Trevor Robinson – författare
Visar alla böcker från författaren Trevor Robinson. Handla med fri frakt och snabb leverans.
6 produkter
6 produkter
389 kr
Skickas inom 5-8 vardagar
278 kr
Skickas inom 5-8 vardagar
389 kr
Skickas inom 5-8 vardagar
278 kr
Skickas inom 5-8 vardagar
120 kr
Skickas inom 5-8 vardagar
In Working with the Curlew Trevor Robinson shares his enthusiasm and joy for his work as a shepherd on the moor at Great Whernside in Yorkshire and later as a farmhand near Leominster in Hereford: "A lovely environment, very busy and hard work with no lorries, no electric motors, no tractors, just nature's own sounds." He celebrates the intricate details of traditional farm life: selling rabbits at tuppence each, the village hop, sheep shearing, lambing, shire horses, haymaking, the warm welcome taste of tea on a snow-bound moor, muck spreading, cheese and bread making, trout-tickling, and killing the pig, a quiet job well done. During one severe Yorkshire winter six hundred sheep were lost, and he had to leave the job he loved, 'the call of the curlew was still over two months away, when it came I was not there to hear it'. His new job in Herefordshire brought different skills: hedge laying, ploughing matches, haymaking, chain harrowing and crop rotation, and inevitably, the arrival of tractor and combine harvester.
1 081 kr
Skickas inom 10-15 vardagar
The alkaloids were of great importance to mankind for centuries, long before they were recognized . as a chemical class. The influence they have had on literature is hinted at by some of the quotations I have used as chapter headings. Their influence on folklore and on medicine has been even greater. The scientific study of alkaloids may be said to have begun with the isolation of morphine by Sertiirner in 1804. Since that time they have remained of great interest to chemists, and now in any month there appear dozens of publications dealing with the isolation of new alkaloids or the determination of the structures of previously known ones. The area of alkaloid biochemistry, in comparison, has received little attention and today is much less developed. There is a certain amount of personal arbitrariness in defining "bio chemistry", as there is in defining "alkaloid", and this arbitrariness is doubtless compounded by the combination. Nevertheless, it seems to me that in any consideration of the biochemistry of a group of compounds three aspects are always worthy of attention-pathways of biosynthesis, function or activity, and pathways of degradation. For the alkaloids, treatment of these three aspects is necessarily lopsided. Much has been learned about routes of biosynthesis, but information on the other aspects is very scanty. It would be possible to enter into some speculation regarding the biosynthesis of all the more than 4,000 known alkaloids.