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All Journal Jurnal Kimia Mulawarman Jurnal Fisika FLUX Al-Kimia Jurnal Pengabdian Pada Masyarakat Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Jurnal Kreativitas PKM JKPK (Jurnal Kimia dan Pendidikan Kimia) Fullerene Journal of Chemistry JEDCHEM (JOURNAL EDUCATION AND CHEMISTRY) Perspektif Pendidikan dan Keguruan Hydrogen: Jurnal Kependidikan Kimia Community Education Engagement Journal Journal Of Research and Education Chemistry (JREC)
yelfira sari
Universitas Islam Riau
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Engineering Health Professions Materials Science & Nanotechnology Medicine & Pharmacology Nursing Physics Public Health Other

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PEMBUATAN DAN VALIDASI TES PENGETAHUAN KESEHATAN DAN KESELAMATAN KERJA LABORATORIUM CALON GURU KIMIA oktariani oktariani; yelfira sari; asyti febliza
JEDCHEM (JOURNAL EDUCATION AND CHEMISTRY) Vol 4 No 1 (2022): Jurnal Pendidikan, Pendidikan Kimia, dan Ilmu Kimia
Publisher : LEMBAGA PENELITIAN DAN PENGABDIAN MASYARAKAT (LPPM) UNIKS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36378/jedchem.v4i1.196

Abstract

This study was conducted to create and validate the instruments test of prechemistry teacher’s knowledge about health and safety work in laboratory. This instrument will be used to obtain information about prechemistry teacher’s knowledge about health and safety work in laboratory. This research has been conducted using Research and Development (R & D) design that was developed by adopting 4D development model consisting of 4 stages: define, design, develop and dissemination. However, this research only reached the develop stage. Data analysis was performed to test the validity and reliability of the tests. Data processing was performed using IBM-SPSS 20 software. The results of this study showed that the test was valid and was feasible to implement based on the CVI value of 0.847. The reliability test of prechemistry teacher’s knowledge about health and safety work in laboratory was obtained at 0.766, its mean that the reliability of the tests was classified as in high category. Thus this instrument can be used to determine the level of prechemistry teacher’s knowledge about health and safety work in laboratory. Although there are some parts of the instrument need to be revised again. Keywords : instrument, healthy and safety work, laboratory, reliability, validity
PEMBUATAN DAN VALIDASI TES PENGETAHUAN KESEHATAN DAN KESELAMATAN KERJA LABORATORIUM CALON GURU KIMIA oktariani oktariani; yelfira sari; asyti febliza
JEDCHEM (JOURNAL EDUCATION AND CHEMISTRY) Vol 1 No 2 (2019): Pendidikan dan Pendidikan Kimia
Publisher : LEMBAGA PENELITIAN DAN PENGABDIAN MASYARAKAT (LPPM) UNIKS

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

Abstract

Abstract This study was conducted to create and validate the instruments test of prechemistry teacher’s knowledge about health and safety work in laboratory. This instrument will be used to obtain information about prechemistry teacher’s knowledge about health and safety work in laboratory. This research has been conducted using Research and Development (R & D) design that was developed by adopting 4D development model consisting of 4 stages: define, design, develop and dissemination. However, this research only reached the develop stage. Data analysis was performed to test the validity and reliability of the tests. Data processing was performed using IBM-SPSS 20 software. The results of this study showed that the test was valid and was feasible to implement based on the CVI value of 0.847. The reliability test of prechemistry teacher’s knowledge about health and safety work in laboratory was obtained at 0.766, its mean that the reliability of the tests was classified as in high category. Thus this instrument can be used to determine the level of prechemistry teacher’s knowledge about health and safety work in laboratory. Although there are some parts of the instrument need to be revised again. Keywords : instrument, healthy and safety work, laboratory, reliability, validity
Aktivitas Antioksidan Kulit Pisang Muli (Musa acuminata linn) dan Kulit Pisang Kepok (Musa paradisiaca formatypica) Putri Ade Rahma Yulis; Yelfira Sari
Al-Kimia Vol 8 No 2 (2020): DECEMBER
Publisher : Study Program of Chemistry - Alauddin State Islamic University of Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/al-kimia.v8i2.15543

