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Influence of phytoplankton,bacteria and viruses on nutrient supply in tropical waters

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Journal of Environmental Sciences 2025年第5期151卷 174-186页

作者： Zhi Yang Sim Kwan Chien goh Nur Hanisah binte Sukarji Feijian Mao Yiliang He Karina Yew-Hoong Gin National University of Singapore Environmental Research Institute National University of Singapore1 Create Way#15-02Singapore 138602Singapore Institute of Tibetan Plateau Research Chinese Academy of Sciences(CAS)Beijing 100101China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of Civil and Environmental Engineering National University of SingaporeBlk E1A-07-031 Engineering Drive 2Singapore 117576Singapore

Diel investigations of water environments are one means to holistically understand the dynamics and functional roles of phytoplankton,bacteria and viruses in these *** have the potential to substantially impact carbon(C),nitrogen(N)and phosphorus(P)biogeochemistry through their respective *** study characterizes the phytoplankton,bacteria and virus communities and the elemental composition of various C,N and P nutrients flow over three diel cycles in tropical urban *** results show that ratios of C:N:P fluctuated strongly from the lack of dissolved organic phosphorus(DOP)and PO_(4).Specifically,green algae peaked during day time and exudate dissolved organic matter(DOM)that strongly modulate dissolved organic carbon(DOC):DOP ratio to diel DOP *** linear regression and Stella modelling emphasize the roles of viruses together with Synechococcus as important nutrient recyclers of NH_(4)and PO_(4)in nutrients-limited *** normalised surface PO_(4)and combined surface and bottom NH_(4)concentration selected both viruses and Synechococcus as important *** model of N and P biogeochemical cycles can achieve 69%and 57%similar to observed concentration of NH_(4)and PO_(4),respectively.A short latent period of 9 hr was calculated,in addition to the calibrated high infectivity of viruses to *** together,the rapid turn-over between Synechococcus and viruses has biogeochemical significance,where the rapid recycling of essential nutrients allows for shortcuts in the N and P cycle,supporting a wide range of microbes.

关键词： Diel Phytoplankton Bacteria Virus Nutrients Element ratios

Modulating neuronal plasticity with choline

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Neural Regeneration Research 2019年第10期14卷 1697-1698页

作者： Eunice W. M. Chin eyleen l.K. goh Neuroscience Academic Clinical Programme Duke-NUS Medical SchoolSingaporeSingapore Department of Research National Neuroscience InstituteSingaporeSingapore

The American psychologist William James once wrote that nervous tissue seems to be endowed with a “very extraordinary” degree of plasticity. To be plastic means to be capable of being molded, receiving shape, or being made to assume a desired form. This can be achieved consequential to changes in the internal and/or external environment. Being plastic, neurons are highly able to amend their structural and functional output, through alteration of their morphology, activation of intracellular signaling cascades, regulation of synaptic density and neurotransmitter release, or a combination of these events.

关键词： The American psychologist tissue seems to be endowed combination of these events

Studying neurological disorders using induced pluripotent stem cells and optogenetics

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Neural Regeneration Research 2015年第11期10卷 1720-1722页

作者： Eunice W.M.Chin eyleen l.K.goh Program in Neuroscience and Behavioral Disorders Duke-NUS Graduate Medical School Singapore NUS Graduate School for Integrative Singapore Sciences and Engineering National University of Singapore Department of Physiology Yong Loo Lin School of Medicine National University of Singapore KK Research Center KK Women’s and Children’s HospitalSingapore

Neurological disorders are amongst the most widely studied human ***,they are also one of the most poorly *** most of these disorders are polygenic,genotype still plays an important role in their *** example,in schizophrenia and autism spectrum disorders,there is a 40-60%concordance rate in monozygotic twins,with 60-90%heritability（Burmeister et al.,2008）.However,the mechanisms by which multiple genes and their genomic variations influence the phenotypes of the disorders remain to be understood. The complexities of the disorders are tur- ther compounded by the individual rarity of the genomic variations and their variable penetrance （Cook and Scherer, 2008）. Thus, conventional disease modeling, such as gene knockout in cells or in animals, to attain the desired disease genotype may not be the most suitable platform for tackling most neurological disorders.

