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El Hage R, Sánchez-Manzano D, Humbert V, Carreira S, Rouco V, Sander A, Cuellar F, Seurre K, Lagarrigue A, Mesoraca S, Briatico J, Trastoy J, Santamaría J, Villegas JE. Disentangling Photodoping, Photoconductivity, and Photosuperconductivity in the Cuprates. Phys Rev Lett 2024; 132:066001. [PMID: 38394577 DOI: 10.1103/physrevlett.132.066001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 01/02/2024] [Indexed: 02/25/2024]
Abstract
The normal-state conductivity and superconducting critical temperature of oxygen-deficient YBa_{2}Cu_{3}O_{7-δ} can be persistently enhanced by illumination. Strongly debated for years, the origin of those effects-termed persistent photoconductivity and photosuperconductivity (PPS)-has remained an unsolved critical problem, whose comprehension may provide key insights to harness the origin of high-temperature superconductivity itself. Here, we make essential steps toward understanding PPS. While the models proposed so far assume that it is caused by a carrier-density increase (photodoping) observed concomitantly, our experiments contradict such conventional belief: we demonstrate that it is instead linked to a photo-induced decrease of the electronic scattering rate. Furthermore, we find that the latter effect and photodoping are completely disconnected and originate from different microscopic mechanisms, since they present different wavelength and oxygen-content dependences as well as strikingly different relaxation dynamics. Besides helping disentangle photodoping, persistent photoconductivity, and PPS, our results provide new evidence for the intimate relation between critical temperature and scattering rate, a key ingredient in modern theories on high-temperature superconductivity.
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Affiliation(s)
- R El Hage
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - D Sánchez-Manzano
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - V Humbert
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - S Carreira
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - V Rouco
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - A Sander
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - F Cuellar
- GFMC, Departamento de Física de Materiales, Universidad de Ciencias Físicas, Facultad Complutense de Madrid, 28040 Madrid, Spain
| | - K Seurre
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - A Lagarrigue
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - S Mesoraca
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - J Briatico
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - J Trastoy
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
| | - J Santamaría
- GFMC, Departamento de Física de Materiales, Universidad de Ciencias Físicas, Facultad Complutense de Madrid, 28040 Madrid, Spain
| | - Javier E Villegas
- Laboratoire Albert Fert, CNRS, Thales, Université Paris-Saclay, 91767 Palaiseau, France
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2
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Espina C, Feliu A, Maza M, Almonte M, Ferreccio C, Finck C, Herrero R, Dommarco JR, de Almeida LM, Arrossi S, García PJ, Garmendia ML, Mohar A, Murillo R, Santamaría J, Tortolero-Luna G, Cazap E, Gabriel OO, Paonessa D, Zoss JW, Luciani S, Carvalho A, Schüz J. Latin America and the Caribbean Code Against Cancer 1st Edition: 17 cancer prevention recommendations to the public and to policy-makers (World Code Against Cancer Framework). Cancer Epidemiol 2023; 86 Suppl 1:102402. [PMID: 37852725 DOI: 10.1016/j.canep.2023.102402] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 06/02/2023] [Accepted: 06/15/2023] [Indexed: 10/20/2023]
Abstract
Preventable risk factors are responsible of at least 40% of cases and almost 45% of all cancer deaths worldwide. Cancer is already the leading cause of death in almost half of the Latin American and the Caribbean countries constituting a public health problem. Cost-effective measures to reduce exposures through primary prevention and screening of certain types of cancers are critical in the fight against cancer but need to be tailored to the local needs and scenarios. The Latin America and the Caribbean (LAC) Code Against Cancer, 1st edition, consists of 17 evidence-based recommendations for the general public, based on the most recent solid evidence on lifestyle, environmental, occupational, and infectious risk factors, and medical interventions. Each recommendation is accompanied by recommendations for policymakers to guide governments establishing the infrastructure needed to enable the public adopting the recommendations. The LAC Code Against Cancer has been developed in a collaborative effort by a large number of experts from the region, under the umbrella strategy and authoritative methodology of the World Code Against Cancer Framework. The Code is a structured instrument ideal for cancer prevention and control that aims to raise awareness and educate the public, while building capacity and competencies to policymakers, health professionals, stakeholders, to contribute to reduce the burden of cancer in LAC.
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Affiliation(s)
- Carolina Espina
- International Agency for Research on Cancer (IARC/WHO), Environment and Lifestyle Epidemiology Branch, 25 avenue Tony Garnier CS 90627, 69366 CEDEX 07 Lyon, France.
| | - Ariadna Feliu
- International Agency for Research on Cancer (IARC/WHO), Environment and Lifestyle Epidemiology Branch, 25 avenue Tony Garnier CS 90627, 69366 CEDEX 07 Lyon, France
| | - Mauricio Maza
- Pan American Health Organization (PAHO), Cancer Prevention and Control, Washington, DC 20037, United States
| | - Maribel Almonte
- World Health Organization (WHO), Department of Sexual and Reproductive Health and Research, Geneva, Switzerland
| | - Catterina Ferreccio
- Departamento de Salud Pública, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile; Advanced Center for Chronic Diseases ACCDIS, Santiago, Chile
| | - Carolyn Finck
- Departamento de Psicología, Universidad de los Andes, Bogotá, Colombia
| | - Rolando Herrero
- Agencia Costarricense de Investigaciones Biomédicas, Fundación INCIENSA, Costa Rica
| | | | - Liz Maria de Almeida
- National Cancer Institute of Brazil (INCA), Prevention and Surveillance, Rio de Janeiro, Brazil
| | - Silvina Arrossi
- Centro de Estudios de Estado y Sociedad (CEDES), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | | | | | - Alejandro Mohar
- Instituto Nacional de Cancerología, Instituto de Investigaciones Biomédicas (UNAM), Tlalpan, Mexico
| | - Raúl Murillo
- Centro Javeriano de Oncología, Hospital Universitario San Ignacio, Bogotá, Colombia
| | | | | | - Eduardo Cazap
- Sociedad Latinoamercia y del Caribe de Oncología Médica (SLACOM), Red de Institutos e Instituciones Nacionales de Cáncer (RINC-SLACOM), Buenos Aires, Argentina
| | - Owen O Gabriel
- Owen King EU Hospital, Department of Oncology, Saint Lucia
| | - Diego Paonessa
- Asociación Latina e Ibérica Contra el Cáncer (ALICC), Buenos Aires, Argentina
| | - J Walter Zoss
- Red de Institutos e Instituciones Nacionales de Cáncer (RINC-SLACOM), Rio de Janeiro, Brazil
| | - Silvana Luciani
- Pan American Health Organization (PAHO), Cancer Prevention and Control, Washington, DC 20037, United States
| | - Andre Carvalho
- International Agency for Research on Cancer (IARC/WHO), Environment and Lifestyle Epidemiology Branch, 25 avenue Tony Garnier CS 90627, 69366 CEDEX 07 Lyon, France
| | - Joachim Schüz
- International Agency for Research on Cancer (IARC/WHO), Environment and Lifestyle Epidemiology Branch, 25 avenue Tony Garnier CS 90627, 69366 CEDEX 07 Lyon, France
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In 't Veld M, Carnerero C, Massagué J, Alastuey A, de la Rosa JD, Sánchez de la Campa AM, Escudero M, Mantilla E, Gangoiti G, García-Pando CP, Olid M, Moreta JR, Hernández JL, Santamaría J, Millán M, Querol X. Understanding the local and remote source contributions to ambient O 3 during a pollution episode using a combination of experimental approaches in the Guadalquivir valley, southern Spain. Sci Total Environ 2021; 777:144579. [PMID: 33677295 DOI: 10.1016/j.scitotenv.2020.144579] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Revised: 12/10/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
The Guadalquivir Valley is one of three major O3 hotspots in Spain. An airborne and surface measurement campaign was carried out from July 9th to 11th, 2019 to quantify the local/regional O3 contributions using experimental approaches. Air quality and meteorology data from surface measurements, a microlight aircraft, a helium balloon, and remote sensing data (TROPOMI-NO2-ESA) were used to obtain the 3D distribution of O3 and various tracer pollutants. O3 accumulation over 2.5 days started with inputs from oceanic air masses transported inland by sea breezes, which drew O3 and its precursors from a local/regional origin to the northeastern end of the basin. The orographic-meteorological setting of the valley caused vertical recirculation of the air masses inside the valley that caused the accumulation by increasing regional background O3 concentration by 25-30 ppb. Furthermore, possible Mediterranean O3 contributions and additional vertical recirculation through the entrainment zone of the convective boundary layer also contributed. Using particulate matter finer than 2.5 μm (PM2.5), ultrafine particles (UFP), and black carbon (BC) as tracers of local sources, we calculated that local contributions increased regional O3 levels by 20 ppb inside specific pollution plumes transported by the breeze into the valley, and by 10 ppb during midday when flying over an area with abundant agricultural burning during the morning. Air masses that crossed the southern boundaries of the Betic system at mid-altitude (400-1850 m a.s.l.) on July 10th and 11th may have provided additional O3. Meanwhile, a decreasing trend at high altitudes (3000-5000 m a.s.l.) was observed, signifying that the impact of stratospheric O3 intrusion decreased during the campaign.