Abstract

This study examined the content of banana peel. The research began with an extraction  process then continued with phytochemical tests.  Qualitatively result showed banana peel contain quite complex secondary metabolites including flavonoids, saponins, phenolics, tannins, steroids and triterpenoids for Muli banana peels and flavonoids, saponins, phenolics, tannins, and triterpenoids for Kepok banana peels. Qualitative tests were conducted to detect total phenolic and flavonoid content using Microplate Reader.  Flavonoids averaged 19.797 mg QE / g for  Muli banana peel and for Kepok banana peel 15, 529 mg QE / g. The measurement results of the total phenolic content  of Muli banana peel was 108.336 mg GAE / g and for Kepok banana 32, 496 mg GAE / g. Antioxidant activity for Muli banana peels has an IC50 value of 27, 56 µg / ml which means it belongs to a group with high antioxidant activity and Kepok banana 479.77 µg / ml which is classified as a low antioxidant activity but still within the range of potential values as antioxidant. From this research, it is known that both  of types banana peels have the potential as raw material for developing products with high antioxidant levels  Keywords: Banana peels, antioxidants, secondary metabolites
KONTEN MATERI KIMIA DALAM STANDAR ISI PEMBELAJARAN IPA SMP BERDASARKAN K-13 oktariani oktariani; Asyti Febliza; Yelfira Sari
Perspektif Pendidikan dan Keguruan Vol 11 No 2 (2020): Perspektif Pendidikan dan Keguruan
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/perspektif.2020.vol11(2).5301

Abstract

Static achievement of Indonesian students in TIMSS, of course requires improvement efforts. One of the improvement efforts can be done by conducting further studies related to the results of Indonesia's achievements in TIMSS. The aim of this study to describe the chemistry content and the of science learning in junior high school based on K-13. This research is a descriptive study with content analysis method. Content analysis was carried out on documents related to K-13 specifically the content standards, the learning process, syllabus and science textbooks of junior high school. The results showed that there are chemistry contents in science learning of junior high school. The chemistry contents contained in science learning of junior high school is divided into 6 main subjects and 5 demands of cognitive abilities, namely C1, C2, C3, C4 and C6, while the demands of cognitive ability C5 (evaluating) are not contained in the Chemistry content in science learning of junior high school . Key words: chemistry content, cognitive demands abilities, K-13, science learning
Kepok Banana Peels as Biosorbent for Mercury Sorption from Artificial Wastewater Putri Ade Rahma Yulis; Yelfira Sari
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 7, No 1 (2022): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkpk.v7i1.56353

Abstract

The present study used adsorbents from Kepok banana peel to remove Hg (II) from artificial wastewater. Kepok banana peels are the most abundant waste from several products bananas processed. One of the ways to reduce that waste is by using it as an adsorbent. This study utilizes the adsorbent from kepok banana peels to remove Hg (II) from artificial wastewater. This is because Hg(II) is a heavy metal that is harmful A previous study showed a high amount of Hg(II) in Kuantan River, one of the River in Riau Province. The effect of initial metal concentration, adsorbent mass, and contact time was investigated to evaluate the maximum removal percentage and adsorption capacity of Kepok banana peels. The adsorption parameters studied were initial Hg (II) concentration [6.84, 7.02,8.38, and 10.05 mg/L],  adsorbent mass [10,20,30 and 40 g], and contact time variations (3,5,7 and 9 hours) where the operating conditions were 250 ml of Hg metal solution was added to each adsorbent. FTIR spectra of adsorbent showed hydroxyl, carboxylic, and amine groups in Kepok banana peels. The adsorption process found that the metal concentration variation under 6.84 mg/L initial Hg (II) concentration conditions gave the highest removal percentage of 99.7 %  and the highest adsorption capacity of 0,0758 mg/g under the condition of 10.05 mg/L  initial Hg (II) concentration. Then at adsorbent mass variation, the highest removal percentage was 94.8 % with 40 grams adsorbent mass, and the highest adsorption capacity was 0.1587 mg/g when using 10 grams adsorbent. The contact time variations gave the highest removal percentage, 95.2 %, and the highest adsorption capacity, 0.0542 mg/g, during contact for 5 hours. This study showed that Kepok banana peels had good potential for removing Hg (II) ions and could be used as a good adsorbent for removing the Hg (II) from wastewater. . 
Uji Efektivitas Beberapa Pelarut Pada Proses Identifikasi Metabolit Sekunder Kulit Pisang (Musa Paradisiaca) Secara Kualitatif Putri Ade Rahma Yulis; Yelfira Sari; Desti Desti
Jurnal Kimia Fullerene Vol 5 No 2 (2020): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v5i2.196

