1964
DOI: 10.1002/jsfa.2740150606
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Further investigations of chemical concentration gradients in apples

Abstract: Previous results are confirmed. There are high concentrations of minerals in the outer 0.5 mm., a fall to minimum values in the outer cortex, and then again higher values in the core region of apples. Relative to the rest of the tissue, magnesium, calcium and nitrogen are in very high concentration in the peel.If the peel is excluded, alcohol-soluble matter (which is mainly sugar) and starch are the only fractions which showed a steady decrease in concentration from outside to inside.There were no obvious diff… Show more

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Cited by 31 publications
(10 citation statements)
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“…Terblanche et al (1979a, b) compared the concentration gradient of Ca between a fruit with and without bitter pit after storage. A horizontal and vertical dissection of fruit was used to compare this and results confirmed findings of Wilkinson and Perring (1964b). They also confirmed results from Bramlage et al (1979) and Perring (1986) that, early during storage, Ca migrated from the core towards the peel.…”
Section: Introductionsupporting
confidence: 69%
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“…Terblanche et al (1979a, b) compared the concentration gradient of Ca between a fruit with and without bitter pit after storage. A horizontal and vertical dissection of fruit was used to compare this and results confirmed findings of Wilkinson and Perring (1964b). They also confirmed results from Bramlage et al (1979) and Perring (1986) that, early during storage, Ca migrated from the core towards the peel.…”
Section: Introductionsupporting
confidence: 69%
“…In Figure 1, Ca transverse distribution in apples determined by destructive mineral analyses (MA) from averaged data by Perring (1961, 1964a;1964b) on 'COP' (at harvest and after storage) are compared to data from Terblanche et al (1979a;1979b) The correlation between the average Ca concentration per sample from MA and the average Ca concentration of 3 specimen from similar blocks was determined (r = 0.03; P = 0.83) and the relationship is illustrated in Figure 5. The MA results were ranked from lowest to highest Ca concentrations, showing a wide range of values, but did not correlate well with corresponding values derived with PIXE from fruit from the same blocks.…”
Section: Resultsmentioning
confidence: 99%
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“…an equivalent subsample (usually two Because of gradients in mineral composition opposite longitudinal sectors per apple cut along the fruit axis and from the surface from 20 or more apples), (iii) longitudinal inward (Terblanche et al l9l.9a,b, (Perring 1964 For personal use only. (Wilkinson and Perring 1964) was not detected after 10 wk of storage.…”
mentioning
confidence: 82%