Analysis of an Unusual Failure in a Brazed Tube Assembly

2019 ◽  
pp. 117-129
Author(s):  
Jerry C. Capo ◽  
Chris Bagnall ◽  
Walter J. Moorhead
Keyword(s):  
Tube Assembly

scholarly journals The endoderm and myocardium join forces to drive early heart tube assembly

2015 ◽  
Vol 404 (1) ◽  
pp. 40-54 ◽  
Author(s):  
Anastasiia Aleksandrova ◽  
Andras Czirok ◽  
Edina Kosa ◽  
Oleksandr Galkin ◽  
Tracey J. Cheuvront ◽  
...  
Keyword(s):  
Heart Tube ◽  
Tube Assembly

Experimental Investigation on Flow Characteristic of Stepped Capillary Tube for Heat Pump Type Air Conditioner with R410A

2014 ◽  
Vol 960-961 ◽  
pp. 643-647
Author(s):  
Yan Sheng Xu
Keyword(s):  
Mass Flow Rate ◽  
Heat Pump ◽  
Mass Flow ◽  
Flow Rate ◽  
Capillary Tube ◽  
Coefficient Of Performance ◽  
Tube Length ◽  
Air Conditioner ◽  
Capillary Tubes ◽  
Tube Assembly

A stepped capillary tube consisting of two serially connected capillary tubes with different diameters is invented to replace the conventional expansion device. The mass flow rate of refrigerant R410A in stepped capillary tubes with different size were tested. The model of stepped capillary tube is proposed, and its numerical algorithm for tube length and mass flow rate is developed. The experimental results show that the performance comparing between stepped capillary tube system and capillary tube assembly system, the cooling capacity is reduced by 0.3%, the energy efficiency ratio (EER) is equal to each other, the heating capacity is increased by 0.3%, the coefficient of performance (COP) is decreased by 0.3%. That is to say, the performance index of the two kinds of throttle mechanism is almost identical. It indicates that the stepped capillary tube can replace the capillary tube assembly in the R410A heat pump type air conditioner absolutely. The model is validated with experimental data, and the results show that the model can be used for sizing and rating stepped capillary tube.

scholarly journals Regulation of cell movements during heart tube assembly in zebrafish

2011 ◽  
Vol 25 (S1) ◽  
Author(s):  
Deborah Yelon ◽  
Zayra V. Garavito‐Aguilar
Keyword(s):  
Heart Tube ◽  
Cell Movements ◽  
Tube Assembly

Chain formation and glial tube assembly in the shift from neonatal to adult subventricular zone of the rodent forebrain

2005 ◽  
Vol 487 (4) ◽  
pp. 407-427 ◽  
Author(s):  
Paolo Peretto ◽  
Claudio Giachino ◽  
Patrizia Aimar ◽  
Aldo Fasolo ◽  
Luca Bonfanti
Keyword(s):  
Subventricular Zone ◽  
Chain Formation ◽  
Tube Assembly

scholarly journals Photoinstability of S-Nitrosothiols during Sampling of Whole Blood: A Likely Source of Error and Variability in S-Nitrosothiol Measurements

2008 ◽  
Vol 54 (5) ◽  
pp. 916-918 ◽  
Author(s):  
Yiduo Wu ◽  
Fenghua Zhang ◽  
Yang Wang ◽  
Maheshkumaar Krishnamoorthy ◽  
Prabir Roy-Chaudhury ◽  
...  
Keyword(s):  
Whole Blood ◽  
Light Exposure ◽  
Standard Addition ◽  
Aluminum Foil ◽  
Reference Intervals ◽  
Blood Samples ◽  
Butterfly Needle ◽  
Light Protection ◽  
Initial Sampling ◽  
Tube Assembly

Abstract Background: The determination of reference intervals for the concentration of total S-nitrosothiols (RSNOs) in blood is a highly controversial topic, likely because of the inherent instability of these species. Most currently available techniques to quantify RSNOs in blood require considerable sample handling and multiple pretreatment steps during which light exposure is difficult to completely eliminate. We investigated the effect of brief light exposure on the stability of RSNO species in blood during the initial sampling process. Methods: A novel amperometric RSNO sensor, based on an immobilized organoselenium catalyst at the distal tip of an electrochemical nitric oxide detector, was used to determine RSNO species in diluted whole blood without centrifugation or pretreatment. Porcine blood was collected into aluminum foil–wrapped syringes via a 12-inch butterfly needle tube assembly. Two blood samples were collected from the same animal—one with the butterfly needle tubing wrapped in aluminum foil and one with the tubing exposed to ambient room light. The RSNO concentrations in these sequential blood samples were determined by a standard addition procedure. Results: Eight sets of measurements were made in 6 animals. Samples exposed to light yielded RSNO concentrations only 23.6% (7.2%) [mean (SD)] of the RSNO concentrations determined in samples that were shielded from light and obtained from the same animals. Conclusions: These results suggest significant photoinstablity of RSNOs in whole blood and indicate the critical importance of proper light protection during sampling and processing of blood samples for the accurate determinations of endogenous RSNO concentrations.

scholarly journals Simon Fraser University Radiocarbon Dates III

Radiocarbon ◽  
1984 ◽  
Vol 26 (3) ◽  
pp. 431-440 ◽  
Author(s):  
K A Hobson ◽  
D E Nelson
Keyword(s):  
Sample Preparation ◽  
Combustion Tube ◽  
Distilled Water ◽  
Radiocarbon Dates ◽  
Dry Ice ◽  
Combustion Gases ◽  
Geologic Samples ◽  
Tube Assembly ◽  
Simon Fraser University ◽  
Preparation Techniques

This list reports measurements made on archaeologic and geologic samples by our laboratory from June 1982 to December 1983. Results of measurements made during that period which lack review by submitters will be reported in a subsequent date list. Sample preparation techniques and benzene synthesis remain as described previously (R, 1982, v 24, p 344–351). For low organic samples, such as sediments, we now use a combustion tube assembly. These samples are burned under oxygen flow in a quartz tube. To absorb sulfur and break up nitrous compounds, we pass combustion gases through a 50% mixture of MnO2 and CuO wire heated to ca 500°C. The gas is then bubbled through a distilled water and KMnO4 solution to remove chlorides before being introduced into our standard dry ice and CO2 traps.

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