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All Journal Komunikasi Fisika Indonesia Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya Phi : Jurnal Pendidikan Fisika dan Terapan Jurnal Fisika Unand JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX JISTech (Journal of Islamic Science and Technology) PASCAL (Journal of Physics and Science Learning)
Miftahul Husnah
Universitas Islam Negeri Sumatera Utara
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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The Influence of Microwave on Reduced Graphene Oxide (rGO) Crystallinity from Inorganic Waste Lailatul Husna Lubis; Miftahul Husnah
Jurnal Phi Jurnal Pendidikan Fisika dan Fisika Terapan Vol 2, No 2 (2021)
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/p-jpft.v2i2.10211

Abstract

The synthesis of reduced graphene oxide was carried out using the smoke catcher method and inorganic waste. The inorganic waste smoke obtained became the basic material as a carbon source. After burning the inorganic waste, the smoke collected was in the form of a powder and exposed to microwaves. Based on FTIR characterization, the synthesis was successfully carried out by obtaining ~ 1600 cm-1 as the peak of the aromatic functional group (C = C) or graphene functional group. After the inorganic waste smoke sample was put in the microwave, the rGO sample was obtained which had a higher crystallinity than before heating in the microwave.
HUBUNGAN TINGKAT BERPIKIR KRITIS TERHADAP HASIL BELAJAR FISIKA SISWA DENGAN MENERAPKAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING Miftahul Husnah
PASCAL (Journal of Physics and Science Learning) Vol 1, No 2 (2017)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.044 KB)

Abstract

Kemampuan berpikir kritis merupakan aspek yang sangat penting yang harus dimiliki oleh siswa dalam pembelajaran fisika, terutama dalam memecahkan permasalahan-permasalan yang membutuhkan alternatif pemecahan yang lebih mendalam yang sebenarnya tidak jauh dari permasalahan yang kita temui dalam kehidupan sehari-hari. Penelitian ini bertujuan untuk menganalisis hubungan setiap tingkat berpikir kritis terhadap hasil belajar fisika siswa. Pada penelitian ini siswa dibagi atas 3 kelompok, yaitu berpikir kritis tinggi, menengah, dan rendah. Dari hasil regresi diperoleh berpikir kritis memiliki hubungan fungsional yang signifikan terhadap hasil belajar fisika siswa pada kelompok tinggi dan menengah atau F(hitung)>F(tabel) untuk kedua kelompok tersebut, hal ini berbeda untuk kelompok tingkat berpikir kritis rendah dimana F(hitung)>F(tabel) (0,082 < 5,12) yang artinya tidak terdapat hubungan fungsional yang signifikan antara variabel berpikir kritis rendah dengan variabel hasil belajar dengan menerapkan model problem based learning (PBL) atau menunjukkan bahwa tidak memberikan pengaruh yang signifikan aspek berpikir kritis rendah terhadap hasil belajar yang diperoleh siswa. Kontribusi atau sumbangan berpikir kritis tinggi dengan hasil belajar fisika siswa untuk setiap kelompok berturut-turut adalah sebesar 85,0%, 40,7%, dan 1% sedangkan sisanya (residunya) dijelaskan oleh variabel lain yang tidak diteliti. Berdasarkan hasil analisis maka diketahui bahwa tingkat berpikir kritis siswa secara keseluruhan memiliki hubungan fungsional yang signifikan terhadap hasil belajar dengan nilai R square 0,827 atau 82,7% sumbangan berpikir kritis siswa terhadap hasil belajar yang menerapkan model PBL. Semakin tinggi tingkat berpikir kritis siswa maka semakin besar hubungan fungsional yang signifikan terhadap hasil belajar, dan juga semakin besar kontribusi/sumbangan berpikir kritis terhadap hasil belajar yang diperoleh siswa yang menerapkan model PBL. Tidak terdapat hubungan fungsional yang signifikan pada kelompok berpikir kritis rendah dengan variabel hasil belajar yang menerapkan model PBL. Kata Kunci : Berpikir kritis, hasil belajar, analisis regresi, problem based learning.
Asam Fosfat Sebagai Aktivator Karbon Aktif Tempurung Buah Nipah Miftahul Husnah; Ridwan Yusuf Lubis
Jurnal Phi Jurnal Pendidikan Fisika dan Fisika Terapan Vol 3, No 4 (2022)
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/p-jpft.v3i4.15413

