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Microbial diversity and oil biodegradation potential of northern Barents Sea sediments

Journal of Environmental Sciences 2024年第12期146卷 283-297页

作者： Song-Can Chen Florin Musat Hans-Hermann Richnow Martin krüger Department of Isotope Biogeochemistry Helmholtz Centre for Environmental Research–UFZLeipzigGermany Division of Microbial Ecology Department of Microbiology and Ecosystem ScienceUniversity of ViennaViennaAustria Department of Biology Section for MicrobiologyAarhus UniversityAarhusDenmark Department of Molecular Biology and Biotechnology Faculty of Biology and GeologyBabeș-Bolyai UniversityCluj-NapocaRomania Federal Institute for Geosciences and Natural Resources(BGR) Stilleweg 230655HannoverGermany

The Arctic,an essential ecosystem on Earth,is subject to pronounced anthropogenic pressures,most notable being the climate change and risks of crude oil *** crucial elements of Arctic environments,benthic microbiomes are involved in climate-relevant biogeochemical cycles and hold the potential to remediate upcoming ***,the Arctic benthic microbiomes are among the least explored biomes on the *** we combined geochemical analyses,incubation experiments,and microbial community profiling to detail the biogeography and biodegradation potential of Arctic sedimentary microbiomes in the northern Barents *** results revealed a predominance of bacterial and archaea phyla typically found in the deep marine biosphere,such as Chloroflexi,Atribacteria,and *** topmost benthic communities were spatially structured by sedimentary organic carbon,lacking a clear distinction among geographic *** increasing sediment depth,the community structure exhibited stratigraphic variability that could be correlated to redox geochemistry of *** benthic microbiomes harbored multiple taxa capable of oxidizing hydrocarbons using aerobic and anaerobic *** of surface sediments with crude oil led to proliferation of several genera from the so-called rare *** include Alkalimarinus and Halioglobus,previously unrecognized as hydrocarbon-degrading genera,both harboring the full genetic potential for aerobic alkane *** findings increase our understanding of the taxonomic inventory and functional potential of unstudied benthic microbiomes in the Arctic.

关键词： Arctic Deep-sea sediments Benthic microbiomes Biodiversity Oil biodegradation

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Zinc in plants:Integrating homeostasis and biofortification

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Molecular Plant 2022年第1期15卷 65-85页

作者： Camilla Stanton Dale Sanders Ute krämer Dorina Podar John Innes Centre Colney LaneNorwichNR47UHUK Molecular Genetics and Physiology of Plants Ruhr University Bochum44801 BochumGermany Department of Molecular Biology and Biotechnology and Centre for Systems Biology Biodiversity and BioresourcesBabes-Bolyai University400084 Cluj-NapocaRomania

Zinc plays many essential roles in *** a strong Lewis acid that lacks redox activity under environ-mental and cellular conditions,the Zn2+cation is central in determining protein structure and catalytic function of nearly 10%of most eukaryotic *** specific functions of zinc have been elucidated at a molecular level in a number of plant proteins,wider issues abound with respect to the acquisition and distribution of zinc by *** important challenge is to understand how plants balance between Zn supply in soil and their own nutritional requirement for zinc,particularly where edaphic factors lead to a lack of bioavailable zinc or,conversely,an excess of zinc that bears a major risk of *** are the ultimate source of zinc in the human diet,and human Zn deficiency accounts for over 400000 deaths ***,we review the current understanding of zinc homeostasis in plants from the molecular and physiological *** provide an overview of approaches pursued so far in Zn biofortification of ***,we outline a"push-pull"model of zinc nutrition in plants as a simplifying *** summary,this review discusses avenues that can potentially deliver wider bene-fits for both plant and human Zn nutrition.

