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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 | DOI: 10.55904/educenter.v1i3.62

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.

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 | DOI: 10.55904/educenter.v1i3.62

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.

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: 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

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

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

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

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

POTENTIAL OF HAIR TONIC SARANG BANUA (Clerodendrum fragrans) LEAF EXTRACTS AS ANTI ALOPECIA IN VIVO Ananda, Zhafira Dwika; Clarisa, Rahma; Saragih, Ruth Yohana; Hotang, Nadia Givani Br Hotang; Lestari, Gusti Ayu; Sinaga, Yesica Marcelina Romauli; Simorangkir, Murniaty
Jurnal Bioteknologi & Biosains Indonesia (JBBI) Vol. 10 No. 2 (2023)
Publisher : BRIN - Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jbbi.2023.2478

Alopecia merupakan suatu keadaan hilang atau tidak tumbuhnya rambut kepala yang dapat terjadi akibat dari penuaan, kekurangan gizi, ketidakseimbangan hormon. Hair tonic merupakan sediaan cair yang digunakan sebagai penumbuh dan penyubur rambut. Sediaan hair tonic sebagai penumbuh rambut membutuhkan antioksidan yang tinggi. Sarang banua (Clerodendrum fragrans) memiliki antioksidan yang tinggi. Riset ini bertujuan untuk mengetahui potensi hair tonic ekstrak daun sarang banua sebagai anti alopecia secara in vivo. Metode riset dilakukan secara in vivo pada tikus putih wistar (Rattus norvegicus). Penelitian ini merupakan penelitian eksperimental Rancangan Acak Lengkap (RAL) dengan 5 kelompok, K– (tanpa ekstrak), K+ (minoxidil 2%), F1 (5% ekstrak), F2 (7,5% ekstrak), dan F3 (10% ekstrak) dilakukan 3 perlakuan. Perlakuan dilakukan setiap hari dioleskan ke tikus yang mengalami stress dan kebotakan alami. Hasil uji ANOVA menunjukkan bahwa F1 (ekstrak 5%) tidak ada perbedaan signifikan dengan K+ (minoxidil 2%). Alopecia is a condition where head hair is missing or not growing which can occur as a result of aging, malnutrition, hormonal imbalance. Hair tonic is a liquid preparation that is used to grow and fertilize hair. Hair tonic preparations as hair growth require high levels of antioxidants. Sarang Banua (Clerodendrum fragrans) contains has high antioxidant. This research aims to determine the potential of hair tonic sarang banua leaf extract as an anti-alopecia in vivo. The research method is in vivo with white wistar rats (Rattus norvegicus). This research was an experimental LSD with 5 groups, K– (no extract), K+ (minoxidil 2%), F1 (5% extract), F2 (7.5% extract), and F3 (10% extract) carried out 3 treatments. The treatment is carried out every day and applied to mice that experience stress and natural baldness. The ANOVA test results showed that F1 (5% extract) had no significant difference from the K+ (2% minoxidil).

Pendampingan Kelompok Tani Manise Memanfaatkan Hama Keong Mas (Pomacea sp) Sebagai Pakan Ikan Gurame (Osphronemus gouramy) Silaban, Saronom; Rajagukguk, Juniastel; Simorangkir, Murniaty
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 4 No 2 (2021): Volume 4 Nomor 2 Tahun 2021
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v4i2.14740

The high price of chemical fish feed is a serious problem for “Tani Manise" group partners in Sari Rejo village, Medan Polonia sub-district. The reality in the field shows that the presence of golden snail (Pomace sp) in partner locations has not been utilized properly as raw material for organic feed for gurame fish (Osphronemus gouramy). The purpose of this community partnership program (PKM) activity is to assist partners in problems solving faced with the use of the golden snail as organic feed for gurame fish which has economic value and contains good nutrition. To solve the problems faced by partners, an approach is used with planning methods, training and mentoring. The results of PKM activities show that giving organic feed made from golden snail flour can accelerate the growth of gurame fish from the previous 25.0 g / month to 33.3 g / month. There is an increase in growth of about 8.3 grams per month. The high cost of feed can be reduced to 9,000 / kg using organic feed, while the chemical based fish feed is in the range of 13,000 / kg. The implementation of PKM activities can reduce high production costs, accelerate the growth of gurame fish, and the ability of partner human resources in processing raw material for golden snail pests into organic feed containing good nutrition.

