Calender
January 27, 2020 at 4.00 pm in AG-69
Title :
Role of Acetylation at Active Site Lysine in Maintaining the Functional State of CDK1-Cyclin B Complex
January 20, 2020 at 2.30 pm in AG-80
Title :
Planarization of Anthracene fused Cyclooctatetraene
January 13, 2020 at 4.00 pm in AG-69
Title :
Maneuvering the stability and reactivity of ‘[3]Dendralenes”, an exciting class of oligo-enes for diversity oriented organic synthesis
Abstract :
Organic synthesis is mainly concerned with C-C and C-X (X = heteroatom) bond forming reactions. The biggest challenge is to perform them under strict control of regio-, stereo- and enantio-selectivity, and also to achieve diverse structural complexity in fewer steps. Carbon-carbon double bond (olefin) is an important synthon in organic chemistry for further C–C bond formation, diverse functional group generation and for construction of complex organic structures. Olefins also exhibit great structural diversity when several such bonds are put together in a molecule. Depending upon the type of connectivity of the ethylene units, conjugated polyenes can be classified into various classes. A geminal linkage results in a class of cross conjugated polyenes called as "Dendralenes". Despite being in existence in Nature and having been synthesized as early as in 1955, they remained "unmanageable" until the turn of this century mainly owing to their unpredictable stability and reactivity.
Due to the abundance of fused hetero- and carbocyclic ring systems in numerous bio-active compounds, such motifs have intrigued synthetic organic chemists. Besides, an efficient synthesis of such architecturally complex scaffolds is an uphill task and hence poses a formidable challenge. In this regard, [3]dendralenes are fascinating molecules because they possess huge potential for the quick generation of diverse and complex multicyclic scaffolds when subjected to tandem Diels–Alder (DA) reactions, also known as diene transmissive Diels–Alder (DTDA) sequences. But their synthesis is a tall order.
The chronicles of our roller-coaster journey and systematic approach beginning from the development of new olefination protocols, synthesis of extremely unstable, non-isolable [3]dendralenes through moderately stable examples and finally, highly functionalized stable [3]dendralenes will be presented. The attributes affecting their stability and reactivity have been recognized. Also, how these dendralenes, upon judicious maneuvering, can be engaged in a DTDA sequence, thus harnessing their full potential by construction of a small but diverse library of complex frameworks in a quick and efficient manner, with step and atom economy will be discussed.
Selected References
1. S. K. Ghosh, R. Singh and S. M. Date, Chem. Commun., 2003, 636.
2. S. M. Date and S. K. Ghosh, Angew. Chem. Int. Ed., 2007, 46, 386.
3. R. Singh and S. K. Ghosh, Org. Lett., 2007, 9, 5071.
4. R. Singh and S. K. Ghosh, Chem. Commun., 2011, 47, 10809.
5. G. S. Naidu, R. Singh and S. K. Ghosh, RSC Adv., 2016, 6, 37136.
6. R. Singh, G. S. Naidu and S. K. Ghosh, Proc. Natl. Acad. Sci., India, Sect. A Phys. Sci., 2016, 86, 619.
7. G. S. Naidu, R. Singh, M. Kumar and S. K. Ghosh, J. Org. Chem., 2017, 82, 3648.
8. G. S. Naidu, R. Singh and S. K. Ghosh, Synlett, 2018, 29, 282.
January 13, 2020 at 11.30 am in AG-80
Title :
Multiphoton femtosecond laser spectroscopy of anisotropic molecular probes
Abstract :
The talk presents a review of theoretical and experimental investigations of polarized fluorescence in anisotropic molecular probes excited via two-color two-photon transitions by femtosecond laser pulses.
The molecular probes under study were small biomolecules which are of importance for bio-medical applications: indole, tryptophan, and NADH (nicotinamide adenine dinucleotide). The polarized fluorescence was excited in molecular solutions by simultaneous absorption of two laser photons with different and variable wavelengths thus allowing for tuning of the total excitation energy in the range 4,04-7,09 eV. By alternating the polarization of each of the three photons involved in the photoprocess a set of molecular parameters describing the photoprocess dynamics were determined. Analysis of the results obtained was performed on the basis of ab initio computations of excited state molecular structure and transition dipole moments.
As pointed out in the talk, the molecular parameter values are very sensitive to the molecular microenvironment thus allowing for investigation of thin details of enegry transfer processes in excited molecules characterized by: anisotropic distribution of molecular axes, lifetimes, rotation correlation times, and the dynamics of nonadiabatic transitions between different potential energy surfaces. As shown, investigation of polarized fluorescence from molecular probes imbedded into biological structures opens a new information channel on protein structure, folding, hydration, and on the mechanizms of redox reactions in living organisms.
