Resultados totales (Incluyendo duplicados): 45603
Encontrada(s) 4561 página(s)
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357787
Dataset. 2024

SUPPLEMENTARY MATERIAL FOR CHEMICAL LOOPING OF SYNTHETIC ILMENITE. PART I: ADDRESSING CHALLENGES OF KINETIC TGA MEASUREMENTS WITH H2 [DATASET]

  • Steiner, Thomas
  • Schulze, Kai
  • Kienzl, Norbert
  • Pauritsch, Magdalena
  • Hacker, Viktor
  • Bock, Sebastian
  • Abad Secades, Alberto
  • Scharler, Robert;
  • Anca-Couce, Andrés
2. Experimental runs An exemplary for an entire isothermal experiment is given in Fig. 2. It shows the initial conditioning, consisting of ten redox cycles, followed by the actual experiment, consisting of seven isothermal plateaus. These isothermal plateaus each consist of four redox cylces employing the following H2 volume fractions: 50, 50, 30, 16.66 vol%. The 50 vol% run was repeated to possibly detect inconsistencies introduced through the preceding temperature change. Between reduction and oxidation or when changing from one temperature to another, the system was purged with nitrogen. 3. Reproducibility In order to reach the kinetic regime small sample masses (< 2 mg) and high gas flow rates (> 300 ml · min−1) were required. The reproducibility of the measurements was assessed at these conditions. All isothermal runs were repeated six times, all on different days using fresh solid samples and the same TGA programs. Fig. 3 shows the conversion rate dX/dt. for the individual runs during reduction at T = 900 ◦C. Even though, there were noticeable deviations between individual sets, the overall reproducibility of results was convenient. 4. Gas conversion The hydrogen conversion XH2 during the TGA experiments was estimated to ensure sufficient gas supply and negligible impact of steam produced. Low gas conversion signifies that enough gas was present and the atmosphere did not change significantly during the experiments. The mass balance ˙V | in · ci{nz· yH2,i}n n˙ H2,in − (m0 − m∞) MO · (dX/dt)max = ˙V| out · cou{tz· yH2,ou}t n˙ H2,out (1) was used calculate the molar flow n˙ H2,out of unreacted H2 leaving the reactor at maximum reactivity. This gives the highest possible gas conversion for a specific case, i.e. the worst case scenario for reaching the kinetic regime. The n˙ H2,out was used to calculate the conversion XH2 = n˙ H2,in − n˙ H2,out n˙ H2 in at different temperatures and H2 contents. The results are summarized in Table 1. As can be seen, the hydrogen conversion XH2 was low (< 2 %) for all cases, which means that neither gas starvation nor limitations due to steam generation should have played a significant role. 5. Isoconversional methods The additional plots for the isoconversional methods (i.e. evaluation of linear regression and R2) which were referenced in our main work are given in this section. Figure 4 shows the differential isoconversional method for one exemplary experiment with higher mass at 50 vol%H2. Except for the first point (X=0.1) a reasonably high R2 was again achieved. Figure 5 depicts the analysis of the nonisothermal reductions with the differential isoconversional method. Figure 6 shows the results for the integral isoconversional KAS method [1]. For both methods high R2 values were achieved.-- Under a Creative Commons license CC-BY 4.0 Deed., 1. TGA setup.-- 2. Experimental runs.-- 3. Reproducibility.-- 4. Gas conversion.-- 5. Isoconversional methods.-- 6. CFD study.-- 1. TGA setup: A schematic of the experimental setup is given in Fig. 1. The TGA experiments were performed with a NETZSCH STA 449 F3 Jupiter. It consisted of an inner reactor and an outer shell, both made of Al2O3. Different sample holders (crucible, plate, basket) could be mounted on top of a vertical sample carrier at the center of the inner reactor. If not stated differently, the experiments were conducted with the plate (NETZSCH alumina slipon plate, diameter 17 mm). The solid sample was placed on this sample holder. A type S thermocouple within the vertical sample carrier was used for temperature measurements. It had been calibrated with calcium oxalate and pure metal melting points (In, Sn, Bi, Zn, Al, Ag) prior to the experiments. Two different gas flows were relevant in the TGA setup. Firstly, a protective gas flow (20 ml · min−1 N2), which was always switched on, entered the reactor below the sample carrier. Secondly, the main gas flow (H2, O2, N2 and mixtures thereof) entered a water vapor generator, where a predefined mass flow of H2O could be added. The gas mixture was preheated to 180 ◦C and then entered the TGA system from the side. It was heated to the desired temperature during the upwards flow in the outer shell. After reaching the top of the reactor, the gases flowed downwards into the inner reaction chamber, which contained the solid sample, before leaving the reactor via the gas outlet. Both, the main and protective gas flows, were controlled by Bronkhorst mass flow controllers (MFC, 0-250 ml · min−1). 6. CFD study A small, transient CFD study of the TGA was conducted to gauge the temporal evolution of the hydrogen concentration above the solid sample. The TGA geometry of Fig. 1 was simplified (mostly at the inlet and the outlet). Simulations were performed in ANSYS Fluent 2023 R1 using the lamiar flow model and a fixed hydrogen diffusivity of 5·10−4 m2 · s−1. Heat transfer was considered via conduction, convection and radiation (Discrete Ordinate model). A homogeneous velocity distribution was assumed at the inlet (T = 200 ◦C, yH2 = 0.5). The heating was simulated via isothermal walls (T = 800 ◦C) which quickly heated the gases to the operating temperature. At the outlet, a simple pressure outlet condition was chosen. The discretization methods for momentum, mass and heat transfer were set to second order (only Discrete Ordinate was first order), and a first order implicit time solver (time step of 0.1 s) was chosen. Fig. 7 (a) shows the simplified TGA model, Fig. 7 (b) shows the velocity profile in steadystate and Fig. 7 (c) shows the H2 concentration profile at t = 7 s for one exemplary case. As can be seen, the flow around the plate leads to nearly zero velocity at the sample, which could possibly lead to diffusion limitations. More importantly, Fig. 7 (c) suggests an appreciable spatial gradient of hydrogen due to axial dispersion. The temporal evolution of the hydrogen concentration above the plate was given in our main work., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357787
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357787
HANDLE: http://hdl.handle.net/10261/357787
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357787
PMID: http://hdl.handle.net/10261/357787
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357787
Ver en: http://hdl.handle.net/10261/357787
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357787