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Affiliation(s)
- M In 't Veld
- Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain; Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), Barcelona 08034, Spain.
| | - C Carnerero
- Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain; Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya (UPC), Barcelona 08034, Spain
| | - J Massagué
- Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain; Department of Mining, Industrial and ICT Engineering, Universitat Politècnica de Catalunya (UPC), Manresa, 08242, Spain
| | - A Alastuey
- Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain
| | - J D de la Rosa
- Department of Geology, University of Huelva, Huelva 21819, Spain
| | | | - M Escudero
- Centro Universitario de la Defensa, Academia General Militar, Zaragoza 50090, Spain
| | - E Mantilla
- Centro de Estudios Ambientales del Mediterráneo, CEAM, Valencia 46980, Spain
| | - G Gangoiti
- Department of Chemical and Environmental Engineering, University of Basque Country, Leioa 48940, Spain
| | - C Pérez García-Pando
- Catalan Institution for Research and Advanced Studies, ICREA, Barcelona 08010, Spain; Catalan Institution for Research and Advanced Studies, ICREA, Barcelona 08010, Spain
| | - M Olid
- Barcelona Supercomputing Center, BSC-CNS, Barcelona 08034, Spain
| | - J R Moreta
- Agencia Estatal de Meteorología, AEMET, Madrid 28071, Spain
| | - J L Hernández
- Agencia Estatal de Meteorología, AEMET, Madrid 28071, Spain
| | - J Santamaría
- Agencia Estatal de Meteorología, AEMET, Madrid 28071, Spain
| | - M Millán
- Centro de Estudios Ambientales del Mediterráneo, CEAM, Valencia 46980, Spain
| | - X Querol
- Institute of Environmental Assessment and Water Research, IDAEA-CSIC, Barcelona 08034, Spain
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Alzubaidi L, Zhang J, Humaidi AJ, Al-Dujaili A, Duan Y, Al-Shamma O, Santamaría J, Fadhel MA, Al-Amidie M, Farhan L. Review of deep learning: concepts, CNN architectures, challenges, applications, future directions. J Big Data 2021; 8:53. [PMID: 33816053 PMCID: PMC8010506 DOI: 10.1186/s40537-021-00444-8] [Citation(s) in RCA: 611] [Impact Index Per Article: 203.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 03/22/2021] [Indexed: 05/04/2023]
Abstract
In the last few years, the deep learning (DL) computing paradigm has been deemed the Gold Standard in the machine learning (ML) community. Moreover, it has gradually become the most widely used computational approach in the field of ML, thus achieving outstanding results on several complex cognitive tasks, matching or even beating those provided by human performance. One of the benefits of DL is the ability to learn massive amounts of data. The DL field has grown fast in the last few years and it has been extensively used to successfully address a wide range of traditional applications. More importantly, DL has outperformed well-known ML techniques in many domains, e.g., cybersecurity, natural language processing, bioinformatics, robotics and control, and medical information processing, among many others. Despite it has been contributed several works reviewing the State-of-the-Art on DL, all of them only tackled one aspect of the DL, which leads to an overall lack of knowledge about it. Therefore, in this contribution, we propose using a more holistic approach in order to provide a more suitable starting point from which to develop a full understanding of DL. Specifically, this review attempts to provide a more comprehensive survey of the most important aspects of DL and including those enhancements recently added to the field. In particular, this paper outlines the importance of DL, presents the types of DL techniques and networks. It then presents convolutional neural networks (CNNs) which the most utilized DL network type and describes the development of CNNs architectures together with their main features, e.g., starting with the AlexNet network and closing with the High-Resolution network (HR.Net). Finally, we further present the challenges and suggested solutions to help researchers understand the existing research gaps. It is followed by a list of the major DL applications. Computational tools including FPGA, GPU, and CPU are summarized along with a description of their influence on DL. The paper ends with the evolution matrix, benchmark datasets, and summary and conclusion.
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Affiliation(s)
- Laith Alzubaidi
- School of Computer Science, Queensland University of Technology, Brisbane, QLD 4000 Australia
- AlNidhal Campus, University of Information Technology & Communications, Baghdad, 10001 Iraq
| | - Jinglan Zhang
- School of Computer Science, Queensland University of Technology, Brisbane, QLD 4000 Australia
| | - Amjad J. Humaidi
- Control and Systems Engineering Department, University of Technology, Baghdad, 10001 Iraq
| | - Ayad Al-Dujaili
- Electrical Engineering Technical College, Middle Technical University, Baghdad, 10001 Iraq
| | - Ye Duan
- Faculty of Electrical Engineering & Computer Science, University of Missouri, Columbia, MO 65211 USA
| | - Omran Al-Shamma
- AlNidhal Campus, University of Information Technology & Communications, Baghdad, 10001 Iraq
| | - J. Santamaría
- Department of Computer Science, University of Jaén, 23071 Jaén, Spain
| | - Mohammed A. Fadhel
- College of Computer Science and Information Technology, University of Sumer, Thi Qar, 64005 Iraq
| | - Muthana Al-Amidie
- Faculty of Electrical Engineering & Computer Science, University of Missouri, Columbia, MO 65211 USA
| | - Laith Farhan
- School of Engineering, Manchester Metropolitan University, Manchester, M1 5GD UK
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Alzubaidi L, Al-Amidie M, Al-Asadi A, Humaidi AJ, Al-Shamma O, Fadhel MA, Zhang J, Santamaría J, Duan Y. Novel Transfer Learning Approach for Medical Imaging with Limited Labeled Data. Cancers (Basel) 2021; 13:1590. [PMID: 33808207 PMCID: PMC8036379 DOI: 10.3390/cancers13071590] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 03/24/2021] [Accepted: 03/27/2021] [Indexed: 12/27/2022] Open
Abstract
Deep learning requires a large amount of data to perform well. However, the field of medical image analysis suffers from a lack of sufficient data for training deep learning models. Moreover, medical images require manual labeling, usually provided by human annotators coming from various backgrounds. More importantly, the annotation process is time-consuming, expensive, and prone to errors. Transfer learning was introduced to reduce the need for the annotation process by transferring the deep learning models with knowledge from a previous task and then by fine-tuning them on a relatively small dataset of the current task. Most of the methods of medical image classification employ transfer learning from pretrained models, e.g., ImageNet, which has been proven to be ineffective. This is due to the mismatch in learned features between the natural image, e.g., ImageNet, and medical images. Additionally, it results in the utilization of deeply elaborated models. In this paper, we propose a novel transfer learning approach to overcome the previous drawbacks by means of training the deep learning model on large unlabeled medical image datasets and by next transferring the knowledge to train the deep learning model on the small amount of labeled medical images. Additionally, we propose a new deep convolutional neural network (DCNN) model that combines recent advancements in the field. We conducted several experiments on two challenging medical imaging scenarios dealing with skin and breast cancer classification tasks. According to the reported results, it has been empirically proven that the proposed approach can significantly improve the performance of both classification scenarios. In terms of skin cancer, the proposed model achieved an F1-score value of 89.09% when trained from scratch and 98.53% with the proposed approach. Secondly, it achieved an accuracy value of 85.29% and 97.51%, respectively, when trained from scratch and using the proposed approach in the case of the breast cancer scenario. Finally, we concluded that our method can possibly be applied to many medical imaging problems in which a substantial amount of unlabeled image data is available and the labeled image data is limited. Moreover, it can be utilized to improve the performance of medical imaging tasks in the same domain. To do so, we used the pretrained skin cancer model to train on feet skin to classify them into two classes-either normal or abnormal (diabetic foot ulcer (DFU)). It achieved an F1-score value of 86.0% when trained from scratch, 96.25% using transfer learning, and 99.25% using double-transfer learning.
