Article
Chemistry, Applied
Lisa Zastrow, Michael Judas, Karl Speer, Karl-Heinz Schwind, Wolfgang Jira
Summary: The contents of eight oxygenated polycyclic aromatic hydrocarbons (OPAHs) and six PAHs were investigated in barbecued meat and non-meat patties. The highest contents were observed with a disposable grill and a charcoal grill. Fluoren-9-one and anthracene-9,10-dione were the dominant compounds within OPAHs. No suitable markers for OPAH prediction could be found. OPAHs should be included in future PAH investigations.
Article
Food Science & Technology
Elisa Sonego, Bina Bhattarai, Lene Duedahl-Olesen
Summary: Polycyclic aromatic hydrocarbons (PAHs) are toxic compounds found in smoked food products, along with more toxic nitrated (NPAH) and oxygenated (OPAH) PAHs derivatives. However, these derivatives are often not included in the analysis of food. This study successfully developed a method to analyze PAHs and their derivatives in smoked and fried fish samples, and suggests that future food analysis should focus on PAH and oxygenated derivatives.
Article
Pharmacology & Pharmacy
Rohanizah Abdul Rahim, Putri Ayu Jayusman, Vuanghao Lim, Nor Hazwani Ahmad, Zuratul Ain Abdul Hamid, Sharlina Mohamed, Norliza Muhammad, Fairus Ahmad, Norfilza Mokhtar, Norazlina Mohamed, Ahmad Nazrun Shuid, Isa Naina Mohamed
Summary: This study evaluated the chemical composition and antioxidant activity of Blainvillea acmella extracts and assessed their anabolic effects on bone cells. The results showed that the ethanol extract of B. acmella had higher antioxidant and bone anabolic activities, and these effects were positively correlated with phenolic content.
FRONTIERS IN PHARMACOLOGY
(2022)
Article
Thermodynamics
Bingjie Chen, Peng Liu, Qiang Xu, Zhandong Wang, William L. Roberts, Heinz Pitsch
Summary: The oxidation process of n-heptane/toluene mixture at low temperatures was investigated, and 32 species were identified and measured using two measurement techniques. Numerical simulations accurately predicted the proportions of fuel molecules and small intermediates, but under-predicted the fractions of oxygenated aromatics.
COMBUSTION AND FLAME
(2022)
Article
Energy & Fuels
Md Nayer Nasim, Behlol Nawaz, Shubhra Kanti Das, Amina SubLaban, Luis Miguel Garcia-Cuevas Gonzalez, Jose Ramon Serrano, J. Hunter Mack
Summary: Hydrogen is seen as a promising carbon-free fuel, but its distinct combustion properties compared to hydrocarbon fuels present challenges. This study explores the properties of premixed H2-CO2 combustion, finding that using CO2 as a working fluid can reduce flame speed and achieve performance comparable to natural gas.
Article
Thermodynamics
Bingjie Chen, Maximilian Hellmuth, Sebastian Faller, Laurenz May, Peng Liu, Liming Cai, William L. Roberts, Heinz Pitsch
Summary: This study investigates the combustion chemistry of anisole under oxy-fuel conditions using both experimental and numerical simulation methods. The results show that the kinetic model used in the simulations overpredicts certain aromatic hydrocarbons, polycyclic aromatic hydrocarbons (PAH), and oxygenated polycyclic aromatic hydrocarbons (OPAH), suggesting issues with the reaction rate coefficients in PAH and OPAH chemistry. Preliminary updates to the kinetic model improve the predictions for benzofuran, naphthalene, and acenaphthylene.
COMBUSTION AND FLAME
(2022)
Article
Chemistry, Multidisciplinary
Ajay Kumar Meena, Raju Ilavarasan, Vikas Ojha, Ayyam Perumal, Ravindra Singh, Narayanam Srikanth, Kartar Singh Dhiman
Summary: The aim of this study is to take a conservative approach to the Bombax ceiba plant by using short branches instead of stem bark. The HPLC, LCMS, and GCMS data showed similarities between the stem bark and tiny branches of the plant. The analysis using LC-MS revealed abundant medicinal phytochemicals of Bombax ceiba and its molecular docking interaction with AKT Protein Kinase, Human Acetyl Choline Esterase, and Pancreatic Lipase Colipase target protein.
