In the present study, five naphthalene-based azo dyes were obtained using classical azo coupling reactions. The structure of the dyes was characterized and confirmed by the UV-vis, FT-IR, 1H NMR and 13C NMR analyses. The solvatochromic behavior of the dyes was studied in a set of 10 solvents with different polarity and considerable results were obtained. The dyes were applied as disperse dyes t...

BACKGROUND Histoplasmosis (HP) is diagnosed by visualizing intracellular microorganisms in biopsy and/or culture. Periodic-acid Schiff (PAS) and Gomori methenamine silver (GMS) staining methods are routinely used for identification. The acid-fast property of Histoplasma was identified decades ago, but acid-fast staining has not been practiced in current surgical pathology. Awareness of the acid...

Globally, there is growing demand in natural colourants from plants the food, cosmeceutical and pharmaceutical fields. Generally, among various categories of secondary metabolites, carotenoids, anthocyanins, phenols are significant plant-based pigments. Coloured pigments possess remarkable anthocyanin related to anti-oxidant, anti-inflammatory anti-metastatic features. The major objective this ...

Double-encapsulated microcapsules (DEMs) were prepared and effectively adsorbed onto the cotton fabric surfaces during impregnation without crosslinking agents to obtain functional fabrics. Specifically, Fourier transform infrared spectrometer (FTIR) confocal laser scanning microscope (CLSM) showed two different molecules (lavender essence dye indigo) encapsulated into simultaneously, with load...

A B S T R C TEfforts to substitute synthetic dyes on fabrics for natural are currently increasing. Research and innovation extremely needed support those attempts so that the quality of is more competitive than dyes. This study aims optimize dyeing parameters cotton using dye extracts derived from barks Tegeran (Cudrania javanensis), Merbau (Intsia bijuga), Tingi (Ceriops tagal), Jambal (Peltop...

Mangrove termasuk tumbuhan yang dipengaruhi oleh pasang surut air laut, memiliki adaptasi terhadap kadar garam cukup tinggi, dan selalu tergenang air. Manfaat mangrove salah satunya digunakan sebagai pewarna alami pada kain. Penerapan dapat mengurangi adanya dampak pencemaran disebabkan sintesis. Penelitian ini bertujuan untuk mengetahui daya tahan luntur kain pencucian sabun, kelunturan, perbe...

Colored waterborne polyurethanes have been widely used in paintings, leathers, textiles, and coatings. Here, a series of black waterborne polyurethanes (WPUs) with different ratios of black dye, Sudan Black B (SDB), were prepared by step-growth polymerization. WPU emulsions as obtained exhibit low particle sizes and remarkable storage stability at the same time. At different dye loadings, essen...