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Affiliation(s)
- Laith Alzubaidi
- School of Computer Science, Queensland University of Technology, Brisbane, QLD 4000, Australia;
- AlNidhal Campus, University of Information Technology & Communications, Baghdad 10001, Iraq;
| | - Muthana Al-Amidie
- Faculty of Electrical Engineering & Computer Science, University of Missouri, Columbia, MO 65211, USA; (M.A.-A.); (A.A.-A.); (Y.D.)
| | - Ahmed Al-Asadi
- Faculty of Electrical Engineering & Computer Science, University of Missouri, Columbia, MO 65211, USA; (M.A.-A.); (A.A.-A.); (Y.D.)
| | - Amjad J. Humaidi
- Control and Systems Engineering Department, University of Technology, Baghdad 10001, Iraq;
| | - Omran Al-Shamma
- AlNidhal Campus, University of Information Technology & Communications, Baghdad 10001, Iraq;
| | - Mohammed A. Fadhel
- College of Computer Science and Information Technology, University of Sumer, Thi Qar 64005, Iraq;
| | - Jinglan Zhang
- School of Computer Science, Queensland University of Technology, Brisbane, QLD 4000, Australia;
| | - J. Santamaría
- Department of Computer Science, University of Jaén, 23071 Jaén, Spain;
| | - Ye Duan
- Faculty of Electrical Engineering & Computer Science, University of Missouri, Columbia, MO 65211, USA; (M.A.-A.); (A.A.-A.); (Y.D.)
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Pérez-Carbonell L, Gómez-Siurana E, Aguilar-Andújar M, Díaz-Román M, Fernández-Arcos A, Gaig C, García-Borreguero D, Gurtubay IG, Iznaola-Muñoz C, Larrosa O, Martínez-Martínez MA, Merino-Andréu M, Pérez-Díaz H, Poza-Aldea JJ, Pujol M, Sánchez-Barros C, Sans-Capdevila O, Sansa-Fayos G, Santamaría J, Iranzo A, En Representación Del Grupo de Trastornos de la Conducta Y Del Movimiento Durante El Sueño de la Sociedad Española de Sueño ERDGDTDLCYDMDESDLSEDS. [Sleep-related movement and behavioural disorders in adults]. Rev Neurol 2020; 71:377-386. [PMID: 33145749 DOI: 10.33588/rn.7110.2020365] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Sleep-related movement and behaviour disorders may have an impact on sleep quality and lead to daytime symptoms. These groups of conditions include diseases such as restless legs syndrome, periodic leg movements, and REM and NREM parasomnias. The knowledge of their clinical features and management is of utmost importance for the neurologist and sleep specialist. Frequently, these patients are referred to such specialists and it is relevant to know that certain sleep disorders may be associated with other neurological conditions.
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Affiliation(s)
| | | | | | - M Díaz-Román
- Hospital Lluís Alcanyís de Xàtiva, Valencia, España
| | | | - C Gaig
- Hospital Clínic de Barcelona, 08036 Barcelona, España
| | | | - I G Gurtubay
- Complejo Hospitalario de Navarra , Pamplona, España
| | - C Iznaola-Muñoz
- Hospital Universitario Virgen de las Nieves, 18013 Granada, España
| | - O Larrosa
- Hospital Quironsalud Sur de Alcorcón, Madrid, España
| | | | - M Merino-Andréu
- UAM. Universidad Autónoma de Madrid. Hospital Universitario La Paz, 28046 Madrid, España
| | | | | | - M Pujol
- Hospital Universitario de Santa María, Lleida, España
| | | | - O Sans-Capdevila
- Hospital Universitari Sant Joan de Déu, Esplugues de Llobregat, España
| | - G Sansa-Fayos
- Hospital de Sabadell. Corporació Sanitària Parc Taulí, 08208 Sabadell, España
| | - J Santamaría
- Hospital Clínic de Barcelona, 08036 Barcelona, España
| | - A Iranzo
- Hospital Clinic de Barcelona, Barcelona, España
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Almazán F, Urbiztondo MA, Serra-Crespo P, Seoane B, Gascon J, Santamaría J, Pina MP. Cu-BTC Functional Microdevices as Smart Tools for Capture and Preconcentration of Nerve Agents. ACS Appl Mater Interfaces 2020; 12:42622-42633. [PMID: 32568508 DOI: 10.1021/acsami.0c07364] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Cu-based metal-organic framework (MOF) microdevices are applied in sampling and preconcentration of nerve agents (NAs) diluted in gaseous streams. An in situ electrochemical-assisted synthesis of a Cu-benzene-1,3,5-tricarboxylate (BTC) thick film is carried out to functionalize a Cu-modified glass substrate. This simple, rapid, reproducible, and easy-to-integrate MOF synthesis approach enables the microfabrication of functional micro-preconcentrators with a large Brunauer-Emmett-Teller (BET) surface area (above 2000 cm2) and an active pore volume (above 90 nL) for the efficient adsorption of nerve agent molecules along the microfluidic channel 2.5 cm in length. The equilibrium adsorption capacity of the bulk material has been characterized through thermogravimetric analysis after exposure to controlled atmospheres of a sarin gas surrogate, dimethyl methylphosphonate (DMMP), in both dry and humid conditions (30% RH at 293 K). Breakthrough tests at the ppm level (162 mg/m3) reveal equilibrium adsorption capacities up to 691 mg/g. The preconcentration performance of such μ-devices when dealing with highly diluted surrogate atmosphere, i.e., 520 ppbV (2.6 mg/m3) at 298 K, leads to preconcentration coefficients up to 171 for sample volume up to 600 STP cm3. We demonstrate the potentialities of Cu-BTC micro-preconcentrators as smart first responder tools for "on-field" detection of nerve agents in the gas phase at relevant conditions.
