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All Journal Jurnal Inovasi Pendidikan Kimia Jurnal Penelitian Pendidikan Matematika dan Sains Matematika dan Sains J-PEK (JURNAL PEMBELAJARAN KIMIA) Jurnal Pendidikan Kimia (JPKim) Indonesian Journal of Chemistry Journal of Science Education Research JCER (Journal of Chemistry Education Research) Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat JPPIPA (Jurnal Penelitian Pendidikan IPA) Jurnal Abdi: Media Pengabdian Kepada Masyarakat Jurnal Penelitian Pendidikan Matematika dan Sains Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Hydrogen: Jurnal Kependidikan Kimia Berkala Penelitian Hayati Jurnal Pijar MIPA Journal of Educational Sciences UNESA Journal of Chemical Education Asian Journal of Science Education

Mitarlis Mitarlis

Universitas Negeri Surabaya

Author-ID : 3499010

Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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PENINGKATAN KADAR PATCHOULI ALCOHOL PADA MINYAK NILAM (Pogostemon cablin Benth) DENGAN METODE DISTILASI FRAKSINASI VAKUM Rahma Isfaroiny; Mitarlis
JURNAL PENELITIAN BIOLOGI BERKALA PENELITIAN HAYATI Vol 10 No 2 (2005): June 2005
Publisher : The East Java Biological Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23869/445

The quality of nilam (Pogostemon cablin Benth) oil depend on it patchouli alcohol value. At there time nilam farmers just has produced nilam oil with patchouli alcohol value about 26–28%. To increase this value, fractional vacuum distillation had been done in this study. Nilam oil has been isolated from drying leaf of nilam plant. Patchouli alcohol in this oil was analyzed by gas chromatography, next the oil was distillated by fractional vacuum and the patchouli alcohol was determined from each fraction. This study showed that fractional vacuum distillation of nilam oil gives a higher patchouli alcohol value. The increasing was 23.3387%; from 35.022% at nilam oil before fractination vacuum distillation to 58.3515% at the third fraction from fractional vacuum distillation. In fact, the fourth fraction had the highest patchouli alcohol, but it had dark colour so isn’t fill the standard quality.

Pengembangan LKPD Berorientasi STEM dengan Model PjBL Materi Larutan Elektrolit Nonelektrolit dengan Memanfaatkan Bahan Sekitar Anisatul Ma'sumah; Mitarlis Mitarlis
Jurnal Inovasi Pembelajaran Kimia (Journal Of Innovation in Chemistry Education) Vol 3, No 1 (2021): APRIL 2021
Publisher : Universitas Negeri Medan

The aim of this research is producing student worksheets STEM-oriented with PjBL model of electrolyte and non-electrolyte matter by utilizing surrounding materials. This study used 4-D development model (four-D model), which is a development model consisting of 4 main stages: Define, Design, Develop, and Disseminate. This research was limited to the develop stage and limited trials were carried out on 9 students of SMAN 1 Gedangan Sidoarjo. The feasibility of student worksheets is seen based on aspects of validity, practicality, and effectiveness. This research shows the results of the validity student worksheets on the content criteria as 85.84% and the construct validity of 86.56% on very good category. The results of students' responses to the student worksheets obtained a percentage of 96.67% on very practical category, observation of the first to the third meetings obtained an average percentage of 90.65% on very practical category. The results effectiveness of the student worksheets obtained an average N-Gain score of 0.83 with a high category which proved that the learning outcomes of students have increased on the tests before and after learning to use student worksheets.

Student worksheet oriented on science, technology, engineering, and mathematics (STEM) with PjBL model on acid base matter by using natural product Imtikhana Nur Khofifah; Mitarlis Mitarlis
Jurnal Pendidikan Kimia (JPKim) Vol 13, No 1 (2021): April
Publisher : Pascasarjana Universitas Negeri Medan