Abstract

Kulit pisang mengandung komponen aktif yang dapat dijadikan bahan baku pengembangan produk berpotensi antioksidan, selain itu dapat mengatasi pencemaran limbah kulit pisang. Pada penelitian ini dilakukan uji efektivitas beberapa jenis pelarut polar dan non polar dalam mengidentifikasi metabolit sekunder pada simplisia kulit pisang .Dengan tujuan menjadi landasan bagi penelitian lainnya dalam proses ekstraksi kulit pisang, sehingga akan didapatkan kandungan senyawa aktif dalam jumlah maksimal jika pelarut yang digunakan dapat menarik komponen aktif dengan optimal. Penelitian ini menggunakan empat jenis pelarut yakni etanol, metanol, etanol dicampur aseton, dan n-heksan. Kemudian keefektifan nya dilihat dari kemampuannya dalam mengidentifikasi metabolit sekunder pada simplisia kulit pisang. Hasil penelitian ini menunjukan ketiga jenis pelarut yakni, metanol, etanol dan campuran etanol dan aseton dapat mengidentifikasi metabolit sekunder kulit pisang , namun pelarut n-heksan tidak dapat mengidentifikasi metabolit sekunder kulit pisang. Kemudian dari ketiga pelarut tersebut yang mempunyai efektivitas paling besar adalah metanol. Metanol dapat mengidentifikasi empat jenis metabolit sekunder yakni flavonoid, fenolik, tanin dan saponin dengan lebih cepat dan menunjukan perubahan warna yang lebih signifikan. Berdasarkan hasil ini dapat dikatakan bahwa simplisia kulit pisang berpotensi antioksidan karena positif mengandung beberapa metabolit sekunder dan untuk mendapatkan ekstrak yang maksimal dapat digunakan metanol sebagai pelarut untuk proses ekstraksi
Sosialisasi dan Edukasi Pemanfaatan Limbah Kulit Pisang sebagai Masker Wajah Alami Kaya Antioksidan di Kecamatan Marpoyan Damai, Pekanbaru Putri Ade Rahma Yulis; Yelfira Sari; Desti Desti
Jurnal Pengabdian Pada Masyarakat Vol 4 No 4 (2019)
Publisher : Universitas Mathla'ul Anwar Banten

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (543.489 KB) | DOI: 10.30653/002.201944.195

Abstract

SOCIALIZATION AND EDUCATION ON THE UTILIZATION OF BANANA SKIN WASTE AS ANTIOXIDANT-RICH NATURAL FACE MASKS IN MARPOYAN DAMAI DISTRICT, PEKANBARU. The fact at this time is the increasing level of consumer consumption of beauty products. It does not only occur among adult women but also teenager. But the consumptive level not accompanied by purchasing power of quality products. Based on interviews with residents of the village of East Sidomulyo, most of the citizens are among adult women and teenagers that they mostly use ready-made masks that are sold in the market because it is more practical and faster in the process of use without considering the possibility of its contents which are harmful to skin health. The problem of the partners is to encourage service in the form of socialization and education to the local community to be able to take advantage of the banana peel waste that is widely available in the environment because it is now became popular a variety of processed banana products, but in terms of waste has not been utilized at all. This education is based on several studies that banana peels contain high antioxidants so it is very good if it can be processed as a mask for a facial skin care. In addition, the utilization of waste will be able to reduce pollution that might occur in the environment due to banana peels that are not treated. The existence of this activity was very welcomed by residents, this can be seen from the enthusiasm of residents asking questions regarding the problems presented and the impression of some residents who want this activity to be carried out continuously, so that more people feel the benefits and they are very enthusiastic to directly apply the knowledge.
PEMANFAATAN LIMBAH KULIT PISANG KEPOK (Musa acuminata × balbisiana) SEBAGAI MEDIA FILTRASI PENINGKATAN KUALITAS AIR (TINGKAT KEJERNIHAN AIR, NILAI pH DAN TDS) Putri Ade Rahma Yulis; Yelfira Sari; Desti Desti
Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Vol 4, No 2 (2021): (November) Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia
Publisher : Universitas Islam Kalimantan MAB Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (501.519 KB) | DOI: 10.31602/dl.v4i2.5932

