Towards the identification of characteristic minor components from textiles dyed with weld (Reseda luteola L.) and those dyed with Mexican cochineal (Dactylopius coccus Costa)

Abstract

Towards the identification of characteristic minor components from textiles dyed with weld (Reseda luteola L.) and those dyed with Mexican cochineal (Dactylopius coccus Costa)

Whitening Agents from Reseda luteola L. and Their Chemical Characterization Using Combination of CPC, UPLC-HRMS and NMR

“…Those components including their retention time (rt), their EC, their monoisotopic mass (m/z), the RDBeq and their major HRMS/MS fragments are listed in Table 2. Crossing those MS data (notably the parent ion and fragmentation patterns) with the literature [23,24], a number of flavones and flavonoid glycosides have tentatively been identified. However, the exact nature of some isomers could not be solved.…”

“…This compound could hence correspond to 7-O-methylluteolin or to 3 -O-methylluteolin (also known as chrysoeriol), both have already been identified in R. luteola [24,29].…”

Flavokermesik Asitin Asit Sabitlerinin ve Kalay(II), Alüminyum(III) İyonları İle Oluşturduğu Komplekslerin Kararlılık Sabitlerinin Potansiyometrik Yöntemle Tayini

“…Gıda, şekerleme, alkolsüz içecekler ve ilaçlar için renklendirme ajanı olarak kullanılan azo boyarmaddeleri, ürtiker ve astım bronşit gibi ani aşırı duyarlılık reaksiyonlarından sorumlu tutulmaktadır (8). Sentetik boyarmaddelerin birçoğunun toksik, kanserojen olması ve atıklarının çevre kirliliğine neden olması doğal boyarmaddeleri yeniden gündeme taşımış ve kullanımları; gıda, ilaç, kozmetik ve tekstil boyama endüstrisi alanında ivme kazanmıştır (9,10). Bazı flavonoid grubu boyarmaddelerin çeşitli metallerle yaptıkları kompleksler potansiyometrik ve spektrofotometrik olarak incelenmiştir (11)(12)(13)(14).…”

Kinetic Study of the Equilibration between Carminic Acid and Its Two Isomers Isolated from Cochineal Dye

“…11,14,15) The two isomers of CA were identified as 2-C-α-glucofuranoside and 2-C-β-glucofuranoside of kermesic acid (DCIV and DCVII, respectively). [14][15][16] Stathopoulou et al recently reported that DCIV and DCVII produce two isomeric forms via anomerization and both can be transformed to CA, 15) although the mechanism of inter-conversion has not been clarified. The time course of the transformation between CA, DCIV and DCVII has not yet been clarified.…”

“…In addition, the minor components in food additives, colored textiles and historical artwork generally have been required to identify the species and the geographical origin of the cochineal by using multivariate statistical methods such as principal components analysis, partial-least squares discriminant analysis and hierarchical cluster analysis. 1,[6][7][8][9][10] The quality, insect species, and geographical origin of cochineal dye are typically evaluated using an HPLC equipped with a UV-Vis detector 6,7,11,12) and a photodiode array detector 1,[13][14][15] to determine carminic acid (CA), the main constituent of cochineal, as well as minor components.…”