Effects of pelvic floor myofascial manipulation intervention on primiparas and neonates during the second stage of vaginal delivery.

A prolonged second stage of vaginal delivery increases the risk of shoulder dystocia, unnecessary episiotomies and cesarean sections. However, no standardized method has been proposed to tackle this issue. The effects of pelvic floor myofascial manipulation intervention during the second stage of labor in primiparas and its prognostic value in neonatal postpartum outcomes remain unknown.

Binuclear cobalt(II) and two-dimensional manganese(II) coordination compounds self-assembled by mixed bipyridine-tetracarboxylic ligands with single-ion magnet properties.

A cobalt(II) complex and manganese(II) coordination polymer, formulated as [Co(Hbtca)(mbpy)][Hbtca]·4HO (1) and {Mn(btca)(mbpy)(HO)} (2) (H = 1,2,4,5-benzenetetracarboxylic acid; = 4,4'-dimethyl-2,2'-bipyridyl), constructed by mixed bipyridine-tetracarboxylic ligands were synthesized and characterized. Single-crystal structural analyses reveal that compound 1 is a discrete neutral binuclear molecule, while compound 2 is a two-dimensional (2D) coordination polymer. The metal ions in these compounds are well isolated, with an intramolecular Co⋯Co distance of 9.

[Field greenhouse gas emission characteristics and carbon footprint of ratoon rice].

It is of great significance to understand the effects of different rice cultivation methods in southeast China on greenhouse gas emission characteristics and carbon footprint of paddy fields during rice cultivation for rice sustainable production. In this study, the popular conventional rice 'Jiafuzhan' and hybrid rice 'Yongyou 2640' were used as materials to establish four rice cultivation patterns suitable for different ecological types in Fujian Province: 1) double-cropping system, early rice and late rice with Jiafuzhan (D-J); 2) early maturing ratooning system, first season rice and ratooning season rice with Jiafuzhan (R-J); 3) middle-maturing ratooning system, first season rice and ratooning season with Yongyou 2640 (R-Y); and 4) single cropping system with Yongyou 2640 (S-Y), which should be synchronized in heading time with the counterpart (the ratooning season rice). Greenhouse gas emissions from paddy soil were measured by the closed static black box observation method and the gas chromatography method, respectively.

Field-induced slow magnetic relaxation behaviours in binuclear cobalt(II) metallocycles and exchange-coupled clusters.

Precise control of the structures and magnetic properties of a molecular material constitutes an important challenge to realize tailor-made magnetic function. Herein, we report that the ligand-directed coordination self-assembly of a dianionic cobalt(II) mononuclear complex and selective organic linkers has led to two distinct dicobalt(II) complexes, [Co(pdms)(bpym)]·2MeCN (1) and [Co(pdms)(bipm)]·3DMF (2) (Hpdms = 1,2-bis(methanesulfonamide)benzene; bpym = 2,2'-bipyrimidine; bimp = 1,4-bis[(1-imidazol-1-yl)methyl]benzene). Structural analyses revealed that complexes 1 and 2 are discrete binuclear molecules containing two neutral {Co(pdms)} species bridged by bpym and bimp ligands, respectively, forming an exchange-coupled CoII2 dimer and a rare CoII2 metallocycle.

Arrb2 causes hepatic lipid metabolism disorder via AMPK pathway based on metabolomics in alcoholic fatty liver.

Background And Aims: Alcoholic fatty liver (AFL) is an early form of alcoholic liver disease (ALD) that usually manifests as lipid synthesis abnormalities in hepatocytes. β-arrestin2 (Arrb2) is involved in multiple biological processes. The present study aimed to explore the role of Arrb2 in the regulation of lipid metabolism in AFL and the underlying mechanism and identify potential targets for the treatment of AFL.

Two three-dimensional [Mo(CN)]-based magnets showing new topologies and ferrimagnetic ordering below 80 K.

