The NMR spectra of azo dyes, 5-arylazobarbituric (5a-g), 5-arylazo-1,3-dimethylbarbituric(6a-g) and 5-arylazothiobarbituric acids (7a-g) were studied in DMSO-d6 in differentconcentrations. An intramolecular hydrogen bond was observed and indicating that thehydrazone forms is mostly predominant. The peak of the hydrazone proton was severelybroadened and its chemical shift appeared at down field ...

an intramolecular palladium catalysed carbometalation followed by anion capture achieves construction of a model comprised of the a ring of vitamin d oxygen analogues.

An intramolecular palladium catalysed carbometalation followed by anion capture achieves construction of a model comprised of the A ring of Vitamin D oxygen analogues.

Protonation of the reactive intermediates generated in the raction between dalkyl acetylenedicarboxylates and triphenylphosphine by isonitrosoacetophenone leads to vinyltriphenylphosphonium salts, which undergo intramolecular Wittig reaction to produce dalkyl 4-phenyl-N-hydroxypyrrole-2,3-dicarboxylates in moderate yields.

Examples of inter- and intramolecular direct co-functioning of lectins and enzymes are summarized. The data indicate importance of lectin-enzyme relationships in molecular and clinical microbiology and medical biotechnology. Lectin-enzyme relationships have extended prospects in medicine and biotechnology.

Contact mechanics is related to the deformation study of solids that meet each other at one or more points. The physical and mathematical formulation of the problem is established upon the mechanics of materials and continuum mechanics and focuses on computations involving bodies with different characteristics in static or dynamic contact. Contact mechanics gives essential information for the s...

Vibrational spectroscopy is one of the most important experimental techniques for characterization molecules and materials. Spectroscopic signatures retrieved in experiments are not always easy to explain terms structure dynamics studied samples. Computational studies a crucial tool helping understand predict results. Molecular simulations have emerged as an attractive method simulation vibrati...

contact mechanics is related to the deformation study of solids that meet each other at one or more points. the physical and mathematical formulation of the problem is established upon the mechanics of materials and continuum mechanics and focuses on computations involving bodies with different characteristics in static or dynamic contact. contact mechanics gives essential information for the s...