Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Procedures references

That Global Approach requires that the proeedures to prove compliance of a product with the essential requirements in New Approach directives should be chosen from amongst nine procedures referred to as modules. These modules range from a procedure which does not involve the intervention of a third party, the manufacturer s own production control, to procedures with full intervention of that party at both levels, at the design and at the manufacturing stage. [Pg.939]

Wet test While an indoor type switchgear assembly requires only a dry power frequency voltage withstand test, the outdoor type switchgear assembly also needs a wet test under wet conditions to check the external insulation. For the test procedure refer to lEC 60060-1. [Pg.424]

Artificial pollution test The purpose of this test is to provide information on the behaviour of the external insulation while operating in polluted conditions. The test may be performed only if thought necessary, depending upon the degree of contamination at the place of installation. For the test procedure refer to IFC 60060-1. [Pg.424]

This is an alternative to the ageing test and is applicable for shunt capacitors of 1000 V and above. It is an in-house process test and is carried out on the capacitor elements before they are assembled into a capacitor unit to ascertain their dielectric stability against repeated overvoltages. For the test procedure refer to lEC 60871-2. [Pg.841]

Additional test on an IPB enclosure for radio interference as in NEMA-107. The maximum radio influence voltage (RIV) should not exceed 100 //V at 1000 kHz. For test equipment and test procedure refer to the Standard. [Pg.953]

The two-stage oxidation described in the present preparation is new and appears to be more convenient than any of the procedures referred to above. [Pg.97]

Often in plant operations condensate at high pressures are let down to lower pressures. In such situations some low-pressure flash steam is produced, and the low-pressure condensate is either sent to a power plant or is cascaded to a lower pressure level. The following analysis solves the mass and heat balances that describe such a system, and can be used as an approximate calculation procedure. Refer to Figure 2 for a simplified view of the system and the basis for developing the mass and energy balances. We consider the condensate to be at pressure Pj and temperature tj, from whence it is let down to pressure 2. The saturation temperature at pressure Pj is tj. The vapor flow is defined as V Ibs/hr, and the condensate quality is defined as L Ibs/hr. The mass balance derived from Figure 2 is ... [Pg.494]

As process plants become more complex, it becomes apparent that it is not possible to rely exclusively on the process worker s skills and memory required to perform the task. Job aids and procedures are devices which aim to reduce the need for human retention of procedures and references as well as the amount of decision making required. Job aids assume a variety of formats including flowcharts, checklists, decision tables, etc., while procedures refer to other systems of documentation such as standard operating instmctions and emergency procedures. [Pg.122]

For scale-up procedure, refer to Figure 5-31, w hich outlines the steps involved in selecting commercial or industrial mechanical agitation equipment when based on test data. [Pg.315]

Redrying Procedure Reference Method ft Loss in weight, % HaO... [Pg.44]

The reaction proceeds with high regioselectivity for oxidation at the less substituted a-carbon. Methanol is commonly used as the solvent, although higher alcohols are also used for some detailed experimental procedures refer to the literature60,61. Some examples of compounds prepared via electrochemical alkoxylation are ... [Pg.814]

European Council (2008) Common Position (EC) No 3/2008 of 20 December 2007 adopted by the council, acting in accordance with the procedure referred to in Article 251 of the treaty establishing the European community, with a view to the adoption of a directive of the European Parliament and of the council on environmental quality standards in the field of water policy and amending directives 82/176/EEC, 83/513/EEC, 84/156/EEC, 84/491/EEC, 86/280/EEC and 2000/60/EC. Official Journal of the European Communities, p 1-15... [Pg.165]

V. Procedure Refer to Chemical Education Resources, Modular Laboratory Program in... [Pg.274]

The determination of the orthophosphate was carried out by using the automated systems described by the Technicon Instruments Corporation. The manifolds used are shown in Fig. 12.3. The procedures referred to below as methods I and II are Technicon industrial methods Nos. 94-70W and 155-71W, respectively. Method I includes ascorbic acid alone for the reduction of the molybdophosphoric acid whereas in method II the mixed reagents ascorbic acid, sulphuric acid, ammonium molybdate and antimony potassium tartrate are used. Method I is intended for use for high levels of phosphorus (up to lOpg ml4) and method II for low levels (less than 0.5pg ml4). The wetting agent (Levor IV) used in order to obtain a smooth bubble pattern, is present in the ascorbic acid reagent line for method I whereas it is added externally Fig. 12.3) in the water line (0.5pg ml4 of Levor) in method II. [Pg.334]

We underline these results and the implied concepts quoting from a comprehensive review on this subject (Simon 1983). We remember indeed that, ever since it was experimentally possible to determine atomic distances in molecules and crystals, efforts have been made to draw conclusions about the nature of the chemical bonding, and to compare interatomic distances (dimensions) in the compounds with those in the chemical elements. Distances between atoms in an element can be measured with high precision. As such, however, they cannot be simply used in predicting interatomic distances in the compounds. In a rational procedure, reference values (atomic radii) have to be extracted from the individual (interatomic distances) measured values. Various functions have been suggested for this purpose. In the specific case of the metals it has been pointed out that interatomic distances depend primarily on the number of ligands and on the number of valence electrons of the atoms (Pearson 1972). [Pg.238]

