scholarly journals Non-Invasive Determination of Waste Drum Pressurization by Acoustic Resonance Spectroscopy

1993 ◽  
Vol 333 ◽  
Author(s):  
Dipen N. Sinha ◽  
Stanley T. Kosiewicz
Keyword(s):  
Acoustic Resonance ◽  
Resonance Spectroscopy ◽  
Non Invasive ◽  
Waste Storage ◽  
Acoustic Technique ◽  
Resonance Frequencies ◽  
Noninvasive Characterization ◽  
Acoustic Resonance Spectroscopy

ABSTRACTPreliminary work suggests that Acoustic Resonance Spectroscopy (ARS) can non-invasively determine gas pressurization of waste drums. This is done by exciting the various mechanical vibrational modes of the test drum and analyzing the characteristics of the resulting resonance frequencies and their higher harmonics. If the contained waste is a liquid, the liquid level and also some properties of the liquid including density can be determined. Additional work is needed to exploit this novel acoustic technique for noninvasive characterization of waste storage drums.

Hyperpolarized 129Xe Magnetic Resonance Spectroscopy in a Rat Model of Bronchopulmonary Dysplasia

2021 ◽  
Author(s):  
Jordan David Fliss ◽  
Brandon Zanette ◽  
Yonni Friedlander ◽  
Siddharth Sadanand ◽  
Andras A Lindenmaier ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Gas Exchange ◽  
Magnetic Resonance Spectroscopy ◽  
Bronchopulmonary Dysplasia ◽  
Rat Model ◽  
Resonance Spectroscopy ◽  
Gas Exchange Parameters ◽  
Functional Changes ◽  
Non Invasive

Premature infants often require mechanical ventilation and oxygen therapy which can result in bronchopulmonary dysplasia (BPD), characterized by developmental arrest and impaired lung function. Conventional clinical methods for assessing the prenatal lung are not adequate for the detection and assessment of long-term health risks in infants with BPD, highlighting the need for a non-invasive tool for the characterization of lung microstructure and function. Theoretical diffusion models, like the Model of Xenon Exchange (MOXE), interrogate alveolar gas exchange by predicting the uptake of inert Hyperpolarized (HP) 129Xe gas measured with HP 129Xe magnetic resonance spectroscopy (MRS). To investigate HP 129Xe MRS as a tool for non-invasive characterization of pulmonary microstructural and functional changes in vivo, HP 129Xe gas exchange data were acquired in an oxygen exposure rat model of BPD that recapitulates the fewer and larger distal airways and pulmonary vascular stunting characteristics of BPD. Gas exchange parameters from MOXE, including airspace mean chord length (L­m), apparent hematocrit in the pulmonary capillaries (HCT), and pulmonary capillary transit time (tx), were compared with airspace mean axis length and area density (MAL and ρ­A) and percentage area of tissue and air (PTA and PAA) from histology. L­m was significantly larger in the exposed rats (p=0.003) and correlated with MAL, ρ­A, PTA, and PAA (0.59<|ρ|<0.66 and p<0.05). Observed increase in HCT (p=0.012) and changes in tx are also discussed. These findings support the use of HP 129Xe MRS for detecting fewer, enlarged distal airways in this rat model of BPD, and potentially in humans.

Gas Detection in a Gas-Liquid Flow Using an Acoustic Resonance Spectroscopy Method

2008 ◽  
Vol 51 (1) ◽  
pp. 191-196 ◽  
Author(s):  
Jian-Sheng CONG ◽  
Xiu-Ming WANG ◽  
De-Hua CHEN ◽  
De-Long XU ◽  
Cheng-Xuan CHE ◽  
...  
Keyword(s):  
Liquid Flow ◽  
Acoustic Resonance ◽  
Spectroscopy Method ◽  
Gas Detection ◽  
Resonance Spectroscopy ◽  
Gas Liquid Flow ◽  
Acoustic Resonance Spectroscopy

scholarly journals Differential acoustic resonance spectroscopy: improved theory and application in the low frequency range

2015 ◽  
Vol 202 (3) ◽  
pp. 1775-1791 ◽  
Author(s):  
Jianguo Zhao ◽  
Shangxu Wang ◽  
Xiaolong Tong ◽  
Hanjun Yin ◽  
Dongju Yuan ◽  
...  
Keyword(s):  
Low Frequency ◽  
Acoustic Resonance ◽  
Resonance Spectroscopy ◽  
Frequency Range ◽  
Acoustic Resonance Spectroscopy
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