Effect of Some Amides & Amines on the Photocatalysed Reaction of Benzyl Alcohol on Zinc Oxide

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PHOTOLYSIS OF SOME CYCLIC DISULFIDES

Author Institution: Coates Chemical Laboratories, Louisiana State UniversityThe photolysis of tetra- and pentamethylene disulfides and 1,4-butanedithiol has been investigated for the pure liquids and for the liquids doped with alkali. The courses of the photochemical reactions were followed by observing the UV absorption in the region of $1850-2300 {\AA}$ of the vapors in equilibrium with the photolized liquid. Photolysis of the disulfides produced the corresponding dithiols whereas addition of alkaki resulted in formation of the respective cyclic monosulfides at a much faster rate. The 1,4-butanedithiol also produced a cyclic monosulfide with the rate of formation being greatly enhanced by the addition of NaOH. Reaction mechanisms are proposed as well as a somewhat general photochemical rule for solutions or any condensed medium to the effect that in those cases where photodecomposition occurs, it will proceed primarily from the lowest excited state unless the irradiation energy exceeds the ionization limit; furthermore, dependent on the magnitude of intersystem crossing rate constants, this lowest excited state may be either singlet, triplet, or both

Mössbauer Spectroscopy with a High Velocity Resolution in the Studies of Nanomaterials

The present review describes our long experience in the application of Mössbauer spectroscopy with a high velocity resolution (a high discretization of the velocity reference signal) in the studies of various nanosized and nanostructured iron-containing materials. The results reviewed discuss investigations of: (I) nanosized iron cores in: (i) extracted ferritin, (ii) ferritin in liver and spleen tissues in normal and pathological cases, (iii) ferritin in bacteria, (iv) pharmaceutical ferritin analogues; (II) nanoparticles developed for magnetic fluids for medical purposes; (III) nanoparticles and nanostructured FINEMET alloys developed for technical purposes. The results obtained demonstrate that the high velocity resolution Mössbauer spectroscopy permits to excavate more information and to extract more spectral components in the complex Mössbauer spectra with overlapped components, in comparison with those obtained by using conventional Mössbauer spectroscopy. This review also shows the advances of Mössbauer spectroscopy with a high velocity resolution in the study of various iron-based nanosized and nanostructured materials since 2005

Multiple Team Membership (MTM) and the future of work:How MTM experiences affect knowledge workers

Knowledge workers are asked to work concurrently on several teams, but very few studies have tried to operationalize Multiple Team Memberships (MTM) using a variety of metrics, above and beyond the number of teams. However, broader conceptualizations of MTM (for instance, different forms of context variety) could help appreciate some unique benefits and challenges for multi-teamers. Relatedly, we still need to more broadly understand how people interpret and give meaning to their different experiences in MTM contexts. This symposium addresses these pressing issues by presenting four papers looking at the interplay between various conceptualizations of MTM (e.g., number of teams, variety of perceived team inclusion, variety of perceived team prestige) and several underexplored individual outcomes such as creativity, emotions, thriving at work, and the likelihood to enter multiple boards. Importantly, the papers use multiple methods and multiple sources of data such as qualitative data based on interviews, quantitative data based on surveys, and longitudinal panel data. They also focus on the experiences of people when engaged in scenarios of MTM within the boundaries of single firms as well as when they work across multiple firms