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Visions in Leisure and Business ; 23(1):25-37, 2021.
Article in English | CAB Abstracts | ID: covidwho-1727266


This article explores the impacts of COVID-19 on the tourism, leisure, entertainment, sports, hospitality, and related industries. It focuses mostly on long-lasting impacts of the pandemic and has numerous ideas regarding the management and marketing of these interrelated industries in the wake of the crisis. It also looks at preparation for future crises in these industries.

Environ Sci Technol ; 55(7): 4103-4114, 2021 04 06.
Article in English | MEDLINE | ID: covidwho-1392753


Intensified efforts to curb transmission of the Severe Acute Respiratory Syndrome Coronavirus-2 might lead to an elevated concentration of disinfectants in domestic wastewater and drinking water in China, possibly resulting in the generation of numerous toxic disinfection byproducts (DBPs). In this study, the occurrence and distribution of five categories of DBPs, including six trihalomethanes (THMs), nine haloacetic acids (HAAs), two haloketones, nine nitrosamines, and nine aromatic halogenated DBPs, in domestic wastewater effluent, tap water, and surface water were investigated. The results showed that the total concentration level of measured DBPs in wastewater effluents (78.3 µg/L) was higher than that in tap water (56.0 µg/L, p = 0.05), followed by surface water (8.0 µg/L, p < 0.01). Moreover, HAAs and THMs were the two most dominant categories of DBPs in wastewater effluents, tap water, and surface water, accounting for >90%, respectively. Out of the regulated DBPs, none of the wastewater effluents and tap water samples exceeded the corresponding maximum guideline values of chloroform (300 µg/L), THM4 (80 µg/L), NDMA (100 ng/L), and only 2 of 35 tap water samples (67.6 and 63.3 µg/L) exceeded the HAA5 (60 µg/L) safe limit. HAAs in wastewater effluents showed higher values of risk quotient for green algae. This study illustrates that the elevated use of disinfectants within the guidance ranges during water disinfection did not result in a significant increase in the concentration of DBPs.

COVID-19 , Disinfectants , Drinking Water , Water Pollutants, Chemical , Water Purification , China , Disinfectants/analysis , Disinfection , Drinking Water/analysis , Humans , Pandemics , SARS-CoV-2 , Trihalomethanes/analysis , Water , Water Pollutants, Chemical/analysis
Cell Metab ; 33(8): 1655-1670.e8, 2021 08 03.
Article in English | MEDLINE | ID: covidwho-1233395


How amphipathic phospholipids are shuttled between the membrane bilayer remains an essential but elusive process, particularly at the endoplasmic reticulum (ER). One prominent phospholipid shuttling process concerns the biogenesis of APOB-containing lipoproteins within the ER lumen, which may require bulk trans-bilayer movement of phospholipids from the cytoplasmic leaflet of the ER bilayer. Here, we show that TMEM41B, present in the lipoprotein export machinery, encodes a previously conceptualized ER lipid scramblase mediating trans-bilayer shuttling of bulk phospholipids. Loss of hepatic TMEM41B eliminates plasma lipids, due to complete absence of mature lipoproteins within the ER, but paradoxically also activates lipid production. Mechanistically, scramblase deficiency triggers unique ER morphological changes and unsuppressed activation of SREBPs, which potently promotes lipid synthesis despite stalled secretion. Together, this response induces full-blown nonalcoholic hepatosteatosis in the TMEM41B-deficient mice within weeks. Collectively, our data uncovered a fundamental mechanism safe-guarding ER function and integrity, dysfunction of which disrupts lipid homeostasis.

Endoplasmic Reticulum , Phospholipids , Animals , Endoplasmic Reticulum/metabolism , Homeostasis , Lipogenesis , Lipoproteins/metabolism , Membrane Proteins/genetics , Membrane Proteins/metabolism , Mice , Phospholipids/metabolism