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All Journal VALENSI Cakrawala Pendidikan Jurnal Kependidikan: Penelitian Inovasi Pembelajaran JPMS (Jurnal Pendidikan Matematika dan Sains) Jurnal Penelitian Saintek Jurnal Inovasi Pendidikan Jurnal Sains Dasar Jurnal Inovasi Pendidikan IPA Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Indonesian Journal on Learning and Advanced Education (IJOLAE) Molekul: Jurnal Ilmiah Kimia Jurnal Eduscience (JES) Jurnal Paedagogy Indonesian Journal of Chemistry and Environment SAINSTECH: Jurnal Penelitian dan Pengkajian Sains dan Teknologi Jurnal Elemen Kimia Jurnal Riset Pembelajaran Kimia Jurnal Pendidikan MIPA
Endang Widjajanti Laksono FX
Universitas Negeri Yogyakarta
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Other

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PENGEMBANGAN LEMBAR KERJA SISWA (LKS) MATA PELAJARAN SAINS KIMIA UNTUK SMP Rohaeti, Eli; LFX, Endang Widjajanti; Padmaningrum, Regina Tutik
Jurnal Inovasi Pendidikan Vol 10, No 1 (2009)
Publisher : Jurnal Inovasi Pendidikan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (76.454 KB)

Abstract

This research was about the development of learning source in chemistry education. The aims of this research are: (1) to arrange and to develop student's working sheet on chemistry science aspect for SMP/MTs based on the education unit level curriculum (KTSP) using quality criteria and (2) to evaluate quality the student's working sheet on chemistry science aspect based on the education unit level curriculum as required by science teachers of SMP and chemistry teachers of SMA. This research included two steps: arranging and developing student's working sheet on chemistry science aspects and evaluating quality of student's working sheet. The sheet was developed based on competency standard of chemistry science aspect at grade seven and eight including (1) substance classification, (2) substance state and changes and the properties in physical and chemistry changes, (3) matter particles, (4) the usefulness of chemical material in life, and (5) addictive and psychotropical. The sheet quality was evaluated by 2 SMP science teachers and 3 SMA chemistry teachers, and then the scores were compared with ideal score. The quality criteria of the sheet were interpreted from 10 aspects. The quality of student's working sheet on chemistry science aspect for topics (1) substance classification, (2) substance state and changes and the properties in physical and chemistry changes, (3) matter particles, (4) the usefulness chemical material in life and (5) addictive and psychotropical is very good with score 98.2; 98.8; 98.4; 102.4, and 102.2 respectively or 81.8%; 82.3%; 82%, 85.3% and 85.2%.
Uji Kinerja Fotodegradasi Kain Terlapisi Komposit Nanosized Chitosan/TiO2 Terhadap Zat Warna Rhodamine B Eli Rohaeti; Endang Widjajanti Laksono FX; Anna Rakhmawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (699.541 KB) | DOI: 10.15408/jkv.v2i1.3111

Abstract

The coating of nanosized Chitosan/TiO2 composit on cotton fabrics substrate and its performance for dye of Rhodamine B was studied. Nanosized Chitosan/TiO2 composit coated on cotton fabrics was done by dip-coating method through pad-dry-cure technic. Cotton fabric thats was coated by nanosized Chitosan/TiO2 composit was characterized by SEM, XRD, and FTIR. Photodegradation Performance test of cotton fabric coated Nanosized Chitosan/TiO2 composit for dye of Rhodamine B was done under UV ray and sun ray.  It was concluded that was cotton fabric coated nanosized Chitosan/TiO2 can decompose dye of Rhodamine B with UV ray more effective than sun ray. Keywords : Dip-coating, photodegradation, nanosized chitosan/TiO2, cotton fabric, rhodamine B DOI: http://dx.doi.org/10.15408/jkv.v2i1.3083
PENERAPAN PRAKTIKUM KIMIA BERMUATAN LIFE SKILLS SEBAGAI UPAYA MEMPERSIAPKAN CALON GURU YANG BERKARAKTER Endang Widjajanti
Jurnal Cakrawala Pendidikan No 3 (2010): Mei 2010, Th. XXIX, Edisi Khusus Dies Natalis UNY
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/cp.v1i3.256

