Combining diffuse reflectance infrared spectroscopy (DRIFTS), dispersive EXAFS, and mass spectrometry with high time resolution: Potential, limitations, and application to the study of NO interaction with supported Rh catalysts

2007 ◽  
Vol 126 (1-2) ◽  
pp. 64-72 ◽  
Author(s):  
Mark A. Newton ◽  
Andrew J. Dent ◽  
Steven G. Fiddy ◽  
Bhrat Jyoti ◽  
John Evans
Keyword(s):  
Mass Spectrometry ◽  
Infrared Spectroscopy ◽  
Time Resolution ◽  
Diffuse Reflectance ◽  
High Time ◽  
High Time Resolution ◽  
Diffuse Reflectance Infrared Spectroscopy ◽  
Diffuse Reflectance Infrared

Figures of Merit for a Diffuse Reflectance Accessory Using an On-Axis Ellipsoidal Collecting Mirror

1988 ◽  
Vol 42 (3) ◽  
pp. 428-433 ◽  
Author(s):  
E. H. Korte
Keyword(s):  
Infrared Spectroscopy ◽  
Noise Level ◽  
Diffuse Reflectance ◽  
Field Of View ◽  
Figures Of Merit ◽  
Size Dependent ◽  
Diffuse Reflectance Infrared Spectroscopy ◽  
Diffuse Reflectance Infrared

The attainable efficiency of an accessory for diffuse reflectance infrared spectroscopy where both the irradiation and detection optics are located on the same side of the sample is analyzed, the size-dependent noise level of the detector being taken into account. The resulting figures of merit are found to reach up to more than 0.3, when standard detectors of 60° field-of-view are considered.

Monitoring Decay of Black Gum Wood (Nyssa Sylvatica) during Growth of the Shiitake Mushroom (Lentinula edodes) Using Diffuse Reflectance Infrared Spectroscopy

2003 ◽  
Vol 57 (5) ◽  
pp. 514-517 ◽  
Author(s):  
Christopher H. Vane
Keyword(s):  
Infrared Spectroscopy ◽  
Diffuse Reflectance ◽  
Lentinula Edodes ◽  
White Rot ◽  
White Rot Fungus ◽  
Shiitake Mushroom ◽  
Absorption Bands ◽  
Diffuse Reflectance Infrared Spectroscopy ◽  
Nyssa Sylvatica ◽  
Diffuse Reflectance Infrared

Abstract diffuse reflectance infrared spectroscopy (DRIFT) and elemental analysis were employed to monitor biodegradation of black gum wood ( Nyssa sylvatica) during growth of the shiitake mushroom ( Lentinula edodes). Black gum was decayed for up to 4.3 years by L. edodes, during which time it was sampled at 19, 31, and 52 months. Biodegraded woods displayed increased % O (w/w) and decreased % C (w/w) relative to the undecayed control. The DRIFT spectra of decayed black gum showed a decrease in relative intensity of absorption bands at 1735 cm−1 assigned to carboxyl functional groups from xylans and an increase in the absorption band at 1640 cm−1 assigned to conjugated carbonyl groups originating from lignin. Xylan decay was rapid initially but slowed after 19 months; however, oxidative decay of the lignin side chains occurred throughout the 52-month decay period. Overall elemental and DRIFT data show that both polysaccharides and lignin were decayed during cultivation of the edible white-rot fungus.

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