Fish and shellfish are important sources of high quality lipids, especially omega-3 long-chain polyunsaturated fatty acids. In most countries, seafood is eaten cooked to eliminate any potential parasites and pathogens. In addition, cold storage plays an important role in extending the shelf life of seafood. However, both cooking and storage processes can cause alterations in the lipid content and fatty acid profile of fish and shellfish. Although the lipid nutritional quality of fish and shellfish have recently been reviewed, these reviews mainly focus on raw seafood, and information on the impact of food processing on the lipid nutritional quality of fish and shellfish still lacks coherence. Therefore, this study was carried out to provides a critical reviews on the effects of food processing, especially cooking and cold storge, on the lipid nutritional quality of fish and shellfish. Overall, from the perspective of lipid nutritional quality, baking and steaming are the most recommended cooking methods for fish and shellfish, respectively, while it is strongly not recommended to fry seafood with margarine. For cold storage, 3 days and 2 weeks are the most recommended storage periods for refrigeration and frozen storage, respectively. This article can provides consumers with useful information to choose food preparation and storage methods based on their personal interest in specific lipid nutritional quality indicators.
Fluxes and composition dynamics of atmospheric nitrogen deposition play key roles in better balancing economic development and ecological environment. However, there are some knowledge gaps and difficulties in urban ecosystems, especially for small and medium-sized cities. In this study, both flux and composition (ratio of NH4+-N to NO3--N, RN) of wet-deposited dissolved inorganic nitrogen (DIN, sum of NO3--N and NH4+-N) were estimated and sources were identified at a long-term urban observation station in Tongling, a typical medium-sized city in eastern China during 2010-2016, respectively. Results showed that wet-deposited DIN fluxes were 33.20 and 28.15 kgN ha-1 yr-1 in Tongling city during 2010-2011 and 2015-2016, respectively. Compared to these two periods, both DIN and NO3--N fluxes decreased by 15.2% and 31.8% for a series of NOx abatement measures applied effectively, respectively. At the same time, the NH4+-N flux remained stable and ranged from 19.53 to 20.62 kgN ha-1 yr-1, and the RN increased from 1.7 to 2.2. Seasonally, winds from the southwest and west-southwest with higher frequencies and speeds in spring and summer brought more NH4+-N and DIN wet deposition from an ammonia plant, which could threaten the safety of regional hydrosphere ecosystems. On the whole, the wet-deposited NH4+-N was threatening regional ecosystems of both the hydrosphere and forest. The wet-deposited DIN including NH4+-N in Tongling city stemmed mainly from a combined source of coal combustion and dust from Cu extraction and smelting, ammonia production, and roads. Therefore, production lines should be updated for Cu extraction and smelting industries, thermal power generations and the ammonia plant, old vehicles should be eliminated, and the use of new energy vehicles should be promoted for regional sustainable development and human health in the medium-sized city.
Employment among final year college students in China has encountered unprecedented difficulties during the Coronavirus disease 2019 (COVID-19) pandemic, the high unemployment rate had led college graduates faced inadvertently mental health issues such as anxiety and depression. This study aims to investigate the impact of employment stress on college students' psychological well-being during the COVID-19 pandemic in China. An online survey consisting of demographic items (i.e., age, gender, subject major, type of university, and perceived severity of the current employment situation), Employment Stress scale, Employment Anxiety Scale, and Patient Health Questionnaire was employed for data collection. A total of 2,627 final year college students were recruited, with participants displayed below moderate levels of employment stress and anxiety. Approximately 13.2% of participants were depressed and 53.3% considered the current employment situation as severe. Female students were stressed by individual factors and anxious, whilst male students were more depressed. Arts students were less depressed and students from comprehensive universities were more depressed and anxious compared to other types of universities. Students who perceived the employment situation as very severe displayed the lowest level of employment stress and anxiety. Gender, university type, family stress, college stress, and individual stress are predictors of psychological well-being among college students. The family environment, female identity, and stress from university play a crucial role in college students' psychological well-being. The government should pay more attention to the psychological well-being of graduate students and develop feasible measures to help them secure a job during this unprecedented time.