Abstract

Abstract: Character Education for Chemistry Students Through PracticumsLaden with Life-Skills. This study aims to build chemistry students charactersthrough Physical Chemistry I and II practicums laden with life skills. This actionresearch study consisted of four steps, i.e. planning, action, observation andreflection and involved students joining Physical Chemistry I and II laboratorywork. The study focused on psychomotor and affective aspects. The instrumentswere observation sheets and questionnaires. The data were analyzed using thequalitative descriptive technique. The results show that Physical Chemistry I and IIlaboratory work activities laden with life skills can build students characters. Theycan develop such characters as discipline, responsibility, obedience, thoroughness,thriftiness, truthfulness, gentleness, tolerance, initiative, creativeness, and wisdom.Keywords: life skills, character building
Penerapan Pendekatan Pembelajaran Sistemik untuk Meningkatkan Pemahaman Konsep Mahasiswa pada Kuliah Kimia Dasar I Suyanta Suyanta; Marfuatun Marfuatun; Endang Widjajanti LFX
Jurnal Pendidikan Matematika dan Sains Vol 1, No 1 (2013): June 2013
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (151.569 KB) | DOI: 10.21831/jpms.v1i1.12478

Abstract

Tujuan penelitian ini adalah mengetahui langkah-langkah penerapan pendekatan pembelajaran sistemik pada kuliah Kimia Dasar I dan mengetahui ada tidaknya peningkatan pemahaman konsep maha-siswa pada Kuliah Kimia Dasar I setelah menggunakan pendekatan pembelajaran sistemik. Penelitian ini di desain sebagai penelitian tindakan kelas yang meliputi empat tahap yaitu perencanaan, tindakan, pengamatan, dan refleksi. Subyek penelitian adalah mahasiswa Pendidikan Kimia yang mengikuti mata kuliah Kimia Dasar I. Obyek penelitian adalah pemahaman konsep mahasiswa. Penerapan pendekatan pembelajaran sistemik dilakukan dengan diskusi dan pemberian tugas. Mahasiswa diminta untuk membu-at diagram siklis yang menunjukkan keterkaitan antar materi kimia. Hasil penelitian menunjukkan ada peningkatan kemampuan berpikir komprehensif mahasiswa, dengan skor kemampuan konsep kimia mahasiswa pada siklus I sebesar 31,48 dan siklus II sebesar 35,48, dengan skor maksimal 50.Kata kunci: pendekatan sistemik, diagram siklis, kemampuan konsep kimia
Cr-Fe KOADSORPSI BY KITOSAN Endang Widjajanti; AK Prodjosantoso
Jurnal Penelitian Saintek Vol 13, No 1: April 2008
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.095 KB) | DOI: 10.21831/jps.v13i1.185

Abstract

This study aims to determine the ability of adsorption of chitosan on Cr (III) and Fe (III) ions simultaneously in various concentration variations. As research subject is chitosan isolated from crab shells and made through three stages namely deproteination stage, demineralisasi and deasetilasi. As the object of research is the adsorption power of chitosan against Cr (III) and Fe (III) metal ions, both for each ion and simultaneously. The adsorption process using a batch system is carried out for 24 hours at room temperature under optimum pH system conditions with a 1: 100 (w / v) adsorbent ratio at concentrations of 100 ppm to 1000 ppm. Chitosan adsorption is the ratio between the amount of metal ions adsorbed per gram of chitosan, adsorbat concentration is determined using Atomic Absorption Spectrophotometer The results showed that the adsorption capacity of chitosan on Fe (III) was stronger than Cr (III) in both single adsorption and simultaneous adsorption, and the process was classified as coadsorption.
NITROGEN ADSORPTION OF URINE WITH ZEOLITE M.Pranjoto Utomo; Endang Widjajanti; Kun Sri Budiasih
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6368.514 KB) | DOI: 10.21831/jps.v15i1.19168

Abstract

Tlte aints of the research v,ere to determine the nitrogen contained in humatt ttrine before and after ipplying zealyte ancl  to determine the influence o.f MgO to nitrog'n contained in human urine. The tJetermination ofZeolyte aclsorptio  capacity' to nitrogen contained in htrmqn trrine inclLtcled 3 s'teps. Activation ol' nature zeolf ie'nitrogen adsorptiort' Iotal nin"ogen determination Ly Kjeclahl test. Zeolyte activation wqs done by soaking zeollte itio0' 1 14 HCl, HNO: and H2soafor I hour and calcin(ltedJbr t hours at 100"c. The  adsorption proses  adding  y,as  clone byaicting inactivated ancl activated zeolyte tuithand without MgOThe iptimunt mass of zeolyte was 3 grants. The adsorption capacities oJ' inactivated zeolytes u,ithoutAnd with LttgO adcting were 0.00780994 and 0.0102% pq grdm zeolyte, respectivety. The adsorptionCapacities of activated zeoll'te by HCl, HNO: dan H:SO| wiihout Mgo addingw)re 0.00i01%,0.006610.4, and  0a0917?i,  per gram:eolil'te. Lhe adsorption capacities of activated zeolyle by HCl, HNO j dan H2SO| v'i* )IgO udding were 0.00839%,0.0i01%  dan 0.011% per gram zeoll'te. The activation and lulgO adr)ing increasecl the aclsorption capacitl' oJ' zeolyte to nitrogen contained in httman urine.
Pola adsorpsi pewarna azo oleh biosorben dari kulit pisang Endang Widjajanti LFX; Marfuatun '; Dewi Yuanita
Jurnal Sains Dasar Vol 2, No 2 (2013): October 2013
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v2i2.3292