1. P. S. Shternin, K.-H. Gericke, O. S. Vasyutinskii, Molecular Physics, 2010, 108(7), 813.
2. S. Denicke, K.-H. Gericke, A. G. Smolin, P. S. Shternin, O. S. Vasyutinskii, J. Phys. Chem. A 2010, 114, 9681.
3. S. Herbrich, K.-H. Gericke, A. G. Smolin, O. S. Vasyutinskii, J. Phys. Chem. A. 2014, 118, 5248.
4. S. Herbrich, T. Al-Hadhuri, K.-H. Gericke, P. S. Shternin, A. G. Smolin, O. S. Vasyutinskii, J. Chem. Phys. 2015, 142, 024310.
5. M. E. Sasin, A. G. Smolin, K.-H. Gericke, E. Tokunaga, O. S. Vasyutinskii, PCCP, 2018, V.20, pp. 19922.
January 10, 2019 at 11.30 am in AG-80
Title :
Medium Matters: Dynamics of Molecules in a Confined Space
Abstract :
From time immemorial it is well known that curtailment of freedom often leads to changes in the behaviour of living beings. Similar restriction of freedom leads to selectivity in the chemical behaviour of molecules embedded in biological systems. Extending these well-known behaviours, supramolecular chemists have established that even small molecules upon confinement in synthetic hosts exhibit behaviour distinctly different from the ones in a bulk isotropic solution.
In this lecture the role a “Medium” in bringing about changes in the well-established behaviour of excited molecules would be illustrated with select examples. Results of steady state and ultrafast experiments will be presented that highlight how the confinement alters the excited state dynamics of molecules such as stilbenes, azobenzenes, anthracene, dibenzyl ketones etc. Another reaction to be discussed concerns with electron transfer and spin transfer that play a fundamental role in a number of biological events including photosynthesis. Examples and ultrafast dynamics of electron and spin transfer between a confined and a free molecule would be presented.
The main message of the talk is that molecules like humans behave differently when confined within synthetic cages.
Selected references
[1] V. Ramamurthy, S. Jockusch and M. Porel, Langmuir, 2015, 31, 5554-5570
[2] V. Ramamurthy, Acc. Chem. Res. 2015, 48, 2904-2917.
[3] A. Mohan Raj, M. Porel, P. Mukherjee, X. Ma, R. Choudhury, E. Galoppini, P. Sen and V. Ramamurthy, J. Phys. Chem. C, 2017, 121, 20205−20216.
[4] C-H. Chuang, M. Porel, R. Choudhury, C. Burda and V. Ramamurthy, J. Phys. Chem. B, 2018, 122, 328−337.
[5] C. J. Otolski, A. Mohan Raj, V. Ramamurthy and C.G. Elles, J. Phys. Chem. Lett. 2019, 10, 121−127
January 2, 2019 at 11.30 am in AG-80
Title :
L-Amino acid Based Polyester Nanocarriers for Drug Delivery and Bio-imaging
Abstract :
The past generation therapeutic agents are increasingly failing in combating new-age threats. Therapeutics based on polymers are advantageous as they possess advanced targeting, can target hard to reach agents, and carry multiple cargos of conflicting nature. These can be extremely selective, owing to several phenomena such as Enhanced Permeation (EPR) effect and carrying multiple cargoes in a single particle, which can have synergistic effects, leaving them more potent than any of the medicine alone.
L-Amino acid-based synthetic polypeptides non-peptides are extensively explored for biomedical applications owing to their structural diversity and biocompatibility. My talk is aimed to explore new classes of amphiphilic and biodegradable polyester and their fluorescent nano-assemblies based on natural L-aspartic acid resources for accomplishing anticancer drug delivery and intracellular bioimaging in cancer cells. These polymers were designed with the dual response to acidic conditions and enzyme-rich environment stimuli. Different therapeutically active drugs were loaded into the polymer scaffolds, and their cytotoxicity was studied in the cancer cell lines.
The uptakes of these drugs were monitored using confocal microscopy. L-amino acid-based amphiphilic luminescent polyester was developed using π- conjugated oligo-phenylenevinylene (OPV) custom made diols, while Aggregation induced emission (AIE) capable hydroxyl functionalized tetraphenylethyelene (TPE) diol was tailor-made through multi-step reaction and was subjected to melt transesterification with L-aspartic acid monomer to yield new blue-luminescent amphiphilic polyesters.
Hydroxyl and carboxylic functionalized polyesters were also synthesized. The hydrophilic hydroxyl and carboxylic groups along with the hydrophobic aliphatic backbone made these polymer amphiphilic in nature and enabled these to self-assemble into spherical nanoparticles in water, which exhibited superior encapsulation capabilities to load wide ranges of both water-soluble and water-insoluble anticancer drugs and fluorophores. The amphiphilic polyesters designed and developed based on L-aspartic acid residues presented in the talk are new entries as enzymatic-biodegradable polymers in the literature, and the custom-designed OPV-tagged and TPE-tagged fluorescent polymers are excellent nano-scaffolds for constructing a wide range of FRET probes with drugs and fluorophores which could be employed for early diagnostics of cancer and other bio-imaging applications. Thus, the work opens up a new platform of opportunities in the biomaterials arena based on L-Amino acid polymers.
