Results 11 to 20 of about 658,646 (263)
Excitation-Emission Matrix Spectroscopy for Analysis of Chemical Composition of Combustion Generated Particulate Matter [PDF]
Environmental Science & Technology, 2019 Analysis of particulate matter (PM) is important for the assessment of human exposures to potentially harmful agents, notably combustion-generated PM. Specifically, polycyclic aromatic hydrocarbons (PAHs) found in ultrafine PM have been linked to cardiovascular diseases and carcinogenic and mutagenic effects. In this study, we quantify the presence and
Gaurav Mahamuni +7 more
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, 2020 Exposure to combustion generated aerosols such as PM from residential woodburning, forest fires, cigarette smoke, and traffic emission have been linked to adverse health outcomes.
Gaurav Mahamuni +6 more
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Metrologia, 2016 The combination of isotope dilution and mass spectrometry has become an ubiquitous tool of chemical analysis. Often perceived as one of the most accurate methods of chemical analysis, it is not without shortcomings. Current isotope dilution equations are not capable of fully addressing one of the key problems encountered in chemical analysis: the ...
Pagliano, Enea, Meija, Juris
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Methods for the analysis of endocrine disrupting chemicals in selected environmental matrixes
Environmental Research, 2022 Endocrine disrupting chemicals (EDCs) are heterogenous in structure, chemical and physical properties, and their capacity to partition into various environmental matrixes. In many cases, these chemicals can disrupt the endocrine systems of vertebrate and invertebrate organisms when present at very low concentrations.
C.D. Metcalfe +5 more
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IQA analysis of the two-particle density matrix: chemical insight and computational efficiency
Theoretical Chemistry Accounts, 2023 AbstractThe interacting quantum atoms (IQA) method offers a rigorous and minimal route to calculate atomic electron correlation energies from the two-particle density matrix (2PDM). The price paid is that this method is very time-consuming. However, employing CCSD and CCSD(T), we explore several approaches to speed up such calculations.
Vincent, Mark, Popelier, Paul
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New Physico-Chemical Analysis of Magnesium-Doped Hydroxyapatite in Dextran Matrix Nanocomposites
Polymers, 2023 The new magnesium-doped hydroxyapatite in dextran matrix (10MgHApD) nanocomposites were synthesized using coprecipitation technique. A spherical morphology was observed by scanning electron microscopy (SEM). The X-ray diffraction (XRD) characterization results show hydroxyapatite hexagonal phase formation.
Daniela Predoi +7 more
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Solid-phase excitation-emission matrix spectroscopy for chemical analysis of combustion aerosols
PLOS ONE, 2021 Exposure to ultrafine combustion aerosols such as particulate matter (PM) from residential woodburning, forest fires, cigarette smoke, and traffic emission have been linked to adverse health outcomes. Excitation-emission matrix (EEM) spectroscopy presents a sensitive and cost-effective alternative for analysis of PM organic ...
Gaurav Mahamuni +7 more
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The chemical composition and homogeneity of the Allende matrix [PDF]
, 2021 The abundances of C, O, S, Na, K, Li, Mn, P, Cr, Si, Fe, Mg, Ni, Co, V, Ca, Ti, Al and Sc were determined in-situ in asample of the Allende meteorite using a laser ablation/ionization mass spectrometer to quantify the bulk chemicalcomposition of the ...
Neuland, M.B. +4 more
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Tooth matrix analysis for biomonitoring of organic chemical exposure: Current status, challenges, and opportunities [PDF]
Environmental Research, 2015 Epidemiological evidence supports associations between prenatal exposure to environmental organic chemicals and childhood health impairments. Unlike the common choice of biological matrices such as urine and blood that can be limited by short half-lives for some chemicals, teeth provide a stable repository for chemicals with half-life in the order of ...
Syam S, Andra +2 more
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Categorical Dimensions of Human Odor Descriptor Space Revealed by Non-Negative Matrix Factorization [PDF]
, 2013 In contrast to most other sensory modalities, the basic perceptual dimensions of olfaction remain unclear. Here, we use non-negative matrix factorization (NMF) – a dimensionality reduction technique – to uncover structure in a panel of odor profiles ...
Castro, Jason B. +16 more
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