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Preliminary geological interpretation of long-wavelength magnetic anomalies over China and surrounding regions

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Earth and Planetary Physics 2024年第3期8卷 445-458页

作者： Jie Wang YanYan Yang ZhiMa Zeren Jian Wang Xin Wang YuXin Luo XuHui Shen National Institute of natural Hazards Ministry of Emergency Management of ChinaBeijing 100085China Key Laboratory of Compound and Chained natural Hazards Dynamics Ministry of Emergency Management of ChinaBeijing 100085China school of Emergency Management Science and Engineering University of Chinese Academy of SciencesBeijing 100049China National Space Science Center Chinese Academy of SciencesBeijing 100190China

Long-wavelength(>500 km)magnetic anomalies originating in the lithosphere were first found in satellite magnetic *** to the striking magnetic anomalies around the world,the long-wavelength magnetic anomalies in China and surrounding regions are relatively *** research on each of these anomalies has been quite inadequate;their geological origins remain unclear,in particular their connection to tectonic activity in the Chinese and surrounding *** focus on six magnetic high anomalies over the(1)Tarim Basin,(2)Sichuan Basin(3)Great Xing’an Range,(4)Barmer Basin,(5)Central Myanmar Basin,and(6)Sunda and Banda Arcs,and a striking magnetic low anomaly along the southern part of the Himalayan-Tibetan *** have analyzed their geological origins by reviewing related research and by detailed comparison with geological *** tectonic backgrounds for these anomalies belong to two cases:either ancient basin basement,or subduction-collision ***,the geological origins of large-scale regional magnetic anomalies are always subject to dispute,mainly because of limited surface exposure of sources,later tectonic destruction,and superposition of multi-phase events.

关键词： long-wavelength magnetic anomaly lithospheric magnetic anomaly lithospheric magnetic field model satellite magnetic survey CSES

Mannogalactoglucan from mushrooms protects pancreatic islets via restoring UPR and promotes insulin secretion in TIDM mice

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Food Science and Human Wellness 2024年第3期13卷 1390-1401页

作者： Ting Liu Si Chen Yunhe Qu Lujuan Zheng Xiaoxuan Yang Shuhan Men Yuanning Wang Hanrui Ma Yifa Zhou Yuying Fan Engineering Research Center of Glycoconjugates Ministry of EducationJilin Provincial Key Laboratory of Chemistry and Biology of Changbai Mountain Natural DrugsSchool of Life SciencesNortheast Normal UniversityChangchun 130024China

Type 1 diabetes mellitus(T1DM) lacks insulin secretion due to autoimmune deficiency of pancreaticβ-*** pancreatic islets and enhancing insulin secretion has been therapeutic *** is the main type of polysaccharide from natural mushroom,which has potential medicinal ***,the antidiabetic property of mannogalactoglucan in T1DM has not been fully *** this study,we obtained the neutral fraction of alkali-soluble Armillaria mellea polysaccharide(AAMP-N) with the structure of mannogalactoglucan from the fruiting body of *** and investigated the potential therapeutic value of AAMP-N in *** demonstrated that AAMP-N lowered blood glucose and improved diabetes symptoms in T1DM ***-N activated unfolded protein response(UPR) signaling pathway to maintain ER protein folding homeostasis and promote insulin secretion in *** that,AAMP-N promoted insulin synthesis via upregulating the expression of transcription factors,increased Ca^(2+) signals to stimulate intracellular insulin secretory vesicle transport via activating calcium/calmodulin-dependent kinase Ⅱ(CamkⅡ) and cAMP/PKA signals,and enhanced insulin secretory vesicle fusion with the plasma membrane via vesicle-associated membrane protein 2(VAMP2).Collectively,these studies demonstrated that the therapeutic potential of AAMP-N on pancreatic islets function,indicating that mannogalactoglucan could be natural nutraceutical used for the treatment of T1DM.

关键词： Mannogalactoglucan Mushroom Pancreatic islets Insulin secretion Insulin synthesis Unfolded protein response(UPR) Type 1 diabetes mellitus(T1DM)

Quantitative Identification of Delamination Damage in Composite Structure Based on Distributed Optical Fiber Sensors and Model Updating

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Structural Durability & Health Monitoring 2024年第6期18卷 785-803页

作者： Hao Xu Jing Wang Rubin Zhu Alfred Strauss Maosen Cao Zhanjun Wu school of Materials Science and Engineering Dalian University of TechnologyDalian116000China school of Mechanics and Aerospace Engineering Dalian University of TechnologyDalian116000China Department of Civil Engineering and natural Hazards University of Natural Resources and Life SciencesVienna1180Austria Department of Engineering Mechanics Hohai UniversityNanjingChina

Delamination is a prevalent type of damage in composite laminate *** accumulation degrades structural performance and threatens the safety and integrity of *** study presents a method for the quantitative identification of delamination identification in composite materials,leveraging distributed optical fiber sensors and a model updating ***,a numerical analysis is performed to establish a parameterized finite element model of the composite ***,this model subsequently generates a database of strain responses corresponding to damage of varying sizes and *** radial basis function neural network surrogate model is then constructed based on the numerical simulation results and strain responses captured from the distributed fiber optic ***,a multi-island genetic algorithm is employed for global optimization to identify the size and location of the *** efficacy of the proposed method is validated through numerical examples and experiment studies,examining the correlations between damage location,damage size,and strain *** findings confirm that the model updating technique,in conjunction with distributed fiber optic sensors,can precisely identify delamination in composite structures.

