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structure and mobility varied with reverse micelle water content, i.e., the size of the confining volume, as well as with the proximity to the surfactant interface. Although quite simple, this model helped to explain many observed trends in water and solute dynamics in reverse micelles. Its importance can be measured by the many and continuing citations it has received and its use by others. She applied this simple model to solvation dynamics in confined environments, predicting that chromophore-surfactant interactions can lead to dramatically different results for solutes that repelled by and attracted to the surfactant layer. She also showed that solute motion relative to the interface plays a role, opening up a relaxation channel that is absent in bulk liquids.
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hydrogen bonding solvents and that solute-solvent hydrogen-bond formation is an important solvation mechanism in these systems. She developed methods, including instantaneous normal mode analysis, to uncover mechanistic information about solvation in systems that exhibit approximately linear response. With the advent of ultrafast spectroscopic techniques, the short-time nondiffusive dynamics in liquids became experimentally accessible and
Ladanyi actively developed and implemented the theoretical framework for identifying and analyzing the molecular mechanisms contributing to the short-time response of fluids to perturbations relevant to experimental probes.
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Early in her career, Ladanyi used molecular theory and computer simulation to explore properties of liquids. She developed integral equation techniques to evaluate the structure, thermodynamic properties and dielectric constants of polar mixtures. Her work elucidated the reasons for the differences
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Ladanyi made significant contributions to the molecular theory and computer simulation of liquids. Extensive collaborations with both theoretical and experimental scientists were the hallmark of her work. Over her career, she often joined forces with others enriching both her and others' research.
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Ladanyi developed physically realistic models for the interaction-induced polarizability, their implementation in computer simulation studies, and the analysis of the polarizability response in terms of the underlying fluid structure and dynamics. Her work elucidated how this response depends on
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Ladanyi's work improved our understanding of the molecular mechanisms of solvation dynamics and their dependence on the solute, the solvent, and the perturbation in solute-solvent interactions. She was the first to show that the solvent's response is highly nonlinear for a variety of solutes in
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A significant portion of
Ladanyi's research after 2000 explored the properties of aqueous interfaces and nanoconfined liquids. Her first paper in this area presented a reduced model, including continuum and atomistic portions, for the interior region of reverse micelles and determined how water
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reactions. This work generally found that solvation free energies exhibit relatively weak deviations from linearity, but that nonlinearities are more evident in free energy derivatives. She considered both simple model solutes and realistic representations of chromophores used in experiments in
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in fall of 1979. Ladanyi was tenured and promoted to the rank of associate professor in 1984, and promoted to professor in 1987. Ladanyi remained affiliated with
Colorado State University throughout her professional career.
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in the relaxation properties of transverse and longitudinal dipole densities. She showed how hydrogen-bond stretch dynamics contribute to dielectric relaxation of alcohols, once induced-dipole contributions are included.
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molecular properties such as shape, polarizability anisotropy and polarity, intermolecular interactions such as hydrogen bonding, and fluid thermodynamic parameters such as density, temperature and composition.
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Ladanyi contributed to research on the molecular aspects of solvation thermodynamics in polar liquids. She and her coworkers calculated quantities of significance in electronic spectroscopy and
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shifts in solute electronic spectra relate to local solvation structure and how different types of solute-solvent interactions contribute to the predicted shifts.
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Her papers remain relevant and cited; researchers seek her work to model their systems thereby developing deep molecular level understanding of complex systems.
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as a postdoctoral associate. She returned to Yale as a research associate until joining the faculty as an assistant professor in the department of chemistry at
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Throughout her career, Ladanyi worked collaboratively with many other scientists worldwide. Ladanyi died in 2016 after a year-long battle with leukemia.
122:(September 7, 1947 – January 30, 2016) was a Yugoslavian-born Croatian-American physical chemist, who spent her career in the department of chemistry at
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Buchner, Michael; Ladanyi, Branka M.; Stratt, Richard M. (1992). "The short-time dynamics of molecular liquids. Instantaneous-normal-mode theory".
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Fonseca, T.; Ladanyi, B. M. Wave vector dependent static dielectric properties of associated liquids: Methanol. J. Chem. Phys. 1990, 93, 8148-8155.
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126:. Her research focused on structure and dynamics of liquids, broadly defined, which she studied using theoretical and computational techniques.
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Geiger, Lynn C.; Ladanyi, Branka M. (1987). "Higher order interaction-induced effects on
Rayleigh light scattering by molecular liquids".
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Ladanyi, Branka M.; Chandler, David (1975). "New type of cluster theory for molecular fluids: Interaction site cluster expansion".
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Ladanyi, Branka M.; Stratt, Richard M. (1995). "Short-Time
Dynamics of Solvation: Linear Solvation Theory for Polar Solvents".
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Faeder, James; Ladanyi, Branka M. (2001). "Solvation
Dynamics in Aqueous Reverse Micelles: A Computer Simulation Study".
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Faeder, J.; Ladanyi, B. M. (2000). "Molecular
Dynamics Simulations of the Interior of Aqueous Reverse Micelles".
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Fonseca, Teresa; Ladanyi, Branka M. (1991). "Breakdown of linear response for solvation dynamics in methanol".
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Horace Watson Gold Medal (for highest standing in the Honors
Physics Program), McGill University (1969)
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the first woman to serve in this capacity; she reverted to associate editor again in 2009 until 2010.
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Visiting
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Ladanyi was the first female associate editor and then the interim editor-in-chief of
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From 1994 to 2007, Ladanyi served as one of the first associate editors for the
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National
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Invited Professorship, Université de Provence, Marseille, France (June 2010)
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Fellows of the American Association for the Advancement of Science
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published a Festschrift celebrating the career of Branka Ladanyi.
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to investigate how the density- and temperature-dependence of
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217:, Yugoslavia (now Croatia) in 1947. As a child, she moved to
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Camille and Henry Dreyfus Teacher-Scholar Grant (1983–87)
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Theory and molecular simulation of light scattering and
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Levinger, N. E.; Maroncelli, M.; Stratt, R. M. (2015).
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American Association for the Advancement of Science
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University Scholarship, McGill University (1968–69)
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American Association for the Advancement of Science
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201:Learn how and when to remove this message
86:Chemistry, Physics, molecular simulations
922:Fellows of the American Physical Society
912:Fellows of the American Chemical Society
902:The Journal of Chemical Physics editors
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887:21st-century American women scientists
331:Liquid interfaces and confined liquids
27:American physical chemist (1947–2016)
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179:adding citations to reliable sources
927:American people of Croatian descent
761:The Journal of Physical Chemistry B
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691:The Journal of Physical Chemistry
613:The Journal of Physical Chemistry
446:"The Journal of Chemical Physics"
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135:from 2007 to 2008. In 2015 the
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471:"Tribute to Branka M. Ladanyi"
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288:Dielectric properties
932:Deaths from leukemia
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143:Education and career
120:Branka Maria Ladanyi
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