Results 41 to 50 of about 1,918 (162)

Formaldehyde as a Chemical Defence Agent of Fruiting Bodies of Mycena rosea and its Role in the Generation of the Alkaloid Mycenarubin C

ChemBioChem, Volume 21, Issue 11, Page 1613-1620, June 2, 2020., 2020
Natural protection: Mycenaubin C, a pyrroloquinoline alkaloid with an unprecedented core structure, was isolated from fruiting bodies of M. rosea. The alkaloid is generated from mycenarubin A and formaldehyde. The amounts of formaldehyde present in the fruiting bodies of M. rosea exhibit a fungistatic effect against the mycoparasite S. fusiger. In turn,
Rieke Himstedt, Silke Wagner, Robert J. R. Jaeger, Michèle‐Laure Lieunang Watat, Jana Backenköhler, Zeljka Rupcic, Marc Stadler, Peter Spiteller   +7 more
wiley   +1 more source

A click chemistry route to 2-functionalised PEGylated and cationic beta-cyclodextrins: co-formulation opportunities for siRNA delivery [PDF]

, 2012
A new approach to the synthesis of amphiphilic beta-cyclodextrins has used 'click' chemistry to selectively modify the secondary 2-hydroxyl group. The resulting extended polar groups can be either polycationic or neutral PEGylated groups and these two ...
Cryan, John F., Darcy, Raphael, Desgranges, Stephane, O'Driscoll, Caitríona M., O'Mahony, Aoife M., Ogier, Julien R.   +5 more
core   +1 more source

Total Synthesis of Tri‐, Hexa‐ and Heptasaccharidic Substructures of the O‐Polysaccharide of Providencia rustigianii O34

Chemistry – A European Journal, Volume 26, Issue 28, Page 6264-6270, May 15, 2020., 2020
Embedded fucoses: First syntheses of substructures of the O‐polysaccharide of Providencia rustiginii O34 are presented. The repeating unit is a heptasaccharide with seven different monosacchride units (see figure). Abstract A general and efficient strategy for synthesis of tri‐, hexa‐ and heptasaccharidic substructures of the lipopolysaccharide of ...
Somayeh Ahadi, Shahid I. Awan, Daniel B. Werz   +2 more
wiley   +1 more source

A piperic acid CoA ligase produces a putative precursor of piperine, the pungent principle from black pepper fruits

The Plant Journal, Volume 102, Issue 3, Page 569-581, May 2020., 2020
Summary Black pepper (Piper nigrum L.) is known for its high content of piperine, a cinnamoyl amide derivative regarded as largely responsible for the pungent taste of this widely used spice. Despite its long history and worldwide use, the biosynthesis of piperine and related amides has been enigmatic up to now.
Arianne Schnabel, Fernando Cotinguiba, Benedikt Athmer, Changqing Yang, Bernhard Westermann, Angela Schaks, Andrea Porzel, Wolfgang Brandt, Frank Schumacher, Thomas Vogt   +9 more
wiley   +1 more source

Neutralization of pharmacological and toxic activities of Bothrops jararacussu snake venom and isolated myotoxins by Serjania erecta methanolic extract and its fractions

Journal of Venomous Animals and Toxins including Tropical Diseases, 2011
Most of the snakebites recorded in Brazil are caused by the Bothrops genus. Given that the local tissue damage caused by this genus cannot be treated by antivenom therapy, numerous studies are focusing on supplementary alternatives, such as the use of ...
RS Fernandes, TR Costa, S Marcussi, CP Bernardes, DL Menaldo, II Rodriguéz Gonzaléz, PS Pereira, AM Soares   +7 more
doaj   +1 more source

In vitro vasorelaxation mechanisms of bioactive compounds extracted from Hibiscus sabdariffa on rat thoracic aorta [PDF]

, 2009
Background: In this study, we suggested characterizing the vasodilator effects and the phytochemical characteristics of a plant with food usage also used in traditional treatment of arterial high blood pressure in Senegal.
Mamadou Sarr, Saliou Ngom, Modou O Kane, Alassane Wele, Doudou Diop, Bocar Sarr, Lamine Gueye, Ramaroson Andriantsitohaina, Aminata S Diallo   +8 more
core   +4 more sources

Tannins of Tamarind Seed Husk: Preparation, Structural Characterization, and Antioxidant Activities

Natural Product Communications, 2011
The high content (about 39%) of polymeric tannins in tamarind ( Tamarindus indica L.) seed husk (TSH) was demonstrated, and an extract (crude TSE) with a high content (about 94%) of polymeric tannins was prepared from TSH with a one pot extraction using ...
Puksiri Sinchaiyakit, Yohji Ezure, Sarin Sriprang, Supakorn Pongbangpho, Nasapon Povichit, Maitree Suttajit   +5 more
doaj   +1 more source

Preparative Isolation of Two Prenylated Biflavonoids from the Roots and Rhizomes of Sinopodophyllum emodi by Sephadex LH-20 Column and High-Speed Counter-Current Chromatography

Molecules, 2015
Two prenylated biflavonoids, podoverines B–C, were isolated from the dried roots and rhizomes of Sinopodophyllum emodi using a Sephadex LH-20 column (SLHC) and high-speed counter-current chromatography (HSCCC).
Yan-Jun Sun, Li-Xin Pei, Kai-Bo Wang, Yin-Shi Sun, Jun-Min Wang, Yan-Li Zhang, Mei-Ling Gao, Bao-Yu Ji   +7 more
doaj   +1 more source

Antibacterial modified diketopiperazines from two ascidians of the genus Didemnum [PDF]

, 2009
The chemical investigation of the crude extract of an ascidian of the genus Didemnumled to the isolation of the modified diketopiperazine rodriguesines A (1) and (2) as a mixture of homologues, which could be identified by analysis of spectroscopic data ...
BERLINCK, Roberto G. S., FERREIRA, Antonio G., GONÇALVES, Reginaldo, KOSSUGA, Miriam H., LIMA, Bruna A., LIRA, Simone P., MCHUGH, Shayna, ROCHA, Rosana M., TORRES, Yohandra R., VELOSO, Katyuscya   +9 more
core   +1 more source

Convenient synthesis and purification of [Bu4N] 2[Ru(4-carboxy-4-carboxylate-2,2′-bipyridine) 2(NCS)2]: A landmark DSC Dye [PDF]

, 2008
We present here a convenient synthesis of the landmark dye-sensitized solar cell dye [Bu4N]2[Ru(4-carboxy-4-carboxylate-2,2?- bipyridine)2(NCS)2] (N719).
Buchholz, F, McDonagh, AM, Rawling, T
core   +1 more source