منابع مشابه
Are Sale Signs Less Effective When More Products Have Them?
We analyze data from a variety of sources, including historical data from a women’s clothing catalog, a field study in that catalog, survey responses to catalog stimuli, and grocery store data for frozen juice, toothpaste, and tuna. The analysis yields three conclusions. First, sale signs are less effective at increasing demand when more items have them. Second, total category sales are maximiz...
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All blood cells possess inherited antigens; their pattern is specific for any individual or groups of individuals, and remains constant throughout life. Although the majority of the antigens were first recognized in association with blood cells, it is now evident that many of them are also found in other tissues and in body fluids, and specific antigens have been demonstrated in plasma. Antibod...
متن کاملTransfusion of blood and blood products.
The indications for transfusion in surgical practice are as follows. 1) Following traumatic incidents where there has been severe blood loss, or haemorrhage from pathological lesions, for example from the gastrointestinal tract. 2) During major operative procedures for example abdominoperineal or cardiovascular surgery. 3) Following severe burns where, there may be associated haemolysis. 4) Pos...
متن کاملRational use of blood and blood products.
During tlie Spring of 1987 the author had the privilege of visiting the Pathology Depart*.? ment of the University of Malaya in Kuala Lumpur and was able t o witness many aspects of local clinical practice involving blood therapy including heart surgery and bone marrow transplantation. It is acknowledged that the demographic situation in Malaysia differs considerably from that in Scotland; neve...
متن کاملFrom Deficit to Surplus : An Econometric Analysis of US T rode Balance in Forest Products
Ahhough the US trade deficit hm penited sinm 1975, the collllry changed in 2009 from a net iqiorter to a net exporter of forest produits, emerging as 1he wurld's largest exporter of forest produits. Drawing on recent dato, we model the real dollar Vlllue of US exports, imporb, and the trade balanm in forest pnxluds ta identify fadors likely to explain tlis shift. We find that US dollar deprecia...
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ژورنال
عنوان ژورنال: Nature
سال: 1981
ISSN: 0028-0836,1476-4687
DOI: 10.1038/292664b0