Search results for "Isatis tinctoria"

Anti-arthritic activity of a lipophilic woad (Isatis tinctoria) extract

2006

A dichloromethane extract of Isatis tinctoria was tested in the adjuvant-induced arthritis model in rats. The extract (150 mg/kg p. o.) leads to a significant reduction of paw oedema. Radiographic, histological and clinical assessment confirmed reduced damage of cartilage and signs of inflammatory response in comparison to untreated control. No significant differences were observed in the tissular levels of cyclooxygenases 1 and -2, and of inducible nitric oxide synthase in Isatis treated and untreated animals. High dose treatment with Isatis extract for two weeks did not result in macroscopic lesions of the gastric mucosa.

Multi-analytical study of the medieval wall paintings from the rupestrian church Grotta del Crocifisso at Lentini (eastern Sicily): new evidence of t…

2022

AbstractThis study presents the results of the examination and characterisation of the wall paintings that decorate the rupestrian church named Grotta del Crocifisso, which is located in the territory of Lentini (eastern Sicily, few tens of kilometres from Catania and Syracuse). The earliest mural paintings in the church date back to the twelfth century AD. A multi-analytical approach was adopted for the characterisation of stone materials, secondary degradation products, and pigments. For this purpose, the following techniques were used: reflected light microscopy (RLM), polarised light microscopy on thin sections (PLM), X-ray powder diffraction (XRPD), mercury intrusion porosimetry (MIP),…

Sowing date, transplanting, plant density and nitrogen fertilization affect indigo production from Isatis species in a Mediterranean region of Spain

2006

Abstract The increasing interest in natural products from a renewable source has encouraged growers to reintroduce indigo-producing crops into the European agriculture. We studied agronomic conditions (sowing date, plant density, nitrogen fertilization, irrigation rate, seedling transplanting) influencing production of the blue pigment indigo, from Isatis tinctoria and I. indigotica crops in a Mediterranean region of Spain (Valencia). I. tinctoria was more suitable for cultivation in our climate conditions than I. indigotica . Indigo yield from Spanish I. tinctoria trials was greater than in Northern and Central Europe. Furthermore, indigo production was maintained when water and nitrogen s…

Natural Indigo from Isatis tinctoria L. for the Reassessment of Sicilian Crops - A Minireview

2013

VALORIZZAZIONE PRODUTTIVA DEL GERMOPLASMA DELLE AREE INTERNE: PROVE DI COLTIVAZIONE DI ISATIS TINCTORIA L.

2009

Le linee più recenti della politica agricola comunitaria attribuiscono grande importanza all’espansione, o reintroduzione, di colture che, assenti dai sistemi colturali ordinari, siano in grado di fornire le più diverse tipologie di materie prime di interesse industriale. Tra queste, un ruolo considerevole spetta a tutte le specie utilizzabili per l'estrazione di principi coloranti. Isatis tinctoria L., conosciuta anche come Guado, viene adoperata in Europa fin da tempi remotissimi per l’estrazione dell’indaco, sostanza colorante blu contenuta in buona quantità nelle foglie. Nel corso del tempo, per effetto di svariate circostanze di ordine commerciale e politico, l’interesse verso questa C…

2004

Analysis of extracts from two woad species (Isatis tinctoria and Isatis indigotica) and Polygonum tinctorium revealed that only one indigo precursor (indican) was present in Polygonum, but two precursors were found in Isatis spp. This was done using high performance liquid chromatography (HPLC), coupled to an evaporative light scattering detector (ELSD). In Isatis spp., the indigo precursors indican and a fraction representing isatan B were identified. The proportion of indican and isatan B was different between the two Isatis spp. tested. For the first time, it was possible to quantify the precursors in woad plant species, and the results were found to be in good agreement with those made …