Browsing by Subject "Biophysics"

Now showing items 1-18 of 18

    • Action potential propagation: ion current or intramembrane electric field? 

      Martí Cabarrocas, Albert; Pérez González, Juan Jesús; Madrenas Boadas, Jordi (2018-01-22)
      Article
      Open Access
      The established action potential propagation mechanisms do not satisfactorily explain propagation on myelinated axons given the current knowledge of biological channels and membranes. The flow across ion channels presents ...

    • Analysis of homestatic regulation in cardiac cells 

      Conesa Ortega, David (Universitat Politècnica de Catalunya, 2018-06)
      Bachelor thesis
      Open Access
      Calcium ions play a leading role in heart contraction. Heart beats at a pace given by the sinoatrial node where an action potential is generated, then propagated to the rest of cardiac cells. Contractile force depends on ...

    • Cell Magnetic tweezers for the study of mechanical interactions in Cells 

      Cabedo Gómez, Aina (Universitat Politècnica de Catalunya, 2016-06-30)
      Bachelor thesis
      Open Access
      Covenantee:   King's College London
      In this project, a cell Magnetic Tweezer (MT) set-up was assembled and calibrated, aimed at the study of mechanical interactions in single cells. The set-up is able to apply forces of ranging from 0.2 to 0.5 nN and is ...

    • Development of a simulator to evaluate public health control strategies of tuberculosis in big cities 

      Gilabert Navarro, Joan Francesc (Universitat Politècnica de Catalunya, 2015-06)
      Bachelor thesis
      Open Access
      Tuberculosis is still one of the most important infectious diseases worldwide, killing over 1.5 million people each year. It is estimated that one third of world population has already been infected by Mycobacterium ...

    • Dynamics of an inchworm nano-walker 

      Ciudad Álvarez, Aleix; Sancho, Jose Maria; Lacasta Palacio, Ana María (Elsevier Science, 2006-05-19)
      Article
      Open Access
      An inchworm processive mechanism is proposed to explain the motion of dimeric molecular motors such as kinesin.We present here preliminary results for this mechanism focusing on observables like mean velocity, coupling ...

    • Efectos de los soportes plantares sobre la termorregulación de las plantas de los pies durante la carrera 

      Gil-Calvo, M.; Universitat de València; Priego Quesada, J.I.; Lucas-Cuevas, A.G.; Jiménez-Pérez, I.; Aparicio, I.; Giménez, J.V.; Macián-Romero, C.; Llana-Belloch, S.; Pérez-Soriano, P. (Sociedad Ibérica de Biomecánica y Biomateriales, 2015)
      Article / Article
      Open Access
      Existe una gran controversia acerca de si el uso de soportes plantares puede reducir el riesgo de padecer lesiones por sobreuso en corredores. Se ha observado una relación entre las cargas plantares y la temperatura ...

    • Electromagnetic characterization of living action potential 

      Requena Pozo, Borja (Universitat Politècnica de Catalunya, 2017-05)
      Bachelor thesis
      Open Access
      Brain imaging is a vanguard and promising topic with uncountable applications in several fields. This project is driven by the development of a new brain imaging technique that could provide activity information with spatial ...

    • Metabolic Cost of Traverses on Future Planetary Extra Vehicular Activities 

      Sainz Ubide, Víctor (Universitat Politècnica de Catalunya, 2020-06-29)
      Bachelor thesis
      Open Access
      Covenantee:   Texas A&M University. Department of Aerospace Engineering
      La despesa energètica per metabolisme (Metabolic Rate, MR) és una magnitud fonamental en els passejos espacials. La predicció de la despesa energètica durant una travessia futura en condicions específiques de velocitat, ...

    • Microchannel enhanced neuron-computer interface: design, fabrication, biophysics of signal generation, signal strength optimization, and its applications to ion-channel screening and basic neuroscience research 

      Wang, Ling (Universitat Politècnica de Catalunya, 2011-12-15)
      Doctoral thesis
      Open Access
      En el presente trabajo, utilizamos técnicas de microfabricación, simulaciones numéricas, experimentos de electrofisiología para explorar la viabilidad en me- jorar la interface ordenador-neurona a través de microcanales, ...