Review
Chemistry, Analytical
Raveena Udhani, Charmy Kothari, Jayrajsinh Sarvaiya
Summary: Micronutrient deficiency is common and has a significant impact on human health and well-being. Micronutrient deficiency can lead to the development of diseases, affecting pathophysiology either directly or indirectly. The diagnosis of micronutrient deficiency is imprecise due to the choice of biomarkers and diagnostic techniques used. Instead of relying on a single biomarker, a combination of biomarkers provides more accurate results for micronutrient testing. Traditional analytical techniques like HPLC, ELISA & LCMS/MS are sensitive and reliable methods used in certified labs. However, there is a shift towards Point of Care Testing (POCT), which offers innovative diagnostic tools such as biosensors, paper-based sensors, microfluidic chips, wearable devices, and smartphone-assisted diagnostics. This outlook summarizes the importance of micronutrients, their biomarkers, analytical techniques, and the emergence of POCT.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Fausto Viteri, Davinson Pezo, Angela Millera, Rafael Bilbao, Maria U. Alzueta
Summary: This study aimed to quantify PAH and oxy-PAH from different soot samples, revealing their carcinogenic and mutagenic potential, and confirming the reliability of the developed quantification method.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2021)
Article
Thermodynamics
Shunsuke Suzuki, Shota Kiuchi, Koichi Kinoshita, Yoshinaka Takeda, Kotaro Tanaka, Mitsuharu Oguma
Summary: Interest in PAHs and OPAHs has been growing due to their toxicity and wide presence. Understanding the formation mechanism of OPAHs is crucial for reducing their emission. However, research on the quantitative evaluation of OPAHs is limited. This study quantitatively evaluated the formation of OPAHs and PAHs using a flow reactor system and compared the measured data with existing kinetic models. Additionally, the reaction pathways contributing to the formation of OPAHs were evaluated.
COMBUSTION SCIENCE AND TECHNOLOGY
(2022)
Article
Thermodynamics
Hoang Khoi Nguyen, Ji Hong Moon, Sung Ho Jo, Sung Jin Park, Dal Hee Bae, Myung Won Seo, Ho Won Ra, Sang-Jun Yoon, Sung-Min Yoon, Jae Goo Lee, Tae-Young Mun, Byungho Song
Summary: This study successfully improved the ash behavior of biomass combustion in oxy-fuel circulating fluidized bed by using kaolin as an additive, which resulted in enhanced potassium capture performance, reduced fouling formation, decreased SO2 emission, and significant improvements in combustion efficiency and CO2 concentration.
Article
Chemistry, Analytical
Rushikesh Biradar, Shankha Dey, Sayalee Sanjay Mane, Swapnil J. Dengale
Summary: This study reports the development and validation of an LC-MS/MS method for the estimation of EC5026 from rat plasma, which is simple, specific, and sensitive. The method was used to investigate the pharmacokinetics of EC5026 in rats, showing moderate clearance and satisfactory oral bioavailability, as well as high plasma protein binding.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2024)
Article
Energy & Fuels
Xiuli An, Yu Yang, Weiguang Cai, Shu Zheng, Qiang Lu
Summary: In this study, the effects of simultaneous addition of CO2 to fuel and oxidizer streams (CO2-F/O) on soot formation in a C2H4 flame were investigated experimentally and numerically. The results showed that CO2-F/O effectively suppressed soot formation, with the largest suppression effect from dilutive CO2, followed by chemical CO2 and the smallest effect from radiative CO2. The suppression of soot formation was mainly attributed to the decrease in the reaction rate of C2H4 and the reduction in the concentration of polycyclic aromatic hydrocarbons. In addition, CO2-F/O also inhibited the condensation rate of soot by lowering the flame temperature and decreasing the concentrations of important radicals involved in soot formation.
Article
Chemistry, Organic
Ryuichi Murata, Keisuke Asano, Seijiro Matsubara
Summary: The study demonstrates the asymmetric cycloetherification of enols, generated from ketones, using chiral organocatalysts. The reaction selectively produced dihydropyran derivatives, which are essential building blocks for synthesizing glycans.
