title: Control of matric water potential by temperature differential.
abstract: A method for controlling relative humidity based on temperature differentials, rather than on salt solutions, is described.  This method has the following advantages:  (1) it does not exhibit the anomalous CO2 solution effects that we have found to occur with salt solutions; (2) humidity is continuously adjustable without sample removal; (3) circulation of the atmosphere results in short equilibration times.
authors.affiliation: Department of Biological Science, Florida State University, Tallahassee, FL, USA.
authors.forename: R J
authors.initials: RJ
authors.lastname: Palmer
authors.forename: J A
authors.initials: JA
authors.lastname: Nienow
authors.forename: E I
authors.initials: EI
authors.lastname: Friedmann
mesh_terms: D001272:Atmosphere; D002245:Carbon Dioxide / Q000032:analysis / Q000737:chemistry; D005740:Gases; D006813:Humidity; D008828:Microbiological Techniques; D010788:Photosynthesis; D012965:Sodium Chloride / Q000737:chemistry; D012996:Solutions; D013696:Temperature; D014867:Water / Q000737:chemistry*; D014871:Water Microbiology
chemical_list: D005740:Gases; D012996:Solutions; D014867:Water; D002245:Carbon Dioxide; D012965:Sodium Chloride