Clusters of metal atoms at a fixed size can assume different structural arrangements, known as isomers, which may have nearly the same energy. Therefore, at given experimental conditions distribution of these isomers can be present. While the size selection is a relatively common technique, the isomer selection is not; it is therefore more difficult to obtain information about a single isomer. ...

Prompt and delayed γ-ray spectroscopy of the neutron-deficient, semi-magic isotope 187Pb has been performed using recoil-decay isomer-decay tagging techniques at Argonne Gas-Filled Analyzer. A new 5.15(15)-μs isomeric state only 308 keV above spherical 3/2− ground is identified classified as a shape isomer. strongly-coupled band observed on top isomer, which nearly identical to one built prolat...

The long-lived high-spin 2HfK isomer can be produced in nuclear reactions with different projectiles. The reaction yields and cross sections have been measured in a series of experiments and the results are now reviewed. The systematics of isomer-to-ground-state ratios are drawn and real production capabilities are estimated for the best reactions. Such a summary is relevant to the significance...

Theoretical simulations are performed for the vibrational spectra of selected isomers of OH(-)(H(2)O)(3) and OH(-)(H(2)O)(4) clusters to understand the origin of the difference in the experimental OH stretching fundamental spectra between these clusters reported by Robertson et al. [Science, 2003, 299, 1367]. Vibrational excitation energies and intensities are calculated by combining the adiaba...

The ability to decrypt volatile plant signals is essential if herbivorous insects are to optimize their choice of host plants for their offspring. Green leaf volatiles (GLVs) constitute a widespread group of defensive plant volatiles that convey a herbivory-specific message via their isomeric composition: feeding of the tobacco hornworm Manduca sexta converts (Z)-3- to (E)-2-GLVs thereby attrac...

A specific inactivator of chymotrypsin, p-azophenyldiphenylcarbamyl chloride, exists as two geometric isomers, cis and trans, which are interconvertible by means of light. The cis-isomer is five times more reactive than the more stable trans-isomer, and is obtained by exposure of the latter to light of 320 nanometer wavelength. The trans-isomer can be regained by exposure of the cis-isomer to l...

Astaxanthin Z-isomers potentially have greater bioavailability and biological activity than (all-E)-astaxanthin. However, the stability of is lower all-E-isomer, which a serious problem affecting its practical use. In this study, we investigated impacts different suspension media (oils fats) additives on astaxanthin isomer identified suitable ones for stabilization. The evaluations showed that ...

The ligand tppda has been designed and synthesized as molecular leverage for helicity control when reacted with Cd(2+) ions. The guests MeOH or DMF preferentially stabilize the P-helical isomer, while the guest H2O causes a helix inversion to give the M-helical isomer as the major isomer without any chiral auxiliary.

Hexachlorocyclohexane (HCH), a synthetic organochloride, was first used as a broad-acre insecticide in the 1940s, and many HCH-degrading bacterial strains have been isolated from around the globe during the last 20 years. To date, the same degradation pathway (the lin pathway) has been implicated in all strains characterized, although the pathway has only been characterized intensively in two s...