Article Per Year (5 Year)
p-Index From 2021 - 2026
3.265
P-Index
This Author published in this journals
All Journal Forum Pasca Sarjana Jurnal Pendidikan dan Pembelajaran Kimia (JPPK) JURNAL PENGABDIAN KEPADA MASYARAKAT PROSIDING SEMINAR KIMIA Chimica et Natura Acta JURNAL SAINS INDONESIA Jurnal ABDINUS : Jurnal Pengabdian Nusantara Indonesian Journal of Chemical Science and Technology KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Educenter: Jurnal Ilmiah Pendidikan Journal of Learning Improvement and Lesson Study Reflection Journal EDUCENTER JURNAL PENDIDIKAN Jurnal Bioteknologi & Biosains Indonesia
Murniaty Simorangkir
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Other

Published : 29 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 29 Documents
Search

 1   2   3 
Pengaruh penggunaan modul dalam pembelajaran kimia berbasis proyek terhadap hasil belajar siswa kelas XI semester 1 pada materi termokimia Hulu, Shella Julia Rani; Simorangkir, Murniaty
Educenter : Jurnal Ilmiah Pendidikan Vol. 1 No. 3 (2022): Educenter : Jurnal Ilmiah Pendidikan
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (300.858 KB) | DOI: 10.55904/educenter.v1i3.62

Abstract

This study aims to evaluate the impact of using modules in project-based chemistry learning on learning outcomes, learning effectiveness, and student responses to class XI thermochemistry material in semester 1. The study population involved students in class XI IPA SMA Negeri 14 Medan in the 2021/2022 academic year. The sample was selected using purposive sampling technique, with class XI MIPA 4 as the experimental class using project-based modules, and class XI MIPA 2 as the control class with conventional learning. The research instrument is a chemistry learning outcomes test on thermochemistry material with 25 multiple choice questions that have been validated and have high reliability. Data on student learning outcomes were tested using a one-sided t test. The results showed that the use of modules in project-based chemistry learning significantly improved student learning outcomes, showing better learning effectiveness compared to conventional learning. In addition, students' responses to learning with project-based modules on thermochemical materials were also positive. Thus, it is concluded that the project-based module has a positive and significant influence on student learning outcomes in thermochemistry.
Analisis RPS dan Bahan Ajar Buku Kimia Dasar Prodi Farmasi Berdasarkan Kurikulum KKNI Nurmaidasari; Nurfajriani; Murniaty Simorangkir
KATALIS: Jurnal Penelitian Kimia dan Pendidikan Kimia Vol 6 No 1 (2023): Katalis: Jurnal Penelitian Kimia dan Pendidikan Kimia
Publisher : Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/katalis.v1i6.7917

Abstract

Mata Kuliah kimia dasar merupakan mata kuliah dasar yang menjadi pengantar dan syarat mata kuliah Farmasi. Setiap mata kuliah di Universitas harus disusun Rencana pembelajaran semester (RPS) dan bahan ajar. RPS disusun sesuai dengan kurikulum KKNI dan untuk bahan ajar sesuai dengan BSNP dan prinsip KKNI. Penelitian ini dilakukan untuk mengetahui hasil analisis terhadap RPS dan bahan ajar pada mata kuliah kimia dasar Universitas Sains Cut Nyak Dhien Langsa. Metode yang digunakan adalah deskriptif kualitatif dan pengumpulan data dilakukan dengan wawancara dan observasi. Hasil yang diperoleh bahwa Prodi Farmasi Fakultas Ilmu Kesehatan sudah menggunakan kurikulum KKNI tetapi belum maksimal, hal ini ditandai dari tugas yang diberikan ke Mahasiswa belum sesuai dengan KKNI, kemudian RPS yang disusun oleh prodi memiliki skor mutu dua, berada pada kategori baik dan perlu dilakukan revisi pada beberapa hal agar sesuai dengan kurikulum KKNI. Bahan ajar kimia dasar yang digunakan adalah buku referensi kimia dasar konsep-konsep inti karangan Raymond Chang Edisi ketiga jilid dua dan hasil validasinya sesuai standar BSNP berada pada skor rata-rata 3,6. Hal ini menunjukkan bahwa buku referensi yang digunakan sudah valid dan layak digunakan sebagai bahan ajar dan sesuai dengan KKNI.
Analysis of Science Literacy of XI Class Students In Buffer Solution Materials Yudha, Sandy; Simorangkir, Murniaty; Nurfajriani, Nurfajriani
Journal of Learning Improvement and Lesson Study Vol. 3 No. 2 (2023): JLILS (December Edition)
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jlils.v3i2.46