Abstract

Telah dilakukan penelitian pembuatan karbon aktif dari tempurung buah nipah dengan menggunakan aktivator asam posfat. Tempurung buah nipah dapat digunakan untuk menghasilkan karbon aktif setelah melalui proses aktivasi secara fisika dan kimia, hal ini terlihat dari mayoritas hasil pengujian yang telah memenuhi standar arang aktif teknis. Penelitian ini bertujuan untuk mengetahui karbon aktif tempurung buah nipah dengan aktivator H3PO4. Proses karbonisasi dilakukan menggunakan oven dengan suhu 500 ºC dalam waktu 1 jam. Proses aktivasi karbon dilakukan menggunakan. Aktivasi kimia dilakukan menggunakan larutan H3PO4 direndam selama 24 jam dengan variasi konsentrasi 0, 2, 4, dan 6 M. Analisis yang dilakukan meliputi uji kadar air, kadar zat mudah menguap, kadar abu, dan kadar karbon. Hasil pengukuran nilai kadar air 5,45-7,72%, kadar zat mudah menguap 22,56-36,10%, kadar abu 11,21-26,45%, dan kadar karbon Terikat 37,45-66,23%. Seiring dengan peningkatan konsentrasi aktivasi maka cenderung terjadi penurunan pada nilai kadar air, kadar zat mudah menguap, dan kadar abu. Serta terjadi kenaikan pada nilai kadar karbon terikat. Karbon aktif tempurung buah nipah dengan karakteristik yang optimum dihasilkan pada konsentrasi aktivasi 6 M
Pengaruh Waktu Kontak Terhadap Penurunan BOD, COD, Dan Fe Pada Air Sungai Batang Toru Menggunakan Metode Elektrokoagulasi Masthura Masthura; Miftahul Husnah; Dwi Utami Panggabean
Jurnal Phi Jurnal Pendidikan Fisika dan Fisika Terapan Vol 3, No 4 (2022)
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/p-jpft.v3i4.15956

Abstract

Sungai Batang Toru merupakan sungai yang menunjang kehidupan sebagian besar masyarakat Batang Toru. Akan tetapi, dampak dari olahan air limbah pertambangan emas Batang Toru mengakibatkan kualitas dan kuantitas air sungai Batang Toru mengalami penurunan. Penelitian ini tentang bagaimana pengaruh waktu kontak terhadap penurunan kadar BOD, COD, dan Fe menggunakan metode elektrokoagulasi. Adapun variasi waktu yang diberikan, yaitu 15 menit, 30 menit, dan 45 menit. Waktu kontak 15 menit merupakan waktu terbaik dalam penurunan kadar BOD dan COD. Nilai penurunan BOD mencapai 20 mg/L dengan efisiensi 66,67%  dan nilai penurunan COD mencapai 28,8% mg/L dengan efisiensi 54,54%. Untuk Fe waktu kontak 45 menit merupakan waktu terbaik dalam penurunan kadar, dengan nilai penurunan Fe mencapai 1,42 mg/L dengan efisiensi 99,39%.
PENGARUH PENAMBAHAN AGREGAT LIMBAH BOTOL KACADAN ABU SERABUT KELAPA TERHADAP KARAKTERISTIK BATU BATA Miftahul Husnah; Abdul Halim Daulay; Siska Siska
JISTech (Journal of Islamic Science and Technology) Vol 7, No 2 (2022)
Publisher : UIN Sumatera Utara Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30829/jistech.v7i2.14663

