Refine My Results

Creation Date 

1. Before 1957  (425,520)
2. 1957 To 1973  (995,803)
3. 1974 To 1990  (3,264,391)
4. 1991 To 2008  (8,889,798)
5. After 2008  (16,223,757)
6. More options 

New Records 

1. New From Last Week  (14)
2. New From Last Month  (19,728)
3. New From Last 3 Month  (151,562)
4. More options 

Resource Type 

1. Articles  (27,313,849)
2. Patents  (1,166,403)
3. Book Chapters  (331,330)
4. magazinearticle  (326,112)
5. Conference Proceedings  (274,408)
6. Reviews  (146,128)
7. Books  (58,626)
8. Reports  (22,578)
9. Newspaper Articles  (14,366)
10. Thesises (postgraduate)  (11,347)
11. Videos  (6,837)
12. Web Resources  (6,464)
13. References  (5,444)
14. Newsletter Articles  (4,361)
15. Government Documents  (3,642)
16. Datasets  (1,756)
17. Other  (1,454)
18. Text Resources  (1,157)
19. Images  (1,011)
20. Standards  (967)
21. Journals  (540)
22. More options 

Subject 

1. Science & Technology  (26,167,323)
2. Life Sciences & Biomedicine  (16,538,008)
3. Humans  (7,380,193)
4. Physical Sciences  (6,773,862)
5. Technology  (4,541,781)
6. Female  (3,739,761)
7. Male  (3,718,967)
8. Animals  (3,438,829)
9. Biological And Medical Sciences  (3,209,345)
10. Chemistry  (2,882,459)
11. Physics  (2,842,014)
12. Exact Sciences And Technology  (2,474,940)
13. Engineering  (2,078,724)
14. Adult  (2,046,408)
15. Middle Aged  (1,850,851)
16. Medical Sciences  (1,846,084)
17. Biochemistry & Molecular Biology  (1,713,461)
18. Science & Technology - Other Topics  (1,676,555)
19. Fundamental And Applied Biological Sciences. Psychology  (1,481,756)
20. General & Internal Medicine  (1,407,330)
21. More options 

Author/Creator 

1. Chirikure, Shadreck  (29)
2. National Research Council (U.S.)  (15)
3. Policy and Global Affairs  (9)
4. Wessner, Charles W  (8)
5. National Research Council  (7)
6. National Research Council Staff  (7)
7. National Academy of Sciences Staff  (5)
8. National Research Council (U.S.). Committee on Capitalizing on Science, Technology, and Innovation: An Assessment of the Small Business Innovation Research Program  (5)
9. National Academy of Sciences (U.S.)  (4)
10. National Academy of Sciences  (4)
11. National Academy of Engineering Staff  (4)
12. Institute of Medicine  (4)
13. Board on Science, Technology, and Economic Policy  (3)
14. Division on Engineering and Physical Sciences  (3)
15. National Academy of Engineering  (3)
16. National Academies of Sciences, Engineering, and Medicine; Policy and Global Affairs; Board on Science, Technology, and Economic Policy  (2)
17. Committee for Capitalizing on Science, Technology, and Innovation: An Assessment of the Small Business Innovation Research Pr  (2)
18. Poirier, Carol  (2)
19. Board on Science, Technology and Economic Policy Staff  (2)
20. Charles W. Wessner  (2)
21. Committee on Science, Engineering, and Public Policy  (2)
22. National Academy of Sciences, National Academy of Engineering, Institute of Medicine  (2)
23. Committee for Capitalizing on Science, Technology, and Innovation: An Assessment of the Small Business Innovation Research Program  (2)
24. United Nations Commission on Science and Technology for Development  (2)
25. International Development Research Centre (Canada)  (2)
26. Committee on Capitalizing on Science, Technology, and Innovation: An Assessment of the Small Business Innovation Research Pro  (2)
27. Chirikure, Shadreck  (1)
28. State Science and Technology Commission of the People's Republic of China  (1)
29. Van Ameringen, Marc  (1)
30. Louis, Garrick E  (1)
31. Committee on Challenges for the Chemical Sciences in the 21st Century  (1)
32. More options 

Databases 

1. ProQuest Central  (12,062,072)
2. MEDLINE  (11,126,825)
3. DOAJ Directory of Open Access Journals  (7,888,623)
4. GFMER Free Medical Journals  (7,228,855)
5. PubMed Central  (6,760,530)
6. ROAD: Directory of Open Access Scholarly Resources  (5,958,467)
7. HighWire Press (Free Journals)  (2,541,212)
8. Springer Nature OA/Free Journals  (1,352,750)
9. esp@cenet  (1,125,293)
10. Wiley-Blackwell Open Access Titles  (1,110,480)
11. ProQuest One Psychology  (1,058,963)
12. Nature Open Access  (497,120)
13. IOP Publishing Free Content  (430,185)
14. Hyper Article en Ligne (HAL) (Open Access)  (412,278)
15. IngentaConnect Free/Open Access Journals  (334,714)
16. Public Library of Science (PLoS)  (334,187)
17. Journals@Ovid Open Access Journal Collection Rolling  (317,710)
18. Oxford Journals Open Access Collection  (308,913)
19. JSTOR Early Journal Content  (293,689)
20. Freely Accessible Journals  (288,689)
21. More options 

Language 

1. English  (29,109,126)
2. Japanese  (3,253,756)
3. Chinese  (1,285,939)
4. Portuguese  (219,460)
5. French  (98,754)
6. German  (94,365)
7. Spanish  (74,025)
8. Korean  (59,044)
9. Russian  (47,508)
10. Norwegian  (19,144)
11. Turkish  (17,103)
12. Polish  (12,753)
13. Hungarian  (8,009)
14. Italian  (7,868)
15. Czech  (6,861)
16. Persian  (4,487)
17. Dutch  (4,429)
18. Slovak  (3,966)
19. Croatian  (3,399)
20. Arabic  (3,201)
21. More options 

Journal Title 

1. Bmj  (185,705)
2. British Medical Journal  (122,611)
3. Journal Of The American Chemical Society  (104,014)
4. Nature  (217,486)
5. Plos One  (280,160)
6. Proceedings Of The National Academy Of Sciences - Pnas  (139,056)
7. Scientific Reports  (191,928)
8. The Astrophysical Journal  (112,975)
9. The Journal Of Biological Chemistry  (161,410)
10. The Lancet  (124,211)
11. More options