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All Journal Jurnal Reka Lingkungan Kultivasi Chemistry Indonesian Journal of Chemical Research
Maulana, Yusuf Eka
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Engineering Environmental Science

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Identifikasi Senyawa BTEX pada Asap Kendaraan Bermotor Roda Dua MAULANA, YUSUF EKA; YULIANA, TRISNA; ROHMAH, AINI ASPIATI
Jurnal Reka Lingkungan Vol 9, No 2 (2021)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (999.679 KB) | DOI: 10.26760/rekalingkungan.v9i2.71-83

Abstract

 AbstrakPenggunaan kendaraan bermotor roda dua di Indonesia semakin berkembang pesat. Semakin tinggi tingkat penggunaan transportasi yang beroperasi disuatu daerah, maka akan semakin tinggi pula potensi pencemaran udara di daerah tersebut. Jika pembakaran pada kendaraan bermotor tidak sempurna maka dapat dihasilkan senyawa yang berbahaya yaitu benzene (C6H6), toluene (C7H8), ethylbenzene (C8H9), dan xylene (C8H10) atau biasa disingkat BTEX. Tujuan penelitian ini adalah untuk mengidentifikasi senyawa BTEX dan senyawa hidrokarbon lainnya dalam asap kendaraan bermotor dengan menggunakan kromatografi gas-spektrometer massa (GC-MS). Hasil identifikasi menunjukkan adanya hubungan yangsangat kuat antara standard dengan hasil pengukuran yaitu dengan R2 di atas 0,99. Identifikasi menunjukkan senyawa BTEX yang terbentuk adalah Benzene, Toluene, Etil Benzene, Xylene.Kata kunci: kendaraan bermotor, hidro karbon, BTEX, GC-MS.AbstractThe use of two wheels motorized vehicles or motorcycles in Indonesia is growing rapidly. It has been known that the greater the number of two wheels motorized vehicles the higher the potential for air pollution. If the combustion occur incomplete, hazardous compounds can be generated, namely benzene (C6H6), toluene (C7H8), ethylbenzene (C8H9), and xylene (C8H10) or commonly abbreviated BTEX. The purpose of this study was to identify BTEX compounds and other hydrocarbon compounds in motor vehicle fumes using gas chromatography-mass spectrometers. The identification results indicate a very strong relationship between the standard and the measurement results, with R2 above 0.99. Identification shows that BTEX compounds formed are Benzene, Toluene, Ethyl Benzene, Xylene. Keywords: motorcycles, hidro karbon, BTEX, GC-MS.
Identifikasi Senyawa BTEX pada Asap Kendaraan Bermotor Roda Dua MAULANA, YUSUF EKA; YULIANA, TRISNA; ROHMAH, AINI ASPIATI
Jurnal Reka Lingkungan Vol 9, No 2 (2021)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (999.679 KB) | DOI: 10.26760/rekalingkungan.v9i2.71-83

Abstract

 AbstrakPenggunaan kendaraan bermotor roda dua di Indonesia semakin berkembang pesat. Semakin tinggi tingkat penggunaan transportasi yang beroperasi disuatu daerah, maka akan semakin tinggi pula potensi pencemaran udara di daerah tersebut. Jika pembakaran pada kendaraan bermotor tidak sempurna maka dapat dihasilkan senyawa yang berbahaya yaitu benzene (C6H6), toluene (C7H8), ethylbenzene (C8H9), dan xylene (C8H10) atau biasa disingkat BTEX. Tujuan penelitian ini adalah untuk mengidentifikasi senyawa BTEX dan senyawa hidrokarbon lainnya dalam asap kendaraan bermotor dengan menggunakan kromatografi gas-spektrometer massa (GC-MS). Hasil identifikasi menunjukkan adanya hubungan yangsangat kuat antara standard dengan hasil pengukuran yaitu dengan R2 di atas 0,99. Identifikasi menunjukkan senyawa BTEX yang terbentuk adalah Benzene, Toluene, Etil Benzene, Xylene.Kata kunci: kendaraan bermotor, hidro karbon, BTEX, GC-MS.AbstractThe use of two wheels motorized vehicles or motorcycles in Indonesia is growing rapidly. It has been known that the greater the number of two wheels motorized vehicles the higher the potential for air pollution. If the combustion occur incomplete, hazardous compounds can be generated, namely benzene (C6H6), toluene (C7H8), ethylbenzene (C8H9), and xylene (C8H10) or commonly abbreviated BTEX. The purpose of this study was to identify BTEX compounds and other hydrocarbon compounds in motor vehicle fumes using gas chromatography-mass spectrometers. The identification results indicate a very strong relationship between the standard and the measurement results, with R2 above 0.99. Identification shows that BTEX compounds formed are Benzene, Toluene, Ethyl Benzene, Xylene. Keywords: motorcycles, hidro karbon, BTEX, GC-MS.
Growth and yield response of Tanjung II and Unpad CB2 red chili varieties grown in the medium land Lestari, Rahma Wati; Kusumiyati, Kusumiyati; Mubarok, Syariful; Maulana, Yusuf Eka
Kultivasi Vol 23, No 1 (2024): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v23i1.42551

Abstract

Red chili is an important commodity that is daily needed by the community. Non-central chili areas often experience deficits due to the high consumption volume and low productivity of chili peppers. To increase the productivity of chili in non-central areas, expand it in the medium land. This study aims to determine the productivity of two introduced chili varieties in the medium land whose adaptation areas came from lowland and highland areas. This study was analyzed using an independent sample T-test at a significant level of 5%. The results of the data analysis showed that the Tanjung II variety significantly influenced the parameters of stem diameter and weight of the fruit. Meanwhile, the Unpad CB2 variety significantly influences the parameters of plant height, number of leaves, number of flowers, number of fruits, and fruit set. However, both varieties have no noticeable effect on the weight parameters of the cropping fruit and potential yield in hectares. The Tanjung II variety experienced a decrease in yield by 54.58%, while the Unpad CB2 variety was 53.56%.
Synthesis, Evaluation, and Molecular Docking Study of 4-Monoacyl Resorcinol Against Tyrosinase Enzyme Danova, Ade; Maulana, Yusuf Eka; Hermawati, Elvira; Chavasiri, Warinthorn
Indonesian Journal of Chemical Research Vol 11 No 2 (2023): Edition for September 2023
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598//ijcr.2023.11-nov

Abstract

Tyrosinase is a crucial enzyme in melanin production to protect the skin from ultraviolet, leading to skin cancers. This study synthesized eight compounds of acyl resorcinol with long-chain carbon (1-8) and structurally elucidated by 1H and 13C NMR. The in vitro evaluation of eight synthesized compounds against tyrosinase enzyme showed that 4-heptanoyl resorcinol (6) exhibited high inhibitory activity compared with the kojic acid as standard. In addition, the molecular docking study demonstrated that 6 showed lower binding energy (-7.3 kcal/mol) than kojic acid (-6.9 kcal/mol) and possessed interaction with crucial residues in the active site.
Co-Authors Ade Danova Chavasiri, Warinthorn Hermawati, Elvira Kusumiyati Lestari, Rahma Wati ROHMAH, AINI ASPIATI ROHMAH, AINI ASPIATI SYARIFUL MUBAROK Yuliana, Trisna