TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Instrument ... used to measure water potential of plant leaves.  3, record 1, English, - pressure%20bomb

Record number: 1, Textual support number: 1 CONT

Simply put, the pressure chamber... is just a device for applying air pressure to a leaf(or small shoot), where most of the leaf is inside the chamber but a small part of the leaf stem(the petiole) is exposed to the outside of the chamber through a seal. The amount of pressure that it takes to cause water to appear at the petiole tells you how much tension the leaf is experiencing on its water : a high value of pressure means a high value of tension and a high degree of water stress. The units of pressure most commonly used are the Bar(1 Bar=14. 5 pounds per square inch) and the megapascal(1 MPa=10 bars).  4, record 1, English, - pressure%20bomb

Record number: 1, Textual support number: 2 CONT

How is water potential measured? ... - Pressure bomb (pressure chamber): measures [psi subscript w] of whole leaves, stems : - when a stem or leaf is cut off of a plant, the sap is sucked back into the xylem, since it is under tension; - the tissue is sealed inside a steel chamber, with the cut end protruding; - pressure is applied (using compressed nitrogen) until the sap is pushed back up to the top; this amount of pressure is equal but opposite to the [Psi subscript w] of the tissue.  5, record 1, English, - pressure%20bomb

Record number: 1, Textual support number: 1 OBS

There are different types of pressure chambers, some using a tank of high pressure gas, some using a hand-pump, but all work on the same basic principle and in most cases the operation and use of the different types of pressure chambers is identical.  4, record 1, English, - pressure%20bomb

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

[Instrument de] mesure de l'état hydrique [...]  4, record 1, French, - chambre%20%C3%A0%20pression

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Bar sealing... Concept : Jaw sealer with one or two heated opposed bars. Applications : Manufacture and closing of laminated pouches, cup lidding form fill seal packaging(eg. potato chip bags).  3, record 2, English, - bar%20sealing

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 OBS

Principe [:] Barres chauffantes [...] venant pincer les 2 films à souder. Principales applications [:] Soudure de sachets sur machines Form-Fill-Seal verticales ou horizontales. Operculage de pots et barquettes.  2, record 2, French, - soudage%20par%20barres%20chauffantes

Record number: 2, Textual support number: 2 OBS

Bien que contesté par le Grand Dictionnaire Encyclopédique Larousse, le terme «soudure» est employé au sens de «soudage» (opération) par les auteurs de «L'emballage sous toutes ses facettes» (code : BEMBA, 1988), ouvrage piloté par le Laboratoire National d'Essais de France et la revue Emballages Magazine.  1, record 2, French, - soudage%20par%20barres%20chauffantes

Record 2,  Textual support,  Spanish