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González Y, Abelenda A, de Melo O, Calvo-Mola C, García-Pelayo L, García BJ, Sánchez M. Automated system for surface photovoltage spectroscopy. Rev Sci Instrum 2021; 92:013104. [PMID: 33514227 DOI: 10.1063/5.0035179] [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: 10/26/2020] [Accepted: 12/27/2020] [Indexed: 06/12/2023]
Abstract
This paper details the development of a lab-made experimental setup for surface photovoltage spectroscopy (SPS) measurements using an open-source and Arduino® microcontroller to control a monochromator and some off-the-shelf electronic components. The experimental setup is interfaced to a computer, where LabVIEW® based software manages system control and data acquisition. We also report the design of a compact sample holder, simple and easy to manufacture and handle. Results of the application of SPS to the characterization of MoO3 thin films and semiconductor laser structures are presented to validate the performance of the setup, highlighting the effectiveness of SPS for the characterization of semiconductor materials and devices.
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Affiliation(s)
- Y González
- Facultad de Física, Universidad de La Habana, San Lázaro y L, Vedado, 10400 La Habana, Cuba
| | - A Abelenda
- Facultad de Física, Universidad de La Habana, San Lázaro y L, Vedado, 10400 La Habana, Cuba
| | - O de Melo
- Facultad de Física, Universidad de La Habana, San Lázaro y L, Vedado, 10400 La Habana, Cuba
| | - C Calvo-Mola
- Facultad de Física, Universidad de La Habana, San Lázaro y L, Vedado, 10400 La Habana, Cuba
| | - L García-Pelayo
- Departamento de Física Aplicada, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - B J García
- Departamento de Física Aplicada, Universidad Autónoma de Madrid (UAM), 28049 Madrid, Spain
| | - M Sánchez
- Facultad de Física, Universidad de La Habana, San Lázaro y L, Vedado, 10400 La Habana, Cuba
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De Sedas A, González Y, Winter K, Lopez OR. Seedling responses to salinity of 26 Neotropical tree species. AoB Plants 2019; 11:plz062. [PMID: 31788179 PMCID: PMC6876892 DOI: 10.1093/aobpla/plz062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 08/16/2019] [Indexed: 05/31/2023]
Abstract
Sea-level rise will result in increased salinization of coastal areas. Soil salinity is a major abiotic stress that reduces plant growth, yet tolerance to salinity varies across environmental conditions, habitats and species. To determine salinity tolerance of 26 common tropical tree species from Panama, we measured growth, gas exchange and mortality of 3-month-old seedlings subjected to weekly irrigation treatments using five seawater solutions (0 % = control, 20, 40, 60 and 90 % V/V of seawater) for ~2 months. In general, species from coastal areas were more tolerant to increased seawater concentration than inland species. Coastal species such as Pithecellobium unguis-cati, Mora oleifera, Terminalia cattapa and Thespesia populnea maintained growth rates close to those of controls at 90 % seawater. In contrast, inland species such as Minquartia guainensis, Apeiba membranacea, Ormosia coccinea and Ochroma pyramidale showed strong reductions in growth rates and high mortality. Plant height and leaf production also differed greatly between the two groups of plants. Furthermore, measurements of gas exchange parameters, i.e. stomatal conductance and maximum photosynthetic rate, were consistent with the contrasting growth responses of coastal and inland species. Our research reveals a great degree of variation in salinity tolerance among tropical tree species and demonstrates a close relationship between species habitat and the ability to thrive under increasing salt concentration in the soil, with coastal species being better adapted to withstand increased soil salinity than non-costal species.
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Affiliation(s)
- A De Sedas
- Centro de Biodiversidad y Descubrimiento de Drogas, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Ciudad del Saber, Clayton, Panamá, República de Panamá
- Department of Biotechnology, Acharya Nagarjuna University, Guntur, Andhra Pradesh, India
| | - Y González
- Smithsonian Tropical Research Institute, Balboa, Ancón, Panamá, República de Panamá
| | - K Winter
- Smithsonian Tropical Research Institute, Balboa, Ancón, Panamá, República de Panamá
| | - O R Lopez
- Centro de Biodiversidad y Descubrimiento de Drogas, Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Ciudad del Saber, Clayton, Panamá, República de Panamá
- Smithsonian Tropical Research Institute, Balboa, Ancón, Panamá, República de Panamá
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de Melo O, González Y, Climent-Font A, Galán P, Ruediger A, Sánchez M, Calvo-Mola C, Santana G, Torres-Costa V. Optical and electrical properties of MoO 2 and MoO 3 thin films prepared from the chemically driven isothermal close space vapor transport technique. J Phys Condens Matter 2019; 31:295703. [PMID: 30978705 DOI: 10.1088/1361-648x/ab18e2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Chemically-driven isothermal close space vapour transport was used to prepare pure MoO2 thin films which were eventually converted to MoO3 by annealing in air. According to temperature-dependent Raman measurements, the MoO2/MoO3 phase transformation was found to occur in the 225 °C-350 °C range while no other phases were detected during the transition. A clear change in composition as well as noticeable modifications of the band gap and the absorption coefficient confirmed the conversion from MoO2 to MoO3. An extensive characterization of these two pure phases was carried out. In particular, a procedure was developed to determine the dispersion relation of the refractive index of MoO2 from the shift of the interference fringes of the used SiO2/Si substrate. The obtained data of the refractive index was corrected taking into account the porosity of the samples calculated from elastic backscattering spectrometry. The Debye temperature and the residual resistivity were extracted from the electrical resistivity temperature dependence using the Bloch-Grüneisen equation. MoO3 converted samples presented a very high resistivity and a typical semiconducting behavior. They also showed intense and broad luminescence spectra composed by several contributions whose temperature behavior was examined. Furthermore, surface photovoltage spectra were taken and their relation with the photoluminescence is discussed.