关键词： Composite structures fiber optic sensor damage identification model updating surrogate model

Landslide Research from the Perspectives of Qinling Mountains in China: A Critical Review

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Journal of Earth Science 2024年第5期35卷 1546-1567页

作者： Liye Feng Wenwen Qi Chong Xu Wentao Yang Zhiqiang Yang Zikang Xiao Zhaoning Chen Tao Li Xiaoyi Shao Huiran Gao Zhiwen Xue National Institute of natural Hazards Ministry of Emergency Management of China school of Soil and Water Conservation Beijing Forestry University Key Laboratory of Compound and Chained natural Hazards Dynamics Ministry of Emergency Management of China school of Emergency Management Science and Engineering University of Chinese Academy of Sciences

Landslides pose a frequent geological threat, endangering both productivity and the wellbeing of human life and property. In recent years, landslides have received widespread attention in various fields. This article presents a comprehensive review of landslide research in the Qinling Mountains, China. The first part introduces landslide investigation and inventory, which include manual visual interpretation and automatic landslide extraction. The second part discusses the types, characteristics, and temporal-spatial distribution of landslides in the Qinling Mountains. In the third part, the mechanisms and stability analysis of landslides are explored, along with a discussion of the applicability of various simulation methods. The fourth part focuses on significant studies related to landslide evaluation, including susceptibility, hazard, and risk assessment. The fifth part addresses landslide monitoring and early warning systems. Finally, an assessment is made of the current issues and research status concerning landslide studies in the Qinling Mountains, followed by a discussion on future research directions.

关键词： Qinling Mountains landslide review engineering geology

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Thiosulfate oxidation and autotrophy potential by marine prevalent heterotrophic bacteria of genus Marinobacter

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Acta Oceanologica Sinica 2024年第08期 89-97页

作者： Fei Xu Xiang Zeng Yadong Gong Zongze Shao school of Fisheries and Life Shanghai Ocean University Key Laboratory of Marine Biogenetic Resources Third Institute of Oceanography Ministry of Natural Resources Faculty of Marine Biology Xiamen Ocean Vocational College

The genus Marinobacter is very broadly distributed in global environments and is considered as aerobic heterotroph. In this study, six Marinobacter strains were identified with autotrophic thiosulfate oxidation *** strains, namely Marinobacter guineae M3BT, Marinobacter aromaticivorans D15-8PT, Marinobacter vulgaris F01T, Marinobacter profundi PWS21T, Marinobacter denitrificans JB02H27T, and Marinobacter sp. ST-1M（with a 99.93% similarity to the 16S rDNA sequences of Marinobacter salsuginis SD-14BT）, were screened out of 32Marinobacter strains by autotrophic thiosulfate oxidization medium. The population of cells grew in a chemolithotrophic medium, increasing from 10～5 cells/mL to 10～7 cells/mL within 5 d. This growth was accompanied by the consumption of thiosulfate 3.59 mmol/L to 9.64 mmol/L and the accumulation of sulfate up to 0.96 mmol/L, and occasionally produced sulfur containing complex particles. Among these Marinobacter strains, it was also found their capability of oxidizing thiosulfate to sulfate in a heterotrophic medium. Notably, M. vulgaris F01Tand *** ZS2-30Tshowed highly significant production of sulfate at 9.45 mmol/L and 3.10 mmol/L. Genome annotation indicated that these Marinobacter strains possess a complete Sox cluster for thiosulfate *** phylogenetic analysis of the sox B gene revealed that six Marinobacter strains formed a separate lineage within Gammaproteobacteria and close to obligate chemolithoautotroph Thiomicrorhabdus arctica. The results indicated that thiosulfate oxidizing and chemolithoautotrophic potential in Marinobacter genus, which may contribute to the widespread of Marinobacter in the global ocean.

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Small and simple:next-generation miniaturized diffraction-based spectrometer with computational reconstruction algorithms

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Light(Science & Applications) 2024年第6期13卷 1008-1011页

作者： Markus Suta Inorganic Photoactive Materials Faculty of Mathematics and Natural SciencesHeinrich Heine University DusseldorfDusseldorfGermany

An ultra-simple and miniaturized spectrometer using an arbitrarily shaped pinhole as diffraction element reconstructs a broadband spectrum from the information of diffraction of monochromatic radiation by clever computational reconstruction *** circumvents complex calibration procedures and paves the way to cost-effective on-chip spectrometers combining fast acquisition without significant loss in spectral resolution.

