Article Per Year (5 Year)
p-Index From 2020 - 2025
6.366
P-Index
This Author published in this journals
All Journal JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Pendidikan Kimia Indonesia EDUSAINS Journal of Education and Learning (EduLearn) Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan SEMIRATA 2015 EduChemia: Jurnal Kimia dan Pendidikan CHEMPUBLISH JOURNAL Jurnal Pendidikan Kimia Universitas Riau Jurnal Tadris Kimiya AL ISHLAH Jurnal Pendidikan Jurnal Penelitian Sains Journal of Natural Science and Integration Indonesian Journal of Chemistry Jurnal Manajemen Pendidikan Penelitian Kualitatif Jurnal PAJAR (Pendidikan dan Pengajaran) Martabe : Jurnal Pengabdian Kepada Masyarakat Community Development Journal: Jurnal Pengabdian Masyarakat Eduproxima : Jurnal Ilmiah Pendidikan IPA International Journal of STEM Education for Sustainability Jurnal Pijar MIPA Journal of Educational Sciences JOURNAL OF CHEMICAL NATURAL RESOURCES (JCNaR) Research and Development in Education (RaDEn) Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) Indonesian Journal of Education and Development Research Proceeding Seminar Nasional IPA
Lenny Anwar
Chemistry Education Master’s Study Program, Faculty Of Teacher Training And Education, Universitas Riau, Pekanbaru
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Health Professions Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

Published : 57 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 57 Documents
Search

 1   2   3   4   5 
Development of Students Worksheet Chemical Bond Based On Learning Cycle 7E Utari Oktavianti; Asmadi M. Noer; Lenny Anwar S
EduChemia (Jurnal Kimia dan Pendidikan) Vol 5, No 1 (2020)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.456 KB) | DOI: 10.30870/educhemia.v5i1.6732

Abstract

This development research aims to produce worksheet chemical bonds based on Learning Cycle 7E,  to know the validity level of the worksheet according to the validators, to know the practicality level of the worksheet according to the teacher, and to know the attractiveness level of the worksheet according to students. The development model follows the plomp model. Plomp consists of the preliminary investigation phase, the design phase, realization or construction phase, the test phase, evaluation and revision, and the implementation phase. Based on the results of product validation by three validators, the results obtained with the category valid from five aspects, namely the feasibility of the content, Learning Cycle 7E characteristics, language, presentation, and graphics with the percentage of 91.67%, 92.71%, 94.44%, 91.66%, and 88.89%. Teachers 'response as worksheet users based on the Learning Cycle 7E category is very practical with a percentage of 88.15%, and students' responses to worksheet based on the Learning Cycle 7E category are very interesting with a percentage of 89.99%.
POTENSI TUMBUHAN AKAR TAPAK KUDA (BAUHINIA HULLETTII PRAIN) SEBAGAI SUMBER SENYAWA ANTIOKSIDAN Lenny Anwar; Jhon Azmi; Herdini Herdini
CHEMPUBLISH JOURNAL Vol. 1 No. 1 (2016): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.417 KB)

Abstract

Akar tapak kuda (Bauhinia hullettii Prain) merupakan tumbuhan  dari genus Bauhinia yang banyak dijumpai di Indonesia. Tumbuhan Bauhinia dilaporkan kaya akan senyawa flavonoid dan stilbenoid. Dua senyawa flavanon (1 dan 2) dan senyawa fenolik (3) terdapat pada kulit batang dan daun akar tapak kuda.Uji aktivitas antioksidan dari tiga senyawa terhadap radikal DPPH menunjukkan aktifitas antioksidan yang sangat kuat untuk senyawa 1 (5,7,3’,5’-tetrahidroksi flavanon)  dan  3 (asam 3,4,5-trihidroksibenzoat).  Senyawa 2 (5,7,4’-trihidroksi-6-metilflavanon) tidak aktif sebagai antioksidan dengan IC50>1000 µg/mL. Senyawa 1 dan 3 diketahui lebih aktif daripada Vitamin C dengan IC50 masing-masing 6,33 dan 1,26 µg/mL. Kata Kunci: Bauhinia hullettiiPrain, flavonoid, fenolik, aktivitas antioksidan
Potensi metabolit sekunder produksi bakteri endofit dari tumbuhan laban (Vitex pubescens Vahl) sebagai antikanker Lenny Anwar; Dedi Futra
CHEMPUBLISH JOURNAL Vol. 4 No. 2 (2019): Chempublish Journal
Publisher : Universitas Jambi, Fakultas Sains dan Teknologi, Program Studi Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/chp.v4i2.7937

