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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

Â 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.Â 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

Â 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.Â 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

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 Sains dan Teknologi, Universitas Pattimura

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

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.

The LC-MS of Grammatophyllum scriptum (Lindl.)Bl. and Cytoxic Activity Test: LC-MS of Grammatophyllum scriptum (Lindl.)Bl. and Cytoxic Activity Test de Fretes, Christina; Simaremare, Eva; Gunawan, Elsye; Agustini, Verena; Maulana, Yusuf Eka; Fadhilah, Nabila Nur
JFIOnline | Print ISSN 1412-1107 | e-ISSN 2355-696X Vol. 13 No. 2 (2021): Jurnal Farmasi Indonesia
Publisher : Pengurus Pusat Ikatan Apoteker Indonesia

Anggrek Macan (Grammatophyllum scriptum (Lindl.) Bl.) merupakan salah satu tanaman yang digemari di kalangan masyarakat sebagai tanaman hias karena bunganya yang indah. Aggrek macan memiliki senyawa metabolit sekunder alkaloid, flavonoid dan tannin yang dapat digunakan sebagai pengobatan tradisional. Namun, penelitian mengenai Anggrek Macan di bidang farmakologi masih sangat terbatas. Tujuan penelitian ini adalah mengetahui kandungan senyawa kimia yang terdapat dalam ekstrak herba Anggrek Macan secara LC-MS/MS serta nilai LC₅₀ dan konsentrasi dari ekstrak herba Anggrek Macan yang paling efektif membunuh larva udang (Artemia salina Leach.). Metode yang digunakan dalam penelitian ini adalah pengambilan sampel dari kebun Anggrek yang ada di Lingkungan FMIPA Universitas Cenderawasih Papua-Indonesia, selanjutnya sampel dibuat dalam bentuk simplisia, diekstraksi dengan etil asetat. Ekstrak selanjutnya dianalisis dengan LC-MS/MS dan dari ekstrak tersebut juga dilakukan uji sitotoksik dengan metode BSLT (Brine Shrimp Lethality Test). Hasil penelitian menunjukkan bahwa Anggrek Macan (Grammatophyllum scriptum (Lindl.) Bl.) mengandung 2′,6′-Dihydroxy-4′-methoxy-dihydrochalcone, Apigenin-7-O-α-L-rhamnose(1→4)-6"-O-acetyl-β-D-glucoside, Kushenol H, Rubrofusarin, 3-Hydroxy baicalein dan Luteolin yang diperoleh dari hasil analisis menggunakan Liquid Chromatography tandem Mass Spectrometry (LC-MS/MS). Ekstrak herba Anggrek Macan memiliki aktivitas sitotoksik dengan nilai LC₅₀ 150,96 ppm dengan tergolong kurang toksik.

Effect of Poultry Manure and Ethephon on Growth, Yield, and Quality of Cayenne Pepper (Capsicum frutescens L.) ‘Ratuni UNPAD’ Kusumiyati, Kusumiyati; Ramadhani, Rahmatillah; Maulana, Yusuf Eka; Hamdani, Jajang Sauman
AGRIVITA Journal of Agricultural Science Vol 46, No 1 (2024)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v46i1.4034

The production of 'Ratuni UNPAD' cayenne pepper can be increased using organic chicken manure. However, the application of ethephon is needed during fertilization due to the significantly slow flower initiation. Therefore, this study aims to determine the interaction between chicken manure and ethephon on the growth, yield, and quality of the 'Ratuni UNPAD' cayenne pepper. Planting is carried out 829 meters above sea level (masl), and a factorial randomized block experimental design comprises 2 factors with 3 replications. The first factor is the dose of chicken manure (10, 20, 30, and 40 t/ha), while the second is the ethephon concentration (0, 500, 1000, and 1500 ppm). The results showed no interaction between poultry manure and ethephon on the growth, yield, and quality of the 'Ratuni UNPAD' cayenne pepper. According to the doses of chicken manure, 40 t/ha significantly affects the flower initiation, fruit number, weight, length, and diameter, as well as capsaicin and dihydrocapsaicin. The 30 t/ha shows the highest value for the number of leaves and productive branches, while 20 tons dose/ha influences flavonoids, phenolics, and total carotenoids. The ethephon concentration of 1500 ppm significantly affects the flower initiation, fruit length, diameter, capsaicin, and dihydrocapsaicin.

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