Article Per Year (5 Year)
p-Index From 2019 - 2024
1.944
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan Kimia Universitas Riau Indonesian Journal of Chemical Science and Technology Journal Of Human And Education (JAHE)
Rini Selly, Rini
Unknown Affiliation
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Social Sciences Other

Published : 13 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 13 Documents
Search

 1   2 
PENGARUH PENERAPAN MODEL PEMBELAJARAN POGIL TERHADAP MINAT DAN HASIL BELAJAR SISWA BERBANTUAN MEDIA VIDEO ANIMASI POWTOON PADA MATERI KESETIMBANGAN KIMIA Manullang, Ribka Sopia; Selly, Rini; Tarigan, Simson; Jasmidi, Jasmidi; Juniar, Anna 
Jurnal Pendidikan Kimia Universitas Riau Vol 9, No 2 (2024)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan (FKIP), Universitas Riau (UNRI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33578/jpk-unri.v9i2.7968

Abstract

Ilmu kimia merupakan salah satu ilmu yang sulit dipahami siswa salah satu materi nya adalah kesetimbangan kimia. Kegiatan pembelajaran yang bersifat berpusat kepada guru sehingga siswa kurang aktif mengikuti pembelajaran. Kegiatan tersebut mengakitbatkan kurangnya minat belajar siswa hal tersebut ditandai dengan kurang aktifnya siswa dalam proses pembelajaran sehingga keadaan tersebut berpengaruh terhadap hasil belajar siswa. Penelitian ini menggunakan dua sampel kelas yang dipilih dengan menggunakan Teknik purposive sampling dengan masing – masing kelas terdiri dari 32 siswa. Desain penelitian yang digunakan adalah pretest dan postest yang melibatkan kelas eksperimen dan kontrol. Instrumen test yang digunakan pada penelitian ini adalah 20 soal pilihan berganda dan instrument non tes berupa angket minat belajar sebanyak 20 pernyataan. Untuk uji hipotesis digunakan uji t pihak kanan dan uji korelasi product moment. Dari hasil penelitian diperoleh nilai pada hipotesis 1 yaitu thitung > ttabel dimana harga thitung sebesar 11,02 dan ttabel 2,04 dan pada hipotesis ke II thitung sebesar 13,33 dan ttabel sebesar 2,04 hal ini menunjukkan bahwa adanya pengaruh model pembelajaran POGIL terhadap minat dan hasil belajar siswa berbantuan media video animasi powtoon pada mteri kesetimbangan kimia, sedangkan untuk uji hipotesis III diperoleh nilai thitung > ttabel dengan harga 0,63 > 0,34 sehingga hal ini menunjukkan bahwa minat belajar siswa dengan hasil belajar siswa memiliki korelasi dengan kategori yang tinggi.
PENGARUH MODEL PEMBELAJARAN LEARNING CYCLE 5E BERBANTUAN MEDIA I-SPRING TERHADAP HASIL DAN MINAT BELAJAR SISWA PADA MATERI KESETIMBANGAN KIMIA Simarmata, Tiomelda; Selly, Rini; Sari, Sri Adelila; Jasmidi, Jasmidi; Zubir, Moondra 
Jurnal Pendidikan Kimia Universitas Riau Vol 9, No 2 (2024)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan (FKIP), Universitas Riau (UNRI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33578/jpk-unri.v9i2.7967

Abstract

Pelajaran kimia merupakan salah satu ilmu pengetahuan yang susah dipahami karena teori yang dipelajari bersifat abstrak, banyak menggunakan rumus dan perhitungan, salah satunya pada materi kesetimbangan kimia. Penerapan kegiatan pembelajaran masih bersifat teacher centered yang menyebabkan siswa kurang aktif ketika proses belajar mengajar. Ketika pembelajaran berlangsung, siswa juga dinilai memiliki minat belajar yang rendah. Hal ini ditandai dari sikap siswa yang cenderung pasif dan kurang berperan saat proses pembelajaran. Penelitian ini bertujuan untuk mengetahui pengaruh model pembelajaran Learning Cycle 5E berbantuan media I-Spring terhadap hasil dan minat belajar siswa SMA kelas XI pada materi kesetimbangan kimia. Penelitian ini menggunakan dua sampel yang dipilih menggunakan teknik purposive sampling yaitu kelas XI IPA 1 dan XI IPA 2 dimana masing-masing kelas terdiri dari 34 siswa. Desain penelitian yang digunakan adalah pretest-posttest kontrol grup design yang melibatkan kelas eksperimen dan kelas kontrol. Instrumen yang digunakan dalam penelitian ini adalah instrumen tes berupa soal pilihan berganda berjumlah 20 soal dan instrumen non tes berupa angket minat berjumlah 20 pernyataan. Untuk uji hipotesis menggunakan uji t pihak kanan dan uji korelasi product moment. Dari hasil penelitian diperoleh nilai pada uji hipotesis I yaitu t hitung > t tabel dimana harga t hitung sebesar 11,839 dan t tabel 1,996 dan pada uji hipotesis II, t hitung sebesar 11,339 dan t tabel sebesar 1,996. Hal ini menunjukkan adanya pengaruh model pembelajaran Learning Cycle 5E berbantuan media I-Spring terhadap hasil dan minat belajar siswa SMA kelas XI pada materi kesetimbangan kimia.
Pelatihan Penggunaan KIT IPA Bagi Guru dan Siswa di SMP IT Nurul Fadhilah Bandar Setia, Percut Sei Tuan, Deli Serdang Sumatera Utara Selly, Rini; M., Zainuddin; Jasmidi, Jasmidi; Ahsan, Jabal
Journal Of Human And Education (JAHE) Vol. 4 No. 4 (2024): Journal Of Human And Education (JAHE)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jh.v4i4.1225

