Search results for "Isatis"

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…

A new species of Isatis (Brassicaceae) from the Pollino National Park (Basilicata, S Italy)

2015

A new species, Isatis raimondoi (Brassicaceae) is described from Mt Alpi in the Pollino National Park (Basilicata, Southern Italy). Its relationships with the other species of Isatis occurring in Italy are examined.

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 …

Taxonomic remarks on Isatis tinctoria (Brassicaceae) from Pollino National Park (Basilicata, Italy)

2015

Isatis L. (Brassicaceae) is an Eurasian genus including 79 species (1). It is one of the most difficult cruciferous genera (2). Some species, in fact, are highly polymorphic in fruit morphology, the structures that provide the most diagnostic characters (3). In addition, due to the extreme variability in all morphological characters, the limits of many species are uncertain (4). Most if not all diagnostic characters used in earlier classifications are very variable and because of the unreliability of vegetative and floral characters it is difficult or impossible to identify many specimens when mature fruits are missing (5). The patterns of variation suggest that hybridisation may be widespr…

Anti-inflammatory and antiallergic activity in vivo of lipophilic Isatis tinctoria extracts and tryptanthrin.

2006

The effects of a supercritical CO2 (SFE) extract, a dichloromethane (DCM) extract from Isatis tinctoria leaf and the alkaloidal constituent tryptanthrin were studied in acute and subchronic experimental models of inflammation. The SFE and DCM extracts showed anti-inflammatory activity in the carrageenan-induced acute mouse paw oedema (ED50 values of 78 mg/kg and 165 mg/kg P. O., respectively) and in the acute tetradecanoylphorbol acetate (TPA)-induced mouse ear oedema in oral (62% and 32% oedema reduction at 100 and 125 mg/kg, respectively) and topical application (37% and 33% reduction of oedema at 0.5 mg/ear). In contrast, tryptanthrin showed no significant anti-inflammatory effect. The D…

Un petit essaye sur les matières premières pour faire la teinture à cuve

2015

Les cultures du l’Orient teintaient in bleu depuis le Néolithique. L'art de la teinture à l’Indigo a prospéré dans la vallée de l'Indus, en Mésopotamie et l'Égypte antique, et la Grèce. Cet artisanat renaît dans la ville d'Alexandrie à l'époque hellénistique. Dans le cas du colorant à la cuve, l'art de préserver une cuve ou sa remontée, pour ne pas perdre la teinture, déboise être un travail spécialisé dans l’Antiquité. La connaissance de ces procédures, en même temps que la présence des restes des bâtiments des ateliers pour la teinture fouillées dans les différents territoires de l’Empire Romain, à l’Orient (Tell Beit Mirsin) et à l’Occident (Pompéi, Rome, Hostie, Barcino), montre la cour…