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Frontier of the paleo-Tethys Ocean in the western Mediterranean:Isotopic(Sm-nd)constraints on sources of devonian units from Menorca Island

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Geoscience Frontiers 2024年第5期15卷 323-338页

作者： Ricardo Arenas Jose M.Fuenlabrada Cristian Timoner Rubén díez Fernández Esther Rojo-pérez departamento de Mineralogía y petrología and Instituto de Geociencias(UCM CSIC)Universidad ComplutenseMadridSpain Unidad de Geocronología(CAI de Ciencias de la Tierra y Arqueometría) Universidad ComplutenseMadridSpain Bayerisches Geoinstitut University of BayreuthBayreuthGermany Instituto Geológico y Minero de España–CSIC SalamancaSpain

The c.1000-m-thick pre-orogenic devonian mainly metapelitic sequence of north Menorca Island shows a fairly complete stratigraphic *** rocks of this sequence indicate gradually increasing deeper marine conditions of sedimentation towards its uppermost ***,the obtained sedimentary characteristics resemble those related to a deep and narrow basin-associated *** sills of Ti-augite-bearing alkaline gabbros occur within the devonian *** intensity of Variscan deformation increases downwards through the *** to the characteristics of the devonian sequence and its location within the Variscan Orogen,a correlation with similar units located in the southern sectors of the Central Iberian Zone(Iberian Massif)is *** devonian metapelitic rocks have geochemical characteristics suggesting that they represent moderately recycled mature siliciclastic sediments,generated from erosion of distant source areas belonging to an upper continental *** relatively narrow range of variation observed in initial^(143)nd/^(144)nd ratios supports a similar source for the Menorcan slates(0.51165–0.51182).However,a marked trend is observed in these isotope ratios,from lower values at the base of the stratigraphic column(minimum value of 0.511941)to higher values at the top(maximum value of 0.512131).The^(147)Sm/^(144)nd ratios vary between 0.1074 and 0.1238,within the range defined for siliciclastic rocks with felsic crustal *** nd model ages define a narrow range between 1496 Ma and 1754 Ma(Late paleoproterozoic–Early Mesoproterozoic),and they are consistently younger *** data rule out a provenance from the erosion of the West Africa Craton,as they are more compatible with a provenance from regions located in the Trans-Saharan Belt or Sahara *** characteristics of the Menorcan devonian sequence are compatible with its deposition in a narrow and deep peri-Gondwanan transtensional basin,gener

关键词： Western paleo-Tethys frontiers Menorca Island Sm-nd isotopic constraints devonian sequence provenance in Gondwana

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Beacon-Less Geographic Routing in Real Wireless Sensor networks

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Journal of Computer Science & Technology 2008年第3期23卷 438-450页

作者： Juan A.Sánchez Rafael Marín-pérez pedro M.Ruiz department of Information and Communications Engineering University of MurciaSpain

Geographic Routing （GR） algorithms require nodes to periodically transmit HELLO messages to allow neighbors to know their positions （beaconing mechanism）. Beacon-less routing algorithms have recently been proposed to reduce the control overheads due to these messages. However, existing beacon-less algorithms have not considered realistic physical layers. Therefore, those algorithms cannot work properly in realistic scenarios. In this paper we present a new beacon-less routing protocol called BOSS. Its design is based on the conclusions of our open-field experiments using Tmote-sky sensors. BOSS is adapted to error-prone networks and incorporates a new mechanism to reduce collisions and duplicate messages produced during the selection of the next forwarder node. We compare BOSS with Beacon-Less Routing （BLR） and Contention-Based Forwarding （CBF） algorithms through extensive simulations. The results show that our scheme is able to *** almost perfect packet delivery ratio （like BLR） while having a low bandwidth consumption （even lower than CBF）. Additionally, we carried out an empirical evaluation in a real testbed that shows the correctness of our simulation results.

关键词： geographic routing beacon-less forwarding performance evaluation real deployment

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Conditioning of a Calcaric Soil with Biosolid and Compost Under Laboratory Conditions: Exploration of Soil property Evolution

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pedosphere 2019年第2期29卷 266-272页

作者： José Antonio GALán-pérez Aránzazu pE?A Andalusian Institute for Earth Sciences Spanish National Research Council-University of Granada (CSIC-UGR)

dear Editor,Conditioning of soils of low organic carbon(OC)is essential to establish optimal fertility conditions for the growth and development of future crops.A usual practice is the substrates of various origins,among which cheap wastes from agricultural or urban residues with high organic matter(OM)content have been gaining popularity in the last *** increase in soil OM is considered a desirable trait in agriculture because of its benefits.