Abstract

The background of this research is that the world of education is currently intensively developing scientific literacy skills for students. This condition is the result of the rapid development of science and technology (IPTEK), so students must be able to act wisely and be able to adapt to science, environment, society, and technology. The purpose of this study was to determine the level of scientific literacy in nominal, functional, conceptual, and multidimensional aspects of class XI students on buffer solution material at State Senior High School (SMAN) 1 Binjai, Langkat Regency. This research method is a survey research, using a cross-sectional survey design. The sample in this study was taken from class XI IPA 1, totaling 30 people based on a purposive sampling technique. The research instrument used was a scientific literacy test in the form of essay questions, with indicators of scientific literacy referring to the theoretical framework. Based on the results of data analysis, it was found that the average value of students' scientific literacy abilities, nominal literacy indicators were 83.33%, functional indicators were 57.67%, conceptual indicators were 59.07%, and multidimensional indicators were 28.49%.
Differences in Learning Outcomes and Critical Thinking Ability of Students Taught Using Learning Video Media and PowerPoint with Problem Based Learning Model on Reaction Rate Material Harahap, Syntia Wulandari; Simorangkir, Murniaty
Jurnal Pendidikan dan Pembelajaran Kimia Vol 13, No 1 (2024): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Differences in Learning Outcomes and Critical Thinking Ability of Students Taught Using Learning Video Media and PowerPoint with Problem Based Learning Model on Reaction Rate Material. This study aims to determine the differences in learning outcomes and critical thinking Ability of students as well as the correlation between critical thinking Ability and learning outcomes of students taught using learning video media and powerpoint with problem-based learning models on reaction rate material. This research method is true experiment. The population of this study were all students of class XI IPA SMA Negeri 1 Lubuk Pakam and the sample was class XI J as the first experimental class taught with learning video media and class XI K as the second experimental class taught with powerpoint media taken using random sampling technique. The results showed that there were differences in learning outcomes and critical thinking Ability of students taught using learning video media and PowerPoint with problem-based learning models on reaction rate material. The average learning outcome of experimental class I was 89.67 and experimental class II was 85.33. The critical thinking ability of experimental class I was 77.67 and experimental class II was 69.87. There is a correlation between critical thinking Ability and student learning outcomes taught using learning videos of 0.837 with a very high category and using powerpoint of 0.796 with a high category. Keywords: Problem based Learning, Learning Video, Powepoint, Learning Outcomes, Critical Thinking AbilityDOI: 10.23960/jppk.v13.i1.2024.04
Effect of Chain Length on Fatty Alcohol Sulfation using SO3-DMF Sitinjak, Elvri Melliaty; Masmur, Indra; Tarigan, Dedi; Anggini, Cindy; Simbolon, Emma Juli Anamasta; Simatupang, Endang; Pane, Yulia Ratu; Simorangkir, Murniaty; Nurfajriani, Nurfajriani
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.49376

Abstract

The fatty alcohols C8, C10, C16 and C18 were used as raw materials for the sulfation reaction using the SO3-DMF complex to study the ratio of carbon chains. The first step is to prepare the SO3-DMF complex, by reacting SO3 gas into DMF at a temperature of 0-4 0C with a reaction time of 3 hours, then sulfation is carried out at 100 0C for 5 hours on C8, C10, C16 and C18. Tests were carried out on the results of sulfation with an FT-IR Spectrophotometer. Surface tension, foam stability and yield calculations. From the sulfation results, the yield results were respectively 83%, 81%, 68% and 61% then the results from the surface tension analysis were 35.3, dyne/cm, 30.3 dyne/cm, 29.4 dyne/cm and 33.6 dyne/cm and foam stability analysis of 0.2 cm, 0.8 cm, 0.7 cm and 1 cm. Based on the surface tension reduction value, palmityl alcohol is the best raw material for making surfactants.
Synthesis of Sodium Myristyl Sulfate with Myristyl Alcohol Sulfation using SO3-DMF Sitinjak, Elvri Melliaty; Masmur, Indra; Tarigan, Dedi; Anggini, Cindy; Simbolon, Emma Juli Anamasta; Simatupang, Endang; Pane, Yulia Ratu; Simorangkir, Murniaty; Nurfajriani, Nurfajriani
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.49378

