The possible role of aerosols on stomatal conductivity for water vapour

2001 ◽  
Vol 2 (4) ◽  
pp. 351-364 ◽  
Author(s):  
Jürgen Burkhardt ◽  
Hartmut Kaiser ◽  
Ludger Kappen ◽  
Heiner E. Goldbach
Keyword(s):  
Water Vapour ◽  
Stomatal Conductivity

Role of the Water Vapour Greenhouse Effect in the Forecasting Of Fog Occurrence

2003 ◽  
Vol 107 (2) ◽  
pp. 469-482 ◽  
Author(s):  
P. K. Pasricha ◽  
B. S. Gera ◽  
S. Shastri ◽  
H. K. Maini ◽  
T. John ◽  
...  
Keyword(s):  
Water Vapour ◽  
Greenhouse Effect

Oxidising Role of Water Vapour in the 250 Kev D+ Induced Radiolysis of Polyimide Kapton-H

1988 ◽  
Vol 100 ◽  
Author(s):  
U. K. Chaturvedi ◽  
A. Patnaik ◽  
Ramji Pathak ◽  
R. N. Chakraborty ◽  
A. K. Nigam
Keyword(s):  
Partial Pressure ◽  
Water Vapour ◽  
Ion Beam ◽  
Adsorbed Water ◽  
Vacuum System ◽  
Residual Water ◽  
Implantation Time ◽  
Polymeric Surface ◽  
Imide Ring

Residual water vapour present in the vacuum system has been observed to play a dominant oxidising role in the 250 keV D+ induced radiolysis of polyimide (Kapton-H). The partial pressure (pp) of water in the vacuum system decreases sharply as the D+ beam impinges the polymeric surface, but soon after, it recovers to its initial value as the accumulated dose increases. Emission of CO2 is observed which has its maximum at a time when the H2O partial pressure is at a minimum. The CO2 level also returns to its original level with time. This complementary variation of CO2 and H2O confirms that absorbed and adsorbed water molecules are radiolysed by the ion beam and initiate oxidation of the radiolytically evolved CO to yield CO2 on and within the ion implanted surface of the polyimide. Further, the small enhancement in the 28 amu peak (N2 + CO), which exhibits no maximum/minimum over the entire implantation time, can be understood in terms of the evolution of N2 from the imide ring as a result of radiolysis of this nitrogen containing polymers.

A Study of the Kinetics of the Basic Zinc Carbonate Formation Reaction

1975 ◽  
Vol 30 (9-10) ◽  
pp. 665-668 ◽  
Author(s):  
M. F. O'Connor
Keyword(s):  
Carbon Dioxide ◽  
Water Vapour ◽  
Water Layer ◽  
Water Vapour Pressure ◽  
Formation Reaction ◽  
Zinc Carbonate ◽  
Carbonate Formation ◽  
Carbon Dioxide Pressure ◽  
Kinetics Of

A study of the kinetic parameters involved in the formation of basic zinc carbonate by the action of carbon dioxide and water vapour on zinc oxide has been undertaken. A contracting sphere model is used to explain the reaction but its applicability is dependent upon the carbon dioxide pressure used. Water vapour pressures close to saturated water vapour pressure are necessary for the reaction to proceed and the role of the necessary near-liquid surface water layer in the absorption reaction is discussed.

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