The elicitor-induced incorporation of phenylpropanoid derivatives into the cell wall and the secretion of soluble coumarin derivatives (phytoalexins) by parsley (Petroselinum crispum L.) suspension cultures can be potentiated by pretreatment of the cultures with 2,6-dichloroisonicotinic acid or derivatives of salicylic acid. To investigate this phenomenon further, the cell walls and an extracel...

One of the ways to improve activity sulfide catalysts is increase quantity molybdenum up contents greater than 15 wt%. For such high Mo contents, distribution MoS2 particles suspected play an important role in catalytic activity. A complete description active phase thus required and implies measuring i) size stacking isolated slabs, ii) proportion involved aggregates or individual iii) aggregat...

The use of 4-amino-5-benzyl-4H-[1,2,4]triazole-3-thiol (1) as a precursor to synthesize some new biologically active heterocycles has been found to be effective. Condensation of 1 with appropriate aldehydes gave the new Schiff bases 2a, b, which either by cyclization with thioglycolic acid gave 3a, b, or by Mannich reaction using morpholine gave 4a, b. Reaction of 1 with different halogen compo...

It was the aim of this study to determine the potential of two aliphatic and two aromatic thiolated chitosan conjugates: chitosan-thioglycolic acid (chitosan-TGA), chitosan-4-thiobutylamidine (chitosan-TBA), chitosan-6mercaptonicotinic acid (chitosan-6MNA) and chitosan-4-mercaptobenzoic acid (chitosan-4MBA), respectively, as permeation enhancing agents. Ritonavir was employed as model compound....

We report on the thiol-ene chemistry guided preparation of novel thiolated polymeric nanocomposite films of abundant anionic carboxylic groups for electrostatic enrichment and sensitive electroanalysis of cationic dopamine (DA) in neutral solution. Briefly, the thiol-ene nucleophilic reaction of a carboxylated thiol with oxidized polypyrrole (PPy), which was electrosynthesized on an Au electrod...

Suspension cultures of Picea abies (L.) Karst released polymeric material into the culture medium when treated with an elicitor preparation from the spruce needle pathogen Rhizosphaera kalkhoffii. The presence of lignin (about 35%, w/w) was demonstrated by phloroglucinol/HCI reactivity and quantitation with thioglycolic acid. Carbohydrate (about 14%, w/w) and protein (about 32%, w/w) were also ...