December 23, 2019 at 2.30 pm in AG-80
Title :
Design and Development of Optical Probes for Tracking Essential and Toxic Metal Ions
December 19, 2019 at 2.30 pm in AG-80
Title :
Carbenes in a Supersonic Jet Expansion
Abstract :
Hydrogen Bond (HB) is one of the important intermolecular forces and is ubiquitous in Chemistry and Biology. Since it has strong directional nature it plays an important role in supramolecular chemistry as well as molecular recognition. These H-bonds play a vital role in determining the structure of proteins and supramolecules and there is evidence of these interactions in literature.
Among different reactive intermediates, Carbene being neutral and highly electron-deficient species play a significant role in various organic transformations. Hydrogen bonding that involves carbene as a hydrogen acceptor is very poorly documented in the literature.1
For instance, N-heterocyclic carbene carbon (singlet ground state) is highly nucleophilic due to adjacent nitrogen centres. Such electron-rich nucleophilic species can act as powerful Lewis bases. Water, being proton donor, can interact with Lewis bases like nucleophilic carbenes to form the strong hydrogen-bonded complex.
References
1.P. Costa, W. Sander, Angew. Chem. Int. Ed. 53 (2014), 5122-5125.
December 12, 2019 at 2.30 pm in AG-80
Title :
Utility of Natural Product Biosynthetic Enzymes for Drug Discovery
Abstract :
Dr. Singh is interested in the structural diversification of natural products to develop drug candidates with biological activity against cancer and infectious diseases. Her research focuses on utility and rationally engineering enzymes to modify substrate acceptability profiles and develop novel drugs with improved activity. Natural products and their derivatives account for about three-quarters of the approved drugs on the market. Using conventional chemical synthesis to structurally diversify complex natural products can be challenging. To overcome this challenge, the Singh Laboratory engineers enzymes for proficiency, promiscuity, or altered substrate specificity, capable of performing regio- and stereo-specific transformations in order to generate a library of new drug-like molecules for screening. Recently, she has developed a platform for drug discovery through engineering the substrate specificity of prenyltransferases, a class of natural product late-stage modification enzymes. In this seminar, she will discuss the development of this prenyltransferase-based chemoenzymatic platform to diversify natural products with a library of novel substrates in order to generate therapeutically relevant molecules with enhanced activity against antimicrobial-resistant bacterial strains. Dr. Singh obtained her PhD from the Tata Institute of Fundamental Research, and subsequently pursued post-doctoral research at the Memorial Sloan Kettering Cancer Center in the United States, and Utrecht University in the Netherlands.
December 2, 2019 at 4.00 pm in AG-69
Title :
Cell Permeable Ratiometric Fluorescent Sensor for Detecting Signal Mediating Phospholipids
November 29, 2019 at 2.30 pm in AG-66
Title :
Publishing from an Editor's Viewpoint - Insider Tips for Successful Submissions
November 28, 2019 at 3.00 pm in AG-80
Title :
Significance of defect engineering and hetero-junction engineering to improve the photoelectrochemical properties of ZnO nanorods photoanode
Abstract :
The significance of defect engineering in tuning the visible light driven photoelectrochemical properties due to alkali metal (Li, Na, K) doping into ZnO nanorods (NRs) photoanode is investigated. Large concentration of oxygen-vacancies introduced because of alkali doping serve as the light absorbing donor sites and also photoelectron recombination centres resulting enhanced photocurrent and hole separation in the valance band, respectively. The lattice strain developed in the nanorods due to doping contributes in easy electron transportation and mobility. Defect engineering also tunes the electronic structure of the photoanodes boosting charge carrier migration and reduced electron-hole pair recombination resulting enhanced oxygen evolution reaction. On the other hand, the design of multidimensional nano-heterostructures based photoelectrode is demonstrated by coupling the multilayered two-dimensional (2D) structure of MoS2 and MoO3 on the well aligned arrays of one-dimensional (1D) ZnO nanorods template expecting the effective synergic effects. The advantages of catalytically active sites of 2D layered structure of transition metal dichalcogenides/oxides is integrated with the distinctive dimensionality dependent phenomena of 1D structure to achieve enormous surface area for light harvesting and photoelectrochemical reaction along with favorable photocarrier dynamics required for water splitting.
References:
[1]K. Karmakar, A. Sarkar, K. Mandal and G. G.Khan. Investigating the role of oxygen vacancies and lattice strain defects on enhanced photoelectrochemical property of alkali metal (Li, Na and K) doped ZnO nanorods photoanodes. ChemElectroChem 2018, 5, 1147 –1152.