This study aims to describe the feasibility of the student worksheet developed in improving critical, creative, collaborative, and communicative thinking skills of students on acid-base material by using natural product. The student worksheet developed refers to the project-based learning model, which is integrated to science, technology, engineering, and mathematics (STEM). Method of this study uses a 4-D model (define, design, develop and disseminate), which is limited only to the development stage, and limited trials are carried out to nine students at senior high school. The feasibility of student worksheet is viewed from three aspects, namely validity, practicality, and effectiveness. The validity is viewed from the results of content and construct validity. The results obtained on each criterion show that the percentage score of 92.95% and 91.15% on very good category. The student worksheet's practicality in terms of activity observation and student response for each component obtained a percentage score of 95.18% and 88.09% on very practical category. The student worksheet's effectiveness in terms of the completeness of student learning outcomes showed an increase in the average N-Gain score of 0.84 on very high category and declared effective. Thus, the feasibility of the developed student worksheet in terms of all aspects such as percentage of scores obtained ≥ 61% in the aspects of validity, practicality and N-gain ≥ 0.3 in the aspect of effectiveness. So, the developed students worksheet oriented to STEM with PjBL model on acid base matter by using natural product is feasible for use in the learning.Keywords: acid-base, PjBL, STEM, student worksheet

THE USE OF THE FURFURAL FROM THE SOLID WASTE OF SUGAR INDUSTRY (BAGASSE) TO SYNTHESIZE β-(2-FURYL) ACRYLIC ACID AS AN ALTERNATIVE FOR THE RAW MATERIAL OF SUNSCREEN COMPOUND Mitarlis Mitarlis; Prima Retno Wikandari
Indonesian Journal of Chemistry Vol 5, No 3 (2005)
Publisher : Universitas Gadjah Mada

The research of the usefullness of furfural from bagasse for the production of β-(2-furyl)-acrilyc acid as an alternative raw material of sunscreen compound had been done. The research was done on two stages, the first stage was synthesis of furfural from bagasse and the second was synthesis of β-(2-furyl)-acrilyc acid that is an analog of cynnamic acid in which some derivatives are known possess activities as sunscreen. Cynnamic acid could be produced from benzaldehyde by Perkin methods using alkali hydrolysis. With the similarity of the main structure, so β-(2-furyl)-acrilyc acid can also be synthesized from furfural by Perkin method. The β-(2-furyl)-acrilyc acid had been synthesized in this research from furfural isolated from bagasse by NaOH hydrolysis. Synthesis was done by reflux for 2 hr at 140 - 145 oC and 3 hr at 145 - 150 oC. From the spectroscopic data its known that furfural could be produced from bagasse in 11.65 % yield and 33.83% of β-(2-furyl)-acrilyc acid from the synthesis on the second process. The UV -Vis spectrophotometer analysis result of β-(2-furyl)-acrilyc acids showed λmax at 296.20 nm. It showed that until this step the sunscreen compound can be resulted from furfural isolated from bagasse, especially as a sunscreen that protected skin from eritema (λmax at 290 - 320 nm) that is called as sunscreen UV-B.

DEVELOPMENT OF STUDENTS WORKSHEET WITH MIND MAPPING STRATEGY TO IMPROVE THE STUDENTS CREATIVE THINKING SKILLS ON STOICIOMETRY MATERIALS Hikma Wardani; Mitarlis Mitarlis
JCER (Journal of Chemistry Education Research) Vol. 3 No. 2 (2019): Volume 3 No. 2 December 2019
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v3n2.p58-64

The learning process of 2013 curriculum emphasizes on the students skill, it also demands them to be more active and have extraordinary abilities such as creative thinking skills. The purpose of this study is to describe the feasibility of the Students Worksheet with the mind mapping strategy to improve the students creative thinking skills on stoichiometry material. There are tree aspects which were observed in the students worksheets to measure the feasibility, those are content, presentation, and language. This study was conducted based on 4-D development model which has been modified into 3-D (define, design, and develop). The limited trial was implemented on 12 students of X Science 2 in Senior High School 3 Mojokerto. Furthermore, the results showed that from the three aspects of students worksheet which were content, presentation and language were categorized to be very feasible with the percentage 91.88%;93.55%;86.67 % . The students activities and responses were the data that obtained through the limited trials with the percentage 97.62% and 88.02% of each. Moreover, the increasing of the students creative thinking skills and learning outcomes can be seen from the N-Gain value which were 0.74 and 0.75, and belonged to high category. Based on the results it can be concluded that the students worksheet with a mind mapping strategy was feasible and able to improve the students creative thinking skills and learning outcomes on stoichiometry material

Pelatihan Penyusunan LKPD Eksperimen Sederhana untuk Guru Kimia Sampang Jawa Timur Bertha Yonata; Utiya Azizah; Mitarlis Mitarlis
ABDI: Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol 4 No 1 (2022): Abdi: Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Labor Jurusan Sosiologi, Fakultas Ilmu Sosial, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/abdi.v4i1.225

