Polysulfide – Diffusion Analysis

2019 ◽  
pp. 175-225
Keyword(s):  
Diffusion Analysis

1H NMR characterisation of the diffusional properties of methanogenic granular sludge

1999 ◽  
Vol 39 (7) ◽  
pp. 187-194 ◽  
Author(s):  
P. Lens ◽  
F. Vergeldt ◽  
G. Lettinga ◽  
H. Van As
Keyword(s):  
Diffusion Coefficient ◽  
Relaxation Time ◽  
Bacterial Cell ◽  
Granular Sludge ◽  
T2 Relaxation ◽  
Self Diffusion ◽  
Diffusion Analysis ◽  
S Matrix ◽  
Granular Matrix ◽  
Pfg Nmr

The diffusive properties of mesophilic methanogenic granular sludge have been studied using diffusion analysis by relaxation time separated pulsed field gradient nuclear magnetic resonance (DARTS PFG NMR) spectroscopy. NMR measurements were performed at 22°C with 10 ml granular sludge at a magnetic field strength of 0.5 T (20 MHz resonance frequency for protons). Spin-spin relaxation (T2) time measurements indicate that three 1H populations can be distinguished in methanogenic granular sludge beds, corresponding to water in three different environments. The T2 relaxation time measurements clearly differentiate the extragranular water (T2 ≈ 1000 ms) from the water present in the granular matrix (T2 = 40-100 ms) and bacterial cell associated water (T2 = 10-15 ms). Self-diffusion coefficient measurements at 22°C of the different 1H-water populations as the tracer show that methanogenic granular sludge does not contain one unique diffusion coefficient. The observed distribution of self-diffusion coefficients varies between 1.1 × 10−9 m2/s (bacterial cell associated water) and 2.1 × 10−9 m2/s (matrix associated water).

scholarly journals Spectral Diffusion Analysis of Intravoxel Incoherent Motion MRI in Cerebral Small Vessel Disease

2020 ◽  
Vol 51 (4) ◽  
Author(s):  
Sau May Wong ◽  
Walter H. Backes ◽  
Gerhard S. Drenthen ◽  
C. Eleana Zhang ◽  
Paulien H.M. Voorter ◽  
...  
Keyword(s):  
Small Vessel Disease ◽  
Cerebral Small Vessel Disease ◽  
Spectral Diffusion ◽  
Small Vessel ◽  
Intravoxel Incoherent Motion ◽  
Vessel Disease ◽  
Diffusion Analysis ◽  
Motion Mri

Rotational Diffusion Analysis of Polyethylene Glycol Induced Protein Interactions

2011 ◽  
Vol 115 (41) ◽  
pp. 11786-11792 ◽  
Author(s):  
Daisuke Takahashi ◽  
Shoji Yamashita ◽  
Om Prakash ◽  
Etsuko Nishimoto
Keyword(s):  
Polyethylene Glycol ◽  
Protein Interactions ◽  
Rotational Diffusion ◽  
Diffusion Analysis

Current Diffusion Analysis of Finite Width Conductor Plate

2021 ◽  
Vol 49 (4) ◽  
pp. 1484-1488
Author(s):  
Zhihua Zhao ◽  
Wenlu Li ◽  
Xiangming Zhang
Keyword(s):  
Finite Width ◽  
Diffusion Analysis

Inter-diffusion analysis of joint interface of tungsten–rhenium couple

2011 ◽  
Vol 416 (3) ◽  
pp. 270-272 ◽  
Author(s):  
Y.F. Hua ◽  
Z.X. Li ◽  
X. Zhang ◽  
J.H. Du ◽  
C.L. Huang ◽  
...  
Keyword(s):  
Joint Interface ◽  
Diffusion Analysis

The Contact Diffusion of Linguistic Practices

2015 ◽  
Vol 5 (2) ◽  
pp. 169-201 ◽  
Author(s):  
Jürgen Bohnemeyer ◽  
Katharine T. Donelson ◽  
Randi E. Moore ◽  
Elena Benedicto ◽  
Alyson Eggleston ◽  
...  
Keyword(s):  
Language Contact ◽  
Language Use ◽  
Reference Frames ◽  
Indigenous Languages ◽  
Spatial Reference ◽  
Diffusion Analysis ◽  
Significant Difference ◽  
Education Levels ◽  
Spatial Reference Frame ◽  
Using Data

We examine the extent to which practices of language use may be diffused through language contact and areally shared, using data on spatial reference frame use by speakers of eight indigenous languages from in and around the Mesoamerican linguistic area and three varieties of Spanish. Regression models show that the frequency of L2-Spanish use by speakers of the indigenous languages predicts the use of relative reference frames in the L1 even when literacy and education levels are accounted for. A significant difference in frame use between the Mesoamerican and non-Mesoamerican indigenous languages further supports the contact diffusion analysis.

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