Abstract

This study aims to (i) determine the effect of adding glass bottle waste aggregate and coconut fiber ash to the characteristics of the bricks and (ii) to determine the composition of mixing glass bottle waste aggregate and coconut fiber ash so that bricks with optimal characteristics are produced. The materials used in this study were glass powder, coconut fiber ash, and clay with a composition of glass powder, coconut fiber ash, and clay 0%:0%:100%, 5%:5%: 90%, 10% :10%:80%, 15%:15%:70%, and 20%:20%:60% with a FAS of 0.5. The process of making bricks is done manually. Characterizations carried out include: compressive strength, water absorption, and density. The addition of glass bottle waste aggregate and coconut fiber ash as a substitute for clay has an effect on the characteristics of the bricks. As the amount of glass powder and coconut fiber ash increases, the compressive strength value tends to decrease, the water absorption value tends to increase, and the density value tends to decrease. The compressive strength values in all compositions of mixing glass powder, coconut fiber ash, and clay still do not meet the SNI 15-2094-2000 standard. The value of water absorption at the composition of 5%:5%: 90% and 10%:10%:80% already meets the standards of SNI 15-2094-2000. Density values in all compositions have met the standards of SNI 15-2094-2000, except for the composition 15%: 15%: 70%. %:10%:80%.
Analysis of Mechanical Properties of Bioplastics Based on Banana Peel Starch with Variations of Rice Straw Cellulose Ety Jumiati; Miftahul Husnah; Sri Ayu Lestari
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 20, No 1 (2023): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v20i1.14067

Abstract

Plastic waste is a serious problem for society because it harms the environment. The manufacture of bioplastics as a substitute for conventional plastics is still being developed to produce healthy and safe plastic packaging. This study aims to see how the mechanical characteristics obtained from the manufacture of plastic from natural materials by utilizing waste plantain peels and rice straws which are commonly found in Indonesia. Variations in composition in the manufacture of bioplastics using a mass ratio of rice straw cellulose and plantain peel starch include sample A (0:2); sample B (0.25:1.75); sample C (0.5:1.5); sample D (0.75:1.25) and sample E (1:1) (w/w). The process of making bioplastics is carried out by heating all materials using a hot plate at 70℃ for 1 hour. The characterization carried out in this study was a test of tensile strength, percent elongation, and modulus of elasticity. The test results show that the bioplastic with the best composition variation is found in sample E with a tensile strength value of 114.51 kgf/cm2, an elongation test value of 3.99%, and a modulus of elasticity of 2873.97 kgf/cm2. The tensile strength test value in this study was by ASTM D882-12, which is 104.72 kgf/cm2, and the value of the modulus elasticity is close to the ASTM D882-12, which is 3163.81 kgf/cm2.KEYWORDS : bioplastic; banana peel starch; rice straw cellulose, mechanical characteristic.  
ANALISIS SIFAT MEKANIK PLASTIK BIODEGRADABLE PATI BIJI ALPUKAT DAN SELULOSA SEKAM PADI Ety Jumiati; Miftahul Husnah; Sunny Nafisah
Komunikasi Fisika Indonesia Vol 20, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.1.69-74

Abstract

Biodegradable plastics have been investigated using avocado seed starch, rice husk cellulose, chitosan, and glycerol in order to determine the mechanical characteristics of biodegradable plastics. Variations in the composition of avocado seed starch and rice husk cellulose in each sample A (100% : 0%), B (87.5% : 12.5%), C (75% : 25%), D (62.5% : 37.5%), and E (50% : 50%). The process of making biodegradable plastic is carried out using a material mixing process using a magnetic stirrer and a hot plate at a maintained temperature of  ± 70°C − 80°C and dried in an oven. Mechanical tests carried out include tensile strength, elongation, and modulus of elasticity tests. The results of the mechanical characterization test for the optimal biodegradable plastic are found in sample E (50% : 50%) with a tensile strength value of 20.6123 MPa and an elastic modulus of  353.7985 MPa which meets the ASTM D882-12 standard.
ANALISIS STRUKTUR KARAKTERISASI XRD DAN SEM PADA REDUCED GRAPHENE OXIDE (rGO) LIMBAH BAN Sandi Tri Febriani; Ety Jumiati; Miftahul Husnah
Komunikasi Fisika Indonesia Vol 20, No 1 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.1.49-54

