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"One-pot" two-step synthesis of aryl sulfur compounds by photoinduced reactions of thiourea anion with aryl halides.

Organic letters

Argüello JE, Schmidt LC, Peñéñory AB.
PMID: 14572267
Org Lett. 2003 Oct 30;5(22):4133-6. doi: 10.1021/ol035545n.

[reaction: see text]. The photoinduced reactions of aryl halides with the thiourea anion afford arene thiolate ions in DMSO. These species without isolation, and by a subsequent aliphatic nucleophilic substitution, S(RN)1 reaction, oxidation, or protonation, yield aryl methyl sulfides,...

Ion-pair chromatographic separation of water-soluble gold monolayer-protected clusters.

Analytical chemistry

Choi MM, Douglas AD, Murray RW.
PMID: 16615793
Anal Chem. 2006 Apr 15;78(8):2779-85. doi: 10.1021/ac052167m.

We demonstrate the efficacy of ion-pair chromatography for separations of samples of charged, polydisperse, water-soluble gold nanoparticles protected by monolayers of N-acetyl-l-cysteine and of tiopronin ligands. These nanoparticle mixtures have 1-2-nm-diameter Au core sizes as estimated from UV-visible spectra...

Sub-nanometer Au monolayer-protected clusters exhibiting molecule-like electronic behavior: quantitative high-angle annular dark-field scanning transmission electron microscopy and electrochemical characterization of clusters with precise atomic stoichiometry.

The journal of physical chemistry. B

Menard LD, Gao SP, Xu H, Twesten RD, Harper AS, Song Y, Wang G, Douglas AD, Yang JC, Frenkel AI, Nuzzo RG, Murray RW.
PMID: 16805585
J Phys Chem B. 2006 Jul 06;110(26):12874-83. doi: 10.1021/jp060739g.

The synthesis and characterization of the clusters Au13[PPh3]4[S(CH2)11CH3]2Cl2 (1) and Au13[PPh3]4[S(CH2)11CH3]4 (2) are described. These mixed-ligand, sub-nanometer clusters, prepared via exchange of dodecanethiol onto phosphine-halide gold clusters, show enhanced stability relative to the parent. The characterization of these clusters...

Current techniques in surgical correction of congenital ptosis.

Middle East African journal of ophthalmology

Allard FD, Durairaj VD.
PMID: 20616918
Middle East Afr J Ophthalmol. 2010 Apr;17(2):129-33. doi: 10.4103/0974-9233.63073.

Ptosis refers to vertical narrowing of the palpebral fissure secondary to drooping of the upper eyelid to a lower than normal position. Ptosis is considered congenital if present at birth or if it is diagnosed within the first year...

Competitive reaction pathways for o-anilide aryl radicals: 1,5- or 1,6-hydrogen transfer versus nucleophilic coupling reactions. A novel rearrangement to afford an amidyl radical.

The Journal of organic chemistry

Rey V, Pierini AB, Peñéñory AB.
PMID: 19138117
J Org Chem. 2009 Feb 06;74(3):1223-30. doi: 10.1021/jo801892c.

The photoinduced reactions of o-iodoanilides (o-IC6H4N(Me)COR, 4a-d) with sulfur nucleophiles such as thiourea anion (1, -SCNH(NH2)), thioacetate anion (2, MeCOS-), and sulfide anion (3, S(2-)) follow different reaction channels, giving the sulfides by a radical nucleophilic substitution or the...

UV-visible spectroscopic and electrochemical study of the complex formation between Fe(II) and 5-amino-1,10-phenantroline (5-Aphen) in aqueous solution.

Talanta

Lozano-Camargo ML, Rojas-Hernández A, Gómez-Hernández M, Pacheco-Hernández Mde L, Galicia L, Ramírez-Silva MT.
PMID: 19071784
Talanta. 2007 Jun 15;72(4):1458-68. doi: 10.1016/j.talanta.2007.01.065. Epub 2007 Feb 12.

