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All Journal International Journal of Evaluation and Research in Education (IJERE) Jurnal Pendidikan Indonesia Alchemy : Journal of Chemistry Tadris: Jurnal keguruan dan Ilmu Tarbiyah Jurnal Inovasi Pendidikan IPA EduChemia: Jurnal Kimia dan Pendidikan Biopropal Industri Warta IHP (Warta Industri Hasil Pertanian) Jurnal Tadris Kimiya Indonesian Journal of Science and Education Journal of Science Innovare Komputasi: Jurnal Ilmiah Ilmu Komputer dan Matematika Al-Ta'lim Jurnal EDUCATIO: Jurnal Pendidikan Indonesia Jurnal ABDINUS : Jurnal Pengabdian Nusantara JPPS (Jurnal Penelitian Pendidikan Sains) Journal of Innovation in Educational and Cultural Research International Journal of Research in Community Services International Journal of STEM Education for Sustainability JSEP (Journal of Science Education and Practice) Helium: Journal of Science and Applied Chemistry Jurnal Pemberdayaan Masyarakat Jurnal Pendidikan Sains Indonesia (Indonesian Journal of Science Education) JIPI (Jurnal IPA dan Pembelajaran IPA) Kenduri: Jurnal Pengabdian Dan Pemberdayaan Masyarakat Journal of Environment and Sustainability Education Jurnal Pengabdian Isola ABDIMAS Iqtishadia IJIS Edu : Indonesian Journal of Integrated Science Education

Leny Heliawati

Universitas Pakuan

Author-ID : 2525586

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Social Sciences Other

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SYNTHESIS OF SCHIFF BASE VERDANTIOL BY SIMPLE CONDENSATION Niken Oktaviani; Leny Heliawati; Yudhie Suchyadi
Journal of Science Innovare Vol 2, No 2 (2019): Journal of Science Innovare, September 2019
Publisher : Universitas Pakuan

Schiff base is a chemical compound that is formed from the reaction between aldehydes and primary amines by condensation and produces by-products in the form of water. Schiff base is the raw material that is added in making Fragrance. The purpose of this study was to determine the method of synthesis of Schiff base verdantiol with simple condensation. The research method was carried out with four stages: preparation, synthesis, testing and measurement of parameters, and calculations. Preparation includes weighing the raw material Schiff base verdantiol. Schiff base synthesis is carried out by stirring at a temperature of about 90°C ± 5° C (Arctender, 1969) with a modification time of 15 minutes, 30 minutes, 1 hour, 2 hours and 3 hours. Testing and measurement parameters include organoleptic, density and specific gravity tests in pycnometer and compound confirmation using Gas Chromatography Mass Spectrometry. The results showed that the optimum synthesis of Schiff base verdantiol compounds was carried out at a heating time of 2 hours. The results of odor, color, density and gravity specifications heating time 2 hours according to specifications with the standard. GCMS confirmation results at 2 hours percent similarity are above 94%.

DEVELOPMENT OF COD (CHEMICAL OXYGEN DEMAND) ANALYSIS METHOD IN WASTE WATER USING SPECTRODIRECT Ade Heri Mulyati; Leny Heliawati; Sutanto .; Uswatun Hasanah; Diana Widiastuti; Siti Warnasih; Yulian Syahputri
Journal of Science Innovare Vol 3, No 2 (2020): Journal of Science Innovare
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jsi.v3i2.3006

Increased human activities will cause various problems, one of which is water pollution in water sources because it receives a pollution load that exceeds its carrying capacity. In the context of environmental conservation, the government has set quality standards for liquid waste produced by various industries and other activities in a Decree of the State Minister for the Environment. COD (Chemical Oxygen Demand) is one of the most important parameters in wastewater quality standards. This study aims to validate the COD analysis method which refers to COD Thermoreactor System (LOVIBOND brand) at Pakuan University Service Laboratory, to ensure the validity of COD analysis results at Pakuan University Service Laboratory. Spectrodirect COD analysis method provides results that meet the requirements of accuracy, precision, LOD, and LOQ which is quite good. The results of the Coefficient of Variation give good results with a value of 1.8841% indicating the accuracy of the analysis method is good. The accuracy parameter also gives good results and meets the requirements with a% recovery value of 98.70351%. Overall, it can be stated that the spectrodirect analysis method tested is an accurate, precise, simple, and economical method for determining COD levels

