Background. Nitric oxide (∙NO), a ubiquitous molecule involved in a plethora of signaling pathways, is produced from dietary nitrate in the gut through the so-called nitrate–nitrite–NO pathway. In the stomach, nitrite derived from dietary nitrate triggers a network of chemical reactions target...

After taking alcoholic beverages, the ethanol is mixed with saliva and then gastric juice. As pH of gastric juice is around 2, the ethanol might be transformed to ethyl nitrite in the stomach by reacting with salivary nitrite. In this study, reactions between ethanol and nitrite in acidified sal...

Nonclassical P450s of CYP74 family control the secondary conversions of fatty acid hydroperoxides to bioactive oxylipins in plants. At least ten genes attributed to four novel CYP74 subfamilies have been revealed by the recent sequencing of the spikemoss Selaginella moellendorffii Hieron genome....

“Heterolytic” hydroperoxide lyase (HPL) and divinyl ether synthase (DES) are important enzymes of the plant lipoxygenase pathway. HPL cleaves fatty acid hydroperoxides into the aldehyde fragments. DES converts hydroperoxides into the divinyl ethers. The present paper is concerned with recent s...

Incubations of linoleic acid with cell-free preparations from Lily-of-the-Valley (Convallaria majalis L., Ruscaceae) roots revealed the presence of 13-lipoxygenase and divinyl ether synthase (DES) activities. Exogenous linoleic acid was metabolized predominantly into (9Z,11E,1′E)-12-(1′-hexeny...

Green tissues of spikemoss Selaginella martensii Spring possessed the complex oxylipins patterns. Major oxylipins were the products of linoleic and α-linolenic acids metabolism via the sequential action of 13-lipoxygenase and divinyl ether synthase (DES) or allene oxide synthase (AOS). AOS prod...

Applicability of a series of coumarin derivatives as fluorescent probes for monitoring progress of cationic photopolymerization processes by Fluorescence Probe Technique (FPT) has been studied using triethylene glycol divinyl ether as a model monomer and diphenyliodonium hexafluorophospate as a ...

The hydroxylation reactions of ethyl vinyl ether (EVE) in the present of O2 and NO are analyzed by using MPWB1K/6-311++G(3df,2p)//MPWB1K/6-31+G(d,p) level of theory. According to the calculated thermodynamic data, the detailed reaction mechanisms of EVE and OH are proposed. All of the ten possib...

A facile method for surface hydrophobization of magnetite (Fe3O4) nanoparticles with polyhexylsilsesquioxane was proposed. The surface-hydrophobizing coating formed of polyhexylsilsesquioxane on the surface of the magnetite nanoparticles was spontaneously generated from hexylated silanol moiety ...

The vapor liquid equilibrium data of diethylamine + acetone, acetone + N-methyl pyrrolidone and diethylamine + N-methyl pyrrolidone were measured at 101.3 kPa in this article. Van Ness and Herington test were used to check the experimental data. Three models of the NRTL, UNIQUAC and Wilson were ...

Series of systematically varied 2-(1H-imidazol-2-yl)phenol ligand frameworks, which were synthesized and properly characterized, have been used to investigate favourable ligand characteristics towards in situ formation of active palladium species in Suzuki–Miyaura coupling. Structures of 2-(4,5...

Glycosyl fluorides can be synthesized from thio-, seleno-, and telluroglycosides and glycosyl sulfoxides using the aminodifluorosulfinium tetrafluoroborate reagents Xtalfluor-E and -M, with or without added N-bromosuccinimide. Mechanistic studies provide evidence that fluoride is delivered from ...

1,2-Migration and concurrent glycosidation of ethyl(phenyl) 2,3-orthoester-1-thio-α-d- and l-mannopyranosides under the action of TMSOTf readily afforded the corresponding 2-S-ethyl(phenyl)-2-thio-β-glucopyranosides, ready precursors to 2-deoxy-arabino-hexopyranosides (2-deoxy-β-glucopyranosi...

A number of novel, aryl and aralkyl d-mannopyranosides and 1-thio-d-mannopyranosides were synthesized for evaluation of insulin-like and insulin-antagonistic properties. The substituted-phenyl α-d-mannopyranosides were prepared by the general procedure of Helferich and Schmitz-Hillebrecht, the ...

The thiomannoside is a key intermediate in the synthesis of polymannosaccharide. But its crystallographic study has not been reported. X-ray crystal structure analysis shows that the crystal of phenyl 2,3,4,6-tetra-O-acetyl-1-thio-α-d-mannopyranoside is in orthorhombic system, has P212121 space...

Commercially available d-glucofuranurono-6,3-lactone was transformed into the known, crystalline methyl (5R)-1,2,3,4-tetra-O-acetyl-5-C-bromo-β-d-glucopyranuronate (3) in three steps. Reduction with tributyltin hydride gave crystalline methyl 1,2,3,4-tetra-O-acetyl-α-l-idopyranuronate (4) in ∼...

Penclomedine (PEN) is a synthetic pyridine derivative that has been selected for clinical development based on its activity against human and mouse breast tumors implanted in mice. Its mechanism of action was unclear, and we were interested in determining its mechanism of cytotoxicity in vitro a...

Telomeres, or chromosome ends, are essential in maintaining chromosomal integrity. Telomeres consist of a short hexameric sequence, 3′-TTAGGG-5′, repeated in tandem arrays added to chromosomes by the ribonucleoprotein enzyme telomerase. In this study, we assessed whether penclomedine, a novel ...

MYB transcription factors (TFs) have vital roles in regulating lignin or fiber development. Flax (Linum usitatissimum) is known as one of the plants with high fiber production capacity. However, no studies have been conducted to identify and characterize MYB TFs in the flax genome. Results showe...

Bilayered long- and short-chain phospholipid assemblies, known as bicelles, have been widely used as model membranes in biological studies. However, to date, there has been no demonstration of structural or functional viability for the fundamental mitochondrial electron transport complexes recon...