Results 61 to 70 of about 3,124,995 (289)

Simplexidine, a 4-Alkylpyridinium Alkaloid from the Caribbean Sponge Plakortis simplex

Molecules, 2008
Chemical analysis of the secondary metabolites of the Caribbean sponge Plakortis simplex, a source of many bioactive compounds, showed the presence of the new metabolite simplexidine (4), belonging to the extremely rare class of 4-alkyl-pyridinium ...
Orazio Taglialatela-Scafati, Fernando Scala, Adriana Romano, Ernesto Fattorusso   +3 more
doaj   +1 more source

Natural Variations of ZmRLR1 Mediate the Root Lodging Resistance of Maize by Regulating Root Ascorbate and Auxin Homeostasis

Advanced Science, EarlyView.
Root lodging severely limits crop yield and quality. We reveal that ZmRLR1, a plasma membrane b‐type cytochrome, regulates lodging resistance in maize through dual roles: modulating intracellular redox balance and functioning as a novel component of clathrin‐mediated endocytosis to influence auxin homeostasis. Moreover, natural variations in the ZmRLR1
Wenshuai Lv, Pengshuai Yan, Huan Chen, Guangxian Li, Yiyue Zhao, Yanhui Chen, Wen‐Xue Li, Qingguo Du   +7 more
wiley   +1 more source

Sydnone C-4 heteroarylation with an indolizine ring via Chichibabin indolizine synthesis

Beilstein Journal of Organic Chemistry, 2016
The synthesis of sydnones heteroarylated at C-4 with an indolizine was achieved by Chichibabin (Tschitschibabin) indolizine synthesis starting from the corresponding sydnone-N-pyridinium bromides.
Florin Albota, Mino R. Caira, Constantin Draghici, Florea Dumitrascu, Denisa E. Dumitrescu   +4 more
doaj   +1 more source

Diquat Derivatives: Highly Active, Two-Dimensional Nonlinear Optical Chromophores with Potential Redox Switchability [PDF]

, 2010
In this article, we present a detailed study of structure−activity relationships in diquaternized 2,2′-bipyridyl (diquat) derivatives. Sixteen new chromophores have been synthesized, with variations in the amino electron donor substituents, π-conjugated ...
Abbotto A., Akdas-Kilig H., Alain V., Averseng F., Benjamin J. Coe, Bosshard Ch., Boubekeur-Lecaque L., Bruce S. Brunschwig, Brunschwig B. S., Bublitz G. U., Campo J., Cariati E., Champagne B., Cho B. R., Cifuentes M. P., Clays K., Clays K., Clays K., Clays K., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Cui Y.-Z., Dhenaut C., Di Bella S., Di Bella S., Di Bella S., Ferguson, B., Figi H., Franz E., Geis W., Gillaizeau-Gauthier I., Heesink G. J. T., Hendrickx E., Hennrich G., Hilton A., Inge Asselberghs, Isborn C. M., James A. Harris, Jang S.-R., Javier Garín, Jeong M.-Y., Jesús Orduna, John Fielden, Kaino T., Kawase K., Kawase K., Kim H. M., Kim H. S., Kim H. S., Knoch F., Koen Clays, Kuzuya M., Kuzyk M. G., Kuzyk M. G., Kwon O., Lacroix P. G., Le Bouder T., Le Floc’h V., Lee O.-K., Li H.-P., Li H.-P., Lindner E., Liu C.-G., Liu Y., Madeleine Helliwell, Malaun M., Marder S. R., Marder S. R., Marder S. R., Marder S. R., Maury O., Maury O., McDonagh A. M., McEntee J., Meshulam G., Miles R. E., Mohan Kumar R., Mori Y., Moylan C. R., Muhammad S., Nalwa H. S., Nunzi F., Olbrechts G., Olbrechts G., Ostroverkhov V., Oudar J. L., Oudar J. L., Papadopoulos M. G., Powell C. E., Rigamonti L., Ruiz B., Ruiz B., Schneider A., Schneider A., Simon P. Foxon, Sohma S., Sporer C., Tai O. Y.-H., Taniuchi T., Taniuchi T., Vance F. W., Vance F. W., Verbiest T., Weyland T., Willetts A., Wolff J. J., Wolff J. J., Woodford J. N., Wortmann R., Wortmann R., Xu X.-L., Yang M.-L., Yang Z., Yang Z., Yang Z., Yitzchaik S., Zhou Y.-F., Zrig S., Zyss J., Zyss J.   +131 more
core   +2 more sources

