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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.
Arjuna Subject : -
Articles 193 Documents
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KEMAMPUAN PENALARAN ILMIAH SISWA SMA DALAM PEMBELAJARAN FISIKA MENGGUNAKAN MODEL INKUIRI TERBIMBING DISERTAI DIAGRAM BERPIKIR MULTIDIMENSI Fiska Anjani; Supeno Supeno; Subiki Subiki
Lantanida Journal Vol 8, No 1 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i1.6306

Abstract

Scientific reasoning is an ability to argue the concept of knowledge using scientific principles to build a deep understanding. Scientific reasoning is one of the essential skills in the 21st century as a provision in facing global challenges. Scientific reasoning is also one of the skills needed in learning physics because, in essence, physics learning requires a deep understanding of concepts. The fact shows that the scientific reasoning skills of students are still low. Students tend to solve problems without recognizing ideas and have a tendency to plug and chug as much as they remember, so learning is needed that can improve scientific reasoning skills. This scientific reasoning skill can be applied by combining guided inquiry learning models with multidimensional thinking diagram aids that are packaged in the form of student worksheets. Implementing the guided inquiry learning model will help students in the reasoning process because each process directs students to follow several methods and practices that are similar to scientists in building knowledge. Multidimensional thinking diagrams can help students in each inquiry process and assist students in analyzing and solving problems. Guided inquiry accompanied by multidimensional thinking diagrams can improve scientific reasoning skills.
PENGEMBANGAN BUKU PETUNJUK PRAKTIKUM KIMIA BERBASIS GREEN CHEMISTRY UNTUK SISWA SMA KELAS XI SEMESTER 2 Fitria Rizkiana; Herlina Apriani; Yasmine Khairunnisa
Lantanida Journal Vol 8, No 1 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i1.7180

Abstract

This study aimed to produce and test the feasibility of a laboratory guidebook based green chemistry for high school students. The type of this research was research and development using the 4-D model. The laboratory guidebook produced was assessed by two lecturers and three chemistry teachers. Data collection techniques used were nontest techniques in the form of questionnaires. The data obtained are used to analyze the feasibility of the content, presentation, language, graphics, and applicability of the green chemistry concept to the laboratory guidebook that has been produced. Analysis of the results of the assessment showed that the laboratory guidebook based green chemistry was considered to be very feasible on four aspects namely content, presentation, language and graphics, and was judged to be feasible on the applied aspects of the green chemistry concept.
IDENTIFIKASI KANDUNGAN BORAKS TERHADAP ROTI BANTAL KOMERSIL DAN TRADISIONAL DI KECAMATAN BLANG PIDIE Hardiana Hardiana; Yuni Dewi Safrida; Azmalina Adriani; Raihanaton Raihanaton; Selvia Maulidda
Lantanida Journal Vol 8, No 1 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i1.6344

Abstract

Bread is one type of food that is much in demand by the public because of its practical form and has various types of flavors, affordable prices and easy to get. To maintain bread more durable not easy to moldy and not easily damaged often added and abused preservatives such as borax. The research objective is to determine whether or not the borax content of commercial and traditional pillow bread in Blang Pidie District. The method used is qualitative with a flame test and color test using turmeric paper. The results showed that all traditional and commercial pillow breads using the flame test and color test methods of the 9 samples showed no positive results (+), meaning that none contained borax which was negative (-). Based on this study it can be concluded that, obtained in both the flame test and the color test on the content of borax on bread sold in Blang Pidie District all of the samples were negative (-) did not contain borax.
PENERAPAN MODEL PEMBELAJARAN TEAMS GAMES TOURNAMENT UNTUK MENINGKATKAN MINAT BELAJAR SISWA KELAS X IPA PADA MATERI STRUKTUR ATOM DI MAN I BANDA ACEH TAHUN PELAJARAN 2019/2020 Ruhaibah Ruhaibah
Lantanida Journal Vol 8, No 1 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i1.7334

Abstract

Research about the implementation of the learning model of teams games tournament in studying atomic structures has been carried out. The purpose of this study was to increase student interest in atomic structure by using the learning model of teams games tournament. The subjects of this study were students of Class X Science 1 at MAN 1 Banda Aceh with a total of 30 students. This research;was a classroom action research which conducted in 2 cycles.The results showed that students mastery learning increased from 56.67% at meeting 1 to 60.00% at meeting 2 in cycle I. Student learning completeness increased from 80.00% at meeting 1 to 90.00% at meeting 2 in the cycle II. Based on the results of this study note that the application of the learning model of teams games tournamentcan increase student learning interest.
ANALISIS KESALAHAN MAHASISWA DALAM MENYELESAIKAN SOAL IKATAN KIMIA Mellyzar Mellyzar; Agus Muliaman
Lantanida Journal Vol 8, No 1 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i1.6420

