absorption index

absorption index

[əb′sȯrp·shən ′in·deks]
(optics)
The complex index of refraction may be written as n (1 + ik); the coefficient k is the absorption index. Also known as index of absorption.
References in periodicals archive ?
The absorption index k, in terms of attenuation factor and phase factor is given as under [1]:
where hv photon energy, a = 4nk / Z = absorption coefficient (k = absorption index or absorbance) and A= constant.
Statistical analyses showed significant differences in various extrudate properties, such as moisture content, water activity, color, bulk density, hardness, water solubility index, water absorption index, expansion ratio, pellet durability index and dietary fiber content.
Water absorption index (WAI) and water solubility index (WSI) were assessed on raw materials and blends before and after extrusion process (ANDERSON et al.
Through the assessment and comparison of different indexes such as transfer factor (TF), enrichment factor (EF), and the absorption index, the ability of Ricinus communis L.
The absorption index is related to the subject thickness, and the composer substance atomic number of the subject.
Extrudates were characterized concerning specific volume (SV), expansion index (EI), water absorption index (WAI), water solubility index (WSI), color and texture.
The researchers used response surface methodology to analyze the effect of die temperature (140 C to 160 C), screw speed (150 rpm to 200 rpm) and pomace levels (2% to 10%) on specific mechanical energy (SME), die pressure, water absorption index (WAI), water solubility index (WSI), gelatinization, in vitro starch digestibility and the glucan content of the extrudates.
The scientists evaluated the dried material for its functional properties, such as rapid viscosity, water absorption index (WAI), water solubility index (WSI) and fat absorption index (FAI).
The investigators characterized the structural changes that the fibers underwent by measuring the water solubility index (WSI), water absorption index (WSI) and bulk density of the extrudates.