[2]K. Karmakar, D. Maity, D. Pal, G. G. Khan and K. Mandal. Photo-induced Exciton Dynamics and Broadband Light Harvesting in ZnO Nanorod Templated Multilayered 2D MoS2/MoO3 Photoanodes for Solar Fuel Generation. (Under Review)
November 28, 2019 at 2.30 pm in AG-80
Title :
Electrocatalysis and gas solid catalysis by Pt ions in perovskites: A comparison between supported and the doped catalysts
Abstract :
In this work, La1-xSrxCoO3 perovskite have been used as a host oxide for Pt doping and Pt supported system. The solution combustion and chemical reduction method have been adopted for the catalyst synthesis. Three selected reactions have been investigated in detail during the studies, namely the oxygen evolution reaction (OER), formic acid electro-oxidation and CO oxidation. The catalytic and electro-catalytic differences between the Pt doped and Pt-supported system has been studied. It was found that there are significant differences between the Pt-doped and Pt-supported systems for electro-catalytic and catalytic reactions. Activity of the catalyst depends on the particular reaction selected for comparison. We hope that the results presented in this work are a worthwhile contribution to catalysis.
November 25, 2019 at 4.00 pm in AG-69
Title :
Donor-Acceptor materials and their applications in OLEDs and solar cells
Abstract :
Donor-acceptor-donor (D-A-D) materials having acridone as acceptor and carbazole as donor were synthesized for opto-electronic applications. Steady state and time dependent emission studied provided insight on their possible thermally activated delayed fluorescence (TADF) behaviour. The singlet-triplet energy gap (∆EST) was found to be as low 0.2eV. These materials were used green TADF emitters in organic light emitting diode (OLED) devices. Furthermore, an exciplex emission at 465 nm was observed in the blends of these D-A-D with polyvinylcarbazole (PVK). OLEDs fabricated with blend showed blue electroluminescence which is matching well with the exciplex photoluminescence. Apart from D-A-D in OLEDs, application of new class of high dipole moment materials in solar cell will also be discussed.
November 18, 2019 at 4.00 pm in AG-69
Title :
Leadership and Organization Development
Abstract :
The training on "Leadership and Organization Development" was about the development of the mindset for women Scientists/Technologists. It is necessary to learn various leadership skills for enhancement of organization development. The perspective was to nurture and grow Scientists/Technologists' skills to further increase the growth of their organizations. Working well with others would enhance the team productivity and create a positive environment in organizations. Scientists as Leaders in any organization are required to build teams, envisage change and create vision, mentor followers, and nurture a culture of excellence. Hence, this programme on "Leadership and Organization Development" (under the "DISHA Programme for women in Science") is designed to impart necessary skills for Scientists/Technologists to assume leadership role in efficient way.
- March 16, 2021 at 4.30 pm (Via Zoom)
- March 15, 2021 at 4.30 pm (via Zoom)
- March 12, 2021 at 2.30 pm (Via Zoom)
- March 11, 2021 at 2.30 pm (Via Zoom)
- February 25, 2021 at 4.00 pm (Via Zoom)
- February 23, 2021 at 4.30 pm (via Zoom)
- February 22, 2021 at 4.30 pm (via Zoom)
- February 18, 2021 at 4.00 pm (Via Zoom)
- February 15, 2021 at 4.00 pm (via Zoom)
- February 9, 2021 at 2.30 pm (Via Zoom)
- February 4, 2021 at 3.00 pm (via Zoom)
- February 1, 2021 at 4.00 pm (via Zoom)
- January 28, 2021 at 10.00 am (via Zoom)