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357784
Dataset. 2023

SUPPLEMENTARY INFORMATION FOR GLOBAL TREE GROWTH RESILIENCE TO COLD EXTREMES FOLLOWING THE TAMBORA VOLCANIC ERUPTION

  • Gao, Shan
  • Camarero, Jesús Julio
  • Babst, Flurin
  • Liang, Eryuan
This PDF file includes: Supplementary Fig. 1 to 5 and Supplementary Table 1., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357784
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357784
HANDLE: http://hdl.handle.net/10261/357784
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357784
PMID: http://hdl.handle.net/10261/357784
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357784
Ver en: http://hdl.handle.net/10261/357784
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357784

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357790
Dataset. 2023

HMT CORRELATIONS TO TRANSCRIPTION FACTOR ACTIVITY IN GTEX [DATASET]

  • Pérez, Marcos Francisco
  • Sarkies, Peter
HMT correlations to transcription factor activity in GTEx., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357790
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357790
HANDLE: http://hdl.handle.net/10261/357790
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357790
PMID: http://hdl.handle.net/10261/357790
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357790
Ver en: http://hdl.handle.net/10261/357790
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357790

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357793
Dataset. 2023

SUPPLEMENT OF HOLOCENE CLIMATES OF THE IBERIAN PENINSULA: POLLEN-BASED RECONSTRUCTIONS OF CHANGES IN THE WEST–EAST GRADIENT OF TEMPERATURE AND MOISTURE

  • Liu, Mengmeng
  • Shen, Yicheng
  • González-Sampériz, Penélope
  • Gil-Romera, Graciela
  • Braak, Cajo J. F. ter
  • Prentice, Iain Colin
  • Harrison, Sandy P.
PDF file contains: Suplemmentary Figures S1-S11 and Suplemmentary Tables S1-S2. © Author(s) 2023. CC BY 4.0 License. The copyright of individual parts of the supplement might differ from the article licence., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357793
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357793
HANDLE: http://hdl.handle.net/10261/357793
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357793
PMID: http://hdl.handle.net/10261/357793
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357793
Ver en: http://hdl.handle.net/10261/357793
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357793

