Customer Behavior Impact on International Tourist's Travel Intention Due to Covid-19

Purpose: Several industries affected by the Covid-19 outbreak – one of the most affected is the tourism industry due to travel restrictions, which have resulted in an unprecedented slump in the number of International tourists. This situation has an impact on changing consumer behavior towards intention to travel. This study aims to measure the impact of Covid-19 on International tourists' consumer behavior towards crises to intention to travel overseas after the pandemic is over. Research methodology: A paper questionnaire was distributed to International tourists who have been traveling abroad (outside country of origin) at least once during the last 12 months through a nonprobability, convenience-sampling approach. A total of 350 questionnaires were analyzed using multiple regression linear. Results: The results from the regression model suggest that: (1) general impact have significant partial effects on traveling intention; (2) attitude and preference have a significant partial impact to travel intention; (3) hygiene and safety have significant partial impacts to travel intention; (4) general impact, attitude, and preference, hygiene and safety have a significant simultaneous impact to travel intention. Implications and future research issues were discussed. Limitations: This research is limited due to the limited number of respondents. Contribution: This research suggests that every country carries out promotions and increases national branding to rebuild trust to travel. Keywords: Impact, Covid-19, Customer behavior, International tourists, Travel intention, Post-pandemi

Lifetimes of the Vibrational States of DNA Molecules in Functionalized Complexes of Semiconductor Quantum Dots

Results of studying nanocrystalline nc-Si/SiO2 quantum dots (QDs) functionalized by short oligonucleotides show that complexes of isolated crystalline semiconductor QDs are unique objects for detecting the manifestation of new quantum confinement phenomena. It is established that narrow lines observed in high-resolution spectra of inelastic light scattering can be used for determining the characteristic time scale of vibrational excitations of separate nucleotide molecules and for studying structural-dynamic properties of fast oscillatory processes in biomacromolecules

Functionalization of nc-Si/SiO₂ semiconductor quantum dots by oligonucleotides

nc-Si/SiO2 crystalline semiconductor quantum dots are very attractive as fluorescent labels for developing biosensors integrated with biomedical materials due to their unique physical properties in the visible region of the spectrum. We report on the functionalization of such nanostructures by single-strand short oligonucleotides using the d(20G,20T) system (d is deoxyribonucleotide, G is guanine, and T is thymine) as an example. Oligonucleotides are obtained by chemical synthesis using the solid-phase phosphoramidite technique. Studies using developed methods of Raman spectroscopy of high spectral and spatial resolution are performed on such complexes. The previously unpredicted phenomenon of multiband selective resonant light scattering by isolated molecular groups, caused by the nonradiative transfer of photoexcited electrons, is observed using a system of nc-Si/SiO2 quantum dots functionalized by d(20G,20T) oligonucleotides as an example. The results obtained suggest that the developed approach can be used to study the molecular structure of semiconductor quantum-dot and DNA complexes