关键词： Exploration Conditioning Laboratory

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Anchor Root development: A World within Worlds

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Molecular plant 2020年第8期13卷 1105-1107页

作者： JoséManuel pérez-pérez Instituto de Bioingeniería Universidad Miguel Hernández03202 ElcheSpain

Many plant species develop shoot-borne adventitious roots(ARs)with specialized functions that contribute to plant adaptability by enhancing resource capture and stress *** Arabidopsis,as in many dicots,the postembryonic root system is primarily composed of lateral roots(LRs),which originate from the xylem pole pericycle cells through a process that involves periodic oscillation in gene expression mediated by a β-carotenoidderived signal(dickinson et al.,2019).Our understanding of the key molecular and signaling events regulating AR initiation has recently been obtained from studies in Arabidopsis,where ARs are formed on etiolated hypocotyls upon transfer to light(Lakehal et al.,2019)or from excised leaf explants(Zhang et al.,2019).Anchor roots(AnRs)are a type of AR that originate immediately below the root-hypocotyl junction in an auxindependent manner and that require a diapocarotenoid-derived signal(anchorene)to emerge(Jia et al.,2019).AnR primordia activation may represent a generic mechanism to compensate for the loss of the growth potential of the primary root(pR),as it is enhanced by mutations affecting pR growth,by whole-root excision or by nitrogen deficiency(Jia et al.,2019).A recent paper by Bai et al.(2020)provides direct evidence that a regulatory module involving the Ap2/ERF transcription factor ABSCISIC ACId InSEnSITIVE 4(ABI4),the mitogen-activated protein kinases(MApKs)MpK3 and MpK6,and the phosphatase pp2C12 controls AnR emergence in Arabidopsis.

关键词： roots Arabidopsis Root

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Helminth parasites of freshwater fishes from Cuatro Ciénegas,Coahuila,in the Chihuahuan desert of Mexico:inventory and biogeographical implications

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Integrative Zoology 2014年第3期9卷 328-339页

作者： Rogelio AGUILAR-AGUILAR Andrés MARTÍnEZ-AQUInO Héctor ESpInOSA-pÉrez Gerardo pÉrez-pOnCE dE LEÓn Comparative Biology department National Autonomous University of MexicoMexico CityMexico Laboratory of Helminthology National Autonomous University of MexicoMexico CityMexico Graduate program in Biological Sciences National Autonomous University of MexicoMexico CityMexico national Collection of Fish National Autonomous University of MexicoMexico CityMexico

As part of an ongoing inventory of the helminth parasites of freshwater fishes in Mexico, 570 individual fish were collected between Apr 2008 and Oct 2011 in 26 localities along the Cuatro Ciénegas region in Coahuila State, northern Mexico. Seventeen species of hosts, mostly corresponding to nearctic freshwater elements, were studied. A total of 8324 individual worms were collected during this survey, representing 25 species of helminths, of which 9 were digeneans, 3 monogeneans, 3 acanthocephalans, 9 nematodes and 1 cestode. Most of the records in this checklist represent new host or locality records. The information provided in this checklist may be helpful for our understanding of the biodiversity and historical biogeography of this host-parasite system, because in the Cuatro Ciénegas region occur a nearctic freshwater fish fauna, along with neotropical and endemic elements, and from a biogeographical point of view, this may represent a transitional area.

关键词： Acanthocephala Cestoda Cuatro Ciénegas digenea freshwater fish Mexico Monogenea nematoda

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When the sum adds up:Using public procurement to avoid intersectoral cooperation barriers in lagging regions

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International Journal of Innovation Studies 2023年第4期7卷 291-300页

作者： Celia díaz-Catalán Josep Lobera department of Sociology:Methods and Theory of the Universidad Complutense de Madrid Spain department of Sociology Universidad Autonoma de MadridSpain

This study examined the application of an instrument that supports intersectoral collaboration in *** the strategic action field(SAF)approach,we analyze a precommercial public procurement instrument developed in Andalusia(Spain).drawing on qualitative and quantitative data,we shed light on the dynamics of collaboration between public and private innovation *** show how a change in dynamics can generate a reduction in barriers to intersectoral *** presents an opportunity to promote the transfer of knowledge and strengthen a strategic field of action,such as the agroindustry,which is the main source of income for several people in Andalusia,a European region that is developmentally lagging.

关键词： pre-commercial public procurement Innovation Regional innovation system Valley of death

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nucleoside modified mRnA-lipid nanoparticles as a new delivery platform for the repair of the injured spinal cord

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neural Regeneration Research 2025年第8期20卷 2311-2312页

作者： Krisztián pajer Tamás Bellák Antal nógrádi department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary

Spinal cord injury and treatment opportunities:The adult mammalian spinal cord has a very limited capacity for spontaneous regeneration due to various intrinsic molecular and cellular *** the spinal cord neurons have the capacity to regenerate their axons,the expression of growth inhibitory factors,lack or suppression of proper guidance cues,and profound inflammatory responses do not permit successful regeneration(Khyeam et al.,2021).

