scholarly journals An overview of methods of fine and ultrafine particle collection for physicochemical characterisation and toxicity assessments

2021 ◽  
Vol 756 ◽  
pp. 143553
Author(s):  
Prashant Kumar ◽  
Gopinath Kalaiarasan ◽  
Alexandra E. Porter ◽  
Alessandra Pinna ◽  
Michał M. Kłosowski ◽  
...  
Keyword(s):  
Ultrafine Particle ◽  
Particle Collection ◽  
Physicochemical Characterisation

Enhancement of electrostatic precipitator ultrafine particle collection efficiency by prechargers

1997 ◽  
Vol 28 ◽  
pp. S281-S282 ◽  
Author(s):  
Akinori Zukeran ◽  
Paul C. Looy ◽  
Alexander A. Berezin ◽  
Jen-Shih Chang ◽  
Tairo Ito
Keyword(s):  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Ultrafine Particle ◽  
Particle Collection

Molecular, rheological and physicochemical characterisation of puka gum, an arabinogalactan-protein extracted from the Meryta sinclairii tree

2020 ◽  
Author(s):  
MSM Wee ◽  
Ian Sims ◽  
KKT Goh ◽  
L Matia-Merino
Keyword(s):  
Hydrodynamic Radius ◽  
Average Molecular Weight ◽  
Gum Arabic ◽  
Water Soluble ◽  
Arabinogalactan Protein ◽  
Type Ii ◽  
Weight Average Molecular Weight ◽  
Soluble Polysaccharide ◽  
Physicochemical Characterisation ◽  
Increasing Temperature

© 2019 Elsevier Ltd A water-soluble polysaccharide (type II arabinogalactan-protein) extracted from the gum exudate of the native New Zealand puka tree (Meryta sinclairii), was characterised for its molecular, rheological and physicochemical properties. In 0.1 M NaCl, the weight average molecular weight (Mw) of puka gum is 5.9 × 106 Da with an RMS radius of 56 nm and z-average hydrodynamic radius of 79 nm. The intrinsic viscosity of the polysaccharide is 57 ml/g with a coil overlap concentration 15% w/w. Together, the shape factor, p, of 0.70 (exponent of RMS radius vs. hydrodynamic radius), Smidsrød-Haug's stiffness parameter B of 0.031 and Mark-Houwink exponent α of 0.375 indicate that the polysaccharide adopts a spherical conformation in solution, similar to gum arabic. The pKa is 1.8. The polysaccharide exhibits a Newtonian to shear-thinning behaviour from 0.2 to 25% w/w. Viscosity of the polysaccharide (1 s−1) decreases with decreasing concentration, increasing temperature, ionic strength, and at acidic pH.

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