Abstract

Pembelajaran IPA merupakan salah satu model penerapan kurikulum yang dianjurkan untuk diterapkan mulai pada pendidikan dasar. Materi dari pembelajaran IPA sebaiknya diaktualisasikan melalui peragaan, bentuk percobaan atau demonstrasi yang dilakukan di Laboratorium. Pelaksanaan praktikum IPA dengan KIT praktikum menjadi lebih mudah dan dapat mengurangi risiko kecelakaan laboratorium. Salah satu tugas pendidik adalah mengembangkan potensi siswa namun permasalahan yang dihadapi guru adalah belum bisa berinovasi supaya proses pembelajaran IPA dilaksanakan di Laboratorium saat mendapatkan materi yang semestinya dilakukan dengan metode praktikum. Guru-guru di SMP IT Nurul Fadhilah selama ini melakukan proses peembelajaran hanya sebatas teori di dalam kelas, hal ini dikarenakan keterbatasan akses dan peralatan belum memadai yang menunjang praktikum IPA. Hal ini dirasakan oleh guru saat berinteraksi dengan siswa memberikan contoh penerapan praktikum IPA yang hanya sebatas teori. Pelatihan ini bertujuan untuk membekali guru dan siswa dalam mengembangkan kreativitasnya dalam mengintegrasikan penggunaan KIT IPA pada pembelajaran IPA dan metode praktikum akan membantu mempercepat pemahaman terhadap pembelajaran IPA serta memberikan langkah kongkret dalam pemanfaatan laboratorium sebagai tempat belajar yang menyenangkan.
Synthesis And Characterization of Activated Carbon/Alginate/Nanocellulose-Fe Composite as Slow Release Fertilizer Cahyati, Riska; Syahirah, Atikah nur; Rahmah, Siti; Muchtar, Zainuddin; Jasmidi, Jasmidi; Pulungan, Ahmad Shafwan; Zubir, Moondra; Selly, Rini; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62307

Abstract

Fe deficiency in plants results in yellowing of leaves on plants and also reduces the quality of fruit produced. Fe deficiency in plants can be treated by applying slow release fertilizer which will release the nutrients in the fertilizer slowly according to plant needs so that there will be no problem of deficiency or excess of Fe. Activated Carbon/Alginate/Nanocellulose-Fe Composite can be used as slow release fertilizer because this composite releases Fe slowly with citric acid medium and tested with AAS. The functional groups in the Activated Carbon/Alginate/Nanocellulose-Fe Composite showed no disappearance of the functional groups belonging to activated carbon, alginate or nanocellulose so that it can be said that these three components were successfully made into composites and can be carriers of nutrients in micro-fertilizers.
Synthesis and Characterization of Activated Carbon/Alginate/Nanocellulose-Cu Composites Syahirah, Atikah Nur; Jasmidi, Jasmidi; Muchtar, Zainuddin; Rahmah, Siti; Pulungan, Ahmad Shafwan; Zubir, Moondra; Selly, Rini; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62303