Abstract

Peran mikroba endofit dalam memproduksi metabolit sekunder dengan kualitas yang hampir sama dengan tanaman aslinya sangat potensial untuk dikembangkan. Penelitian ini bertujuan untuk menyelidiki bakteri endofit yang terdapat didalam jaringan kulit batang Laban (Vitex pubescens Vahl) serta kemampuannya untuk memproduksi metabolit bioaktif yang mempunyai aktivitas sitotoksik. Dalam penelitian ini digunakan teknik inokulasi langsung dengan jalan meletakkan sampel tanaman di atas permukaan Nutrient Agar (NA). Metoda Micro tetrazolium (MTT) digunakan untuk menetapkan aktivitas sitotoksik dari ekstrak etilasetat. Bakteri endofit yang berhasil diisolasi sebanyak 3 isolat yaitu Bakteri-2A, Bakteri -3B dan Bakteri-6C. Berdasarkan hasil penapisan dari 3 isolat tersebut didapatkan dua bakteri yang memiliki aktivitas potensial yang baik terhadap sel serviks (HeLa) yaitu isolat Bakteri – 6C (IC50 = 82.54 µg/mL) dan Bakteri-2A (IC50 = 297.09 µg/mL). Isolat yang menunjukkan aktivitas sitotoksik terbesar adalah isolat Bakteri-6C sehingga dapat disimpulkan bahwa isolat tersebut merupakan isolat yang paling potensial sebagai penghasil senyawa antikanker.
PENERAPAN MODEL PEMBELAJARAN OSBORN UNTUK MENINGKATKAN HASIL BELAJAR PESERTA DIDIK PADA POKOK BAHASAN REAKSI REDUKSI DAN OKSIDASI Devi Susmalia; Betty Holiwarni; Lenny Anwar
Jurnal Pendidikan Kimia Universitas Riau Vol 6, No 2 (2021)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan (FKIP), Universitas Riau (UNRI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33578/jpk-unri.v6i2.7791

Abstract

Penelitian ini bertujuan untuk mengetahui peranan model pembelajaran Osborn dalam meningkatkan hasil belajar peserta didik pada pokok bahasan reaksi reduksi dan oksidasi di kelas X MIPA SMAN 10 Pekanbaru. Bentuk penelitian ini adalah eksperimen serta rancangan penelitian randomized control group pretest-posttest. Sampel penelitian ini kelas X MIPA 1 sebagai kelas eksperimen dan kelas X MIPA 3 sebagai kelas kontrol. Kedua kelas dilakukan uji normalitas menggunakan uji Liliefors dan diuji homogenitas menggunakan uji kesamaan dua rata-rata. Kelas eksperimen diberi perlakuan dengan penerapan model pembelajaran Osborn sedangkan kelas kontrol tanpa penerapan Osborn. Teknik analisis data yang digunakan adalah uji-t pihak kanan. berdasarkan uji analisis data diperoleh thitung > ttabel yaitu 2,30 >1,67, artinya penerapan model pembelajaran Osborn dapat meningkatkan hasil belajar peserta didik pada pokok bahasan hidrokarbon di kelas X MIPA SMA Negeri 10 Pekanbaru.
PENERAPAN MODEL PEMBELAJARAN NOVICK UNTUK MENCAPAI KETUNTASAN BELAJAR PESERTA DIDIK PADA MATERI LARUTAN PENYANGGA Lisda Aprianti; Sri Haryati; Lenny Anwar
Jurnal Pendidikan Kimia Universitas Riau Vol 5, No 2 (2020)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan (FKIP), Universitas Riau (UNRI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33578/jpk-unri.v5i2.7618