关键词： injured capacity modified

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Excitotoxicity-induced endocytosis as a potential target for stroke neuroprotection

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neural Regeneration Research 2021年第2期16卷 300-301页

作者： Margarita díaz-Guerra Instituto de Investigaciones Biomédicas“Alberto Sols” Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

decreased neuronal survival-signaling and brain damage:Stroke is a leading cause of death worldwide,the major cause of adult disability and second of *** spite of the social and economic importance of this disorder,an... 详细信息

关键词： drugs death damage

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Helicobacter pylori HopE and HopV porins present scarce expression among clinical isolates

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World Journal of Gastroenterology 2010年第3期16卷 320-329页

作者： Maritza Lienlaf Juan pablo Morales María Inés díaz Rodrigo díaz Elsa Bruce Freddy Siegel Gloria León paul R Harris Alejandro Venegas Microbial pathogenesis and Vaccine Biotechnology Laboratory Department of Molecular Genetics and MicrobiologyFaculty of Biological SciencesPontificia Universidad Católica de Chile Gastroenterology Unit Faculty of MedicineUniversidad Austral de Chile Institute of Biochemistry Faculty of SciencesUniversidad Austral de Chile department of pediatrics School of MedicinePontificia Universidad Católica de Chile

AIM:To evaluate how widely Helicobacter pylori (H. pylori ) HopE and HopV porins are expressed among Chilean isolates and how seroprevalent they are among infected patients in ***: H. pylori hopE and hopV genes derived from strain CHCTX-1 were cloned by polymerase chain reaction (pCR), sequenced and expressed in Escherichia coli Ad494 (dE3). Gel-purified porins were used to prepare polyclonal antibodies. The presence of both genes was tested by pCR in a collection of H. pylori clinical isolates and their expression was detected in lysates by immunoblotting. Immune responses against HopE, HopV and other H. pylori antigens in sera from infected and non-infected patients were tested by Western blotting using these sera as f irst antibody on recombinant H. pylori ***: pCR and Western blotting assays revealed that 60 and 82 out of 130 Chilean isolates carried hopE and hopV genes, respectively, but only 16 and 9, respectively, expressed these porins. IgG serum immunoreactivity evaluation of 69 H. pylori-infected patients revealed that HopE and HopV were infrequently recognized (8.7% and 10.1% respectively) compared to H. pylori VacA (68.1%) and CagA (59.5%) antigens. Similar values were detected for IgA serum immunoreactivity against HopE (11.6%) and HopV (10.5%) although lower values for VacA (42%) and CagA (17.4%) were obtained when compared to the IgG ***: A scarce expression of HopE and HopV among Chilean isolates was found, in agreement with the infrequent seroconversion against these antigens when tested in infected Chilean patients.

关键词： Helicobacter pylori Gene expression HopE and HopV porins Antigens Immune response

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demographic trends and climate over 35 years in the Barro Colorado 50 ha plot

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Forest Ecosystems 2017年第4期4卷 273-285页

作者： Richard Condit Rolando pérez Suzanne Lao Salomón Aguilar Stephen p. Hubbell Field Museum of natural History 1400 S

Background： The first three censuses of the 50-ha plot at Barro Colorado Island spanned an unusually harsh dry season during the 1983 El nitro. By the early 1990s, we had documented increases in tree mortality, tree growth, and large population fluctuations of many species during the 1982-1985 census interval. At the time, we asserted that increasing drought frequency would greatly affect the forest. With the benefit of five more censuses at Barro Colorado from 1995-2015, we can now put the 1980 conditions in a longer perspective and test the hypothesis that increasing droughtiness has continued to change the forest. Methods： A 50-ha forest plot on Barro Colorado Island was censused eight times, in 1982 and every five years since 1985. All free-standing woody stems were measured, mapped, and identified in each census. Results： 1） The period 1982-1992 included several extreme dry seasons, not just 1983, but since then there have been few such droughts. 2） dbh growth declined from a peak in the early 1980s to its lowest in the early 1990s. From 1995-2015 it increased slightly, but not returning to the initial peak. nearly every species and all dbh categories followed the same pattern. 3） The elevated stand-wide mortality rate of large trees during the 1982-1985 drought has not returned, and most individual species showed the same pattern of elevated mortality in the 1980s followed by low and fairly stable mortality after 1990. 4） Sapling mortality declined after 198,5, but rose again in the late-90s, so the 1980s drought period no longer looks unusual. Mortality of individual species＇ saplings fluctuated erratically, including cases where mortality during the drought was lower than after. 5） population sizes of individual species fluctuated in all possible directions. Some species declined precipitously during the drought, then recovered, but others did not recover. Other species increased in abundance during the drought. Conclusions＂ droughts of the 1980s elevated tr

关键词： demographic trends climate

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