On the nonlinear dynamic plane base-rotator models of DNA: Base-base interaction and dissipation

1991 ◽  
Vol 18 (2) ◽  
pp. 127-136 ◽  
Author(s):  
V. Lisy ◽  
V. K. Fedyanin
Keyword(s):  
Nonlinear Dynamic ◽  
Base Interaction ◽  
Plane Base ◽  
Dna Base ◽  
Dynamic Plane

scholarly journals The Interaction of Adenine with Zn12O12 Cluster from Density Functional Theory

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Nguyen Huu Tho ◽  
Nguyen Thanh Trung
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Energy Gap ◽  
Population Analysis ◽  
Basis Sets ◽  
Base Interaction ◽  
Functional Theory ◽  
Model Cluster ◽  
Dna Base ◽  
Energy Frontier

Geometries associated energy gap and electronic properties of adenine, DNA base interaction on the ZnO model cluster have been investigated by using density functional theory with the B3LYP exchange-correlation potential and effective core potential (ECP) LanL2DZ basis sets. The most stable interaction characteristics were analysed with respect to the binding energy, frontier orbital, elemental positions. Natural population analysis charge is also examined to understand the associated charge transfer in structures of cluster and complex. In the Zn-N bonding, combination coefficient from atom orbitals of nitrogen is much higher than that of zinc. The corresponding weight for this coefficient is 94.80%. The results of this study can serve as an orientation for the design of composite material in biomedical nanotechnology.

scholarly journals An intrastrand three-DNA-base interaction is a key specificity determinant of F transfer initiation and of F TraI relaxase DNA recognition and cleavage

2008 ◽  
Vol 36 (14) ◽  
pp. 4565-4572 ◽  
Author(s):  
Katherine Hekman ◽  
Kip Guja ◽  
Chris Larkin ◽  
Joel F. Schildbach
Keyword(s):  
Dna Recognition ◽  
Base Interaction ◽  
Dna Base

scholarly journals Artemisinin DNA Base Interaction Studies in Presence of Fe(II): LC/TOF MS Separation of Reaction Products

Separations ◽  
2021 ◽  
Vol 8 (9) ◽  
pp. 161
Author(s):  
Kogila Oke ◽  
Amos Mugweru
Keyword(s):  
Room Temperature ◽  
Dna Bases ◽  
Reaction Products ◽  
Base Interaction ◽  
Anticancer Properties ◽  
Dna Base ◽  
Main Driver ◽  
Chromatographic Peaks ◽  
Tof Ms

Artemisinin (ART) is a sesquiterpene lactone and a popular malaria drug with potential anticancer properties. In this work, LC/TOF/MS, was used to investigate the reaction of ART with DNA bases. ART-deoxyadenosine and ART-deoxycytidine interactions, were studied in the presence of iron II ions. ART-deoxyadenosine and ART-deoxycytidine reaction mixtures gave chromatographic signatures that remained fairly unchanged at room temperature but grew after incubation at 37 °C. The change in temperature from room temperature to 37 °C was the main driver of adduct formation in these reactions. ART was found to react with Fe(II) ions as observed from several new chromatographic peaks. ART-deoxyadenosine as well as ART-deoxycytidine in the presence of Fe(II) ions resulted in formation of new chromatographic signatures of adducts consisting of DNA bases and ART. It was clear that addition of iron (II) to DNA base-ART mixtures gave rise to new reaction products mediated by a different reaction mechanism. Studies of ART reactions with DNA in vitro is key in elucidating elusive mechanism of this drug.

Real-time cryo-deformation of polypropylene and impact-modified polypropylene in the transmission electron microscope

1993 ◽  
Vol 51 ◽  
pp. 892-893
Author(s):  
Robert C. Cieslinski ◽  
H. Craig Silvis ◽  
Daniel J. Murray
Keyword(s):  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Failure Mechanisms ◽  
Brittle Transition ◽  
Molded Part ◽  
Transmission Electron ◽  
Solvent Cast ◽  
The Impact ◽  
Annealed Copper ◽  
Dynamic Plane

An understanding of the mechanical behavior polymers in the ductile-brittle transition region will result in materials with improved properties. A technique has been developed that allows the realtime observation of dynamic plane stress failure mechanisms in the transmission electron microscope. With the addition of a cryo-tensile stage, this technique has been extented to -173°C, allowing the observation of deformation during the ductile-brittle transition.The technique makes use of an annealed copper cartridge in which a thin section of bulk polymer specimen is bonded and plastically deformed in tension in the TEM using a screw-driven tensile stage. In contrast to previous deformation studies on solvent-cast films, this technique can examine the frozen-in morphology of a molded part.The deformation behavior of polypropylene and polypropylene impact modified with EPDM (ethylene-propylene diene modified) and PE (polyethylene) rubbers were investigated as function of temperature and the molecular weight of the impact modifier.

CONSTRUCTION OF THE DIAGNOSTIC MODEL BASED ON COMBINING SPECTRAL CHARACTERISTICS OF NONLINEAR DYNAMIC OBJECTS

2020 ◽  
Vol 3 (1) ◽  
pp. 431-442
Author(s):  
Hanna Fedorova ◽  
Oleksandr Fomin ◽  
Oleksandr Ruban ◽  
Vitaliy Pavlenko
Keyword(s):  
Nonlinear Dynamic ◽  
Spectral Characteristics ◽  
Diagnostic Model ◽  
Model Based ◽  
Dynamic Objects
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