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Astrocytes dynamically regulate the blood-brain barrier in the healthy brain

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Neural Regeneration Research 2024年第4期19卷 709-710页

作者： AgnėPociūtė Augustas Pivoriūnas Alexei Verkhratsky Department of Stem Cell Biology State Research Institute Centre for Innovative MedicineVilniusLithuania Faculty of Biology Medicine and HealthThe University of ManchesterManchesterUK Achucarro Centre for Neuroscience IKERBASQUEBasque Foundation for ScienceBilbaoSpain Department of Forensic Analytical Toxicology School of Forensic MedicineChina Medical UniversityShenyangLiaoning ProvinceChina

The blood-brain barrier(BBB)(discovered and defined by Max Lewandowsky and Lina Stern,and not,as it is universally,and yet erroneously believed,by Paul Ehrlich(Verkhratsky and Pivoriunas,2023))that separates the nervous system from the circulation is evolutionarily conserved from arthropods to *** primeval BBB of the invertebrates and some early vertebrates was made solely by glial cells and secured(in invertebrates)by septate junctions.

关键词： Ehrlich barrier blood

Pinus sylvestris and Picea abies canopy effects on deposition of air pollutants

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Journal of Forestry Research 2024年第4期35卷 34-46页

作者： ValentinasČerniauskas Iveta Varnagirytė‑Kabašinsk ienė Valda Araminienė Vidas Stakėnas Lithuanian Research Centre for Agriculture and Forestry Instituto Av.1Akademija58344 Kėdainiai distr.Lithuania

Tree canopies influence atmospheric pollutant depositions depending on type,ecosystem characteristics,and local climatic *** study investigated the impact of Pinus sylvestris *** Picea abies(L.)***.,and a mixture of both,on the chemical composition of *** permanent plots within the ICP forest level Ⅱ monitoring network in Lithuania were selected to illustrate typical hemiboreal coniferous *** study analysed(1)the concentrations of NO_(2),NH_(3) and SO_(2) in the ambi-ent air;(2)the concentrations of SO_(4)^(2−),NO_(3)^(−),NH_(4)^(+),Na^(+),K^(+),Ca^(2+) and Cl^(-) in throughfall beneath canopies and in precipitation collected in an adjacent field,and(3)S and total N,Na^(+),K^(+),Ca^(2+)and Cl−depositions in throughfall and precipitation over *** show a signifi-cant decrease in SO_(2) emissions in the ambient air;NO_(2) and NH_(3) emissions also *** canopies reduced the acidity of throughfall,although they led to notably higher concentrations of SO_(4)^(2−),NO_(3)^(−),Na^(+),and particularly K^(+).During the study,low variability in NO_(3)^(-)deposition and a decrease in NH_(4)^(+)deposition *** loads increased by 20-30%when precipitation passed through the *** cumulative deposition of S,Cl,Na,K,Ca,and N was greater under *** than under ***-ever,K deposition in throughfall was considerably lower under *** compared to the *** or mixed *** S depositions declined across all three coniferous ***,there was no specific effect of tree species on throughfall chemistry.

关键词： Precipitation Throughfall Deposition of chemicals Pollution Lithuania

Pinus sylvestris and Picea abies canopy effects on deposition of air pollutants

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Journal of Forestry Research 2024年第4期 38-50页

作者： Valentinas ?erniauskas Iveta Varnagiryt?-Kaba?inskien? Valda Araminien? Vidas Stak?nas Lithuanian Research Centre for Agriculture and Forestry Instituto Av.1