Justification for evaluation under the Centralized Procedure (refer to Parts A and B Products designation)... [Pg.256]

Experiments 5-9 are performed to check the wavelength at 357nm by injecting an anthracene standard. This test is only required if the user intends to run the detector above 300nm. Eor a description of the procedure, refer to subsection (ii) of Detector in section (j) of the OQ guidelines. [Pg.329]

As shown in Fig. 22, the resulting procedure, referred to as a multi-block experiment, produces a two-dimensional data set, such as an array of FIDs (its exact nature depends upon the signal acquisition method). The data of each x-block are then reduced to a single quantity, S(t) which should be proportional either to the total sample magnetization Ma(x) or to one of its components. Since the vertical scale of the relaxation curve is irrelevant, we can identify S(t) with Ma(x) at the exact time of detection (usually just after the first excitation pulse). [Pg.442]

The principles of good clinical practice and detailed guidelines in line with those principles shall be adopted and, if necessary, revised to take account of technical and scientific progress in accordance with the procedure referred to in Article 21(2). [Pg.831]

Member States shall take all appropriate measures to ensure that the qualified person referred to in Article 21 of Directive 75/319/EEC, without prejudice to his relationship with the manufacturer or importer, is responsible, in the context of the procedures referred to in Article 25 of the said Directive, for ensuring ... [Pg.840]

Fitting model predictions to experimental observations can be performed in the Laplace, Fourier or time domains with optimal parameter choices often being made using weighted residuals techniques. James et al. [71] review and compare least squares, stochastic and hill-climbing methods for evaluating parameters and Froment and Bischoff [16] summarise some of the more common methods and warn that ordinary moments matching-techniques appear to be less reliable than alternative procedures. References 72 and 73 are studies of the errors associated with a selection of parameter extraction routines. [Pg.268]

Some of the linear combinations will be well defined and others poorly defined. The latter may be eliminated in a filtering procedure, referred to in the literature under the names characteristic value filtering, eigenvalue filtering, and principal component analysis. If the parameter set is not homogeneous, but includes different types, relative scaling is important. Watkin (1994) recommends that the unit be scaled such that similar shifts in all parameters lead to similar changes in the error function S. [Pg.79]

Cook (Ref 17, p 36) designates the available energy as A, and states that this property, as well as the heat of explosion Q, and the ratio A/Q are the important quantities determining the total blast or "avaiable work potential or "available energy . The theory is presented in Chapter 11 of Ref 17, pp 265ff and is considered more reliable than experimental procedures, at least for CHNO expls. The experimental procedures referred to by Cook for determination of (A) include Trauzl Block Test and Ballistic Mortar Test. New methods have been proposed, such as determination of peak pressure or/and total energy ... [Pg.476]

Note Use of cyanide. Handle in a well-ventilated fume hood and use appropriate disposal procedures. Refer to MSDS. [Pg.109]

To evaluate the safety aspects of a drug intended for use in food-producing animals, multistep procedures have to be applied. A major portion of these procedures refer to toxicity studies. Over the last 30 years, a broadly accepted package... [Pg.299]

The products are subject to safety testing as per in-house procedure (refer to the relevant procedure). [Pg.406]

For more detailed extraction procedures, refer to articles in Literature Cited. [Pg.398]

Two protocols are presented for non-Newtonian fluids. Basic Protocol 1 is for time-independent non-Newtonian fluids and is a ramped type of test that is suitable for time-independent materials. The test is a nonequilibrium linear procedure, referred to as a ramped or stepped flow test. A nonquantitative value for apparent yield stress is generated with this type of protocol, and any model fitting should be done with linear models (e.g., Newtonian, Herschel-Bulkley unithit). [Pg.1143]

An alternative method for tracking the chemical history is encoding by spatial address. The identity of each entity is defined by its spatial address. A one-dimensional directed split-and-pool procedure, referred to as necklace coding, has been developed for synthesis carried out on SynPhase Crowns and Lanterns.13 Individual supports are strung on a Teflon thread and the position of a particle on the thread (necklace) encoded the previous chemical history (Fig. 1). A similar concept was later reported by Furka and co-workers14,15 Two-and three-dimensional encoding of the directed split-and-pool synthesis platform has been patented by Selectide Corp.16... [Pg.116]

Ongoing evaluation periodic review intervals Use of project validation plans Support programs and procedures Reference documents and definitions... [Pg.580]

Support programs/procedures Reference documents Authorities/responsibilities Resource plans and target end dates... [Pg.581]


See other pages where Procedures references is mentioned: [Pg.543]    [Pg.491]    [Pg.185]    [Pg.76]    [Pg.263]    [Pg.7]    [Pg.925]    [Pg.474]    [Pg.83]    [Pg.604]    [Pg.840]    [Pg.842]    [Pg.83]    [Pg.94]    [Pg.29]    [Pg.131]    [Pg.147]   
See also in sourсe #XX -- [ Pg.168 ]




SEARCH



© 2024 chempedia.info