Gondwana Research最新文献

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Constraining the extent of Greater India: New late Paleocene paleomagnetic data from the Tethyan Himalaya, Tibetan Plateau 制约大印度的范围:来自青藏高原哲罗喜马拉雅山脉的新的古新世晚期古地磁数据
IF 7.2 1区 地球科学
Gondwana Research Pub Date : 2024-11-14 DOI: 10.1016/j.gr.2024.11.004
Yong Cao , Zhiming Sun , Zhenyu Yang , Haibing Li , Junling Pei , Xiaozhou Ye , Xinwen Cao , Bailing Wu , Chenguang Liu , Lei Zhang
{"title":"Constraining the extent of Greater India: New late Paleocene paleomagnetic data from the Tethyan Himalaya, Tibetan Plateau","authors":"Yong Cao ,&nbsp;Zhiming Sun ,&nbsp;Zhenyu Yang ,&nbsp;Haibing Li ,&nbsp;Junling Pei ,&nbsp;Xiaozhou Ye ,&nbsp;Xinwen Cao ,&nbsp;Bailing Wu ,&nbsp;Chenguang Liu ,&nbsp;Lei Zhang","doi":"10.1016/j.gr.2024.11.004","DOIUrl":"10.1016/j.gr.2024.11.004","url":null,"abstract":"<div><div>The collision of India and Asia formed the Himalayas and caused the uplift of the Tibetan Plateau. Greater India comprises the part of the Indian plate that was subducted beneath Asia and the Tethyan Himalaya. Quantitative constraints on the extent of Greater India are needed to study the process of the India-Asia collision. However, such constraints are lacking and the topic remains debated. We present paleomagnetic data from late Paleocene (∼58 Ma) mafic rocks from the western Tethyan Himalaya. The mean paleomagnetic direction is <em>Ds</em>/<em>Is</em> = 348.5°/+6.5° with <em>k</em> = 38.7 and <em>a<sub>95</sub></em> = 5.2°, which passed the fold, reversals, and paleosecular variation tests. The results define the paleolatitude of the Tethyan Himalaya as 3.3 ± 4.5°N at ∼ 58 Ma for the reference site of 29.9°N/83.3°E. A comparison of the Paleogene paleolatitudes of the Tethyan Himalaya shows that the terrane moved northward by 1540 ± 290 km between ∼ 60 Ma and ∼ 50 Ma, with a rate of movement of 15.4 ± 2 cm/yr. The new paleomagnetic result confirms that the extent of Greater India was 1130 ± 400 km and was essentially uniform from east to west. This finding implies that the collision between India and Asia was nearly be quasi-synchronous from the middle-eastern to western segments along the Indus-Tsangpo suture zone.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 128-138"},"PeriodicalIF":7.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Early Devonian stylonurine eurypterids from northern Gondwana: Late Lochkovian to early Pragian records from South China 来自冈瓦纳北部的早泥盆世stylonurine极龙类:来自华南的晚洛克维期至早期普拉格期记录
IF 7.2 1区 地球科学
Gondwana Research Pub Date : 2024-11-14 DOI: 10.1016/j.gr.2024.11.003
Zhiheng Ma , James C. Lamsdell , Maxwell Wang , Jingwen Chen , Paul A. Selden , Ben He
{"title":"Early Devonian stylonurine eurypterids from northern Gondwana: Late Lochkovian to early Pragian records from South China","authors":"Zhiheng Ma ,&nbsp;James C. Lamsdell ,&nbsp;Maxwell Wang ,&nbsp;Jingwen Chen ,&nbsp;Paul A. Selden ,&nbsp;Ben He","doi":"10.1016/j.gr.2024.11.003","DOIUrl":"10.1016/j.gr.2024.11.003","url":null,"abstract":"<div><div>This paper describes a new stylonurine eurypterid: <em>Qujingopterus spineus</em> gen. et sp. nov., from the Early Devonian (late Lochkovian to early Pragian) Xitun formation of Yunnan Province, South China. This discovery represents one of the earliest stylonurine records from Gondwana and further supports the global distribution of stylonurines. Considering the probable region of origin of the clade and and their lack of anatomical structures adapted for swimming, we propose that stylonurines migrated to Gondwana as the Rheic Ocean dwindled while Gondwana rapidly approached Laurussia. An additional specimen from this locality is described, and can be assigned to the eurypterine family Pterygotidae. Based on the environmental analysis, it can be inferred that the eurypterids from South China underwent adaptations to cope with decreasing salinity levels. This discovery provides valuable insights into the timing and mechanisms underlying eurypterid invasion into freshwater ecosystems.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 118-127"},"PeriodicalIF":7.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Scrutinizing the load capacity curve for a global perspective: The role of Fintech, government effectiveness and renewable energy 从全球视角审视负载能力曲线:金融科技、政府效率和可再生能源的作用
IF 7.2 1区 地球科学