Abstract

Chemical bonding is an important topic in chemistry. The chemistry students have to expert on the topic. Due to the importance of chemical bonding topic, qualitative descriptive research was conducted to analyze the students' errors in solving the chemical bond problems. The participants were 38 students of the third semester of Chemistry Education Department in one of the universities in Aceh, Indonesia. The result showed that the percentage of the students’ errors in solving the chemical bonds problems was high with an average of 69.08%, it means that the students’ ability in understanding chemical bond concepts is still low. This research concludes two things. First, the types of errors in solving chemical bonds problems are the students’ error in understanding the basic concepts of chemical bonds, lack of understanding of the concept how an element has a stable electron configuration, the mechanism of the difference in the forming of ion bonds and covalent bonds, the influence of geometric figures, the resultant molecular dipole moments, the number of electronegativity to molecular pollutants, the writing of a Lewis structure for molecules and polyatomic ions, the determining of the formal contents of each atom of a Lewis molecular structure, and the drawing of the Lewis structure. Second, the causes of students’ errors have forgotten the materials and also pre-requisite materials and inaccurate in reading and solving the problems. These results need to be considered in the learning process in order to improve students’ ability in solving chemical bond problems.
NANOENKAPSULASI ASAM STEARAT DENGAN MODIFIKASI GRAFENA mG/SA WALL-CORE SEBAGAI KOMPOSIT PERUBAHAN FASA Saharman Gea; Vivi Purwandari
Lantanida Journal Vol 8, No 1 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i1.6891

Abstract

The fabrication of phase-changed composite (PCC) utilized to store thermal energy through encapsulation has been performed by utilizing the stearate acid (SA) and modified graphene (mG) with sentrimoinum bromide (CTAB). The composite was fabricated via latex method, while the liquid SA was able to be encapsulated and stabilized due to the presence of mG. The active phase of SA altered to be a thermal storing site obtained from latent heat, while the mG wall has protective features which can prevent the leakage of SA core during the transition phase. The active phase itself increased the thermal conductivity from 4.93 W/mK to 7.65 W/mK with maximum storing energy for 84.8%. The stable form of mG was measured extremely low for 2 phr with an average particle size of 13.68 nm. Thus, mG wall has excellent thermal stability and effective protection in shielding the SA core which improves the thermal properties of the composite.
ANALISIS KANDUNGAN KAFEIN PADA KOPI SEDUHAN WARUNG KOPI DI KOTA BANDA ACEH Elfa Riyanti; Ernita Silviana; Mela Santika
Lantanida Journal Vol 8, No 1 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i1.5759

Abstract

Coffee is the most popular beverage in the world after water and tea. In Acehnese society, the tradition of drinking coffee is passed down from generation to generation and has evolved into Aceh's unique cultural tradition, especially in Banda Aceh. However, behind its delicious taste, coffee drinkers need to be aware of the content of caffeine in coffee. According to SNI 01-752-2006, the limitation of caffeine consumption is 150 mg/day. The aim of the study is to measure the caffeine contents in gayo coffee and sareng coffee which brewed from coffee shops in Banda Aceh. This research was conducted at Akafarma Laboratory-Banda Aceh and at Research Laboratory Department of Chemistry FMIPA Unsyiah by using UV Vis spectrophotometry. The population in this study were Gayo coffee and Sareng coffee brewed in coffee shops in  Banda Aceh, whereas samples were taken by purposive sampling from coffee shops with the number of visitors above 200 people/day. The results showed that from ten samples of Gayo coffee that tested, two samples did not meet the SNI set requirements, namely samples 2 and 4, with the levels of each sample in one serving consecutively are 126.9 mg; 197.1 mg; 134.3 mg; 174.6 mg; 109.2 mg; 51 mg; 119.5 mg; 88.8 mg; 108.6 mg and 141.7 mg. On the contrary, in Sareng coffee, from the tests that conducted on 10 samples, the results showed that all of the samples meet SNI requirements, with the content of each sample in one serving consecutively is to 124.7 mg; 64.4 mg; 131.9 mg; 138.3 mg; 103.9 mg; 110.1 mg; 35.3 mg; 117.5 mg; 125.7 mg and 36.2 mg.
PENGEMBANGAN LKPD BERBASIS CHEMO-EDUTAINMENT (CET) PADA MATERI STOIKIOMETRI Rani Puspita Hami
Lantanida Journal Vol 9, No 1 (2021)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v9i1.8727