- January 25, 2021 at 4.00 pm (via Zoom)
- January 21, 2021 at 2.30 pm (via Zoom)
- January 18, 2021 at 4.00 pm (via Zoom)
- January 15, 2021 at 2.30 pm (via Zoom)
- January 11, 2021 at 4.00 pm (Via Zoom)
- December 22, 2020 at 4.30 pm (Via Zoom)
- December 21, 2020 at 4.30 pm (Via Zoom)
- December 15, 2020 at 5.30 pm (via zoom)
- December 14, 2020 at 5.30 pm (via zoom)
- November 23, 2020 at 4.00 pm (via Zoom)
- November 16, 2020 at 4.00 pm (Via Zoom)
- November 10, 2020 at 4.30 pm (via Zoom)
- November 9, 2020 at 4.30 pm (via Zoom)
- March 24, 2020 at 2.30 pm in AG-69
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- March 2, 2020 at 4.00 pm in AG-69
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- February 25, 2020 at 11.30 am in AG-80
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- February 18, 2020 at 3.00 pm in AG-80
- February 17, 2020 at 4.00 pm in AG-69
- February 18, 2020 at 2.30 pm in AG-80
- February 13, 2020 at 2.30 pm in AG-80
- February 11, 2020 at 2.30 pm in AG-80
- February 10, 2020 at 4.00 pm in AG-69
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- December 2, 2019 at 4.00 pm in AG-69
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- November 25, 2019 at 4.00 pm in AG-69
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- August 13, 2019 at 2.30 pm in AG-80
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- On June 19, 2019 at 2.30 pm in AG-80
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- February 28, 2019 1t 4.00 pm in AG-80
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- December 24, 2018 at 4.00 pm in AG-69
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- November 22, 2018 at 2.30 pm in AG-80
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- September 28, 2018 at 2.30 pm in AG-80
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- June 5, 2018 at 2.30 pm in AG-80
- May 29, 2018 at 2.30 pm in AG-69
- May 28, 2018 at 4.00 pm in AG-69
- May 24, 2018 at 2.30 pm in NMR Seminar Room
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- March 21, 2018 at 2.30 pm in AG-80
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- March 13, 2018 at 2.30 pm in AG-80
- March 12, 2018 at 4.00 pm in AG-69
- March 5, 2018 at 4.00 pm in AG-69
- February 28, 2018 at 2.30 pm in AG-66
- February 27, 2018 at 2.30 pm in AG-80
- February 26, 2018 at 4.00 pm in AG-69
- February 23, 2018 at 2.30 pm in AG-66
- Febrauary 22, 2018 at 2.30 pm in AG-80
- February 19, 2018 at 4.00 pm in AG-69
- February 13, 2018 at 2.30 pm in AG-66
- February 12, 2018 at 4.00 pm in AG-69
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- December 7, 2017 at 2.30 pm in B-333
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- November 27, 2017 at 4.00 pm in AG-69
- November 23, 2017 at 2.30 pm in AG-80
- November 20, 2017 at 4.00 pm in AG-69
- November 17, 2017 at 2.30 pm in AG-66
- November 16, 2017 at 2.30 pm in AG-80
- November 13, 2017 at 4.00 pm in AG-69
- November 8, 2017 at 2.30 pm in AG-80
- October 30, 2017 at 4.00 pm in AG-69
- October 27, 2017 at 10.00 am in AG-66
- October 16, 2017 at 4.00 pm in AG-69
- October 12, 2017 at 2.30 pm in AG-80
- September 26, 2017 at 2.30 pm in AG-66
- September 25, 2017 at 4.00 pm in AG-69
- September 18, 2017 at 4.00 pm in AG-69
- September 15, 2017 at 2.30 pm in AG-80
- September 14, 2017 at 2.30 pm in AG-80
- September 11, 2017 at 4.00 pm in AG-69
- August 28, 2017 at 4.00 pm in AG-69
- August 10, 2017 at 4.00 pm in AG-80
- August 3, 2017 at 4.00 pm in AG-80
- August 2, 2017 at 11.30 a.m.in AG-80
- July 31, 2017 at 4.00 pm in AG-69
