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Decellularization and Recellularization Methods for Avian Lungs: An Alternative Approach for Use in Pulmonary Therapeutics.
Methods Mol Biol
March 2022
Department of Medicine, Larner College of Medicine, The University of Vermont, Burlington, VT, USA.
The shortage of compatible allogeneic organs and an increase in the number of patients requiring long-term lung assist devices while waiting for lung transplantation have motivated scientists to explore alternatives to bioengineer new lungs, including through decellularization and recellularization processes. A novel approach for bioengineering an extracorporeal membrane oxygenator is based on the parenchymal structure of avian lungs which utilizes a cross-current unidirectional flow of air and blood rather than bidirectional airflow, and thus eliminates dead-space ventilation. This provides more efficient gas exchange than mammalian lungs.
View Article and Find Full Text PDFA comparative study of pilot-scale bio-trickling filters with counter- and cross-current flow patterns in the treatment of emissions from chemical fibre wastewater treatment plant.
Bioresour Technol
November 2017
Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China. Electronic address:
Two pilot-scale bio-trickling filters (BTFs) with counter-current and cross-current flow modes were constructed, and their performance tested, for purifying chemical fibre waste gas containing HS, NH and VOCs with a maximum gas flow rate of 1008mh. The counter-current type of BTF presented with superior biodegradation results compared to the cross-current type: it could start up quickly, tolerated high transient shock loadings, and possessed an average contaminant removal efficiency higher than 90% with an empty bed residence time of 59s. The contaminant removal efficiency could be increased by 50% during winter due to the addition of pipeline insulation.
View Article and Find Full Text PDFPivotal debates and controversies on the structure and function of the avian respiratory system: setting the record straight.
Biol Rev Camb Philos Soc
August 2017
Department of Zoology, University of Johannesburg, P.O. Box, 524, Auckland Park, Kingsway, Johannesburg, 2006, South Africa.
Among the extant air-breathing vertebrates, the avian respiratory system is structurally the most complex and functionally the most efficient gas exchanger. Having been investigated for over four centuries, some aspects of its biology have been extremely challenging and highly contentious and others still remain unresolved. Here, while assessing the most recent findings, four notable aspects of the structure and function of the avian respiratory system are examined critically to highlight the questions, speculations, controversies and debates that have arisen from past research.
View Article and Find Full Text PDFUnidirectional pulmonary airflow in vertebrates: a review of structure, function, and evolution.
J Comp Physiol B
July 2016
Department of Biology, University of Utah, Salt Lake City, 257 South 1400 East, Room 201, UT, 84112-0840, USA.
Mechanisms explaining unidirectional pulmonary airflow in birds, a condition where lung gases flow in a consistent direction during both inspiration and expiration in some parts of the lung, were suggested as early as the first part of the twentieth century and unidirectional pulmonary airflow has been discovered recently in crocodilians and squamates. Our knowledge of the functional anatomy, fluid dynamics, and significance of this trait is reviewed. The preponderance of the data indicates that unidirectional airflow is maintained by means of convective inertia in inspiratory and expiratory aerodynamic valves in birds.
View Article and Find Full Text PDFHypoxia-induced miR-15a promotes mesenchymal ablation and adaptation to hypoxia during lung development in chicken.
PLoS One
October 2015
State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing, P. R. China; College of Animal Science, Yunnan Agricultural University, Kunming, P. R. China.
The lungs undergo changes that are adaptive for high elevation in certain animal species. In chickens, animals bred at high elevations (e.g.
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