Total mercury (THg) and monomethylmercury (MMHg) concentrations as well as mercury (Hg) isotope ratios were determined in sediment cores sampled from six locations from the Canadian Arctic Archipelago (CAA). At most sites, THg concentrations showed a decreasing trend with depth, ranging from 5 t...

Isobaric vapor-liquid equilibrium data were measured for three systems, namely, ethyl acetate + dimethyl sulfoxide, propyl acetate + dimethyl sulfoxide and ethyl acetate + propyl acetate + dimethyl sulfoxide at 101.3 kPa in this work. The experimental data were checked by the Van Ness (point-to-...

After World War II, as a move toward Germany demilitarization, up to 385,000 t of munitions were sunk in the Baltic Sea. Munition containing various harmful substances, including chemical warfare agents (CWA) and explosives, that can affect marine biota were dumped on the seafloor. Some of those...

BackgroundLead acetate (Led) and mercury chloride (Mer) represent important ecological and public health concerns due to their hazardous toxicities. Naturally found products play a vital role in chemopreventive agent innovation. The current study aimed to assess the modifying effect of garlic (G...

Mercury acetate (MA) can be obtained by metallic mercury immersed in a mixture of deionised, bidistillated water (dbw) and acetic acid. We show that MA crystallization time is drastically reduced if the previous mixtures are subjected to acoustic cavitation. The largest quantity of crystals is o...

Spatial redistribution of legacy mercury (Hg) contamination in the Hackensack River estuary (New Jersey, USA) was evaluated using mercury stable isotopes. Total Hg varied from 0.06 to 3.8 μg g−1 in sediment from the tidal Hackensack River and from 15 to 154 μg g−1 near historically contaminate...

Time-resolved photoluminescence measurements were used to characterize the photophysical properties of 6-thienyllumazine (TLm) fluorophores in cellulose acetate nanofibers (NFs) in the presence and absence of mercuric acetate salts. In solution, excited-state proton transfer (ESPT) from TLm to w...

Certain acetals can be produced from renewable resources (bioalcohols) and seem to be good candidates for different applications, such as oxygenated diesel additives. This paper addresses the production of acetals (5-hydroxy-2-methyl-1,3 dioxane and 4-hydroxymethyl-2-methyl-1,3 dioxolane) from g...

α-Hydroxyaldehyde dimethyl acetals are prepared efficiently by conversion of α-haloaldehyde dimethyl acetals into α-haloaldehyde hemiacetal acetates and subsequent methanolysis promoted by lithium methoxide.

New series of trans- and cis-3-methylseleno substituted β-lactams (4, 5) have been prepared from 2-methylselenoethanoic acid (2). The four-membered β-lactam ring was introduced by the condensation reaction between ketene retrieved from 2-methylselenoethanoic acid (2) and suitably substituted i...

The ring closure of a series of ω-(benzylseleno)alkyl radicals (1) has been studied. Thiohydroxamic esters derived from ω-(benzylseleno)alkanoic acids decompose smoothly, upon irradiation, with the loss of carbon dioxide to afford 5– and 6– membered selenium-containing rings in 78 – 95% yie...

Protein kinase C theta (PKCθ) plays a critical role in T cell signaling and is an attractive target for the treatment of T cell-mediated diseases such as transplant rejection and autoimmune disease. To identify PKCθ inhibitors, we focused on the 2,6-diamino-3-carbamoyl-5-cyanopyrazine derivati...

An efficient and practical conjugated polymer-based fluorescent sensor for the nanomolar detection of iron(III) in color rice samples has been successfully fabricated using an alcohol-soluble poly(9-fluorenecarboxylic acid) (PFCA), which was facilely electrosynthesized in boron trifluoride dieth...

The absorption and fluorescence spectra of 1-fluorenecarboxylic acid and its anion have indicated that charge transfer interaction between the COOH group and the fluorene ring is more than that of the COO− group with the ring, both in the S0 and S1 states. This has been explained by the grea...

Common sage (Salvia officinalis L., Lamiaceae) is one of the most important medicinal and aromatic plants, with antioxidant, antimicrobial, spasmolytic, astringent, antihidrotic and specific sensorial properties. The essential oil of the plant, composed mainly of the monoterpenes 1,8-cineole, α...

BackgroundHyper-activation of TGF-β signaling is critically involved in progression of hepatocellular carcinoma (HCC). However, the events that contribute to the dysregulation of TGF-β pathway in HCC, especially at the post-translational level, are not well understood.

Twelve 17-(2′-oxazolyl)- and 17-(2′-thiazolyl)-androsta-5,16-diene derivatives were designed and synthesized from 3β-acetoxy-pregna-5,16-dien-20-one (1b) as inhibitors of 17α-hydroxylase-C17,20-lyase (P45017α). Potent inhibitors of this enzyme could be of value as treatment of prostate canc...

Two new Cu(II)–dipeptide complexes of 2-(4′-thiazolyl)benzimidazole, [Cu(Gly-Gly)(TBZ)(Cl)]·4H2O (1) and [Cu(Gly-l-Leu)(TBZ)(Cl)]·H2O (2) (Gly-Gly = glycyl-glycine anion, Gly-l-Leu = glycyl-l-leucine anion and TBZ = 2-(4′-thiazolyl)benzimidazole) have been synthesized and characterized by e...

In the present study a novel series of 1-(1-(4-isobutylphenyl)ethylidene)-2-(4-phenylthiazol-2-yl)hydrazine 2a and its derivatives 2b–2f have been synthesized by the cyclization of 1-(1-(4-isobutylphenyl)ethylidene)thiosemicarbazide with 2-bromoacetophenone/ 4-substituted 2-bromoacetophenones. ...

Staphylococcal penicillinase (EC 3.5.2.6) is shown to undergo partial, fully reversible inactivation of benzylpenicillinase activity on incubation with the substrate quinacillin, the hydrolysis of which follows a corresponding biphasic time-course. The kinetics fit a scheme involving slow isomer...