A gas-exchange study of the differential response of Quercus species to long-term fumigations with a gradient of sulphur dioxide

1995 ◽  
Vol 85 (3) ◽  
pp. 1257-1262 ◽  
Author(s):  
G. Lorenzini ◽  
A. Panicucci ◽  
C. Nali
Keyword(s):  
Gas Exchange ◽  
Sulphur Dioxide ◽  
Differential Response ◽  
Exchange Study ◽  
Quercus Species

Long-term liming improves soil fertility and soybean root growth, reflecting improvements in leaf gas exchange and grain yield

2021 ◽  
Vol 128 ◽  
pp. 126308
Author(s):  
João William Bossolani ◽  
Carlos Alexandre Costa Crusciol ◽  
José Roberto Portugal ◽  
Luiz Gustavo Moretti ◽  
Ariani Garcia ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Root Growth ◽  
Soil Fertility ◽  
Grain Yield ◽  
Leaf Gas Exchange ◽  
Soybean Root

A gas-exchange study of photosynthesis and isoprene emission inQuercus rubra L.

Planta ◽  
1990 ◽  
Vol 182 (4) ◽  
pp. 523-531 ◽  
Author(s):  
Francesco Loreto ◽  
Thomas D. Sharkey
Keyword(s):  
Gas Exchange ◽  
Isoprene Emission ◽  
Exchange Study

scholarly journals Quantitative effects of environmental variation on stomatal anatomy and gas exchange in a grass model

2021 ◽  
Author(s):  
Tiago DG Nunes ◽  
Magdalena W Slawinska ◽  
Heike Lindner ◽  
Michael T Raissig
Keyword(s):  
Gas Exchange ◽  
Anatomical Variation ◽  
Brachypodium Distachyon ◽  
Carbon Assimilation ◽  
Light Response ◽  
Gas Analysis ◽  
Environmental Signals ◽  
Grass Model ◽  
Kinetics Of

Stomata are cellular pores on the leaf epidermis that allow plants to regulate carbon assimilation and water loss. Stomata integrate environmental signals to regulate pore apertures and optimize gas exchange to fluctuating conditions. Here, we quantified intraspecific plasticity of stomatal gas exchange and anatomy in response to seasonal variation in Brachypodium distachyon. Over the course of two years we (i) used infrared gas analysis to assess light response kinetics of 120 Bd21-3 wild-type individuals in an environmentally fluctuating greenhouse and (ii) microscopically determined the seasonal variability of stomatal anatomy in a subset of these plants. We observed systemic environmental effects on gas exchange measurements and remarkable intraspecific plasticity of stomatal anatomical traits. To reliably link anatomical variation to gas exchange, we adjusted anatomical gsmax calculations for grass stomatal morphology. We propose that systemic effects and variability in stomatal anatomy should be accounted for in long-term gas exchange studies.

scholarly journals Technical note: GUARD – An automated fluid sampler preventing sample alteration by contamination, evaporation and gas exchange, suitable for remote areas and harsh conditions

2018 ◽  
Author(s):  
Arno Hartmann ◽  
Marc Luetscher ◽  
Ralf Wachter ◽  
Philipp Holz ◽  
Elisabeth Eiche ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Field Experiments ◽  
Hydrological Cycle ◽  
Technical Note ◽  
Production Costs ◽  
Environmental Research ◽  
Remote Areas ◽  
Wide Range ◽  
Public And Private Sector

Abstract. Automated water sampling devices adapted to field operation have proven highly useful for environmental research as well as in the public and private sector, where natural or artificial waters need to be tested regularly for compliance with environmental and health regulations. Such autosamplers are already available on the market in slightly differing versions, but none of these devices are capable of sealing the collected samples to prevent sample alteration by contamination, evaporation or gas exchange. In many sampling cases, however, this feature is essential, for instance for studying the hydrological cycle based on isotopes in rainwater, or for monitoring waters contaminated with toxic gases or other volatile compounds detrimental to biota and human health. Therefore, we have developed a new mobile autosampler, which injects water samples directly into airtight vials, thus preventing any sample alteration. Further advantages include low production costs, compact dimensions and low weight allowing for easy transport, a wide range of selectable sampling intervals as well as a low power consumption, which make it suitable for long-term applications even in remote areas and harsh (outdoor) conditions due to its heavy-duty water-proof casing. In this paper, we demonstrate (1) the sampler's mechanical functioning, (2) the long-term stability of the collected samples with regard to evaporation and gas exchange and (3) the potential of our device in a wide variety of applications drawing on laboratory and field experiments in different karst caves, which represent one of the most challenging sampling environments.

Endotracheal and Enteric Tubes

Chest Imaging ◽  
2019 ◽  
pp. 35-39
Author(s):  
Tyler H. Ternes
Keyword(s):  
Mechanical Ventilation ◽  
Gas Exchange ◽  
Endotracheal Tube ◽  
Medical Devices ◽  
Esophageal Intubation ◽  
Ideal Position ◽  
Tracheostomy Tubes ◽  
Tube Malposition ◽  
The Ideal

The Endotracheal and Enteric Tubes chapter addresses these frequently used medical devices. An endotracheal tube (ETT) is a catheter placed into the airway for mechanical ventilation. It serves to protect the airway and provide adequate gas exchange. The ideal position of the endotracheal tube tip is approximately 5 cm above the carina. Complications of ETT placement include inadequate ventilation if placed too high or too low, esophageal intubation and tracheal injury. Tracheostomy tubes are used in patients who require long-term intubation. Enteric tubes are thin flexible hollow catheters that course into the stomach and beyond. They may be placed via nasal (nasogastic) or oral (orogastric) approach. When used for suctioning, the ideal position of the tube tip is within the stomach. When used for administration of drugs or nutrition, the tube tip is ideally advanced beyond the pylorus. Enteric tube malposition may be due to coiling within the esophagus or inadvertent malposition within the airway. Malpositioning could result in aspiration, lung injury, and pneumothorax.

scholarly journals Four-year measurement of net ecosystem gas exchange of switchgrass in a Mediterranean climate after long-term arable land use

GCB Bioenergy ◽  
2018 ◽  
Vol 11 (3) ◽  
pp. 466-482 ◽  
Author(s):  
Nicola Di Virgilio ◽  
Osvaldo Facini ◽  
Andrea Nocentini ◽  
Marianna Nardino ◽  
Federica Rossi ◽  
...  
Keyword(s):  
Land Use ◽  
Gas Exchange ◽  
Mediterranean Climate ◽  
Arable Land ◽  
Arable Land Use
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