منابع مشابه
Copy cats go natural
Cloned mammals have bred naturally for the first time, researchers reported last month, but faced the most trying of times. Two endangered African wildcat clones have each given birth to a litter, a total of eight kittens in all. The first five kittens were born on July 26 to Madge, a clone of the wildcat Nancy. The second litter, consisting of three kittens, was born on August 2 to Caty, also ...
متن کاملGo-no go differentiation to visual stimuli in cats with different early visual experiences.
In a previous paper (1) it was found that in cats deprived from birth of pattern vision with hoods, simultaneous object discrimination was dramatically impaired. In this paper go-no go differentiation is studied in such cats. The specific details of the methodology have been elaborated previously (1). The experiments were performed on 13 cats bred in the laboratory. The 8-th day after the birth...
متن کاملGo-no go avoidance reflex differentiation and its retention after prefrontal lesion in cats.
Cats were trained in a go-no go differentiation of two acoustic stimuli (click versus tone) using the bar-pressing avoidance method. The quality of the conditioned stimuli exerted a clear effect on the rapidity of the avoidance reflex acquisition and on the proportions of short-latency bar-pressing responses executed in positive and in inhibitory trials. Removal of the proreal and orbital gyri ...
متن کاملQuality of stimuli and prefrontal lesions effects on reversal learning in go-no go avoidance reflex differentiation in cats.
Go no go avoidance reflex differentiation of two acoustic stimuli has been previously established in cats. Then the signalling properties of the conditioned stimuli were reversed and the course of acquisition of a new go-no go differentiation was studied in normal cats and in cats with prefrontal lesions. The hypothesis based on stimulus intensity dynamism theory was: (i) in normal cats acqui...
متن کاملA Survey on Natural Language Text Copy Detection
Copy detection has very important application in both intellectual property protection and information retrieval. Currently, copy detection concentrates on document copy detection mainly. In early days, document copy detection concentrated on program plagiarism detection mainly and now the most studies are on text copy detection. In this paper, a comprehensive survey on natural language text co...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2005
ISSN: 0960-9822
DOI: 10.1016/j.cub.2005.09.004