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ciba foundation colloquia on ageing old age aging animals growth amp development longevity of english thoroughbred horses 47 progeny in samples a and b of parents 16 years old or over 154 lives were obtained with e 16 45 0 62 years which is less than any of the three global means but not sig nificantly so these results taken as a whole seem to afford no good evidence of any consistent effect of parental age on the longevity of mares loo 9 progeny of stallions hermit galorn amp hampton all 412 0 0 0 sire20 yrs 121 fig 3 survival curves of lifetime brood mare rj52rn.jpg

ciba foundation colloquia on ageing old age aging animals growth amp development human red cell instability and senescence 219 but depends upon the previous treatment of the cells it increases with the length of time the cells have been stored in vitro and decreases with the number of times they have been washed the effect of repeated suspensions in 0 16 m nacl is shown in fig 1 even after 20 washes only 6 per cent of the cells have haemolysed and the proportion haemolysing was con stant for each washing during the first 7 washes however 10 20 30 40 50 time minutes 60 fi rj52w5.jpg

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ciba foundation symposium on drug resistance in micro organisms mechanisms of development drug resistance in microorganisms 310 p alexander s f cousens and k a stagey coil up the molecule see table iv and only after very exten sive reaction is there a fall in molecular weight this will be discussed on p 315 with a monofunctional reagent such reagent esterification 5 49 2200 1950 phenylalanine mustard 20 o bisepoxypropyl ether 42o 920 875 300 6 sin 72 fig 8 light scattering plots the reciprocal of the scattering at each angle is plotted as a function of that a rj51mr.jpg

ciba foundation simposio sobre las radiaciones ionizantes y el metabolismo celular radiacion efecto fisiologico el metabolismo celular radiacion efectos la radiactividad 64 j a c butler en el hecho de que la desnaturalizacion termica ocurre mas facilmente despues de la irradiacion fig 4 este efecto se produce tanto en solucion y en estado solido ya que tambien ha sido encontrado por cox y colaboradores 1955 por la curva de titulacion que el tratamiento con rayos x loo 90 80 70 c 60 i i 50 s 40 30 20 bajo 20 30 40 50 60 70 80 90 ioo temperatura c fig 4 efecto de la irradiacion en la temperatura necesaria para desvirtuar el adn en 0 01 por rj53a2.jpg

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