Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My NCBI Filters

Results by year

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

Year Number of Results
1932 1
1939 1
1946 1
1955 1
1963 2
1967 3
1968 5
1969 3
1970 4
1972 2
1973 2
1974 2
1975 9
1976 9
1977 6
1978 13
1979 12
1980 26
1981 24
1982 18
1983 26
1984 23
1985 29
1986 37
1987 46
1988 50
1989 101
1990 88
1991 128
1992 95
1993 70
1994 74
1995 68
1996 83
1997 50
1998 74
1999 73
2000 120
2001 98
2002 93
2003 110
2004 130
2005 172
2006 201
2007 184
2008 217
2009 213
2010 216
2011 234
2012 244
2013 199
2014 175
2015 181
2016 186
2017 243
2018 282
2019 340
2020 327
2021 327
2022 366
2023 342
2024 142

Text availability

Article attribute

Article type

Publication date

Search Results

6,081 results

Results by year

Filters applied: . Clear all
Page 1
Allosteric Modulation of Opioid G-Protein Coupled Receptors by Sigma(1) Receptors.
Pasternak GW. Pasternak GW. Handb Exp Pharmacol. 2017;244:163-175. doi: 10.1007/164_2017_34. Handb Exp Pharmacol. 2017. PMID: 28667477 Review.
Evidence over the past 20 years has established the modulatory effects of sigma(1) ligands on opioid systems. Despite their inability to bind directly to opioid receptors, sigma(1) ligands can modulate opioid analgesia in vivo and signal transduction mechanisms in v …
Evidence over the past 20 years has established the modulatory effects of sigma(1) ligands on opioid systems. Despite their inability …
X(3)sigma(g)(-) b(1)sigma(g)(+) Absorption Spectra of Molecular Oxygen in Liquid Organic Solvents at Atmospheric Pressure.
Bregnhøj M, McLoughlin CK, Breitenbach T, Ogilby PR. Bregnhøj M, et al. J Phys Chem A. 2022 Jun 16;126(23):3839-3845. doi: 10.1021/acs.jpca.2c03053. Epub 2022 Jun 1. J Phys Chem A. 2022. PMID: 35649157
Spectra and absorption coefficients of the forbidden 765 nm X(3)sigma(g)(-) b(1)sigma(g)(+) transition of molecular oxygen dissolved in organic solvents at atmospheric pressure were recorded over a 5 m path length using a liquid waveguide capillary cel …
Spectra and absorption coefficients of the forbidden 765 nm X(3)sigma(g)(-) b(1)sigma(g)(+) transition of molecu …
A Proposal for Six Sigma Integration for Large-Scale Production of Penicillin G and Subsequent Conversion to 6-APA.
Nandi A, Pan S, Potumarthi R, Danquah MK, Sarethy IP. Nandi A, et al. J Anal Methods Chem. 2014;2014:413616. doi: 10.1155/2014/413616. Epub 2014 Feb 24. J Anal Methods Chem. 2014. PMID: 25057428 Free PMC article. Review.
In the current study, we have reviewed and proposed a process for a probable integration of Six Sigma methodology to large-scale production of Penicillin G and its subsequent conversion to 6-aminopenicillanic acid (6-APA). It is anticipated that the important aspect …
In the current study, we have reviewed and proposed a process for a probable integration of Six Sigma methodology to large-scale prod …
Multistate electronic quenching: Nonadiabatic pathways in NO A (2)sigma(+) + O(2)X (3)sigma(g) (-) scattering.
Soulié C, Paterson MJ. Soulié C, et al. J Chem Phys. 2022 Oct 28;157(16):164304. doi: 10.1063/5.0112556. J Chem Phys. 2022. PMID: 36319438
The first one (Q(1)) is a two-step orientation-specific process. The system first undergoes an electron transfer (NO(+) X (1)sigma(+) + O(2) (-)X (2)pi(g)) at short distances, before crossing to lower neutral states, such as NO X (2)pi + O(2)a (1)delta(g), O( …
The first one (Q(1)) is a two-step orientation-specific process. The system first undergoes an electron transfer (NO(+) X (1)sigma(+) …
Photodissociation of S(2) (X(3)sigma(g)(-), a(1)delta(g), and b(1)sigma(g)(+)) in the 320-205 nm Region.
Sun ZF, Farooq Z, Parker DH, Martin PJJ, Western CM. Sun ZF, et al. J Phys Chem A. 2019 Aug 15;123(32):6886-6896. doi: 10.1021/acs.jpca.9b05350. Epub 2019 Aug 2. J Phys Chem A. 2019. PMID: 31322887 Free PMC article.
