The xylenes underwent three processes of photoisomerization photodecomposition and photooxidation to produce intermediates of aromatics alkanes and carbonyls
Among them, the photo-isomerization products showed the highest concentration percentage (e.g., ≥50% in o-xylene system), confirming that photo-isomerization reaction was the dominated photodegradation process of xylenes. Moreover, these isomerized products not only contributed about 97% and 91% to the formation potential of O3 (OFP) and secondary organic aerosols (SOAFP), but also displayed obvious non-carcinogenic risk, although one of photodecomposition product-benzene showed the highest occupational exposure risk. Therefore, View more and health risks of photodegradation products of xylenes were non-ignorable, although the OFP, SOAFP and health risks of the generated products reduced at least 4 times in comparison with that of the degraded xylenes. The findings are helpful for the appropriate application of this technology in the purification of industrial organic waste gas.
declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this Oxidative stress caused by ozone exposure induces loss of brain repair in the Zanardo-Gomes M, Angoa-Pérez M, Raisman-Vozari R.Oxidative stress is involved in many neurodegenerative diseases. Chronic ozone exposure causes a secondary increase of reactive oxygen species, which cause an oxidative stress state in the organism. Ozone is one of the main components of photochemical pollution. Our purpose was to test that oxidative stress caused by chronic low doses of ozone, by itself, alters adult neurogenesis and causes progressive neurodegeneration in the hippocampus, which actions lead to the loss of brain plasticity in the mature central nervous system of rats. Animals were exposed to an ozone-free air stream and for 15, 30, 60, and 90 days to low doses immunohistochemistry testing against doublecortin, Neu-N, p53, microglia, and ozone causes an increase of LPO levels, morphological changes in the nucleus and the cytoplasm, and cell swelling in neurons. The Western blot shows a decrease for Neu-N and doublecortin.
Activated and later phagocytic microglia and an increased number of astrocytes were found. There was a memory deficiency positively related to the amount of ozone exposure. These alterations suggest that oxidative stress caused by low doses of ozone causes dysregulation of inflammatory processes, progressive neurodegeneration, chronic loss of brain repair in the hippocampus, and brain plasticity changes in the rat analogous to Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences, P.O. Box 1126, Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences, P.O. Box 1126, Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, PR Institute of Plasma Physics, HFIPS, Chinese Academy of Sciences, P.
O. Box 1126, Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, PR With the development of MXene as the efficient adsorbent for U(VI), the tendency of MXene coming into contact with U(VI) in wastewaters increases. Motivated by UV light irradiation applied in wastewater treatments, the UV light induced photochemical co-transformation of Ti3C2Tx MXene and U(VI) is studied. To clarify the role of U(VI) induced Ti3C2Tx aggregation in phototransformation of Ti3C2Tx, the aggregation kinetics of Ti3C2Tx in the presence of various valent radioactive ions are investigated, obtaining the critical coagulation concentrations (CCC) of Ti3C2Tx for Cs+, Sr2+, UO22+, Eu3+, and Th4+. Besides, the colloidal stability of UV-induced Ti3C2Tx as a function of standing time is discussed. The results show that the aggregation behavior of Ti3C2Tx induced by radioactive ions follows the classical Derjaguin-Landau-Verwey-Overbeek (DLVO) theory and the Schulze-Hardy rule. The UV irradiation will change the physicochemical properties and colloidal stabilities of Ti3C2Tx.
Furthermore, Photolyzable Acid Precursor of Ti3C2Tx can be accelerated by UV irradiation and further promoted by the presence of U(VI). The removal of U(VI) is highest in the case of Ti3C2Tx combined with UV irradiation via adsorption and reduction. 6-butyl-n-hydroxynaphthimide trifluoromethanesulfonic acid as a Precursor for Naphthalimide Derivatives provides an example demonstrating that the simultaneous transformation of Ti3C2Tx (adsorbent) and U(VI) (adsorbate) to mild toxic components.Grafting of Tetraphenylethylene on Silica Surface, Characterizations, and Their Chromatographic Performance as Reversed-Phase Stationary Phases.Province, College of Chemistry & Chemical Engineering, Northwest Normal Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Resources; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province; Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining810008, Surface modification is an effective way to functionalize the materials so as to get some special properties. Tetraphenylethylene (TPE) has been widely investigated as a well-known reagent which has the nature of aggregation-induced emission (AIE), but has never been reported in the liquid chromatography stationary phase.