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- July 17, 2017 at 4.00 pm in AG-69
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- May 9, 2017 at 2.00 pm in AG-69
- May 8, 2017 at 4.00 pm in AG-69
- May 1, 2017 at 4.00 pm in AG-69
- April 27, 2017 at 2.30 pm in AG-80
- April 24, 2017 at 4.00 pm in AG-69
- April 21, 2017 at 2.30 pm in AG-80
- April 20, 2017 at 2.30 pm in AG-80
- April 17, 2017 at 4.00 pm in AG-69
- April 12, 2017 at 2.30 pm in B-333 (DBS Seminar Room)
- April 10, 2017 at 4.00 pm in AG-69
- April 11, 2017 at 2.30 pm in AG-69
- April 7, 2017 at 2.30 pm in AG-80
- April 6, 2017 at 11.30 1m in AG-80
- April 3, 2017 at 4.00 pm in AG-69
- March 27, 2017 at 4.00 pm in AG-69
- March 23, 2017 at 4.00 pm in AG-80
- March 20, 2017 at 4.00 pm in AG-69
- March 16, 2017 at 2.30 pm in AG-80
- March 14, 2017 at 2.30 pm in AG-69
- March 9, 2017 at 4.00 pm in AG80
- March 6, 2017 at 4.00 pm in AG-69
- March 3, 2017 at 2.30 pm in AG-69
- March 2, 2017 at 2.30 pm in AG-80
- February 28, 2017 at 2.30 pm in AG-69
- February 27, 2017 at 4.00 pm in AG-69
- February 23, 2017 at 2.30 pm in AG-80
- February 21, 2017 at 2.30 pm in AG-69
- February 20, 2017 at 4.00 pm in AG-69
- February 17, 2017 at 2.30 pm in AG-69
- February 16, 2017 at 2.30 pm in AG-80
- February 15, 2017 at 2.30 pm in AG-80
- February 14, 2017 at 2.30 pm in AG-69
- February 13, 2017 at 4.00 pm in AG-69
- February 7, 2017 at 2.30 pm in AG-69
- February 6, 2017 at 4.00 pm in AG-69
- February 3, 2017 at 2.30 pm in AG-69
- February 2, 2017 at 2.30 pm in AG-80
- January 30, 2017 at 4.00 pm in AG-69
- January 25, 2017 at 11.00 a.m. in AG-80
- January 24, 2017 at 2.30 pm in AG-80
- January 23, 2017 at 4.00 pm in AG-69
- January 20, 2017 at 2.30 pm in AG-69
- January 19, 2017 at 2.30 pm in AG-69
- January 16, 2017 at 4.00 pm in AG-69
- January 5, 2017 at 2.30 pm in AG-80
- January 3, 2017 at 2.30 pm in AG-69
- December 13, 2016 at 2.30 pm in AG-69
- December 5, 2016 at 4.00 pm in AG-69
- November 28, 2016 at 2.30 pm in B-333 (DBS Seminar R00m)
- November 21, 2016 at 4.00 pm in AG-69
- November 16, 2016 at 2.30 pm in B-333 (DBS Seminar R00m)
- November 15, 2016 at 2.30 pm in B-333 (DBS Seminar Room)
- November 7, 2016 at 4.00 pm in AG-69
- November 4, 2016 at 2.30 pm in AG-66
- October 21, 2016 at 2.30 pm. in AG-66
- October 17, 2016 at 4.00 pm in AG-69
- October 3, 2016 at 4.00 pm in AG-69
- September 20, 2016 at 2.30 pm in AG-69
- September 19, 2016 at 4.00 pm in AG-69
- September 15, 2016 at 2.30 pm in AG-80
- August 9, 2016 at 4.00 pm in AG-80
- May 9, 2016 at 4.00 pm in AG-69
- May 6, 2016 at 2.30 pm in AG-80
- May 5, 2016 at 2.30 pm in AG-80
- May 2, 2016 at 4.00 pm in AG-69
- April 25, 2016 at 4.00 pm in AG-69
- April 21, 2016 at 2.30 pm in AG-80
- April 18, 2016 at 4.00 pm in AG-69
- April 11, 2016 at 4.00 pm in AG-69
- April 4, 2016 at 4.00 pm in AG-69
- March 28, 2016 at 4.00 pm in AG-69
- February 29, 2016 at 4.00 pm in AG-69
- February 26, 2016 at 2.30 pm in AG-80
- February 25, 2016 at 2.30 pm in AG-80
- February 22, 2016 at 2.30 pm in AG-66
- February 16, 2016 at 2.30 pm in AG-80
- February 15, 2016 at 4.00 pm in AG-69
- February 8, 2016 at 4.00 pm in AG-69
- January 21, 2016 at 2.30 pm in AG-80
- January 18, 2016 at 4.00 pm in AG-69
- January 15, 2016 at 11.00 a.m. in AG-80
- January 12, 2016 at 11.30 am in D-406
- January 11, 2016 at 4.00 pm in AG-69
- January 11, 2016 at 11.30 am in D-406
- January 4, 2016 at 4.00 pm in AG-69
- December 7, 2015 at 4.00 pm in AG-69
- November 30, 2015 at 4.00 pm in AG-69
- November 23, 2015 at 4.00 pm in AG-69
- November 2, 2015 at 4.00 pm in AG-69
- October 28, 2015 at 2.30 pm in AG-80