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Affiliation(s)
- O de Melo
- Physics Faculty, University of Havana, 10400 La Habana, Cuba. Departamento de Física Aplicada, Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain. Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Cd. Universitaria, A.P. 70-360, Coyoacán 04510, Mexico
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De Backer G, Jankowski P, Kotseva K, Mirrakhimov E, Reiner Ž, Rydén L, Tokgözoğlu L, Wood D, De Bacquer D, De Backer G, Jankowski P, Kotseva K, Mirrakhimov E, Reiner Z, Rydén L, Tokgözoğlu L, Wood D, De Bacquer D, Kotseva K, De Backer G, Abreu A, Aguiar C, Badariene J, Bruthans J, Castro Conde A, Cifkova R, Crowley J, Davletov K, Bacquer DD, De Smedt D, De Sutter J, Deckers J, Dilic M, Dolzhenko M, Druais H, Dzerve V, Erglis A, Fras Z, Gaita D, Gotcheva N, Grobbee D, Gyberg V, Hasan Ali H, Heuschmann P, Hoes A, Jankowski P, Lalic N, Lehto S, Lovic D, Maggioni A, Mancas S, Marques-Vidal P, Mellbin L, Miličić D, Mirrakhimov E, Oganov R, Pogosova N, Reiner Ž, Rydén L, Stagmo M, Störk S, Sundvall J, Tokgözoğlu L, Tsioufis K, Vulic D, Wood D, Wood D, Kotseva K, Jennings C, Adamska A, Adamska S, Rydén L, Mellbin L, Tuomilehto J, Schnell O, Druais H, Fiorucci E, Glemot M, Larras F, Missiamenou V, Maggioni A, Taylor C, Ferreira T, Lemaitre K, Bacquer DD, De Backer G, Raman L, Sundvall J, DeSmedt D, De Sutter J, Willems A, De Pauw M, Vervaet P, Bollen J, Dekimpe E, Mommen N, Van Genechten G, Dendale P, Bouvier C, Chenu P, Huyberechts D, Persu A, Dilic M, Begic A, Durak Nalbantic A, Dzubur A, Hadzibegic N, Iglica A, Kapidjic S, Osmanagic Bico A, Resic N, Sabanovic Bajramovic N, Zvizdic F, Vulic D, Kovacevic-Preradovic T, Popovic-Pejicic S, Djekic D, Gnjatic T, Knezevic T, Kovacevic-Preradovic T, Kos L, Popovic-Pejicic S, Stanetic B, Topic G, Gotcheva N, Georgiev B, Terziev A, Vladimirov G, Angelov A, Kanazirev B, Nikolaeva S, Tonkova D, Vetkova M, Milicic D, Reiner Ž, Bosnic A, Dubravcic M, Glavina M, Mance M, Pavasovic S, Samardzic J, Batinic T, Crljenko K, Delic-Brkljacic D, Dula K, Golubic K, Klobucar I, Kordic K, Kos N, Nedic M, Olujic D, Sedinic V, Blazevic T, Pasalic A, Percic M, Sikic J, Bruthans J, Cífková R, Hašplová K, Šulc P, Wohlfahrt P, Mayer O, Cvíčela M, Filipovský J, Gelžinský J, Hronová M, Hasan-Ali H, Bakery S, Mosad E, Hamed H, Ibrahim A, Elsharef M, Kholef E, Shehata A, Youssef M, Elhefny E, Farid H, Moustafa T, Sobieh M, Kabil H, Abdelmordy A, Lehto S, Kiljander E, Kiljander P, Koukkunen H, Mustonen J, Cremer C, Frantz S, Haupt A, Hofmann U, Ludwig K, Melnyk H, Noutsias M, Karmann W, Prondzinsky R, Herdeg C, Hövelborn T, Daaboul A, Geisler T, Keller T, Sauerbrunn D, Walz-Ayed M, Ertl G, Leyh R, Störk S, Heuschmann P, Ehlert T, Klocke B, Krapp J, Ludwig T, Käs J, Starke C, Ungethüm K, Wagner M, Wiedmann S, Tsioufis K, Tolis P, Vogiatzi G, Sanidas E, Tsakalis K, Kanakakis J, Koutsoukis A, Vasileiadis K, Zarifis J, Karvounis C, Crowley J, Gibson I, Houlihan A, Kelly C, O'Donnell M, Bennati M, Cosmi F, Mariottoni B, Morganti M, Cherubini A, Di Lenarda A, Radini D, Ramani F, Francese M, Gulizia M, Pericone D, Davletov K, Aigerim K, Zholdin B, Amirov B, Assembekov B, Chernokurova E, Ibragimova F, Kodasbayev A, Markova A, Mirrakhimov E, Asanbaev A, Toktomamatov U, Tursunbaev M, Zakirov U, Abilova S, Arapova R, Bektasheva E, Esenbekova J, Neronova K, Asanbaev A, Baigaziev K, Toktomamatov U, Zakirov U, Baitova G, Zheenbekov T, Erglis A, Andrejeva T, Bajare I, Kucika G, Labuce A, Putane L, Stabulniece M, Dzerve V, Klavins E, Sime I, Badariene J, Gedvilaite L, Pečiuraite D, Sileikienė V, Skiauteryte E, Solovjova S, Sidabraite R, Briedis K, Ceponiene I, Jurenas M, Kersulis J, Martinkute G, Vaitiekiene A, Vasiljevaite K, Veisaite R, Plisienė J, Šiurkaitė V, Vaičiulis Ž, Jankowski P, Czarnecka D, Kozieł P, Podolec P, Nessler J, Gomuła P, Mirek-Bryniarska E, Bogacki P, Wiśniewski A, Pająk A, Wolfshaut-Wolak R, Bućko J, Kamiński K, Łapińska M, Paniczko M, Raczkowski A, Sawicka E, Stachurska Z, Szpakowicz M, Musiał W, Dobrzycki S, Bychowski J, Kosior D, Krzykwa A, Setny M, Kosior D, Rak A, Gąsior Z, Haberka M, Gąsior Z, Haberka M, Szostak-Janiak K, Finik M, Liszka J, Botelho A, Cachulo M, Sousa J, Pais A, Aguiar C, Durazzo A, Matos D, Gouveia R, Rodrigues G, Strong C, Guerreiro R, Aguiar J, Abreu A, Cruz M, Daniel P, Morais L, Moreira R, Rosa S, Rodrigues I, Selas M, Gaita D, Mancas S, Apostu A, Cosor O, Gaita L, Giurgiu L, Hudrea C, Maximov D, Moldovan B, Mosteoru S, Pleava R, Ionescu M, Parepa I, Pogosova N, Arutyunov A, Ausheva A, Isakova S, Karpova A, Salbieva A, Sokolova O, Vasilevsky A, Pozdnyakov Y, Antropova O, Borisova L, Osipova I, Lovic D, Aleksic M, Crnokrak B, Djokic J, Hinic S, Vukasin T, Zdravkovic M, Lalic N, Jotic A, Lalic K, Lukic L, Milicic T, Macesic M, Stanarcic Gajovic J, Stoiljkovic M, Djordjevic D, Kostic S, Tasic I, Vukovic A, Fras Z, Jug B, Juhant A, Krt A, Kugonjič U, Chipayo Gonzales D, Gómez Barrado J, Kounka Z, Marcos Gómez G, Mogollón Jiménez M, Ortiz Cortés C, Perez Espejo P, Porras Ramos Y, Colman R, Delgado J, Otero E, Pérez A, Fernández-Olmo M, Torres-LLergo J, Vasco C, Barreñada E, Botas J, Campuzano R, González Y, Rodrigo M, de Pablo C, Velasco E, Hernández S, Lozano C, González P, Castro A, Dalmau R, Hernández D, Irazusta F, Vélez A, Vindel C, Gómez-Doblas J, García Ruíz V, Gómez L, Gómez García M, Jiménez-Navarro M, Molina Ramos A, Marzal D, Martínez G, Lavado R, Vidal A, Rydén L, Boström-Nilsson V, Kjellström B, Shahim B, Smetana S, Hansen O, Stensgaard-Nake E, Deckers J, Klijn A, Mangus T, Peters R, Scholte op Reimer W, Snaterse M, Aydoğdu S, Ç Erol, Otürk S, Tulunay Kaya C, Ahmetoğlu Y, Ergene O, Akdeniz B, Çırgamış D, Akkoyun H Kültürsay S, Kayıkçıoğlu M, Çatakoğlu A, Çengel A, Koçak A, Ağırbaşlı M, Açıksarı G, Çekin M, Tokgözoğlu L, Kaya E, Koçyiğit D, Öngen Z, Özmen E, Sansoy V, Kaya A, Oktay V, Temizhan A, Ünal S, İ Yakut, Kalkan A, Bozkurt E, Kasapkara H, Dolzhenko M, Faradzh C, Hrubyak L, Konoplianyk L, Kozhuharyova N, Lobach L, Nesukai V, Nudchenko O, Simagina T, Yakovenko L, Azarenko V, Potabashny V, Bazylevych A, Bazylevych M, Kaminska K, Panchenko L, Shershnyova O, Ovrakh T, Serik S, Kolesnik T, Kosova H, Wood D, Adamska A, Adamska S, Jennings C, Kotseva K, Hoye P Atkin A, Fellowes D, Lindsay S, Atkinson C, Kranilla C, Vinod M, Beerachee Y, Bennett C, Broome M, Bwalya A, Caygill L, Dinning L, Gillespie A, Goodfellow R, Guy J, Idress T, Mills C, Morgan C, Oustance N, Singh N, Yare M, Jagoda J, Bowyer H, Christenssen V, Groves A, Jan A, Riaz A, Gill M, Sewell T, Gorog D, Baker M, De Sousa P, Mazenenga T, Porter J, Haines F, Peachey T, Taaffe J, Wells K, Ripley D, Forward H, McKie H, Pick S, Thomas H, Batin P, Exley D, Rank T, Wright J, Kardos A, Sutherland SB, Wren L, Leeson P, Barker D, Moreby B, Sawyer J, Stirrup J, Brunton M, Brodison A, Craig J, Peters S, Kaprielian R, Bucaj A, Mahay K, Oblak M, Gale C, Pye M, McGill Y, Redfearn H, Fearnley M. Management of dyslipidaemia in patients with coronary heart disease: Results from the ESC-EORP EUROASPIRE V survey in 27 countries. Atherosclerosis 2019; 285:135-146. [DOI: 10.1016/j.atherosclerosis.2019.03.014] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/22/2019] [Accepted: 03/19/2019] [Indexed: 12/16/2022]
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González Mosquera D, Hernández Ortega Y, Fernández P, González Y, Doens D, Vander Heyden Y, Foubert K, Pieters L. Flavonoids fromBoldoa purpurascensinhibit proinflammatory cytokines (TNF-α and IL-6) and the expression of COX-2. Phytother Res 2018; 32:1750-1754. [DOI: 10.1002/ptr.6104] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 02/27/2018] [Accepted: 04/09/2018] [Indexed: 11/11/2022]
Affiliation(s)
| | - Y. Hernández Ortega
- Pharmacy Department; Central University “Marta Abreu of Las Villas”; Santa Clara Cuba
| | - P.L. Fernández
- Centro de Biología Celular y Molecular de Enfermedades; Instituto de Investigaciones Científicas y Servicios de Alta Tecnología; Panama City Panama
