Estudo sobre o uso do pentacloreto de nióbio em reações multicomponentes para síntese de derivados de 4-ARIL-3,4-DI-Hidrocumarinas

Pós-graduação em Ciência e Tecnologia de Materiais - FC

Síntese, caracterização e avaliação da citotoxidade de complexos de 'Pd'(II) contendo o ligante 4,4´,5,5´ - tetrametil-2,2´-bis-imidazol

Pós-graduação em Química - IQ

Síntese de derivados 4-aril-3,4-di-hidrocumarínicos catalisada por NbCl5

Multicomponent reactions between phenols, β-diesters and benzaldehydes for the synthesis of 4-aryl-3,4-dihydrocoumarin derivatives were carried out under mild conditions (room temperature) and presented moderate yields (38-88%) and reasonable reaction times (2-4 days), using niobium pentachloride as a catalyst.

Estudo de aspectos químicos, biológicos e biossintéticos em Piper fuligineum Kunth(Piperaceae)

Pós-graduação em Química - IQ

Synthesis, characterization, thermal behavior, and DFT calculation of solid 1,4-bis(3-carboxy-3-oxo-prop-1-enyl) benzene of some trivalent lanthanides

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Synthesis and antimycobacterial activity of new pyrazolate-bridged dinuclear complexes of the type [Pd(mu-L)(N-3)(PPh3)](2) (PPh3 = triphenylphosphine; L = pyrazolates)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Refuge Update – March/April 2006, Volume 3, Number 2

Table of Contents: Energy Company Fine Benefits Ottawa Refuge, page 3 Hide and Seek…but Mostly Hide page 4 Focus on …Pollinators, page 10 Great Storytellers, page 18

5-(1-(4-phenyl)-3-(4-nitrophenyl)triazene)-10,15,20-triphenylporphyrin: a new triazene-porphyrin dye and its spectroelectrochemical properties

The new triazene-porphyrin dye 5-(1-(4-phenyl)-3-(4-nitrophenyl)triazene)-10,15,20-triphenylporphyrin, encompassing a reactive protonated triazene moiety, was prepared starting from meso-tetraphenylporphyrin (H2TPP), first converting it to the 5-(4-nitrophenyl)-10,15,20-triphenylporphyrin, then reducing to the 5-(4-aminophenyl)-10,15,20-tri(phenyl) porphyrin intermediate, and reacting with the diazonium salt of 4-nitroaniline; and characterized by spectroscopic and electrochemical methods. The absorption spectrum of the neutral species resembled the sum of H2TPP and of 1,3-bis(4-nitrophenyl) triazene spectrum, but the deprotonated anionic species showed more delocalized frontier orbitals, behaving as a push-pull system exhibiting triazenide-to-porphyrin charge-transfer transitions.

Evaluating methods for the isolation of marine-derived fungal strains and production of bioactive secondary metabolites

In the present investigation we evaluate methods for the isolation and growth of marine-derived fungal strains in artificial media for the production of secondary metabolites. Inoculation of marine macroorganisms fragments in Petri dishes proved to be the most convenient procedure for the isolation of the largest number of strains. Among the growth media used, 3% malt extract showed the best result for strains isolation and growth, and yielded the largest number of strains from marine macroorganisms. The percentage of strains isolated using each of the growth media which yielded cytotoxic and/or antibiotic extracts was in the range of 23-35%, regardless of the growth media used. Further investigation of extracts obtained from different marine-derived fungal strains yielded several bioactive secondary metabolites, among which (E)-4-methoxy-5-(3-methoxybut-1-enyl)-6-methyl-2H-pyran-2-one is a new metabolite isolated from the Penicillium paxilli strain Ma(G)K.

Within-plant distribution of 1,4-benzoxazin-3-ones contributes to herbivore niche differentiation in maize

Plant defences vary in space and time, which may translate into specific herbivore-foraging patterns and feeding niche differentiation. To date, little is known about the effect of secondary metabolite patterning on within-plant herbivore foraging. We investigated how variation in the major maize secondary metabolites, 1,4-benzoxazin-3-one derivatives (BXDs), affects the foraging behaviour of two leaf-chewing herbivores. BXD levels varied substantially within plants. Older leaves had higher levels of constitutive BXDs while younger leaves were consistently more inducible. These differences were observed independently of plant age, even though the concentrations of most BXDs declined markedly in older plants. Larvae of the well-adapted maize pest Spodoptera frugiperda preferred and grew better on young inducible leaves irrespective of plant age, while larvae of the generalist Spodoptera littoralis preferred and tended to grow better on old leaves. In BXD-free mutants, the differences in herbivore weight gain between old and young leaves were absent for both species, and leaf preferences of S. frugiperda were attenuated. In contrast, S. littoralis foraging patterns were not affected. In summary, our study shows that plant secondary metabolites differentially affect performance and foraging of adapted and non-adapted herbivores and thereby likely contribute to feeding niche differentiation

