High resolution 1H nuclear magnetic resonance (NMR) spectroscopy was employed to conduct a multicomponent investigation of the oxidation of salivary biomolecules by peroxoborate present in a tooth-whitening dentifrice formulation. The results acquired demonstrated that peroxoborate gave rise to ...

A new-type of sulfide containing diacid (1,1′-thiobis(2-naphthoxy acetic acid)) was synthesized from 2-naphthol in three steps. Reaction of 2-naphthol with sulfur dichloride afforded 1,1′-thiobis(2-naphthol) (TBN). 1,1′-Thiobis(2-naphthoxy acetic ester) (TBNAE) was successfully synthesized by...

The goal of this article is to introduce the 6As model of social content management. The paper argues that in order for business managers to deal with social media resources effectively, they need an active and comprehensive approach using a guiding framework. This manuscript summarizes such a f...

The effects of Mentha arvensis L. (MAEO; 0.625 μL/mL) and M. piperita L. (MPEO; 1.25 μL/mL) essential oils on viable cell counts and physiological functions in Escherichia coli, Listeria monocytogenes and Salmonella enterica Serovar Enteritidis in pineapple and mango juice after a 15 min-expos...

Phytochemical investigation on Mentha canadensis led to the isolation of two new compounds, 3,4-dihydro-3,6,7-trihydroxy-2(1H)-quinolinone (1), (E)-2-methoxy-2- oxethyl-3-(4-hydroxyphenyl) acrylate (2), along with nine known phenolic compounds, syringic acid (3), p-coumaric acid (4), esculetin (...

The state-averaged multiconfiguration self-consistent field (MCSCF) method was implemented to the reference interaction site model and three-dimensional reference interaction site model (RISM and 3D-RISM) SCF schemes, where the electronic structures of multiple states and solvation structure are...

For integers k,r>0, a (k,r)-coloring of a graph G is a proper coloring on the vertices of G with k colors such that every vertex v of degree d(v) is adjacent to vertices with at least min{d(v),r} different colors. The r-hued chromatic number, denoted by χr(G), is the smallest integer k for whic...

T. A. Dowling introduced Whitney numbers of the first and second kinds concerning the so-called Dowling lattices of finite groups. It turned out that they are generalizations of Stirling numbers. Later, I. Mező defined r-Whitney numbers as common generalizations of Whitney numbers and r-Stirling...

The paper is focused on the preparation of nanofiber layers of polyesteramides with various ratios of ε-caprolactam/ε-caprolactone structural units. We have studied the effect of the system parameters, i.e., the composition of the copolymer, its molar mass and the concentration of the solution...

Nylon-6 block copolymers with higher impact strength were synthesized using caprolactam as monomer, caprolactam magnesium bromide as catalyst and a telechelic isocyanate-terminated poly(propylene oxide) as macro-activator. various proportions of macro-activator up to 25 wt% were employed in orde...

To adapt liquid reactive processes to thermoplastic composite manufacturing, synthesis kinetics of PA6 from ε-caprolactam monomer have been investigated. This reaction involves simultaneously polymerization of monomers and crystallization of growing chains. It has been studied by DSC over a wid...

Poly[(ɛ-caprolactam)-co-(ɛ-caprolactone)] was prepared by the anionic polymerisation of ɛ-caprolactam in the presence of poly(ɛ-caprolactone) initiated by ɛ-caprolactam magnesium bromide. Copolymers with 10–25% ɛ-caprolactone structure units were subjected to degradation. After 8-weeks abiotic ...

Preparation of polyesteramides–poly[(ε-caprolactam)-co-(ε-caprolactone)]s by anionic polymerization of ε-caprolactam in the presence of poly(ε-caprolactone) at 150 °C was studied in this paper. ε-Caprolactam magnesium bromide was used as an initiator of polymerization and polymeric materi...

Poly[(ε-caprolactam)-co-(ω-laurolactam)] was prepared at two different experimental arrangements — pseudoadiabatically and isothermally. Polymerization activity of two initiators ε-caprolactam magnesium bromide (CLMgBr) or sodium salt of ε-caprolactam (CLNa) in combination with N-benzoyl-ε...

The anionic polymerization of ε-caprolactam initiated with 0.5 mol % ethyl magnesium bromide in the presence of cycloaliphatic esters (lactones), such as γ-butyrolactone, δ-valerolactone and ε-caprolactone, has been studied in the temperature range 150–190 °C and concentration up to 5 mol ...

Polyesteramides derived from the cyclic monomers ε-caprolactam and ε-caprolactone have been synthesized by the anionic polymerization and characterized. ε-Caprolactam magnesium bromide was employed as unique initiator giving high yield of copolymer across the whole range of monomer concentrat...

The sensitivity of so-called non-activated polymerization of ε-caprolactam to the presence of water in the polymerization mixture has been studied. Polymerizations were initiated with 1 mol% sodium salt of ε-caprolactam, magnesium di(ε-caprolactamate) and/or ε-caprolactam magnesium bromide a...

Amidst growing environmental awareness and stringent discharge regulations, chemical and allied process industries are now desperately seeking replacement of the conventional, polluting processes by clean and green processes. In this context, production and purification of amino acids like l-glu...

Fifty five percent of 152 lactic acid bacteria (LAB) isolated from 9 mature Cheddar cheeses were able to catabolise protein hydrolysates and individual amino acids in the Biolog MT1TM microplate assay. A more detailed study of 31 isolates confirmed a requirement for α-ketoglutaric acid and inte...

Oxalacetic acid is reduced in four waves, corresponding to the reduction of the following species: i1a, keto form of the acid; i1b, enol form of the acid; i2, monoanion; i3, dianion. Reduction of the acid and monoanion occurs after protonation of the CO group, that of the dianion on the unproton...