| | - Y. González
- Centro de Biología Celular y Molecular de Enfermedades; Instituto de Investigaciones Científicas y Servicios de Alta Tecnología; Panama City Panama
| | - D. Doens
- Centro de Biología Celular y Molecular de Enfermedades; Instituto de Investigaciones Científicas y Servicios de Alta Tecnología; Panama City Panama
| | - Y. Vander Heyden
- Department of Analytical Chemistry and Pharmaceutical Technology; Vrije Universiteit Brussel (VUB); Ixelles Belgium
| | - K. Foubert
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences; University of Antwerp; Antwerp Belgium
| | - L. Pieters
- Natural Products & Food Research and Analysis (NatuRA), Department of Pharmaceutical Sciences; University of Antwerp; Antwerp Belgium
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Affiliation(s)
- Y. González
- Departamento de Ciencias Biológicas, Sección de Ecología y Sistemática, Universidad Técnica Particular de Loja, San Cayetano Alto s/n, Loja, Ecuador
| | - G. Aragón
- Departamento de Biología, Geología, Física y Química Inorgánica, Área de Biodiversidad y Conservación ESCET, Universidad Rey Juan Carlos, Móstoles, E- 28933, Madrid, Spain
| | - A. Benítez
- Departamento de Ciencias Biológicas, Sección de Ecología y Sistemática, Universidad Técnica Particular de Loja, San Cayetano Alto s/n, Loja, Ecuador
| | - M. Prieto
- Departamento de Biología, Geología, Física y Química Inorgánica, Área de Biodiversidad y Conservación ESCET, Universidad Rey Juan Carlos, Móstoles, E- 28933, Madrid, Spain
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González Y, López A, Wilburn G, Escudero M. Granuloma de Majocchi. A propósito de un caso en atención primaria. Semergen 2016; 42:599-600. [DOI: 10.1016/j.semerg.2015.10.009] [Citation(s) in RCA: 2] [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] [Received: 10/04/2015] [Accepted: 10/11/2015] [Indexed: 11/28/2022]
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González Y, Mancebo A, Acosta E, Sosa I, León A, Blanco D, González C, Curbelo A, Prado P, Morgado L, Quesada R, Pérez A, Hugues B, Fuentes D, Samada I, Casacó A, Sánchez S, Contreras F, Contreras B, Ballart N, Valdés O, Lemus M, Estévez T, Jaime U, Díaz Y, Peña A, Ronda M, Pérez B, Escalona M, Mantilla N, Matos D. Toxicological safety evaluation of ACM T1H by intravenously route in CENP: Beagle dogs. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.623] [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: 11/30/2022]
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López AM, González Y, Benítez AM, Luis H. [Erythema nodosum of atypical location]. Semergen 2015; 42:268-9. [PMID: 26149061 DOI: 10.1016/j.semerg.2015.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 05/10/2015] [Accepted: 05/12/2015] [Indexed: 10/23/2022]
Affiliation(s)
- A M López
- Centro de Salud Reyes Magos, Servicio Madrileño de Salud, Área Este, Madrid, España
| | - Y González
- Centro de Salud Reyes Magos, Servicio Madrileño de Salud, Área Este, Madrid, España.
| | - A M Benítez
- Centro de Salud Reyes Magos, Servicio Madrileño de Salud, Área Este, Madrid, España
| | - H Luis
- Centro de Salud Reyes Magos, Servicio Madrileño de Salud, Área Este, Madrid, España
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González Y, Nieto F, Cerrolaza M. Modeling the nutrientsbehavior in intervertebral discs: a boundary integral simulation. Mol Cell Biomech 2013; 10:67-84. [PMID: 24010246] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
It is a well-known fact that computational biomechanics and mechanobiology have deserved great attention by the numerical-methods community. Many efforts and works can be found in technical literature. This work deals with the modeling of nutrients and their effects on the behavior of intervertebral discs. The numerical modeling was carried out using the Boundary ELement Method (BEM) and an axisymmetric model of the disc. Concentration and production of lactate and oxygen are modeled with the BEM. Results agree well enough with those obtained using finite elements. The numerical efforts in the domain and boundary discretizations are minimized using the BEM. Also, the effect of the calcification of the disc that causes the vascularization loss has been studied. The glucose, oxygen and lactate components behavior has been analyzed applying a mixed loading-unloading process, then allowing the study of the disc-height variations due to the degradation of the disc.
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Affiliation(s)
- Y González
- National Institute for Bioengineering, Central University of Venezuela, Caracas, Venezuela
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Mancebo A, Casacó A, Sánchez B, González B, Gómez D, León A, Bada A, Arteaga M, González Y, González C, Pupo M, Fuentes D. Repeated dose (14days) rat intramuscular toxicology study of Her1 vaccine. Regul Toxicol Pharmacol 2012; 64:425-34. [DOI: 10.1016/j.yrtph.2012.10.002] [Citation(s) in RCA: 5] [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] [Received: 06/14/2012] [Revised: 10/01/2012] [Accepted: 10/04/2012] [Indexed: 01/27/2023]
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del Barco S, Quer N, Guerra S, Bustins A, González Y. [Possible interaction between exemestane and clopidogrel]. Farm Hosp 2012; 36:550-551. [PMID: 23461453 DOI: 10.7399/fh.2012.36.6.41] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023] Open
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Mancebo A, Casacó A, González B, Ledón N, Sorlozabal J, León A, Gómez D, González Y, Bada A, González C, Arteaga M, Ramírez H, Fuentes D. Repeated dose intramuscular injection of the CIMAvax-EGF vaccine in Sprague Dawley rats induces local and systemic toxicity. Vaccine 2012; 30:3329-38. [DOI: 10.1016/j.vaccine.2012.01.092] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 01/06/2012] [Accepted: 01/07/2012] [Indexed: 10/28/2022]
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Paiva B, Pérez-Andrés M, Vídriales MB, Almeida J, de las Heras N, Mateos MV, López-Corral L, Gutiérrez NC, Blanco J, Oriol A, Hernández MT, de Arriba F, de Coca AG, Terol MJ, de la Rubia J, González Y, Martín A, Sureda A, Schmidt-Hieber M, Schmitz A, Johnsen HE, Lahuerta JJ, Bladé J, San-Miguel JF, Orfao A. Competition between clonal plasma cells and normal cells for potentially overlapping bone marrow niches is associated with a progressively altered cellular distribution in MGUS vs myeloma. Leukemia 2011; 25:697-706. [PMID: 21252988 DOI: 10.1038/leu.2010.320] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Disappearance of normal bone marrow (BM) plasma cells (PC) predicts malignant transformation of monoclonal gammopathy of undetermined significance (MGUS) and smoldering myeloma (SMM) into symptomatic multiple myeloma (MM). The homing, behavior and survival of normal PC, but also CD34(+) hematopoietic stem cells (HSC), B-cell precursors, and clonal PC largely depends on their interaction with stromal cell-derived factor-1 (SDF-1) expressing, potentially overlapping BM stromal cell niches. Here, we investigate the distribution, phenotypic characteristics and competitive migration capacity of these cell populations in patients with MGUS, SMM and MM vs healthy adults (HA) aged >60 years. Our results show that BM and peripheral blood (PB) clonal PC progressively increase from MGUS to MM, the latter showing a slightly more immature immunophenotype. Of note, such increased number of clonal PC is associated with progressive depletion of normal PC, B-cell precursors and CD34(+) HSC in the BM, also with a parallel increase in PB. In an ex vivo model, normal PC, B-cell precursors and CD34(+) HSC from MGUS and SMM, but not MM patients, were able to abrogate the migration of clonal PC into serial concentrations of SDF-1. Overall, our results show that progressive competition and replacement of normal BM cells by clonal PC is associated with more advanced disease in patients with MGUS, SMM and MM.