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Affiliation(s)
- F Almazán
- Department of Chemical & Environmental Engineering, Univ. Zaragoza, Campus Rı́o Ebro, Zaragoza 50018, Spain
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - M A Urbiztondo
- Department of Chemical & Environmental Engineering, Univ. Zaragoza, Campus Rı́o Ebro, Zaragoza 50018, Spain
- Centro Universitario de la Defensa de Zaragoza, Carretera Huesca s/n, 50090 Zaragoza, Spain
| | - P Serra-Crespo
- Applied Radiation and Isotopes, Department of Radiation Science and Technology, Faculty of Applied Sciences, Technical University Delft, Mekelweg 15, 2629 JB Delft, the Netherlands
| | - B Seoane
- Catalysis Engineering, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - J Gascon
- Catalysis Engineering, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
- Advanced Catalytic Materials, KAUST Catalysis Center, King Abdullah University of Science and Technology, 23955 Thuwal, Saudi Arabia
| | - J Santamaría
- Department of Chemical & Environmental Engineering, Univ. Zaragoza, Campus Rı́o Ebro, Zaragoza 50018, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
| | - M P Pina
- Department of Chemical & Environmental Engineering, Univ. Zaragoza, Campus Rı́o Ebro, Zaragoza 50018, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza 50009, Spain
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8
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Rouco V, Hage RE, Sander A, Grandal J, Seurre K, Palermo X, Briatico J, Collin S, Trastoy J, Bouzehouane K, Buzdin AI, Singh G, Bergeal N, Feuillet-Palma C, Lesueur J, Leon C, Varela M, Santamaría J, Villegas JE. Quasiparticle tunnel electroresistance in superconducting junctions. Nat Commun 2020; 11:658. [PMID: 32005810 PMCID: PMC6994500 DOI: 10.1038/s41467-020-14379-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 12/30/2019] [Indexed: 11/13/2022] Open
Abstract
The term tunnel electroresistance (TER) denotes a fast, non-volatile, reversible resistance switching triggered by voltage pulses in ferroelectric tunnel junctions. It is explained by subtle mechanisms connected to the voltage-induced reversal of the ferroelectric polarization. Here we demonstrate that effects functionally indistinguishable from the TER can be produced in a simpler junction scheme—a direct contact between a metal and an oxide—through a different mechanism: a reversible redox reaction that modifies the oxide’s ground-state. This is shown in junctions based on a cuprate superconductor, whose ground-state is sensitive to the oxygen stoichiometry and can be tracked in operando via changes in the conductance spectra. Furthermore, we find that electrochemistry is the governing mechanism even if a ferroelectric is placed between the metal and the oxide. Finally, we extend the concept of electroresistance to the tunnelling of superconducting quasiparticles, for which the switching effects are much stronger than for normal electrons. Besides providing crucial understanding, our results provide a basis for non-volatile Josephson memory devices. The non-volatile switching of tunnel electroresistance in ferroelectric junctions provides the basis for memory and neuromorphic computing devices. Rouco et al. show tunnel electroresistance in superconductor-based junctions that arises from a redox rather than ferroelectric mechanism and is enhanced by superconductivity.
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Affiliation(s)
- V Rouco
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France.,Grupo de Física de Materiales Complejos, Dpto. Física de Materiales, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - R El Hage
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - A Sander
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - J Grandal
- Grupo de Física de Materiales Complejos, Dpto. Física de Materiales, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - K Seurre
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - X Palermo
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - J Briatico
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - S Collin
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - J Trastoy
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - K Bouzehouane
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France
| | - A I Buzdin
- Université de Bordeaux, LOMA UMR CNRS 5798, F-33405, Talence, France
| | - G Singh
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI Paris, Université PSL, CNRS, 75005, Paris, France
| | - N Bergeal
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI Paris, Université PSL, CNRS, 75005, Paris, France
| | - C Feuillet-Palma
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI Paris, Université PSL, CNRS, 75005, Paris, France
| | - J Lesueur
- Laboratoire de Physique et d'Etude des Matériaux, ESPCI Paris, Université PSL, CNRS, 75005, Paris, France
| | - C Leon
- Grupo de Física de Materiales Complejos, Dpto. Física de Materiales, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - M Varela
- Grupo de Física de Materiales Complejos, Dpto. Física de Materiales, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - J Santamaría
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France.,Grupo de Física de Materiales Complejos, Dpto. Física de Materiales, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Javier E Villegas
- Unité Mixte de Physique, CNRS, Thales, Université Paris-Saclay, 91767, Palaiseau, France.
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Cazap E, de Almeida LM, Arrossi S, García PJ, Garmendia ML, Gil E, Hassel T, Mayorga R, Mohar A, Murillo R, Owen GO, Paonessa D, Santamaría J, Tortolero-Luna G, Zoss W, Herrero R, Luciani S, Schüz J, Espina C. Latin America and the Caribbean Code Against Cancer: Developing Evidence-Based Recommendations to Reduce the Risk of Cancer in Latin America and the Caribbean. J Glob Oncol 2019; 5:1-3. [PMID: 31246551 PMCID: PMC6613664 DOI: 10.1200/jgo.19.00032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2019] [Indexed: 01/21/2023] Open
Affiliation(s)
- Eduardo Cazap
- Sociedad Latinoamericana y del Caribe de Oncología Médica, Buenos Aires, Argentina
| | - Liz Maria de Almeida
- Instituto Nacional de Câncer José Alencar Gomes da Silva, Rio de Janeiro, Brasil
| | - Silvina Arrossi
- Centro de Estudios de Estado y Sociedad, Buenos Aires, Argentina
| | | | - María Luisa Garmendia
- Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile, Santiago, Chile
| | - Enrique Gil
- Subregional Program for South America Pan-American Health Organization, Lima, Perú
| | - Trevor Hassel
- Healthy Caribbean Coalition, Caribbean Catalyst, St Michael, Barbados
| | - Rubén Mayorga
- Subregional Program for South America Pan-American Health Organization, Lima, Perú
| | - Alejandro Mohar
- Unidad de Investigación Biomédica, Instituto Nacional de Cancerología UNAM, Tlalpan, México
| | - Raúl Murillo
- Centro Javeriano de Oncología, Hospital Universitario San Ignacio, Bogotá, Colombia
| | - Gabriel O. Owen
- Healthy Caribbean Coalition, Caribbean Catalyst, St Michael, Barbados
| | - Diego Paonessa
- Liga Argentina de Lucha Contra el Cáncer, Buenos Aires, Argentina
| | | | | | - Walter Zoss
- Red de Institutos e Instituciones Nacionales de Cancer, Rio de Janeiro, Brasil
| | - Rolando Herrero
- Agencia Internacional para la Investigación del Cáncer, International Agency for Research on Cancer/WHO, Lyon, France
| | | | - Joachim Schüz
- Agencia Internacional para la Investigación del Cáncer, International Agency for Research on Cancer/WHO, Lyon, France
| | - Carolina Espina
- Agencia Internacional para la Investigación del Cáncer, International Agency for Research on Cancer/WHO, Lyon, France
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Gimeno M, Pinczowski P, Mendoza G, Vázquez F, Pérez M, Asín J, Santamaría J, Arruebo M, Luján L. Biocompatibility Studies of Local Antibiotic-eluting Devices for Orthopaedic Applications. J Comp Pathol 2017. [DOI: 10.1016/j.jcpa.2016.11.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
The appearance of chocolate is greatly affected by bloom, which occurs during storage under unfavourable conditions. This phenomenon develops due to different causes, such as poor tempering, addition of incompatible fats, incorrect cooling methods, warm or fluctuating storage temperature, etc. The effect of storage temperature (4, 20, 25 and 30°C) on gloss (60 and 85° angle) and colour (CIE L *a *b *) of dark chocolate bars was analysed throughout 30 days of storage. Three kinds of dark chocolate were studied: two from the same brand containing 99 and 70% cocoa, and a third one from another brand, containing 70% cocoa. Gloss change of chocolate throughout storage time followed a similar pattern in all cases: a decrease until an asymptotic value is reached, which is exacerbated at higher storage temperatures. The influence of temperature was related to the difference between storage temperature and the melting range of cocoa fat. Only when the visual fat bloom reaches a relevant level is the colour of the product affected. Changes in both optical parameters were highly-position dependant within the same sample.