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357810
Dataset. 2023

NCI60 CHIP-SEQ AND RNA-SEQ FILES [DATASET]

  • Pérez, Marcos Francisco
  • Sarkies, Peter
The N-terminal tails of eukaryotic histones are frequently posttranslationally modified. The role of these modifications in transcriptional regulation is well-documented. However, the extent to which the enzymatic processes of histone posttranslational modification might affect metabolic regulation is less clear. Here, we investigated how histone methylation might affect metabolism using metabolomics, proteomics, and RNA-seq data from cancer cell lines, primary tumour samples and healthy tissue samples. In cancer, the expression of histone methyltransferases (HMTs) was inversely correlated to the activity of NNMT, an enzyme previously characterised as a methyl sink that disposes of excess methyl groups carried by the universal methyl donor S-adenosyl methionine (SAM or AdoMet). In healthy tissues, histone methylation was inversely correlated to the levels of an alternative methyl sink, PEMT. These associations affected the levels of multiple histone marks on chromatin genome-wide but had no detectable impact on transcriptional regulation. We show that HMTs with a variety of different associations to transcription are co-regulated by the Retinoblastoma (Rb) tumour suppressor in human cells. Rb-mutant cancers show increased total HMT activity and down-regulation of NNMT. Together, our results suggest that the total activity of HMTs affects SAM metabolism, independent of transcriptional regulation., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357810
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357810
HANDLE: http://hdl.handle.net/10261/357810
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357810
PMID: http://hdl.handle.net/10261/357810
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357810
Ver en: http://hdl.handle.net/10261/357810
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357810

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357931
Dataset. 2024

LIVE FUEL MOISTURE CONTENT ESTIMATES IN THE WESTERN USA USING RADIOMETER-RADAR-LIDAR SYNERGY

  • Chaparro, David
  • Jagdhuber, Thomas
  • Piles, María
  • Jonard, François
  • Fluhrer, Anke
  • Vall-llossera, Mercè
  • Camps, Adriano
  • López-Martínez, Carlos
  • Fernández-Morán, Roberto
  • Baur, Martín J.
  • Feldman, Andrew F.
  • Fink, Anita
  • Entekhabi, Dara
This dataset contains estimates of Live Fuel Moisture Content (LFMC) in the Western United States. LFMC is the percentage of vegetation water mass over the dry biomass of the plants. Here, LFMC is retrieved by isolating the water component of the passive microwaves vegetation optical depth (VOD) signal at three frequencies: L-band (1.4 GHz), X-band (10.65 GHz) and Ku-band (18.7 GHz). Each frequency represents a different canopy sensing depth. To isolate LFMC from VOD, auxiliary information to account for the biomass and structure of the vegetation has been used: radar backscatter data from Sentinel-1 and canopy height data from GEDI/Sentinel-2. The dataset spans between April 2015 and December 2018 for L- and X-bands, and between April 2015 and July 2018 for Ku-band retrievals., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357931
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357931
HANDLE: http://hdl.handle.net/10261/357931
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357931
PMID: http://hdl.handle.net/10261/357931
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357931
Ver en: http://hdl.handle.net/10261/357931
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357931

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357933
Dataset. 2022

RECONSTRUCTED ANETO GLACIER SURFACES FROM HISTORIC AERIAL IMAGE PHOTOGRAMMETRY (1981) AND REMOTE SENSING TECHNIQUES (2020, 2021, 2022) [DATASET]

