Optical Spectroscopic Determination of the Zero-Field Splitting in Vibronic Levels of the Triplet State of Nitrite

We have used conventional high resolution optical spectroscopic methods to determine the principal values of the fine structure tensor for the lowest triplet state (3B1 at 18 959 cm^−1) of NO2 - in Na NO2 single crystals. From the intensities in the Zeeman spectrum we find [dformula D - E = 0.86 [plus-minus] 0.04cm[sup -1],] [dformula D + E = 0.40 [plus-minus] 0.04cm[sup -1],] where the z axis is taken as the twofold axis and E = (Z − X) / 2. From the measurement of line positions in the high-field Zeeman spectrum we find D − E = 0.84 ± 0.05cm−1,D + E = 0.41 ± 0.05cm−1. The values of D and E calculated for one-center spin–spin interaction are D − E = 0.42cm^−1 and D + E = 0.24cm^−1. The calculated ordering of the spin states is the same as that observed, but we suggest that there is significant second-order spin–orbit energy associated with the real splittings. Roughly the same splittings are seen for different vibronic levels of 3B1 associated with nu2[prime

Studies of the 3455-Å Triplet State of s-Triazine

We present a confirmation of the assignment of the 28 935-cm^−1 triplet state, 3A1[double-prime], of s-triazine. The high-field Zeeman effect is used to make this assignment which is consistent with the fact the transition is polarized perpendicular to the molecular plane. The optical spectrum at low magnetic fields yields the zero-field splitting D=−0.058±0.024 cm^−1. The sign and magnitude of D is consistent with an npi* state in which one-center spin—spin interaction is a significant feature of the zero-field splitting

Degradation of the yeast MATα2 transcriptional regulator is mediated by the proteasome

AbstractRapid degradation of specific regulatory proteins plays a role in a wide range of cellular phenomena, including cell cycle progression and the regulation of cell growth and differentiation. A major mechanism of selective protein turnover in vivo involves a large multi-subunit protease known as the proteasome or multi-catalytic proteinase. At the same time, the degradation of many cellular proteins requires their covalent ligation to the polypeptide ubiquitin. Here we show that the yeast S cerevisiae MATα2 repressor, which is known to be ubiquitinylated in vivo, requires the proteasome for its rapid intracellular proteolysis

Mixed Magnetic and Electric Dipole Transition in s-Triazine

We have shown that the radiation pattern for absorption to the lowest energy excited singlet state of s‐triazine corresponds to that of a mixed electric and magnetic dipole transition. This was done by demonstrating, for the first time with an organic, the classic procedure of obtaining absorption coefficients for different k, ε̂, and Ĥ for a uniaxial arrangement of molecules. We find the 30 014 cm^(−1) transition of s‐triazine to be 26% magnetic and 74% electric dipole, hence the state symmetry is ^1 E in the crystal field, and ^1 E″ in the free molecule (D_(3h) )

Optical, magnetic resonance, and ENDOR studies of the nπ^* triplet state of benzophenone in mixed crystals

[No Abstract

Zeeman Effect Studies of the Triplet States of Benzene

[No Abstract

Pufendorf, Samuel

During the last two decades, Samuel von Pufendorf’s (1632–1694) natural law philosophy has become the subject of renewed and growing attentiveness among intellectual historians and philosophers (Seidler 2015). In the late-seventeenth century and early eighteenth century, Pufendorf was the most widely-read moral and political philosopher in Europe, whose reputation is most clearly exemplified in the impressive number of translations and editions of his works. Pufendorfian natural law theory offered a shared vocabulary and conceptual possibilities for the discussion of morality, politics and interstate relations for numerous eighteenth-century thinkers, such as Christian Thomasius, the authors of the Scottish Enlightenment and Jean-Jacques Rousseau. Pufendorf spent large parts of his career in princely courts and portrayed the history of states and their natural law foundations in his widely circulated historical works (Seidler 1997). Moreover, he also wrote on the issues of theology and church-state relations (Döring 1992, Zurbuchen 1998).Peer reviewe

Optical, magnetic resonance, and ENDOR studies of the nπ^* triplet state of benzophenone in mixed crystals

[No Abstract