关键词： PSCs cell stem Studying neurological disorders using induced pluripotent stem cells and optogenetics

Knotting ligands to control metal coordination geometry

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Science China Chemistry 2025年第2期68卷 403-404页

作者： Fabien B.l.Cougnon Department of Chemistry and Nanoscience Centre University of JyväskyläJyväskyläFinland

Zinc is a metal of particular importance for life[1].It is the most abundant transition metal in biological systems after iron and contributes both structural and catalytic roles to many cellular *** properties of Zn^(Ⅱ),unlike those of any other first-row transition metal ions,explain its biological *** to its filled d-shell orbitals,Zn^(Ⅱ) is redox-stable,has a ligand-field energy stabilization of zero and,consequently,no typical coordination number and *** metalloproteins exploit these features to carry a broad range of chemical reactions in mild *** metalloenzymes,unsaturated ZnII centres often act as redox-stable lewis *** protein backbone provides a highly preorganized environment around the metal centre and accompanies the changes in coordination geometry occurring as substrate transformation proceeds,thereby modulating the metal reactivity.

关键词： coordination geometry centre

Morphology and phylogeny of two species of Bathypathes from the tropical western Pacific,with description of a new species

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Journal of Oceanology and limnology 2025年第1期43卷 248-260页

作者： Ting lÜ Zifeng ZHAN Kuidong XU laboratory of Marine Organism Taxonomy and Phylogeny Qingdao Key Laboratory of Marine Biodiversity and ConservationInstitute of OceanologyChinese Academy of SciencesQingdao 266071China laboratory for Marine Biology and Biotechnology Laoshan LaboratoryQingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

The black coral genus Bathypathes Brook,1889 represents a relatively diverse and ecologically important assemblage comprising the deep-sea hard substrate *** phylogenetic investigations have revealed the polyphyletic nature of Bathypathes,urging further morphological analysis to understand its *** combing morphological and molecular data,we describe Bathypathes multifurcata *** report *** Molodtsova,Opresko&Wagner,2022based on the specimens collected from the tropical western *** phylogenetic topology reconstructed using nuclear ITS1-5.8S-ITS2 and three mitochondrial fragments suggests the separation of Bathypathes into four *** analysis of morphological characters,particularly the colony branch and pinnule patterns also roughly classify Bathypathes into four morphological groups A–*** A is characterized by the unbranched colony and the subopposite arrangement of *** contrast to Group A,Groups B–D have the alternately arranged *** these,Group C exhibits a distinctly long unpinnulated stem compared to Groups B and *** B has unbranched colony,relatively short unpinnulated stem,and spines on pinnules have blunt *** Group D,large colonies(higher than 40 cm)have one or a few branches,small colonies(less than 40 cm)are unbranched,and spines on pinnules have acute *** data particularly those species without sequences are necessary to verify the classification of these groups.

关键词： Antipatharia black coral taxonomy phylogeny seamount western Pacific

Magnetosymbiosis discovery:new perspectives in magnetotaxis research

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Journal of Oceanology and limnology 2025年第1期43卷 177-186页

作者： Caroline l.MONTEIl Christopher T.lEFEVRE Aix-Marseille Université CEACNRSInstitute of Biosciences and Biotechnologies of Aix-MarseilleSaint-Paul-lez-Durance 13115France

Magnetotactic bacteria have been the only known magnetoreceptive microorganisms for *** if the existence of magnetotactic protists was suggested in 1986,this is only 30 years later that magnetotaxis was extended to the domain of Eukaryota,thanks to the characterization of magnetotactic symbiotic assemblies composed of a flagellated protist and bacteria biomineralizing magnetic *** mutualistic ectosymbiosis relies on a collective magnetotaxis coupled to a hydrogen-based *** new form of cooperation challenges our view of magnetic biomineralization in prokaryotes and magnetoreception in *** this review,we present how magnetosymbiosis was discovered and how cooperation ***,we discuss the future research and the new perspectives such discovery brought to the field of magnetotaxis.

