Prolonged and Continuous Measurement of Kidney Oxygenation in Conscious Rats

2015 ◽  
pp. 93-111 ◽  
Author(s):  
Maarten P. Koeners ◽  
Connie P. C. Ow ◽  
David M. Russell ◽  
Roger G. Evans ◽  
Simon C. Malpas
Keyword(s):  
Continuous Measurement ◽  
Conscious Rats

An approach to measuring cardiac output with Doppler flow probes in conscious rats

1988 ◽  
Vol 255 (5) ◽  
pp. H1206-H1210 ◽  
Author(s):  
R. Veelken ◽  
P. Schelling ◽  
T. Unger
Keyword(s):  
Cardiac Output ◽  
Continuous Measurement ◽  
Nerve Fibers ◽  
Ascending Aorta ◽  
Flow Probe ◽  
Doppler Flow ◽  
Conscious Rats ◽  
Cardiac Autonomic Innervation ◽  
Novel Method ◽  
Baroreceptor Activation

The continuous measurement of cardiac output in conscious rats is difficult. Previously, Doppler flow probes have been applied to the ascending aorta by means of silicone cuffs. The placement of these cuffs can conceivably introduce errors engendered by the destruction of nerve fibers that are important in cardiac autonomic innervation. We report a novel method of Doppler flow-probe attachment directly to the ascending aorta by means of a polyacrylic cement. When we compared the response with baroreceptor activation with methoxamine and nitroprusside in conscious rats equipped either with probes attached via cuffs or directly via cement, we observed that animals equipped with cuffs failed to give the expected cardiac output and heart rate responses after nitroprusside administration. In contrast, animals that had their probes attached with cement displayed the expected responses. The data not only show that probes applied with cement give a result superior to probes attached with cuffs but also verify the suspicion that the ascending aorta is associated with nerve fibers that are important in mediating baroreceptor responses.

Direct Measurement of the Listening of Hearing-Impaired Children

1970 ◽  
Vol 13 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Mary Mira
Keyword(s):  
Direct Measurement ◽  
Continuous Measurement ◽  
Hearing Impaired ◽  
Reinforcement System ◽  
School Aged Children ◽  
Conjugate Reinforcement ◽  
Impaired Children ◽  
Hearing Impaired Children

Listening, a significant dimension of the behavior of hearing-impaired children, may be measured directly by recording childrens' responses to obtain audio narrations programmed via a conjugate reinforcement system. Twelve hearing-impaired, school-aged children responded in varying ways to the opportunity to listen. Direct and continuous measurement of listening has relevance for evaluation of remediation methods and for discovery of variables potentially related to listening.

Relaxin is a potent renal vasodilator in conscious rats

1998 ◽  
Vol 5 (1) ◽  
pp. 146A-146A
Author(s):  
L DANIELSON ◽  
O SHERWOOD ◽  
K CONRAD
Keyword(s):  
Conscious Rats

Continuous measurement of free cortisol profiles

2013 ◽  
pp. 1-1
Author(s):  
Ragini C Bhake ◽  
Jack A Leendertz ◽  
Astrid C E Linthorst ◽  
Stafford L Lightman
Keyword(s):  
Continuous Measurement ◽  
Free Cortisol

On-line measurements of settling characteristics in activated sludge

1997 ◽  
Vol 36 (4) ◽  
pp. 307-312
Author(s):  
Michael R. Rasmussen ◽  
Torben Larsen
Keyword(s):  
Activated Sludge ◽  
Settling Velocity ◽  
Continuous Measurement ◽  
Batch Reactor ◽  
Volume Index ◽  
Sludge Volume Index ◽  
Dynamic Variations ◽  
On Line ◽  
Settling Column ◽  
Settling Characteristics

An on-line settling column for measuring the dynamic variations of settling velocity of activated sludge has been developed. The settling column is automatic and self-cleansing insuring continuous and reliable measurements. The settling column was tested on sludge from a batch reactor where sucrose was added as an impulse to activated sludge. The continuous measurement of settling velocity revealed a highly dynamic response after the sucrose was added. The results were verified with simultaneous measurement of the initial settling rate. A 200 hour experiment showed variations in settling velocity, which was not apparent in the DSVI (Diluted Sludge Volume Index).

Sign in / Sign up

Export Citation Format

Share Document