The system Fe(II)-5-Aphen-H(2)O was studied. The spectroscopic and electrochemical results show that only one stable complex between Fe(II) and 5-Aphen forms, having a 1:3 stoichiometric ratio. The spectrophotometry study allowed determination of the formation constant of the complex (logbeta(3)=23.42+/-0.06)....

Biogeography and divergence times of genus Macroptilium (Leguminosae).

AoB PLANTS

Espert SM, Burghardt AD.
PMID: 22476076
AoB Plants. 2010;2010:plq018. doi: 10.1093/aobpla/plq018. Epub 2010 Oct 19.

BACKGROUND AND AIMS: Macroptilium is a herbaceous legume genus with 18 currently accepted species, seven of them with economic importance due to their use as forage, green fertilizer and in medicine. The genus is strictly American, with an unknown...

Biogeography and divergence times of genus Macroptilium (Leguminosae).

AoB PLANTS

Espert SM, Burghardt AD.
PMID: 22476076
AoB Plants. 2010;2010:plq018. doi: 10.1093/aobpla/plq018. Epub 2010 Oct 19.

BACKGROUND AND AIMS: Macroptilium is a herbaceous legume genus with 18 currently accepted species, seven of them with economic importance due to their use as forage, green fertilizer and in medicine. The genus is strictly American, with an unknown...

Human uterine leiomyoma-derived fibroblasts stimulate uterine leiomyoma cell proliferation and collagen type I production, and activate RTKs and TGF beta receptor signaling in coculture.

Cell communication and signaling : CCS

Moore AB, Yu L, Swartz CD, Zheng X, Wang L, Castro L, Kissling GE, Walmer DK, Robboy SJ, Dixon D.
PMID: 20537183
Cell Commun Signal. 2010 Jun 10;8:10. doi: 10.1186/1478-811X-8-10.

BACKGROUND: Uterine leiomyomas (fibroids) are benign smooth muscle tumors that often contain an excessive extracellular matrix (ECM). In the present study, we investigated the interactions between human uterine leiomyoma (UtLM) cells and uterine leiomyoma-derived fibroblasts (FB), and their importance...

Structure-dependent ferromagnetism in Mn-doped III-V nanowires.

Nano letters

Galicka M, Buczko R, Kacman P.
PMID: 21770435
Nano Lett. 2011 Aug 10;11(8):3319-23. doi: 10.1021/nl201687q. Epub 2011 Jul 25.

The electronic and magnetic properties of (Ga,Mn)As and (In,Mn)As nanowires are studied by ab initio methods. The results suggest that, in contrast to the bulk, in nanowires (In,Mn)As may exhibit better ferromagnetic behavior than (Ga,Mn)As. Moreover, the calculations show...

Proceedings of SPIE--the International Society for Optical Engineering

Tate JA, Petryk AA, Giustini AJ, Hoopes PJ.
PMID: 24478825
Proc SPIE Int Soc Opt Eng. 2011 Feb 22;7901:790117. doi: 10.1117/12.876414.

Iron oxide nanoparticles present a promising alternative to conventional energy deposition-based tissue therapies. The success of such nanoparticles as a therapeutic for diseases like cancer, however, depends heavily on the particles' ability to localize to tumor tissue as well...

Alzheimer's Disease: The Role of Microglia in Brain Homeostasis and Proteopathy.

Frontiers in neuroscience

Clayton KA, Van Enoo AA, Ikezu T.
PMID: 29311768
Front Neurosci. 2017 Dec 12;11:680. doi: 10.3389/fnins.2017.00680. eCollection 2017.

Brain aging is central to late-onset Alzheimer's disease (LOAD), although the mechanisms by which it occurs at protein or cellular levels are not fully understood. Alzheimer's disease is the most common proteopathy and is characterized by two unique pathologies:...

Showing 13 to 24 of 265 entries