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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 178 (1956), S. 485-485 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The following test was then carried out. Glass spheres having diameters of 0.02 0.06 in. were allowed to fall from a funnel into a polythene beaker 3 in. diameter and 31/4 in. high, the height of fall being 12 in. The polythene beaker was placed within a beaker of 1.litre capacity which acted as a ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 729-730 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the study of the stress-distribution in a granular material the technique in which the whole of the granular mass is represented by a solid block of photo-elastic material, suitably shaped and loaded, has previously been used, the stresses being determ-ined by the conventional methods of ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 813-814 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The rather limited literature relating to the subject appears, in general, to support the view that the major part of the grinding process arises from the sliding which occurs between the mill shell and the charge, and is localized in this region. It would appear to be questionable, however, ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 774-775 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] At the commencement of the test the powder is evenly dispersed in the column of fluid above the reference plane. As the test progresses, the mass of material which has crossed the reference plane is determined, at times t measured from the commencement of the trial, in some way. Consider first a ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 46-47 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] One of these rapid techniques is that which may best be described as the 'single observation photo -extinction method'. Owing, however, to the omission of an important variable, this test gives results which are subject to very considerable error, and it is the object of this communication to ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 169 (1952), S. 287-288 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] For this case the law may be written : lcg1 tfmax. C.I. 0 where C is the concentration of the powder in gm./ cm.8, I the length of the light-path through the suspension, Kx a factor depending upon the particle size and shape, n the number of particles of size dx per gram of powder, dx a ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 216 (1967), S. 1045-1046 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In connexion with research in which we are engaged, it is necessary to study the peaks arising from the transformation of extremely small quantities of material and, in consequence, it is essential that due allowance should be made for the effects of any differences arising from the particle size ...
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 209 (1966), S. 494-496 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Schematic representation of the diflfusional mechanism of solid-solid mixing In a barrel mixer, loaded axially as shown in Fig. la, the observed diffusion is a result of the particles acquiring a component of motion along the axis of the mixer. Figs. 1a and 1b illustrate the shear zone and ...
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 10 (1968), S. 0 
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: In this paper the problem of the evaluation of the grain-size distribution of a spherical granular material embedded in a matrix, upon the basis of the measured distribution of the sizes of the figures formed by the intersection of the grains with a random plane, is discussed and a solution, based upon matrix algebra, is developed.There are no limitations on the method, with respect to the type of particle-size distribution function involved and, in theory, the grain-size distribution may be determined to any desired degree of accuracy by the use of a conversion table.Conversion tables, which are sufficiently comprehensive to give results of worthwhile accuracy in most practical cases, are presented and the necessary calculations can be carried out, without recourse to complicated mathematics, by the use of a slide-rule or a desk calculating machine.If the grain-size distribution must be divided into a number of classes greater than that covered by these tables, then extended tables must be prepared. This can be done, by application of the methods of the present work but evaluation upon a computer, by use of a standard fast-running routine, is then practically unavoidable.The present treatment also leads directly to the number of particles of each size present in a unit volume of compact, this being a figure of technical importance which is not easily established by other methods.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 242 (1973), S. 187-190 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Using a quartz sand from Chatteris, Cambridgeshire, we have studied the effects of grinding for various periods up to 400 h on the d.t.a. peak at 573 C. Samples were prepared in a vibration mill with a steel chamber; d.t.a. traces were recorded at a heating rate of 10 C min-1. Fig. 1 shows that ...
    Type of Medium: Electronic Resource
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