High-Temperature Molecular Ferroelectric Tris(2-hydroxyethyl) Ammonium Bromide with Dielectric Relaxation.

We obtained one new molecular ferroelectric material tris(2-hydroxyethyl) ammonium bromide () that crystallizes in aqueous solution at room temperature with a space group of 3 which belongs to ten polar space groups. There is a paraelectric-to-ferroelectric phase transition at 424 K (from hexagonal 3̅ to hexagonal 3 phase). Such a high transition temperature is close to that of diisopropylamine bromide (426 K) and higher than that of many other molecular ferroelectrics, such as triethylmethylammonium tetrabromoferrate(III) (360 K); some of the organic-inorganic perovskite ferroelectrics, such as (cyclohexylammonium)PbBr (363 K); and some inorganic ferroelectrics, including BaTiO (393 K).

Ferroelectricity of the Orthorhombic and Tetragonal MAPbBr Single Crystal.

Hybrid organic-inorganic halide perovskites (HOIPs) MAPbBr and their ramifications have emerged because of the photovoltaic, optical, and other fascinating performances of HOIPs in recent years. However, many intrinsic properties, such as crystal structure and ferroelectricity, are still controversial. In this work, the ferroelectricity of the orthorhombic and tetragonal MAPbBr single crystal was confirmed through the dielectric behavior versus bias electric field ε( E), the temperature-dependent pyroelectric current with positive/negative poling, and the positive-up-negative-down (PUND) measurements.

Single molecule magnetic behaviour in lanthanide naphthalenesulfonate complexes.

The use of 2-naphthalenesulfonate (NAS) ligand in lanthanide chemistry afforded a family of isostructural mononuclear lanthanide complexes with the formula [Ln(NAS)(HO)](NAS)·3HO [Ln = Tb (1), Dy (2), Er (3), Yb (4)]. Crystallographic studies determined a square antiprismatic geometry (D) for the Ln centre and crystallization in an unprecedented chiral space group. The latter was further confirmed by the observation of Cotton effects in single crystal circular dichroism (CD) spectra.

Hypertriglyceridemic acute pancreatitis in emergency department: Typical clinical features and genetic variants.

Objective: To investigate the clinical characteristics of patients with hypertriglyceridemic acute pancreatitis (HTGAP), and the molecular foundation contributing to hypertriglyceridemia in such patients.

Methods: Clinical data from 329 patients with acute pancreatitis (AP) were analyzed. The patients were divided into the HTGAP group, with fasting serum triglyceride (TG) levels ≥500 mg/dL (5.

[Influence of delayed cord clamping on preterm infants with a gestational age of <32 weeks].

Objective: To investigate the influence of delayed cord clamping (DCC) on preterm infants with a gestational age of <32 weeks.

Methods: Ninety preterm infants with a gestational age of <32 weeks delivered naturally from January to December, 2015 were enrolled and randomly divided into DCC group (46 infants) and immediate cord clamping (ICC) group (44 infants). The routine blood test results, total amount of red blood cell transfusion, blood gas parameters, mean arterial pressure, bilirubin peak, total time of phototherapy, and incidence rates of necrotizing enterocolitis, late-onset sepsis, intracranial hemorrhage, retinopathy, and bronchopulmonary dysplasia were compared between the two groups.

[Rapid diagnosis of Down's and Edward's syndrome by multiplex real-time quantitative PCR].

Objective: To establish a multiplex real-time quantitative PCR method for diagnosis of Down's and Edward's syndrome.

Methods: The sequences of the amyloid precursor protein gene (APP) in the Down's region of chromosome 21 and the thymidylate synthetase gene (TYMS) on chromosome 18 were co-amplified in the same tube. The relative quantitative index DeltaCT value was used to differentiate Down's and Edward's syndrome patient from healthy individual.