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Affiliation(s)
- B Paiva
- Servicio de Hematología, Hospital Universitario de Salamanca, Salamanca, Spain
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Freitez J, Galiasso R, González Y, Rodrı́guez J. Pyrolysis of Cracked Gasoline into Olefins: I. Design and Construction of a Cold Model for Circulating Type Reactor. Ind Eng Chem Res 2010. [DOI: 10.1021/ie100982q] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Freitez
- Universidad Nacional Experimental Politécnica “Antonio José de Sucre” Vicerrectorado Barquisimeto, Centro de Investigación de Procesos (CENIPRO), Barquisimeto, Venezuela
| | - R. Galiasso
- School of Chemical, Biological, and Materials Engineering, University of Oklahoma, Norman, Oklahoma 73109, United States
| | - Y. González
- Universidad Nacional Experimental Politécnica “Antonio José de Sucre” Vicerrectorado Barquisimeto, Centro de Investigación de Procesos (CENIPRO), Barquisimeto, Venezuela
| | - J. Rodrı́guez
- Universidad Nacional Experimental Politécnica “Antonio José de Sucre” Vicerrectorado Barquisimeto, Centro de Investigación de Procesos (CENIPRO), Barquisimeto, Venezuela
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Mancebo A, Molier T, González B, Lugo S, Riera L, Arteaga ME, Bada AM, González Y, Pupo M, Hernández Y, González C, Rojas NM, Rodríguez G. Acute oral, pulmonary and intravenous toxicity/pathogenicity testing of a new formulation of Bacillus thuringiensis var israelensis SH-14 in rats. Regul Toxicol Pharmacol 2010; 59:184-90. [PMID: 20946931 DOI: 10.1016/j.yrtph.2010.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Revised: 10/05/2010] [Accepted: 10/05/2010] [Indexed: 12/27/2022]
Abstract
During the last decades, efforts are being made to develop microbial insecticides as biological control agents. Bacillus thuringiensis has been one of the most consistent and significant biopesticides for using on crops as an insecticidal spray. The aim of this study was to assess and to compare the pathogenicity of a new formulation of B.thuringiensis var israelensis SH-14 in rats through oral, intranasal and intravenous single dosing. Through 21 days after administration, clinical examinations were performed daily, and body weight gain was evaluated. Clearance was estimated by means of collection of feces or examination of lungs and blood, and infectivity was evaluated enumerating microorganisms from organs of Bti SH-14 treated animals sacrificed at intervals. Gross necropsy of animals was performed at interim or final sacrifice. There were no treatment-related mortalities, and no evidence of pathogenicity or treatment related toxicity, although in the intravenous study, the microorganism was capable of achieving persistence in organs after administration, and the Bti SH-14 treated animals developed skin ulcerations and hemorrhages at the injection site. It could be concluded that the tested microorganism was not toxic or pathogenic to rats via oral or intranasal route, although it was capable of achieving persistence in organs after intravenous administration, eliciting local effects at the injection site.
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Affiliation(s)
- A Mancebo
- CETEX/CENPALAB, Bejucal, La Habana, Cuba.
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18
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Alonso-González P, González L, Martín-Sánchez J, González Y, Fuster D, Sales DL, Hernández-Maldonado D, Herrera M, Molina SI. Growth of Low-Density Vertical Quantum Dot Molecules with Control in Energy Emission. Nanoscale Res Lett 2010; 5:1913-6. [PMID: 21170396 PMCID: PMC2991188 DOI: 10.1007/s11671-010-9771-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2010] [Accepted: 08/18/2010] [Indexed: 05/30/2023]
Abstract
In this work, we present results on the formation of vertical molecule structures formed by two vertically aligned InAs quantum dots (QD) in which a deliberate control of energy emission is achieved. The emission energy of the first layer of QD forming the molecule can be tuned by the deposition of controlled amounts of InAs at a nanohole template formed by GaAs droplet epitaxy. The QD of the second layer are formed directly on top of the buried ones by a strain-driven process. In this way, either symmetric or asymmetric vertically coupled structures can be obtained. As a characteristic when using a droplet epitaxy patterning process, the density of quantum dot molecules finally obtained is low enough (2 × 10(8) cm(-2)) to permit their integration as active elements in advanced photonic devices where spectroscopic studies at the single nanostructure level are required.
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Affiliation(s)
- P Alonso-González
- Instituto de Microelectrónica de Madrid (IMM-CNM, CSIC), Isaac Newton, 8 Tres Cantos, 28760, Madrid, Spain
| | - L González
- Instituto de Microelectrónica de Madrid (IMM-CNM, CSIC), Isaac Newton, 8 Tres Cantos, 28760, Madrid, Spain
| | - J Martín-Sánchez
- Instituto de Microelectrónica de Madrid (IMM-CNM, CSIC), Isaac Newton, 8 Tres Cantos, 28760, Madrid, Spain
| | - Y González
- Instituto de Microelectrónica de Madrid (IMM-CNM, CSIC), Isaac Newton, 8 Tres Cantos, 28760, Madrid, Spain
| | - D Fuster
- UMDO (Unidad Asociada al CSIC-IMM), Instituto de Ciencia de Materiales, Universidad de Valencia, P.O. Box 22085, 4607, Valencia, Spain
| | - DL Sales
- Departamento de Ciencia de los Materiales e I.M. y Q.I, Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - D Hernández-Maldonado
- Departamento de Ciencia de los Materiales e I.M. y Q.I, Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - M Herrera
- Departamento de Ciencia de los Materiales e I.M. y Q.I, Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - SI Molina
- Departamento de Ciencia de los Materiales e I.M. y Q.I, Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
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Sales DL, Varela M, Pennycook SJ, Galindo PL, González L, González Y, Fuster D, Molina SI. Morphological evolution of InAs/InP quantum wires through aberration-corrected scanning transmission electron microscopy. Nanotechnology 2010; 21:325706. [PMID: 20647625 DOI: 10.1088/0957-4484/21/32/325706] [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] [Indexed: 05/29/2023]
Abstract
Evolution of the size, shape and composition of self-assembled InAs/InP quantum wires through the Stranski-Krastanov transition has been determined by aberration-corrected Z-contrast imaging. High resolution compositional maps of the wires in the initial, intermediate and final formation stages are presented. (001) is the main facet at their very initial stage of formation, which is gradually reduced in favour of [114] or [118], ending with the formation of mature quantum wires with {114} facets. Significant changes in wire dimensions are measured when varying slightly the amount of InAs deposited. These results are used as input parameters to build three-dimensional models that allow calculation of the strain energy during the quantum wire formation process. The observed morphological evolution is explained in terms of the calculated elastic energy changes at the growth front. Regions of the wetting layer close to the nanostructure perimeters have higher strain energy, causing migration of As atoms towards the quantum wire terraces, where the structure is partially relaxed; the thickness of the wetting layer is reduced in these zones and the island height increases until the (001) facet is removed.