Abstract

Research has been carried out using waste tires as the basic material for reduced graphene oxide (rGO). This research has been successfully synthesized using waste tire smoke with combustion and microwave assisted methods as a faster, easier, and safer synthesis process. The characterizations used in this research are X-ray diffraction (XRD) and scanning electron microscope (SEM). The powder is obtained through the process of capturing smoke from burning waste tires manually at a temperaturre of 300°C for 3 hours. Then it was reduced using microwave heating with variations in heating time of 20, 25, and 30 minutes. The results of the XRD characterization data showed a diffraction peak (002) peak at 2θ = 25° and a diffraction peak (101) peak 2θ = 43.9° which identified rGO and the results of the SEM characterization test obtained that the surface morfology formed a thin sheet.
PENGARUH GELOMBANG MIKRO DAN SULFUR SEBAGAI AGEN PASIVASI TERHADAP SPEKTRUM ABSORBANSI KARBON DOTS BERBASIS BAN BEKAS Ananda Tira Septiana Sari; Ety Jumiati; Miftahul Husnah
Komunikasi Fisika Indonesia Vol 20, No 2 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.2.147-152

Abstract

Used tires that are not used are usually thrown away and cause damage and environmental pollution. Information on the use of used tires is still limited, used tires are usually used in the synthesis of nanomaterials such as in the field of nanotechnology. This research was conducted to determine whether carbon dots can be synthesized from used car tires, sulfur can be used as a passivation agent in the synthesis of carbon dots, and to determine the wave absorption and fluorescence of carbon dots synthesized purely and with the addition of a passivation agent.Sulfur was used as a passivation agent with a carbon and sulfur ratio of 1:1. Microwave time variations were used 30, 35, and 40 minutes. The UV-Vis characterization of carbon dots showed a higher absorbance with variations in the length of microwave time and the addition of passivation agents. Luminance analysis with UV lamp obtained a brighter glow on karbon dots with the addition of a passivation agent.
Efektivitas Ekstrak Daun Jambu Biji Sebagai Inhibitor Dalam Menurunkan Laju Korosi Pada Logam Besi Miftahul Husnah; Masthura Masthura; Niswatun Nadra Lubis
Jurnal Phi Jurnal Pendidikan Fisika dan Fisika Terapan Vol 4, No 1 (2023)
Publisher : Universitas Islam Negeri Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/p-jpft.v4i1.16005

Abstract

 Telah dilakukan penelitian untuk mengetahui pengaruh penambahan variasi inhibitor ekstrak  daun jambu biji dan medium korosi larutan NaCl terhadap laju korosi pada logam besi. Penelitian ini menggunakan ekstrak daun jambu biji sebagai inhibitor organik dalam  menurunkan laju korosi dengan menggunakan medium korosi ialah larutan NaCl 3,5% Variasi konsentrasi inhibitor ekstrak daun jambu biji yang digunakan sebesar 0%, 10%, dan 20% dengan variasi waktu perendaman 3 hari, 6 hari dan 9 hari. Pengujian dan karakterisasi yang dilakukan meliputi analisis tanin, laju korosi dengan metode kehilangan massa, densitas, uji kekerasan dan uji morfologi menggunakan optical microscope (OM). Hasil penelitian menunjukkan nilai laju korosi menurun dengan penambahan konsentrasi inhibitor 20% selama waktu perendaman 9 hari sebesar 4.83 mpy. Nilai efisiensi sebesar 82,77 % pada konsentrasi inhibitor 20% selama waktu perendaman 9 hari.
Co-Authors Abdul Halim Daulay Ananda Tira Septiana Sari Dwi Utami Panggabean Ety Jumiati Jumiati, Ety Lailatul Husna Lubis Lisa Astari Masthura, Masthura Mutiah Lubis Niswatun Nadra Lubis Riadina Siregar Ridwan Yusuf Lubis Ridwan Yusuf Lubis Ririn sagita Aruan Sandi Tri Febriani Siska Siska Sri Ayu Lestari Sunny Nafisah