نتایج جستجو برای: conformation
تعداد نتایج: 37872 فیلتر نتایج به سال:
The large-scale conformation of DNA molecules plays a critical role in many basic elements of cellular functionality and viability. By targeting the structural properties of DNA, many cancer drugs, such as anthracyclines, effectively inhibit tumor growth but can also produce dangerous side effects. To enhance the development of innovative medications, rapid screening of structural changes to DN...
چکیده ندارد.
the 1h and natural-abundance 13c-nmr spectra of 1-thiacyclooctan-3-one (1) have been measured from 25 to -100°c. coalescence is observed in the 1h-nmr spectra of (1) at about -80°c, and attributed to ring inversion in a boat-chair conformation, which is the predominant conformation of (1). the free energy of activation (dg¹) for this process is 9.2±0.2 kcal/mol. the 13c-nmr spectra of (1) is te...
thirty nine novel 1,2,3,4-tetrahydropyrimidinone (thione)s were subjected to conformational studies. density functional theory at b3lyp/6-31 g* was performed as the computational method of high accuracy. important dihedral angles and bond lengths were investigated and the values obtained were explainable. results of this work confirm a twisted boat tetrahydropyrimidine ring conformation with an...
The Cover Feature illustrates the pathways undergone by ditellurocines from solid state (represented stones) to solution water cascade). Once ditellurocine crystals/stones roll down in cascade, metamorphosis occurs, cubic-like arrangement a caterpillar (less stable chair conformation) then lying butterfly (transition state) and flying (more boat conformation). More information can be found Full...
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