- October 27, 2015 at 2.30 pm in AG-80
- October 26, 2015 at 4.00 pm in AG-69
- October 12, 2015 at 4.00 pm in AG-69
- October 5, 2015 at 4.00 pm in AG-69
- September 28, 2015 at 4.00 pm in AG-69
- September 24, 2015 at 2.30 pm in AG-66
- September 23, 2015 at 2.30 pm in AG-66
- September 14, 2015 at 4.00 pm in AG-69
- September 10, 2015 at 2.30 pm in AG-66
- September 9, 2015 at 2.30 pm in AG-66
- September 7, 2015 at 4.00 pm in AG-69
- August 31, 2015 at 4.00 pm in AG-69
- August 25. 2015 at 2.30 pm in AG-69
- August 17, 2015 at 4.00 pm in AG-69
- August 12, 2015 at 11.00 am in AG-80
- August 11, 2015 at 2.30 pm in AG-80
- August 10, 2015 at 4.00 pm in AG-69
- August 3, 2015 at 4.00 pm in AG-69
- July 31, 2015 at 11.30 am in AG-80
- July 30, 2015 at 2.30 pm in D-406
- July 28, 2015 at 2.30 pm in AG-69
- July 27, 2015 at 11.30 am in AG-66
- July 20, 2015 at 4.00 pm in AG-69
- July 13, 2015 at 4.00 pm in AG-69
- July 6, 2015 at 4.00 pm in AG-69
- June 29, 2015 at 4.00 pm in AG-69
- June 25, 2015 at 2.30 pm in AG-80
- June 22, 2015 at 4.00 pm in AG-69
- June 15, 2015 at 11.30 am in AG-80
- June 8, 2015 at 4.00 pm in AG-69
- June 1, 2015 at 4.00 pm in AG-69
- May 27, 2015 at 2.30 pm in AG-80
- May 25, 2015 at 4.00 pm in AG-69
- May 21, 2015 at 2.30 pm in AG-80
- May 20, 2015 at 2.30 pm in AG-80
- May 19, 2015 at 2.30 pm in AG-80
- May 18, 2015 at 4.00 pm in AG-69
- May 14, 2015 at 2.30 pm in AG-80
- May 12, 2015 at 2.30 pm in AG-69
- May 11, 2015 at 4.00 pm in AG-69
- May 4, 2015 at 11.00 am in AG-80
- April 30, 2015 at 4.00 pm in AG-80
- April 20, 2015 at 4.00 pm in AG-69
- April 16, 2015 at 2.30 pm in AG-80
- April 13, 2015 at 4.00 pm in AG-69
- April 6, 2015 at 4.00 pm in AG-69
- March 30, 2015 at 4.00 pm in AG-69
- March 23, 2015 at 4.00 pm in AG-69
- March 18, 2015 at 2.30 pm in AG-69
- March 11, 2015 at 2.30 pm in AG-69
- March 10, 2015 at 2.30 pm in AG-69
- March 9, 2015 at 4.00 pm in AG-69
- March 5, 2015 at 4.00 pm in AG-80
- March 2, 2015 at 4.00 pm in AG-69
- March 2, 2015 at 11.00 a.m. in AG-80
- February 23, 2015 at 4.00 pm in AG-69
- February 20, 2015 at 3.00 pm in AG-80
- February 16, 2015 at 4.00 pm in AG-69
- February 12, 2015 at 4.00 pm in AG-80
- February 9, 2015 at 4.00 pm in AG-69
- February 3, 2015 at 2.30 pm in AG-69
- February 2, 2015 at 4.00 pm in AG-69
- January 27, 2015 at 2.30 pm in AG-69
- January 21, 2015 at 2.30 pm in AG-80
- January 19, 2015 at 2.30 pm in Guest House Conference Room
- January 12, 2015 at 4.00 pm in AG-69
- January 6, 2015 at 2.30 pm in AG-69
- January 5, 2015 at 4.00 pm in AG-69
- December 22, 2014 at 4.00 pm in AG-69
- December 8, 2014 at 4.00 pm in AG-66
- December 2, 2014 at 2.30 pm in AG-69
- December 1, 2014 at 4.00 pm in AG-69
- November 24, 2014 at 4.00 pm in AG-69
- November 21, 2014 at 2.30 pm in AG-69
- November 17, 2014 at 4.00 pm in AG-69
- November 13, 2014 at 11.30 am in AG-66
- November 11, 2014 at 2.30 pm in AG-69
- November 10, 2014 at 4.00 pm in AG-69
- November 3, 2014 at 2.30 pm in NMR Conference Room
- October 28, 2014 at 2.30 pm in AG-69
- October 28, 2014 at 11.30 am in AG-80
- October 27, 2014 at 4.00 pm in AG-69
- October 20, 2014 at 4.00 pm in AG-69
- October 13, 2014 at 4.00 pm in AG-69
- September 12, 2014 at 2.30 pm in AG-80
- September 8, 2014 at 4.00 pm in AG-69
- August 25, 2014 at 4.00 pm in AG-69
- August 22, 2.30 pm in AG-80
- August 21, 2.30 pm in AG-80
- August 13, 2.30 pm in AG-69
- August 11, 2014 at 4.00 pm in AG-69
- August 4, 2014 at 4.00 pm in AG-69
- July 28, 2014 at 4.00 pm in AG-69
- July 21, 2014 at 4.00 pm in AG-69
- June 16, 2014 at 4.00 pm in AG-69
- May 30, 2014 at 2.30 pm in AG-80
