The C-13 and proton NMR spectra, which clarified the differences in chemical characteristics among the various humic substances, showed that the marine humic acids had more aliphatic and less aromatic character than the Aldrich humic acid, and the marine fulvic acids had polysaccharide-like character...
Humic-like substances (HULIS) in ship engine emissions: molecular composition effected by fuel type, engine mode, and wet scrubber usage Environ. Sci. Technol. (2023), 10.1021/acs.est.3c04390 Google Scholar Sippula et al., 2014 O. Sippula, B. Stengel, M. Sklorz, T. Streibel, R. Rab...
Humic substances are not well defined, but are generally divided into three fractions: humin, which represents the insoluble components in aqueous solution at all pH values; humic acids (HA), which are soluble in alkaline to weakly acidic solutions, but deposit at or below pH 2.0; and fulvic...
60. Weaker binding ligands in the upper water column have sources from remineralization of sinking organic matter25, the rupture of phytoplankton cells by viral lysis61,62, and zooplankton grazing63. Deeper water column ligand sources are thought to include refractory, humic-like substa...
This again suggests a modification (increase) in the bacterial consumption of humic-like substances in the DOM exudates in the presence of MP (Fig. 4B). Humic substances can be both consumed and produced by marine bacteria36,37. In the more productive conditions of ES2, samples in dark ...
The findings from the HMA are consistent with recent findings indicating preferential degradation of humics-like substances during methanogenic degradation in sediments with high terrestrial organic matter loading [30]. Since benzoate is the central intermediate in the anaerobic degradation pathway of most...
Therefore, the presence of plastic containing substances like polystyrene may promote toxin removal. Costa et al. (2020) conducted a 96-hour experiment to examine the sorption of OA (10 ng/mL) onto circular plastic fragments (6 mm in size) made of polyethylene terephthalate (PET), ...
Humic acid like substances (HULIS), such as Leonardite (humic acid) and Suwannee River Fulvic Acid (fulvic acid), are employed as surrogates of biomass burning particles. Their ability to nucleate ice heterogeneously before and after exposure to ozone is investigated. The humic acid and fulvic ...
The C-13 and proton NMR spectra, which clarified the differences in chemical characteristics among the various humic substances, showed that the marine humic acids had more aliphatic and less aromatic character than the Aldrich humic acid, and the marine fulvic acids had polysaccharide-like character...
Most of the work on the effects of these substances has been done on crustaceans. A species-specific urinary sex attractant is produced by premoult female crabs of the genera Portunus, Carcinus ~nd Macropipus (147, 148) and some preliminary investigations into the chemical nature of that in ...