Frozen storage during

Control urine should be collected from individuals who have no apparent past history of exposure to the active ingredient. This control urine must be stored frozen until used for field fortification purposes. The urine is then thawed, shaken well, and a certain amount should be aliquoted into a small jar/bottle to use for field fortification. The active ingredient is then added to the urine using a 1-mL volumetric pipet, the solution is shaken well, and the sample is immediately frozen. Occasionally, the fortified sample can be left at room temperature or at some lower temperature in a liquid state to simulate field storage during collection of the urine sample. After leaving the sample at such temperatures for the prescribed length of time, the sample is immediately stored frozen. 

Azoxystrobin residues in crops, soil and water are stable (>80%) during 2 years of frozen storage. 

Famoxadone residues in most crops are stable during 12 months of frozen storage. 

Together with a texture improvement, the penetration of solutes, combined with a dehydration effect, could modify the fruit composition and improve pigment, color, and vitamin retention during frozen storage. 

Soluble solids uptake due to osmotic dehydration, in addition to improving color, aroma, and vitamin stability during both air drying and frozen storage, could also play a very important role in the preparation of new types of ingredients at reduced water activity (Torreggiani et al., 1988). Due to the... 

Tofu can be kept frozen or freeze-dried to prevent microbial deterioration. However intemolecular interactions occur during frozen storage. As a result, the texture of tofu is changed from soft, smooth to sponge-like with a meat-like chewiness. 

It is a fact of practical interest that after four fluetuations, an inerease in the number of fluetuations during simulated frozen storage eaused little further deterioration of potato firmness. These findings provide new insights into the operating parameters of storage of frozen potato and post processing. 

Alvarez, M. D., Canet, W. (1998a). Effect of temperature fluctuations during frozen storage on the quality of potato tissues (cv. Monalisa). Z. Lebensm. Unters. Forsch. A., 206, 52-51. 

Sych, J., Lacroix, C., Adambounou, L. T., Castaigne, F. (1990). Cryoprotective effect of lactitol, palatinit and polydextrose on cod surimi proteins during frozen storage. J. Food Sci, 55, 356-360. 

Sugar alcohols have also found application in foods containing sugars. Sorbitol is an effective cryoprotectant in surimi, preventing denaturation of the muscle protein during frozen storage. 

The stability of sulfonamide residues in animal tissues during frozen storage has been investigated in several studies, most of which dealt with sulfamethazine (2,... 

The effect of cooking on incurred residues of oxfendazole in cattle liver has been also investigated (88). However, the results drawn from this study are inconclusive due to several variable factors. One such factor is the unstable equilibrium between oxfendazole, oxfendazole sulfone, and fenbendazole in the incurred tissue. Other factor is the overall instability of oxfendazole and its metabolites in tissue during frozen storage. Another factor is the variable distribution of the residues within the tissue used for the study and the effect of protein binding on the extractability of the residues from the tissue. It was nevertheless... 

Feyzin, France 1966 Propane Frozen valve during sampling from storage sphere allowed a vapor cloud to form and explode killing 16, injuring 63 UVCE ... 

Berg, L. Vanden. 1961. Changes in pH of milk during freezing and frozen storage. J. Dairy Sci. 44, 26-31. 

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