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A review of research in distance education indicates that results are consistent in that there is no significant difference in achievement contributable to the delivery system. This "no significant difference" perspective represents a... more
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      Educational TechnologyEducational ResearchCognitive StyleTeaching Methods
Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it increased the rate of weight gain. Unfortunately, this synthetic steroid hormone is not degraded significantly in manure and accumulates in cattle... more
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      ChemistryEcotoxicologyMedicineAdsorption
Oiethylstilbestrol (DES) was used as an ingredient of cattle feed for many years because it increased the rate of weight gain. Unfortunately, this synthetic steroid hormone is not degraded significantly in manure and accumulates in cattle... more
    • by 
    •   20  
      ChemistryEcotoxicologyMedicineAdsorption