  • Vidaller, Ixeia
  • Izagirre, Eñaut
  • Rio, Luis Mariano del
  • Alonso-González, Esteban
  • Rojas-Heredia, Francisco
  • Serrano, Enrique
  • Moreno Caballud, Ana
  • López-Moreno, Juan I.
  • Revuelto, Jesús
The Aneto Glacier, is the largest glacier in the Pyrenees. Its shrinkage and wastage have been continuous in recent decades, and there are signs of accelerated melting in recent years. In this study, changes in the surface and ice thickness of the Aneto Glacier from 1981 to 2022 are investigated using historical aerial imagery, airborne LiDAR point clouds, and UAV imagery. A GPR survey conducted in 2020, combined with data from photogrammetric analyses, allowed us to reconstruct the current ice thickness and also the existing ice distribution in 1981 and 2011. Over the last 41 years, the total glaciated area has shrunk by 64.7% and the ice thickness has decreased, on average, by 30.5 m. The mean remaining ice thickness in autumn 2022 was 11.9 m, as against the mean thicknesses of 32.9 m, 19.2 m reconstructed for 1981 and 2011 and 15.0 m observed in 2020 respectively. The results demonstrate the critical situation of the glacier, with an imminent segmentation into two smaller ice bodies and no evidence of an accumulation zone. We also found that the occurrence of an extremely hot and dry year, as observed in the 2021–2022 season, leads to a drastic degradation of the glacier, posing a high risk to the persistence of the Aneto Glacier, a situation that could extend to the rest of the Pyrenean glaciers in a relatively short time., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357933
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357933
HANDLE: http://hdl.handle.net/10261/357933
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357933
PMID: http://hdl.handle.net/10261/357933
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357933
Ver en: http://hdl.handle.net/10261/357933
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357933

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357934
Dataset. 2022

CETUS: CETACEAN MONITORING SURVEYS IN THE EASTERN NORTH ATLANTIC

  • Correia, Ana M.
  • Oliveira-Rodrigues, Cláudia
  • Gandra, Miguel
  • Liberal, Marcos
  • Valente, Raúl
  • Gil, Ágatha
  • Rosso, Massimiliano
  • Pierce, Graham J.
  • Sousa-Pinto, Isabel
5 files.-- The CETUS dataset contains effort-based occurrence records collected during a cetacean monitoring programme in the Eastern North Atlantic, since 2012, The CETUS dataset contains data collected within the CETUS Project (www.cetusproject.com), a cetacean monitoring programme in the Eastern North Atlantic, running since 2012. The project is led by the Interdisciplinary Centre of Marine and Environmental Research (CIIMAR - University of Porto, Portugal), in partnership with TRANSINSULAR - Grupo ETE, a Portuguese company for maritime transport, that offers its cargo ships to be used as a platforms of opportunity to monitor cetaceans along routes between Continental Portugal and Madeira, Azores, Canary and Cape Verde islands. On-board trained marine mammal observers collect data on: survey effort, cetacean and other megafauna occurrences, as well as marine traffic and meteorological conditions. Data is provided in the recent OBIS-ENV-DATA format, and comprises 8913 georeferenced positions associated with 3195 occurrences of 44 marine taxa, This research was partially funded by the EU FEDER/FEMP and Portuguese Foundation for Science and Technology (FCT) under the Portugal2020 (Lisboa2020, Algarve2020 and MAR2020) Programme through project OBSERVA.PT (MAR-01.04.02-FEAMP-0002), Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357934
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357934
HANDLE: http://hdl.handle.net/10261/357934
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357934
PMID: http://hdl.handle.net/10261/357934
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357934
Ver en: http://hdl.handle.net/10261/357934
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357934

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357988
Dataset. 2023

THE TRANSCRIPTIONAL REGULATOR GLYR1 MAY MEDIATE NNMT DOWN-REGULATION [DATASET]

  • Pérez, Marcos Francisco
  • Sarkies, Peter
The transcriptional regulator GLYR1 may mediate NNMT down-regulation., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357988
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357988
HANDLE: http://hdl.handle.net/10261/357988
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357988
PMID: http://hdl.handle.net/10261/357988
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357988
Ver en: http://hdl.handle.net/10261/357988
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357988

Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357999
Dataset. 2023

ALTERATION OF SAM/SAH RATIO TRANSCRIPTIONALLY REGULATES NNMT AND HMTS [DATASET]

  • Pérez, Marcos Francisco
  • Sarkies, Peter
Alteration of SAM/SAH ratio transcriptionally regulates Nnmt and HMTs., Peer reviewed

Proyecto: //
DOI: http://hdl.handle.net/10261/357999
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357999
HANDLE: http://hdl.handle.net/10261/357999
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357999
PMID: http://hdl.handle.net/10261/357999
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357999
Ver en: http://hdl.handle.net/10261/357999
Digital.CSIC. Repositorio Institucional del CSIC
oai:digital.csic.es:10261/357999

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