Gondwana Research Pub Date : 2024-11-08 DOI: 10.1016/j.gr.2024.10.014
Ugur Korkut Pata , Kamel Si Mohammed , Cheloufi Omeyr , Selin Karlilar Pata , Hind Alofaysan , Mustafa Tevfik Kartal
{"title":"Scrutinizing the load capacity curve for a global perspective: The role of Fintech, government effectiveness and renewable energy","authors":"Ugur Korkut Pata ,&nbsp;Kamel Si Mohammed ,&nbsp;Cheloufi Omeyr ,&nbsp;Selin Karlilar Pata ,&nbsp;Hind Alofaysan ,&nbsp;Mustafa Tevfik Kartal","doi":"10.1016/j.gr.2024.10.014","DOIUrl":"10.1016/j.gr.2024.10.014","url":null,"abstract":"<div><div>With the evolving world order, countries are using financial technologies (Fintech) to access financial resources more effectively, and Fintech can have an impact on the environment. This study aims to investigate the influence of Fintech on ecological sustainability, focusing on the contribution of renewable energy (RE) and government effectiveness (GE) under the Load Capacity Curve (LCC). This research analyzes data from 69 middle-income economies between 2006 and 2022 using the dynamic panel threshold model (DPTR). The outcomes document that GDP reduces the LCF below a certain threshold, but a positive impact above this threshold. Specifically, the model yielded a threshold value of $US 5222.234, which is higher than the average GDP of $US 4276.802. This finding suggests a U-shaped relationship between GDP and LCF, which supports the LCC hypothesis. The outcome also reports that Fintech plays a crucial role in improving ecological sustainability, while government effectiveness has a negative effect. The study emphasizes that middle-income countries should support Fintech and renewable energy along development with economic progress to improve ecological quality.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 104-117"},"PeriodicalIF":7.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Crustal thickening, exhumation and metamorphic cooling of Neoproterozoic eclogites in NE Brazil: Timescale for the assembly of West Gondwana 巴西东北部新元古代蚀变岩的地壳增厚、剥蚀和变质冷却:西冈瓦纳组装的时间尺度
IF 7.2 1区 地球科学
Gondwana Research Pub Date : 2024-11-07 DOI: 10.1016/j.gr.2024.11.001
Alanielson Ferreira , Gary Stevens , Elton L. Dantas , Reinhardt A. Fuck , Ticiano J.S. dos Santos
{"title":"Crustal thickening, exhumation and metamorphic cooling of Neoproterozoic eclogites in NE Brazil: Timescale for the assembly of West Gondwana","authors":"Alanielson Ferreira ,&nbsp;Gary Stevens ,&nbsp;Elton L. Dantas ,&nbsp;Reinhardt A. Fuck ,&nbsp;Ticiano J.S. dos Santos","doi":"10.1016/j.gr.2024.11.001","DOIUrl":"10.1016/j.gr.2024.11.001","url":null,"abstract":"<div><div>The high-pressure followed by high-temperature metamorphism related to the evolution of collisional orogens is the expected Pressure-Temperature-time (P-T-t) path for modern-style plate tectonics. However, these P-T-t paths are rarely preserved even in Phanerozoic orogens. In this matter, the Campo Grande migmatite-gneiss area presents an exhumed Archean crust with heterogeneous retrograde eclogites overprinted by amphibolite-facies in NE Brazil. Retrogressed eclogites in the area core are formed by Mn-rich garnet + clinopyroxene porphyroblasts layer with a minor amphibole + quartz + titanite assemblage, whereas the margins display dismembered lenses of Mg-rich garnet porphyroblasts with plagioclase + amphibole coronae and clinopyroxene + plagioclase + ortopyroxene sympleticte mainly within shear zones. Phase equilibria modelling reveals that these distinct <em>retro</em>-eclogites record similar eclogite conditions (up to 18 kbar and 660 ± 20 °C). Mn-rich eclogites display widespread magmatic zoned zircon grains from Mesoarchean to Paleoproterozoic and recrystallized metamorphic grains of 607.7 ± 5.4 Ma. Zircon from Mg-rich eclogites crystallized at 2.67 Ga and overgrowth rims formed at 2.0 Ga and 590.1 ± 1.8 Ma. REE in zircon lack Eu anomaly, displaying flat HREE patterns in 590.1 ± 1.8 Ma Neoproterozoic grains indicate recrystallization under eclogite-facies conditions. In situ U-Pb titanite dating yielded two younger age sets at 574.7 ± 0.5 and 562.8 ± 2.1 Ma. Lastly, in situ U-Pb dating of rutile inclusions in garnet cores present ages of 606.1 ± 4.0 Ma, whereas rutile included in retrograde coronae and sympleticte yielded concordant ages from 559.0 ± 2.3 to 523.2 ± 1.9 Ma. Thus, combined phase