A novel method for geographical origin identification ofTetrastigma hemsleyanum(Sanyeqing) by near-infrared spectroscopy

2018 ◽  
Vol 10 (25) ◽  
pp. 2980-2988 ◽  
Author(s):  
Weiqun Lin ◽  
Qinqin Chai ◽  
Wu Wang ◽  
Yurong Li ◽  
Bin Qiu ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Geographical Origin ◽  
Medicinal Herb ◽  
Tetrastigma Hemsleyanum ◽  
Novel Method ◽  
Origin Identification

Tetrastigma hemsleyanumDiels et Gilg (T. hemsleyanum), also known as Sanyeqing in Chinese, is a rare medicinal herb.

Characterization of molecular orientation under tensile deformation by near infrared spectroscopy

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Masami Mizushima ◽  
Takanobu Kawamura ◽  
Kenji Takahashi ◽  
Koh-hei Nitta
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Tensile Deformation ◽  
Crystal Form ◽  
Orientation Function ◽  
Chain Axis ◽  
Stretching Vibration ◽  
Novel Method

AbstractWe present a novel method for characterizing orientation behavior of typical polyethylene (PE) materials such as HDPE, LLDPE, and LDPE. The chain orientation to the stretching direction was examined under uniaxial deformation by near infrared spectroscopy. Then we obtained directly the orientation function of PE chain axis (c-axis) from the CH stretching vibration of NIR spectra as a function of extension time or strain. We compared the present method with the conventional infrared IR method where the orientation function of PE c-axis (chain-axis) has been indirectly obtained from the b-and a-axis’s assuming the orthogonal crystal form by using the CH2 rocking vibrations in IR spectra

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