Dear friends can any one help me in this content. I need the estimated number of research papers published in life science research in year 207-18.
Not knowing exactly what you're after, here is one example. Go to https://www.ncbi.nlm.nih.gov/pubmed (it's free) and search for "life sciences" with restriction to 1/1/17 - 12/31/17. You get 96,506 publications.
Sorry to diagree: searching for the word life science in PubMed is not the right way to go. If you want to be precise you need to do and advanced search with a "or" of all the Mesh Headings of the different life science fields. Alternatively you can approximate by conisdering that >99% of PubMed publications are in the field of life sciences. In that case you can do a search per year of publication. For example:
("2017"[Date - Publication] : "2017"[Date - Publication])
Which gives you 1'287'563 publications for 2017
You can also do this for a period of time:
("1980"[Date - Publication] : "2017"[Date - Publication])
and then retrieve the CSV of the graph visible in the right side of the screen:
2017,1127725 2016,1106786 2015,1091392 2014,1040969 2013,995309 2012,940058 2011,875300 2010,822604 2009,783814 2008,750860 2007,709902 2006,685764 2005,655954 2004,619510 2003,583495 2002,558257 2001,543180 2000,529696 1999,493173 1998,473950 1997,455797 1996,458248 1995,448629 1994,437954 1993,426287 1992,417533 1991,412802 1990,410500 1989,402327 1988,386623 1987,367600 1986,349317 1985,334941 1984,317944 1983,309194 1982,295334 1981,283345 1980,280435
As you can see there is an exponential growth in the number of papers being published. Even taking into accound the fact that in the period from 1980 to the end of the 90s PubMed was not indexing a lot of papers from non medical fields (like plant biologiy, insects, fish, etc).
Best
Amos
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