- May 29, 2014 at 4.00 pm in AG-80
- May 27, 2014 at 2.30 pm in AG-69
- May 26, 2014 at 4.00 pm in AG-69
- May 22, 2014 at 2.30 pm in AG-80
- May 21, 2014 at 2.30 pm in AG-69
- May 19, 2014 at 4.00 pm in AG-80
- May 13, 2014 at 2.30 pm in AG-69
- May 12, 2014 at 4.00 pm in AG-69
- April 28, 2014 at 4.00 pm in AG-69
- April 22, 2014 at 2.30 pm in AG-69
- April 21, 2014 at 4.00 pm in AG-69
- April 14, 2014 at 4.00 pm in AG-69
- April 11, 2014 at 2.30 pm in AG-80
- April 10, 2014 at 4.00 pm in AG-80
- April 7, 2014 at 4.00 pm in AG-69
- March 24, 2014 at 4.00 pm in AG-69
- March 20, 2014 at 2.30 pm in AG-80
- March 10, 2014 at 4.00 pm in AG-69
- March 3, 2014 at 4.00 pm in AG-69
- February 25, 2014 at 2.30 pm in B-333 (DBS Seminar Room)
- February 19, 2014 at 2.30 pm in AG-69
- February 18, 2014 at 2.30 pm in AG-69
- February 17, 2014 at 4.00 pm in AG-69
- February 12, 2014 at 2.30 pm in D-406
- February 11, 2013 at 2.30 pm in AG-66
- January 31, 2014 at 2.30 pm in AG-80
- January 30, 2014 at 2.30 pm in AG-69
- January 30, 2014 at 11.30 am in NMR Seminar Room
- January 27, 2014, at 4.00 pm in AG-69
- January 23, 2014 at 2.30 pm in AG-80
- January 20, 2014, at 2.30 pm in AG69
- January 13, 2014 at 4.00 pm in AG-69
- January 6, 2014 at 4.00 pm in AG-69
- December 26, 2013 at 11.30 am in NMR Conference Room
- December 19, 2013 at 2.30 pm in AG-80
- December 17, 2013 at 11.30 am in NMR Conference Room
- December 16, 2013 at 4.00 pm in AG-69
- December 16, 2013 at 11.30 am in AG-80
- December 10, 2013 at 2.30 pm in AG80:
- December 10, 2013 at 11.30 am in AG-80
- December 9, 2013 at 4.00 pm in AG-69
- December 3, 2013 at 4.00 pm in AG-80
- November 11, 2013 at 4.00 pm in AG-69
- October 29, 2013 at 11.30 am in AG-80
- October 28, 2013 at 4.00 pm in AG-69
- October 22, 2013 at 11.30 am in AG-80
- October 21, 2013 at 4.00 pm in AG-69
- October 15, 2013 at 11.30 am in AG-80
- October 14, 2013 at 4.00 pm in AG-69
- September 26th & 27th, 2013 in AG-66
- September 23, 4.00 pm in AG-69
- August 19, 2013 at 4.00 pm in AG69
- August 5, 2013 at 4.00 pm in AG69
- July 1, 2013 at 4.00 pm in AG69
- June 17, 2013 at 4.00 pm in AG69
- June 10, 2013 at 4.00 pm in AG69
- May 27, 2013 at 4.00 pm in AG69
- May 6, 2013 at 4.00 pm in AG66
- May 9, 2013 at 2.30 pm in AG80
- April 29, 2013 at 4.00 pm in AG69
- April 22, 2013 at 4.00 pm in AG69
- April 18, 2013 at 2.30 pm in AG80
- April 12, 2013 at 2.30 pm in AG80
- April 15, 2013 at 4.00 pm in AG69
- April 11, 2013 at 2.30 pm in AG80
- April 10, 2013 at 11.30 am in NMR Conference Room
- April 8, 2013 at 4.00 pm in AG69
- April 5, 2013 at 2.30 pm in AG69
- April 3, 2013 at 2.30 pm in AG69
- March 28, 2013 at 4.00 pm in AG80
- March 25, 2013 at 4.00 pm in AG69
- March 22, 2013 at 2.30 pm in AG80
- March 21, 2013 at 2.30 pm in AG80
- March 18, 2013 at 4.00 pm in AG69
- March 14, 2013 at 2.30 pm in AG80
- March 11, 2013 at 4.00 pm in AG69
- March 6, 2013 at 2.30 pm in NMR Conference Room
- March 5, 2013 at 2.30 pm in DBS Seminar Room (B-333)
- March 4, 2013 at 4.00 pm in AG66
- February 27, 2013 at 11.30 am in AG66
- February 25, 2013 at 2.30 pm in AG69
- February 18, 2013 at 4.00 pm in AG69
- February 15, 2013 at 2.30 pm in AG80
- February 14, 2013 at 2.30 pm in AG80
- January 30, 2013 at 11.30 am in AG80
- January 29, 2013 at 4.00 pm in AG80
- January 28, 2013 at 4.00 pm in AG69
- January 23, 2013 at 11.30 am in AG69
- January 21, 2013 at 4.00 pm in AG69
- January 17, 2013 at 2.30 pm in AG80
- January 14, 2013 at 4.00 pm in AG69
- January 7, 2013 at 4.00 pm in AG80
- May 20, 2013 at 4.00 pm in AG69
- June 3, 2013 at 4.00 pm in AG69