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INVESTIGATIONS ON THE DRYING OF HERBAGE AT TEMPERATURES UP TO 50°C (1974)

Rees, D. V. H.

Oxford, UK : Blackwell Publishing Ltd

Grass and forage science 29 (1974), S. 0

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ISSN: 1365-2494

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Experiments to determine the exposed layer drying rate of cut leaves and stems of a tetraploid (Sabel) and diploid (S23) ryegrass are described. Drying was achieved by passing air through the crop; the changes in weight were monitored continuously. Airflow was fixed throughout the experiments at 37·5 ft/min (0·190 m/s) and the temperatures were controlled in the range 25°C to 50°C. Comparisons were also made of the drying rates at different stages of maturity. Drying curves were determined and moisture content was shown to decay exponentially with time, the relationship approximating closely to a two term exponential.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1365-2494.1974.tb01227.x

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The texture of crystalline polymers: A brief review (1971)

Rees, D. V. ; Bassett, D. C.

Springer

Journal of materials science 6 (1971), S. 1021-1035

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ISSN: 1573-4803

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract This review of polymer texture subdivides the discussion under chainfolding and then morphology. Subsidiary headings include lamellar thickening, theories of crystallisation, solution as well as melt grown materials and fold surface structure. It closes with consideration of extended chain polymers produced by crystallization either at high pressures or under conditions of flow or stress.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00549954

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Crystallization of polyethylene at elevated pressures (1971)

Rees, D. V. ; Bassett, D. C.

New York : Wiley-Blackwell

Journal of Polymer Science Part A-2: Polymer Physics 9 (1971), S. 385-406

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ISSN: 0449-2978

Keywords: Physics ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Notes: The crystallization from the melt of three sharp polyethylene fractions has been studied at 5 kbar. It has been shown that the thickness of so-called extended-chain lamellae is a function of time, temperature, and molecular weight. There is by no means just the fully extended molecular configuration present. Crystallization is qualitatively similar to that of chain-folded crystals at 1 bar, giving an optimum lamellar thickness which increases with time and decreasing supercooling. Fractional crystallization is widespread and is a major cause of disparate lamellar thickness. Isothermal thickening of lamellae during crystallization has been established directly. Morphological detail suggests further that layers can increase their thickness tenfold over their initial size.

Additional Material: 14 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/pol.1971.160090301

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