Molecular Conformation-Controlled Vesicle/Micelle Transition of Cationic Trimeric Surfactants in Aqueous Solution

Langmuir ◽  
2010 ◽  
Vol 26 (11) ◽  
pp. 7922-7927 ◽  
Author(s):  
Chunxian Wu ◽  
Yanbo Hou ◽  
Manli Deng ◽  
Xu Huang ◽  
Defeng Yu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Molecular Conformation ◽  
Trimeric Surfactants

Molecular Conformation of 4-Thiouridine in Aqueous Solution

1971 ◽  
Vol 49 (14) ◽  
pp. 2449-2452 ◽  
Author(s):  
F. E. Hruska ◽  
K. K. Ogilvie ◽  
A. A. Smith ◽  
H. Wayborn
Keyword(s):  
Aqueous Solution ◽  
Long Range ◽  
Crystalline State ◽  
Molecular Conformation ◽  
Spin Coupling ◽  
Pyrimidine Nucleoside ◽  
Coupling Interaction ◽  
X Ray ◽  
Anti Conformation ◽  
Spin Spin Coupling

β-4-Thiouridine is a component of several tRNA molecules. A recent X-ray study has shown that this pyrimidine nucleoside favors the syn conformation in the crystalline state. The 100 and 220 MHz p.m.r. data and a comparison with those of uridine are presented here. A long-range five-bond spin–spin coupling interaction between the H-5 and -1′ hydrogens is noted. The results are consistent with an anti conformation for 4-thiouridine in an aqueous solution.

Ribo-2′-deoxyribo hybrid dinucleoside monophosphates. Proton magnetic resonance studies of 3′,5′- and 2′,5′-uridylyl-2′-deoxythymidine

1978 ◽  
Vol 56 (4) ◽  
pp. 522-529 ◽  
Author(s):  
James Peeling ◽  
Frank E. Hruska ◽  
Peter C. Loewen
Keyword(s):  
Aqueous Solution ◽  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Molecular Conformation ◽  
The Other ◽  
Magnetic Resonance Studies ◽  
Dinucleoside Monophosphates ◽  
Standard Techniques

This 1Hmr study initiates our examination of the conformations of dinucleoside monophosphates possessing ribo 2′- or 3′-nucleotidyl units linked to 5′-nucleotidyl units possessing the 2′-deoxyribo sugar. The syntheses of uridylyl-3′,5′-2′-deoxythymidine (3′,5′-UpdT) and its 2′,5′-isomer, 2′,5′-UpdT, were carried out with standard techniques. The 1Hmr data were obtained at frequencies up to 270 MHz and used to derive the dominant conformation of the dimers in aqueous solution. Comparison with data for the component mononucleotides reveals that dimerization does not lead to drastic changes in the molecular conformation. Literature data for dimers possessing only the ribo sugar (3′,5′-UpU) and the 2′-deoxyribo sugar (3′,5′-d(TpT)) are also presented. The results indicate that, at least for our dipyrimidine dimers, the molecular conformation of a particular fragment is not critically dependent on the nature (ribo or 2′-deoxyribo) of the other nucleotide unit.

Nanostructured Morphology of Adsorption of Polyelectrolyte at the Solid/Liquid Interface Observed by Atomic Force Microscopy

2013 ◽  
Vol 643 ◽  
pp. 127-130
Author(s):  
Hong Ying Xia ◽  
Feng Zhao
Keyword(s):  
Aqueous Solution ◽  
Atomic Force Microscopy ◽  
Molecular Conformation ◽  
Water Interface ◽  
Nacl Solution ◽  
Mica Surface ◽  
Force Microscopy ◽  
Atomic Force ◽  
Solid Liquid Interface ◽  
Solid Liquid

In this paper, the morphology change of various polymers at the mica –water interface, such as polyvinylpyrrolidone (PVP), polystryrenesulfonate (PSS), and partially hydrated polyacrylamide (HPAM) in different environments was investigated by atomic force microscopy (AFM). We found that PVP molecules deposited on mica from aqueous solution appeared in stretched wormlike coils forming densely packed films. In NaCl solution, the globular molecular conformation was observed. For PSS molecules the similar results were obtained. HPAM molecules deposited on the mica surface from aqueous solution at natural pH were observed to form a nanostructured network

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