Abstract

Berdasarkan hasil pendataan oleh Badan Pusat Statistik (BPS) bahwa pencemaran terbesar adalah pencemaran air, diikuti pencemaran udara dan tanah. Salah satu penyebab pencemaran air tersebut berasal dari limbah rumah tangga dan limbah industri. Atas dasar permasalahan tersebut penelitian ini bertujuan meningkatkan kualitas fisik air dengan memanfaatkan limbah kulit pisang. Untuk proses penelitian yang dilakukan adalah air limbah difiltrasi menggunakan serbuk simplisia kulit pisang kepok dengan variasi jumlah media filtrasi dan waktu filtrasi. Hasil yang diperoleh terjadi peningkatan tingkat kejernihan air limbah dari warna kecoklatan menjadi bening. Untuk nilai pH dan TDS pada variasi jumlah media filtrasi yaitu dari pH awal 4,9 dan TDS 477 mg/L menjadi pH 5,7 dan TDS 316 mg/L (filtrasi 30 g kulit pisang), pH 6,3 dan TDS 310 mg/L (filtrasi 50 g kulit pisang), pH 6,6 dan TDS 333 mg/L (filtrasi 70 g kulit pisang), pH 6,9 dan TDS 348 mg/L (filtrasi 90 g kulit pisang). Kemudian untuk variasi waktu filtrasi didapatkan hasil yaitu pH 5,3 dan TDS 409 mg/L (filtrasi 3 jam), pH 5,5 dan TDS 342 mg/L (filtrasi 5 jam), pH 6,3 dan TDS 314 mg/L (filtrasi 7 jam), pH 6,6 dan TDS 303 mg/L (filtrasi 9 jam ). Berdasarkan data perubahan pH dan TDS serta tingkat kejernihan air tersebut dapat disimpulkan bahwa kulit pisang kepok mempunyai efektivitas cukup tinggi dan berpotensi sebagai biosorben ramah lingkungan dan dapat dikembangkan lebih lanjut dengan proses aktivasi dan uji parameter lainnya untuk mengurangi dampak pencemaran lingkungan.
UJI KUALITAS AIR TANAH DARI KADAR TDS, ION SO42- DAN NO3- DI KECAMATAN KUBU BABUSSALAM, ROKAN HILIR arief yandra putra; Yelfira Sari
Journal of Research and Education Chemistry Vol. 1 No. 2 (2019): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (579.439 KB) | DOI: 10.25299/jrec.2019.vol1(2).3498

Abstract

Air tanah memiliki peran yang sangat penting karena menjadi sumber utama untuk memenuhi kebutuhan pokok orang banyak. Air tanah dalam siklus hidrologi melibatkan beberapa aspek yang mempengaruhi ketersediaan air tanah di suatu daerah. Pada, kondisi sekarang masalah yang paling utama adalah sumber daya air. Beberapa kegiatan berdampak negatif terhadap penurunan kualitas air yang berasal dari kegiatan industri, domestik dan kegiatan lainnya. Tujuan dari penelitian ini adalalah untuk menganalisis kualitas air tanah di kecamatan Kubu Babussalam, Kabupaten Rokan Hilir, Provinsi Riau yang ditinjau dari parameter kadar TDS, Ion Sulfat dan Ion Nitrat. Proses pengambilan sampel menggunakan teknik random sampling. Berdasarkan hasil uji yang dilakukan terhadap kandungan TDS, Ion sulfat dan ion nitrat berada dibawah ambang batas baku mutu yang ditetapkan oleh Peraturan Menteri kesehatan No: 416/MEN.KES/PER/IX/1990.
PENENTUAN KUALITAS FISIKA (WARNA, SUHU, DAN TDS) DARI SAMPEL AIR SUMUR WARGA DI KECAMATAN DUMAI TIMUR Yelfira Sari; Arief Yandra Putra
Journal of Research and Education Chemistry Vol. 1 No. 2 (2019): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (581.19 KB) | DOI: 10.25299/jrec.2019.vol1(2).3512

Abstract

Water quality can be determined by doing certain test. Common parameter for determination water quality was physical, chemical, and biological parameter. This research was determined physical parameter, such as water colour, temperature, and TDS. Water colour determination was using eyesight sense while for temperature and TDS using a tool, thermometer for temperature determination and TDS-meter for TDS determination. Samples were taken from 5 Kelurahan in Dumai Timur District, that is Kelurahan Bukit Batrem, Kelurahan Buluh Kasap, Kelurahan Jaya Mukti, Kelurahan Tanjung Palas, and Kelurahan Teluk Binjai. Samples was taken from citizen wells which was selected in random as many as 2 samples for each Kelurahan. Water quality from samples was measured based on Regulation of Minister for Public Health No:416/MEN.KES/PER/IX/1990. Result of this research showed that all of water sample from Dumai Timur District were improper in physical parameter because of the water were turbid.
Co-Authors Arief Yandra Putra Asyti Febliza Asyti Febliza Desti Desti Desti Desti Evi Pamayanti Imam Ardiansyah Mellisa Mellisa Nilam Cahaya Nurkhairo Hidayati oktariani oktariani Prilla Amnestiya Putri Ade Rahma Yulis Putri Nabila Sumandar