The Effect of Stream-Based Teaching Materials Using Android on Studentsâ€™ Problem-Solving Skills and Religious Attitudes Leny Heliawati; Fenny Pebriani; Didit Ardianto
AT-TA'LIM Vol 29, No 1 (2022)
Publisher : Institut Agama Islam Negeri Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15548/jt.v29i1.692

This study aims to develop water teaching materials using android on studentsâ€™ problem-solving skills and religious attitudes with a learning model of the Science, Technology, Religious, Engineering, Art, and Mathematics (STREAM) approach science subjects. The experimental method carried out by R and D uses the 4D design (Define, Design, Develop and Disseminate). The research data were collected and analyzed in the form of quantitative descriptive from the results of the studentsâ€™ pretest and posttest. This research was conducted through a google form by distributing a questionnaire, which was given to students with 50 respondents and five science teachers who had used STREAM-based water teaching materials using android. The results of the study, the average percentage of problem-solving skills with N Gain was 73% with a high category, which means that the application of learning materials based on android is proven to improve student learning. Assessment of religious attitudes in integrating material with the verses of the Quran is very good. This studyâ€™s conclusion shows that learning using STREAM-based teaching materials using android is statistically very significant, proven to be effective in improving studentsâ€™ problem-solving skills and religious attitudes to water material in online learning during the current pandemic.

Micro-Scale Liquid Smoke Extraction as a By-Product from Coconut Shell Charcoal Production in Kotabatu Village Uswatun Hasanah; Ade Heri Mulyati; Lenny Heliawati
International Journal of Research in Community Services Vol 3, No 2 (2022)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijrcs.v3i2.269

Liquid smoke is produced from the pyrolysis process and condensation from the coconut shell waste combustion process. This liquid smoke is known to have a high level of polyphenol content and is used as a rubber processing, deodorizing, and wood preservative to make it resistant to termites. In addition, it can also be used as an insecticide for plants. This community service is carried out to design and manufacture a micro-scale liquid smoke pyrolysis machine, which is expected to reduce the amount of smoke produced during the charcoal burning process, also to help partners create an additional type of product, namely liquid smoke. for plant insecticides so that it will increase partners' monthly income. The method that will be used in achieving this goal is to provide training and practice to partners on how to process cranium waste other than into charcoal, namely into liquid smoke as an insecticide in plants.

Students' Scientific Literacy in Chemistry Learning through Collaborative Techniques as a Pillar of 21st-Century Skills Carlina Anggraeni; Anna Permanasari; Leny Heliawati
Journal of Innovation in Educational and Cultural Research Vol 3, No 3 (2022)
Publisher : Yayasan Keluarga Guru Mandiri

This study aims to measure students' scientific literacy and collaboration skills. The method used was survey research on 267 high school students in Jakarta. The instrument in this study was a scientific literacy test of 40 multiple-choice PISA items developed by Moore and Foy (1997) and a non-test instrument in a rubric observation sheet to measure students' collaboration skills. The results show that students' scientific literacy is at a moderate level. Of 27 students, there are 3% of students with very high scientific literacy skills, 7% of students with high scientific literacy skills, 64% of students with moderate scientific literacy skills, 11% of students with low scientific literacy skills, and 15% of students with very low scientific literacy skills. The research concludes that scientific literacy is a skill that students must possess. Scientific literacy and collaboration skills are needed to face the demands of 21st-century learning with the rapid development of technology and knowledge.