关键词： arbitrarily shaped element

Key processes of carbon cycle and sink enhancement paths in natural wetland ecosystems in China

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Science China Earth sciences 2024年第8期67卷 2444-2459页

作者： Jinshuai LI Tianxiang HAO Meng YANG Guirui YU Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China

Wetland ecosystems have become one of the long-term solutions for mitigating global climate change due to their strong carbon sequestration ***,the key carbon cycle processes in wetland ecosystems still lack a systematic *** the context of wetland protection and restoration,there is still a lack of consensus on the technical pathways to realize carbon sink multiplication in wetland *** this paper,the key processes of carbon cycle,such as photosynthetic carbon uptake,microbial carbon decomposition and carbon deposition and burial,are sorted out and summarized in four major wetland types,namely,swamp and peat wetlands,river and riparian wetlands,lake and lakeshore wetlands,and estuarine and coastal *** on the key processes of carbon cycle,three technological pathways for carbon sink multiplication are proposed,including,vegetation carbon sequestration and sink enhancement technology,soil carbon emission reduction technology and carbon deposition and burial *** key technologies under each pathway are further *** the carbon sink effects of the carbon sink technologies in different wetland types are qualitatively ***,wetland protection and restoration methods in corresponding regions are given in the light of the regional characteristics of wetlands in *** will provide a scientific basis for the strategy of doubling the carbon sinks of China′s wetland ecosystems.

关键词： Wetlands Carbon cycle Carbon sinks Technology pathways Conservation and restoration

Research progress in assessment and strategies for sustainable food system within planetary boundaries

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Science China Earth sciences 2024年第2期67卷 375-386页

作者： Minglei WANG Wenjiao SHI Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China

Meeting the increasing food demand in a manner that ensures both resources and environmental sustainability poses a global *** conceptual framework of planetary boundaries(PBs)has emerged as a crucial reference in the study of sustainable food system,with specific focuses on key dimensions such as land use change,freshwater use,nitrogen(N)and phosphorus(P)cycles,and greenhouse gas(GHG)*** this study,we summarized the threshold applications of PBs in sustainable food system research at both the global and national(China)*** on these thresholds,we evaluated the sustainability conditions of the food system,considering resources such as cropland,freshwater,N and P applications,as well as environmental impacts including N and P losses,and GHG *** addition,we explored the impacts of single or combined management strategies on sustainable food *** strategies included dietary changes,improvements in technologies and management,reductions in food loss and waste,and optimization in agricultural production ***,we outlined future research directions in sustainable food system,including enhancing research on the interaction mechanisms among PBs elements within food systems,conducting downscaling studies of PBs elements at national and regional levels,and ensuring the rationality of policy-making for sustainable food systems in *** study can provide a theoretical foundation and strategies guidance for sustainable food system and agricultural land use management in the future both globally and in China.

关键词： Food system Resource use Environmental impacts Sustainable strategy Planetary boundaries

Westerlies Affecting the Seasonal Variation of Water Vapor Transport over the Tibetan Plateau Induced by Tropical Cyclones in the Bay of Bengal

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Advances in Atmospheric sciences 2024年第5期41卷 881-893页

作者： Xiaoli ZHOU Wen ZHOU Dongxiao WANG Qiang XIE Lei YANG Qihua PENG Key Laboratory of Polar Atmosphere-ocean-ice System for Weather and Climate Ministry of Education&Department of Atmospheric and Oceanic Sciences&Institute of Atmospheric SciencesFudan UniversityShanghai 200438China school of Marine sciences Sun Yat-Sen UniversityZhuhai 519082China Institute of Deep-sea Science and Engineering Chinese Academic SciencesSanya 572000China State Key Laboratory of Tropical oceanography South China Sea Institute of OceanologyChinese Academic ScienceGuangzhou 510301China Scripps Institution of oceanography University of CaliforniaSan DiegoLa JollaCalifornia 92093USA

This study investigates the activity of tropical cyclones(TCs)in the Bay of Bengal(BOB)from 1979 to 2018 to discover the mechanism affecting the contribution rate to the meridional moisture budget anomaly(MMBA)over the southern boundary of the Tibetan Plateau(SBTP).May and October–December are the bimodal phases of BOB TC frequency,which decreases month by month from October to December and is relatively low in ***,the contribution rate to the MMBA is the highest in *** seasonal variation in the meridional position of the westerlies is the key factor affecting the contribution *** relatively southern(northern)position of the westerlies in November and December(May)results in a lower(higher)contribution rate to the *** mechanism is confirmed by the momentum *** water vapor enters the westerlies near the trough line,the resultant meridional acceleration is directed *** follows that the farther north the trough is,and the farther north the water vapor can be *** water vapor enters the westerlies from the area near the ridge line,for Type-T(Type-R)TCs,water vapor enters the westerlies downstream of the trough(ridge).Consequently,the direction of the resultant meridional acceleration is directed south and the resultant zonal acceleration is directed east(west),which is not conducive to the northward transport of water *** is especially the case if the trough or ridge is relatively south,as the water vapor may not cross the SBTP.

关键词： tropical cyclone Tibetan Plateau Bay of Bengal moisture budget weste