Application of natural shoulder delivery combined with free position delivery in maternal delivery.

Objective: This research was designed to probe into the influences of natural shoulder delivery combined with free position delivery on pregnant outcome and genital tract of puerperants.

Methods: Totally 128 puerperants who gave birth in our hospital from May 2018 to November 2019 were selected as the research objects. Among them, 66 in traditional position combined with traditional shoulder delivery were assigned to a conventional group (CG), and 62 in free position combined with natural shoulder delivery were assigned to a research group (RG).

A study on the electrochemical behavior of hydroquinone at a nanometer cobalt/l-glutamate-modified electrode.

A new electrochemical sensor for hydroquinone (HQ) was prepared. The electrochemical sensor was modified by electrodeposition and electrochemical polymerization to modify nanometer cobalt (nano-Co) and poly-l-glutamic acid (poly-l-glu) on the surface of a glassy carbon electrode (GCE). Then, the electrochemical behavior of hydroquinone on the electrochemical sensor was investigated by cyclic voltammetry (CV).

A novel label-free solid-state electrochemiluminescence sensor based on the resonance energy transfer from Ru(bpy) to GO for DNA hybridization detection.

Based on electrochemiluminescence resonance energy transfer (ERET) from Ru(bpy) to graphene oxide (GO), a novel label-free solid-state ECL sensor for sensitive detection of DNA was proposed. First, Ru(bpy)/AuNPs was successfully prepared by using a simple and green method and characterized by transmission electron microscopy (TEM), Energy Dispersive X-ray (EDX), and UV-vis spectroscopy. Then, the Ru(bpy)/AuNPs colloid was assembled on the gold electrode surface for solid-state ECL film which also later could be used to immobilize thiol-derivatized, single-stranded DNA (HS-ssDNA) via Au-S interactions.

Atmospheric chemistry of CFClO: a theoretical study on mechanisms and kinetics of the CFClO + HO reaction.

The singlet and triplet potential energy surfaces of the HO with CFClO reaction have been probed at the BMC-CCSD/cc-pVTZ level according to the B3LYP/6-311++G(d,p) level obtained geometrical structure. On the singlet PES, the association/dissociation, direct H- abstraction, and S2 displacement mechanisms have been taken into account. On the triplet PES, S2 displacement and indirect H- abstraction reaction mechanisms have been investigated and the H- abstraction channel makes more contribution to the CFClO with HO reaction.

Theoretical investigations on mechanisms and pathways of CHClO/CHClO with ClO reactions in the atmosphere.

A global and systematic theoretical research on the singlet and triplet potential energy surfaces (PESs) of the CHClO/CHClO with ClO reactions are done at the CCSD(T)//B3LYP level and accompanied with RRKM computations to forecast the mechanism and distribution of products. The simulation results revealed that, on the singlet PES, products P1 (CHClO + HO + Cl)/P1 (CClO + HO + Cl) from IM1 (CHClOOOCl)/IM1 (CHClOOOCl) are forecasted to the primary products of the CHClO/CHClO + ClO reactions, which are initiated by the oxygen atom of ClO radical addition to the terminal-O atom of CHClO/CHClO barrierlessly, while other product channels contribute less to the whole reactions owing to higher barriers. Two other isomers, including IM2 (CHClOOClO) and IM3 (CHClOClO) for the CHClO + ClO reaction, and three other isomers, including IM2 (CHClOOClO), IM3 (CHClOClO), and IM4 (CHClClO) for the CHClO + ClO reaction, could be produced as less significant products.

Computational study on the mechanisms and kinetics of the CH = CHCHF with O(P) reaction.

The potential energy surface for the reaction of O(P) with CH = CHCHF has been studied at the CCSD(T)//M06-2X level of theory. Three different reaction entrances were revealed, namely, terminal-C addition, central-C addition, and H(or F)-abstraction, leading to CHOCHCHF (IM1), CHCHOCHF (IM2) and HO + CHI (OF + CH), respectively. The corresponding activation barriers are 3.

