Results 21 to 30 of about 3,681 (218)

Litter Quality of Populus Species as Affected by Free-Air CO2 [PDF]

, 2009
The effect of elevated CO2 and nitrogen fertilization on the molecular chemistry of litter of three Populus species and associated soil organic matter (SOM) was investigated by pyrolysis-gas chromatography/mass spectrometry.
Buurman, P., Hoosbeek, M.R., Vermue, E.
core   +4 more sources

Tricyclic flavonoids with 1,3-dithiolium substructure

Beilstein Journal of Organic Chemistry, 2012
The synthesis of new 3-dithiocarbamic flavonoids has been accomplished by the reaction of the corresponding 2-hydroxyaryl dithiocarbamates with aminals. These flavonoids were obtained as a mixture of diastereoisomers, the anti isomer being the major one.
Lucian G. Bahrin, Peter G. Jones, Henning Hopf   +2 more
doaj   +1 more source

Photorelease of amino acids from novel thioxobenzo[f]benzopyran ester conjugates [PDF]

, 2011
Aiming at the enhancement of the performance of (9-methoxy-3-oxo-3H-benzo[f]benzopyran-1-yl) methyl ester as photocleavable protecting group for the carboxylic acid function at long-wavelengths, 9-methoxy-3-thioxo-3H-benzo[f]benzopyran-L-valine and L ...
Costa, Susana P. G., Gonçalves, M. Sameiro T., Piloto, Ana M., Soares, Ana M. S.   +3 more
core   +1 more source

Quantitative Structure–Activity Relationships of Natural-Product-Inspired, Aminoalkyl-Substituted 1-Benzopyrans as Novel Antiplasmodial Agents

Molecules, 2021
On the basis of the finding that various aminoalkyl-substituted chromene and chromane derivatives possess strong and highly selective in vitro bioactivity against Plasmodium falciparum, the pathogen responsible for tropical malaria, we performed a ...
Friederike M. Wunsch, Bernhard Wünsch, Freddy A. Bernal, Thomas J. Schmidt   +3 more
doaj   +1 more source

Differential effects of endothelin‐1 on the vasorelaxant properties of benzopyran and non‐benzopyran potassium channel openers [PDF]

British Journal of Pharmacology, 1992
. The effects of endothelin‐1 (ET‐1) on the vasorelaxant properties of structurally different potassium channel openers (PCOs), BRL‐38227, Ro 31–6930, SDZ PCO 400, EMD‐52692, RP‐49356 and pinacidil, were studied. . All PCOs evoked concentration‐related relaxations of ET‐1 (10 nm) or KCl (20 mm) contracted rat isolated aortic rings denuded of ...
K, Lawson, M, Barras, E, Zazzi-Sudriez, D J, Martin, J M, Armstrong, P E, Hicks   +5 more
openaire   +2 more sources

Synthesis of novel photochromic pyrans via palladium-mediated reactions

Beilstein Journal of Organic Chemistry, 2009
Photochromic pyrans for applications in material and life sciences were synthesized via palladium-mediated cyanation, carbonylation and Sonogashira cross-coupling starting from bromo-substituted naphthopyran 1 and benzopyrans 2a/b.
Christoph Böttcher, Gehad Zeyat, Saleh A. Ahmed, Elisabeth Irran, Thorben Cordes, Cord Elsner, Wolfgang Zinth, Karola Rueck-Braun   +7 more
doaj   +1 more source

Hypericum sp.: essential oil composition and biological activities [PDF]

