The catalytic activities of human red cell carbonic anhydrase (EC 4.2.1.1) isozymes B and C for the hydrolysis of 2-hydroxy-5-nitro-α-toluenesulfonic acid sultone have been compared with their activities towards three other substrates. The substrate specificity (measured as Kcat/Km) for either ...

Currently, the increasing importance of the bio-based chemical compounds development is visible in the polymer chemistry, chemical engineering and materials science. It is well-known that the various purity level and different contaminants characterize petrochemical-based compounds compared to t...

A family of five strictly related glycoconjugated azo dyes (GADs), characterized by the presence of the same chromophore and a variable number (1–4) of deprotected hexose units, has been prepared by employing succinate bridges for connecting the azo dye and the sugar portions. The modulation of...

A series of environmentally-friendly bio-based poly(1,3-propylene succinate) diols (bio-PPS) with different average molecular weights (Mn) were synthesized from bio-based 1,3-propanediol (bio-PDO) and bio-based succinic acid (bio-SA). With the employment of bio-PPS as a hydrophobic block and pol...

Tetrafluorothiophene-S,S-dioxide reacts with terminal acetylenes by two pathways to give (2 + 2) cycloaddition and (4 + 2) Diels-Alder addition products, the latter being accompanied by extrusion of SO2 and aromatization. The (4 + 2) process is orbital topology-allowed to proceed in concerted fa...

Peroxisome proliferator activated-receptor gamma (PPARγ) binds to peroxisome receptor response elements with its heterodimeric partner, retinoid X receptor, and regulates downstream gene expression. PPARγ transcriptionally modulates fat metabolism, and receptor agonists have been developed to ...

4-N-Pyrrolidinylazobenzene (4N) has been described sequentially as a potential rat hepatocarcinogen, a non-hepatocarcinogen to the rat, a possible pure initiating agent to the rat liver and as unlikely to be either a rat hepatocarcinogen or a cancer initiating agent. Given the importance of defi...

Based on our previous screening hit compound 1, a series of novel indole-pyrimidine hybrids possessing morpholine or thiomorpholine moiety were synthesized via an efficient one-pot multistep synthetic method. The antiproliferative activities of the synthesized compounds were evaluated in vitro a...

The current research presents the exploration of coloring potential of neem bark under the influence of ultrasonic treatment. It is found that good color strength is obtained when tannin from bark is extracted in acidified methanol medium and is used to dye irradiated cotton fabric. New shades a...

Two sets of ancient roman Egyptian blue (EB) samples and one set of EB samples synthesised in our lab, were analysed by EPR spectroscopy, a technique not commonly used in this field. The spectroscopic parameters obtained were used to attempt the discrimination of the provenance and of the manufa...

The microstructure and chemical composition of blue cakes, found during the archaeological excavation of the Ayanis fortress (Eastern Anatolia, Turkey), have been investigated by means of scanning electron microscopy combined with energy dispersive spectrometry (SEM–EDS), X-ray diffraction (XRD...

While the use of Egyptian blue (EB) as the earliest artificial pigment was common amongst ancient Mediterranean cultures throughout Egypt, Mesopotamia, Greece, and the Roman Empire, little is known about ancient production centres and the sources of raw materials. Variations in lead isotope (LI)...

Two of the oldest synthetically produced and most widespread pigments employed in the decoration of ancient polychrome artifacts are Egyptian blue, a vitreous blue compound, and madder lake, a hybrid organic-inorganic composite. Both of these pigments are known to be photoluminescent after elect...

In this study, Fe2O3 (hematite) nanoparticles with different crystallite sizes (40–59 nm) were synthesized from Egyptian insecticide cans using the combustion method. The organic fuels were urea, glycine, L-alanine, and L-valine. Fe2O3 nanoparticles were characterized utilizing different device...

The considerable amount of research carried out up to present time in an attempt to understand the production technique of Egyptian blue frit is based on analyses of the ancient pigment and its laboratory synthesis. The fortunate finding in Roman Liternum of 1st century AD fragments of ceramic c...

In this paper we demonstrate that micronised Egyptian blue pigment can be used as a safe and simple material to visualise latent fingerprints on non-porous surfaces as near-infrared luminescent impressions. This allows the detection of latent fingerprints on highly patterned and reflective surfa...

The mural paintings in Santa Maria foris portas church at Castelseprio (Lombardy) are a precious early medieval cycle datable between 9th or 10th century CE and are therefore among the oldest Carolingian in Italy. The painting cycle has been analysed in situ, to characterise the palette used in ...

The effect of the presence of NaCl on the synthesis of Egyptian blue pigment (cuprorivaite, CaCuSi4O10) was studied through experiments in which different amounts of NaCl were introduced in the initial mixture of reactants. The solids synthesized were characterized by X-ray Diffraction, Field Em...

Alumina-silica aerogels (ASAs) were firstly prepared by using alumina aerogels as template via ice-template method and then silica sols infiltrated via vacuum impregnation. Fourier transform infrared (FT-IR) spectra, X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to inv...

In order to investigate the effect of surface wettability on colloidal stability, aggregation/dispersion behaviors of fine silica and graphite in aqueous suspensions have been investigated. It was found that hydrophobic graphite particles showed a high aggregation degree in low pH suspensions, w...