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All Journal Jurnal Ilmiah Rekayasa Sipil Prosiding Seminar Nasional Universitas Serambi Mekkah JURNAL KIMIA SAINTEK DAN PENDIDIKAN JIPI (Jurnal IPA dan Pembelajaran IPA)
Muhammad Zulfajri
Universitas Serambi Mekkah
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Other

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METODE EKSTRAKSI ANTOSIANIN DARI KULIT BUAH SYZYGIUM CUMINI(L.) SKEELS SEBAGAI INDIKATOR ALAMI ASAM BASA Muhammad Zulfajri; Muttakin Muttakin
Prosiding Seminar Nasional USM Vol 1, No 1 (2017): Prosiding Seminar Nasional USM
Publisher : Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (598.054 KB)

Abstract

Dalam penelitian ini, ekstrak berupa zat warna dari kulit buah Syzygium cumini (L.) skeels diekstraksi dengan menggunakan metode maserasi dan sokhletasi. Pelarut yang digunakan adalahetanol yang mampu menarik ekstrak dari sampel dengan baik. Ekstrak yang diperoleh dari keduametode tersebut digunakan untuk melakukan pengujian suatu larutan asam dan basa sehinggadiperoleh hasil yang membuktikan bahwa ekstrak dari kulit buah Syzygium cumini (L.) skeelsmampu berperan sebagai indikator alami asam basa yang baik, ditandai dengan terbentuknyawarna hijau pada larutan basa sesaat setelah ditambahkan ekstrak. Dari kedua metode ekstraksiini diperoleh volume ekstrak yang sedikit lebih banyak yang dihasilkan oleh metode sokhletasidikarenakan seluruh ekstrak mampu ditarik oleh pelarut bila dibandingkan dengan metodemaserasi. Kedua metode ini memiliki kelebihan dan kelemahan masing-masing, namun tetapmenghasilkan ekstrak dari kulit buah Syzygium cumini (L.) skeels dengan kualitas yang samasebagai indikator alami asam basa.
ANTIOXIDANT ACTIVITY ASSAY ETANOL EXTRACT OF PEPAYA LEAVES (Carica Papaya L.) FROM ACEH BESAR Tafonao, Joni Alman; Tammi, Isral; Damay, Rizki Damayanti; Zulfajri, Muhammad; Sembiring, Desi Sri Pasca Sari; Zai, Liver Iman Putra
JURNAL KIMIA SAINTEK DAN PENDIDIKAN Vol. 8 No. 2 (2024): JURNAL KIMIA SAINTEK DAN PENDIDIKAN
Publisher : Program Studi Kimia - Universitas Sari Mutiara Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/kimia.v9i2.5749

Abstract

The leaves, fruits, and roots of papaya (Carica papaya L) are mostly used as traditional medicine. Papaya leaves are used by the community to treat diarrhoea, acne, appetite, and digestive problems. Papaya leaf extract has potential as an antioxidant derived from secondary metabolites, namely alkaloid compounds that produce a bitter taste in papaya leaves. This study was conducted to look at antioxidant compounds by conducting antioxidant activity tests. The results of papaya leaf research contain active compounds flavonoids, alkaloids, and steroids. Research conducted on the level of colour brightness in papaya leaves is different, namely 10 ppm, 25 ppm, 50 ppm, 75 ppm and 100 ppm. Papaya leaf extract has a power that is included in the strong category with the IC50 value obtained 8.71 marked by the results of calculations less than 100. Antioxidant activity testing using the DPPH method papaya leaf extract positively contains antioxidant compounds and can be utilised as a natural antioxidant.
Analisis Clash Detection Perencanaan Proyek X Untuk Meminimalisir Anggaran Biaya dan Waktu Natalia, Monika; Misriani, Merley; Hamid, Desmon; Zulfajri, Muhammad; Iskandar, Arjunda
Jurnal Ilmiah Rekayasa Sipil Vol 21 No 2 (2024): Oktober 2024
Publisher : Pusat Penelitian dan Pengembangan Masyarakat (P3M), Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jirs.v21i2.1508

Abstract

Project construction has complexity conflict (clash). Clash can cause work delays, design changes, additional material, cost overruns, reduced quality, and project delays. Clash construction design can be detected with Autodesk Revit and Autodesk Naviswork manage software which are part of building information modeling (BIM) software. This research found the clash detection Project of X, caused this project's potential clash to be very large because each component is designed by a different team, so when detail engineering design (DED) it intersects with each other component. This study aims to find clash detection (hard clash and soft clash) for structural, architectural mechanical, electrical, and plumbing (MEP) components and provide solutions by repairing the clash. Hard clash found 184 clash points consisting of: clash between structures and architecture with 9 points, structures and MEP with 59 points, architecture and architecture with 16 points, architecture and MEP with 11 points, and MEP and MEP with 89 points. Soft clash found 96 points consisting of: clash between structures and architecture with 52 points, structures and MEP with 1 point, architecture and architecture with 18 points, architecture and MEP with 3 points, and MEP and MEP with 22 points. The solution to the clash found is to change, remove, and add to the components that occur clash using Autodesk Revit, to get zero clash so that this project planning is free clash.
Stability of Molybdenum Back Electrode on Muscovite Substrate for Flexible Thin-Film Solar Cells Syabriyana*, Maliya; Zulfajri, Muhammad; Maulinda, Maulinda; Akbar, Muhammad; Kumar, Nitin
Jurnal IPA & Pembelajaran IPA Vol 9, No 2 (2025): JUNE 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jipi.v9i2.46069

Abstract

The stability of molybdenum (Mo) back contacts in thin-film solar cells is crucial, as oxidation and water ingress can degrade the device performance. This study examines the quality and aging stability of Mo electrodes on flexible muscovite substrates with various adhesion layer deposition pressures (0, 3, 5, and 10 sccm). The microstructure and crystal quality of Mo were analyzed, and film stability was evaluated by exposing samples to atmospheric conditions for eight weeks. Film morphology, reflectance, and resistivity were assessed using scanning electron microscopy (SEM), UV-Visible spectrometry, and four-point probe measurements. In addition, impurity diffusion from muscovite substrates was investigated. The results show that the adhesion layer significantly improved Mos microstructure and crystal quality. Mo electrode with an adhesion layer deposited at low pressure exhibited good stability against environmental exposure compared to those without an adhesion layer. Secondary ion mass spectrometry (SIMS) analysis revealed that in the absence of an adhesion layer, aluminum and silicon diffused into Mo after aging, whereas with an adhesion layer, alkali metal diffusion was observed
Co-Authors Damay, Rizki Damayanti Desi Sri Pasca Sari Sembiring, Desi Sri Pasca Sari Desmon Hamid Iskandar, Arjunda Kumar, Nitin Maulinda, Maulinda Muhammad Akbar Muttakin Natalia, Monika Syabriyana*, Maliya Tafonao, Joni Alman Tammi, Isral Zai, Liver Iman Putra