, 2012
Phytochemical composition of Hypericum genus has been investigated for many years. In the recent past, studies on the essential oils (EO) of this genus have been progressing and many of them have reported interesting biological activities. Variations in
A Baruah, A Bertoli, A Bertoli, A Bertoli, A Cakir, A Cakir, A Cakir, A Ferraz, A Ferreira, A Guardo Di, A Kakhky, A Kirakosyan, A Kirakosyan, A Kornfeld, A Mourey, A Nahrstedt, A Pieroni, A Piovan, A Poutaraud, A Rančcić, A Sokmen, A Trovato, A Wójcik, A Đorđević, ABF Ferraz, AC Schmitt, ACP Dias, ACP Dias, ACP Dias, Ana P. Guedes, AP Guedes, AP Guedes, APM Bernardi, B Demirci, B Gudžic, B Gudžić, B Lange, B Prado, B Vinterhalter, B Öztürk, BA Silva, C Giuliani, C Mathis, C Mathis, C Mathis, CC Sánchez-Mateo, CC Sánchez-Mateo, D Fritz, D Ivanova, D Mockutė, D Schwarz, E Banchio, E Bombardelli, E Galati, E Tozlu, E Yildirim, EV Costa, F Bakkali, F Bougard, F Chen, F Conforti, F Demirci, F Maggi, F Souret, FR Pretto, FX Maquart, G Ferretti, G Franklin, G Franklin, G Franklin, G Kızıl, G Pintore, G-Q Zheng, G. Franklin, GM Kitanov, H Jayasuriyab, H Karim, HP Bais, I Abreu, I Kubo, I Schwob, I Schwob, I Schwob, J Camejo-Rodrigues, J Heilmann, J Koperdáková, J Radusiene, J Soelberg, JL Hartwell, K Adam, K Danova, K Helmja, K Hosni, K Ishiguro, K Morteza-Semnani, K Nakano, K Saeb, K Tawaha, KHC Baser, L Decosterd, L Maffi, L Panizi, L Pistelli, L Rocha, M Cardona, M Cardoso, M Couladis, M Couladis, M Cowan, M Moura, M Pavlović, M Spiteller, Manuel Fernandes-Ferreira, N Aligiannis, N Radulovic, N Robson, O Touafek, P Avato, P Avato, P Mercke, P Mukherjee, P Mártonfi, P Veronese, P Weyerstahl, PAG Santos, PK Mukherjee, PML Lourenço, PV Petrakis, R Alwis De, R Andrews, R Daudt, R Rabanal, R Thimmaraju, RM Rabanal, RS Chauhan, S Apaydin, S Burt, S Crockett, S Gadzovska, S Griffin, S Jaric, S Kültür, S Mahmoud, S Martin, S Uribe, SJ Murch, SL Crockett, SL Crockett, SMA Zobayed, SMA Zobayed, SR Rao, SR Rao, T Nogueira, V Saroglou, W Feng, X-H Cui, X-H Cui, Y Tambe, Z Toker   +158 more
core   +1 more source

Secondary Metabolite Production by the Basidiomycete, , under Different Culture Conditions

Natural Product Communications, 2012
The basidiomycete Lentinus strigellus was cultivated in three different culture media and the secondary metabolites produced under different culture conditions were isolated and identified. When cultivated in a liquid medium with peptone, L.
Bartholomeu A. Barros-Filho, Maria C. F. de Oliveira, Jair Mafezoli, Francisco G. Barbosa, Edson Rodrigues-Filho   +4 more
doaj   +1 more source

One-Pot Pyrrolidine-Catalyzed Synthesis of Benzopyrans, Benzothiopyranes, and Dihydroquinolidines

CHIMIA, 2007
A simple catalytic racemic synthesis of benzopyranes, benzothiopyranes and 1,2-dihydroquinolines is presented. The organocatalytic domino reactions between 2-heteroatom substituted aldehyde derivatives and ?,?-unsaturated aldehydes or ...
Ismail Ibrahem, Henrik Sundén, Ramon Rios, Gui-Ling Zhao, Armando Córdova   +4 more
doaj   +1 more source

Nano-SiO2/DBN: an efficacious and reusable catalyst for one-pot synthesis of tetrahydrobenzo[b]pyran derivatives

BMC Chemistry, 2021
Background The nano-sized particles enhance the exposed surface area of the active part of the catalyst, thereby increasing the contact between precursors and catalyst considerably. In this study, nano-SiO2/1,5-diazabicyclo[4.3.0]non-5-en was synthesized,
Maryam Mehravar, Bi Bi Fatemeh Mirjalili, Elaheh Babaei, Abdolhamid Bamoniri   +3 more
doaj   +1 more source