科研成果

Coastal sediment cores provide important records of land-based antibiotics' deposition. This study examined sediment cores from the Hangzhou Bay, East China Sea, dating back to 1980–2020 using 210Pbex. The 40-year analysis revealed a mismatch between sediment depth and age. Wastewater treatment facilities have significantly reduced antibiotics discharge into the sea. We identified 27 antibiotics, with enrofloxacin (ERFX) and nadifloxacin (NDFX) exhibiting the highest average concentrations of 84.9 and 83.4 ng/g, respectively. Quinolones (QNs) were prominent, displaying strong co-occurrence and similar distribution patterns shaped by comparable soil-water distribution coefficient (Kd). QNs correlated positively with total antibiotic concentration, serving as indicators. We proposed a multi-dimensional risk assessment of antibiotics, encompassing ecological and antimicrobial resistance (AMR) risks, complementing each other. The assessment revealed antibiotics with distinct risks: sulfacetamide (SCM) and clindamycin (CLIN) exhibited high ecological risks, while ERFX, ciprofloxacin (CFX), norfloxacin (NFX), gatifloxacin (GTFX), moxifloxacin (MXFX), and marbofloxacin (MBFX) presented high AMR risks.

CO2 flooding is considered one of the most important methods for reducing CO2 emissions and increasing oil production from reservoirs. However, the challenges of low recovery rates and poor economic benefits in CO2 immiscible flooding significantly hinder its widespread application. To address these issues, this paper proposes the use of ultrasonic-assisted CO2 immiscible flooding to enhance oil recovery (EOR) and analyzes its underlying mechanisms. First, the distribution characteristics of residual oil in CO2 immiscible flooding were examined using high pressure mercury injection (HPMI), nuclear magnetic resonance (NMR), and microscopic visualization displacement (MVD) experiments. Next, the changes in oil recovery and residual oil distribution after applying ultrasonic-assisted CO2 immiscible flooding were analyzed. Finally, the mechanism of EOR through ultrasonic-assisted CO2 immiscible flooding was summarized based on the results of interfacial tension (IFT) tests. The findings indicate that the recovery rate of CO2 immiscible flooding without ultrasound is 53.33 %, with residual oil primarily distributed in the form of films and flakes within the pores. The ultrasonic assisted CO2 immiscible flooding with frequency of 28 KHz and power of 200 W was provided by ultrasonic horn, and the recovery rate increased by 62.84 % after 60 min. With ultrasonic assistance, the recovery rate increased to 62.84 %, and the maximum radius of residual oil droplets was reduced from 81.8 μm to 36.5 μm. Additionally, the amount of residual oil in the 0.1 μm to 1 μm range slightly decreased, suggesting that ultrasonic assistance mainly improves the recovery of flake residual oil, with a slight improvement in film residual oil recovery as well. Ultrasound can enlarge the pore and throat radius and reduce the interfacial tension in the CO2-oil system, allowing more flake residual oil to be displaced. Moreover, the high-frequency vibrations of the ultrasound can reduce the thickness of the oil film, enhancing the recovery of film residual oil. This study supports the further application of ultrasonic-assisted CO2 immiscible flooding in both scientific research and engineering practice.

Physical literacy is a unifying concept that encompasses the physical competence, knowledge and understanding, motivation and confidence for engagement in life-long physical activity. In this study, we conducted a random-effects meta-analysis with meta-regression to examine (a) whether existing interventions were effective in enhancing individual's physical literacy and physical activity engagement, and (b) which factors moderated effectiveness of the interventions. The protocol of the meta-analysis was pre-registered in PROSPERO (Ref: CRD42020213898) on November 22, 2020. Specifically, a comprehensive literature search was conducted, and studies that evaluated any controlled intervention aimed to enhance physical literacy were included. Studies using either randomized or non-randomized designs were included. Intervention effects pertaining to each physical literacy component and activity engagement were pooled using a meta-analytical approach. Using meta-regressions, we investigated if study effects were moderated by characteristics of the interventions. Of the 29 studies included in the analyses, interventions successfully increased: physical competence (k = 18, g = 0.57), knowledge and understanding (k = 13, g = 0.55), motivation and confidence (k = 12, g = 0.44), global physical literacy (k = 27, g = 0.52), and engagement in physical activity (k = 13, g = 0.14). Intervention effects were weaker in school or university settings compared to non-educational settings and a positive bias for studies with smaller samples was found. While these findings were robust, long-term effectiveness of interventions should be further examined, as most included studies only evaluated short-term effects. Systematic approaches for the design and reporting of intervention components are also needed to help researchers design effective and scalable interventions in the future.

The fitness body ideal, disseminated through the culture of fitspiration on social media, is frequently framed as a symbol of health, empowerment, and self-discipline. However, its implications warrant critical scrutiny due to its deep entanglement with body dissatisfaction and psychological distress. Unlike the thin ideal, historically linked to patriarchal oppression through Michel Foucault’s concept of the disciplinary society, the fit ideal introduces a more complex paradox. It simultaneously embodies elements of self-sexualisation and objectification while intertwining ostensibly positive discourses of strength, agency, and self-care with hidden mechanisms of control. This theoretical analysis explores how the fit ideal extends beyond the disciplinary mechanisms of the thin ideal, occupying a dual role that merges empowerment narratives with the pressures of self-optimisation. Through Byung-Chul Han’s conceptualisations of the achievement society and psychopolitics, this paper examines how the ideal of self-improvement fosters self-surveillance, body dissatisfaction, and self-exploitation. The neoliberal logic of self-optimisation, embedded in fitness culture, constructs the body as an ongoing project of enhancement, where failure to maintain the fit ideal becomes an internalised moral shortcoming. This relentless pursuit of bodily perfection may lead to cycles of exhaustion, anxiety, and, ultimately, burnout, as individuals strive to meet ever-escalating standards of self-discipline and productivity. Reclaiming the female body and embodied experiences necessitates a critical interrogation of these ideals and their intersections with neoliberal selfhood, consumer culture, and the commodification of feminism. By interrogating the power dynamics that sustain these ideals, this analysis offers a nuanced understanding of how contemporary fitness culture simultaneously engages feminist empowerment discourses while reinforcing the relentless pursuit of self-optimisation in the 21st century. Recognising and challenging these structures is essential to disrupting the insidious forms of control that masquerade as agency and empowerment.