Determination of malachite green in fish based on magnetic molecularly imprinted polymer extraction followed by electrochemiluminescence.

A novel procedure for selective extraction of malachite green (MG) from fish samples was set up by using magnetic molecularly imprinted polymers (MMIP) as the solid phase extraction material followed by electrochemiluminescence (ECL) determination. MMIP was prepared by using Fe3O4 magnetite as magnetic component, MG as template molecule, methacrylic acid (MAA) as functional monomer and ethylene glycol dimethacrylate (EGDMA) as crosslinking agent. MMIP was characterized by SEM, TEM, FT-IR, VSM and XRD.

Determination of m-dinitrobenzene based on novel type of sensor using thiol-porphyrin mixed monolayer-tethered polyaniline with intercalating fullerenols.

A novel sensor based on thiol-porphyrin mixed monolayer-tethered polyaniline (PANI) with intercalating fullerenols was applied to sensitively detect m-dinitrobenzene (m-DNB) by differential pulse voltammetry (DPV). The thiolated polyaniline was examined by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The electrode modification of thiol-porphyrin mixed monolayer-tethered polyaniline with intercalating fullerenols exhibited a higher analytical sensitivity versus that of thiol-porphyrin mixed monolayer-tethered polyaniline, because the fullerenols in mixed monolayer could improve the preconcentration efficiencies of m-DNB.

An electrochemical glutathione biosensor: ubiquinone as a transducer.

In this paper, coenzyme Q10 (Ubiquinone, CoQ10) was used for the first time as a transducer to construct electrochemical biosensor for effectively detecting γ-L-glutamyl-L-cysteinyl-glycine (glutathione, GSH). CoQ10 modified electrode was fabricated by attaching its gel mixed with multi-walled carbon nanotubes (MWNTs)/ionic liquid (IL). In the optimum conditions, based on the increasing of reduction peak current of CoQ10 caused by GSH through voltammetric technology, it was found that the peak current of CoQ10 was linear with the concentration of GSH in the range from 4.

Quenching of the electrochemiluminescence of Ru(bpy)₃²⁺/TPA by malachite green and crystal violet.

Efficient and stable quenching of electrochemiluminescence of Ru(bpy)3(2+)/TPA by malachite green(MG) and crystal violet(CV) at the glass carbon (GC) electrode is reported. A novel quenching mechanism has been proposed. Resonance energy transfer from the excited-state luminophore Ru(bpy)3(2+*) to MG/CV and dynamic quenching are suggested as the mechanism for quenching ECL.

(Z)-4-Bromo-N-{(Z)-3-[(4-bromo-2,6-diisopropyl-phen-yl)imino]-butan-2-yl-idene}-2,6-diisopropyl-aniline.

The title compound, C(28)H(38)Br(2)N(2), is centrosymmetric with the mid-point of the central C-C bond of the butyl group located on an inversion center. The terminal benzene ring is approximately perpendicular to the central 1,4-diaza-butadiene mean plane [dihedral angle = 78.23 (3)°].

Self-quenching in the electrochemiluminescence of tris(2,2'-bipyridyl) ruthenium(ii) using metabolites of catecholamines as co-reactants.

Electrochemiluminescence (ECL) of Ru(bpy)(3)(2+) using metabolites of catecholamines: homovanillic acid (HVA) and vanillylmandelic acid (VMA) as co-reactants were investigated in aqueous solution for the first time. When HVA and VMA were co-existent in the buffer solution containing Ru(bpy)(3)(2+), ECL peaks were observed at a potential corresponding to the oxidation of Ru(bpy)(3)(2+), and the ECL intensity was increased noticeably when the concentrations of HVA and VMA were at lower levels. The linear calibration range was from 8.

[Determination of diosgenin and ruscogenin in Radix Ophiopogonis by nonaqueous capillary electrophoresis].

Nonaqueous capillary electrophoresis is used for the determination of the contents of diosgenin and ruscogenin in Radix Ophiopogonis. The operating buffer was composed of 20 mmol x L(-1) Na2B4O7-HCl (pH 7.61) in 70% methanol.