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Affiliation(s)
| | - J. Santamaría
- Food Technology Department, Universidad Politécnica de Valencia, Camino de Vera s/n 46022, Valencia, Spain
| | - A. Chiralt
- Food Technology Department, Universidad Politécnica de Valencia, Camino de Vera s/n 46022, Valencia, Spain
| | - J. M. Aguilera
- Department of Chemical and Bioprocess Engineering, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, Santiago de Chile, Chile
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Arteagoitia MI, Barbier L, Santamaría J, Santamaría G, Ramos E. Efficacy of amoxicillin and amoxicillin/clavulanic acid in the prevention of infection and dry socket after third molar extraction. A systematic review and meta-analysis. Med Oral Patol Oral Cir Bucal 2016; 21:e494-504. [PMID: 26946211 PMCID: PMC4920465 DOI: 10.4317/medoral.21139] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Accepted: 12/02/2015] [Indexed: 11/22/2022] Open
Abstract
Background Prophylactic use of amoxicillin and amoxicillin/clavulanic acid, although controversial, is common in routine clinical practice in third molar surgery. Material and Methods Our objective was to assess the efficacy of prophylactic amoxicillin with or without clavulanic acid in reducing the incidence of dry socket and/or infection after third molar extraction. We conducted a systematic review and meta-analysis consulting electronic databases and references in retrieved articles. We included double-blind placebo-controlled randomized clinical trials published up to June 2015 investigating the efficacy of amoxicillin with or without clavulanic acid on the incidence of the aforementioned conditions after third molar extraction. Relative risks (RRs) were estimated with a generic inverse-variance approach and a random effect model using Stata/IC 13 and Review Manager Version 5.2. Stratified analysis was performed by antibiotic type. Results We included 10 papers in the qualitative review and in the quantitative synthesis (1997 extractions: 1072 in experimental groups and 925 in controls, with 27 and 74 events of dry socket and/or infection, respectively). The overall RR was 0.350 (p< 0.001; 95% CI 0.214 to 0.574). We found no evidence of heterogeneity (I2=0%, p=0.470). The number needed to treat was 18 (95% CI 13 to 29). Five studies reported adverse reactions (RR=1.188, 95% CI 0.658 to 2.146, p =0.567). The RRs were 0.563 for amoxicillin (95% CI 0.295 to 1.08, p=0.082) and 0.215 for amoxicillin/clavulanic acid (95% CI 0.117 to 0.395, p<0.001). Conclusions Prophylactic use of amoxicillin does not significantly reduce the risk of infection and/or dry socket after third molar extraction. With amoxicillin/clavulanic acid, the risk decreases significantly. Nevertheless, considering the number needed to treat, low prevalence of infection, potential adverse reactions to antibiotics and lack of serious complications in placebo groups, the routine prescription of amoxicillin with or without clavulanic acid is not justified. Key words:Meta-analysis, amoxicillin, infection, removal, dry socket, third molar.
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Affiliation(s)
- M-I Arteagoitia
- Servicio Cirugía Maxilofacial, Hospital Universitario de Cruces, Plaza de Cruces s/n, Barakaldo (Bizkaia), Spain,
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13
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Gimeno M, Pinczowski P, Vázquez F, Pérez M, Asín J, Santamaría J, Arruebo M, Luján L. Preventing Orthopaedic Implant-Associated Infections: the Sheep as an Animal Model. J Comp Pathol 2016. [DOI: 10.1016/j.jcpa.2015.10.045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Malumbres A, Martínez G, Hueso JL, Gracia J, Mallada R, Ibarra A, Santamaría J. Facile production of stable silicon nanoparticles: laser chemistry coupled to in situ stabilization via room temperature hydrosilylation. Nanoscale 2015; 7:8566-8573. [PMID: 25898392 DOI: 10.1039/c5nr01031d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Stable, alkyl-terminated, light-emitting silicon nanoparticles have been synthesized in a continuous process by laser pyrolysis of a liquid trialkyl-silane precursor selected as a safer alternative to gas silane (SiH4). Stabilization was achieved by in situ reaction using a liquid collection system instead of the usual solid state filtration. The alkene contained in the collection liquid (1-dodecene) reacted with the newly formed silicon nanoparticles in an unusual room-temperature hydrosilylation process. It was achieved by the presence of fluoride species, also produced during laser pyrolysis from the decomposition of sulfur hexafluoride (SF6) selected as a laser sensitizer. This process directly rendered alkyl-passivated silicon nanoparticles with consistent morphology and size (<3 nm), avoiding the use of costly post-synthetic treatments.
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Affiliation(s)
- A Malumbres
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 28029 Madrid, Spain
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15
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Bermejo E, Cordón O, Damas S, Santamaría J. A comparative study on the application of advanced bacterial foraging models to image registration. Inf Sci (N Y) 2015. [DOI: 10.1016/j.ins.2014.10.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Castrillón M, Mayoral A, Urtizberea A, Marquina C, Irusta S, Meier JG, Santamaría J. Synthesis and magnetic behavior of ultra-small bimetallic FeCo/graphite nanoparticles. Nanotechnology 2013; 24:505702. [PMID: 24270853 DOI: 10.1088/0957-4484/24/50/505702] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
FeCo-alloy graphite-coated nanoparticles with mean particle diameter under 8 nm have been synthesized following a CVD carbon-deficient method. The superior magnetic properties of FeCo-alloy nanoparticles makes them good candidates to be used as magnetic filler in magneto-polymer composites. Thanks to the protective effect of the graphite shell, FeCo nanoparticles are stable under oxygen atmosphere up to 200 ° C. The as-prepared nanoparticles presented a highly long range chemically ordered core being ferromagnetic at room temperature with a saturation magnetization at room temperature close to the bulk value. After annealing at 750 K the saturation magnetization and the coercive field increase. To investigate the processes involved in the thermal treatment, the temperature dependence of the magnetization and the particle composition, size and structure have been characterized before and after annealing. Besides powder x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS), a detailed study by means of advanced transmission electron microscopy (TEM) techniques has been carried out. In particular, aberration corrected scanning transmission electron microscopy (STEM), has shown that nanoparticles became faceted after the thermal treatment, as a mechanism to reach the thermodynamic equilibrium within the metastable phase. This outstanding feature, not previously reported, leads to an increase of the shape anisotropy, which in turn might be the origin of the observed increase of the coercive field after annealing.
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Affiliation(s)
- M Castrillón
- Technological Institute of Aragon (ITA), Maria de Luna 8, E-50018, Zaragoza, Spain
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18
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Martinez-Nicolas A, Guaita M, Santamaría J, Montserrat J, Madrid J, Rol A. Circadian impairment of the wrist temperature rhythm in patients with sleep disordered breathing. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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19
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Malumbres A, Martínez G, Mallada R, Hueso JL, Bomatí-Miguel O, Santamaría J. Continuous production of iron-based nanocrystals by laser pyrolysis. Effect of operating variables on size, composition and magnetic response. Nanotechnology 2013; 24:325603. [PMID: 23867323 DOI: 10.1088/0957-4484/24/32/325603] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Well dispersed iron-based magnetic nanoparticles have been prepared by gas phase laser-driven decomposition of iron pentacarbonyl. Agglomeration of the newly synthesized nanoparticles could be avoided by using a liquid collection system in which the exit stream from the laser reactor was bubbled through triethylene glycol (TREG). The effect of different experimental parameters (precursor concentration, laser power, working pressure, residence time) was studied and, by selecting the appropriate conditions, the size of the resulting magnetic nanocrystals could be tuned from ultrasmall (ca. 2.5 nm) to around 12 nm. For nanoparticle sizes around 10 nm and larger a metallic iron core could be preserved. These iron/iron oxide core-shell compositions exhibit very high values of magnetization, 127 emu g(-1).
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Affiliation(s)
- A Malumbres
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, E-50018-Zaragoza, Spain
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Sánchez-Santolino G, Tornos J, Bruno F, Cuellar F, Leon C, Santamaría J, Pennycook S, Varela M. Characterization of surface metallic states in SrTiO3 by means of aberration corrected electron microscopy. Ultramicroscopy 2013; 127:109-13. [DOI: 10.1016/j.ultramic.2012.07.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Martínez G, Malumbres A, Mallada R, Hueso JL, Irusta S, Bomatí-Miguel O, Santamaría J. Use of a polyol liquid collection medium to obtain ultrasmall magnetic nanoparticles by laser pyrolysis. Nanotechnology 2012; 23:425605. [PMID: 23037862 DOI: 10.1088/0957-4484/23/42/425605] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The present work addresses the main bottleneck in the synthesis of magnetic nanoparticles by laser pyrolysis. Since the introduction of laser pyrolysis for the production of nanoparticles nearly three decades ago, this method has been repeatedly presented as a highly promising alternative, on account of two main characteristics: (i) its flexibility, since nanoparticles can be formed from a wide variety of precursors in both gas and liquid phase, and (ii) its continuous nature, avoiding the intrinsic variability of batch processing. However, the results reported to date invariably show considerable aggregation of the obtained nanoparticles, which strongly limits their application in most fields. In this work, we have been able to circumvent this problem by collecting the particles in a polyol liquid medium. This method prevents the formation of aggregates and renders a uniform distribution of well dispersed ultrasmall nanoparticles (<4 nm) in a water-compatible solvent. We consider that the effectiveness of this novel collection method for the production of well-dispersed magnetic nanoparticles will be of high interest to a wide range of scientists working in the nanoparticle synthesis field and may enable new applications wherever there is a strict requirement for non-agglomerated nanoparticles.