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Affiliation(s)
- D L Sales
- Departamento de Ciencia de los Materiales e I M y Q I, Universidad de Cádiz, Puerto Real, Cádiz, Spain.
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Bada A, Santana J, González B, González Y, González C, Arteaga M, Gómez D, Mancebo A. Chronic oral toxicity of tannin powders obtained from bark of Pinus caribaea Morelet in rats. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.03.351] [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: 11/28/2022]
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Alén B, Fuster D, Fernández-Martínez I, Martínez-Pastor J, González Y, Briones F, González L. Electrical control of a laterally ordered InAs/InP quantum dash array. Nanotechnology 2009; 20:475202. [PMID: 19858562 DOI: 10.1088/0957-4484/20/47/475202] [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] [Indexed: 05/28/2023]
Abstract
We have fabricated an array of closely spaced quantum dashes starting from a planar array of self-assembled semiconductor quantum wires. The array is embedded in a metallic nanogap which we investigate by micro-photoluminescence as a function of a lateral electric field. We demonstrate that the net electric charge and emission energy of individual quantum dashes can be modified externally with the performance limited by the size inhomogeneity of the self-assembling process.
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Affiliation(s)
- B Alén
- IMM, Instituto de Microelectrónica de Madrid (CNM, CSIC), Isaac Newton 8, 28760 Tres Cantos, Madrid, Spain.
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22
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Molina S, Sales D, Galindo P, Fuster D, González Y, Alén B, González L, Varela M, Pennycook S. Erratum to: “Column-by-column compositional mapping by Z-contrast imaging” [Ultramicroscopy 109(2) (2009) 172–176]. Ultramicroscopy 2009. [DOI: 10.1016/j.ultramic.2009.06.008] [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: 10/20/2022]
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23
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Martín-Sánchez J, Muñoz-Matutano G, Herranz J, Canet-Ferrer J, Alén B, González Y, Alonso-González P, Fuster D, González L, Martínez-Pastor J, Briones F. Single photon emission from site-controlled InAs quantum dots grown on GaAs(001) patterned substrates. ACS Nano 2009; 3:1513-1517. [PMID: 19435304 DOI: 10.1021/nn9001566] [Citation(s) in RCA: 8] [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: 05/27/2023]
Abstract
We present a fabrication method to produce site-controlled and regularly spaced InAs/GaAs quantum dots for applications in quantum optical information devices. The high selectivity of our epitaxial regrowth procedure can be used to allocate the quantum dots only in positions predefined by ex-situ local oxidation atomic force nanolithography. The quantum dots obtained following this fabrication process present a high optical quality which we have evaluated by microphotoluminescence and photon correlation experiments.
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Affiliation(s)
- J Martín-Sánchez
- Instituto de Microelectronica de Madrid (CNM, CSIC), Isaac Newton 8, Tres Cantos, Madrid, Spain.
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Martín-Sánchez J, Alonso-González P, Herranz J, González Y, González L. Site-controlled lateral arrangements of InAs quantum dots grown on GaAs(001) patterned substrates by atomic force microscopy local oxidation nanolithography. Nanotechnology 2009; 20:125302. [PMID: 19420463 DOI: 10.1088/0957-4484/20/12/125302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this work, we present a fabrication process that combines atomic force microscopy (AFM) local oxidation nanolithography and molecular beam epitaxy (MBE) growth techniques in order to control both the nucleation site and number of InAs quantum dots (QDs) inside different motifs printed on GaAs(001) substrates. We find that the presence of B-type slopes (As terminated) inside the pattern motifs is the main parameter for controlling the selectivity of the pattern for InAs growth. We demonstrate that either single InAs QDs or multiple InAs QDs in a lateral arrangement (LQDAs) can be obtained, with a precise control in their position and QD number, simply by varying the fabricated oxide length along the [110] direction.
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Affiliation(s)
- J Martín-Sánchez
- Instituto de Microelectrónica de Madrid (CNM-CSIC), Tres Cantos, Madrid, Spain
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25
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Molina S, Sales D, Galindo P, Fuster D, González Y, Alén B, González L, Varela M, Pennycook S. Column-by-column compositional mapping by Z-contrast imaging. Ultramicroscopy 2009; 109:172-6. [DOI: 10.1016/j.ultramic.2008.10.008] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2007] [Revised: 06/30/2008] [Accepted: 10/07/2008] [Indexed: 11/24/2022]
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Ulloa JM, Koenraad PM, Fuster D, González L, González Y, González MU. Self-assembling processes involved in the molecular beam epitaxy growth of stacked InAs/InP quantum wires. Nanotechnology 2008; 19:445601. [PMID: 21832733 DOI: 10.1088/0957-4484/19/44/445601] [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] [Indexed: 05/31/2023]
Abstract
The growth mechanism of stacked InAs/InP(001) quantum wires (QWRs) is studied by combining an atomic-scale cross-sectional scanning tunnelling microscopy analysis with in situ and in real-time stress measurements along the [110] direction (sensitive to stress relaxation during QWR formation). QWRs in stacked layers grow by a non-Stranski-Krastanov (SK) process which involves the production of extra InAs by strain-enhanced As/P exchange and a strong strain driven mass transport. Despite the different growth mechanism of the QWR between the first and following layers of the stack, the QWRs maintain on average the same shape and composition in all the layers of the stack, revealing the high stability of this QWR configuration.
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Affiliation(s)
- J M Ulloa
- Department of Applied Physics, Eindhoven University of Technology, PO Box 513, NL-5600MB Eindhoven, The Netherlands
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Alén B, Fuster D, Muñoz-Matutano G, Martínez-Pastor J, González Y, Canet-Ferrer J, González L. Exciton gas compression and metallic condensation in a single semiconductor quantum wire. Phys Rev Lett 2008; 101:067405. [PMID: 18764504 DOI: 10.1103/physrevlett.101.067405] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2007] [Indexed: 05/26/2023]
Abstract
We study the metal-insulator transition in individual self-assembled quantum wires and report optical evidence of metallic liquid condensation at low temperatures. First, we observe that the temperature and power dependence of the single nanowire photoluminescence follow the evolution expected for an electron-hole liquid in one dimension. Second, we find novel spectral features that suggest that in this situation the expanding liquid condensate compresses the exciton gas in real space. Finally, we estimate the critical density and critical temperature of the phase transition diagram at n{c} approximately 1 x 10;{5} cm;{-1} and T{c} approximately 35 K, respectively.
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Affiliation(s)
- B Alén
- IMM, Instituto de Microelectrónica de Madrid (CNM, CSIC), Isaac Newton 8, 28760 Tres Cantos, Madrid, Spain.
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Molina SI, Ben T, Sales DL, Pizarro J, Galindo PL, Varela M, Pennycook SJ, Fuster D, González Y, González L. Determination of the strain generated in InAs/InP quantum wires: prediction of nucleation sites. Nanotechnology 2006; 17:5652-5658. [PMID: 21727338 DOI: 10.1088/0957-4484/17/22/020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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
The compositional distribution in a self-assembled InAs(P) quantum wire grown by molecular beam epitaxy on an InP(001) substrate has been determined by electron energy loss spectrum imaging. We have determined the strain and stress fields generated in and around this wire capped with a 5 nm InP layer by finite element calculations using as input the compositional map experimentally obtained. Preferential sites for nucleation of wires grown on the surface of this InP capping layer are predicted, based on chemical potential minimization, from the determined strain and stress fields on this surface. The determined preferential sites for wire nucleation agree with their experimentally measured locations. The method used in this paper, which combines electron energy loss spectroscopy, high-resolution Z contrast imaging, and elastic theory finite element calculations, is believed to be a valuable technique of wide applicability for predicting the preferential nucleation sites of epitaxial self-assembled nano-objects.
