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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

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

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

Genome-wide markers for seed yield and disease resistance in perennial ryegrass

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The Crop Journal 2022年第2期10卷 508-514页

作者： Kristina Jaškune Vilma Kemešyte Andrius Aleliūnas Grazina Statkeviciute Institute of Agriculture Lithuanian Research Centre for Agriculture and Forestry(LAMMC)Instituto av.1Akademija LT-58344Lithuania

The market success of perennial ryegrass(Lolium perenne L.) cultivars depends on sufficient seed production, as they are propagated by seed. However, breeding for high quality forage production reduces seed yield, and breaking the negative correlation would help to overcome the problem. The foliar disease crown rust is another factor affecting reproductive capacity and thereby seed yield. We evaluated seed yield-related traits and resistance to crown rust in a collection of commercial cultivars and ecotypes of perennial ryegrass and identified genome-wide markers associated with the traits. The study revealed high variation between the ecotype and cultivar groups as well as between years. A genome-wide association study identified 17 DNA single-nucleotide polymorphisms(SNPs) of which eight were associated with crown rust and nine with flag-leaf length. The SNP markers were located within or near predicted genes functioning in defense against pathogens. The identified genes are strong candidates for a further in-depth functional study to continue unravel determination of leaf architecture and crown rust resistance in perennial ryegrass.

关键词： Crown rust Puccinia coronata f.sp.lolli Flag-leaf length Genome-wide association study(GWAS) Seed yield Lolium perenne L.

High-angle deflection of metagrating-integrated laser emission for high-contrast microscopy

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Light(Science & Applications) 2023年第11期12卷 2434-2442页

作者： Mindaugas Juodėnas Erik Strandberg Alexander Grabowski Johan Gustavsson HanaŠípová-Jungová Anders Larsson Mikael Käll Department of Physics Chalmers University of Technology41296 GothenburgSweden Department of Microtechnology and Nanoscience Chalmers University of Technology41296 GothenburgSweden

Flat metaoptics components are looking to replace classical optics elements and could lead to extremely compact biophotonics devices if integrated with on-chip light sources and ***,using metasurfaces to shape light into wide angular range wavefronts with high efficiency,as is typically required in high-contrast microscopy applications,remains a *** we demonstrate curved GaAs metagratings integrated on vertical-cavity surface-emitting lasers(VCSELs)that enable on-chip illumination in total internal reflection and dark field *** on an unconventional design that circumvents the aspect ratio dependent etching problems in monolithic integration,we demonstrate off-axis emission centred at 60°in air and 63°in glass with>90%and>70%relative deflection efficiency,*** resulting laser beam is collimated out-of-plane but maintains Gaussian divergence in-plane,resulting in a long and narrow illumination *** show that metagrating-integrated VCSELs of different kinds can be combined to enable rapid switching between dark-field and total internal reflection *** approach provides a versatile illumination solution for high-contrast imaging that is compatible with conventional microscopy setups and can be integrated with biophotonics devices,such as portable microscopy,NIR-II range bioimaging,and lab-on-a-chip devices.

关键词： illumination deflection optics

Growth and chemical composition of silver birch:Comparative study between Lithuania and Romania

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Journal of Forestry Research 2021年第5期32卷 2111-2120页

作者： Valda Araminienė Lucian Dinca Iveta Varnagirytė-Kabašinskiene Raluca Enescu Vlad Crisan Vidas Stakėnas Institute of Forestry Lithuanian Research Centre for Agriculture and ForestryLiepųstr.1 Girionys53101 Kaunas districtLithuania The National Institute for Research and Development in Forestry“Marin Drăcea” Closca str.13BrasovRomania

The effects of different climatic conditions on growth and chemical composition of Betula pendula in geographically different European regions,Lithuania and Romania,were *** species in the entire area have a wide natural distribution,but *** is commercially more important in Lithuania than in *** we evaluated tree ring width,wood density and foliar chemical composition of mature birch trees in two European *** at the Lithuanian sites had greater radial growth and wood density with no clear changes in foliar chemistry than those at the Romanian *** wood density was 600-700 kg m^(-3) at Lithuanian and 350-450 kg m^(-3) at Romanian *** width of wood ring,earlywood and latewood for Lithuanian birch trees were several times higher than the means for Romanian birch *** hypothesized that the main differences in birch radial growth and wood density were due to the different climatic conditions in the studied ***,K and Mg concentrations were significantly higher and Fe and Mn were lower in the birch foliage at the Lithuanian sites compared those at the Romanian *** assessment of growth showed that silver birch cultivation is more appropriate for colder climate regions and that birch growth may change in the context of a warming climate.

关键词： Betula pendula Ring width Ood density Foliage chemistry

Micronucleus analysis in patients with colorectal adenocarcinoma and colorectal polyps

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World Journal of Gastroenterology 2008年第44期14卷 6835-6839页

作者： Ali Karaman Dogan nas■r Binici Mehmet E■ref Kabalar Züleyha ■al■ku■u Department of Medical Genetics Erzurum Training and Research HospitalErzurum 25240Turkey Department of Internal Medicine Erzurum Training and Research HospitalErzurum 25240Turkey Department of Pathology Erzurum Training and Research HospitalErzurum 25240Turkey Department of Medical Oncology Erzurum Training and Research HospitalErzurum 25240Turkey

AIM:To determine,by counting micronucleus (MN) frequencies,whether chromosomal or DNA damage have an effect on the pathogenesis of early colorectal adenocarcinoma (CRC). METHODS:We analyzed MN frequencies in 21 patients with CRC,24 patients with colon polyps [10 neoplastic polyps (NP) and 14 non-neoplastic polyps (NNP)] and 20 normal controls. RESULTS:MN frequency was significantly increased in CRC patients and in NP patients compared with controls (3.72 ± 1.34,3.58 ± 1.21 vs 1.97 ± 0.81,P 0.05). Similarly,there was no difference in the MN frequency between NNP patients (2.06 ± 0.85) and controls (P > 0.05). CONCLUSION:Our results suggest increased chromosome/DNA instabilities may be associated with the pathogenesis of early CRC.

关键词： Colorectal adenocarcinoma Colon polyp Micronucleus Genetic instability