关键词： zinc biofortification Zn homeostasis cereals Arabidopsis barley wheat rice

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A decoy receptor derived from alternative splicing fine-tunes cytokinin signaling in Arabidopsis

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Molecular Plant 2024年第12期17卷 1850-1865页

作者： Michaela králová Ivona Kubalová Jakub Hajný Karolina Kubiasová Karolína Vagaská Zengxiang Ge Michelle Gallei Hana Semerádová Anna Kuchařová Martin Hönig Aline Monzer Martin kova.ik JiříFriml Ondřej Novák Eva Benková Yoshihisa Ikeda David Zalabák Laboratory of Growth Regulators Faculty of Science of PalackýUniversity and Institute of Experimental Botany AS CRŠlechtitelů2778371 OlomoucCzech Republic Department of Molecular Biology Centre of the Region Hanáfor Biotechnological and Agricultural ResearchFaculty of SciencePalackýUniversityŠlechtitelů2778371 OlomoucCzech Republic Institute of Science and Technology Austria(ISTA) 3400 KlosterneuburgAustria Department of Chemical Biology Faculty of SciencePalackýUniversityŠlechtitelů2778371 OlomoucCzech Republic Institute of Experimental Botany of the Czech Academy of Sciences Centre of Plant Structural and Functional GenomicsŠlechtitelů3177900 OlomoucCzech Republic These authors contributed equally to this article.

Hormone perception and signaling pathways have a fundamental regulatory function in the physiological processes of ***,a class of plant hormones,regulate cell division and meristem *** cytokinin signaling pathway is well established in the model plant *** negative feedback mechanisms,tightly controlling cytokinin signaling output,have been described *** this study,we identified a new feedback mechanism executed through alternative splicing of the cytokinin receptor AHK4/CRE1.A novel splicing variant named CRE1int7 results from seventh intron retention,introducing a premature termination codon in the *** showed that CRE1int7 is translated in planta into a truncated receptor lacking the C-terminal receiver domain essential for signal ***1int7 can bind cytokinin but cannot activate the downstream *** present a novel negative feedback mechanism of the cytokinin signaling pathway,facilitated by a decoy receptor that can inactivate canonical cytokinin receptors via dimerization and compete with them for ligand *** proper plant growth and development requires precise control of the cytokinin signaling pathway at several ***1int7 represents a so-far unknown mechanism for fine-tuning the cytokinin signaling pathway in Arabidopsis.

关键词： splicing Arabidopsis decoy

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Geological and Morphological Features of the Karap?nar Sinkholes(Konya,Central Anatolia,Türkiye)

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Journal of Earth Science 2024年第5期35卷 1654-1668页

作者： Yasar Eren Seyda Parlar Berkant Coskuner Sükrü Arslan Department of Geological Engineering Faculty of Engineering and Natural SciencesKonya Technical UniversityKonya 42250Turkiye Prime Ministry Disaster and Emergency Management Authority Konya Provincial Directorate of Disaster and EmergencySelcuklu/Konya42100Turkiye

Karapınar region(Konya,Türkiye)is one of the important regions of the world in terms of sinkhole *** research aimed to map the sinkholes in detail,to determine their spatial distribution and geometrical *** this purpose,the long axes,short axes,depths and the proximity to settlements of the sinkholes were measured and their circumferences and areas were *** the studies,the relationship of the sinkholes with lithology,their cross sections,shapes and the related structures were determined and the sinkholes were divided into five main groups as following:Basement rock sinkholes,Obruk Plateau sinkholes,Seyithacı sinkholes,Siyeklik sinkholes and Basin *** d/l ratios of each sinkhole group were separately determined and ***,most of the d/l ratios are smaller than ***,the long axes are higher than the depth and it indicates that the shallow and wide sinkholes are common in the *** has been determined that the fracture systems in the region,as well as the lithology and groundwater factors,are quite effective in the formation and distribution of the sinkholes in the Karapınar *** the distance of the sinkholes to the settlements,Seyithac?sinkholes are the most risky group in the region because they are deep and close to the settlements.

关键词： Karapinar Sinkhole Turkiye Central Anatolia Obruk Plateau hydrogeology

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Protective effect of Sida cordata leaf extract against CCl_4 induced acute liver toxicity in rats

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Asian Pacific Journal of Tropical Medicine 2013年第4期6卷 280-284页

作者： Sunil Mistry kr Dutt J Jena Gayatri College of Pharmacy Gayatri ViharSambalpurOrissa-768200India CMR College of Pharmacy KandlakoyaMedchan RoadHyderabad-501401India Department of Pharmacology VSS Medical CollegeSambalpur University