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Affiliation(s)
- S I Molina
- Departamento de Ciencia de los Materiales e I.M. y Q.I., Facultad de Ciencias, Universidad de Cádiz, Campus Río San Pedro, s/n, 11510 Puerto Real, Cádiz, Spain. Condensed Matter Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
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Puértolas JA, Castro M, De La Fuente MR, Pérez Jubindo MA, Dreyfus H, Guillon D, González Y. Thermal Study of an Antiferroelectric Liquid Crystal. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259608038744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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)
- J. A. Puértolas
- a Dpto. Ciencia de Materiales. Centro Politécnico Superior-ICMA. Universidad deZaragoza-C.S.I.C. , 50015 , ZARAGOZA , Spain
| | - M. Castro
- a Dpto. Ciencia de Materiales. Centro Politécnico Superior-ICMA. Universidad deZaragoza-C.S.I.C. , 50015 , ZARAGOZA , Spain
| | - M. R. De La Fuente
- b Dpto. Fisica Aplicada II. Facultad de Ciencias. Universidad del Pais Vasco , 48080 , BILBAO , Spain
| | - M. A. Pérez Jubindo
- b Dpto. Fisica Aplicada II. Facultad de Ciencias. Universidad del Pais Vasco , 48080 , BILBAO , Spain
| | - H. Dreyfus
- c Institut de Physique et Chimie des Matériaux de Strasbourg , CNRS-UL P-EHICS., 67037 , Strasbourg-Cedex , France
| | - D. Guillon
- c Institut de Physique et Chimie des Matériaux de Strasbourg , CNRS-UL P-EHICS., 67037 , Strasbourg-Cedex , France
| | - Y. González
- d Dpto. Química Organica. Facultad de Ciencias-ICMA Universidad de Zaragoza-CSIC , 50009 , ZARAGOZA , Spain
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Baly L, Quesada I, Otazo M, Ramos M, González Y. Influence of non-uniformity of the stimulation source on quartz OSL signals. RADIAT MEAS 2006. [DOI: 10.1016/j.radmeas.2006.05.002] [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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31
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Montes de Oca M, Torres S, González Y, Romero E, Hernández N, Tálamo C. Cambios en la tolerancia al ejercicio, calidad de vida relacionada con la salud y características de los músculos periféricos después de 6 semanas de entrenamiento en pacientes con EPOC. Arch Bronconeumol 2005. [DOI: 10.1157/13077951] [Citation(s) in RCA: 22] [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: 11/21/2022]
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Montes de Oca M, Torres SH, González Y, Romero E, Hernández N, Tálamo C. Changes in Exercise Tolerance, Health Related Quality of Life, and Peripheral Muscle Characteristics of Chronic Obstructive Pulmonary Disease Patients After 6 Weeks' Training. ACTA ACUST UNITED AC 2005; 41:413-8. [PMID: 16117945 DOI: 10.1016/s1579-2129(06)60255-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 10/24/2022]
Abstract
OBJECTIVE This study was designed to assess changes in skeletal muscle characteristics after 6 weeks' high-intensity physical training of patients with moderate to severe chronic obstructive pulmonary disease (COPD) and to determine how the changes were related to improvements in exercise tolerance and health related quality of life (HRQL). PATIENTS AND METHODS Ten patients with a mean (SD) age of 60 (10) years and a forced expiratory volume in 1 second of 32% (9%) were enrolled. The effect of training on the 6-minute walk test, HRQL questionnaires, and skeletal muscles was examined for the 8 patients who completed the program. The structural and chemical characteristics of skeletal muscles before and after training were studied in vastus lateralis muscle biopsies. RESULTS Training significantly modified the 6-minute walk test (P<.01), HRQL (P<.05), and citrate synthetase activity (P<.05). Changes in distances walked during the 6-minute walk test were significantly related to changes in the mean area of fibers (r=0.81). CONCLUSIONS The results of this study indicate that 6 weeks of high-intensity physical training of COPD patients produces moderate changes in skeletal muscles which could partly explain improvements observed in exercise tolerance after respiratory rehabilitation.
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Affiliation(s)
- M Montes de Oca
- Servicio de Neumonología, Hospital Universitario de Caracas, Universidad Central de Venezuela, Venezuela.
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González Y, Araujo MS, Oliva MLV, Sampaio CAM, Chávez MA. Purification and preliminary characterization of a plasma kallikrein inhibitor isolated from sea hares Aplysia dactylomela Rang, 1828. Toxicon 2004; 43:219-23. [PMID: 15019482 DOI: 10.1016/j.toxicon.2003.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2003] [Accepted: 11/10/2003] [Indexed: 11/21/2022]
Abstract
An inhibitor active against pancreatic trypsin was found in the crude extract from the sea hares Aplysia dactylomelaRang, 1828. A stronger inhibitory activity against human plasma kallikrein was detectable after treating this extract at 60 degrees C, for 30 min. The plasma kallikrein inhibitor (AdKI) purification was achieved by acetone fractionation (80%) v/v, ion-exchange chromatography on Mono Q column and gel filtration chromatography on Superdex 75 column (FPLC system). By the latter a molecular mass of 2900 Da was estimated. The purified inhibitor strongly inhibits human plasma kallikrein with a K(i) value of 2.2 x 10(-10)M, while human plasmin and pancreatic trypsin were inhibited with K(i) values of 1.8 x 10(-9) and 4.7 x 10(-9)M, respectively. Chymotrypsin, pancreatic elastase, pancreatic kallikrein and thrombin are not inhibited. The effect of AdKI on plasma kallikrein was confirmed by the prolongation of activated partial thromboplastin time, using a clotting time assay. The inhibitor did not affect prothrombin time or thrombin time. AdKi is a more specific inhibitor than other serine proteinase inhibitors from marine invertebrates.
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Affiliation(s)
- Y González
- Facultad de Biología, Centro de Estudio de las Proteínas, Universidad de la Habana, Ciudad de La Habana,
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González Y, Ibarra N, Gómez H, González M, Dorta L, Padilla S, Valdés R. Expanded bed adsorption processing of mammalian cell culture fluid: comparison with packed bed affinity chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 784:183-7. [PMID: 12504196 DOI: 10.1016/s1570-0232(02)00712-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [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: 10/27/2022]
Abstract
A comparison between expanded bed adsorption and conventional packed bed Protein A Fast Flow to purify the anti-rHBsAg mAbs from feedstock is presented in this work. Direct capture by STREAMLINE expanded bed adsorption chromatography resulted in 92% product recovery and sevenfold more concentrated product with similar purity levels compared to that obtained by the standard packed method. The process time and buffer consumption were reduced in the expanded bed adsorption method not only with the binding-elution conditions but also with the use of NaOH during the cleaning-in-place step. The latter is the most widely accepted agent in downstream processing, being a cost effective technique that provides not only efficient cleaning but also sanitizes complete column systems and destroys pirogens.