Abstract

The sulfation reaction between myristyl alcohol and the SO3-DMF complex has been successfully carried out to produce sodium myristyl sulfate. Formation of the SO3-DMF complex by reacting DMF and SO3 gas obtained from the reaction of phosphorus pentaoxide and H2SO4. The variables studied were the time of formation of the complex, the time and temperature of sulfation and the concentration of NaOH at neutralization. The results of myristyl alcohol sulfation with SO3-DMF were tested by FTIR spectroscopic analysis, surface tension test, and foam stability test. The formation time of the SO3- DMF complex of 5 hours is the result of the highest surface tension reduction and the most optimal foam stability. The results of the foam stability test analysis showed the highest value at 80oC with a foam stability of 0.5 cm. The best result of sulfation neutralized with 40% NaOH solution was able to reduce the surface tension value and has foam stability up to 66% with a decrease in foam height of 0.3 cm
Differences in Learning Outcomes and Critical Thinking Skills of Students Taught with Discovery Learning Model and Probleam Based Learning Assisted with Powerpoint Media on Acid-Base Material Sitompul, De Enovani; Simorangkir, Murniaty
Jurnal Pendidikan dan Pembelajaran Kimia Vol 13, No 2 (2024): Jurnal Pendidikan dan Pembelajaran Kimia
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract: Differences in Learning Outcomes and Critical Thinking Skills of Students Taught with Discovery Learning Model and Probleam Based Learning Assisted by Powerpoint Media on Acid-Base Material. This study aims to examine the learning outcomes and critical thinking skills of students instructed in problem-based learning with PowerPoint presentations on acid-base topic versus the discovery learning model. We refer to this type of research as a quasi-experiment. Every pupil in class XI IPA SMA S Markus Medan and samples from classes The study's population consisted of XI IPA 1 and XI IPA 2, who were selected using total sampling. The study's conclusions showed that students' learning outcomes and ways of thinking differed depending on whether they were taught using DL or PBL approaches. In the first experimental class, students' average learning result was 80.00, while the average for individuals in experimental class II was 76.56. The students in the Experiment I class (79.88) and the Experiment II class (76.63) are then shown for their mean critical thinking scores. The correlation test between learning results and critical thinking abilities among students taught using the DL model is 0.667, whereas students taught using the PBL paradigm has a 0.365 correlation test.Keywords: Discovery Learning, PowerPoint, learning outcomes, problem-based learning, and critical thinking skills.DOI: 10.23960/jppk.30025
Antioxidant activity of local Gompang Batu Plants (Lobelia nummularia Lam) in vitro DPPH Method Ester Basani Panggabean; Murniaty Simorangkir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68702

Abstract

Free radicals are reactive atoms or molecules because they contain unpaired electrons that easily attack body structures, causing various diseases such as cancer, liver, heart and other degenerative diseases. Antioxidants are compounds or molecules that can reduce free radicals. Natural antioxidants are needed to reduce the effects of using synthetic antioxidants. The local plant gompang batu (Lobelia nummularia Lam) is found in Ruhut Bosi Village, Pangaribuan District and has been used by the community as a traditional medicine. This study aims to determine the content of secondary metabolites and antioxidant activity of ethanol extract of gompang batu in vitro using the DPPH (2,2 diphenyl-1-picrylhydrazyl) method. The results of the phytochemical screening test of the gompang batu plant contain secondary metabolites of flavonoids, alkaloids, steroids/terpenoids and saponins. The results of the antioxidant activity test of the ethanol extract of gompang batu obtained an IC50 value of 135,095 ppm (moderate category) and an IC50 value of vitamin C (as a positive control) of 39,390 ppm.
Toxicity of Gompang Batu Plant Extract (Lobelia nummularia Lam) with BSLT (Brine Shrimp Lethality Test) Method as Raw Material for Medicine Agnes Normawati Silaban; Murniaty Simorangkir
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68704

