12/10/2020 |
| 11:00 13:00 |
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Thermally triggered nanohybrids for pancreatic cancer therapy
Clare Hoskins
(University of Strathclyde)
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Mais informações em breve
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| 14:00 16:00 |
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Emerging DBPs: New discoveries, potential risks, and promising solutions
Susan D. Richardson
(University of South Carolina, USA)
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ABSTRACT
Drinking water disinfection by-products (DBPs) are an unintended consequence of using chemical disinfectants to kill harmful pathogens in water. DBPs are formed by the reaction of disinfectants with naturally occurring organic matter, bromide, and iodide, as well as from anthropogenic pollutants, such as pharmaceuticals and pesticides. DBPs are one of a small handful of environmental contaminants that have been definitively linked to adverse human health effects in epidemiologic studies. Several DBPs, such as trihalomethanes (THMs), haloacetic acids (HAAs), bromate, and chlorite, are regulated in the U.S. and in other countries, but other "emerging" DBPs, such as iodo-acids, halobenzoquinones, halonitromethanes, haloamides, halofuranones, and nitrosamines are not widely regulated. This presentation will provide a state-of-the-science overview of the formation of DBPs, along with new identifications made using GC- and LC-high resolution-MS, including DBPs formed by domestic and hydraulic fracturing wastewater impacts. Finally, new research on determining the important drivers of toxicity in drinking water will be presented, along with promising solutions for improving the safety of drinking water.
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| 17:00 19:00 |
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Nanostructured functional materials for environmental protection: sensors, treatment of wastewaters and CO2 removal
Maria Valnice Boldrin
(IQAr-UNESP)
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Mais informações em breve
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13/10/2020 |
| 8:00 10:00 |
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LML134, a short-acting H3R inverse agonists to enhance wakefulness
Yves P Auberson
(Novartis Institutes for BioMedical Research, Basel, Switzerland)
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ABSTRACT
Histamine H3 receptor (H3R) inverse agonists are efficacious for the treatment of narcolepsy, but have a long duration of action. This leads to insomnia on the night following administration. Our aim was to identify a drug candidate with high efficacy (as determined by a receptor occupancy above 85%), and a fast elimination from the receptor in the brain, to avoid unwanted effects.
I will present the medicinal chemistry program that led to the identification of the clinical development compound LML134, and how the team solved the issues associated with brain penetration, receptor binding kinetics, hERG, phospholipidosis and a number of sometimes surprising challenges that appeared along the way. The comparison of the preclinical profile of LML134 with its phase I clinical data will show how the strategy of addressing toxicity alerts early, and optimizing receptor occupancy, allowed to reach the criteria set at the onset of this program: safety, efficacy, and a short duration of action.
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| 11:00 13:00 |
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Recent advances in carbon electrode materials and their application in electrochemistry
Greg M. Swain
(Michigan State University)
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Mais informações em breve
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| 14:00 16:00 |
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Actinide-based Buckyball Maracas: Fullerene Nanocontainers that Stabilize Unusual Atoms and Clusters Inside
Luis A. Echegoyen
(American Chemical Society)
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ABSTRACT
 For the past two years we have been involved in the synthesis and characterization of new Uranium-based endohedral fullerenes and have obtained X-Ray crystal structures for several of these compounds. Some are mono-uranium species, U@C2n, while some are di-uranium compounds (see structure at the left), U2@C2n.1 Very recently we isolated two new mono-uranium compounds that violate the Isolated Pentagon Rule (IPR) with a C76 and a C80 cage possessing fused five-membered rings (pentalenes) on their surfaces.2 Still other endohedral structures are much more interesting and totally unanticipated, with formula U2X@C2n, where X= C, O, S or N and 2n= 72, 78 or 80, which reveal interesting metal-cage interactions and totally unprecedented clusters trapped inside.  Some of the carbide compounds have been crystallized and the encapsulated U2C cluster (in U=C=U@C80) exhibits unprecedented bonding with totally unanticipated properties (see structure to the right). 3
Finally, we have found that bis-porphyrin capsules exhibit exquisitely selective supramolecular binding for several of these uranium-based endohedral fullerene compounds.4
The synthesis, purification and characterization of these interesting endohedral fullerenes will be presented and discussed, along with very recent results about uranium-based endohedrals.
