منابع مشابه
Rearing Bumble Bees for Research and Profit: Practical and Ethical Considerations
The commercial production of bumble bee colonies is a multi-million dollar business worldwide. The pollination of greenhouse tomatoes is largely dependent on this industry. However, microparasites are prevalent in many of these colonies and can spread to wild populations of bumble bees. Academic researchers now commonly purchase colonies for their work. I believe that this raises some questions...
متن کاملThe economics of for-profit and not-for-profit hospitals.
This paper examines the economics of for-profit and not-for-profit hospitals through the prism of capital acquisitions. The exercise suggests that of two hospitals that are equally efficient in producing health care, the for-profit hospital would have to charge higher prices than the not-for-profit hospital would, to break even on capital acquisitions. The reasons for this divergence are (1) th...
متن کاملReading for Pleasure
money we had." The distinctive identity and qualities of the individual initiating the message evoke a mental image with a pattern of association that arouses corresponding expectation. In like manner, the growth of biographical writings to a recognised literary species in recent decades reflects the public's appetite for personal record. The brief snatches I present here reflect but the merest...
متن کاملReading for pleasure
The test of a good book, said Lord Snow in a recent television programme, was whether you could remember its content a year later. I am an insatiable reader with a memory like a sieve, so that only the flavour remains-and perhaps a quotation or two in my diary. When I was a boy I used to write precis, but adult laziness has forced me to keep lists only. Why then do I read? It is an obsession, m...
متن کاملMotivations for Pleasure Vacation
Crompton, John L., "Motivations for Pleasure Vacations," Annals of Tourism Research, October/December 1979, VI(4):408-424. The study is concerned with identifying those motives of pleasure vacationers which influence the selection of a destination. It also seeks to develop a conceptual framework capable of encompassing such motives. Empirically nine motives were identified. Seven were classifie...
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ژورنال
عنوان ژورنال: Nature
سال: 1892
ISSN: 0028-0836,1476-4687
DOI: 10.1038/046510a0