Technological developments must be followed by all lines of education even with limited facilities and infrastructure. Educators need to prepare themselves with technological advances such as in internet-assisted learning so that learning can be interesting and contextual. The occurrence of events that cause face-to-face learning in conventional classes cannot be implemented must be handled wisely and appropriately. This requires appropriate skills, including laboratory activities. If laboratory activities, especially in chemistry subjects, are not carried out at all, they will not achieve the competence of higher order thinking skills (including critical and creative thinking skills) and laboratory activity skills. However, not all chemistry teachers in Sampang Regency, East Java have experience developing experimental worksheets, even though they have experience in developing worksheets that contain a collection of questions. For this reason, training is needed for teachers who will prepare simple experimental worksheets that support distance learning or blended learning. LKPD that helps higher order thinking skills is important to help teachers guide students not only to fulfill laboratory skills but also to prepare students with higher order thinking skills. This is also a demand for the curriculum in Indonesia (K13). The use of tools and materials that are easily found around students in simple chemistry experiments will help students achieve basic competencies. The training will be held online from July to August 2021. The training participants as many as 12 chemistry teachers participated in the training with the final result being the development of a simple experimental chemistry worksheet. All participants responded positively to this training activity and wanted the training activities to be carried out for other topics.

PEMANFAATAN INDIKATOR ALAM DALAM MEWUJUDKAN PEMBELAJARAN KIMIA BERWAWASAN GREEN CHEMISTRY Mitarlis Mitarlis; Utiya Azizah; Bertha Yonatha
Jurnal Penelitian Pendidikan IPA Vol. 3 No. 1 (2018): Juni 2018
Publisher : Perkumpulan Pendidik IPA Indonesia (PPII)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jppipa.v3n1.p1-7

Telah dilakukan penelitian pengembangan bahan ajar mata kuliah Kimia Dasar dengan wawasan green chemistry. Kimia sebagai ilmu yang berdasarkan eksperimen, tidak lepas dari aktivitas laboratorium yang membutuhkan bahan kimia, yang biasanya didapatkan dari industri bahan kimia. Sebenarnya kimia sangat dekat dengan kehidupan keseharian siswa. Oleh karena itu pembelajaran kimia dirancang dengan memanfaatkan produk alami disekitar siswa. Salah satunya dengan memanfaatkan beberapa jenis tanaman atau bunga berwarna yang ada disekitar kehidupan siswa sebagai indikator asam dan basa alami. Metode penelitian menggunakan rancangan penelitian pengembangan (R&D). Hasil penelitian menunjukkan bahwa pemanfaatan produk alami terbarukan sebagai pendukung pembelajaran dapat memenuhi salah satu prinsip green chemistry yaitu "penggunaan bahan baku terbarukan". Dalam penelitian ini beberapa bunga berwarna diidentifikasi dan berpotensi dimanfaatkan sebagai indikator asam basa alami dalam pembelajaran kimia antara lain bunga pacar air dan Ruellia. Dengan menggunakan bahan alami dapat menjaga keberlanjutan proses pembelajaran kimia tanpa tergantung bahan kimia buatan industri.Kata Kunci : green chemistry, pembelajaran kimia, indikator alami.

PELATIHAN PENGELOLAAN LABORATORIUM PENDIDIKAN KIMIA BAGI GURU-GURU MGMP KIMIA BLITAR Mitarlis mitarlis; Nuniek Herdyastuti
Jurnal ABDI: Media Pengabdian Kepada Masyarakat Vol. 4 No. 1 (2018)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ja.v4n1.p45-50

Community Service Activities (PKM) have been carried out regarding the management of chemical education laboratories in the form of training. The training was given to teachers of Blitar Regency MGMP members. The training activities aimed to increase teachers' knowledge about the management and management of the Chemistry Education Laboratory. The implementation method started from preparation and planning, implementation and evaluation. The results of the training showed an increase in participants' understanding of the management of chemical laboratory. Training activities can be carried out well, and receive positive responses from participants. As many as 67% of participants sent a report on the implementation of laboratory management tasks as a post test in their respective schools. Related to the implementation of the evaluation of the training showed a positive response as indicated by the dominant percentage in the positive (very good and good) total answer statements between 70-90%. Judging from its total usefulness, 89% stated that training activities were very useful and beneficial.

