on colloid material is appropriate for use as teaching material on colloid material.
PENGEMBANGAN LEMBAR KERJA PESERTA DIDIK BERBASIS STEM UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KREATIF Mukhlis Mukhlis; Nava Hiqmatunnisaq; Barisah Barisah
Lantanida Journal Vol 11, No 1 (2023)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v11i1.15679

Abstract

The purpose of this study is to define the characteristics of STEM-based LKPD, as well as to establish the practicality of STEM-based LKPD and the growth in students' creative thinking abilities. The literature study approach was employed in this study, which was gathered from various sources such as books, journals, and articles linked to the observed research. Determine the topic, obtain information, determine research, collect data sources, prepare data presentation, and compile are the steps in this research. The findings of this research analysis in the three journals studied are visible, specifically the comparison of the development of STEM-based worksheets in improving creative thinking skills to obtain results that are very feasible to develop when compared to the development of critical thinking and scientific literacy. This is demonstrated by the 85.21% improvement in creative thinking skills acquired from STEM-based LKPD development research. Furthermore, based on the analysis of literature studies on the growth of STEM-based LKPD in enhancing creative thinking skills, it has improved year after year, with the feasibility percentage reaching 96% in 2022.
FERMENTASI MOLASE DARI TETES TEBU SEBAGAI ALTERNATIF BAHAN BAKAR TERBARUKAN Adean Mayasri
Lantanida Journal Vol 11, No 1 (2023)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v11i1.15474

Abstract

Molasses fermentation from molasses has been studied as an alternative to renewable energy. The goal of this research was to determine molasses fermentation as an alternative to renewable energy. The goal of this research was to monitor the alcohol concentration and pH levels during the fermentation process. This study employed a completely randomized design (CRD) method with two components. Factor A is the amount of time required for aeration. Molasses dilution is factor B. Factor A was tested across four different time periods: 24, 48, 72, and 96 hours. Factor B was tested using three different ratios: 1: 1.5, 1: 2, and 1: 2.5. The calculations of alcohol content FcalcP = 74.35> Ftable (11; 36; 0.05) = 2.07 and Ftable (11; 36; 0.01) = 2.79 revealed that components A and B had a significant impact on the final alcohol content. The BNJ 1% was calculated to be 0.63. This demonstrates that A4B3 is the most effective treatment. FcalcP = 2.85> Ftable (11; 36; 0.05) = 2.07 and Ftable (11; 36; 0.01) = 2.79, indicating that factors A and B have a highly substantial effect on acidity (pH). The BNJ 5% was obtained at a value of 0.61. This also demonstrates the optimal acidity conditions in A4B3 therapy. Based on these findings, it is clear that aeration for 96 hours and dilution with a 1: 2.5 ratio produce the greatest outcomes and the maximum alcohol content. At a pH of 4.45, the average bioethanol content is 6.31%.
REMOVAL OF Cd2+ IN WASTEWATER USING ZEOLITIC IMIDAZOLATE FRAMEWORK-8 (ZIF-8) AS SYNTHESIS ADSORBENT Rahmatul Fajri; Fira Asfahani; Yulida Amri; Jofrishal Jofrishal
Lantanida Journal Vol 11, No 1 (2023)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v11i1.17831

Abstract

Zeolitic Imidazole Framework-8 (ZIF-8) has been synthesized by dissolving Zn(NO3)2.4H2O and 2-MeIM into a methanol solvent and solvothermal method. The synthesized ZIF-8 will be applied as a cadmium (Cd) adsorbent in Polluted water. Several characterization methods were conducted, including XRD, FTIR, and AAS. The XRD analysis shows that the prominent characteristic peaks of ZIF-8 at an angle of 2θ = 7,25o; 10,26o; 12,57o; 16,22o; and 17,86o. At the same time, the FTIR analysis showed the presence of functional groups of Zn-N, C-N, C=N, C=C, and C-H on aromatic 2-Methyl Immidazole  as an indication that ZIF-8 has been completely established. Based on the result, the AAS method performed to analyze ZIF-8 ability to adsorb Cd in the water showed that Cd ions adsorption increased at pH 6 and 8 while decreasing at pH 7.

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