References
1. Zhang, X.; Wang, Y.; Morales-Martínez, R.; Zhong, J.; de Graaf, C.; Rodríguez-Fortea, A.; Poblet, J. M.; Echegoyen, L.; Feng, L.; Chen, N., J. Am. Chem. Soc. 2018, 140 (11), 3907-3915.
2. Cai, W.; Abella, L.; Zhuang, J.; Zhang, X.; Feng, L.; Wang, Y.; Morales-Martínez, R.; Esper, R.; Boero, M.; Metta-Magaña, A.; Rodríguez-Fortea, A.; Poblet, J. M.; Echegoyen, L.; Chen, N., J. Am. Chem. Soc. 2018, 140 (51), 18039-18050.
3. Zhang, X.; Li, W.; Feng, L.; Chen, X.; Hansen, A.; Grimme, S.; Fortier, S.; Sergentu, D.-C.; Duignan, T. J.; Autschbach, J.; Wang, S.; Wang, Y.; Velkos, G.; Popov, A. A.; Aghdassi, N.; Duhm, S.; Li, X.; Li, J.; Echegoyen, L.; Schwarz, W. H. E.; Chen, N., Nature Comm. 2018, 9 (1), 2753.
4. a) Fuertes-Espinosa, C.; Gómez-Torres, A.; Morales-Martínez, R.; Rodríguez-Fortea, A.; García-Simón, C.; Gándara, F.; Imaz, I.; Juanhuix, J.; Maspoch, D.; Poblet, J. M.; Echegoyen, L.; Ribas, X., Angew. Chem. Int. Ed. 2018, 57 (35), 11294-11299; b) Fuertes, C.; Murillo, J.; Soto, M. E.; Morales-Martines, R.; Rodriguez-Fortea, A.; Poblet, J. M.; Echegoyen, L. and Ribas, X., Nanoscale, 11, 23035-23041, 2019.
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14/10/2020 |
| 8:00 10:00 |
CONFERÊNCIA EMPRESA |
Plano acadêmico: o recurso que você precisa para se destacar em suas pesquisas!
Adelson Silva
(Gerente de Produto e Plano Acadêmico - Agilent Technologies Brasil Ltda)
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Mais informações em breve
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| 11:00 13:00 |
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Pharmacophore-Directed Retrosynthesis: Marrying Natural Product Synthesis and Biomechanistic Studies
Daniel Romo
(Baylor University, Texas)
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Mais informações em breve
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| 14:00 16:00
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CONFERÊNCIA EMPRESA |
Inovação em Tecnologia Analítica na luta contra o Covid-19
Jane Finzi
(Waters)
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ABSTRACT
Estamos enfrentando um período desafiador com a Pandemia do Covid-19 e a necessidade de desenvolvimentos e inovações na área de saúde é sem precedentes. A velocidade com que novas terapias, vacinas e testes diagnósticos estão surgindo é incomparável com o que já observamos em nossa história e a contribuição da química analítica pode ser crucial. Nesta palestra a Waters apresentará soluções em cromatografia líquida e em espectrometria de massas que podem ajudar no desenvolvimento de novas terapias, como por exemplo, utilização de produtos naturais no combate à doença, controle de qualidade de vacinas e dos insumos usados em testes diagnósticos, além da pesquisa de novas técnicas usando ionização ambiente e espectrometria de massas para testagem da população.