Na 1 Nachlass Max Horkheimer, 654 - "The Aftermath of National Socialism"; "National Socialism and Philosophy"; "The Idea of Philosophy"; "Programm einer Intereuropäischen Akademie" (p. IX 36a.1-4-IX 39.1-2)

"The Aftermath of National Socialism. On the Cultural Aspects of the Collapse of National Socialism". Vorlesungsreihe des Instituts für Sozialforschung, März 1945; 1. Vorlesungsankündigung und Typoskripte der Beiträge von: Theodor W. Adorno, "The Fate of the Arts" (= "What National Socialism Has Done to the Arts"); Frederick Pollock, "Prejudice and the Social Classes"; Leo Löwenthal, "The Aftermath of Totalitarian Terror". Bibliographie, Typoskripte, geheftet, mit eigenhändiger Korrektur von Frederick Pollock, 93 Blatt; 2. Vorlesungsankündigung, als Typoskript vervielfältigt, 1 Blatt; 3. Max Horkheimer: "Totalitarism and the Crisis of European Culture". Eigene Notizen zur Vorlesung, 3 Blatt; 4. Theodor W. Adorno: Notizen zur Vorlesungsreihe. Typoskript, 2 Blatt; Max Horkheimer: "National Socialism and Philosophy". Seminar Frühjahr 1945; 1. Protokolle zu den Sitzungen vom 5.2, 24.4., 1.5. und 8.5.1945. Typoskript mit eigenhändiger Korrektur, 16 Blatt; 2. Dasselbe. Gebunden, 16 Blatt; 3. Eigenhändige Notizen, 8 Blatt; Max Horkheimer: "The Idea of Philosophy". Vorlesung Winter 1945/46; 1. Eigenhändige Notizen, 3 Blatt; 2. Eigenhändige Notizen, 4 Blatt; 3. Eigenhändige Notizen, 2 Blatt; 4. Abschriften aus Werken unter anderem von Friedrich von Bezold, Karl Lamprecht, Richard Pietchman, Leopold von Ranke, Edwin R.A. Seligman. Typoskripte, 8 Blatt; 5. Paul Tillich: "Conscience in Western Thought and the Idea a Transmoral Conscience". Sonderdruck aus: Crozer Quarterly, Vol. XXII, Nr. 4, Oktober 1945, 6 Blatt; Max Horkheimer: Programm einer Intereuropäischen Akademie, 1944/45 (?); 1. Typoskriptfassungen, englisch. a) Typoskript, 18 Blatt b) Typoskript mit handschriftlicher Korrektur von Theodor W. Adorno (GS 12, S.195-213), 18 Blatt c) Typoskript (Kopie) mit handschriftliche Korrektur, 18 Blatt (Kopie 1989 aus der Hoover Institution, Standford, California) d) Typoskript mit eigenhändiger Korrektur, 17 Blatt e) Korrektur-Teilstücke, Typoskripte mit eigenhändiger Korrektur, 2 Blatt; 2. Zeitungsausschnitt 1944, 1 Blatt;

(Table 7) Fe**3+/Fe**2+ ratios in selected nontronite samples at DSDP Leg 70 Holes

Since its discovery in 1974 (Klitgord and Mudie, 1974), the Galapagos mounds hydrothermal field has received much attention. Sediment samples were taken during Leg 54 of the Deep Sea Drilling Project (DSDP) and by other expeditions to the area (e.g., Corliss et al., 1978). While a hydrothermal origin for the mounds sediments has been generally accepted, several different theories of origin for the mounds themselves have been proposed (e.g., Corliss et al., 1978; Natland et al., 1979; Williams et al., 1979). One of the aims of DSDP Leg 70 was to return to the mounds field and, using the new hydraulic piston cor er described elsewhere in this volume, to obtain more complete recovery of mounds sediments than had previously been possible. It was our hope that this would help in our understanding of the nature and origin of these deposits. In this chapter, we describe the results of chemical analysis of over 250 sediment samples taken during the course of Leg 70.