Abstract

The implementation of Novick learning model has been implemented in class XI MIA SMAN 1 Kampar Timur. Ther purpose of this study is to achieve student’s mastery learning on the subject of buffer solution. The type of this research is pra-experiment research with one-shot study case design. The research data were collected from 27 March to 25 April 2019. The population in the research were class XI MIA SMAN 1 Kampar Timur. The samples were selected from the three existing classes, namely class XI MIA 4. Data analysis technique used is to calculate presentation of classical mastery learning. Based on the researth results were obtained by classical learning completeness of 77.78 % and classical indicator completeness was 80 %. This means that the application of the Novick learning model can achieve student learning completeness in the material buffer solution in class XI MIA SMA Negeri 1 Kampar Timur.
PENGEMBANGAN E-LEARNING BERBASIS SCHOOLOGY PADA MATERI KESETIMBANGAN ION DAN pH LARUTAN PENYANGGA KELAS XI SMA/MA Roza Linda; Suci Sukma; Lenny Anwar
Jurnal Tadris Kimiya Vol 6, No 2 (2021)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v6i2.10352

Abstract

This study aims to develop a Schoology-based e-learning media and to find out the validity and response of users (teachers and students). The method used in this research was Research and Development (R&D) with the Analysis, Design, Development, Implementation, and Evaluation (ADDIE) model. The implementation stage was not carried out due to the limitations of the research. Validation tests carried out by material and media experts as well as limited trials on students and teachers were obtained using a questionnaire. The data analysis technique used was descriptive analysis. The validation results from material and media expert showed the percentage of 93.23% and 90.69% in the valid category. The results of trial by student and teacher responses showed the percentage of 94.40% and 93.12% in good category. The Schoology-based e-learning media on ion equilibrium and buffer solutions is valid and suitable for use in online learning. 
Development of Interactive E-Module on Oxidation-Reduction Concept Rabiatul Adawiyah; Susilawati Susilawati; Lenny Anwar S
Jurnal Tadris Kimiya Vol 6, No 2 (2021)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v6i2.10288

Abstract

This research aims to develop an interactive e-module on redox concept. Research and Development (R&D) method was used in this study with a Plomp model. This model included three phases: preliminary, prototype or development, and assessment. Validation sheets and response questionnaires were used as research instruments. Six expert lecturers, consisting of three media and materials experts each, assessed the validity sheets. A small-scale test was carried out utilizing two approaches; a one-to-one test and a small group test. A one-to-one test was given to three students who had high, medium, and low abilities; while the small group test was conducted on three teachers and 30 students from three different schools, which are MAN 2 Pekanbaru, MAN 1 Pekanbaru, and SMA IT Al-fitiyah. The results showed that the interactive e-module was very valid and could be used in learning activities. This is indicated by the percentage of validation from material experts 89.27% and media experts 88.76%. In a small-scale trial for a one-on-one test, the teacher's response 95.83% with very practical criteria; and student response test 87.73% with interesting criteria.
The Effectiveness of KAPRA Learning Model on Buffer Solution to improve Students' Critical Thinking Skills Maria Erna; Lenny Anwar; Durriah Durriah
Jurnal Tadris Kimiya Vol 6, No 1 (2021)
Publisher : Department of Chemistry Education, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/jtk.v6i1.8378

Abstract

This study analyzes the effectiveness of the KAPRA learning model (associate, experience, think, negotiate, and apply) students' critical thinking skills on buffer solutions. The subjects of this research are students of class XI MIPA 3 as the experimental and class XI MIPA 4 as the control class at SMAN 10 Pekanbaru. The method uses experimental research with a randomized control group pretest-posttest research design. The data obtained were analyzed using normality test, homogeneity test, hypothesis testing and N-Gain test. The results showed that the KAPRA learning model effectively increased students' critical thinking skills. Based on the hypothesis test, tcount > ttable (5.89 > 1.66) with the N-Gain value in the moderate category of 0.52.
PENERAPAN MODEL PEMBELAJARAN KOOPERATIF BERMAIN JAWABAN UNTUK MENINGKATKAN PRESTASI BELAJAR SISWA PADA POKOK BAHASAN TATA NAMA SENYAWA DAN PERSAMAAN REAKSI DI KELAS X SMA NEGERI 10 PEKANBARU Fitria Apriona; Elva Yasmi Amran; Lenny Anwar
Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan

