Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

6.028

P-Index

This Author published in this journals

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

Published : 59 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4 5

The Application Of Guided Inquiry Learning In Improving The Mastery Of Concepts And Science Process Skills On Vibration And Wave Material Juliatriyani Juliatriyani; Leny Heliawati; Surti Kurniasih
JSEP (Journal of Science Education and Practice) Vol 5, No 1 (2021): June 2021
Publisher : Universitas Pakuan

This research is a research that uses a quasi-experimental method with a Nonequivalent Control Group Design which aims to increase the ability to master concepts and science process skills of students who study wave vibrations with a guided inquiry approach and students who study wave vibrations using the demonstration method. The population used in this study was all students of SMPN 4 Cibinong in the even semester of the 2016-2017 academic years. The researcher determined that the population in this study was class VIII even semester who was studying vibrations and waves. The criteria for the success of this research are an increase in the ability to master concepts and an increase in science process skills for students who study wave vibrations using a guided inquiry approach and students who study wave vibrations using the demonstration method. The results of the analysis show that the application of guided inquiry learning can improve students' mastery of concepts and science process skills on vibration and wave material, which is indicated by an increase in N-Gain. The increase in the N-Gain mastery of students' concepts for the experimental class is 58.53% and the control class is 36.29%, while the increase in science process skills for the control class students is 26.43% in the low category, while the increase in the science process skills of the experimental class students is 64.44% in the medium category. In addition, students and teachers gave positive responses to the application of guided inquiry learning

MENINGKATKAN KETERAMPILAN BERPIKIR KRITIS DAN KREATIF SISWA MELALUI PEMBELAJARAN TATA NAMA SENYAWA KIMIA DENGAN MENGGUNAKAN MEDIA PIRINGAN KATION ANION Herlina Herlina; Leny Heliawati; Irvan Permana
JSEP (Journal of Science Education and Practice) Vol 3, No 1 (2019): June 2019
Publisher : Universitas Pakuan

Penelitian ini bertujuan untuk mengetahui sejauh mana pemanfaatan media piringan kation anion dapat membangun keterampilan berpikir kritis dan kreatif siswa pada pembelajaran tata nama senyawa. Metode yang digunakan dalam penelitian ini adalah preeksperimen dengan pre-postest design. Instrumen yang digunakan terdiri dari soal keterampilan berpikir kritis, penilaian observasi keterampilan berpikir kreatif, dan angket respon siswa. Hasil penelitian menunjukkan bahwa pembelajaran yang dikemas dengan model inquiri sesuai dengan tahapan pembelajaran yang direkomendasikan berdasarkan kurikulum 2013, ternyata mampu meningkatkan keterampilan berpikir kritis dan kreatif siswa. Hasil penelitian juga menunjukkan bahwa terdapat korelasi positif antara keterampilan berpikir kritis dengan keterampilan berpikir kreatif dengan korelasi 0,478 (cukup). Siswa juga memberikan respon positif terhadap pembelajaran.

Articulate Storyline 3 multimedia based on gamification to improve critical thinking skills and self-regulated learning Leny Heliawati; Linda Lidiawati; Indarini Dwi Pursitasari
International Journal of Evaluation and Research in Education (IJERE) Vol 11, No 3: September 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijere.v11i3.22168

This study measured the effectiveness of Gamification-based Articulate Storyline 3 multimedia on students' critical thinking skills and self-regulated learning. The research method used is a quasi-experimental method. The research subjects were 64 students and eight science teachers who have used the Gamification-based Articulate Storyline 3 multimedia on the nature of acidic, alkaline, and neutral solutions. Data collection techniques in this study were tests that aim to determine students' critical thinking skills and a questionnaire to measure students' learning independence. The data analysis technique was based on calculating the average score of the test items with high-order thinking skills and student learning independence. The study results obtained an average score of 81.50 for critical thinking skills on the material concept of the nature of the acid, base, and neutral solutions with an N-Gain of 72% in the high category. It was also known that the average percentage of student learning independence was 86.76% which falls into the good category. Therefore, Gamification-based Articulate Storyline 3 multimedia can improve students' critical thinking skills and independent learning on the nature of the acid, base, and neutral solutions.