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Affiliation(s)
- G Martínez
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 50018-Zaragoza, Spain.
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Urteaga P, Bou-Ali MM, Alonso de Mezquia D, Santamaría J, Santamaría C, Madariaga JA, Bataller H. Measurement of thermodiffusion coefficient of hydrocarbon binary mixtures under pressure with the thermogravitational technique. Rev Sci Instrum 2012; 83:074903. [PMID: 22852714 DOI: 10.1063/1.4737628] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
It was designed and constructed a new thermogravitational column able to operate at high pressures (up to 50 MPa). This new thermogravitational column is of the cylindrical type with closed ends. It is made of stainless steel. The length of the column is 0.5 m and the gap between its two walls is variable. First, the column was validated at atmospheric pressure by means of measurements of the thermodiffusion coefficient of well-known binary mixtures. Then, this new thermogravitational column was used to measure the thermodiffusion coefficient of the binary mixtures 1,2,3,4-tetrahydronaphtalene/isobutylbenzene, 1,2,3,4-tetrahydronaphtalene/n-dodecane, and isobutylbenzene/n-dodecane at high pressures and within the pressure range between 0.1 and 20 MPa at a mean temperature of 25 °C. We have found a linear dependence between the thermodiffusion coefficient and the pressure.
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Affiliation(s)
- P Urteaga
- Mechanical and Manufacturing Department, Engineering Faculty, Mondragon Unibertsitatea, Loramendi 4 Apdo. 20500 Mondragon, Spain
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Roca AG, Carmona D, Miguel-Sancho N, Bomatí-Miguel O, Balas F, Piquer C, Santamaría J. Surface functionalization for tailoring the aggregation and magnetic behaviour of silica-coated iron oxide nanostructures. Nanotechnology 2012; 23:155603. [PMID: 22456200 DOI: 10.1088/0957-4484/23/15/155603] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We report here a detailed structural and magnetic study of different silica nanocapsules containing uniform and highly crystalline maghemite nanoparticles. The magnetic phase consists of 5 nm triethylene glycol (TREG)- or dimercaptosuccinic acid (DMSA)-coated maghemite particles. TREG-coated nanoparticles were synthesized by thermal decomposition. In a second step, TREG ligands were exchanged by DMSA. After the ligand exchange, the ζ potential of the particles changed from -10 to -40 mV, whereas the hydrodynamic size remained constant at around 15 nm. Particles coated by TREG and DMSA were encapsulated in silica following a sol-gel procedure. The encapsulation of TREG-coated nanoparticles led to large magnetic aggregates, which were embedded in coalesced silica structures. However, DMSA-coated nanoparticles led to small magnetic clusters inserted in silica spheres of around 100 nm. The final nanostructures can be described as the result of several competing factors at play. Magnetic measurements indicate that in the TREG-coated nanoparticles the interparticle magnetic interaction scenario has not dramatically changed after the silica encapsulation, whereas in the DMSA-coated nanoparticles, the magnetic interactions were screened due to the function of the silica template. Moreover, the analysis of the AC susceptibility suggests that our systems essentially behave as cluster spin glass systems.
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Affiliation(s)
- A G Roca
- Instituto de Nanociencia de Aragón, Edificio I+D, E-50018 Zaragoza, Spain.
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Castrillón M, Mayoral A, Magén C, Meier JG, Marquina C, Irusta S, Santamaría J. Synthesis and characterization of ultra-small magnetic FeNi/G and NiCo/G nanoparticles. Nanotechnology 2012; 23:085601. [PMID: 22293364 DOI: 10.1088/0957-4484/23/8/085601] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Ultra-small magnetic nanoparticles consisting of NiCo and FeNi alloys enclosed within graphitic shells (NiCo/G and FeNi/G) have been synthesized. The particles, which retained the face centered cubic (fcc) symmetry of the original bulk metals, together with the graphitic coating were characterized by means of aberration corrected scanning transmission electron microscopy (STEM), obtaining mean particle sizes of 2.6 nm and 6.2 nm for NiCo/G and FeNi/G, respectively. Due to the enhancement of the thermal stability by the graphite shell, the graphite coated FeNi and NiCo were stable under oxygen atmosphere up to 170 °C. The effectiveness of the graphite shell was confirmed when unprotected bimetallic FeNi and NiCo were prepared and chemical characterization revealed that more than 60 at.% of the samples was oxygen due to the massive oxidation of the bimetallic nanoparticles.
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Affiliation(s)
- M Castrillón
- Technological Institute of Aragon (ITA), Maria de Luna 8, Zaragoza, Spain
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Brunsó J, Pijoan J, Jauregi M, Bidaguren A, Gasnault V, Santiago K, Margallo L, Andikoetxea B, Alvarez J, Martín J, Barbier L, Arteagoitia M, Santamaría G, Santamaría J. Length of superficial temporal artery biopsies and diagnostic sensitivity for giant cell arteritis. Int J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.ijom.2011.07.472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Galofré JC, Gómez-Sáez JM, Escola CA, Anda E, Calleja A, Donnay S, Lucas-Martin A, Menéndez-Torre E, Pereg V, Pérez-Corral B, Santamaría J, Riesco-Eizaguirre G, Zafon C. Treatment of thyroid cancer with the new oral agents. Ann Oncol 2011; 22:2343. [PMID: 21859897 DOI: 10.1093/annonc/mdr409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Moussaif N, Irusta S, Yagüe C, Arruebo M, Meier J, Crespo C, Jimenez M, Santamaría J. Mechanically reinforced biodegradable nanocomposites. A facile synthesis based on PEGylated silica nanoparticles. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.10.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pec MK, Reyes R, Sánchez E, Carballar D, Delgado A, Santamaría J, Arruebo M, Evora C. Reticulated vitreous carbon: a useful material for cell adhesion and tissue invasion. Eur Cell Mater 2010; 20:282-93; discussion 293-4. [PMID: 20927712 DOI: 10.22203/ecm.v020a23] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Diverse carbon materials have been used for tissue engineering and clinical implant applications with varying success. In this study, commercially available reticulated vitreous carbon (RVC) foams were tested in vitro and in vivo for compatibility with primary cell adhesion and tissue repair. Pores sizes were determined as 279 ± 98 μm. No hydroxyapatite deposition was detected after immersion of the foams in simulated body fluid. Nonetheless, RVC provided an excellent support for adhesion of mesenchymal stem cells (MSCs) as well as primary chondrocytes without any surface pre-treatment. Live cell quantification revealed neutral behaviour of the material with plastic adhered chondrocytes but moderate cytotoxicity with MSCs. Yet, rabbit implanted foams exhibited good integration in subcutaneous pockets and most importantly, total defect repair in bone. Probably due to the stiffness of the material, incompatibility with cartilage regeneration was found. Interestingly and in contrast to several other carbon materials, we observed a total lack of foreign body reactions. Our results and its outstanding porous interconnectivity and availability within a wide range of pore sizes convert RVC into an attractive candidate for tissue engineering applications in a variety of bone models and for ex vivo cell expansion for regenerative medical applications.
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Affiliation(s)
- M K Pec
- Department of Chemical Engineering and Pharmaceutical Technology, University of La Laguna, Av. Astrofísico Francisco Sánchez, s/n, E-38200 La Laguna, Santa Cruz de Tenerife, Spain.