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

Abstract

Abstract: The Research about application ofcooperative learning modelbermain jawabanhas beendonetoimprove student’s achievementon the topic ofnomenclature of compounds and chemical equations at 10th of SMA Negeri 10 Pekanbaru November 2013. This research is experimental research based on pretest-posttest design. The sample consisted of two classes, X.7classas control classandX.5classas experiment class that randomly selected after testing homogeneity. Cooperative learning model bermain jawaban applied in X.5. Analysis of data used t-test. Results of data processing obtainedtcount>ttable (4,04> 1,66). It means that the application of cooperative learning model bermain jawaban can improve student’s achievement on the topic of nomenclature of compounds and chemical equations at10th of SMA Negeri 10 Pekanbaru. The improvement of student’s achievement in experiment class was supported by N-Gain score 0,79 that included in high category.Keyword :Cooperative Learning, Bermain Jawaban, Nomenclature of Compounds and Chemical Equations
SENYAWA FLAVONOID DARI EKSTRAK ETIL ASETAT KULIT BATANG TUMBUHAN Bauhinia hullettii Prain DAN UJI IN VITRO SEL MURINE LEUKEMIA P-388 Feri Ari Bangun Siahaan; Johni Azmi; Lenny Anwar
Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Keguruan dan Ilmu Pendidikan

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

Abstract

Isolation, characterization, and in vitro testing against murine leukemia P-388 cell of flavonoid compounds from Bauhinia hullettii Prain stem bark have beenperformed. Isolation was carried out by extraction and fractionation. Extraction usedmeceration method at room temperature to obtain n-Heksana extract, dicloromethaneextract, and etil acetate extract. Based on phytochemical testing, etil acetate extractcontain flavonoid compounds. Extraxct etil acetate was fractionated by vacumcolumn chromatography, gravitation column chromatography, and flash columnchromatography. The fractionation resulted yellow crystal that having melting pointof 188oC - 189oC. The in vitro testing against murine leukimia P-388 cell of isolatedflavonoid compounds show “medium” activity with IC50 = 22,5 μg/ml.Key word : Bauhinia hullettii Prain, Flavonoid, Murine Leukemia P-388 Cell
Co-Authors Abdullah Abdullah Achmad Ilham Adisman, Rendika Agustini Agustini Alimin, Masnaini Amelian, Wulan Amlen Sutrisno Anggi Kusumasari Ariria, Amna Asmadi M. Noer Asmadi M. Noer Asmadi M. Noer Athallah, Naura Lulu Nadhifa Bella Listriani Putri Bella Pratiwi* Besse Wahdatillah Betty Holiwarni Dedi Futra Devi Susmalia Durriah Durriah Elfita Eliza Eliza Elva Yasmi Amran Emir Fikri Era Novitasari Erviyenni Erviyenni, Erviyenni Evi Suryawati F. Khoirunnisa Gultom Ferdian, Nindya Cika Feri Ari Bangun Siahaan Ferlinahayati Ferlinahayati Fitri Aldresti Fitria Apriona Fitria Sari Fitrya . Fitrya Fitrya Friska Nitasari H Herdini Helmy Hidayat Helmy Hidayat, Helmy Jhon Azmi Jhon Azmi, Jhon Jimmi Copriady Jimmi Copriady Johni Azmi Linawati Linawati Linda*, Roza Lisda Aprianti M. Rahmad M.Noer, Asmadi Mardeni*, Putri Rizca Maria Erna Maria Erna Maria Erna Kustyawati Masdalena Sinaga Mawaddah Ayusni Mazidah Mazidah Mega Syahirah Muharni Muharni Muharni Muharni Nadila, Khori Dea Nelda Nelda Nelly Erlina Nelly Nurhayati Nursiwan, Wimbi Apriwanda Pratiwi, Yezsica Putri Adita Wulandari Putri, Bella Listriani R. Usman Rery Rabiatul Adawiyah Rasmiwetti Rery, Radjawali Usman Rery, Radjawaly Usman Roza Linda Roza Linda Sari, Susy Eldila Shara, Aulia Rahmatia Sherly Aulia Sirmayeni, Sirmayeni Sri Haryati Sri Wilda Albeta Suci Sukma Susilawati Susilawati Susilawati Susilawati Susilawati, S. Susilawati, Susilawati Susy Eldila Sari Teja Pratama Putra Tiara Swastika Putri Utari Oktavianti