Abstract

Abstract This study aims to determine the optimum mass, optimum agitation times and the   effect of the concentration of direct red dye was adsorbed by charcoal of ambon and kepok banana peels. And to determine the influence of activator concentration of NaOH on the adsorption capacity of ambon and kepok banana peels on the adsorption of direct red dye. The subject of this study is the ambon and kepok banana peels. The object of this study is the efficiency of adsorption. The parameters in this study are the mass of adsorbent, agitation times, dye concentrations, and the concentration of NaOH activator. Adsorption capacity of banana peels to direct red dye is determined by the difference of concentration before and after adsorption. The concentration of dye was determined using a spectrophotometer at an optimum wavelength of visible light. The result shows that the optimum mass and agitation time for direct red dye adsorption which are adsorbed by the charcoal both of ambon and kepok banana peels adsorbent is 0.5 grams per 50 mL of the adsorbate and 2 hours, respectively. Direct red dye concentration does not affect the efficiency of adsorption ambon banana peel charcoal but influences the efficiency of adsorption kepok banana peel charcoal. The greatest adsorption ability of ambon and kepok  banana peels are given by NaOH activator at 0.5 M and 1 M. Key words: banana peel, banana peel charcoal, direct red, agitation time
PENGEMBANGAN DAN IMPLEMENTASI PERANGKAT PEMBELAJARAN IPA BERBASIS INKUIRI Andi Wibowo; Endang Widjajanti Laksono
Jurnal Inovasi Pendidikan IPA Vol 1, No 2: October 2015
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (405.875 KB) | DOI: 10.21831/jipi.v1i2.7492

Abstract

Penelitian ini bertujuan untuk menyelidiki kelayakan dan efektivitas perangkat pembelajaran IPA berbasis inkuiri untuk meningkatkan creative thinking skills dan work creatively with others siswa SMP. Penelitian ini menggunakan model pengembangan Borg Gall. Prosedur penelitian ini meliputi (1) studi pendahuluan, (2) perencanaan, (3) pengembangan draf produk awal, (4) revisi pertama, (5) uji coba lapangan pendahuluan, (6) revisi kedua, (7) uji coba lapangan utama, (8) revisi produk akhir, dan (9) diseminasi. Subjek uji coba produk yaitu siswa kelas VII SMPN. Teknik pengambilan data menggunakan metode observasi, angket, dan tes. Lembar angket validasi dan lembar angket keterbacaan LKS digunakan untuk mengukur kelayakan perangkat pembelajaran. Soal pretest-posttest dan lembar penilaian proyek digunakan untuk mengukur creative thinking skills. Lembar angket, lembar observasi, dan lembar penilaian antarteman digunakan untuk mengukur work creatively with others. Kelayakan perangkat pembelajaran dianalisis dengan konversi skor menggunakan skala 4. Efektivitas perangkat pembelajaran dianalisis dengan paired-samples t test, multivariate analysis of covariance (mancova), gain score, dan persen peningkatan. Hasil penelitian ini berupa produk perangkat pembelajaran IPA berbasis inkuiri pada tema “Kalor dan Pengaturan Suhu Tubuh” yang layak dan efektif meningkatkan creative thinking skills dan work creatively with others siswa. Kata Kunci: perangkat pembelajaran IPA, inkuiri, creative thinking skills, work creatively with others.   DEVELOPING AND IMPLEMENTATION AN INQUIRY-BASED NATURAL SCIENCE LEARNING PACKAGE Abstract This study aims to investigate the appropriateness and the effectiveness of inquiry-based natural science learning package to improve junior high school student’s creative thinking skills and work creatively with others. This study employed the development model by Borg Gall. The research procedure consisted of: (1) preliminary study, (2) planning, (3) developing preliminary form of product, (4) first revision, (5) preliminary field testing, (6) second revision, (7) main field testing, (8) final product revision, and (9) dissemination. The product testing subjects were students of grade VII SMP. The data were collected through questionnaires, observations, and tests. Pretestt-posttest questions and project assessment sheet were used to measure creative thinking skills. Questionnaires, observa-tion sheet, and peer assessment sheet were used to measure work creatively with others. The appro-priateness of learning package was analyzed through four scales converted. The effectiveness of learning package was analyzed through paired-samples t test, multivariate analysis of covariance (mancova), gain score, and percentage of improvement. The result of the study was an inquiry-based natural science learning package for the “Heat and Body Temperature Regulatory” topic which appropriates and could improve student’s creative thinking skills and work creatively with others effectively. Keywords: natural science learning package, inquiry, creative thinking skills, work creatively with others
INVESTIGATING STUDENTS’ CRITICAL THINKING SKILL IN CHEMICAL EQUILIBRIUM USING THE DISCOVERY LEARNING Fajarisma Izzatul Nadia; Endang Widjajanti Laksono
Jurnal Kependidikan Vol 5, No 1 (2021)
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jk.v5i1.40337

