Refine My Results

Creation Date 

1. Before 1957  (19,604)
2. 1957 To 1972  (84,826)
3. 1973 To 1988  (268,107)
4. 1989 To 2005  (1,106,119)
5. After 2005  (2,126,383)
6. More options 

New Records 

1. New From Last Week  (40)
2. New From Last Month  (1,100)
3. New From Last 3 Month  (2,156)
4. More options 

Resource Type 

1. Articles  (3,570,651)
2. Book Chapters  (16,929)
3. Books  (6,050)
4. Conference Proceedings  (4,299)
5. Patents  (1,903)
6. Reviews  (774)
7. magazinearticle  (606)
8. Journals  (286)
9. Thesises (postgraduate)  (100)
10. Reports  (39)
11. Web Resources  (34)
12. Text Resources  (33)
13. References  (18)
14. Other  (3)
15. Government Documents  (1)
16. Videos  (1)
17. Archival Material / Manuscripts  (1)
18. More options 

Subject 

1. Science & Technology  (2,761,910)
2. Life Sciences & Biomedicine  (2,018,897)
3. Humans  (1,380,894)
4. Male  (843,264)
5. Female  (790,280)
6. Animals  (762,869)
7. Biological And Medical Sciences  (687,223)
8. Physical Sciences  (569,497)
9. Adult  (452,040)
10. Middle Aged  (429,473)
11. Medical Sciences  (427,027)
12. General Medicine  (390,971)
13. Aged  (330,609)
14. Fundamental And Applied Biological Sciences. Psychology  (296,123)
15. Technology  (292,355)
16. Chemistry  (256,383)
17. Exact Sciences And Technology  (244,070)
18. Biochemistry  (238,603)
19. Biochemistry & Molecular Biology  (233,914)
20. Mice  (231,314)
21. More options 

Databases 

1. MEDLINE  (2,140,555)
2. ProQuest Central  (1,203,156)
3. GFMER Free Medical Journals  (893,851)
4. PubMed Central  (699,358)
5. DOAJ Directory of Open Access Journals  (614,910)
6. ROAD: Directory of Open Access Scholarly Resources  (499,205)
7. HighWire Press (Free Journals)  (341,436)
8. Wiley-Blackwell Open Access Titles  (244,796)
9. Springer Nature OA/Free Journals  (169,729)
10. ProQuest One Psychology  (114,740)
11. Nature Open Access  (97,849)
12. Freely Accessible Japanese Titles  (85,862)
13. JSTOR Early Journal Content  (65,031)
14. IngentaConnect Free/Open Access Journals  (60,819)
15. Public Library of Science (PLoS)  (56,881)
16. Wiley-Blackwell AGU Digital Library  (44,498)
17. Oxford Journals Open Access Collection  (38,254)
18. Hyper Article en Ligne (HAL) (Open Access)  (36,290)
19. IOP Publishing Free Content  (31,295)
20. AgriKnowledge（アグリナレッジ）AGROLib  (30,757)
21. More options 

Language 

1. English  (3,311,637)
2. Portuguese  (5,299)
3. German  (4,535)
4. French  (3,920)
5. Norwegian  (1,387)
6. Russian  (1,147)
7. Chinese  (997)
8. Spanish  (586)
9. Persian  (294)
10. Dutch  (269)
11. Italian  (233)
12. Ndongo  (174)
13. Czech  (147)
14. Slovak  (112)
15. Polish  (94)
16. Turkish  (82)
17. Latin  (74)
18. Arabic  (67)
19. Korean  (66)
20. More options 

Journal Title 

1. Angewandte Chemie  (14,201)
2. Journal Of Biological Chemistry  (18,206)
3. Journal Of Geophysical Research  (19,754)
4. Nature Communications  (17,967)
5. Plos One  (45,951)
6. Proceedings Of The National Academy Of Sciences  (37,948)
7. Proceedings Of The National Academy Of Sciences - Pnas  (38,944)
8. Scientific Reports  (31,905)
9. The Astrophysical Journal  (14,950)
10. The Journal Of Biological Chemistry  (18,406)
11. More options