    • Microfluidic point-of-care blood panel based on a novel technique: Reversible electroosmotic flow 

      Mohammadi, Mahdi; Madadi, Hojjat; Casals Terré, Jasmina (2015-09-11)
      Article
      Open Access
      A wide range of diseases and conditions are monitored or diagnosed from blood plasma, but the ability to analyze a whole blood sample with the requirements for a point-of-care device, such as robustness, user-friendliness, ...

    • Modelos físicos de actividad cerebral: de la micro- a la macro-escala 

      Pons Rivero, Antonio Javier; García Ojalvo, Jordi (2012-09-01)
      Article
      Restricted access - publisher's policy

    • New indices for quantification of the power spectrum of heart rate variability time series without the need of any frequency band definition 

      Ramos Castro, Juan José; Padullés, M.; Marina, M.; Bescós, R.; Iglesias, X.; Rodriguez, F. A.; García González, Miguel Ángel; Fernández Chimeno, Mireya; Ferrer, J.; Escorihuela, R.M.; Parrado Romero, Eva; Capdevila, L.; Benitez, A.; Angulo, R. (IOP PUBLISHING LTD, 2011-06-07)
      Article
      Restricted access - publisher's policy
      This paper presents a new family of indices for the frequency domain analysis of heart rate variability time series that do not need any frequency band definition. After proper detrending of the time series, a cumulated ...

    • Physical analysis of a processive molecular motor: the conventional kinesin 

      Ciudad Álvarez, Aleix; Lacasta Palacio, Ana María; Sancho, Jose Maria (American Physical Society, 2005-09-29)
      Article
      Open Access
      We present a model that allows for the derivation of the experimentally accesible observables: spatial steps, mean velocity, stall force, useful power, efficiency and randomness, etc. as a function of the adenosine triphosphate ...

    • Planar and cylindrical active microwave temperature imaging... 

      Rius Casals, Juan Manuel; Jofre Roca, Lluís; Broquetas Ibars, Antoni (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1992-12-02)
      Article
      Open Access
      A comparative study at 2.45 GHz concerning both measurement and reconstruction parameters for planar and cylindrical configurations is presented. For the sake of comparison, a numerical model consisting of two nonconcentric ...

    • PLANT: A Method for Detecting Changes of Slope in Noisy Trajectories 

      Sosa-Costa, Alberto; Piechocka, Izabela K.; Gardini, Lucia; Pavone, Francesco S.; Capitanio, Marco; Garcia-Parajo, Maria F.; Manzo, Carlo (ScienceDirect, 2018-05-08)
      Article
      Open Access
      Time traces obtained from a variety of biophysical experiments contain valuable information on underlying processes occurring at the molecular level. Accurate quantification of these data can help explain the details of ...

    • Poly-L/DL-lactic acid films functionalized with collagen IV as carrier substrata for corneal epithelial stem cells 

      de la Mata Sampedro, Ana; Mateos Timoneda, Miguel Ángel; Nieto Miguel, Teresa; Galindo de la Rosa, Sara; López Paniagua, Marina; Planell Estany, Josep Anton; Engel López, Elisabeth; Calonge Cano, Margarita (2019-05-01)
      Article
      Open Access
      Limbal epithelial stem cells (LESCs) are responsible for the renewal of corneal epithelium. Cultivated limbal epithelial transplantation is the current treatment of choice for restoring the loss or dysfunction of LESCs. ...

    • The atomic structure of prilocaine in solution 

      Silva Santisteban López, Alvaro (Universitat Politècnica de Catalunya, 2016-06-28)
      Bachelor thesis
      Open Access
      Covenantee:   University of Oxford
      Prilocaine is an aminoamide local anesthetic (LA). LAs are known to act on functional proteins as well as mediating membrane structure in order to induce anesthetic action, however there is no consensus as to which molecular ...

    • The Membrane proximal domain of TRPV1 and TRPV2 channels mediates protein-protein interactions and lipid binding in vitro 

      Doñate Macián, Pau; Álvarez Marimon, Elena; Sepulcre Sánchez, Francesc; Vázquez Ibar, José Luis; Peralvarez Marin, Alex (2019-02-05)
      Article
      Open Access
      Constitutive or regulated membrane protein trafficking is a key cell biology process.Transient receptor potential channels are somatosensory proteins in charge of detecting severalphysical and chemical stimuli, ...