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Studies on the Fatty Liver Diseases of Sciaenops ocellatus Caused by Different Ether Extract Levels in Diets
      
An experiment was conducted to study fatty liver disease caused by different ether extract levels in diets of juvenile Sciaenops ocellatus.
      
Nine kinds of diets containing different protein (38, 42, 46%) and ether extract levels (4, 8, 12%) were used.
      
Results showed that the relative growth ratio and survival ratio of the fish fed on medium lipid diets (8%) or high ether extract diets (12%) were significantly lower than those of the fish fed on low ether extract diets (4%) (p >amp;lt; 0.05).
      
There was a positive correlation between the ether extract contents in hepatopancreas of fish and the ether extract contents of diets.
      
Study results indicated that all the nine kinds of diets with different lipid or protein levels could cause nutritional fatty liver disease in juvenile S.
      
The pathological severity and serious level of fatty liver disease in the tested fish positively correlated with the contents of the ether extract, but not with those of protein, in test diets.
      
The increase in the level of ether extract in test diets was responsible for the direct cause of illness or death in juvenile S.
      
Decapods predominate in the diets of all fish age groups.
      
Diets of periphytonic invertebrates in a small river
      
Potential food accessibility in the periphyton has been estimated, and diets of 13 invertebrate species typical of lithorheophilic biocenoses have been compared.
      
Data on the numbers and biomass of caddis fly species (Trichoptera) in the benthos and in the diets of fish from streams of the Pechora-Ilych State Reserve (the northern Urals) are provided.
      
In the diets of grayling and juvenile Atlantic salmon caught in the rivers of the reserve, 17 and 10 species of caddis flies have been identified.
      
The study of the gut content of several bombyliid species revealed sex-related differences in their diets: the females consumed much more pollen than males.
      
Based on the morphology and contents of their digestive tracts, it is assumed that the representatives of the genera studied are predators with diverse diets.
      
Prepared in this experiment were six groups of diets, i.e.
      
It is, therefore, suggested that vitamin C (100-400 mg(100 g)-1 diets) could be used as an immunostimulant of P.
      
A study on the meat and bone meal and poultry by-product meal as protein substitutes of fish meal in practical diets for Litopen
      
The basal diets were formulated with 22% fish meal and other ingredients which provided about 40% protein and 9% lipid in the diet.
      
The experimental diets included MBM or PBM to replace 0, 20%, 40%, 60% and 80% of total fish meal respectively.
      
 

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