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Showing 1 to 20 of 84 for “"active transport"”.
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Scale-adaptive analysis of active transport
… as the statistical tool to separate motor-driven active motion and passive Brownian diffusion in intracellular active transport is developed. It is validated by comparison with three existing methods, as well as by manual inspection. The method makes no assumption about the nature of the transport …
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Active Transport in Chaotic Rayleigh-Bénard Convection
The transport of a species in complex flow fields is an important phenomenon related to many areas in science and engineering. There has been significant progress theoretically and experimentally in understanding active transport in steady, periodic flows such as a chain of vortices but many open …
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Development and Verification of Poroelastic Barrier Model With Active Transport: Application in Human Epidermis
… the outmost layer of the skin is treated as an active membrane rather than a passive one. Our work can be divided in two stages: (a) modeling of active mass transport through the viable epidermis, and (b) modeling of the swelling SC. In the former stage we assume that the epidermis consists of a …
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Active transport and concentration of analytes in microfluidic paper based analytical devices using ion concentration polarization
… fluids after becoming fully wet. In this work, active transport and concentration of analytes in fully wet paper-based assays is demonstrated by leveraging ion concentration polarization (ICP). The efficacy of ICP-inducing µPADs is demonstrated through transporting and concentrating dye, …
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Kinetics of Ion Movements Across the Cell Membrane of Cat Erythrocytes and the Phenomenon of Active Transport
Made available in DSpace on 2014-12-09T18:53:03Z (GMT). No. of bitstreams: 1 6604287.pdf: 3805944 bytes, checksum: c8f156c779b00c739babff36a2b02815 (MD5) Previous issue date: 1965
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AN INVESTIGATION OF AQUATIC MACROPHYTE-BASED AQUATIC WASTEWATER TREATMENT SYSTEMS FOR TEMPERATE CLIMATES (ELODEA NUTTALLII, PHOTOSYNTHESIS, NUTRIENT BUDGET, ACTIVE TRANSPORT, NITRIFICATION)
… inhibitors were used to show the presence of an active transport HCO(,3)('-)-H('+) symport which provided high internal CO(,2) concentrations; making Elodea particularly well suited for use in aquatic treatment systems where inorganic carbon may, at times, be limiting.</p>
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Mechanisms Underlying Variation in Insect Chill Tolerance: The Role of Ion and Water Transport
… the mechanisms underlying this variation in transport function. I first related interspecific variation in cold tolerance to water and ion balance in early chill coma. A rapid influx of Na+ to the hemolymph suggests that Na+ first leaks from the tissues, and could drive migration of Na+ and …
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Purification and Characterization of the Cytochrome-O Containing Terminal Oxidase of Escherichia Coli
… by the cell for ATP synthesis, locomotion and active transport of ions and molecules into and out of the cell.
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Transitions in Motion: Accelerating Active Travel Infrastructure in London through Grassroots Groups and Activist Researchers
Active transport plans and infrastructure transition plays a key role in reducing global greenhouse gas emissions and various health issues faced in London, yet has not occurred at a speed required for mitigation or even achieving stated targets and goals. While socio-technical transition research …
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Application of Irreversible Thermodynamics to Biological Membrane Transport Phenomena
… of Onsager's Theory is made to biological transport phenomena. By transforming the coefficient matrix (the Onsager L matrix) to the diagonal form we obtain a new relation between the entropy production and the state parameters (flows or forces) of the system. Active transport across a …
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A mathematical model of the airway epithelium: Computational studies of ion and water balance
… to investigate the time course of ion and water transport across airway epithelia. Model variables were intracellular and apical concentrations of sodium, potassium, chloride; apical, basolateral, and transepithelial membrane potentials; cell and apical volumes. Membrane transport processes …
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Identification and characterization of an adenosine triphosphate binding cassette (ABC) transporter EcABCB1 involved in the transport of alkaloids in Eschscholzia californica
… is taken up into the cell through a potential active transport process. A large and widely distributed superfamily of proteins found in bacteria, fungi, plants and animals called adenosine triphosphate binding cassette (ABC) transporters have been implicated in the influx of alkaloids in …
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Exoelectrogenic biofilm growth in shearing flows
… biofilm adheres to materials involved in liquid transport causing economic loss through corrosion and drag losses on ship hulls, and in oil and food distribution. Microorganisms interacting with surfaces under these open channel flows contend with high shear rates and active transport to the …
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A study of several factors incident to the absorption of choline from the small intestine of the albino rat
… of absorption. In view of the possibility that active transport, and thus enzyme activity, might be involved in choline absorption, it is conceivable that rate of choline absorption might be altered by such enzyme inhibitors as phlorizin and 2, 4-dinitrophenol. Selective areas of choline …
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Ion and Amino Transport in Rabbit Kidney Tissue in Tissue Culture Media
… environment. It is generally accepted that an active metabolic process is involved. Hoffman (1) and Post (2) in reviews present adequate evidence that an active process transporting Na and K is present in the erythrocyte membrane. Keynes in a symposium (3) spoke of the same process existing in …
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Multidrug resistance-associated protein 2 (MRP2) and oxaliplatin transport
… of gastrointestinal cancer. Efflux membrane transporters have been reported to play roles in determining the cellular accumulation and activity of platinum-based drugs, but there have been few studies of oxaliplatin. We hypothesized that the efflux transporter multidrug resistance protein-2 …
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Modeling of the dynamics of autonomous catalytic nanomotors using the method of regularized stokeslets
… cellular level and drive vital functions such as active transport, muscle contraction, cell mobility, and other movement. With the belief that precise control of microscale and nanoscale motors may eventually permit the design of functional machinery at these scales, researchers have been …
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Active flows and networks
… physical, biological, or information transport networks are driven by small-scale local energy input. In the first part of this thesis, we introduce and explore two analytically tractable nonlinear models for such active flow networks, drawing motivation from recent microfluidic …
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ROLE OF OXIDATIVE REACTIVE SPECIES AND ANTIOXIDANTS IN METABOLISM AND TRANSPORT OF THERAPEUTIC DRUGS
… as an imbalance between the production of reactive species and the ability of an organism to detoxify the reactive intermediates and repair the damage. As a result of OS, the excess of reactive species such as oxygen superoxide (O2-), hydroxyl radical (OH), peroxynitrite (ONOO−), …
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