Quantitative estimation of phenolic compounds in plant tissues remains uncertain, mainly because those substances are unstable and easily degradable. In this research we have developed and tested a new method for extracting phenolic compounds from sugar maple (Acersaccharum Marsh.) leaves. The research involved three steps: (i) various procedures currently used for extraction of phenolic compounds were tested with five pure phenolic acids; (ii) the extraction solvent, the procedure for dissolving the phenolic compounds, the temperature, and the duration of the treatment were tested on maple leaves; (iii) two methods that were found equally efficient for litter maple leaves were tested on maple leaves collected in June, on barley leaves, and on four pure phenolic acids. Based on those tests, the dissolution of phenolic compounds in 50% aqueous ethanol (v/v) at 40 °C for 3 h appeared to be the most reliable and the least destructive method. We also recommend the use of Polyclar AT, a resin that retains phenolics in solution, to assess the amount of reductive nonphenolic substances present in the plant material analyzed.
New research is presented on the life of James Rennie (1787–1867) before his emigration to Australia in 1840. Though fragmentary and incomplete the results show Rennie as a naturalist of considerable standing and of literary and scientific skill. This new information illustrates an intriguingly marginal life in science of the period. On his personal character caution is exercised, although a thread of dogmatism, determination and self assurance, bordering on arrogance, can be traced from his student days until his departure from Britain. Rennie's early unpublished essays clearly point to his potential as a scientific writer. Rennie's final 27 years in Australia are not covered in any detail because of the lack of documentation about this relatively unknown period of his life outside Britain. A bibliography of his published and unpublished works is given as an appendix, together with notes and new insights into attribution.
Beata qua esurit et sitit justitiam AVING gained permission from the Editor of H BLACKFRIARS to contribute an article on Mrs. Meynell's prose that should, as it were, balance Mr. Osbert Burdett's recent article on her poetry, I find it well to set myself a wide and easy limit, and not attempt to appraise critically her writing, nor to discuss its technique, and only incidentally to settle the question of her " preciosity." I am of Francis Thompson's persuasion,and do not know the body of her writing from its soul, and could love it for its very faults-if such were proved in it-so deeply have the beauties of its virtues ensnared me. My subject, then, is not the prose of Mrs. Meynell, but Mrs. Meynell in her prose, who is its style.
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