Objective:To investigate the hepatoprotective potential of Sida cordata（Malvaceae）（***） in experimental rats to validate its traditional ***:Wister albino rats were divided into 6 groups:Croup 1 served as control;CroupⅡserved as hepatotoxic（CCl4 treated） group; CroupⅢ,Ⅳand V served as（100,200 and 400 mg/kg b.w.） *** leaf extract（SCLE） treated groups;CroupⅥserved as positive control（Silymarin） treated *** marker enzymes serum glutamate oxyloacetic transaminase,serum glutamic pyruvic transaminase,pancreatic enzymatic antioxidants superoxide dismutase（SOD）,lipid peroxidation,catalase（CAT）,reduced glutathione（CSH） were measured and compared along with histopathological ***: Obtained results show that the treatment with SCI.E significantly（P<0.05-<0.001） and dosedependently reduced CCl4 induced elevated serum level of hepatic ***, SCLE significantly（up to P<0.001） reduced the lipid peroxidation in the liver tissue and restored activities of defence antioxidant enzymes CSH,SOD and CAT towards normal levels,which was confirmed by the histopathological ***:The results of this study strongly indicate the protective effect of SCLE against CCl4 induced acute liver toxicity in rats and thereby scientifically support its traditional use.

关键词： Sida cordata Histopathology Hepatoprotective CCl_4

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A detailed study on trust management techniques for security and privacy in IoT:challenges,trends,and research directions

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High-Confidence Computing 2023年第2期3卷 71-82页

作者： Himani Tyagi Rajendra Kumar Santosh kr Pandey Department of Computer Science Jamia Millia IslamiaNew Delhi 110025India Department of EC&IT MeityNew Delhi 110003India

The Internet of Things is a modern technology that is directed at easing human life by automating most of the things used in daily *** never-ending dependency on the network for communication is attracting adversaries to exploit the vulnerabilities of ***,this technology is facing some serious issues and challenges concerning security and *** issues and challenges are the real motivation behind considering this ***,this survey includes a discussion about security and privacy challenges as well as available solutions for IoT based wireless sensor *** systematic literature review(SLR)focuses particularly on a popular and applicable security approach known as Trust Management System(TMS).Firstly,all aspects of trust management,including trust indicators,trust properties,trust evaluation,trust building,trust models and the importance of those models for security and privacy,trust prediction methodologies,and ultimately trust-based attacks,are covered in this ***,trust management schemes are classified into four groups based on the methodology used for trust-based security solutions in the IoT:cryptography-based,computational and probabilistic-based,information theory-based,and ***,an understanding of the problems and difficulties with current methodologies is given,along with suggestions for further ***,the SLR is concluded by formulating the desirable characteristics of a trust management system in the IoT and proposing a trust model suitable for IoT networks.

关键词： Trust Trust management approaches IoT Security Privacy Reliability Attacks Trust attributes Systematic literature review Cybersecurity

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Numerical Integration over Pyramids

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Advances in Applied Mathematics and Mechanics 2013年第3期5卷 309-320页

作者： Chuanmiao Chen Michal krızek Liping Liu Institute of Computer Science Hunan Normal UniversityChangsha 410081HunanChina Institute of Mathematics Academy of SciencesCZ-11567 PragueCzech Republic Department of Mathematical Sciences Lakehead UniversityThunder BayONP7B 5E1Canada Department of Applied Mathematics Anhui Agricultural UniversityHefei230036AnhuiChina

Pyramidal elements are often used to connect tetrahedral and hexahedral elements in the finite element *** this paper we derive three new higher order numerical cubature formulae for pyramidal elements.

关键词： Reference pyramidal element nonlinear systems of algebraic equations Bramble-Hilbert lemma triangular tetrahedral and pyramidal numbers

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Dating of zircon from high-grade rocks:Which is the most reliable method?

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Geoscience Frontiers 2014年第4期5卷 515-523页

作者： Alfred krner Yusheng Wan Xiaoming Liu Dunyi Liu Beijing SHRIMP Centre Institute of GeologyChinese Academy of Geological Sciences State Key Laboratory of Continental Dynamics Department of GeologyNorthwest University

