introduction: the glutamatergic system plays an important role in learning and memory. administration of crocus sativus (saffron) or its constituent, crocin, facilitates the formation of memory. this research investigated the effect of crocin on antagonizing retrograde amnesia induced by ketamine, a glutamatergic receptor antagonist, in rats by shuttle box. methods:  male wistar rats were teste...

Digging into the history of motivation research, we deduced that, the investigations have targeted individuals’ performance as the overt indication of this invisible drive. Yet, it is hypothesized that there exists a variation of motivation which does not lead to a certain action and is only confined to one’s mental engagement with a concept or activity. To further explicate, we put forward a d...

Across languages, aspectual verbs commonly select for a clausal complement, and they often exhibit transparency to normally clause-bound phenomena, known as ‘restructuring’ behaviors. Language families in which aspectual verbs exhibit restructuring behaviors include Romance (e.g. Aissen and Perlmutter 1976, 1983, Rizzi 1982, Burzio 1986, Cinque 1999, 2003, 2004), Germanic (e.g. Wurmbrand 2001),...

Using a case-control design, the authors studied female residents of five Massachusetts towns between 1983 and 1986. The objective was to measure the associations between breast cancer occurrence and exposure to active and passive cigarette smoke. Until recently, exposure to tobacco smoke has not been thought to cause breast cancer. Novel perspectives on measuring the association of tobacco smo...

The idea of passive euthanasia has recently been attacked in a particularly clear and explicit way by an ‘‘Ethics Task Force’’ established by the European Association of Palliative Care (EAPC) in February 2001. It claims that the expression ‘‘passive euthanasia’’ is a contradiction in terms and hence that there can be no such thing. This paper critically assesses the main arguments for the Task...