(R)-(+)-Paraconic acid 4, (S)-(−)-terebic acid 6 and their corresponding methyl and ethyl esters having ee’s ranging from 60% to 92% were obtained by enzymatic resolution of their racemates. The enzymatic resolution of racemic ethyl γ-methylparaconates 14a and 14b allowed the isolation of the ...

Enantiomerically pure 4-methyl-tetrahydro-5-oxo-2-furancarboxylic acids and esters are prepared by enzymatic resolution of the chiral racemic esters. Their stereochemistry as well as their absolute configurations have been established by chemical correlation. The influence of the alkoxycarbonyl ...

1,6-Oxido(10)annulene (1) forms -according to nmr- quantitatively the 1-naphtholate anion (3 upon reaction with potassium amide in liquid ammonia at low temperature.

The solvent effect on the emission and absorption properties of the β-naphtholate anion was studied and the lifetimes measured. In all solvents only a single peak is observed in the spectra. In spite of the lack of resolved spectral bands, the combination of shifts and lifetimes made it possibl...

In this paper, we propose an “off–on” approach for the detection of sodium dodecyl-benzenesulfonate (SDBS) using carbon dots (CDs) as fluorescent probe. We firstly demonstrated that the fluorescence of CDs decreased apparently in the presence of ruthenium (Ru), and the system was thus “turn-...

Two bands of unequal intensity and half-width are found in the OD stretching region of the room-temperature spectra of slightly deuterated ammonium 4-methyl-benzenesulfonate. The bond at higher frequencies is broader and more intense than that having a lower frequency value. Such a spectral pi...

The series of pyridinium (1–10) and quinolinium (11–20) stilbene benzenesulfonates have been synthesized and their structures were investigated by UV–vis, FT-IR and 1H NMR spectroscopy. In addition, compound 5 was also determined by single crystal X-ray diffraction technique. The antibacteria...

An organic nonlinear optical bulk single crystal, Ammonium 3-carboxy-4-hydroxy benzenesulfonate monohydrate (ACHBS) was successfully grown by solution growth technique. Single crystal X-ray diffraction study confirms that, the grown crystal belongs to P21/c space group. Powder X-ray diffraction ...

Micellization mechanism of biosurfactant/synthetic surfactant systems is essential in predicting their industrial applications. Biosurfactant, [Glu1,Asp5]-C15 surfactin, mixing with three isomers of sodium cetyl benzenesulfonate (SCBS) with benzenesulfonate attached at the 2nd, 5th, 8th carbon o...

In the present study poly(propylene sebacate) (PPSeb) nanocomposites containing 2 wt% of fumed silica nanoparticles (SiO2) or multiwalled carbon nanotubes (MWCNTs), or montmorillonite (MMT) were prepared by in situ polymerization. The thermal degradation of nanocomposites was studied using therm...

The present work reports on the development of a new generation of Lab-on-a-chip (LOC) to perform in-situ and real-time potentiometric measurements in flowing water. The device consisted of two differentiated parts: a poly (dimethylsiloxane) (PDMS) microfluidic structure obtained by soft lithogr...

The present study discusses polyethylene sebacate (PES)–doxorubicin (DOX) nanoparticles (PES–DOX NP) using pullulan as asialoglycoprotein receptor (ASGPR) ligand for hepatic targeting. Pullulan, a hydrophilic polymer served as ligand and as stealth agent. PES–DOX NP were prepared by modified ...

Nalbuphine is a semi-synthetic opioid indicated for the relief of moderate to severe pain. Dinalbuphine sebacate (DNS) is a prodrug of nalbuphine for which we have developed long-acting lipophilic formulations in a benzyl benzoate/sesame oil mixture for intramuscular (IM) injection. In this stud...

Poly(glycerol sebacate) (PGS) has been proposed for tissue engineering applications owing to its tough elastomeric mechanical properties, biocompatibility and controllable degradation. However, PGS shows limited bioactivity and thus constraining its utilization for musculoskeletal tissue enginee...

Developing electroactive elastic scaffolds with micropatterned surface would be beneficial for cardiac therapy due to their capability of mimicking the anisotropy, electrical propagation, and mechanical property of native myocardium. In this study, we presented a series of micropatterned, electr...

In this study, inhibition of tall oil fatty acid hydrodeoxygenation (HDO) activity due to addition of rosin acid over sulfided NiMo/Al2O3 was investigated. Oleic acid and abietic acid were used as model compounds for fatty acid and rosin acid respectively in tall oil. After completion of each HD...

High pressure, single pulse shock tube oxidation experiments were conducted in order to probe the chemical kinetic effects of the double bond position in long alkenes. All oxidation experiments were carried out with approximately 100 ppm of 1-decene, cis-2-decene, cis-5-decene, and trans-5-decen...

Mass spectra of cis- and trans-2-decene were obtained at 15, 20, 23 and 26 eV by electron impact and 950 Å (13.0 eV), 826 Å (15.0 eV) and 584 Å (21.2 eV) by photoionization using synchrotron radiation. The spectral differences are discussed primarily in terms of energy transfer function differences.

The colours used in Pre-Hispanic Mesoamerica to decorate walls, codices or artefacts have been the subject of numerous studies, with particular attention to Maya blue, red and white pigments. However, most of these studies have been focused on emblematic cultures of the Classic period (ca. 300–...

Solubility of cis-5-norbornene-endo-2,3-dicarboxylic anhydride (carbic anhydride) in fourteen pure solvents including methyl acetate (MAC), ethyl acetate (EAC), n-propyl acetate (NPAC), isopropyl acetate (IPAC), n-butyl acetate (NBAC), n-amyl acetate (NAAC), isoamyl acetate (IAAC), hexyl acetate...