For the first time, wall paintings of 20th century Russian artists in Bulgaria were analysed by means complementary analytical methods. Representative samples collected from church St. Nicholas Sofia, decorated famous Vasily Perminov, Michail Maletski and Nikolay Shelehov during different periods examined micro-Raman spectroscopy, attenuated total reflectance-Fourier transform infrared (ATR-FTI...

Organic colorants of textiles found in the female burial Lieto Ristinpelto, SW Finland, were analyzed by HPLC-PDA. The textiles’ visible colors varied from different brownish shades to blueish, greenish, and reddish hues. aim chromatographic analysis was deepen current understandings dyes used Finland at transition between 12th 13th centuries AD, i.e., beginning local Medieval period, contribut...

In this work, microwave irradiation was used to extract two dye plants (Quercus ithaburansis Decaisne and Rubia tinctorum L.) natural cotton. Using (MW) energy, the extraction time for these dyeing organic cotton fabric were optimized. The colouring compounds analysed in extractions dyed fabrics by reversed-phase high-performance liquid chromatographic method coupled with a photodiode array det...

Rubia cordifolia Linn (Rubiaceae) is a climbing perennial herbal plant, which is widely distributed in China and India. Its root and rhizome, Rubiae Radix et Rhizoma (called Qiancao in China and Indian madder in India), is a well known phytomedicine used for hematemesis, epistaxis, flooding, spotting, traumatic bleeding, amenorrhea caused by obstruction, joint impediment pain, swelling and pain...