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Pérez-Díaz H, Iranzo A, Santamaría J. [Zolpidem-induced sleep-related behavioural disorders]. Neurologia 2010; 25:491-497. [PMID: 20965000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
OBJECTIVE To present five patients with zolpidem-induced sleep-related behavioural disorders. METHODS Evaluation using a questionnaire designed to study sleep behaviours and past medical history in all patients. RESULTS The patients performed complex actions while sleep-walking (telephoning, house-cleaning, feeding the dog or waxing their legs). Inappropriate feeding behaviour with excessive food intake during the night were reported by all patients. All had weight gain, which in one patient led to extreme obesity. Two patients suffered injuries (knife cuts and burns) related to attempting to prepare food. One patient took a laxative. CONCLUSION Withdrawal of zolpidem resolved the behaviours in all cases, highlighting the importance of an adequate diagnosis of this side effect.
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Affiliation(s)
- H Pérez-Díaz
- Servicio de Neurologia y Unidad Multidisciplinar de Trastornos del Sueño, Hospital Clinico de Barcelona, Barcelona, Spain
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Pennycook SJ, Chisholm MF, Lupini AR, Varela M, Borisevich AY, Oxley MP, Luo WD, van Benthem K, Oh SH, Sales DL, Molina SI, García-Barriocanal J, Leon C, Santamaría J, Rashkeev SN, Pantelides ST. Aberration-corrected scanning transmission electron microscopy: from atomic imaging and analysis to solving energy problems. Philos Trans A Math Phys Eng Sci 2009; 367:3709-3733. [PMID: 19687062 DOI: 10.1098/rsta.2009.0112] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The new possibilities of aberration-corrected scanning transmission electron microscopy (STEM) extend far beyond the factor of 2 or more in lateral resolution that was the original motivation. The smaller probe also gives enhanced single atom sensitivity, both for imaging and for spectroscopy, enabling light elements to be detected in a Z-contrast image and giving much improved phase contrast imaging using the bright field detector with pixel-by-pixel correlation with the Z-contrast image. Furthermore, the increased probe-forming aperture brings significant depth sensitivity and the possibility of optical sectioning to extract information in three dimensions. This paper reviews these recent advances with reference to several applications of relevance to energy, the origin of the low-temperature catalytic activity of nanophase Au, the nucleation and growth of semiconducting nanowires, and the origin of the eight orders of magnitude increased ionic conductivity in oxide superlattices. Possible future directions of aberration-corrected STEM for solving energy problems are outlined.
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Affiliation(s)
- S J Pennycook
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
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Sebastian V, Irusta S, Mallada R, Santamaría J. Microreactors with Pt/zeolite catalytic films for the selective oxidation of CO in simulated reformer streams. Catal Today 2009. [DOI: 10.1016/j.cattod.2009.07.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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García-Barriocanal J, Rivera-Calzada A, Varela M, Sefrioui Z, Iborra E, Leon C, Pennycook SJ, Santamaría J. Response to Comment on “Colossal Ionic Conductivity at Interfaces of Epitaxial ZrO
2
:Y
2
O
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/SrTiO
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Heterostructures”. Science 2009; 324:465; author reply 465. [DOI: 10.1126/science.1169018] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- J. García-Barriocanal
- Grupo de Física de Materiales Complejos, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - A. Rivera-Calzada
- Grupo de Física de Materiales Complejos, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - M. Varela
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - Z. Sefrioui
- Grupo de Física de Materiales Complejos, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - E. Iborra
- Escuela Técnica Superior de Ingenieros de Telecomunicaciones, Universidad Politécnica de Madrid. Madrid 28040, Spain
| | - C. Leon
- Grupo de Física de Materiales Complejos, Universidad Complutense de Madrid, Madrid 28040, Spain
| | - S. J. Pennycook
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
| | - J. Santamaría
- Grupo de Física de Materiales Complejos, Universidad Complutense de Madrid, Madrid 28040, Spain
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Fernández CA, Puig-Domingo M, Lomeña F, Estorch M, Camacho Martí V, Bittini AL, Marazuela M, Santamaría J, Castro J, Martínez de Icaya P, Moraga I, Martín T, Megía A, Porta M, Mauricio D, Halperin I. Effectiveness of retinoic acid treatment for redifferentiation of thyroid cancer in relation to recovery of radioiodine uptake. J Endocrinol Invest 2009; 32:228-33. [PMID: 19542739 DOI: 10.1007/bf03346457] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Retinoic acid (RA) treatment has been used for redifferentiation of metastatic thyroid neoplasia that have lost radioiodine (131I) uptake with heterogeneous results. AIM Retrospective analysis of the recovery rate of 131I uptake after RA treatment in patients from 11 Spanish hospitals. METHODS Twenty-seven patients (14 men, 13 women) with papillary [21], follicular [4], and oncocytic [2] thyroid cancer initially treated with total thyroidectomy plus 131I, and with 131I negative metastatic disease, were given 13-cis RA (0.66-1.5 mg/kg for 5-12 weeks) followed by a therapeutic 131I dose (3700-7400 MBq); 3 months later thyroglobulin levels and computed tomography imaging were performed. RESULTS In 9 out 27 cases (33%) (8 papillary, 1 follicular) optimal positive 131I scan was observed after RA treatment; in the remaining 18, 10 had a suboptimal uptake (7 papillary, 2 follicular, 1 oncocytic) and in the rest there was no 131I uptake recovery (6 papillary, 1 follicular, 1 oncocytic). In 17 positive responses to RA (either optimal or suboptimal) in which image follow-up was available, decrease or stabilization of metastatic growth was observed in 7, while tumor mass increased at short term in the remaining 10. No major side effects were detected. CONCLUSION Quite a high rate of 131I uptake recovery after RA treatment may be obtained in advanced differentiated thyroid cancer, but the potential modification of the natural course of the disease is uncertain. A better biological characterization of these tumors allowing the identification of potential responders to RA may improve the outcome of RA coadjuvant therapy.
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Affiliation(s)
- C A Fernández
- Endocrinology Service, Barcelona Clinical Hospital, Barcelona, Spain
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Forcano L, Santamaría J, Mackintosh N, Chamizo V. Single landmark learning in rats: Sex differences in a navigation task. Learning and Motivation 2009. [DOI: 10.1016/j.lmot.2008.05.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Santamaría J, Cordón O, Damas S, García-Torres J, Quirin A. Performance evaluation of memetic approaches in 3D reconstruction of forensic objects. Soft comput 2008. [DOI: 10.1007/s00500-008-0351-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Quirin A, Cordón O, Santamaría J, Vargas-Quesada B, Moya-Anegón F. A new variant of the Pathfinder algorithm to generate large visual science maps in cubic time. Inf Process Manag 2008. [DOI: 10.1016/j.ipm.2007.09.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ulla M, Mallada R, Gutierrez L, Casado L, Bortolozzi J, Miró E, Santamaría J. Preparation and characterization of Co mordenite coatings onto cordierite monoliths as structured catalysts. Catal Today 2008. [DOI: 10.1016/j.cattod.2007.11.052] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kang Y, Kang W, Shin D, Chen J, Xiong J, Wang J, Lichinitser M, Philco M, Suarez T, Santamaría J. 3501 ORAL Capecitabine/cisplatin vs. continuous infusion of 5-FU/cisplatin as first-line therapy in patients (pts) with advanced gastric cancer (AGC): a randomised phase III trial. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71004-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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de la Iglesia O, Sebastián V, Mallada R, Nikolaidis G, Coronas J, Kolb G, Zapf R, Hessel V, Santamaría J. Preparation of Pt/ZSM-5 films on stainless steel microreactors. Catal Today 2007. [DOI: 10.1016/j.cattod.2007.03.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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de Vicente JC, Lequerica-Fernández P, Santamaría J, Fresno MF. Expression of MMP-7 and MT1-MMP in oral squamous cell carcinoma as predictive indicator for tumor invasion and prognosis. J Oral Pathol Med 2007; 36:415-24. [PMID: 17617835 DOI: 10.1111/j.1600-0714.2007.00546.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Squamous cell carcinoma of the oral cavity is a highly invasive neoplasm that spreads locally and metastasizes to regional lymph nodes. This process involves multiple proteolytic enzymes including matrilysin (MMP-7) and membrane type I-matrix metalloproteinase (MT1-MMP). This study was designed to explore the association between MMP-7 and MT1-MMP in the invasiveness and prognosis of oral squamous cell carcinoma (OSCC). METHODS About 4-microM, formalin-fixed, paraffin-embedded tissue sections from 69 patients with OSCC were immunohistochemically studied using specific antibodies against MMP-7 and MT1-MMP proteins. Immunostaining was semiquantitatively scored, and results were correlated with histologic and clinical variables including clinical behavior and survival. RESULTS MMP-7 was observed only in cancer cells, and MT1-MMP in both tumoral tissue and stroma. MMP-7 expression was significantly correlated with lymph node metastasis (P = 0.03; RR = 3.2). MT1-MMP showed a significant association with TIMP-2 (in N+ cases) and p53 expression (P = 0.01). MMP-7 and MT1-MMP displayed a survival relevance, and in multivariate analysis they were independent prognostic indicators, particularly in neck node-positive cases.