Abstract

OPEFB is one source of natural fiber-based composites which have the potential to become activated carbon and nanocellulose. This study aims to synthesize and characterize the activated carbon/alginate/nanocellulose-Cu composite. The characterization used in this study is FTIR and PSA. The synthesis of activated carbon/alginate/nanocellulose-Cu composites began with a process of carbonization and activation with H3PO4 to produce Activated Carbon. Followed by a bleaching process with NaClO2 and a delignification process with Na2SO3 and NaOH to produce Nanocellulose. Alginate using commercial alginate. Furthermore, the three ingredients were mixed until homogeneous and put into a 0.1M CuSO4 solution to produce beads. The results of the characterization of characterization of PSA Nanocellulose obtained a particle size of 41.05 nm and the result of FTIR characterization on the activated carbon/alginate/nanocellulose-Cu composite contained the functional group OH group, triple C bond from stretching alkyne, C=C aromatic group, C-H alkane group, C-O group, the P=O stretching vibration of the P-O-C group and the alcohol OH group expressing the active carbon; there are functional groups of hydroxyl (OH), carboxyl, carbonyl, and C-O-C and –COOH bonds which represent alginate and there are OH functional groups, stretching C-H bonds, C-O stretching, stretching C-C, and β- glucosidic bonds between glucose units which indicate nanocellulose.
Adsorption of Soluble Ammoniac Using A Porous Polymer Composite Cu-(TAC) And Activated Carbon Empty Fruit Palm Oil Maulina, Rissah; Selly, Rini; Nasution, Hafni Indriati; Jasmidi, Jasmidi; Zubir, Moondra; Rahmah, Siti; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62308

Abstract

This study aims to determine the stages in the process of making activated carbon, synthesis of porous polymer composites Cu(TAC) and activated carbon composites (KA-Cu(TAC) for adsorption of dissolved ammonia (NH4OH). To know the characterization results of activated carbon and KA- Cu(TAC), as well as knowing the optimum mass, concentration, and contact time of activated carbon KA-Cu(TAC) for the adsorption of dissolved ammonia. The research stages started from Empty Oil Palm Bunches (EFB) used as biosorbents for carbon production at 500oC. The resulting product was activated with H3PO4, then modified with porous polymer Cu(TAC) to make a composite. The KA-Cu(TAC) composite was synthesized by reflux method. Then MOFs, activated carbon and KACu(TAC) composite were characterized by BET. The BET characterization results showed that the successfully synthesized KA-Cu(TAC) composite experienced an increase in surface area.In the NH4OH adsorption process the optimum mass efficiency on activated carbon still increased at 8 grams while the KA-Cu(TAC) composite obtained an efficiency of 36, 6% and optimally at a mass of 4 g. At variations in concentration, the efficiency of the two samples still decreased. And the optimum time efficiency obtained in the NH4OH adsorption process with activated carbon was 70% and the KA-Cu(TAC) composite was 86.6%, both samples were equally optimal at 75 minutes.
Adsorption Equilibrium Properties of Zn(II) on Activated Carbon Composite of Derived Empty Palm Oil Fruit Bunches with Metal Organic Frameworks Cu(TAC) Jasmidi, Jasmidi; Zubir, Moondra; Selly, Rini; Pulungan, Ahmad Shafwan; Faradilla, Putri; Rahmah, Siti; Tanjung, Amar Lohot
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 7, No 2 (2024): JULY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i2.62250

Abstract

This study aims to determine the adsorption equilibrium of the activated carbon of empty palm oil fruit bunches and KA-Cu(TAC) on Zn(II). Oil palm empty fruit bunches are used as a bio-sorbent in making carbon at a temperature of 5000 C, the resulting carbon is activated using H3PO4 and modified into a composite with metal organic frameworks of Cu metal and terephthalic acid. MOFs and KA-Cu(TAC) composites were produced by reflux method. Activated carbon, MOFS and KA-Cu(TAC) were characterized using XRD. The adsorption process of Zn(II) metal was analyzed using AAS and determined the optimum conditions with various concentrations to determine the adsorption equilibrium. XRD characterization results show that activated carbon has an amorphous structure, while MOFs Cu(TAC) and KA-Cu(TAC) have a crystalline structure. The optimum condition of activated carbon and KA-Cu(TAC) at a concentration of 180 ppm with the appropriate adsorption isotherm model is the Langmuir isotherm.
Adsorption of Heavy Metal Cu(II) in Wastewater Using Adsorbents from Empty Oil Palm Bunches Fitri, Indah; Nasution, Hafni Indriati; Jasmidi, Jasmidi; Zubir, Moondra; Rahmah, Siti; Selly, Rini; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62304

