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Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1783 1
1786 1
1792 1
1796 1
1797 1
1799 4
1801 2
1802 1
1804 1
1809 2
1811 2
1814 2
1818 1
1821 1
1828 2
1829 1
1830 3
1831 5
1833 1
1836 1
1838 2
1840 2
1841 1
1842 2
1843 6
1844 6
1845 4
1846 2
1847 3
1848 1
1849 2
1850 6
1851 2
1852 1
1853 2
1854 6
1855 8
1856 3
1857 5
1858 6
1859 4
1860 4
1861 6
1862 3
1863 3
1864 3
1865 1
1866 7
1867 4
1868 2
1869 5
1870 2
1871 4
1872 7
1873 8
1874 3
1875 6
1876 7
1877 9
1878 7
1879 5
1880 12
1881 13
1882 7
1883 8
1884 10
1885 16
1886 8
1887 10
1888 6
1889 18
1890 12
1891 8
1892 8
1893 10
1894 4
1895 11
1896 11
1897 11
1898 23
1899 17
1900 10
1901 15
1902 7
1903 17
1904 6
1905 10
1906 17
1907 8
1908 15
1909 11
1910 15
1911 30
1912 12
1913 15
1914 10
1915 22
1916 7
1917 12
1918 17
1919 21
1920 18
1921 16
1922 14
1923 16
1924 28
1925 24
1926 12
1927 26
1928 14
1929 14
1930 22
1931 15
1932 20
1933 19
1934 13
1935 25
1936 20
1937 20
1938 25
1939 19
1940 33
1941 52
1942 32
1943 24
1944 35
1945 148
1946 320
1947 309
1948 215
1949 214
1950 271
1951 329
1952 354
1953 369
1954 392
1955 319
1956 398
1957 396
1958 408
1959 505
1960 645
1961 659
1962 690
1963 1033
1964 1207
1965 1069
1966 1221
1967 1343
1968 1487
1969 1576
1970 1844
1971 1836
1972 1714
1973 1681
1974 1728
1975 2302
1976 2325
1977 2216
1978 2296
1979 2419
1980 2325
1981 2353
1982 2435
1983 2778
1984 2879
1985 2952
1986 2949
1987 3130
1988 3244
1989 3832
1990 3884
1991 4087
1992 4006
1993 4033
1994 4384
1995 4283
1996 4738
1997 4663
1998 4898
1999 5491
2000 5983
2001 6987
2002 7210
2003 7654
2004 8086
2005 9272
2006 10049
2007 10384
2008 10886
2009 11177
2010 11664
2011 12840
2012 13678
2013 14148
2014 15538
2015 16276
2016 17158
2017 17579
2018 19014
2019 20760
2020 24955
2021 27295
2022 28090
2023 26016
2024 10391

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432,006 results

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Page 1
The state of ambient air quality in Pakistan--a review.
Colbeck I, Nasir ZA, Ali Z. Colbeck I, et al. Environ Sci Pollut Res Int. 2010 Jan;17(1):49-63. doi: 10.1007/s11356-009-0217-2. Epub 2009 Jul 3. Environ Sci Pollut Res Int. 2010. PMID: 19575252 Review.
A comparison of the levels of these air pollutants with the World Health Organization air quality guidelines was carried out. ...CONCLUSIONS: The current state of air quality calls for immediate action to tackle the poor air quality. ...
A comparison of the levels of these air pollutants with the World Health Organization air quality guidelines was carried out. …
Measuring concentrations of ammonia in ambient air or exhaust air stream using acid traps.
Ndegwa PM, Vaddella VK, Hristov AN, Joo HS. Ndegwa PM, et al. J Environ Qual. 2009 Feb 25;38(2):647-53. doi: 10.2134/jeq2008.0211. Print 2009 Mar-Apr. J Environ Qual. 2009. PMID: 19244485
Strong acid solutions have been widely used in acid traps to determine concentrations of ammonia in ambient air or exhaust air stream. A literature survey indicates the method has a long history and a wide variation in use. ...The results from these series of studie …
Strong acid solutions have been widely used in acid traps to determine concentrations of ammonia in ambient air or exhaust air …
Interpretation of capnography.
Crul JF. Crul JF. Minerva Anestesiol. 1990 Jul-Aug;56(7-8):279-81. Minerva Anestesiol. 1990. PMID: 2126865 Review. No abstract available.
Optical Trap Loading of Dielectric Microparticles In Air.
Park H, LeBrun TW. Park H, et al. J Vis Exp. 2017 Feb 5;(120):54862. doi: 10.3791/54862. J Vis Exp. 2017. PMID: 28190055 Free PMC article.
We demonstrate a method to trap a selected dielectric microparticle in air using radiation pressure from a single-beam gradient optical trap. ...In this protocol, an experimental procedure for selective optical trap loading in air is outlined. First, the experimenta …
We demonstrate a method to trap a selected dielectric microparticle in air using radiation pressure from a single-beam gradient optic …
Characterizing multi-pollutant air pollution in China: Comparison of three air quality indices.
Hu J, Ying Q, Wang Y, Zhang H. Hu J, et al. Environ Int. 2015 Nov;84:17-25. doi: 10.1016/j.envint.2015.06.014. Epub 2015 Jul 18. Environ Int. 2015. PMID: 26197060
Multi-pollutant air pollution (i.e., several pollutants reaching very high concentrations simultaneously) frequently occurs in many regions across China. Air quality index (AQI) is used worldwide to inform the public about levels of air pollution and associat …
Multi-pollutant air pollution (i.e., several pollutants reaching very high concentrations simultaneously) frequently occurs in many r …
Flowmeters.
Loysen P. Loysen P. Health Phys. 1972 Apr;22(4):417. Health Phys. 1972. PMID: 5045212 No abstract available.
Sorbent trapping of volatile organic compounds from air.
Harper M. Harper M. J Chromatogr A. 2000 Jul 14;885(1-2):129-51. doi: 10.1016/s0021-9673(00)00363-0. J Chromatogr A. 2000. PMID: 10941671 Review.
The use of sorbents in trapping volatile organic compounds in air for subsequent analysis is reviewed. Sorbents are classified in accordance with the mechanism used to recover the trapped compounds, either solvent or thermal desorption. The use of sorbents is contrasted wi …
The use of sorbents in trapping volatile organic compounds in air for subsequent analysis is reviewed. Sorbents are classified in acc …
432,006 results
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