Article
Energy & Fuels
Zhenghong Zhao, Zewu Zhang, Fan Wu, Yuxiao Chen, Cong Luo, Xiaoshan Li, Ge Gao, Liqi Zhang, Chuguang Zheng
Summary: This study investigates the impact of steam addition on turbulent mixing and chemical reaction in pulverized coal MILD-oxy combustion. The results show that steam affects flame temperature, weakens internal flue gas recirculation, and transitions the combustion towards turbulent mixing control. With increasing steam concentration, chemical reactions shift towards diffusion-controlled regime.
Article
Environmental Sciences
Steven G. O'Connell, Nancy I. Kerkvliet, Susan Carozza, Diana Rohlman, Jamie Pennington, Kim A. Anderson
ENVIRONMENT INTERNATIONAL
(2015)
Article
Environmental Sciences
Molly L. Kile, Richard P. Scott, Steven G. O'Connell, Shannon Lipscomb, Megan MacDonald, Megan McClelland, Kim A. Anderson
ENVIRONMENTAL RESEARCH
(2016)
Retraction
Engineering, Environmental
Lane G. Tidwell, Sarah E. Allan, Steven G. O'Connell, Kevin A. Hobbie, Brian W. Smith, Kim A. Anderson
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2016)
Article
Engineering, Environmental
Lane G. Tidwell, Sarah E. Allan, Steven G. O'Connell, Kevin A. Hobbie, Brian W. Smith, Kim A. Anderson
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2016)
Article
Engineering, Environmental
Ian J. Allan, Steven G. O'Connell, Sondre Meland, Kine Baek, Merete Grung, Kim A. Anderson, Sissel B. Ranneklev
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2016)
Article
Environmental Sciences
Kim A. Anderson, Gary L. Points, Carey E. Donald, Holly M. Dixon, Richard P. Scott, Glenn Wilson, Lane G. Tidwell, Peter D. Hoffman, Julie B. Herbstman, Steven G. O'Connell
JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY
(2017)
Article
Environmental Sciences
Steven G. O'Connell, Melissa A. McCartney, L. Blair Paulik, Sarah E. Allan, Lane G. Tidwell, Glenn Wilson, Kim A. Anderson
ENVIRONMENTAL POLLUTION
(2014)
Letter
Engineering, Environmental
Steven G. O'Connell, Susan E. Carozza, Nancy I. Kerkvliet, Kim A. Anderson
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2014)
Article
Engineering, Environmental
Lane G. Tidwell, Sarah E. Allan, Steven G. O'Connell, Kevin A. Hobbie, Brian W. Smith, Kim A. Anderson
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2015)
Article
Engineering, Environmental
Steven G. O'Connell, Laurel D. Kind, Kim A. Anderson
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2014)
Article
Environmental Sciences
Norman D. Forsberg, Steven G. O'Connell, Sarah E. Allan, Kim A. Anderson
ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
(2014)
Article
Environmental Sciences
Steven G. O'Connell, Kim A. Anderson, Marc I. Epstein
Summary: Silicone personal samplers were used to measure chemical exposures and create predictive models for air equivalency calculations. The models showed good performance in predicting organic chemicals uptake and were refined to develop comprehensive and effective predictive models. The final estimates of air equivalency correlated well with example dataset, covering a wide range of concentrations.
JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY
(2022)
Article
Environmental Sciences
Dana E. Goin, Dimitri Abrahamsson, Miaomiao Wang, June-Soo Park, Marina Sirota, Rachel Morello-Frosch, Erin DeMicco, Jessica Trowbridge, Laura August, Steven O'Connell, Subhashini Ladella, Marya G. Zlatnik, Tracey J. Woodruff
Summary: Multiple exposure-assessment approaches can identify a wide range of chemicals that pregnant individuals may be exposed to, and these chemicals may have adverse effects on health.
JOURNAL OF EXPOSURE SCIENCE AND ENVIRONMENTAL EPIDEMIOLOGY
(2023)
Article
Environmental Sciences
Margaret A. Reams, Anna K. Harding, Wilma Subra, Nina S. N. Lam, Steven G. O'Connell, Lane Tidwell, Kim A. Anderson
JOURNAL OF ENVIRONMENTAL HEALTH
(2017)
Meeting Abstract
Chemistry, Multidisciplinary
Marc R. Elie, Norman D. Forsberg, Steven G. O'Connell, Robert Tanguay, Kim A. Anderson
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2013)