Abstract

Heavy metal pollution has increased with increasing industrialization. To overcome this contamination, carried out by using the adsorption method. The adsorbents used are activated carbon and porous polymer composite carbon Cu(TAC). in liquid waste, one of which is Cu metal. This is evidenced by the existence of data showing the efficiency of activated carbon and porous polymer composite carbon Cu(TAC) above 90%. In addition, activated carbon and porous polymer composite carbon Cu(TAC) have an adsorption isotherm equation that is suitable for Cu(II) adsorption is the Langmuir isotherm with linear regression values of 0.9045 and 0.8912.
Adsorption Properties of Beta Carotene from Activated Carbon Derivatives of Oil Palm Empty Bunches Jasmidi, Jasmidi; Zubir, Moondra; Selly, Rini; Faradilla, Putri; Rahmah, Siti
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 7, No 1 (2024): JANUARY 2024
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v7i1.62260

Abstract

This research aims to determine the adsorption ability of activated carbon and Fe-Cu modified activated carbon in the β-carotene adsorption process on Crude Palm Oil (CPO). Empty Palm Oil Bunches (TKKS) are used as a bio-sorbent for carbon production at a temperature of 500 ºC. The synthesized carbon was activated using H3PO4 and modified with Fe-Cu metal. CPO quality parameters such as Free Fatty Acids and Peroxide Number were analyzed to see the effect of adsorption on CPO quality. The β-carotene level in the CPO sample used is 472.1 ppm. The optimum conditions for using activated carbon in the β-carotene adsorption process are a mass variation of 8 grams with the β-carotene remaining after adsorption being 432.4 ppm, whereas by using Magnetic Activated Carbon, CPO β-carotene after adsorption remains at 426.1 ppm. Meanwhile, increasing the adsorption time causes the absorption of β-carotene to become greater. By using Activated Carbon the remaining β-carotene is 300.1 ppm after 120 minutes, whereas by using Magnetic Activated Carbon the optimum absorption time is faster and the amount of β-carotene absorbed is greater. The remaining βcarotene after absorption with Magnetic Activated Carbon was 288.7 after 90 minutes of adsorption. Apart from being able to absorb β-carotene, magnetic activated carbon is also better at reducing FFA and PV levels from CPO.
Synthesis of Cu-(TAC) Composite with Oil Palm Empty Fruit Bunch Waste Activated Carbon Through the Adsorption Mechanism of βCarotene Sari, Lidia Mutia; Jasmidi, Jasmidi; Nasution, Hafni Indriati; Zubir, Moondra; Rahmah, Siti; Selly, Rini; Faradilla, Putri
Indonesian Journal of Chemical Science and Technology (IJCST) Vol 6, No 2 (2023): JULY 2023
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/ijcst.v6i2.62305

Abstract

This study aims to determine the adsorption and desorption abilities of activated carbon and Cu-(TAC) composites in the β-carotene adsorption process on Crude Palm Oil (CPO). Oil Palm Empty Fruit Bunches (EFB) are used as activated carbon and modified with MOFs Cu-(TAC). Activated carbon and Cu-(TAC) composites were characterized by XRD, SEM-EDX, and BET. The concentration of β-carotene absorbed during the adsorption process was analyzed using a UV-Vis spectrophotometer. The variations used to determine the optimum conditions for absorption of β-carotene were the mass variation of the adsorbent and the variation in the contact time between the adsorbent and adsorbate. The results of the characterization of activated carbon showed a sharp absorption in the presence of O-H, C-H and C-O groups indicating the presence of cellulose. Activated carbon is amorphous and the Cu-(TAC) composite has a crystal structure and its pore size is mesoporous. The optimum conditions for the use of activated carbon for β-carotene adsorption were the mass variation of 8 grams with 0.495 ppm of β-carotene and contact time at 120 minutes with 2.605 ppm of β-carotene. The optimum condition of the Cu-(TAC) composite in the β-carotene adsorption process was at 4 gram mass variation with 1.026 ppm β-carotene content and optimum contact time at 60 minutes with 6.384 ppm β-carotene content. The ability of desorption can be seen from the percentage of desorption showing activated carbon in the 150th minute with 96.252% while in the Cu-(TAC) composite in the 30th minute with 88.188%.
Co-Authors Ahsan, Jabal Br. Gurusinga,, Dinda Natalisa Cahyati, Riska Faradilla, Putri Fitri, Indah Jasmidi Jasmidi Juniar, Anna  Khairunissa, Dira M., Zainuddin Manalu, Santa Maria Manullang, Ribka Sopia Maulina, Rissah Nasution, Hafni Indriati Panjaitan, Angel Shylvia Panjaitan, Teguh Hidayat Pulungan, Ahmad Shafwan Sari, Lidia Mutia Sari, Maya Novita Simarmata, Tiomelda Simson Tarigan Siti Rahmah Sri Adelila Sari Syahirah, Atikah Nur Tanjung, Amar Lohot Zainuddin Muchtar Zubir, Moondra Zubir, Moondra