Tree canopies influence atmospheric pollutant depositions depending on type,ecosystem characteristics,and local climatic *** study investigated the impact of Pinus sylvestris *** Picea abies （L.） ***.,and a mixture of both,on the chemical composition of *** permanent plots within the ICP forest level II monitoring network in Lithuania were selected to illustrate typical hemiboreal coniferous *** study analysed（1） the concentrations of NO2,NH3and SO2in the ambient air;（2） the concentrations of SO42-,NO3-,NH4+,Na+,K+,Ca2+and Cl–in throughfall beneath canopies and in precipitation collected in an adjacent field,and （3） S and total N,Na+,K+,Ca2+and Cl-depositions in throughfall and precipitation over 2006–*** show a significant decrease in SO2emissions in the ambient air;NO2and NH3emissions also *** canopies reduced the acidity of throughfall,although they led to notably higher concentrations of SO42-,NO3-,Na+,and particularly K+.During the study,low variability in NO3–deposition and a decrease in NH4+deposition *** loads increased by 20–30% when precipitation passed through the *** cumulative deposition of S,Cl,Na,K,Ca,and N was greater under *** than under ***,K deposition in throughfall was considerably lower under *** compared to the *** or mixed *** S depositions declined across all three coniferous ***,there was no specific effect of tree species on throughfall chemistry.

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区块链和物联网的融合：集成、安全性和用例（英文）

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Frontiers of Information Technology & Electronic Engineering 2024年第10期 1295-1322页

作者： Robertas DAMA?EVI?IUS Sanjay MISRA Rytis MASKELIūnas Anand NAYYAR 维陶塔斯·马格努斯大学应用信息学系能源技术研究所应用数据科学系考纳斯理工大学多媒体工程系维新大学信息技术学院研究生院

物联网（Io T）设备变得越来越普遍，其采用率呈指数级增长。然而，它们很容易受到安全漏洞的影响，传统的安全机制不足以保护它们。物联网设备生成的大量数据很容易被操纵或窃取，从而带来严重的隐私问题。本文旨在全面概述区块链和物... 详细信息

物联网（Io T）设备变得越来越普遍，其采用率呈指数级增长。然而，它们很容易受到安全漏洞的影响，传统的安全机制不足以保护它们。物联网设备生成的大量数据很容易被操纵或窃取，从而带来严重的隐私问题。本文旨在全面概述区块链和物联网技术的集成及其增强物联网系统安全性和隐私性的潜力。研究了物联网中的各种安全问题和漏洞，探讨如何使用基于区块链的方案来解决这些问题。提供了对物联网中各种安全问题和漏洞的见解，并探讨如何使用区块链来增强安全性和隐私性。还讨论了基于区块链的物联网（BIo T）系统在医疗保健、运输和供应等各个领域的潜在应用。揭示了区块链和物联网的集成可增强物联网系统的安全性、隐私性和可信度。B-Io T的多层架构包括感知层、网络层、数据处理层和应用层，为区块链和物联网技术的集成提供了全面的框架。该研究确定了B-Io T的各种安全解决方案，包括智能合约、去中心化控制、不可变数据存储、身份和访问管理（IAM）以及共识机制。该研究还讨论了B-Io T领域的挑战和未来研究方向。

关键词：区块链物联网(Io T) 基于区块链的物联网(B-Io T) 安全性可扩展性隐私

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去月亮上建家园

小哥白尼（趣味科学） 2024年第6期 10-13页

作者：千盏 Spacex(图) esa(图) 不详

神话故事里,月亮是嫦娥和玉兔的家;科幻故事里,月亮是宇宙探险家的乐园。从古至今,人们都梦想能在那轮明月上居住生活,那在月球建个基地怎么样?

关键词：科幻故事神话故事月亮探险家

Carbon and Nickel Oxide/Carbon Composites as Electrodes for Supercapacitors

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Journal of Materials Science & Technology 2012年第10期28卷 931-936页

作者： Liutauras Marcinauskas Zydrūnas Kavaliauskas Vitas Valinius Plasma Processing Laboratory Lithuanian Energy Institute Department of Physics Kaunas University of Technology

The carbon and nickel oxide/carbon composite electrodes were prepared by plasma jet and magnetron sput-tering techniques. The investigations were performed to evaluate the influence of the Ar/C2H2 ratio on the specific capacitance values of carbon and NiO/carbon electrodes. The obtained electrodes were investigated by scanning electron microscopy, Raman scattering spectroscopy （RS）, and X-ray diffraction techniques. The surface of the carbon electrodes became less porous and more homogenous with increasing Ar/C2H2. The RS results indicated that the fraction of the sp2 carbon sites increased with increasing Ar/C2H2 ratio. The increase of the Ar/C2H2 ratio increased the capacitance values from 0.73 up to 3.8 F/g. Meanwhile, after the deposition of the nickel oxide on the carbon, the capacitance increased ten and more times and varied in the range of 7.6-86.1 F/g.