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Affiliation(s)
- Y González
- Monoclonal Antibodies Department, Center for Genetic Engineering and Biotechnology, P.O. Box 6162, 10600, Havana, Cuba
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Redondo-Cerezo E, Cabello MJ, González Y, Gómez M, García-Montero M, de Teresa J. Eosinophilic gastroenteritis: our recent experience: one-year experience of atypical onset of an uncommon disease. Scand J Gastroenterol 2001; 36:1358-60. [PMID: 11761030 DOI: 10.1080/003655201317097254] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [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: 02/04/2023]
Abstract
Eosinophilic gastroenteritis is an unusual entity that is rarely found in daily clinical practise. Its aetiology is unknown and diagnosis can be made microscopically with evidence of massive eosinophilic infiltration in patients with chronic gastrointestinal symptoms, excluding entities that may cause such findings (parasitic infestation, medical therapy, inflammatory bowel disease, and so on). Allergic processes are usually associated and these normally respond well to steroids. We present our last year's experience of four women with eosinophilic gastroenteritis with an extraordinary atypical clinical onset. Two of the women presented with an acute abdomen and two with isolated colonic involvement. The management of acute abdomen avoiding surgery and a complete response with azathioprine are the outstanding variables that make our recent cases of special interest. Demographic variables were similar to others reported from our medium, with the exception of a higher incidence of women. Our cases suggest the wide spectrum of clinical presentations and show the high suspicion index needed for a diagnosis that is made by pathologists.
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Affiliation(s)
- E Redondo-Cerezo
- Servicio de Aparato Digestivo, Hospital Universitario Virgen de las Nieves, Granada, Spain.
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Perea G, Sureda A, Martino R, Altés A, Martínez C, Cabezudo E, Amill B, Martín-Henao GA, González Y, Muñoz L, Peyret M, Brunet S, Sierra J. Predictive factors for a successful mobilization of peripheral blood CD34+ cells in multiple myeloma. Ann Hematol 2001; 80:592-7. [PMID: 11732870 DOI: 10.1007/s002770100351] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.1] [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: 11/25/2022]
Abstract
We analyzed the prognostic factors for a successful mobilization and peripheral blood stem cell collection in a series of 57 consecutive patients with multiple myeloma (MM); a new scoring system to predict an adequate mobilization in this subset of patients was also constructed. A total of 221 aphereses were performed in 57 patients with MM. The median time from diagnosis to mobilization was 12 months (range 4-120). Only one line of chemotherapy was administered before mobilization to 36 patients and two or more to 21. The median number of alkylating chemotherapy cycles was 6 (2-33). Two patients were mobilized in complete remission, 32 in partial response, and 23 in stable/progressive disease. Significant adverse prognostic factors for collecting 2.5 x 10(6) CD34+cells/kg or more were: a period of at least 12 months from diagnosis, at least six cycles of alkylating agents, and a plasma cell infiltration of 20% or more prior to mobilization. Patients with three risk factors had a probability of only 0.38 (95% CI 0.3-0.9) for adequate mobilization. Ten patients failed to mobilize; a period from diagnosis of 12 months or more and female sex were unfavorable factors. Patients with two risk factors had a probability of 0.50 (95% CI 0.2-0.8) for failing the mobilization procedure. These findings indicate that MM patients must be mobilized early in the course of the disease, with minimal disease burden before severe hematopoietic progenitor cell injury due to cumulative therapy.
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Affiliation(s)
- G Perea
- Clinical Hematology Division and Blood Bank, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
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González Y, Martino R, Rabella N, Labeaga R, Badell I, Sierra J. Community respiratory virus infections in patients with hematologic malignancies. Haematologica 1999; 84:820-3. [PMID: 10477456] [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: 02/13/2023] Open
Abstract
BACKGROUND AND OBJECTIVE The main difficulty of PCR-based clonality studies for B-cell lymphoproliferative disorders (B-LPD) is discrimination between monoclonal and polyclonal PCR products, especially when there is a high background of polyclonal B cells in the tumor sample. Actually, PCR-based methods for clonality assessment require additional analysis of the PCR products in order to discern between monoclonal and polyclonal samples. Heteroduplex analysis represents an attractive approach since it is easy to perform and avoids the use of radioactive substrates or expensive equipment. DESIGN AND METHODS We studied the sensitivity and specificity of heteroduplex PCR analysis for monoclonal detection in samples from 90 B-cell non Hodgkin's lymphoma (B-NHL) patients and in 28 individuals without neoplastic B-cell disorders (negative controls). Furthermore, in 42 B-NHL and in the same 28 negative controls, we compared heteroduplex analysis vs the classical PCR technique. We also compared ethidium bromide (EtBr) vs. silver nitrate (AgNO(3)) staining as well as agarose vs. polyacrylamide gel electrophoresis (PAGE). RESULTS Using two pair consensus primers sited at VH (FR3 and FR2) and at JH, 91% of B-NHL samples displayed monoclonal products after heteroduplex PCR analysis using PAGE and AgNO(3) staining. Moreover, no polyclonal sample showed a monoclonal PCR product. By contrast, false positive results were obtained when using agarose (5/28) and PAGE without heteroduplex analysis: 2/28 and 8/28 with EtBr and AgNO(3) staining, respectively. In addition, false negative results only appeared with EtBr staining: 13/42 in agarose, 4/42 in PAGE without heteroduplex analysis and 7/42 in PAGE after heteroduplex analysis. INTERPRETATION AND CONCLUSIONS We conclude that AgNO(3) stained PAGE after heteroduplex analysis is the most suitable strategy for detecting monoclonal rearrangements in B-NHL samples because it does not produce false-positive results and the risk of false-negative results is very low.
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Affiliation(s)
- Y González
- Service of Hematology, University Hospital of Salamanca, Paseo de San Vicente, 58-182, Salamanca, 37007, Spain.
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Girón MD, Salto R, González Y, Girón JA, Nieto N, Periago JL, Suárez MD, Hortelano P. Modulation of hepatic and intestinal glutathione S-transferases and other antioxidant enzymes by dietary lipids in streptozotocin diabetic rats. Chemosphere 1999; 38:3003-3013. [PMID: 10230044 DOI: 10.1016/s0045-6535(98)00502-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Antioxidant enzymes in liver and small intestine were investigated using control and streptozotocin diabetic rats fed diets with 5% olive, sunflower or fish oil for five weeks. In liver, Glutathione Peroxidase and Superoxide Dismutase decreased and in intestine Glutathione-S-transferase (GST) increased by diabetes. In isolated jejunum and ileum, this increase in GST activity was due to an increase in GST-alpha and -mu isoenzymes in jejunum and GST-alpha, mu and -pi in ileum. Since GST plays an important role in protecting tissues from oxidative damage, our results highlight the role of the intestine against free radicals in physiological or pathological situations.
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Affiliation(s)
- M D Girón
- Department of Biochemistry and Molecular Biology, School of Pharmacy, University of Granada, Spain.
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Abstract
In recent years, it has been recognised that the community respiratory viruses are a frequent cause of upper and lower respiratory tract infections in immunocompromised hosts such as bone marrow transplant recipients. By contrast, infections by non-polio enteroviruses have rarely been reported after stem cell transplantation. We present four cases of acute respiratory illness with enterovirus isolated as the sole pathogen from bronchoalveolar lavage. All four patients developed pneumonia and three died of progressive pneumonia, which reflects the severity of this complication. We conclude that enteroviral pulmonary infections may be a cause of severe pneumonia in immunocompromised hosts.
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Affiliation(s)
- Y González
- Clinical Hematology Division, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
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González Y, Souto JC, Mateo J, Córdoba A, Blanco-Vaca F, Fontcuberta J. Moderate hyperhomocysteinemia is a highly prevalent defect in Spanish patients with venous thromboembolic disease. Haematologica 1998; 83:1126-7. [PMID: 9949633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
Abstract
Recent studies suggest that mild hyperhomocysteinemia may be a risk factor for venous thromboembolic disease (VTED). In this work we evaluated the prevalence of moderate hyperhomocysteinemia in patients with VTED in our area. We found hyperhomocysteinemia in 23.4% of 64 patients studied compared with 7.35% of 68 healthy controls (p = 0.014). Our results suggest that moderate hyperhomocysteinemia is one of the most prevalent abnormalities associated with VTED.