The rational design and synthesis of heptacyanomolybdate-based magnets remain a challenge due to the complexity of this system. Here, we reported the crystal structures and magnetic properties of two three-dimensional (3D) frameworks prepared from the self-assembly of the [Mo(CN)] unit with Mn ions in the presence of different amide ligands, namely Mn(DMF)(HO)[Mo(CN)]·HO·CHOH (1) and Mn(DEF)(HO)[Mo(CN)] (2) (DMF = N,N'-dimethylformamide and DEF = N,N'-diethylformamide). Single-crystal structure determinations showed that compound 1 crystallizes in the triclinic space group Pī, while 2 crystallizes in the monoclinic space group P2/n.

Single-ion magnetism in seven-coordinate Yb complexes with distorted D coordination geometry.

Two seven-coordinate compounds with pentagonal bipyramidal Yb centers, namely, [Yb(HBmshp)(DMF)Cl]·DMF·1.5HO (1) and [Yb(HBmshp)(DMF)Cl]·HBmshp (2) (HBmshp = (2,6-bis[(3-methoxysalicylidene)hydrazinecarbonyl]-pyridine)) were synthesized by changing the molar ratio of reactants in DMF. The structures of compounds 1 and 2 are very similar, except for the existence of different lattice molecules: one DMF and one and a half water molecules in 1, and one neutral uncoordinated ligand in 2.

Reversible On-Off Switching of a Single-Molecule Magnet via a Crystal-to-Crystal Chemical Transformation.

Dynamic molecular crystals are of high interest due to their potential applications. Herein we report the reversible on-off switching of single-molecule magnet (SMM) behavior in a [Mo(CN)] based molecular compound. Upon dehydration and rehydration, the trinuclear MnMo molecule [Mn(L)(HO)][Mo(CN)]·2HO (1) undergoes reversible crystal-to-crystal transformation to a hexanuclear MnMo compound [Mn(L)(HO)][Mn(L)][Mo(CN)] (2).

Slow Magnetic Relaxation in One-Dimensional Azido-Bridged Co Complexes.

Crystal structures and magnetic properties of three one-dimensional (1D) azido-bridged cobalt(II) chains with different amide ligands (L), [Co(N)(DMF)] (1), [Co(N)(DEF)] (2), and [Co(N)(DIPF)] (3) (DMF = N,N-dimethylformamide, DEF = N,N-diethylformamide, and DIPF = N,N-diisopropylformamide), are reported to investigate the influence of L on their structures and magnetic properties. Single-crystal X-ray crystallographic analysis revealed that, although 1-3 all consist of cobalt chains bridged by end-on (EO) azides, the coordination geometry of the Co ions and the repeating units of the 1D structures are quite different. As the size of L increases, the ratio of L to Co decreases from 6:4 in 1 to 5:4 and 4:4 in 2 and 3, respectively.

Three-Dimensional Fe-[Mo(CN)] Magnets with Ordering below 65 K and Distinct Topologies Induced by Cation Identity.

Two cyanide-bridged compounds based on the Fe cation and the anisotropic [Mo(CN)] anion, namely, {Fe(HO)[Mo(CN)]·5HO} (1) and {[NH(CH)]Fe(HO)[Mo(CN)]·8HO} (2), have been prepared. Single crystal X-ray analyses revealed that their structures exhibit different three-dimensional topologies as a result of the addition of [NH(CH)] during the synthesis of 2. For both 1 and 2, the geometry of the [Mo(CN)] unit is a slightly distorted capped trigonal prism; all Fe centers are hexacoordinate and adopt a distorted octahedral configuration.

[Determination of microelements in C. tangutica (Maxim.) korsh flower by FAAS].

The powder was digested with HNO3-HClO4 mixed acid (4 : 1) before determination. The eleven microelements in C. tangutica (Maxim.

[Determination of microelements in different parts of Limonium bicolor by FAAS].

Eight microelements in the flower, stem, leaf and root of limonium bicolor were determined by FAAS. Different parts of the powder were digested with HNO3-HClO4 mixed acid (4+1) before the determination. Work conditions, accuracy and precision of the method were studied.