equilibria modelling and U-Pb ages reveal a progressive change in metamorphic conditions from eclogite conditions (at least 607.7 ± 5.4 to 590 ± 1.8 Ma; zircon dating and rutile ages included in eclogite garnet) to nearly isothermal decompression (574.7 ± 0.5 Ma; titanite age) of ancient Archean deep crust, which was followed by suggested final exhumation and metamorphic cooling at shallower crustal levels between 559.0 ± 2.3 and 523.2 ± 1.9 Ma (rutile age in retrogressed assemblage). Therefore, the high-pressure conditions followed by decompression and metamorphic cooling during sin- to post-collisional settings were associated with the final assembly of West Gondwana.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 70-88"},"PeriodicalIF":7.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced landslide susceptibility mapping in data-scarce regions via unsupervised few-shot learning 在数据稀缺地区,通过无监督的 "少量镜头学习 "增强滑坡易感性绘图
IF 7.2 1区 地球科学
Gondwana Research Pub Date : 2024-11-04 DOI: 10.1016/j.gr.2024.10.011
Linghao Kong , Wenkai Feng , Xiaoyu Yi , Zhenghai Xue , Luyao Bai
{"title":"Enhanced landslide susceptibility mapping in data-scarce regions via unsupervised few-shot learning","authors":"Linghao Kong ,&nbsp;Wenkai Feng ,&nbsp;Xiaoyu Yi ,&nbsp;Zhenghai Xue ,&nbsp;Luyao Bai","doi":"10.1016/j.gr.2024.10.011","DOIUrl":"10.1016/j.gr.2024.10.011","url":null,"abstract":"<div><div>Given the critical need to assess landslide hazards, producing landslide susceptibility map (LSM) in regions with scarce historical landslide inventories poses significant challenges. This study introduces a novel landslide susceptibility assessment framework that combines unsupervised learning strategies with few-shot learning methods to increase the accuracy of LSM in these areas. The framework has been practically validated in a representative geological disaster-prone area along the West-East Gas Pipeline in Shaanxi Province, China. We employed three advanced few-shot learning models: a support vector machine, <em>meta</em>-learning, and transfer learning. These models implement feature representation learning for weakly correlated influencing factors through an unsupervised approach, thereby constructing an effective landslide susceptibility assessment model. We compared traditional learning methods and used the receiver operating characteristic (ROC) curve and SHAP values to quantify the effectiveness of the models. The results indicate that the <em>meta</em>-learning algorithm outperforms both the SVM and transfer learning in areas with limited landslide data. The integration of unsupervised strategies significantly improves performance, achieving area under the curve (AUC) values of 0.9385 and 0.9861, respectively. Compared with using <em>meta</em>-learning alone, incorporating unsupervised learning strategies increased the AUC by 4.76%, enhancing both the predictive power of the model and the interpretability of the features. Meta-learning under unsupervised conditions effectively mitigates the evaluation difficulties caused by insufficient landslide records, providing a viable path and empirical evidence for performance improvement in similar data- scarce regions worldwide.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 31-46"},"PeriodicalIF":7.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anatomy of the late Pennsylvanian to early Triassic failed rift system of the Cooper Basin, eastern Australia 澳大利亚东部库珀盆地宾夕法尼亚晚期至三叠纪早期失败裂谷系统剖面图
IF 7.2 1区 地球科学
Gondwana Research Pub Date : 2024-10-24 DOI: 10.1016/j.gr.2024.09.017
Carmine C. Wainman , Peter J. McCabe
{"title":"Anatomy of the late Pennsylvanian to early Triassic failed rift system of the Cooper Basin, eastern Australia","authors":"Carmine C. Wainman ,&nbsp;Peter J. McCabe","doi":"10.1016/j.gr.2024.09.017","DOIUrl":"10.1016/j.gr.2024.09.017","url":null,"abstract":"<div><div>The onshore intracratonic Cooper Basin of eastern Australia developed during the Late Pennsylvanian to Middle Triassic periods at paleolatitudes of approximately 50°S within the Gondwanan sector of Pangea. Despite the wealth of data available, including the drilling of over 4,800 boreholes, there is limited knowledge about the Cooper Basin’s origins and evolution. To better understand the basin’s geological history, legacy data sets, including composite 2D seismic sections, well