Ultrasonic activity phases measured on Lipari

1993 ◽  
Vol 16 (3) ◽  
pp. 315-318 ◽  
Author(s):  
P. Diodati ◽  
S. Piazza
Keyword(s):  
Ultrasonic Activity

scholarly journals What does the ultrasonic activity recording device measure?

1968 ◽  
Vol 1 (5) ◽  
pp. 180-182 ◽  
Author(s):  
Robert C. Bolles ◽  
George H. Sanders
Keyword(s):  
Recording Device ◽  
Ultrasonic Activity

A Solid-State Ultrasonic Activity-Recording Unit

1973 ◽  
Vol 86 (3) ◽  
pp. 647
Author(s):  
Gary McClure ◽  
Donald G. Forgays ◽  
David G. Whitmore
Keyword(s):  
Solid State ◽  
Ultrasonic Activity ◽  
Recording Unit

scholarly journals AB0361 The impact of obesity in clinical and ultrasonic activity of tunisian rheumatoid arthritis

2018 ◽  
Author(s):  
K. ben abdelghani ◽  
A. feki ◽  
A. fazaa ◽  
K. ouenniche ◽  
S. miladi ◽  
...  
Keyword(s):  
Rheumatoid Arthritis ◽  
Ultrasonic Activity ◽  
The Impact

Sensory Stimulation and Rhesus Monkey Activity

1965 ◽  
Vol 21 (1) ◽  
pp. 319-322 ◽  
Author(s):  
William A. Draper
Keyword(s):  
Rhesus Monkeys ◽  
Stimulus Condition ◽  
Sensory Stimulation ◽  
Ambient Illumination ◽  
Relay System ◽  
Cage Activity ◽  
Ultrasonic Activity ◽  
Activity Recorder ◽  
Photoelectric Relay ◽  
Post Condition

Variation in the cage activity (measured simultaneously by a photoelectric relay system and an ultrasonic activity recorder) of six rhesus monkeys was directly related to the level of ambient illumination, whereas changes in noise level had only minimal effect. Activity changes were specific to the stimulus condition and no systematic residual post-condition effects were in evidence.

scholarly journals Evidence for Air-Seeding: Watching the Formation of Embolism in Conifer Xylem

2014 ◽  
Vol 1 ◽  
pp. e004 ◽  
Author(s):  
Stefan Mayr ◽  
B. Kartusch ◽  
S. Kikuta
Keyword(s):  
Water Transport ◽  
Juniperus Virginiana ◽  
Water Potentials ◽  
Ultrasonic Activity ◽  
Water Columns ◽  
Ultrasonic Emission ◽  
Complex Movement

Water transport in plants is based on a metastable system as the xylem “works” at negative water potentials (ψ). At critically low ψ, water columns can break and cause embolism. According to the air-seeding hypothesis, this occurs by air entry via the pits. We studied the formation of embolism in dehydrating xylem sections of Juniperus virginiana (Cupressaceae), which were monitored microscopically and via ultrasonic emission analyses. After replacement of water by air in outer tracheid layers, a complex movement of air-water menisci into tracheids was found. With decreasing ψ, pits started to aspirate and the speed of menisci movements increased. In one experiment, an air-seeding event could be detected at a pit. The onset of ultrasonic activity was observed when pits started to close, and ultrasonic emission ceased at intense dehydration. Experiments clearly indicated that predictions of the air-seeding hypothesis are correct: At low ψ, pit mechanisms to prevent air entry failed and air spread into tracheids. ψ fluctuations caused complex movements of air-water menisci and pits, and at low ψ, air-seeding caused ultrasonic emissions. Main insights are presented in a video.

scholarly journals Freeze-Thaw Stress: Effects of Temperature on Hydraulic Conductivity and Ultrasonic Activity in Ten Woody Angiosperms

2013 ◽  
Vol 164 (2) ◽  
pp. 992-998 ◽  
Author(s):  
Guillaume Charrier ◽  
Katline Charra-Vaskou ◽  
Jun Kasuga ◽  
Hervé Cochard ◽  
Stefan Mayr ◽  
...  
Keyword(s):  
Hydraulic Conductivity ◽  
Freeze Thaw ◽  
Stress Effects ◽  
Ultrasonic Activity ◽  
Effects Of Temperature

A multichannel ultrasonic activity monitor forin-vitro screening of antischistosomal drugs

1978 ◽  
Vol 16 (4) ◽  
pp. 408-418 ◽  
Author(s):  
M. C. Brown ◽  
D. F. Norman ◽  
D. R. Bell ◽  
C. J. Chavasse
Keyword(s):  
Activity Monitor ◽  
Ultrasonic Activity
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