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Resonance light-scattering studies of porphyrin diacid aggregates

Robert F. Pasternack、Kurt F. Schaefer、Peter Hambright1994-04-01Inorganic Chemistry

Resonance light-scattering measurements have been employed to investigate the solute species present in acidic aqueous media for some 14 sulfonated porphyrins. The results confirm that the anomalous absorption band in the Soret region reported for several of these porphyrins arises from the formation of extended aggre…

Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesPhotochemistry and Electron Transfer Studies

Thin film microcalorimeter for heat capacity measurements from 1.5 to 800 K

D. W. Denlinger、E.N. Abarra、K. M. Allen 等 7 位作者1994-04-01Review of Scientific Instruments

A new microcalorimeter for measuring heat capacity of thin films in the range 1.5–800 K is described. Semiconductor processing techniques are used to create a device with an amorphous silicon nitride membrane as the sample substrate, a Pt thin film resistor for temperatures greater than 40 K, and either a thin film am…

Thermal properties of materialsAdvanced Thermoelectric Materials and Devicesthermodynamics and calorimetric analyses

Molecular interpretation of the absorption-induced optical reorientation of nematic liquid crystals

I. Jánossy1994-04-01Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics

A molecular mechanism is proposed to explain the anomalous optical reorientation observed in nematic guest-host systems. According to the model, light-induced reorientation in these systems is due to the interaction between the excited dye molecules and the nematic host. The model justifies a phenomenological descript…

Nonlinear Optical Materials StudiesMolecular spectroscopy and chiralityLiquid Crystal Research Advancements

Analysis of the induction of general stress proteins of Bacillus subtilis

Uwe Völker、Susanne Engelmann、Björn Maul 等 8 位作者1994-04-01Microbiology

In Bacillus subtilis stress proteins are induced in response to different environmental conditions such as heat shock, salt stress, glucose and oxygen limitation or oxidative stress. These stress proteins have been previously grouped into general stress proteins (Gsps) and heat-specific stress proteins (Hsps). In this…

Heat shock proteins researchEnzyme Structure and FunctionProtein Structure and Dynamics

Titelei

作者信息未提供1994-04-01Applied Rheology