A pulsed electric discharge in H(2)S produces ground-state S(2) X(3)sigma(g)(-)(v = 0-15) as well as electronically excited singlet sulfur and b(1)sigma(g)(+)(v = 0, 1), and evidence is presented for the production and photodissociation of S(2) a(1)del …
A pulsed electric discharge in H(2)S produces ground-state S(2) X(3)sigma(g)(-)(v = 0-15) as well as electronically excited si …
Solvent and Heavy-Atom Effects on the O(2)(X(3)sigma(g)(-)) O(2)(b(1)sigma(g)(+)) Absorption Transition.
Bregnhøj M, Krægpøth MV, Sørensen RJ, Westberg M, Ogilby PR. Bregnhøj M, et al. J Phys Chem A. 2016 Oct 27;120(42):8285-8296. doi: 10.1021/acs.jpca.6b08035. Epub 2016 Oct 14. J Phys Chem A. 2016. PMID: 27689752
The data recorded were used to calculate rate constants for the O(2)(b(1)sigma(g)(+)) O(2)(X(3)sigma(g)(-)) radiative transition, a parameter that is otherwise difficult to directly obtain from such a wide range of solvents using O(2)(b(1)sigma( …
The data recorded were used to calculate rate constants for the O(2)(b(1)sigma(g)(+)) O(2)(X(3)sigma(g)(-)) radi …
High-Resolution Laser Spectroscopic Survey of the H(3)sigma(u)(-)-X(3)sigma(g)(-) Electronic Transition of Si(2).
Zhu B, Gu J, Yu C, Xiao Z, Chen Y, Zhao D. Zhu B, et al. J Phys Chem A. 2020 Apr 16;124(15):2972-2981. doi: 10.1021/acs.jpca.0c00370. Epub 2020 Apr 2. J Phys Chem A. 2020. PMID: 32204586
Rotationally resolved spectra of the H(3)sigma(u)(-)-X(3)sigma(g)(-) electronic transition bands of Si(2) have been experimentally studied using laser-induced fluorescence in the 380-520 nm range. ...The measured isotopologue spectra of (29)Si(28)Si and (30)S …
Rotationally resolved spectra of the H(3)sigma(u)(-)-X(3)sigma(g)(-) electronic transition bands of Si(2) have been exp …
Diverse mechanisms regulate sporulation sigma factor activity in the Firmicutes.
Fimlaid KA, Shen A. Fimlaid KA, et al. Curr Opin Microbiol. 2015 Apr;24:88-95. doi: 10.1016/j.mib.2015.01.006. Epub 2015 Feb 1. Curr Opin Microbiol. 2015. PMID: 25646759 Free PMC article. Review.
Sporulation allows bacteria to survive adverse conditions and is essential to the lifecycle of some obligate anaerobes. In Bacillus subtilis, the sporulation-specific sigma factors, sigma(F), sigma(E), sigma(G), and sigma(K), activate com …
Sporulation allows bacteria to survive adverse conditions and is essential to the lifecycle of some obligate anaerobes. In Bacillus subtilis …
Exploiting sigma-hole interaction to design small uncharged ligand molecules to stabilize G-quadruplex-DNA: a computational study.
Si MK, Saha A, Ganguly B. Si MK, et al. J Mol Model. 2020 Feb 1;26(2):38. doi: 10.1007/s00894-019-4282-2. J Mol Model. 2020. PMID: 32008146
Small neutral seleno molecules were designed to stabilize G-quadruplex-DNA to accelerate the death of cancer cells. A new approach was considered in this study to design new ligands to stabilize G-quadruplex-DNA using the non-covalent sigma-hole interaction. …
Small neutral seleno molecules were designed to stabilize G-quadruplex-DNA to accelerate the death of cancer cells. A new approach wa …
Sigma-1 receptors and animal studies centered on pain and analgesia.
Davis MP. Davis MP. Expert Opin Drug Discov. 2015;10(8):885-900. doi: 10.1517/17460441.2015.1051961. Epub 2015 Jun 3. Expert Opin Drug Discov. 2015. PMID: 26037105 Review.
Neuropathic injury activates sigma-1 receptors, which results in activation of various kinases, modulates the activity of multiple ion channels, ligand activated ion channels and voltage-gated ion channels; alters monoamine neurotransmission and dampens opioid receptors …
Neuropathic injury activates sigma-1 receptors, which results in activation of various kinases, modulates the activity of multiple io …
6,081 results