Publications by authors named "S P Siregar"

Ground-level ozone (O) can infiltrate indoor environments, severely impacting the environment and human health. Moisture-induced catalyst deactivation is a major challenge in catalytic ozone removal. MOF-template-derived heterojunctions supported by carbon materials can prevent chemisorption of water vapor at active sites.

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The concentration of PM (particulate matter with a diameter < 2.5 µm) on Sumatra Island has increased, mainly because of forest and peatland fires, transportation, and industry. Biomass burning releases partially burned carbon into the atmosphere, resulting in a smoky haze containing PM.

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Introduction And Objectives: Radical cystectomy in bladder cancer patients can result in postoperative complications, including venous thromboembolism (VTE), with an incidence reported between 3% and 11.6%. Although low-molecular-weight heparin (LMWH) is the recommended prophylactic treatment, challenges such as financial constraints and patient adherence remain.

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This study presents an innovative approach for estimating the proximate composition of diverse rice varieties using attenuated total reflectance fourier transform infrared (ATR-FTIR) spectroscopy and chemometric techniques. Principal component analysis (PCA) reveals distinct separations among the seven rice varieties based on their FTIR spectra. Robust partial least squares (PLS) regression models, developed with high calibration ( ) values from 0.

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