logs, measured sections, and 1D burial history models from the west of the basin, are integrated to reinterpret the basin’s tectonic and sedimentary evolution. Interpretation of the seismic sections and calculated subsidence rates indicates an earlier active rift phase with grabens and half-grabens that transitioned, in the latest Permian, into a regional sag phase. The evolution of tectonic styles heavily influenced the paleogeographic evolution of the basin fill and resulting depositional architecture. The basin sediments are entirely terrestrial in nature and facies reflect a transition from glacial environments in the late Pennsylvanian to warmer and drier conditions in the early Triassic. During much of the Permian the basin was underfilled and the relative low influx of fluvial sediment did not keep pace with creation of accommodation, allowing the development of extensive mire and lake systems. Coal beds are up to 30 m thick. By contrast, the basin appears to have been overfilled during the latest Permian to Triassic with rivers flowing along the central axis of the basin. The synchroneity of commencement of rifting, termination of rifting, and commencement of a sag phase within the failed rift systems of the Cooper Basin, the East Gondwana Interior Rift, and the East Australian Rift strongly suggests a continent-wide period of extension related to significant changes in plate motions during the Late Pennsylvanian to Middle Triassic.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 47-69"},"PeriodicalIF":7.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of artificial intelligence technology applications on corporate energy consumption intensity 人工智能技术应用对企业能源消耗强度的影响
IF 7.2 1区 地球科学
Gondwana Research Pub Date : 2024-09-26 DOI: 10.1016/j.gr.2024.09.003
Xiaoqian Liu , Javier Cifuentes-Faura , Shikuan Zhao , Long Wang , Jian Yao
{"title":"Impact of artificial intelligence technology applications on corporate energy consumption intensity","authors":"Xiaoqian Liu ,&nbsp;Javier Cifuentes-Faura ,&nbsp;Shikuan Zhao ,&nbsp;Long Wang ,&nbsp;Jian Yao","doi":"10.1016/j.gr.2024.09.003","DOIUrl":"10.1016/j.gr.2024.09.003","url":null,"abstract":"<div><div>Artificial intelligence (AI), as a new technology, not only revolutionizes economic development, but also provides an opportunity for environment governance. Extant studies primarily explore the environmental performance of AI from a macro perspective, while evidence on how AI technology applications affect firms’ energy-saving behavior is scarce. Employing Python technology to recognize AI-related keywords in the annual reports of listed enterprises and adopting data on corporate energy consumption from 2011 to 2020, we explore the impact of AI on corporate energy consumption intensity (CECI) and its mechanisms. We observe that AI technology applications reduce CECI. After a range of robustness tests, the conclusions are still solid. The mechanism analysis reveals that AI cuts CECI through spurring firm green innovation, stimulating firms to introduce new equipment, and reducing firms’ internal management costs. Heterogeneity analysis reveals that this negative impact is more prominent for SOEs and private enterprises’ energy intensity; we also find that this effect is more pronounced for high-tech industry enterprises and high-polluting enterprises. Our findings provide micro evidence for policymakers to reduce corporate energy intensity and realize energy conservation and emission abatement targets.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 89-103"},"PeriodicalIF":7.2,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Black fungus outbreak in India – A direct consequence of COVID-19 surge: A myth or reality 印度爆发黑菌病——COVID-19激增的直接后果:神话还是现实
IF 6.1 1区 地球科学
Gondwana Research Pub Date : 2023-02-01 DOI: 10.1016/j.gr.2021.12.016
Archana Sharma , Megha Bedi , Prachi Patel , Amarpreet Singh Arora
