Rapid Near-Infrared Spectroscopic Method for the Determination of Free Fatty Acid in Fish and Its Application in Fish Quality Assessment

1997 ◽  
Vol 45 (9) ◽  
pp. 3515-3521 ◽  
Author(s):  
Hui-Zhen Zhang ◽  
Tung-Ching Lee
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Quality Assessment ◽  
Near Infrared ◽  
Spectroscopic Method ◽  
Fish Quality ◽  
Infrared Spectroscopic

Validation of a new method for determination of free fatty acid turnover

1987 ◽  
Vol 252 (3) ◽  
pp. E431-E438 ◽  
Author(s):  
J. M. Miles ◽  
M. G. Ellman ◽  
K. L. McClean ◽  
M. D. Jensen
Keyword(s):  
Steady State ◽  
Fatty Acid ◽  
Free Fatty Acid ◽  
Clearance Rate ◽  
Experimental Period ◽  
Metabolic Clearance ◽  
Metabolic Clearance Rate ◽  
State Equations ◽  
Tracer Methods

The accuracy of tracer methods for estimating free fatty acid (FFA) rate of appearance (Ra), either under steady-state conditions or under non-steady-state conditions, has not been previously investigated. In the present study, endogenous lipolysis (traced with 14C palmitate) was suppressed in six mongrel dogs with a high-carbohydrate meal 10 h before the experiment, together with infusions of glucose, propranolol, and nicotinic acid during the experimental period. Both steady-state and non-steady-state equations were used to determine oleate Ra ([3H]oleate) before, during, and after a stepwise infusion of an oleic acid emulsion. Palmitate Ra did not change during the experiment. Steady-state equations gave the best estimates of oleate inflow approximately 93% of the known oleate infusion rate overall, while errors in tracer estimates of inflow were obtained when non-steady-state equations were used. The metabolic clearance rate of oleate was inversely related to plasma concentration (P less than 0.01). In conclusion, accurate estimates of FFA inflow were obtained when steady-state equations were used, even under conditions of abrupt and recent changes in Ra. Non-steady-state equations, in contrast, may provide erroneous estimates of inflow. The decrease in metabolic clearance rate during exogenous infusion of oleate suggests that FFA transport may follow second-order kinetics.

Method transfer of a near-infrared spectroscopic method for blend uniformity in a poorly flowing and hygroscopic blend

2020 ◽  
Vol 180 ◽  
pp. 113054 ◽  
Author(s):  
Bárbara B. Alvarado-Hernández ◽  
James V. Scicolone ◽  
Carlos Ortega-Zuniga ◽  
Andrés D. Román-Ospino ◽  
Yleana M. Colón-Lugo ◽  
...  
Keyword(s):  
Near Infrared ◽  
Spectroscopic Method ◽  
Method Transfer ◽  
Blend Uniformity ◽  
Infrared Spectroscopic
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