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retinas
Tyrosine kinase activity in the ROS from bleached retinas is by 30% lower than in the dark-adapted ROS.
      
Prolonged illumination (60 min) of the dark-adapted ROS restores the tyrosine kinase activity to the level of ROS from the bleached retinas.
      
Correlation retinas measure the correlation product of an image projected on a sensor by optical means and a function f(x, y) stored in the retina.
      
The effects of nitric oxide (NO) on electroretinograms and light responses of horizontal cells intracellularly recorded from isolated, superfused carp retinas were studied.
      
Induction of glutamine synthetase (GS) by cortisol has been shown to occur in monolayer cultures of cells obtained by enzymatic dissociation of retinas from 8- and 12-day-old chick embryos with papain (0.1%) or trypsin (0.25%).
      
Inducibility of glutamine synthetase in whole retinas and retinal monolayers prepared with either trypsin or papain also decreased with time in culture.
      
For whole and trypsin-dissociated retinas, the drop in inducibility correlates with a drop in cortisol-binding capacity.
      
Glutamine synthetase in cultured whole retinas from the embryonic chick
      
Glutamine synthetase (GS) activity is enhanced in cultured whole retinas when a 72 h incubation at 37°C is preceded by storage at 4°C for 2-24 h.
      
This enhancement occurs even in the absence of glucocorticoids and is maximal in retinas from 11 to 14 d embryos.
      
In comparison, cortisol-induced increases in retinal GS activity at 37°C are optimal in retinas from 8 to 12 d embryos.
      
The rod photoreceptors of vertebrate retinas contain a cGMP phosphodiesterase (PDE) that is activated by light.
      
Treatment of early postnatal retinas with bFGF increased the binding activity in nuclear extracts and caused a shift in migration of the retarded band to a position characteristic of the embryonic form of the complex.
      
FGFR4 mRNA was present within fractions of the outer and inner nuclear layers isolated from adult rat retinas, and could also be detected in pure photoreceptor cultures prepared from young rat retinas.
      
Vertebrate retinas are highly enriched in long-chain polyunsaturated fatty acids (PUFA), especially docosahexaenoic acid (22:6n-3, DHA).
      
Total lipids from rat retinas incubated with [3H]-glycerol were analyzed.
      
Unlike what was observed with frog retinas, relative larger of amounts of di-22:6 molecular species were synthesized de novo.
      
In both rat and frog retinas, there was synthesis of glycerolipid molecular species containing two PUFA (one of which was 22:6) in larger amounts than predicted by their steady-state mass levels.
      
GH immunoreactivity, to a 22-kDa protein, was present in extracts of fetal (embryonic day [ED]17) eyes and in extracts from the neural retinas of newborn pups, comparable to GH immunoreactivity in pituitary extracts.
      
A 693-bp cDNA was also generated by the RT-PCR of RNA extracted from the eyes of ED17 rats and from the neural retinas and eyes of newborn rats, when amplified in the presence of oligonucleotide primers for the rat GH cDNA.
      
 

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