Optimization of The Addition Of Polivinil Alcohol (PVA) as A Plasticizer In Biofilm with Tapioca-Chitosan Flour Material Tri Aminingsih; Leny Heliawati; Muhammad Fathurrahman
Helium: Journal of Science and Applied Chemistry Vol 1, No 1 (2021): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

The addition of a plasticizer, namely polyvinyl alcohol (PVA) as a plasticizer, will increase flexibility and prevent the polymer from cracking. The purpose of this study was to compare the mechanical properties of biofilms from tapioca-chitosan flour with or without the addition of polyvinyl alcohol (PVA) and determine the mass of polyvinyl alcohol (PVA) which can provide optimum mechanical properties of biofilms, test the biodegradability of biofilms and polypropylene plastics and to analyze biofilms using FT-IR. The making of biofilm from 4% tapioca flour and 2% chitosan was carried out by adding variations of polyvinyl alcohol as much as 0, 1, 2, 3, 4 and 5 grams to each tapioca-chitosan flour solution. The effect of adding polyvinyl alcohol (PVA) can be seen from the results of the tensile strength test, the breaking length test, the water resistance test and the biodegradability test. The resulting biofilm functional group analysis was performed by FT-IR. The results showed that the addition of PVA could increase the tensile strength and breaking length, but decreased the water resistance of the biofilm. The optimum mechanical properties of tapioca-chitosan flour biofilm resulted from the addition of 3 grams of PVA with a tensile strength of 2.163 kgf / cm2, the breaking length of 13.64% and 12.46% of absorbed water. Biofilms can be degraded by the fungus Aspergilus niger. The results of biofilm analysis using FTIR indicate the presence of functional groups (CH, NH2, NH, OH, CO and CN) which are the functional groups of the biofilm constituent materials. The optimum mechanical properties of tapioca-chitosan flour biofilm resulted from the addition of 3 grams of PVA with a tensile strength of 2.163 kgf / cm2, the breaking length of 13.64% and 12.46% of absorbed water. Biofilms can be degraded by the fungus Aspergilus niger. The results of biofilm analysis using FT-IR indicate the presence of functional groups (CH, NH2, NH, OH, CO and CN) which are the functional groups of the biofilm constituent materials.

IDENTIFICATION OF ANTIBACTERIAL COMPOUNDS FROM ENDOPHYTIC BACTERIAL EXTRACT OF GREEN GRASS CINCAU PLANT (PREMNA OBLONGIFOLIA MERR) Anna Muthia Soliha; Leny Heliawati; Siti Warnasih
Helium: Journal of Science and Applied Chemistry Vol 1, No 2 (2021): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Green grass jelly (Premna oblongifolia Merr) is a plant that belongs to the Verbenaceae family with the Premna genus. The genus Premna has about 200 species in the Verbenaceae family which are spread in tropical to subtropical areas such as Asia, Africa, and Australia. This plant has potential as antibacterial, antipyretic, anti-inflammatory, and antioxidant. This research was conducted to make an extract of endophytic bacteria obtained from green grass jelly plants by maceration method. The extract obtained was tested for its antibacterial activity by disc diffusion method. Extracts with the highest antibacterial activity were identified by FTIR and GCMS. The results showed that the methanol extract of endophytic bacteria of green grass jelly plants had broad spectrum antibacterial activity because it was able to inhibit the growth of Gram-positive bacteria (Bacillus subtilis) and Gram-negative bacteria (Pseudomonas aeruginosa). The results of FTIR and GCMS showed that the active compounds contained in the endophytic bacteria of green grass jelly plants were thought to be Nerolidol compounds or 3,7,11-trimethyl-1,6,10-dokatrien-3-ol which are secondary metabolites of the sesquiterpene alcohol group and play a role in as an antibacterial.

Antioxidant Activity Test from Vegetable Tomato (Solanum lycopersicum) and Cherry Tomato (Solanum lycopersicum var. Cerasiforme) in Hand and Body Cream Farida Nuraeni; Leny Heliawati; Melani Nurastuti
Helium: Journal of Science and Applied Chemistry Vol 2, No 1 (2022): Helium: Journal of Science and Applied Chemistry
Publisher : Universitas Pakuan

Dry, scaly, rough skin conditions accompanied by wrinkles and black spots characterize the skin that experiences premature aging. One of the causes of premature aging is free radicals. These free radicals can be overcome with natural or artificial antioxidants. Natural antioxidants are found in fruits and vegetables, one of which is tomatoes. Tomatoes in direct use are less effective, so they are made in the form of hand and body cream. Production of vegetable tomato and cherry tomato extracts fruit extraction and maceration using 96% ethanol, then concentrated with a rotary evaporator until the extract is thick. The extracts of vegetable tomatoes and cherry tomatoes were then tested for phytochemical, antioxidant activity, and identification of compounds with LC-MS, then applied to hand and body cream with a concentration of 1% and 3% with codes F0, F1, F2, F3, and F4. Hand and body cream of tomato extract are tested by measuring pH, viscosity, specific gravity, total microbial Contamination, homogeneity and testing for antioxidant activity using the DPPH method. Phytochemical test results showed that flavonoid compounds were present in both extracts. The antioxidant activity of vegetable tomato ethanol extract was obtained with an IC50 value of 947.81ppm, and an IC50 value of 473.51 ppm was obtained for cherry tomato extract. From the LC-MS analysis, the compounds contained in cherry tomatoes, namely esculeoside A and B as cytotoxic activity, dehydrotomat as an antibacterial, kaempferol-3-O-rutinoside as an antioxidant, and tomatidine as an antibiotic. Antioxidant activity of hand and body cream, hand and body cream F4 (964.05 ppm), hand and body cream F3 (1001.97 ppm), hand and body cream F2 (1033.73 ppm), hand body cream F1 (1036.61 ppm), and hand and body cream F0 (1486.14 ppm). Hand and body cream cherry tomato extract 3%, formula 4 (F4), has the highest antioxidant activity. It can be concluded that the addition of extract concentration affects the antioxidant activity value of hand and body cream. Body cream F2 (1033.73 ppm), hand body cream F1 (1036.61 ppm), and hand and body cream F0 (1486.14 ppm). Hand and body cream cherry tomato extract 3%, formula 4 (F4), has the highest antioxidant activity. It can be concluded that the addition of extract concentration affects the antioxidant activity value of hand and body cream. Body cream F2 (1033.73 ppm), hand body cream F1 (1036.61 ppm), and hand and body cream F0 (1486.14 ppm). Hand and body cream cherry tomato extract 3%, formula 4 (F4), has the highest antioxidant activity. It can be concluded that the addition of extract concentration affects the antioxidant activity value of hand and body cream.