The Effectiveness of Socioscientific Issue-Based Petroleum Materials Integrated with The Elsmawar Website on Studentsâ€™ Scientific Literacy Indang Dwi Rahayu; Anna Permanasari; Leny Heliawati
Journal of Innovation in Educational and Cultural Research Vol 3, No 2 (2022)
Publisher : Yayasan Keluarga Guru Mandiri

This study aims to determine the effectiveness of Socioscientific Issue (SSI)-based petroleum materials integrated with the eLSMAWAR website on studentsâ€™ scientific literacy during the COVID-19 Pandemic. However, it still targets the achievement of 21st-century skills, namely scientific literacy competencies. Scientific literacy is needed as a skill that can answer the demands of the 21st-century era, as a problem solver that is competitive, innovative, creative, collaborative, and has character. This research method uses Research and Development (R D), which refers to Borg and Gallâ€™s development model. The instrument used in this study was an expert validation sheet filled in by a validator which was useful for knowing whether it was feasible or not to develop. Students are given ten descriptive questions on a 1-4 Likert scale to determine the effect of teaching materials on scientific literacy. The data obtained were analyzed by descriptive quantitative. Expert validation resulted in an average percentage of 87% on material, presentation, language, and legibility aspects. For the validation of chemistry educators, the mean score of CVI for the language aspect and legibility is 0.80; the material aspect is 0.86; for the presentation, aspect is 0.84. This means that based on chemistry experts and educators, the criteria for SSI-based petroleum materials integrated with the eLSMAWAR website are appropriate/valid and very suitable for use. The scientific literacy test results obtained an N-Gain of 0.66, which means that the SSI-based teaching materials integrated with the eLSMAWAR website are quite effective in improving studentsâ€™ scientific literacy. The research concludes that the teaching material based on Socioscientific Issue (SSI) integrated with the eLSMAWAR website on studentsâ€™ scientific literacy with three indicators of scientific literacy is following the demands of the implementation of 21st-century skills.

PEMBELAJARAN INKUIRI TERBIMBING BERBASIS PRAKTIKUM PADA TOPIK LAJU REAKSI Tri Sundari; Indarini Dwi Pursitasari; Leny Heliawati
JPPS (Jurnal Penelitian Pendidikan Sains) Vol. 6 No. 2 (2017)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpps.v6n2.p1340-1347

Penelitian ini bertujuan menyelidiki pengaruh pembelajaran inkuiri terbimbing berbasis praktikum pada materi laju reaksi terhadap penguasaan konsep dan sikap ilmiah siswa. Penelitian dilaksanakan di salah satu SMA swasta di Kota Bogor kelas XI IPA pada tahun ajaran 2016/2017. Populasi berjumlah 192 siswa dengan jumlah sampel sebanyak 60 siswa yang dibagi ke dalam 31 siswa mengikuti pembelajaran inkuiri terbimbing berbasis praktikum dan 29 siswa mengikuti pembelajaran tradisional. Pengumpulan data dilakukan melalui test penguasaan konsep laju reaksi dan angket sikap ilmiah dengan skala likert. Data dianalisis secara statistik deskriptif dan inferensial menggunakan independent t-test. Hasil penelitian menunjukkan terdapat perbedaan yang signifikan antara penguasaan konsep siswa yang mengikuti pembelajaran inkuiri terbimbing berbasis praktikum (rata-rata 80,7) dan penguasaan konsep siswa yang mengikuti pembelajaran tradisional (rata-rata 74,8). Sikap ilmiah siswa juga menunjukkan perbedaan yang signifikan antara siswa yang mengikuti pembelajaran dengan inkuiri terbimbing berbasis praktikum (rata-rata 3,2) dan sikap ilmiah siswa yang mengikuti pembelajaran tradisional (rata-rata 2,2). Dengan demikian dapat disimpulkan pembelajaran inkuiri terbimbing berbasis praktikum dapat meningkatkan penguasaan konsep dan sikap ilmiah siswa.

PEMANFAATAN E-BOOK KONSEP ASAM BASA DALAM PEMBELAJARAN KIMIA UNTUK MENINGKATKAN LITERASI KIMIA SISWA SMA KELAS XI Rd. Nia Elisa Yulianti; Anna Permanasari; Leny Heliawati
JSEP (Journal of Science Education and Practice) Vol 3, No 1 (2019): June 2019
Publisher : Universitas Pakuan

