Nest ventilation explains gas composition in the nest-chamber of the European bee-eater

1992 ◽  
Vol 87 (3) ◽  
pp. 407-418 ◽  
Author(s):  
Amos Ar ◽  
Yael Piontkewitz
Keyword(s):  
Gas Composition ◽  
Nest Chamber

ESEM - A multipurpose surface Electron Microscope

1986 ◽  
Vol 44 ◽  
pp. 632-633 ◽  
Author(s):  
G.D. Danilatos
Keyword(s):  
Electron Microscope ◽  
Room Temperature ◽  
Environmental Scanning ◽  
Gas Composition ◽  
Saturated Water Vapor ◽  
Surface Electron ◽  
Current State ◽  
Saturated Water ◽  
New Type ◽  
Temperature And Pressure

Over recent years a new type of electron microscope - the environmental scanning electron microscope (ESEM) - has been developed for the examination of specimen surfaces in the presence of gases. A detailed series of reports on the system has appeared elsewhere. A review summary of the current state and potential of the system is presented here.The gas composition, temperature and pressure can be varied in the specimen chamber of the ESEM. With air, the pressure can be up to one atmosphere (about 1000 mbar). Environments with fully saturated water vapor only at room temperature (20-30 mbar) can be easily maintained whilst liquid water or other solutions, together with uncoated specimens, can be imaged routinely during various applications.

Effect of Shield Gas Composition on Cold Cracking Susceptibility of YS 600 MPa Flux Cored Arc Weld Metal

2015 ◽  
Vol 53 (7) ◽  
pp. 480-487 ◽  
Author(s):  
Namhyun Kang ◽  
Guo Xian ◽  
Myungjin Lee ◽  
Junghoon Lee
Keyword(s):  
Weld Metal ◽  
Cold Cracking ◽  
Gas Composition

Inspired Gas Composition Influences Recovery from Experimental Venous Air Embolism

1991 ◽  
Author(s):  
Joseph A. Bettencourt ◽  
Charles M. Harrison ◽  
Theodore Plemons ◽  
Patricia L. Schleiff ◽  
William J. Mehm
Keyword(s):  
Air Embolism ◽  
Gas Composition ◽  
Venous Air Embolism

Effect of gas composition on Ru dissolution and crossover in polymer-electrolyte membrane fuel cells

2010 ◽  
Vol 195 (15) ◽  
pp. 4622-4627 ◽  
Author(s):  
Tommy T.H. Cheng ◽  
Nengyou Jia ◽  
Vesna Colbow ◽  
Silvia Wessel ◽  
Monica Dutta
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Gas Composition ◽  
Electrolyte Membrane

scholarly journals Spectroscopic Techniques versus Pitot Tube for the Measurement of Flow Velocity in Narrow Ducts

Sensors ◽  
2020 ◽  
Vol 20 (24) ◽  
pp. 7349
Author(s):  
Francesco D’Amato ◽  
Silvia Viciani ◽  
Alessio Montori ◽  
Marco Barucci ◽  
Carmen Morreale ◽  
...  
Keyword(s):  
Flow Field ◽  
Flow Velocity ◽  
Pitot Tube ◽  
Optical Measurements ◽  
Trace Gas ◽  
Dual Function ◽  
Spectroscopic Techniques ◽  
Gas Composition ◽  
Flow Conditions ◽  
Theoretical Simulation

In order to assess the limits and applicability of Pitot tubes for the measurement of flow velocity in narrow ducts, e.g., biomass burning plants, an optical, dual function device was implemented. This sensor, based on spectroscopic techniques, targets a trace gas, injected inside the stack either in bursts, or continuously, so performing transit time or dilution measurements. A comparison of the two optical techniques with respect to Pitot readings was carried out in different flow conditions (speed, temperature, gas composition). The results of the two optical measurements are in agreement with each other and fit quite well the theoretical simulation of the flow field, while the results of the Pitot measurements show a remarkable dependence on position and inclination of the Pitot tube with respect to the duct axis. The implications for the metrology of small combustors’ emissions are outlined.

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