Pengaruh Model Problem Based Learning Berbasis Literasi Sains terhadap Keaktifan dan Hasil Belajar Siswa pada Materi Laju Reaksi Gea, Imelda Febriani; Simorangkir, Murniaty
Reflection Journal Vol. 6 No. 1 (2026): Maret
Publisher : Lembaga Penelitian dan Pemberdayaan Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/fscmx958

Keaktifan dan hasil belajar siswa pada materi laju reaksi masih tergolong rendah yang diduga dipengaruhi oleh dominasi pembelajaran konvensional seperti ceramah, tanya jawab, dan penugasan. Penelitian ini bertujuan menganalisis pengaruh penerapan model Problem Based Learning berbasis literasi sains terhadap keaktifan serta hasil belajar siswa pada topik laju reaksi. Penelitian menggunakan pendekatan eksperimen semu dengan desain pretest-posttest control group design yang dilaksanakan di SMA Negeri 17 Medan. Sampel penelitian terdiri atas 36 siswa pada kelas eksperimen yang mengikuti pembelajaran PBL berbasis literasi sains serta 35 siswa pada kelas kontrol yang belajar melalui pembelajaran konvensional. Perlakuan diberikan selama empat pertemuan dengan alokasi waktu 2×45 menit setiap pertemuan. Hasil analisis menunjukkan bahwa rata-rata keaktifan siswa kelas eksperimen mencapai 85,38±5,71 lebih tinggi dibandingkan kelas kontrol sebesar 75,82±4,99. Nilai rata-rata hasil belajar pada kelas eksperimen meningkat dari 45,14 menjadi 84,31±5,23, sedangkan kelas kontrol meningkat dari 41,00 menjadi 76,86±6,31. Uji t satu pihak menunjukkan nilai thitung keaktifan sebesar 7,49 dan thitung hasil belajar sebesar 5,42, keduanya lebih besar daripada ttabel 1,99. Analisis N-Gain menunjukkan kategori tinggi pada kelas eksperimen (0,7) dan kategori sedang pada kelas kontrol (0,6). Uji korelasi juga menunjukkan hubungan positif antara keaktifan dan hasil belajar dengan kontribusi sebesar 48,58%. Temuan ini menegaskan efektivitas. The Effect of Scientific Literacy-Based Problem Based Learning Model on Student Activeness and Learning Outcomes on Reaction Rate Material. Student participation and learning outcomes in the topic of reaction rates remain relatively low, which is presumed to result from the dominance of conventional teaching approaches such as lectures, question–answer sessions, and assignments. This study aimed to analyze the effect of a science literacy–based Problem Based Learning (PBL) model on students’ participation and learning outcomes in reaction rate material. The study employed a quasi-experimental method with a pretest–posttest control group design conducted at SMA Negeri 17 Medan. The sample consisted of 36 students in the experimental class who were taught using the science literacy–based PBL model and 35 students in the control class who received conventional instruction. The treatment was implemented over four meetings, each lasting 2 × 45 minutes. The results indicated that the average participation score of students in the experimental class was 85.38 ± 5.71, which was higher than that of the control class at 75.82 ± 4.99. The average learning outcomes in the experimental class increased from 45.14 to 84.31 ± 5.23, while those in the control class improved from 41.00 to 76.86 ± 6.31. A one-tailed t-test showed that the calculated values for student participation (7.49) and learning outcomes (5.42) were greater than the t-table value of 1.99, indicating a significant effect. The N-Gain analysis revealed a high category for the experimental class (0.7) and a moderate category for the control class (0.6). Correlation analysis also showed a positive relationship between participation and learning outcomes with a contribution of 48.58%. These findings confirm the effectiveness of the science literacy–based PBL model in improving student participation and learning outcomes in reaction rate learning.

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