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González G, Crombet T, Catalá M, Mirabal V, Hernández JC, González Y, Marinello P, Guillén G, Lage A. A novel cancer vaccine composed of human-recombinant epidermal growth factor linked to a carrier protein: report of a pilot clinical trial. Ann Oncol 1998; 9:431-5. [PMID: 9636835 DOI: 10.1023/a:1008261031034] [Citation(s) in RCA: 122] [Impact Index Per Article: 4.7] [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: 02/07/2023] Open
Abstract
BACKGROUND There is evidence of a relationship between epidermal growth factor (EGF) and tumor cell proliferation, such as the overexpression of EGF receptor (EGF-R) in different human tumors, which makes this system an interesting target for cancer treatment. Up to now, passive immunotherapy with monoclonal antibodies against the EGF-R has been assayed in clinics. Our approach consists of active immunotherapy with human EGF (hu-EGF). We conducted a pilot clinical trial to define the safety, toxicity and immunogenicity of vaccination with hu-EGF coupled to a carrier protein. PATIENTS AND METHODS Ten patients with histologically-proven malignant carcinomas (colon, lung, stomach and prostate) in advanced clinical stages were enrolled. Patients were immunized twice (on days 0 and 15) with hu-EGF linked to either tetanic toxoid (TT, five patients) or P64K Neisseria Meningitidis recombinant protein (P64k, five patients), intradermically, using aluminium hydroxyde as adjuvant. RESULTS In both groups 60% of patients developed anti-EGF antibody titers without evidence of toxicity. Secondary reactions were very mild, limited to erythema and itching at the site of injection, which disappeared without medication. CONCLUSIONS We conclude that the proposed vaccination with hu-EGF was well tolerated and that antibody titers against self EGF were developed. The results of this trial may be useful in the design of new clinical trials with higher dose immunization protocols and using more effective adjuvants.
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Affiliation(s)
- G González
- Center of Molecular Immunology, Havana, Cuba.
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Abstract
We report a case of simultaneous diagnosis of chronic lymphocytic leukemia (CLL) and acute myeloid leukemia (AML), in which the use of flow cytometry analysis allowed the demonstration of two different cell populations and the study of both immunophenotyping patterns with a large panel of monoclonal antibodies (MoAbs). CLL cells showed a typical immunophenotype with coexpression of B cell markers with CD5, CD23, CD43, and weak surface immunoglobulin light chain restriction expression, whereas the AML population had a very uncommon phenotype with expression of myeloid markers and CD56 and lack of expression of other natural killer (NK) antigens, CD34 and HLA-DR. After chemotherapeutic treatment of AML with two induction courses, the patient achieved complete remission of the AML with persistence of a CD19/CD5 positive population. After consolidation chemotherapy, this latter population was no longer detectable despite the presence of lymphoid nodules in a bone marrow biopsy. Six months after diagnosis, the patient relapsed with AML and died shortly afterwards.
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MESH Headings
- Antibodies, Monoclonal/analysis
- Antigens, CD/analysis
- Biomarkers, Tumor/analysis
- Bone Marrow/pathology
- Fatal Outcome
- Flow Cytometry
- Humans
- Immunophenotyping
- Leukemia, Lymphocytic, Chronic, B-Cell/complications
- Leukemia, Lymphocytic, Chronic, B-Cell/immunology
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Leukemia, Myeloid, Acute/complications
- Leukemia, Myeloid, Acute/immunology
- Leukemia, Myeloid, Acute/pathology
- Male
- Middle Aged
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Affiliation(s)
- R Mateu
- Departament d'Hematologia, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain
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Delfín J, Martínez I, Antuch W, Morera V, González Y, Rodríguez R, Márquez M, Saroyán A, Larionova N, Díaz J, Padrón G, Chávez M. Purification, characterization and immobilization of proteinase inhibitors from Stichodactyla helianthus. Toxicon 1996; 34:1367-76. [PMID: 9027993 DOI: 10.1016/s0041-0101(96)00114-6] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.6] [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: 02/03/2023]
Abstract
Isolation of proteinase inhibitors from the sea anemone Stichodactyla helianthus was achieved by trichloroacetic acid treatment of the aqueous extract followed by affinity chromatography on trypsin-Sepharose and ion-exchange chromatography on CM-cellulose. The average molecular mass of the major inhibitor (ShPI-I) obtained by fast atom bombardment mass spectrometry (FAB-MS) was 6110.6 Da. The amino acid sequence was determined by FAB-MS combined with manual Edman degradation, digestions with endopeptidases and exopeptidases and automatic sequencing. The sequence of ShPI-I (55 amino acids) was compared with those reported in the SwissProt database for several proteinase inhibitors and significant similarity to inhibitors belonging to the Kunitz family was observed. ShPI-I exhibits a broad specificity for serine, cysteine and aspartic proteinases. The dissociation constants of the complexes formed with different enzymes were determined. The affinity-purified fraction (PI) was immobilized on Sepharose and used in the purification of different classes of proteinases.
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Affiliation(s)
- J Delfín
- Facultad de Biologia, Universidad de la Habana, Cuba
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Merino S, González Y, Ros B, Puértolas JA. Broadband dielectric measurements on the (R)-1-methylheptyl-6-(4'-decyloxybenzoyloxy)-2-naphthalene carboxylate antiferroelectric liquid crystal. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1996; 54:5169-5177. [PMID: 9965697 DOI: 10.1103/physreve.54.5169] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Delfin J, Díaz J, Antuch W, Rodríguez R, González Y, Morera V, Martínez I, Larionova N, Padrón G, Chávez M. Purification, characterization and immobilization of proteinase inhibitors from Stichodactyla helianthus. Toxicon 1996. [DOI: 10.1016/0041-0101(96)80902-0] [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: 10/16/2022]
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González Y, Palacios B, Serrano JL. Dielectric relaxation study in a glassy low-molecular-weight ferroelectric liquid crystal. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1995; 52:R5764-R5767. [PMID: 9964226 DOI: 10.1103/physreve.52.r5764] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Vilà A, Cornet A, Morante JR, Loubradou M, Bonnet R, González Y, González L, Ruterana P. Atomic core structure of Lomer dislocation at GaAs/(001)Si interface. ACTA ACUST UNITED AC 1995. [DOI: 10.1080/01418619508242957] [Citation(s) in RCA: 41] [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: 10/23/2022]
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Jars-Guincestre MC, Chevret S, Raphael JC, Chastang C, Nicolas F, Latour J, Bonastre J, Giner JS, López-Camps V, Rodríguez-Serra M, Rosado L, Jones C, Palmer TEA, Griffiths RD, Losser MR, Lenfant F, Teisseire B, Payen D, Sarmiento X, Soler M, Toboso JM, Guardiola JJ, Alonso S, Gener J, Tomasa A, Ponte C, Alonso MA, Florez P, Alonso R, Fernandez I, Giribet A, Vallina JM, Ruiz J, García L, González Y, Boix A, Solsona JF, Díaz-Prieto A, Vázquez-Sánchez A, Garrido S, Nolla J, Alvarez F, Vázquez-Sánchez A, Díaz-Prieto A, Masdeu G, Adrario E, Valente M, Luzi A, Giovannini C, Pietropaoli P, Vicens-Justo A, Zavala E, Bertrán A, López-Boado MA, Fernández-Cruz L. ICU organization and management I. Intensive Care Med 1992. [DOI: 10.1007/bf03216353] [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: 10/18/2022]
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Báez Martínez JM, Pérez Avila J, Valdés Martínez S, Pascual Gispert J, González Y. [Cerebral cysticercosis in a 3-year-old child treated with praziquantel]. Rev Cubana Med Trop 1987; 39:87-91. [PMID: 3313572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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