1,721,940 research outputs found
La desaparició dels boscos submarins pot portar a la pèrdua de biodiversitat, la disminució de la qualitat de l'aigua i la desprotecció de la costa
No full text[EN] In this May's "In Depth" we interview Aurora M Ricart, who has just landed at the ICM-CSIC to delve deeper into the effects of climate crisis on marine ecosystems, but specifically on underwater forests[ES] En el "A fondo" de este mes de mayo entrevistamos a Aurora M Ricart, que acaba de aterrizar en el ICM-CSIC con el objetivo de estudiar el impacto de la crisis climática sobre los ecosistemas marinos, pero especialmente sobre los bosques marinos[CAT] A l'”A fons” d'aquest mes de maig entrevistem l’Aurora M Ricart, que acaba d'aterrar a l'ICM-CSIC amb l’objectiu d’estudiar l'impacte de la crisi climàtica sobre els ecosistemes marins, però especialment sobre els boscos marinsPeer reviewe
Decapods abundance, habitat, landscape, and geographical attributes in the NW Mediterranean Posidonia oceanica seagrass meadows [Dataset]
No full textThis dataset presents the decapod species and abundance, along with the habitat (detached seagrass leaves, fine fraction of detritus, detrital macroalgae, organic matter in sediments, seagrass shoot density and height of unburried rhizomes), landscape (landscape configuration) and geographical attributes (inlet aperture and confinement) in Posidonia oceanica seagrass meadows in 5 localities accross the NW Mediterranean sea.
We found that geographical level attributes (i.e., inlet aperture, confinement) affected the most the decapod assemblages, while we only found a modest contribution from habitat (e.g., detritus biomass, sediment organic matter) and landscape attributes (e.g. fragmentation). We suggest that decapod assemblages are driven by the interaction of multiple processes occurring at different scales and other highly stochastic phenomena such as larval dispersion and recruitmentThis study was supported financially by the Spanish government (projects CTM2010-22273-C02-01 and CTM2013-48027-C3-1-R). The Spanish government also supported AMR (scholarship BES-2011-046849)Table 1. Decapod species and number of total individuals of 5 randomly selected quadrat (40 cm x 40 cm) found in Aiguablava (Ag), Rustella (Ru), Giverola (Gi, Cativa (Ca) and Portlligat (Po) in continuous seagrass meadows of Posidonia oceanica (CO), patches in sand matrix (PS) and patches in rock matrix (PR). Table 2. Habitat attributes and geographical attributes of 5 randomly selected quadrat (40 cm x 40 cm) found in Aiguablava (Ag), Rustella (Ru), Giverola (Gi, Cativa (Ca) and Portlligat (Po) in continuous seagrass meadows of Posidonia oceanica (CO), patches in sand matrix (PS) and patches in rock matrix (PR)Peer reviewe
Data from Persistent kelp forests during a massive decline reveal the importance of land-sea connectivity [Dataset]
No full textThe different datasets present data on the benthic community assemblage in remnant habitat patches of bull kelp in 9 sites in Northern California, US, and related environmental variables driving its composition. For the study we used a combination of in situ field surveys (years 2020 to 2022), remote sensing data (years 2016 to 2022), and a laboratory grazing experiment with urchins (Strongylocentrotus purpuratus). We found that, in addition to the two dominant states (kelp forest vs. urchin barren), there is a third community state dominated by understory canopy-forming macroalgae that stays subsurface. Moreover, bull kelp abundance and cover were positively associated with freshwater flow and proximity to freshwater sources, and bull kelp persistence was positively associated with sand cover, all of which seem to diminish sea urchin abundance and negative effects of sea urchin herbivory on bull kelp. This was also shown in the laboratory experiment where sea urchin herbivory rates on bull kelp decreased with decreasing salinity. Overall, these results suggest that freshwater influence in shallow coastal environments could prevent loss of bull kelp and show that land-sea connections should be considered for species-specific management and conservation actionsFunding for this research was provided by the Anthropocene Institute, The Nature Conservancy, California Sea Grant (Grant #R/HCE-15), and the National Science Foundation (DISES Grant #2108002). AMR received the support of a fellowship from ”La Caixa” Foundation (LCF/BQ/PI23/11970014)”This work contributes to the Institut de Ciències del Mar "Severo Ochoa Centre of Excellence" accreditation CEX2024-001494-S funded by AEI 10.13039/501100011033 of the Spanish Ministry of Science and Innovation1. kelp_data_Ricart_et_al.csv: species abundances collected in 2 x 30m transects and environmental variables from the different study sites from years 2020, 2021 and 2022. 2. kelp_data_Ricart_et al_metadata.csv: metadata related to the above dataset. 3. urchin_salinity_exp_Ricart_et_al.csv: results from laboratory experiment to assess feeding rates of sea urchins (Strongylocentrotus purpuratus) on bull kelp stipes (Nereocystis luetkeana) for 72h at different seawater salinity. 4. urchin_salinity_exp_Ricart_et_al_metadata.csv: metadata related to the above datasetPeer reviewe
mTOR regulates Aurora A via enhancing protein stability