Enhanced Thermodynamic Stability of UO22+ Complex Through Structure Preorganization of N3O2‐Pentadentate Planar Ligand for Uranium Harvesting from Seawater

Advanced Science, EarlyView.
Thanks to the appropriate structure preorganization of an N3O2‐pentadentate planar ligand, 2,6‐bis(2‐hydroxyphenylmethylaminomethyl)pyridine (H2saldamp) exhibits the strongest coordination affinity to UO22+ (log βU = 33.60) compared to ligands developed for uranium harvesting from seawater to date, as well as good separability of UO22+ from other metal
Ryuto Nabata, Satoru Tsushima, Koichiro Takao   +2 more
wiley   +1 more source

ELECTROCHEMICAL BEHAVIOUR OF THE NEW HETEROCYCLIC PYRIDINIUM LIGANDS

Studia Universitatis Babes-Bolyai Chemia, 2015
New heterocyclic pyridinium compounds as N,N’ di-(p-bromophenacyl)-4,4’-bipyridinium dibromide (Lr) and N,N’ di-(p-bromophenacyl)-1,2-bis(4-pyridinium)-ethane dibromide (Lm) were investigated applying cyclic voltammetry to evaluate the electrochemical ...
Andreea CÂRÂC, Rica BOSCENCU, Rodica Mihaela DINICĂ, Geta CÂRÂC   +3 more
doaj  

The synthesis and characterization of polypeptide-adriamycin conjugates and its complexes with adriamycin. Part I [PDF]

, 1985
Poly(α-l-glutamic acid) (PGA) was grafted with amino acid and oligopeptide spacers up to 5 amino acids with the use of N,N'-carbonyldiimidazole and 2,3-dihydro-1,2-benz-isothiazole-3-on-1, 1-dioxide (saccharin) as an additive, and these polypeptides were
Eenink, M.J.D., Feijen, J., Heeswijk, W.A.R., Hoes, C.J.T., Potman, W., Stoffer, T.   +5 more
core   +2 more sources

Toward Complete CO2 Electroconversion: Status, Challenges, and Perspectives

Advanced Energy Materials, EarlyView.
Electrocatalytic CO2 reduction and CO2 batteries face challenges in achieving complete CO2 conversion with high conversion rates and Faradaic efficiency simultaneously. Existing systems compromise one for the other with incomplete CO2 conversion and inefficiencies, hindering practical applications. This perspective highlights state‐of‐the‐art progress,
Changfan Xu, Ping Hong, Yulian Dong, Marc Robert, Guosheng Shao, Yong Lei   +5 more
wiley   +1 more source

Antibacterial Activity Ods Fractions of Marine Sponge Auletta SP. Against Mycobacterium Smegmatis [PDF]

, 2019
The marine sponge collected from tropical coral reefs in Manado North Sulawesi Indonesia was screened for antimicrobial activities. In the screening program to search for antituberculotic inhibitors, the result found that the ethanol extract ODS ...
Sumilat, D. A. (Deiske)
core   +2 more sources

Structure and Spectroscopic Characterisation of Phenanthroline‐Based Iodobismuthate(III) Complexes Utilised for Raw Acoustic Signal Classification

Advanced Intelligent Discovery, EarlyView.
Memristors based on trimethylsulfonium (phenanthroline)tetraiodobismuthate have been utilised as a nonlinear node in a delayed feedback reservoir. This system allowed an efficient classification of acoustic signals, namely differentiation of vocalisation of the brushtail possum (Trichosurus vulpecula).
Ewelina Cechosz, Gisya Abdi, Andrzej Sławek, Marlena Gryl, Konrad Szaciłowski   +4 more
wiley   +1 more source