关键词： magnetotaxis biomineralization symbiosis magnetotactic

Beginning from the end:the presynaptic terminal as a pathomechanism hub in frontotemporal dementia and amyotrophic lateral sclerosis

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Neural Regeneration Research 2025年第11期20卷 3217-3218页

作者： laura Huggon Emma l.Clayton UK Dementia Research Institute at King’s College london LondonUK Department of Basic and Clinical Neuroscience Institute of Psychiatry Psychology&NeuroscienceKing’s College LondonLondonUK

Frontotemporal dementia and amyotrophic lateral sclerosis:Frontotemporal dementia(F T D)and amyo t rophic lateral sclerosis(AlS)are neurodegenerative diseases with significant overlapping *** these neurodegenerative diseases affect different neuronal populations(with FTD affecting neurons of the frontal and temporal lobes,and AlS affecting upper and lower motor neurons),these two diseases are complexly *** and AlS exist on a disease spectrum,with shared genetic causes,clinical presentations,and pathologies.

关键词： diseases amyotrophic sclerosis

Seismites of the late Triassic lockatong Formation,Pennsylvania,USA:implications for Newark Basin border fault movement

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Journal of Palaeogeography 2025年第1期14卷 1-14页

作者： Edward l.Simpson Michael C.Wizevich David l.Fillmore Department of Physical Sciences Kutztown University of Pennsylvania Department of Earth and Space Sciences Central Connecticut State University

Numerous soft-sediment deformation structures(SSDS) within thin-bedded, heterolithic lacustrine shoreline deposits of the Upper Triassic Tumble Falls Member, lockatong Formation of eastern Pennsylvania, demonstrate liquefaction, fluidization and shearing features processes affecting sediment. This study employs thin-section analysis of SSDS to interpret them as probable seismites from the Triassic-Jurassic Newark Basin. Sedimentary structures include right-lateral offset of desiccation cracks and ichnofossils, thrust,reverse, and normal faults with mm-scale offsets, horsts and grabens, lateral spreads, and single and complex multiple networks of dikes and sills and associated sedimentary volcanoes, thin mudflows on a paleosurface linked to sediment dikes, load and flame structures, ball and pillow structures, recumbent folds, and incipient breccias. Dike fill consists of mudstone, angular sedimentary clasts, sandstone margins with mudstone cores,and plastically deformed sediment fill. The SSDS indicate that late Triassic lacustrine shoreline sediments were subjected to forces, probably compressive with a minimal shear component reflected in the offset of the dikes and ichnofossils, that induced liquefaction followed by fluidization and vertical movement of *** forces that altered sediment vertical stability, leading to deformation of the sediment included gravitationally unstable density gradients, vertical shear stress, and gravitational body forces. SSDS can be induced by seismic and aseismic processes. However, this unique combination of forces and resulting sedimentary structures indicate an origin by earthquake activity, likely produced by the nearby, active Newark Basin border fault system. The lockatong Formation SSDS seismites improve our understanding via thin section analysis of the rheology and preservation potential of SSDS in lacustrine shoreline deposits, critical for the geologic history of Newark Basin, as well as the refinement for paleos

关键词： Seismites Triassic lockatong Formation lacustrine Soft-sediment deformation structures

Force and impulse multi-sensor based on flexible gate dielectric field effect transistor

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 214-220页

作者： Chao Tan Junling lü Chunchi Zhang Dong liang lei Yang Zegao Wang College of Materials Science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang 050081China

Nowadays,force sensors play an important role in industrial production,electronic information,medical health,and many other ***-dimensional material-based filed effect transistor(2D-FET)sensors are competitive with nano-level size,lower power consumption,and accurate ***,few of them has the capability of impulse detection which is a path function,expressing the cumulative effect of the force on the particle over a period of *** we fabricated the flexible polymethyl methacrylate(PMMA)gate dielectric MoS_(2)-FET for force and impulse sensor *** systematically investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signals(I_(ds))to the detected impulse(I).The applied force was detected and recorded by I_(ds)with a low power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is able to detect and locate the normal force applied on ***,there was almost no performance loss for the device as left in the air for two months.

关键词： flexible gate dielectric transistor force sensor impulse sensor force sensor array