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| 17:00 19:00 |
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Materiais nanoestruturados como plataforma para fotônica
Sidney Jose Lima Ribeiro
(IQAr-UNESP)
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Mais informações em breve
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15/10/2020 |
| 8:00 10:00 |
CONFERÊNCIA EMPRESA |
Microscopias FTIR, Raman e Eletrônica com EDX na aplicação de Microplásticos e Polímeros
Luciana Pataro
(Especialista em Aplicações na área de Espectroscopia Molecular para América Latina na Thermo Fisher Scientific)
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| Felipe Medeiros
(Gerente de Canal na área de Microscopia Eletrônica para América do Sul na Thermo Fisher Scientific)
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Mais informações em breve
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| 11:00 13:00 |
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Sobre as finalidades de se ensinar ciências/química e as finalidades de se fazer ciências/química
Agustina Rosa Echeverría
(UFG)
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ABSTRACT
Há argumentos, largamente registrados na literatura científica da Educação em Ciências, sobre as finalidades do seu ensino. Na exposição proposta pretendo argumentar em defesa do "fazer ciências" que se relaciona com projetos maiores e é um indicador do papel determinante das ciências na configuração das nações.
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| 14:00 16:00 |
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Bioinorganic chemistry as an enabling technology
Angela Casini
(Technical University of Munich)
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ABSTRACT
The purpose of this seminar is to provide evidence of how bioinorganic chemistry knowledge can be applied to drive change in technologies in diverse areas of chemical science.
As a first example, the case of gold-based catalysts will be discussed since they offer the opportunity of modulating bio-processes through reactions that are complementary to enzymes, and have emerged as promising tools for bio-orthogonal transformations, endowed with excellent reactivity and selectivity, compatibility within aqueous reaction medium, fast kinetics of ligand exchange reactions and mild reaction conditions.[1] Thus, this lecture will summarize recent findings from our group on Au(III)-catalyzed reductive elimination in aqueous media, providing the proof-of-concept for the use of organogold compounds cyclometalated Au(III) C^N complexes - for the efficient modification of proteins through CS cross coupling.[2] Furthermore, the obtained mechanistic insights have allowed to extend the cross-coupling concept to other substrates, to enable CP and CC bond formation under mild conditions.[3] These results could be relevant to the development of proteomic profiling of cysteine residues and of their oxidation states, as well as for the design of catalysts in different cross-coupling processes in aqueous environment.
Moreover, a second example on the application of bioconjugated photoactivable Ru(II) complexes to implement mass spectrometry imaging (MSI) will be included. Specifically, the proof-of-concept on a novel laser desorption ionization (LDI)-MSI strategy using photocleavable Ru(II) polypyridine complexes as mass-tags for imaging of integrins avß3 in human cancer tissues will be presented.[4]
[1] Thomas, S.R.; Casini, A.; Curr.Opin.Chem.Biol., 2020, 12, 3456.
[2] Wenzel, M.N.; Bonsignore, R.; Thomas, S.R.; Bourissou, D.; Barone, G.; Casini, A.; Chemistry, 2019, 25, 7628.
[3] Bonsignore, R.; Thomas S.R.; Klooster, W.; Coles, S.; Bourissou, D.; Jenkins, R.; Barone, G.; Casini, A.; Chemistry, 2020, doi: 10.1002/chem.201905392.
[4] Han, J. et al; Chem. Commun., 2020, 56, 5941.
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16/10/2020 |
| 08:00 10:00 |
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Catalysis by transition metal complexes: a tool for sustainability
Eduardo Nicolau dos Santos
(UFMG)
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ABSTRACT
Catalysis is of utmost importance for the chemical industry. Through recent examples of our research, some fundaments of the catalysis by transition metal complexes (homogeneous catalysis) will be highlighted, including: - the synthesis of fine chemicals from bio renewable feedstock
- using an old, but still robust, workhorse of the chemical industry: the hydroformylation of olefins
- employing the well-defined ruthenium-ylidene complexes as catalysts for C-C double bond metathesis
Título: Catálise por complexos de metais de transição: uma ferramenta para a sustentabilidade
A catálise é de extrema importância para a indústria química. Através de resultados recentes de nossa pesquisa, alguns fundamentos da catálise por complexos de metais de transição (catálise homogênea) serão destacados, incluindo:
- a síntese de produtos da química fina a partir de matérias primas biorrenováveis
- o uso de uma velha, mas ainda forte, mula de carga da indústria química: a hidroformilação de olefinas
- o emprego de complexos de rutênio-ilideno de estrutura bem definida para a metátese de ligações duplas C-C
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