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Affiliation(s)
- J-C de Vicente
- Servicio de Cirugía Maxilofacial, Hospital Universitario Central de Asturias, Facultad de Medicina y Odontología, Instituto Universitario de Oncología del Principado de Asturias, Oviedo, Spain.
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Peña V, Nemes N, Visani C, Bruno F, Arias D, Sefrioui Z, Leon C, Te Velthuis S, Hoffmann A, Garcia-Hernandez M, Martinez J, Santamaría J. Spin dependent transport at oxide La0.7Ca0.3MnO3/YBa2Cu3O7 ferromagnet/superconductor interfaces. Ann Ital Chir 2007. [DOI: 10.1016/j.jeurceramsoc.2007.02.076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Hoffmann A, Nieva G, Guimpel J, Bruynseraede Y, Santamaría J, Lederman D, Schuller IK. Comment on "Photoemission study of YBa(2)Cu(3)O(y) thin films under light illumination". Phys Rev Lett 2006; 97:119701; author reply 119702. [PMID: 17025937 DOI: 10.1103/physrevlett.97.119701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2005] [Indexed: 05/12/2023]
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Dasí F, Martínez-Rodes P, March JA, Santamaría J, Martínez-Javaloyas JM, Gil M, Aliño SF. Real-Time Quantification of Human Telomerase Reverse Transcriptase mRNA in the Plasma of Patients with Prostate Cancer. Ann N Y Acad Sci 2006; 1075:204-10. [PMID: 17108213 DOI: 10.1196/annals.1368.028] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The aim of this study was to evaluate the potential diagnostic value of quantitative analysis of human telomerase reverse transcriptase (hTERT) mRNA in plasma for noninvasive diagnosis of prostate cancer (PCa). Expression levels of hTERT were analyzed by real-time quantitative RT-PCR in 68 patients showing elevated prostate-specific antigen (PSA) levels and a control group of 44 healthy volunteers. Sensitivity and specificity were determined and compared to the corresponding PSA values. Median values for hTERT gene expression in the PCa patients (0.72 ng; range 0.01-12.86) were statistically significantly higher (P < 0.001) than in the control group (0.13 ng; 0.02-0.35). Patients with clinically confirmed prostatitis showed lower plasma hTERT expression than PCa patients (0.29; 0.01-66.07). At a cutoff value of 0.35 sensitivity and specificity for the diagnosis of PCa were 81% and 60%, respectively. We suggest that hTERT mRNA in plasma is a very specific and sensitive method that may aid to differentiate between malignant and nonmalignant prostate tissue and may be a useful marker (in combination with PSA) for early PCa diagnosis.
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Affiliation(s)
- F Dasí
- University of Valencia School of Medicine, Department of Pharmacology, Avda. Blasco Ibañez 15, 46010-Valencia, Spain
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de la Iglesia O, Pedernera M, Mallada R, Lin Z, Rocha J, Coronas J, Santamaría J. Synthesis and characterization of MCM-48 tubular membranes. J Memb Sci 2006. [DOI: 10.1016/j.memsci.2006.03.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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León C, Lucía ML, Santamaría J. Analytical distributions of relaxation times for the description of electrical conductivity relaxation in ionic conductors. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/13642819708202344] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- C. León
- a Departamento de Física Aplicada III, Facultad de Ciencias Físicas , Universidad Complutense de Madrid , Avenida Complutense s/n, 28040 , Madrid , Spain
| | - M. L. Lucía
- a Departamento de Física Aplicada III, Facultad de Ciencias Físicas , Universidad Complutense de Madrid , Avenida Complutense s/n, 28040 , Madrid , Spain
| | - J. Santamaría
- a Departamento de Física Aplicada III, Facultad de Ciencias Físicas , Universidad Complutense de Madrid , Avenida Complutense s/n, 28040 , Madrid , Spain
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Iranzo A, Santamaría J, Rye DB, Valldeoriola F, Martí MJ, Muñoz E, Vilaseca I, Tolosa E. Characteristics of idiopathic REM sleep behavior disorder and that associated with MSA and PD. Neurology 2006; 65:247-52. [PMID: 16043794 DOI: 10.1212/01.wnl.0000168864.97813.e0] [Citation(s) in RCA: 263] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To compare the clinical and video-polysomnographic (VPSG) characteristics of idiopathic REM sleep behavior disorder (RBD) vs the RBD seen in multiple system atrophy (MSA) and Parkinson disease (PD). METHODS Clinical features and VPSG measures were evaluated in 110 consecutive nondemented subjects (26 MSA, 45 PD, and 39 idiopathic RBD) free of psychoactive medications referred for suspected RBD to our sleep unit over a 5-year period, with extended follow-up (mean 26.9 +/- 21.3 months). RESULTS Across the three groups studied, logistic regression analysis demonstrated that there were no differences in the quality of RBD symptoms (e.g., nature of unpleasant dream recall or behaviors witnessed by bed partners), most PSG variables, abnormal behaviors captured by VPSG, and clinical response to clonazepam. When compared to subjects with PD, however, patients with MSA had a significantly shorter duration of disease, a higher REM sleep without atonia percentage, a greater periodic leg movement index, and less total sleep time. Subjects with idiopathic RBD, as compared to those with either MSA or PD, were more often male, had greater self-reported clinical RBD severity, and were more often aware of their abnormal sleep behaviors. CONCLUSIONS REM sleep behavior disorder (RBD)-related symptoms and neurophysiologic features are qualitatively similar in RBD subjects with the idiopathic form, multiple system atrophy (MSA), and Parkinson disease (PD). Polysomnographic abnormalities associated with RBD in the setting of MSA are greater than in PD, suggesting a more severe dysfunction in the structures that modulate REM sleep.
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Affiliation(s)
- A Iranzo
- Neurology Service, ospital Clínic and Institut d'Investigació Biomèdiques August Pi i Sunyer, Barcelona, Spain.
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Quintana LF, Lladó A, Butjosa M, Santamaría J, Torras A, Poch E. [Baclofen-associated encephalopathy in a hemodialysis patient with hiccups]. Nefrologia 2006; 26:486-8. [PMID: 17058862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023] Open
Abstract
Baclofen is a centrally acting gamma-ammino butyric acid agonist that is used like muscular relaxant in disorders with spasticity and intractable hiccups. Although encouraging and safe results were provided 5 mg/day in hemodialysis patients, his pharmacokinetic and pharmacodinamic properties are not well known in end stage renal disease. We present here the case of a hemodialysis patient with intractable hiccups who developed baclofen-associated encephalopathy with this recommended dose.
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Affiliation(s)
- L F Quintana
- Servicio de Nefrología y Trasplante Renal, Hospital Clinic, Barcelona.
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