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SPS organises a seminar by Prerna Gera

SPS organises a seminar by Prerna Gera

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SPS organises a seminar by Prerna Gera
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School of Physical Sciences
Jawaharlal Nehru University, New Delhi


Hydrodynamics of Three-Dimensional Multicomponent Vesicles


Prerna Gera
(University at Buffalo, Buffalo, USA)


Date: 24– May -2018
Time: 4 p.m, Thursday
Venue: Seminar Room, SPS


Abstract : A lipid vesicle is a body of fluid enclosed within a lipid bilayer membrane and can be used to model and study complex biological systems of interest such as cells and micro-capsules. The vesicle membrane protects the enclosed material and acts as the medium of communication between the intra- and extra-cellular environments. Irregularities of disruptions in the composition of the membrane can have an impact on fundamental cellular processes such as signal transduction, membrane trafficking, and membrane sorting. The membrane surface of a lipid vesicle is composed of saturated lipids that combine with cholesterol to form energetically stable domains are also known as the ordered phase. The ordered phase is surrounded by unsaturated lipids or the disordered phase. The presence of different lipid species with varying material properties such as bending rigidity produce a rich variety of shapes, patterns and dynamics as observed in experiments. In this work, a three-dimensional model is presented to explore the dynamics of multicomponent vesicles, both in the presence and absence of an externally driven fluid. The surface of the multicomponent membrane is modeled using a two-phase surface Cahn-Hilliard equation using a combined level set/closest point method. The multicomponent membrane is coupled to the surrounding fluid via a variation-of-energy approach. In this talk, sample results will be presented and compared to available experimental results. The spectrum of dynamics observed by this predictive model will be discussed and a systematic approach to investigate the influence of material properties of the underlying lipid species will be presented.

A warm welcome to the modified and updated website of the Centre for East Asian Studies. The East Asian region has been at the forefront of several path-breaking changes since 1970s beginning with the redefining the development architecture with its State-led development model besides emerging as a major region in the global politics and a key hub of the sophisticated technologies. The Centre is one of the thirteen Centres of the School of International Studies, Jawaharlal Nehru University, New Delhi that provides a holistic understanding of the region.

Initially, established as a Centre for Chinese and Japanese Studies, it subsequently grew to include Korean Studies as well. At present there are eight faculty members in the Centre. Several distinguished faculty who have now retired include the late Prof. Gargi Dutt, Prof. P.A.N. Murthy, Prof. G.P. Deshpande, Dr. Nranarayan Das, Prof. R.R. Krishnan and Prof. K.V. Kesavan. Besides, Dr. Madhu Bhalla served at the Centre in Chinese Studies Programme during 1994-2006. In addition, Ms. Kamlesh Jain and Dr. M. M. Kunju served the Centre as the Documentation Officers in Chinese and Japanese Studies respectively.

The academic curriculum covers both modern and contemporary facets of East Asia as each scholar specializes in an area of his/her interest in the region. The integrated course involves two semesters of classes at the M. Phil programme and a dissertation for the M. Phil and a thesis for Ph. D programme respectively. The central objective is to impart an interdisciplinary knowledge and understanding of history, foreign policy, government and politics, society and culture and political economy of the respective areas. Students can explore new and emerging themes such as East Asian regionalism, the evolving East Asian Community, the rise of China, resurgence of Japan and the prospects for reunification of the Korean peninsula. Additionally, the Centre lays great emphasis on the building of language skills. The background of scholars includes mostly from the social science disciplines; History, Political Science, Economics, Sociology, International Relations and language.

Several students of the centre have been recipients of prestigious research fellowships awarded by Japan Foundation, Mombusho (Ministry of Education, Government of Japan), Saburo Okita Memorial Fellowship, Nippon Foundation, Korea Foundation, Nehru Memorial Fellowship, and Fellowship from the Chinese and Taiwanese Governments. Besides, students from Japan receive fellowship from the Indian Council of Cultural Relations.