منابع مشابه
on the comparison of keyword and semantic-context methods of learning new vocabulary meaning
the rationale behind the present study is that particular learning strategies produce more effective results when applied together. the present study tried to investigate the efficiency of the semantic-context strategy alone with a technique called, keyword method. to clarify the point, the current study seeked to find answer to the following question: are the keyword and semantic-context metho...
15 صفحه اولNew fears on sea-level rise
new cubs. Previous research has already shown that unstable ice can result in failures of on-ice denning attempts. Less ice than is suitable for denning apparently has led to an increased frequency of pregnant polar bears in this region choosing to den on land, " says Fischbach. Unlike other temperate and Arctic bear species that hibernate during winter months, polar bears remain active and sea...
متن کاملNew mad cow fears
German, Finnish, Lithuanian and Swedish laboratories has recently described the various forms of hantaviruses, which cause respiratory diseases, that infect small rodents in eastern Europe. Hantaviruses can pass to humans, particularly forest workers and farmers whose work brings them into contact with these animals. A particularly virulent form has been found in the Balkan states in Europe whi...
متن کاملNew source of fish fears.
Clonogenic survival of HeLa, Chinese hamster and HaK cells after treatment with a range of cisplatin concentrations and exposure times was determined and cellular platinum concentrations were measured by PIXE. It was demonstrated that cisplatin cytotoxicity of the three cell lines varied considerably as a function of drug exposure dose. These differences are related to differential cellular dru...
متن کاملNew embryo research sparks fears
The news that thousands of women at risk of giving birth to sick children could benefit from a revolutionary technique to ensure that their babies are free from genetic disorders hit the headlines in Britain last month where the technique was developed. Five women in the country are pregnant after having their embryos tested using the technique, which can screen out the genes for common disorde...
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ژورنال
عنوان ژورنال: Nature
سال: 1989
ISSN: 0028-0836,1476-4687
DOI: 10.1038/338610b0