Penelitian ini bertujuan untuk memperoleh informasi tentang pemanfaatan e-book dalam meningkatkan literasi kimia siswa pada materi asam basa. Dalam penelitian ini digunakan metode pre-eksperimen dengan pre-post test design, disertai dengan analisis deskriptif tentang literasi sains siswa dikaitkan dengan penggunaan e-book sebagai bahan ajar. Subyek penelitian terdiri dari 38 siswa kelas XI dari satu SMA di daerah Bogor, Jawa Barat, dan 3 guru kimia. Instrumen yang digunakan dalam penelitian ini terdiri dari tes literasi dan angket respon siswa serta guru. Hasil penelitian menunjukkan bahwa penggunaan e-book asam basa dapat meningkatkan minat siswa yang dibuktikan dari hasil tanggapan siswa. Hampir semua siswa menyatakan sangat menyenangi e-book, dan merasakan manfaatnya dalam belajar asam-basa, Guru juga memberikan respon yang sangat baik, 87% guru menyatakan bahwa e-book asam-basa sangat memudahkan guru dalam pembelajaran sebagai sumber belajar alternatif. Hasil penelitian lebih lanjut menunjukkan bahwa pemanfaatan e-book dapat meingkatkan literasi sains siswa, dengan peningkatan (Ngain) sebesar 40,2% (kategori sedang).

Pembelajaran Inkuiri Terbimbing Berbasis Pratikum Pada Topik Pengukuran Untuk Meningkatkan Penguasaan Konsep dan Keterampilan Proses Sains Siswa SMP Mahrun Mahrun; Anna Permanasari; Leny Heliawati
JSEP (Journal of Science Education and Practice) Vol 1, No 1 (2017): December 2017
Publisher : Universitas Pakuan

Abstrak: Penelitian kuasi eksperimen ini bertujuan untuk mengimplementasikan pembelajaran inkuiri terbimbing berbasis pratikum untuk meningkatkan penguasaan konsep dan keterampilan proses sains siswa pada topik pengukuran. Sebanyak 83 siswa SMP Kelas I terlibat dalam penelitian ini. Subjek penelitian dikelompokkan dalam kelompok eksperimen dan kelompok kontrol. Kelompok eksperimen mendapat perlakuan pembelajaran inkuiri berbasis peratikum sedangkan kelompok kontrol mendapat perlakuan pembelajaran berbasis pratikum. Penelitian ini menggunakan instrumen pilihan ganda untuk menjaring penguasan konsep siswa, sedangkan keterampilan proses sains dijaring dengan menggunakan tes esay. Hasil analisis menunjukkan bahwa pembelajaran inkuiri terbimbing berbasis praktikum pada topik penguran dapat meningkatkan penguasaan konsep dan Keterampilan Proses Sains (KPS) siswa. Peningkatan penguasaan konsep untuk kelas eksperimen adalah 54.58% sedangkan kelas kontrol adalah 26.60%. Peningkatan Keterampilan Proses Sains (KPS) pada kelas eksperimen sebesar 67.80% dengan kategori tinggi, sedangkan Keterampilan Proses Sains (KPS) kelas kontrol adalah 27.25% dengan katerogi sedang. Hasil analisis juga menunjukkan bahwa terdapat korelasi positif antara penguasaan konsep dan Keterampilan Proses Sains (KPS). Siswa juga memberikan tanggapan positif terhadap impelementasi pembelajaran inkuiri terbimbing berbasis praktikum.Kata Kunci: Pembelajaran Inkuiri, Pratikum, Penguasaan Konsep, Keterampilan Proses Sains

PEMBELAJARAN BOUNDED INQUIRY LABS UNTUK MENINGKATKAN PENGUASAAN KONSEP DAN KEMAMPUAN BERPIKIR ANALISIS SISWA PADA TOPIK HIDROLISIS GARAM Henrikus Suparjono; Indarini Dwi Pursitasari; Leny Heliawati
JSEP (Journal of Science Education and Practice) Vol 2, No 1 (2018): Juni 2018
Publisher : Universitas Pakuan

