Preparation of thioglycerol-modified silica through thiol-epoxy click reaction and its application in HILIC for detection of oligosaccharide in beverages.

A novel preparation scheme of thioglycerol-modified silica through thiol-epoxy click reaction was proposed aiming at introducing additional quantities of hydroxyl groups into the structure. When applied as the stationary phase of hydrophilic interaction liquid chromatography (HILIC) for separation of oligosaccharide compounds, the material revealed higher polar separation capability than which synthesized through traditional thiol-ene click reaction. Hydrogen-bond interactions were speculated to be the predominant retention mechanism, while partitioning also participated in the retention of disaccharides and trisaccharides.

Lamiophlomis rotata Identification via ITS2 Barcode and Quality Evaluation by UPLC-QTOF-MS Couple with Multivariate Analyses.

(), is known as "Daba" in the Tibetan region, and have also been utilized as substitutes for "Daba", however, only has been officially listed in the Chinese Pharmacopoeia for hemostasis preparations. To safely apply the traditional uses of the herb, internal transcribed spacer 2 (ITS2) DNA barcodes were employed to discriminate from its adulterants. For further evaluation of the quality of different originating habitats, the chemical profiles of 25 samples were determined by ultra-high-performance liquid chromatography coupled with time-of-flight mass spectrometry (UPLC-QTOF-MS) coupled with multivariate analyses.

1199G>A Polymorphism Affects the Intracellular Accumulation of Antidepressants in LLC-PK1 Recombinant Cell Lines.

ATP-binding cassette, subfamily B, member 1 () transport, or P-glycoprotein (P-gp), is a transport protein that is involved in the absorption and the efflux of some antidepressants, such as selective serotonin reuptake inhibitors. The purpose of the current research was to assess the influence of the 1199G>A polymorphism on P-gp-mediated efflux ability toward escitalopram, citalopram, paroxetine, fluoxetine, and sertraline. Two recombinant LLC-PK1 cell systems transfected with 1199G and 1199A alleles were constructed.

The similarity and variability of the iridoid glycoside profile and antioxidant capacity of aerial and underground parts of according to UPLC-TOF-MS and multivariate analyses.

() is a Tibetan medicinal herb used for centuries that contains iridoid glycosides (IGs), which are pharmacologically active ingredients and can be used for quality control. The IG profiles of the underground and aerial parts of the plant were determined by UPLC-TOF-MS to evaluate the similarity and variability of the different herbal parts listed in the Chinese Pharmacopoeia. Twenty-six IGs were detected in the total ion current (TIC) profile of , and twenty-two of these were identified by comparing the retention times and mass spectra of the compounds to those of authentic standards.

Molecular cloning, characterization and expression of the energy homeostasis-associated gene in piglet.

The energy homeostasis-associated (Enho) gene encodes a secreted protein, adropin, which regulates the expression of hepatic lipogenic genes and adipose tissue peroxisome proliferator-activated receptor γ, a major regulator of lipogenesis. In the present study, the porcine (Sus scrofa) homologue of the Enho gene, which was named pEnho, was amplified by reverse transcriptase polymerase chain reaction (RT-PCR) using oligonucleotide primers derived from in silico sequences. The gene sequence was submitted into the GenBank of NCBI, and the access number is GQ414763.

Photoinduced intramolecular charge transfer and S2 fluorescence in thiophene-pi-conjugated donor-acceptor systems: experimental and TDDFT studies.

Experimental and theoretical methods were used to study newly synthesized thiophene-pi-conjugated donor-acceptor compounds, which were found to exhibit efficient intramolecular charge-transfer emission in polar solvents with relatively large Stokes shifts and strong solvatochromism. To gain insight into the solvatochromic behavior of these compounds, the dependence of the spectra on solvent polarity was studied on the basis of Lippert-Mataga models. We found that intramolecular charge transfer in these donor-acceptor systems is significantly dependent on the electron-withdrawing substituents at the thienyl 2-position.

mu-Oxo-bis{[(6-hydroxymethyl-2-pyridylmethyl)bis(2-pyridylmethyl)amine-kappa)N,N',N'',N''',O]iron(III)} tetrakis(perchlorate).

The novel mu-oxo-diiron complex [Fe2O(BPHPA)2](ClO4)4 [BPHPA is (6-hydroxymethyl-2-pyridylmethyl)bis(2-pyridylmethyl)amine, C19H20N4O], contains a binuclear centrosymmetric [Fe2O(BPHPA)2]4+ cation (the bridging O atom lies on an inversion centre) and four perchlorate anions. Each iron ion is coordinated by four N atoms [Fe-N = 2.117 (5)-2.