Tolerance general principles

The advantages of low-level hoods are listed in Table 13.17. The first step is to verify that the general principle of local capture of emissions is acceptable and feasible for the process. The next step is to establish the most efficient hood geometry. In most cases, this involves a balancing of the degree of process interference tolerable against the degree of emission source enclosure required. 

It is not the intention here to consider in detail the subject of boiler feed-water conditioning and treatment for nuclear plant, but the general principles may be noted. Essentially, the same objectives apply as in fossil-fuelled plant, embodied in the three aims to minimise corrosion, deposition and steam-carryover. Requirements are more stringent in nuclear plant because there is no possibility of repairing tubes which have failed, let alone those which have suffered either deposition or corrosion. Again, certain tubes in nuclear plant have very modest design corrosion allowances so that only minimal loss of thickness from any cause can be tolerated. 

There are several aspects of different environmental stresses that either have common features or the plant responses or adaptations to those stresses may have common components or indicate general principles. It is an objective of this volume to identify such features where they exist so as to help in the development of stress-tolerant crop plants by making the best use of the newer techniques of molecular biology. Particular examples will be discussed in more detail in succeeding chapters. 

Technical Drawings—Dimensioning-General Principles, Definitions, Methods of Execution, and Special Indications Pipe Threads Where Pressure-Tight Joints are Not Made on the Threads—Part I Designation, Dimensions and Tolerances ... 

With these general principles of shrinkage and porosity in mind that apply to most ceramic processes, we proceed to the specific processing methods by examining some of the oldest materials processing techniqnes known, and we progress throngh time and technical difficulty to cnrrent techniqnes that prodnce complex components of incredible purity and dimensional tolerances. 

There are a few exceptions to this generalization, however. Legitimate retrospective analysis of the database of a clinical trial that has been previously published in full sometimes can make an isolated abstract, provided the full reference is provided, and an educated audience at, say, an academic conference, will be aware of the potential biases of this technique. Similarly, the open-label tolerability extension to a previously published controlled trial might be usefully published as a poster. But these are minor exceptions to the general principle that in order to assess the validity of a clinical trials report, far more detail is needed than... 

As viscosity increases with decreasing temperature, another very important property of the oil is therefore the pour point . This gives an approximate indication of the lowest temperature at which it is usable, depending on the maximum viscosity that can be tolerated in each application. The general principle is not to operate within 10°C of an oil s pour point and also to expect large rises in torque below... 

Peri operative management of these patients can present unique challenges. Table 37.2 provides an overview of the peri-operative management of opioid-tolerant and dependent patients. There are several general principles that help guide the anesthesiologist and pain specialist with peri operative pain management. First and foremost is to imcover the fact that... 

It is impossible to completely eliminate atmospheric corrosion, but it is possible to control the corrosion rate and thereby keep it within tolerable limits. The mechanisms of atmospheric corrosion have been discussed in previous chapters of this book for various materials of construction. This chapter will deal with other aspects of the prevention and control of atmospheric corrosion and with the general principles to be followed in the application of various materials of construction, along with measures to be taken to protect them from atmospheric corrosion. 

Field trial designs differ somewhat from each other in details but follow the same general principles. The GM crop and its control are planted in randomised blocks within a plot, often with three or four rephcate blocks each. Recent studies of herbicide tolerant GM plants have included three treatment groups the control and transgenic plants are treated with conventional herbicides and in a separate block the transgenic plant is sprayed with the herbicide to which it is tolerant (Herman et al, 2004 Oberdoerfer et al,... 

The overall principles for the derivation of a tolerable intake are equal irrespective of chemical class (e.g., food additives, pesticides, veterinary drags, contaminants) although it should be recognized that the available database for chemicals dehberately added to, e.g., food is generally more... 

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