Constitutron of the glucan from mango. Mangifera indica L. II. Barry degradation studies

1965 ◽  
Vol 18 (6) ◽  
pp. 845 ◽  
Author(s):  
A Das ◽  
CVN Rao
Keyword(s):  
Light Scattering ◽  
Mangifera Indica ◽  
Size And Shape ◽  
Scattering Measurements ◽  
Degradation Studies

From the results of Barry degradation studies, the 1→3 and 1→4 linked glucopyranose units present in the glucan have been proved to occur in blocks. Size and shape of the glucan have been determined from light-scattering measurements.

Structural investigations of the araban from guava, Psidium guajava L

1965 ◽  
Vol 18 (6) ◽  
pp. 851 ◽  
Author(s):  
UK Sengupta ◽  
AK Mukherjee ◽  
CVN Rao
Keyword(s):  
Light Scattering ◽  
Periodate Oxidation ◽  
Molecular Size ◽  
Psidium Guajava ◽  
Molar Ratio ◽  
Structural Investigations ◽  
Scattering Measurements ◽  
Degradation Studies ◽  
Hydrolysis Of

The pulp of guava, Psidium guajava L., contains an araban which can be enriched by extraction with 70% ethanol. Hydrolysis of the fully methylated pure araban, obtained during fractionation of the methylated polysaccharide, yielded 2,3,5-tri-, 2,3-di-, and 2-O-methyl-L-arabinofuranose in the molar ratio of 1 : 1.04 : 0.93, together with a small amount of arabinose. A structure has been suggested from these results which was corroborated by results from periodate oxidation studies. Sequence of branching has been confirmed from Barry degradation studies. Information about molecular size has been obtained from light scattering measurements.

Size and Shape Prediction of Colloidal Metal Oxide MgBaFeO Particles from Light Scattering Measurements

2006 ◽  
Vol 8 (6) ◽  
pp. 981-994 ◽  
Author(s):  
Mustafa M. Aslan ◽  
Mustafa Pinar Mengüç ◽  
Siva Manickavasagam ◽  
Craig Saltiel
Keyword(s):  
Light Scattering ◽  
Metal Oxide ◽  
Size And Shape ◽  
Shape Prediction ◽  
Scattering Measurements ◽  
Colloidal Metal

Scattering Rings in Birefringent Porous Silicon

2003 ◽  
Vol 762 ◽  
Author(s):  
Claudio J. Oton ◽  
Zeno Gaburro ◽  
Mher Ghulinyan ◽  
Nicola Daldosso ◽  
Lucio Pancheri ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Light Scattering ◽  
Porous Silicon ◽  
Direct Measurement ◽  
Optical Anisotropy ◽  
Oblique Incidence ◽  
Laser Light ◽  
Anisotropic Scattering ◽  
Scattering Measurements

AbstractWe report the observation of strongly anisotropic scattering of laser light at oblique incidence on (100)-oriented porous silicon layers. We performed angle-resolved light scattering measurements and three concentric rings were observed. Modeling porous silicon by means of nanometric columnar air pores and an effective anisotropic uniaxial dielectric constant explains the observed phenomenon, and besides, the observation of the angle aperture of these rings allows a direct measurement of relative birefringence. We finally study the changes of optical anisotropy after different modifications of the structure.

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