Abstract

Gompang Batu is a traditional medicinal plant found in Pangaribuan, North Tapanuli, Sumatra, Indonesia. Identification confirmed that gompang batu is Lobelia nummularia Lam from the Campanulaceae family. This study aims to determine the toxicity and phytochemical content of three types of gompang batu extracts. The Brine Shrimp Lethality Test (BSLT) method.was used for toxicity testing. Extraction was conducted through maceration using n-hexane, ethyl acetate, and ethanol solvents. LC50 values were 18.05 µg/mL for ethanol extract (very toxic), 27.59 µg/mL for ethyl acetate extract (very toxic), and 51.34 µg/mL for n-hexane extract (toxic). Phytochemical analysis showed that the ethanol extract contains abundant alkaloids, flavonoids, saponins, terpenoids and tannins. Ethyl acetate extract contains alkaloids, steroids, flavonoids, saponins, and tannins moderate tannins. N-hexane extract contains steroids and a small amount tannins. L. nummularia extract is classified as toxic and show potential as a medicinal raw material.
Antibacterial Potential of Gompang Batu Plant Extract (Lobelia nummularia Lam) Against Skin Disorder-Causing Bacteria Syazwana Izni; Murniaty Simorangkir; Yesica Marcelina Romauli Sinaga
Indonesian Journal of Chemical Science and Technology (IJCST) Vol. 8 No. 2 (2025): JULY 2025
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v8i2.68705

Abstract

Skin disorders are common health problems that are often caused by bacterial infections such asStaphylococcus epidermis and Propionibacterium acnes. This study aims to analyze the antibacterialpotential of n-hexane, ethyl acetate, and ethanol extracts of gompang batu (Lobelia nummularia Lam)plants against bacteria that cause skin disorders. Extraction was carried out by maceration withsolvents of varying polarity. Antibacterial tests were carried out using the disc diffusion andmicrodilution methods with six treatments (chloramphenicol, DMSO, 1.25%; 2.5%; 5% and 10%extract). The results showed that the ethanol extract with a concentration of 10% had the most effectiveantibacterial activity with an inhibition zone of 14.0 mm (P. acnes bacteria) and 13.8 mm (S. epidermisbacteria). The MIC value of the extract ranged from 156.25 to 625 µg/mL and the MBC value of allextracts> 2500 µg/mL indicated bactericidal properties. Gompang batu has the potential as a naturalantibacterial for skin infections. N-hexane extract contains steroids and tannins; ethyl acetate containsalkaloids, flavonoids, steroids and tannins; ethanol contains alkaloids, flavonoids, terpenoids and tannins.
Co-Authors Agnes Normawati Silaban Aisjah Girindra Ananda, Zhafira Dwika Anggini, Cindy Anna Juniar Clarisa, Rahma Ester Basani Panggabean Fachriyan H. Pasaribu Freddy Tua Musa Panggabean Gea, Imelda Febriani Harahap, Syntia Wulandari Hotang, Nadia Givani Br Hotang Hulu, Shella Julia Rani Idramsa Idramsa IMAN PERMANA MAKSUM Indra Masmur Juniastel Rajagukguk, Juniastel KHOMAINI HASAN Lestari, Gusti Ayu Nurfajriani Nurfajriani Nurfajriani Nurfajriani, Nurfajriani Nurmaidasari Pane, Yulia Ratu Partomuan Simanjuntak Partomuan Simanjuntak Ratih Baiduri Ribu Surbakti Ribu Surbakti, Ribu riwayati riwayati RR. Ella Evrita Hestiandari Sajaratud Dur Saragih, Ruth Yohana SARONOM SILABAN Simatupang, Endang Simbolon, Emma Juli Anamasta Siti Khodijah Dalimunthe Sitinjak, Elvri Melliaty Sitompul, De Enovani Syazwana Izni Tarigan, Dedi Tonel Barus Tonel Barus, Tonel Toto Subroto Wasmen Manalu Yesica Marcelina Romauli Sinaga Yudha, Sandy