Smart Apps Creator 3 Interactive Multimedia Based on Stream to Improve Students' Scientific Literacy During the Covid-19 Pandemic Leny Heliawati; Fenny Pebriani; Didit Ardianto
Journal of Innovation in Educational and Cultural Research Vol 3, No 4 (2022)
Publisher : Yayasan Keluarga Guru Mandiri

By applying a learning-based approach model Science, Technology, Religion, Engineering, Arts, Mathematics in online learning, this study intends to investigate Smart Apps Creator, an interactive multimedia application to promote students' scientific literacy. SAC interactive multimedia is used to learn the media and comprehend scientific concepts. Explaining problems, designing research, carrying them out, analyzing data, evaluating findings, and sharing knowledge are all aspects of scientific literacy. Through the use of this program, STREAM-based learning is being used to improve students' scientific literacy. The results of the students' pretest and posttest were used to collect and analyze the study data in the form of quantitative descriptive analysis. With 80 responses among the students who participated in the survey and five science teachers who had used STREAM-based interactive multimedia, the study tool was delivered to the target population via a WhatsApp group. The findings indicated that the average percentage of scientific literacy with N-Gain in the medium category was 68%, indicating an improvement in student learning as a result of the use of SAC interactive multimedia learning. The study's findings demonstrate that SAC-based STREAM interactive multimedia learning is statistically highly significant and has been demonstrated to be successful in raising students' levels of scientific literacy in online learning during the present epidemic.

Student communication skills from internalizing religious values to energy modules in life systems Leny Heliawati; Irvan Permana; Elvi Kurniasih
Jurnal Inovasi Pendidikan IPA Vol 6, No 1: April 2020
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jipi.v6i1.32307

This study aims to analyze the effect of energy modules in life systems on religious values and communication skills. This type of research is a quasi-experimental study with a population of 40 students in grade 7 in SMPN 1 Rumpin, Bogor district. The research design used was a one-group pre-test and post-test. The data obtained were then analyzed using quantitative descriptive. The finding shows that the application of energy modules in living systems effectively internalizes the religious values of students based on the average n-gain of 0.49 which is included in the medium category. Students’ communication skills reach a good category with a score of 78%. The study concludes that the energy module in living systems effectively internalizes religious values and students’ communication skills.

Critical Thinking Skills and Self-Regulated Learning Of Students during the Covid-19 Pandemic Linda lidiawati; Indarini Dwi Pursitasari; Leny Heliawati
EduChemia (Jurnal Kimia dan Pendidikan) Vol 7, No 1 (2022)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v7i1.10627

This study aims to analyze critical thinking skills and self-regulated learning of Junior High School Students on Change States of Matter material during online learning during Pandemic Covid 19. The research subjects were 200 junior high school students in the city and district of Bogor who had received the material for Change States of Matter. Data were collected using a test of critical thinking skills with multiple choice types and a questionnaire to measure students' self-regulated learning. The indicators used to measure critical thinking skills refer to FRISCO (Focus. Reason, Inference, Situation, Clarity, Overview), and indicators of learning independence include 3 phases, namely, planning, implementation, and evaluation. The data obtained were then analyzed descriptively and quantitatively. The results of this study indicate that the average level of students' critical thinking skills is still low, namely 33.34%, and the level of learning independence is quite good at 52.45%. There is a significant relationship between students' self-regulated learning and critical thinking skills (Sig = 0.000) in online learning mode.

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, Volume 02 Number 02 2019
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jsi.v2i2.1533

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%.

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

Title

Found 59 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 59 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 59 Documents
Search