Abstract

This study aimed to determine the effect of discovery learning on the students’critical thinking skill. The research was a comparative study with 64 students of 11th grade that were randomly selected from senior high school in Yogyakarta. The data of critical thinking was collected through the critical thinking test instrument. Face content and construct validity conducted as initial step in developing the instrument before the test was used to measure students’ critical thinking skill toward the research sample. The instrument went through the RD for examining its validity and reliability using the Partial Credit Model with the result of validity showed 8 of 10 items fit with model. The study analysis was conducted using t-test and  descriptive analysis. The results of this study show there was a significant difference in students’ critical thinking between the experiment and control group. The profile results of critical thinking skill indicate that indicators of problem identification were better compared to other indicators learning.
Pengembangan Metode Pembelajaran Kooperatif secara Online pada Kuliah Kimia Fisika II Marfuatun Marfuatun; Endang Widjajanti LFX; Suwardi Suwardi
Jurnal Pendidikan Matematika dan Sains Vol 1, No 2 (2013): December 2013
Publisher : Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (74.128 KB) | DOI: 10.21831/jpms.v1i2.2479

Abstract

Tujuan penelitian ini adalah untuk mengetahui  desain, tingkat keterlaksanaan dan efektivitas pembe-lajaran kooperatif secara online pada kuliah Kimia Fisika II. Penelitian ini didesain sebagai penelitian pengembangan dengan tujuh tahap yaitu perencanaan, pengembangan metode, aplikasi I, revisi I, aplikasi II, revisi II dan evaluasi. Hasil penelitian menunjukkan bahwa desain metode pembelajaran kooperatif seca-ra online yang lebih efektif adalah pembagian kelompok, kuliah tatap muka dengan dosen, diskusi dilaku-kan secara online, penulisan laporan kegiatan diskusi secara online, dan evaluasi secara online. Tingkat keterlaksanaan penerapan metode pembelajaran kooperatif secara online cukup baik, namun perlu adanya dukungan sarana yang memadai, baik komputer maupun server e-learning. Adapun penerapan metode pembelajaran kooperatif secara online dianggap belum efektif, karena tingkat ketuntasan belajar mahasiswa baru mencapai 25,93% dengan nilai rata-rata 65,7.Kata kunci: pembelajaran kooperatif, online, efektivitas
Co-Authors A.K Prodjosantoso A.K Prodjosantoso Afikah, Adilah Amalia, Puspita Andi Wibowo Anjamampionona Notiavina, Andriandrainiarimanana Anna Rakhmawati APRILIANA, APRILIANA Apriliyani Dwi Iriyanti Ariefiani, Nurlaila Widyanarti Desfi Annisa Desfi Annisa Desfi Annisa, Desfi Deti Suwanti Dewi Yuanita Dewi Yuanita Dewi Yuanita Lestari Dewi Yuanita Lestari Eli Rohaeti Fajarisma Izzatul Nadia Febri Saputri Goni, Nur Abdul Habibil Mazid Hari Sutrisno Inviolata, Lusia Isana Supiah Yosephine Louise Joronavalona, Rasamimanana K.H. Sugiyarto, K.H. Kun Sri Budiasih Kuntadi Kuntadi Latifah Rachmalia M. Pranjoto Utomo Marfuatun ' Marfuatun Marfuatun Marfuatun, Marfuatun Masriat, Ester Muhsin, Lalu Busyairi Mustika, Lely Nur Syarifah Sukarno Pratama, Faiz Ilham Putri Nur Halimah Putri Utha Cahyaningrum Regina Tutik Padmaningrum Rivolino Merbas SAPUTRI, FEBRI Situmorang, Suryani S Sri Novita Yanda Sukisman Purtadi Sulistyani Sulistyani Sulistyani Sulistyani Suwardi Suwardi Suwardi Suwardi Suyanta Suyanta Syahril Taufik Tafani, Tafani Wijayanti Wijayanti Wileri Mandabi Yanda, Sri Novita