Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Biology, Medicine, & Natural Product Chemistry Jurnal Teknik Terapan (J-TETA)
Sheryl Ayesha Bruning
Universitas Singaperbangsa Karawang
Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Public Health

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Sustainable Valorization of Corncob Residues through Green Lignin Extraction for Functional Sunscreen Applications Teguh Pambudi; Hilman Imadul Umam; Fajar Amelia Rachmawati Putri; Alifa Rahma Zuhri; Nanda Aurelia Salsabila S.; Melisa Nur Halimah; Sheryl Ayesha Bruning; Elzandra Imola Vioniken
Biology, Medicine, & Natural Product Chemistry Vol 15, No 1 (2026)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2026.151.119-125

Abstract

Corncob residues represent an abundant agricultural biomass rich in cellulose, hemicellulose, and lignin. Lignin, an aromatic biopolymer containing benzene and ketone functional groups, exhibits inherent ultraviolet (UV) absorption, positioning it as a promising bio-based ingredient for sustainable sunscreen formulations. In this study, lignin was extracted from corncob residues—comprising 18.5% hemicellulose, 23.5% cellulose, and 16.5% lignin—using a green deep eutectic solvent (DES) system composed of choline chloride and citric acid, and benchmarked against conventional alkaline extraction using NaOH. FTIR analysis revealed attenuated peak intensities in DES-extracted lignin, indicating lower recovery and partial structural alteration relative to the NaOH-derived counterpart. Extraction yields were 10.06% for the DES method and 16.19% for the NaOH method. Sunscreen formulations containing 2%, 3%, and 4% lignin exhibited appreciable UV absorption, particularly within the UVA region, with the highest performance observed at 4% lignin loading. These results highlight the feasibility of valorizing corncob biomass through environmentally benign lignin extraction to produce functional bio-based materials for sustainable sunscreen applications.
Analisis Kinerja Heat Exchanger Tipe Shell and Tube Berdasarkan Nilai Fouling Factor, Efesiensi, dan Pressure Drop sebagai Indikator Kinerja Operasional Rantika Sekar Nandira; Sarah Dampang; Sesilia Romalinda; Sheryl Ayesha Bruning; Jatmiko
Jurnal Teknik Terapan Vol. 5 No. 1 (2026): April
Publisher : P3M Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/jteta.v5i1.123

Abstract

The oil and gas industry heavily relies on the efficiency of shell-and-tube heat exchangers to maintain operational stability, optimize energy consumption, and preserve product quality. However, the performance of these units is often degraded by fouling, which increases thermal resistance. This study aims to evaluate the actual performance of a heat exchanger unit in the oil and gas industry by analyzing operational data over a specific period. The research methodology involved direct field observation and quantitative analysis based on key performance parameters, including the overall heat transfer coefficient, fouling factor, thermal efficiency, and pressure drop. The fouling factor was calculated as the difference between the clean and dirty heat transfer coefficients, while thermal efficiency was determined as the ratio of the actual heat transferred to the maximum possible heat transfer. Pressure drop analysis was conducted on both the shell and tube sides using friction factor correlations and fluid hydrodynamic parameters to evaluate flow characteristics. The results indicate a fouling factor of 0.2076 hr·ft²·°F/Btu, which significantly exceeds the standard threshold proposed by Kern (0.002–0.005 hr·ft²·°F/Btu). This high level of fouling results in a heat transfer efficiency of only 64.62%, well below the ideal operational standard of 75%. Hydrodynamic analysis shows that the pressure drop is very low (0.0003–0.0006 psi), indicating that the flow is in the laminar regime (Re < 2100). This laminar condition reduces heat transfer effectiveness due to the dominance of conduction and accelerates the deposition of solid particles on the heat transfer surface. Although the unit is still considered operable, the evaluation results highlight the need for immediate cleaning and flow rate optimization to restore the equipment’s performance to optimal levels and prevent further energy losses
Co-Authors Alifa Rahma Zuhri Elzandra Imola Vioniken Fajar Amelia Rachmawati Putri Hilman Imadul Umam Jatmiko Melisa Nur Halimah Nanda Aurelia Salsabila S. Rantika Sekar Nandira Sarah Dampang Sesilia Romalinda Teguh Pambudi