Hidrolisis garam merupakan salah satu materi pelajaran kimia yang diajarkan di kelas XI SMA. Sebagian besar (60%) siswa menyatakan materi hidrolisis garam tergolong sukar.Tujuan dari penelitian ini adalah untuk menerapkan pembelajaran bounded inquiry labs untuk meningkatkan penguasaan konsep dan kemampuan berpikir analisis siswa pada topik hidrolisis garam. Metode dalam penelitian ini adalah kuasi eksperimen dengan desain Nonequivalen Pretest-Posttest Control Group Design. Ada dua kelompok sampel yaitu kelompok eksperimen dan kelompok kontrol yang dipilih secara purposive sampling. Kelas kontrol dengan pembelajaran langsung dan kelas eksperimen dengan pembelajaran bounded inquiry labs. Instrumen sudah divalidasi dan reliabel. Data yang terkumpul dianalisis secara deskriptif dan inferensial. Hasil penelitian yang terdiri dari penguasaan konsep dan kemampuan berpikir analisis menunjukkan terdapat kenaikan N-gain antara kelas kontrol dan kelas eksperimen. Hasil uji statistik dengan uji t-Test diperoleh signifikansi (sig.(2-tailed)) sebesar 0,019 untuk penguasaan konsep dan 0,002 untuk kemampuan berpikir analisis, yang berarti dari 0,005 menunjukkan terdapat perbedaan yang signifikan antara penguasaan konsep kelas kontrol maupun kelas eksperimen. Hasil ini diperkuat dengan tanggapan siswa yang menyatakan siswa lebih termotivasi dalam mengikuti pembelajaran BIL dan mereka terbantu dalam pencapaian nilai ulangan yang labih baik. Kata Kunci: Penguasaan Konsep, Kemampuan Berpikir Analisis, Bounded Inquiry Labs, Hidrolisis Garam

Co-Authors Ade Gunawan Ade Gunawan Ade Heri Mulyati Ade Heri Mulyati, Ade Heri Adinda Adriansyah, Putri Nabila Adriansyah, Putri Nabila Adinda Afakillah, I.Ibnu Agus Ismangil Anna Muthia Soliha Anna Permanasari Arifah, Laila Asep Kadarohman Asep Saepulrohman Bibin Rubini Bustanussalam Bustanussalam Carlina Anggraeni Dadang Jaenudin Diana Widiastuti Didit Ardianto Didit Ardianto Dwi Pursitasari, Indarini Eka Herlina Elvi Kurniasih Elvi Kurniasih Eris Septiana Farida Nuraeni Fauzia Nurul Izzati Fauziah, Zahra Nur Fauzy Rachman Fenny Pebriani Fenny Pebriani Firmayanto, Rudi Giyanto Giyanto Harianto, Bibit Henrikus Suparjono Herlina Herlina I. Dwi Pursitasari I.Ibnu Afakillah Indang Dwi Rahayu Indarini Dwi Pursitasari Juliatriyani Juliatriyani Kabir, Abyan Jausan Karimah, Fani Ulya kerans, geterudis Khoiriyah, Ainun Kurniasih, Septi Kurniasih, Surti Layung Paramesti Martha Lidiawati, Linda Linda Jati Kusumawardani Linda Lidiawati Linda Lidiawati Linda lidiawati M Zainal Arifin, M Zainal Mahrun Mahrun Mahrun Mahrun, Mahrun Makmuri Makmuri Melani Nurastuti Misbah Misbah Momo Rosbiono Mr Sjaeful Anwar Muhammad Fathurrahman Muhammad Fathurrahman Mulyani, Pangastuti Sri Nabila Adinda Adriansyah, Putri Nanang Winarno Niken Oktaviani Nulhakim, Lukman Parlindungan Sinaga Partomuan Simanjuntak Pebriani, Fenny Prasetyorini Prasetyorini Pursitasari, I. Dwi Rahmawati, Siti Irma Ramadhan, Muhamad Farhan Rd. Nia Elisa Yulianti Rienoviar, - Rita Retnowati Rudi Firmayanto Salam, Abduh Semuel Unwakoly Siti Fatimah Siti Warnasih Sundari, Tri Surti Kurniasih Sutanto . Syamsiah Syamsiah Taufik, Annisa Novianti Tri Aminingsih Tri Aminingsih Tri Sundari Uswatun Hasanah Utami, Indri Sari Uun Sundari Uun Sundari Uun Sundari Warliyah, Heli Wien Kusharyoto Yatri Hapsari Yudhie Suchyadi Yulian Syahputri Yuliani, Galuh Zulnaidi, Hutkemri

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