Intrinsic Deterioration

Intrinsic deterioration The type of deterioration that occurs due to respiration or the metabolic activity of the grain. It is called intrinsic because the grain self-... 

The principal functions of food packaging are to protect the food contents from physical damage, losses, or deterioration, and to faciUtate distribution from processor to consumer. Food packaging also must attractively identify the product and must perform these functions at minimum system cost because the package itself has no intrinsic value to the consumer. In 1992, food packaging represented about 57% of the United States more than 70 biUion packaging industry. 

Velocity Most metals and alloys are protected from corrosion, not by nobility [a metal s inherent resistance to enter into an electrochemical reaction with that environment, e.g., the (intrinsic) inertness of gold to (almost) everything but aqua regia], but by the formation of a protective film on the surface. In the examples of film-forming protective cases, the film has similar, but more limiting, specific assignment of that exemplaiy-type resistance to the exposed environment (not nearly so broad-based as noted in the case of gold). Velocity-accelerated corrosion is the accelerated or increased rate of deterioration or attack on a metal surface because of relative movement between a corrosive fluid and the metal surface, i.e., the instability (velocity sensitivity) of that protective film. 

The synthetic data have been obtained by adding random noise with standard deviation of about 0.4 )0.g 1 to the theoretical plasma concentrations. As can be seen, the agreement between the estimated and the computed values is fair. Estimates tend to deteriorate rapidly, however, with increasing experimental error. This phenomenon is intrinsic to compartmental models, the solution of which always involves exponential functions. 

Asymmetric autocatalysis has the following intrinsic merits (1) the efficiency is high because the process is automultiplication (2) in an ideal asymmetric autocatalysis, no decrease in the amount of catalyst and no deterioration of the catalytic activity should be observed because the amount of catalyst increases during the reaction and (3) there is no need to separate the catalyst from the product because their structures are identical. Frank proposed a kinetic model of asymmetric autocatalysis without mentioning a specific compound or reaction." ... 

Equations (67) and (68) show that the efficient columns available today tolerate much smaller sample sizes than the columns used a few years ago. Wlicicua lui culuiiiiis With t>p - 25 fiin, h = 5, and /V - 200U tlic maximum permissible sample volume Vs,m is about 60 /xl. tne microparticulate columns can accept samples of only a few microliters without deterioration of the intrinsic column efficiency. 

Composite propellants consist of an oxidizer (AP/AN/ADN), a metallic fuel such as Al, Mg etc and a binder, usually a polymer which also serves as a fuel. Vacuum stability tests (VSTs) suggest that composite propellants are intrinsically more stable than SB, DB and propellants. However, use of more exotic ingredients such as oxidizers (ADN and hydrazinium nitroformate, HNF), binders [poly([NiMMO)] and poly([GlyN)] are likely to introduce severe compatibility-related problems [30, 31]. Some recent research in this direction indicates that stability of such propellants is largely determined by the chemical and mechanical properties of propellants. However, early evidence of deterioration generally comes from a change in their mechanical properties rather than from chemical investigations [32]. 

In most experimental studies, there are two sources of variation or error. The first arises from the intrinsic variability in individual measurements or observations that are all obtained in the same way. The second arises from errors in the apparatus or procedures which affect all of the measurements in a similar way. This type of variation, which leads to a consistent deviation from the correct or true measurement is termed systematic error. It is important that these two sources of error are clearly distinguished. The first (intrinsic variability) can be analysed statistically, and replicated measurements will give an estimate of the precision of the measurement or procedure. These errors are termed statistical errors. This does not mean, however, that the result obtained is necessarily an accurate or true one. Pipettes may have become uncalibrated, or solutions have deteriorated there are many ways in which systematic errors can lead to false values, and attention to calibration and independent verification of apparatus or procedures is essential to minimise the risk of this happening. Systematic errors are potentially much more problematic in biochemical work, since these can easily occur without the experimenter being aware of them. 

Damage to oils during storage, and the resulting loss in quality and yield, can occur because of deterioration-adverse chemical changes caused by the intrinsic nature of oils contamination from natural substances associated with the source of the oil, traces of pesticides, and that introduced by oil processing or in transit and adulteration-deliberate admixture of one oil with another. 

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