关键词： Carbon Plasma Nickel oxide Capacitance Supercapacitors

Ground vegetation,forest floor and mineral topsoil in a clear-cutting and reforested Scots pine stands of different ages:a case study

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Journal of Forestry Research 2022年第4期33卷 1247-1257页

作者： DovilėGustienė Iveta Varnagirytė-Kabašinskienė Vidas Stakėnas Lithuanian Research Centre for Agriculture and Forestry Liepųstr.1Girionys53101 Kaunas DistrictLithuania Kaunas Forestry and Environmental Engineering University of Applied Sciences Liepųstr.1Girionys53101 Kaunas DistrictLithuania

Scots pine(Pinus sylvestris L.)is a dominant tree species on nutrient-poor sandy soils in the Baltic region’s hemiboreal forests.A final clear-cut in commercial stands is a common ***,the maintenance of relatively stable vegetation indices and ecological processes throughout the rotation promote new scientific and social ***,clear-cuttings disturb forest functions for a certain period,i.e.,phytocenoses with forest-based species composition,biodiversity,and vegetation *** organic carbon(SOC)and nutrients can also be *** key indices,ground vegetation,SOC and main nutrients in the forest floor and in 40-cm topsoil layer were analysed in the clear-cuttings(not reforested)and in reforested 10-,30-,and 101-year-old Scots pine stands in *** results show an increase in species richness at the beginning of stand formation up to 30 years after clear-cutting;species typical of a mature forest occurred relatively quickly *** mean mass of forest floor vegetation was negatively related to the richness of ground vegetation *** floor p H consequently decreased with stand *** SOC levels were in the mature *** the mineral topsoil layers,total SOC and total nitrogen were in the upper 10-cm layer in the 30-year-old stand.A post-harvest peak in mineral N concentration was observed and other nutrients,especially mobile PO,KO,Caand Mg,increased the clear-cuttings and in the 10-year-old stand compared to the mature stand.

关键词： Pinus sylvestris Species cover Richness Soil organic carbon Soil nutrients Mature stand

Astrocyte-derived extracellular vesicles mediate intercellular communications of the neurogliovascular unit

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Neural Regeneration Research 2021年第7期16卷 1421-1422页

作者： Augustas Pivoriūnas Alexei Verkhratsky Department of Stem Cell Biology State Research Institute Centre for Innovative MedicineVilnius Lithuania Faculty of Biology Medicine and HealthThe University of ManchesterManchesterUK Achucarro Centre for Neuroscience IKERBASQUEBasque Foundation for ScienceBilbaoSpain

The cortical grey matter of mammals has a specific cyto-architecture defined by the process of "tiling" in which protoplasmic astrocytes parcellate the nervous tissue into spatially segregated territorial domains.

关键词： spatially media domains.

Neuroprotective properties of extracellular vesicles derived from mesenchymal stem cells

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Neural Regeneration Research 2016年第6期11卷 904-905页

作者： akvile jarmalaviciūte augustas pivoriūnas Department of Stem Cell Biology State Research Institute Centre forInnovative Medicine Vilnius Lithuania

Extracellular vesicles（EVs）provide a novel mechanism of intercellular communication via the transfer of proteins,lipids,and miR nas between *** is now widely accepted that cargo content of EVs depends on cell type and its physiological ***,EVs derived from healthy cells may have a comparable therapeutic potential as cells themselves.

关键词： vesicles cargo intercellular physiological lipids comparable themselves notion neuronal displayed