Student Worksheets with Scientific Literacy Oriented on Hydrolysis Matter by Utilizing Surrounding Materials as an Alternative Practicum in Pandemic Era Gayatri Rajadewi Mega Putri; Mitarlis Mitarlis
Journal of Educational Sciences Vol 5, No 3: July 2021
Publisher : Universitas Riau

Student worksheets are needed to support the learning process that improves student's scientific literacy ability. This study aims to determine the feasibility of student worksheets with science literacy oriented on hydrolysis matter by utilizing surrounding materials as an alternative practicum activity in pandemic era. Research design was used the 4-D model limited to the developing stage with nine students of senior High School as research subjects. The student worksheet's feasibility is viewed from three aspects: validity, practicality, and effectiveness. The student worksheets that developed is feasible if it gets ≥ 61% on the validity and practicality aspects and the N-gain is ≥ 0.3 for the effectiveness aspect. In the validity aspect, the score was 97.20% and 97.00% for the content and construct validity criteria, on very good category. Practicality is viewed from the student response questionnaire results that get an average percentage of 97% and it’s supported by the results of student’s activity observations that get an average percentage of 92.84% on very practical category. The effectiveness aspect in improving science literacy ability indicated by the N-gain score average of 0.88, which is in the high category. Thus the student worksheets developed is feasible for use in the learning process.

Development of Student Worksheets with Guided Inquiry Oriented on Reaction Rate Materials to Improve the Ability of Scientific Literacy of Pharmaceutical Vocational Students S. Zahrah; M. Mitarlis
Journal of Science Education Research Vol 7, No 1 (2023): J. Sc. Edu. Research
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jser.v7i1.50168

This study intends to describe the feasibility of student worksheets with guided inquiry-oriented reaction rate materials to improve the ability of scientific literacy of pharmaceutical vocational students. Development research methods using 4D methods defining, designing, developing, and disseminating with limited only to the developing stage. The limited test was conducted on 22 students of class XI Pharmacy Vocational High School Bina Husada Pamekasan. Instruments in this study include study sheets, validation sheets, response questionnaires and observation sheets of learner activity, and pretest post-test sheets. The results showed that the feasibility of the student worksheet developed, which is suitable for use, includes the validity of the student worksheet in terms of aspects of content, presentation, language, and graphics, obtaining consecutive percentages of 78%, 78%, 90%, and 93% with valid / very valid categories. The practicality of the student worksheets developed is practically used by reviewing the results of student responses of 98% and the results of observation of student activities by 93% with very practical categories. The effectiveness of student worksheets developed effectively by looking after learning obtained a percentage of 100% with the complete category and an average N-gain score of 0.73 with a high category.

Co-Authors ., Nuzula Nuruska Achmad Lutfi AINURROHMAH, ANADHOFA Amelia Wulandari Anis Sulistiyanah Anisatul Ma'sumah AYU WARDANI, DYAH Bertha Yonata Bertha Yonata Bertha Yonatha Dian Novita El-Haqq, Wildan Takhis Endah Suwarni ERDI DAMARA, RISNAWANG Evie Ratnasari1 Fathimah, Aurellia Inin Gayatri Rajadewi Mega Putri Hanania, Vinancia Eka HAYUNINGTYAS PERMATASARI, AJENG Hidayatullah, Wahyu Nur Hikma Wardani Imtikhana Nur Khofifah ISMONO ISMONO Magfiroh, Hasna Aulia Maimun, Rozanah Miftakhul Janah Muchlis Mulyasari, Yuyun Nuniek Herdyastuti Nuniek Herdyastuti NUR HABIBAH, UMI NURUL AFIFAH, NIMAH Prasasti, Tiara Dwi Pratiwi, Karina Rike Prima Retno Wikandari PUSPA PRATIWI, INDAH Putra, M. Rizki Fadhli Putri, Gayatri Rajadewi Mega Raditya Wisnu Saputra Rahma Isfaroiny ROHMATUS SHOLIHAH, FANNY S. Zahrah Safi'i, Farhan Fikri Sukarmin Suryawan, Karina Ristya Tukiran Tukiran Ulandari, Amalia UMMAH, ZAIMATUL Utiya Azizah Utiya Azizah Wardani, Hikma Yonatha, Bertha Yuliani1 Yuni Sri Rahayu1

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