No full textIndiana University-Purdue University Indianapolis (IUPUI)Mammalian target of rapamycin (mTOR) is a key regulator of protein synthesis. Dysregulation of mTOR signaling occurs in many human cancers and its inhibition causes arrest at the G1 cell cycle stage. However, mTOR’s impact on mitosis (M-phase) is less clear. Here, suppressing mTOR activity impacted the G2-M transition and reduced levels of M-phase kinase, Aurora A. mTOR inhibitors did not affect Aurora A mRNA levels. However, translational reporter constructs showed that mRNA containing a short, simple 5’-untranslated region (UTR), rather than a complex structure, is more responsive to mTOR inhibition. mTOR inhibitors decreased Aurora A protein amount whereas blocking proteasomal degradation rescues this phenomenon, revealing that mTOR affects Aurora A protein stability. Inhibition of protein phosphatase, PP2A, a known mTOR substrate and Aurora A partner, restored mTOR-mediated Aurora A abundance. Finally, a non-phosphorylatable Aurora A mutant was more sensitive to destruction in the presence of mTOR inhibitor. These data strongly support the notion that mTOR controls Aurora A destruction by inactivating PP2A and elevating the phosphorylation level of Ser51 in the “activation-box” of Aurora A, which dictates its sensitivity to proteasomal degradation. In summary, this study
is the first to demonstrate that mTOR signaling regulates Aurora-A protein expression and stability and provides a better understanding of how mTOR regulates mitotic kinase expression and coordinates cell cycle progression. The involvement of mTOR signaling in the regulation of cell migration by its upstream activator, Rheb, was also examined. Knockdown of Rheb was found to promote F-actin reorganization and was associated with Rac1 activation and increased migration of glioma cells. Suppression of Rheb promoted platelet-derived growth factor receptor (PDGFR) expression. Pharmacological inhibition of PDGFR blocked these events. Therefore, Rheb appears to suppress tumor cell migration by inhibiting expression of growth factor receptors that in turn drive Rac1-mediate actin polymerization
Chlorophyll a measured on water bottle samples during Aurora Australis cruise AU9407
No full textChlorophyll a measured on water bottle samples during Aurora Australis cruise AU910
A Market Analysis for PVD Coating System of Aurora North America
Full text linkMOT MBA Project-Simon Fraser Universit
Aurora Mas de Gaminde: Dama Enfermera Profesional de la Cruz Roja Española
Full text linkUn número importante de enfermeras, médicos y otros profesionales becados por la Fundación Rockefeller durante el gobierno de la Segunda República Española, realizaron importantes trabajos en Iberoamérica. Autores como Bernabeu, Gascón y Galiana; sacaron a la luz nombres como Manolita Ricart, Montserrat Ripoll y Aurora Más de Gaminde. Este último nombre fue elegido en 2011, por un grupo de enfermeras, para denominar al grupo de Investigación Aurora Más (A.Mas). Inicialmente fue grupo oficial de la Universidad de Zaragoza. Desde 2013 es grupo cooperativo bajo el soporte de la Fundación Index. Este trabajo forma parte de un estudio documental para completar la biografía e historia de vida profesional de Aurora Más de Gaminde
On the role of aurora-A in centrosome function.
No full textInternational audienceMammalian aurora-A belongs to a multigenic family of mitotic serine/threonine kinases comprising two other members: aurora-B and aurora-C. In this review we will focus on aurora-A that starts to localize to centrosomes only in S phase as soon as centrioles have been duplicated, the protein is then degraded in early G1. Works in various organisms have revealed that the kinase is involved in centrosome separation, duplication and maturation as well as in bipolar spindle assembly and stability. Aurora kinases are found in all organisms in which their function has been conserved throughout evolution, namely the control of chromosome segregation. In human, aurora-A has focused a lot of attention, since its overexpression has been found to be correlated with the grade of various solid tumours. Ectopic kinase overexpression in any culture cell line leads to polyploidy and centrosome amplification. However, overexpression of aurora-A in particular cell lines such as NIH3T3 is sufficient to induce growth on soft agar. Those transformed cells form tumours when implanted in immunodeficient mice, indicating that the kinase is an oncogene
Chlorophyll a measured on water bottle samples during Aurora Australis cruise AU9309
No full textPigments measured on water bottle samples during Aurora Australis cruise AU980
Aurora Australis Voyage 7 (KROCK) 1992-93 Chlorophyll a Data
No full textProgress Code: completedStatement: These are old data, and have been archived 20 years after they were collected. Some information regarding their collection has undoubtedly been lost.This dataset contains chlorophyll a data collected by the Aurora Australis on Voyage 7 1992-93, taken in the Prydz Bay region between January and February 1993.<br/><br/>These data were collected as part of ASAC project 40 (The role of Antarctic marine protists in trophodynamics and global change and the impact of UV-B on these organisms)
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