Magmatic zircon in high-grade metamorphic rocks is often characterized by complex textures as revealed by cathodoluminenscence （CL） that result from multiple episodes of recrystallization, over- growth, Pb-loss and modifications through fluid-induced disturbances of the crystal structure and the original U-Th-Pb isotopic systematics. Many of these features can be recognized in 2-dimensional CL images, and isotopic analysis of such domains using a high resolution ion-microprobe with only shallow penetration of the zircon surface may be able to reconstruct much of the magmatic and complex post- magmatic history of such grains. In particular it is generally possible to find original magmatic domains yielding concordant ages. In contrast, destructive techniques such as LA-ICP-MS consume a large volume, leave a deep crater in the target grain, and often sample heterogeneous domains that are not visible and thus often yield discordant results which are difficult to interpret. We provide examples of complex magmatic zircon from a southern Indian granulite terrane where SHRIMP lI and LA-ICP-MS analyses are compared. The SHRIMP data are shown to be more precise and reliable, and we caution against the use of LA-ICP-MS in deciphering the chronology of complex zircons from high-grade terranes.

关键词： Zircon datingHigh-grade rockSHRIMPLA-ICP-MS

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Biodegradable zinc-iron alloys: Complex study of corrosion behavior,mechanical properties and hemocompatibility

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Progress in Natural Science:Materials International 2021年第2期31卷 279-287页

作者： Z.Orságová králová R.Gorejová R.Orin?aková M.Petra?ková A.Orin?ak M.Kupková M.Hrubov?a?ková T.Sop?ák M.Baláz? I.Maska?ová A.kova.c?íková K.kova. Department of Physical Chemistry Faculty of Science Pavol Jozef ?afa?rik University in Ko?ice Institute of Materials Research Slovak Academy of Sciences Institute of Geotechnics Slovak Academy of Sciences University of Veterinary Medicine and Pharmacy in Ko?ice Department of Animal Nutrition Dietetics and Animal Breeding

Zn-Fe alloys have been extensively investigated in this study with a view to their application as biodegradable bone implants. Biogenic element zinc is a very appropriate metal because of the ideal degradation rate compared to those of Mg and Fe. Studied alloys were made by compressing metallic powders in a content ratio of 100% Zn,Zn-1% Fe, Zn-2% Fe, Zn-5% Fe and Zn-10% Fe and sintering at 350°C for 1 h. Prepared samples were examined by optical microscopy, SEM and XRD. Corrosion behavior, mechanical testing and hemocompatibility were observed subsequently. The electrochemical performance of such materials was studied in the simulated body fluids. The enhanced corrosion rate was observed for all samples after iron addition due to the micro-galvanic effect between the pure Zn and Zn;Fe intermetallic phase. The corrosion rate of the Zn-5% Fe alloyed sample was more than 20-times higher（2.89 mmpy） compared to the pure Zn. However, alloying with more than 5 wt %of iron diminished the mechanical performance of the material. Therefore, the performed mechanical and hemocompatibility tests showed acceptable biocompatibility of zinc and Zn-1% Fe and Zn-2% Fe samples.

关键词： Biodegradable materials Zinc Iron Alloy Corrosion behavior Hemocompatibility

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Aquatic hyphomycetes in the lateritic cave streams of Southwestern India

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Studies in Fungi 2021年第1期6卷 480-487页

作者： Sharathchandra K Sridhar kr Department of Biosciences Mangalore UniversityMangalagangotriMangaloreKarnatakaIndia Centre for Environmental Studies Yenepoya(deemed to be)UniversityMangaloreKarnatakaIndia

For the first time,assemblage and diversity of aquatic hyphomycetes were investigated in four lateritic cave streams of the southwest coast of *** study includes physicochemical features of cave habitats and stream *** richness,diversity and equitability of aquatic hyphomycetes in foam,water,leaf litter and woody litter(bark and cambium)have been *** cave streams yielded up to 21 species of aquatic hyphomycetes,which is comparable to the population in nearby *** leaf litter of cave streams consist of highest number of species,while it was the lowest in the foam samples(15 vs.7 spp.).Cave stream water,bark and cambium consist of 14,11 and 9 species,***’s and Shannon’s diversities were the highest in water samples,while the Pielou’s equitability was highest in foam *** species richness as well as the core-group(highly frequent)aquatic hyphomycetes are comparable with nearby *** megalospora,Anguillospora angulata,***,Condylospora spumigena,Ingoldiella fibulata and Trinacrium subtile were the new records to the coastal region of southwest India.

关键词： Bark−cambium−diversity foam−leaf litter−water−woody litter

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