{"title":"Black fungus outbreak in India – A direct consequence of COVID-19 surge: A myth or reality","authors":"Archana Sharma ,&nbsp;Megha Bedi ,&nbsp;Prachi Patel ,&nbsp;Amarpreet Singh Arora","doi":"10.1016/j.gr.2021.12.016","DOIUrl":"10.1016/j.gr.2021.12.016","url":null,"abstract":"<div><p>The deadly second wave of COVID-19 has seen an unprecedented surge in mucormycosis associated mortality in India, overwhelming the heath authorities with challenges beyond measure. Also known as black fungus, this life-threatening fungal infection usually manifests in the nose, spreads to the eyes, and in some cases also to the brain. Immune suppression, pre-existing conditions, prolonged and indiscriminate use of steroids, and unhygienic environments are some of the widely recognized risk factors for contracting black fungus in individuals recovered from COVID-19. However, diagnosis of the infection remains insufficient due to the lack a holistic understanding of the possible risks, symptoms, and exposure pathways and therefore no definite protocol exists for managing this fatal infection. Here, we synthesize the current state of knowledge on black fungus outbreak in India and identify key gaps in its understanding with respect to potential risk factors leading to the widespread infection. We looked at 3354 black fungus cases in India, enlisting ailment history (particularly diabetes) and steroid usage in COVID-19 patients as the key factors responsible for exacerbating risks associated with the disease. However, we also press on the possibilities that other less studied non-traditional risk factors may also have a role in causing the infection. Black fungus is therefore a reality of COVID-19, with or without diabetes or steroid use needs to be investigated. We believe such a review is imperative for making informed decisions specially around timely diagnosis and channelizing efforts in controlling the spread of COVID-19 associated mucormycosis.</p></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"114 ","pages":"Pages 117-123"},"PeriodicalIF":6.1,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8816797/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9839896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Does atmospheric dimethyldiselenide play a role in reducing COVID-19 mortality? 大气中的二甲基二硒胺是否在降低COVID-19死亡率方面发挥作用?
IF 6.1 1区 地球科学
Gondwana Research Pub Date : 2023-02-01 DOI: 10.1016/j.gr.2022.05.017
Jinsong Zhang , Ethan Will Taylor , Kate Bennett , Margaret P. Rayman
{"title":"Does atmospheric dimethyldiselenide play a role in reducing COVID-19 mortality?","authors":"Jinsong Zhang ,&nbsp;Ethan Will Taylor ,&nbsp;Kate Bennett ,&nbsp;Margaret P. Rayman","doi":"10.1016/j.gr.2022.05.017","DOIUrl":"10.1016/j.gr.2022.05.017","url":null,"abstract":"<div><p>Environmental selenium (Se) distribution in the US is uneven, yet US residents appear to have a relatively narrow range of serum Se concentrations, according to the NHANES III survey data; this is probably due to the modern food-distribution system. In the US, Se concentration in alfalfa leaves has been used as a proxy for regional Se exposure (low, medium or high, corresponding to ≤ 0.05, 0.06–0.10 and ≥ 0.11 ppm respectively). Se in plants, soil, water, and bacteria can be transformed into volatile dimethyldiselenide, which can be inhaled and excreted via the lung. Hence, pulmonary Se exposure may be different in states with different atmospheric Se levels. We found a significantly higher death rate from COVID-19 in low-Se states than in medium-Se or high-Se states, though the case densities of these states were not significantly different. Because inhaled dimethyldiselenide is a potent inducer of nuclear-factor erythroid 2 p45-related factor 2 (Nrf2), exposure to higher atmospheric dimethyldiselenide may increase Nrf2-dependent antioxidant defences, reducing the activation of NFκB by SARS-CoV-2 in the lung, thereby decreasing cytokine activation and COVID-19 severity. Atmospheric dimethyldiselenide may thereby play a role in COVID-19 mortality, although the extent of its involvement is unclear.</p></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"114 ","pages":"Pages 87-92"},"PeriodicalIF":6.1,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9170275/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10643733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Pollution free UV-C radiation to mitigate COVID-19 transmission 无公害UV-C辐射,减少COVID-19传播
IF 6.1 1区 地球科学
Gondwana Research Pub Date : 2023-02-01 DOI: 10.1016/j.gr.2022.07.010
Ashutosh Kumar , Abhishek Raj , Ankit Gupta , Sneha Gautam , Manish Kumar , Hemant Bherwani , Avneesh Anshul
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引用次数: 3
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