Abstract

The objective of this study was to create learning media in the form of Chemo-Edutainment-based worksheets on stoichiometric material and to determine the characteristics and quality of the products being developed. It used a research and development model with a 4-dimensional development model which consisted of define, design, develop, and disseminate. However, research activities are only carried out until the development stage considering the limited time for research and the unfavorable conditions of the Covid-19 pandemic. The product characteristics developed are arranged based on the CET components. The quality of CET-based student worksheets on stoichiometric material is categorized as very feasible with a coefficient (V) of 0.86 for each expert validation. The results of student responses to the CET-based student worksheets showed an average percentage of 82% with a sufficiently valid category to be used as a reference for learning resources. To measure students’ cognitive skill, it used pretest and posttest throughout the N-gain test. Then, the N-gain value of 0.83 is classified as a high category.
KARAKTERISASI SIFAT KEMAGNETAN PASIR BESI PANTAI PUNTARU KABUPATEN ALOR-NTT Martasiana Karbeka; Faryda Veronica Lamma Koly; Nini Mau Tellu
Lantanida Journal Vol 8, No 2 (2020)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v8i2.7867

Abstract

Iron sand is a source of natural magnetic material which is quite abundant. Iron sand can be useful as a magnetic source material which has the potential as a raw material for using magnetic materials. Iron sand contains non magnetic minerals which can reduce its magnetic properties. Therefore, iron sand sample preparation was carried out by washing NaOH 0,4 M and sand sample size variations. The purpose of this study was to determine the effect of washing and the size of iron sand on the magnetic properties in terms of the increase in magnetic elements. The results of research with XRF (X-Ray Fluoresence) show that iron sand with a size of 120 mesh has a magnetic content of Fe (78.07%) higher than iron sand with a size of 80 mesh with Fe content (34.63%). XRD (X-Ray Diffraction) analysis shows that washing iron sand with a size of 80 mesh gives a quarts phase (SiO2) at 2θ = 27.62° and iron sand washing with a size of 120 mesh gives the main peak magnetite phase (Fe3O4) at 2θ = 30.69° with a crystallinity of 15%. VSM (Vibrating Sample Magnetometer) analysis depicted on the hysteresis curve shows that the smaller the particle size of iron sand, the higher the magnetic properties. There are still minor oxides in iron sand as  oxide minerals.
THE FORMULATION OF PEEL-OFF MASK FROM THE ETHANOL EXTRACT OF BILIMBI LEAVES (Averrhoa blimbi L.) AS ANTI-ACNE TREATMENT Irma Zarwinda; Fauziah Fauziah; Jumirna Jumirna; Azmalina Adriani
Lantanida Journal Vol 9, No 1 (2021)
Publisher : UIN AR-RANIRY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/lj.v9i1.10206

Abstract

This research aims to formulate and assess the efficacy of the peel-off mask as an anti-acne of ethanol extract from bilimbi leaves (Averrhoa bilimbi L.).  The method used was an experiment, evaluating the extract through the inhibition test of Staphylococcus epidermis bacteria with the paper disk diffusion method. The peel-off mask formulation added the extract with a concentration of 7% (F1), 9% (F2), 11% (F3), and without using extract (F0). The Peel-off mask preparation testing includes the detection of scents, colours, irritation checks, and the determination of peel-off anti-acne mask efficacy. This study was carried out at Akafarma of Banda Aceh and the Chemistry laboratory of FKIP Unsyiah. The findings of the inhibition zone for Staphylococcus epidermis bacteria at extract concentrations of 100%, 75%, 50% and 25% were 15 mm, 12 mm, 11 mm and 10 mm, respectively. The four peel-off mask formulas were gel, homogeneous, brown, with the distinctive scent of bilimbi leaves, and did not irritate the volunteers’ skin. The average decline in acne before and after using the mask for any formula (F0, FI, FII, and FIII) was 19.64%, 22.63%, 28.75% and 50%, respectively. The peel-off mask of ethanol extract of bilimbi leaves (Averrhoa bilimbi L.) is effective as an anti-acne treatment.

Page 10 of 20 | Total Record : 193

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