A 3D extra-large-pore zeolite enabled by 1D-to-3D topotactic condensation of a chain silicate.

Zeolites are microporous silicates with a large variety of applications as catalysts, adsorbents, and cation exchangers. Stable silica-based zeolites with increased porosity are in demand to allow adsorption and processing of large molecules but challenge our synthetic ability. We report a new, highly stable pure silica zeolite called ZEO-3, which has a multidimensional, interconnected system of extra-large pores open through windows made by 16 and 14 silicate tetrahedra, the least dense polymorph of silica known so far.

A stable aluminosilicate zeolite with intersecting three-dimensional extra-large pores.

Zeolites are crystalline porous materials with important industrial applications, including uses in catalytic and adsorption-separation processes. Access into and out of their inner confined space, where adsorption and reactions occur, is limited by their pore apertures. Stable multidimensional zeolites with larger pores able to process larger molecules are in demand in the fine chemical industry and for the oil processing on which the world still relies for fuels.

Hb Hezhou [β64(E8)Gly→Ser; : c.193G>A]: A Novel Variant on the β-Globin Gene.

We report a novel mutation on the β-globin gene, Hb Hezhou [β64(E8)Gly→Ser; : c.193G>A] that was detected in two unrelated Chinese individuals. Patient 1 also carried an α-thalassemia (α-thal) -α (leftward) deletion, but hematological analyses showed no clinical consequences.

SSR1 is involved in maintaining the function of mitochondria electron transport chain and iron homeostasis upon proline treatment in Arabidopsis.

Although increasing intracellular proline under stressed condition could help the plants survive, treating plant with high level of proline under normal condition could be inhibitory to plant growth. Among other possible mechanisms, proline-induced mitochondrial reactive oxygen species (ROS) production due to electron overflow in mitochondria electron transport chain (mETC) caused by elevated proline degradation may contribute to the proline toxicity. However, direct evidences are still elusive.

The F-box protein EST1 modulates salt tolerance in Arabidopsis by regulating plasma membrane Na/H antiport activity.

F-box protein, one of the building blocks of the SCF complex, functions in substrate recognition of the SCF subtype of E3 ubiquitin ligase. However, the role of F-box protein in salt stress is largely elusive in plants. Here, we report the characterization of an Arabidopsis salt-tolerant mutant est1 with significantly reduced sodium content and higher Na/H antiporter activity after NaCl treatment compared to the wild-type.

Cl-Templated Assembly of Novel Peanut-like LnNi Heterometallic Clusters Exhibiting a Large Magnetocaloric Effect.

Two novel and fascinating high-nuclearity lanthanide-transition (4f-3d) heterometallic clusters were obtained based on an anion-template (Cl) and ligand-controlled approach, formulated as [GdNi(CO)(CHCOO)(IDA)(CO)(μ-O)(μ-OH)(μ-O)(HO)]·Cl·20HO (abbreviated as GdNi, ) and [EuNi(CO)(CHCOO)(IDA)(CO)(μ-O)(μ-OH)(μ-O)(HO)]·Cl·23HO (abbreviated as EuNi, ), where HIDA = iminodiacetic acid and HCO = oxalic acid. Structural analysis exhibits that the compounds and were both constructed by two enticing bowl-like anion units LnNi, featuring peanut-like structures. Besides, the assembly of LnNi was templated by five Cl ions.

Synthesis of Nomega-Nitro-l-arginine methyl ester modified reduced graphene oxide nanosheets and their protective action on experimental preeclampsia in mice.

The purpose of this study is to synthesize Nomega-Nitro-L-arginine methyl ester (L-NAME) adsorbed reduced graphene oxide (RGO) sheets and demonstrate their protective impact on the detrimental effect detected in investigational pre-eclampsia, a prerequisite where increase in oxidative stress and decreased Nitric Oxide (NO) production were present. The synthesized graphene sheets were studies by using various characterization techniques. Later, a prerequisite similar to pre-eclampsia has been induced through chronic inhibition of NO fabrication using a 60 mg/kg/day L-NAME, orally in pregnant mice.

Polyoxometalate-Based Well-Defined Rodlike Structural Multifunctional Materials: Synthesis, Structure, and Properties.

The unpredictability of the polyoxometalate (POM) coordination model and the diversity of organic ligands provide more possibilities for the exploration and fabrication of various novel POM-based materials. In this work, a series of POM-based lanthanide (Ln)-Schiff base nanoclusters, [Ln(HO)(DAPSC)][Ln(HO)(DAPSC)][(SiWO)]·15HO (Ln = Sm, 1; Eu, 2; Tb, 3), have been successfully isolated by the reaction of classical Keggin POMs, a Ln ion, and a Schiff-base ligand [2,6-diacetylpyridine bis(semicarbazone), abbreviated as DAPSC]. Both the hindrance effect of the organic ligand and charge balance endow the cluster with fascinating structural features of discrete and linear arrangement.

IDD16 negatively regulates stomatal initiation via trans-repression of SPCH in Arabidopsis.

In Arabidopsis, the initiation and proliferation of stomatal lineage cells is controlled by SPEECHLESS (SPCH). Phosphorylation of SPCH at the post-translational level has been reported to regulate stomatal development. Here we report that IDD16 acts as a negative regulator for stomatal initiation by directly regulating SPCH transcription.

Two new POM-based compounds modified by lanthanide-Schiff base complexes with interesting NLO properties.

Two POM-based lanthanide derivatives, namely {triaqua[2,6-diacetylpyridine bis(semicarbazone)-κO,N,N',N'',O']terbium(III)}-μ-oxido-[tricosa-μ-oxido-dodecaoxido-μ-phosphato-dodecamolybdenum(VI)] pentahydrate (1), [Tb(CHNO)(HO)][PMoO]·5HO, and the dysprosium(III) analogue (2), have been isolated successfully by the reaction of Keggin-POM [PMoO] (abbreviated as PMo), the Ln ion and the Schiff base 2,6-diacetylpyridine bis(semicarbazone) (DAPSC) ligand under hydrothermal conditions. [Ln(DAPSC)(HO)][PMoO]·5HO is a PMo-supported cluster featuring a lanthanide-Schiff base complex [denoted Ln-L(Schiff base)]. Single-crystal X-ray diffraction analysis reveals that the Ln ion is in a distorted tricapped trigonal prismatic arrangement, coordinated by six O atoms and three N atoms.

Exploring the Performance Improvement of Magnetocaloric Effect Based Gd-Exclusive Cluster Gd.

Despite wide potential applications of Gd-clusters in magnetocaloric effect (MCE) owing to f electron configuration of Gd(III), the structural improvement in order to enhance MCE remains difficult. A new approach of the situ hydrolysis of acetonitrile is reported, and the slow release of small ligand CHCOO is realized in the design and synthesis of high-nuclearity lanthanide clusters. A large lanthanide-exclusive cluster complex, [Gd(CO)(CHCOO)(μ-OH)(μ-OH)(HO)](NO3)Br(dmp)·30CHOH·20Hdmp (1-Gd), was isolated under solvothermal conditions.

Two Pairs of Chiral "Tower-Like" Ln Cr (Ln=Gd, Dy) Clusters: Syntheses, Structure, and Magnetocaloric Effect.

Two pairs of novel chiral chromium lanthanide compounds, formulated as l- and d-[Gd Cr (IN) (μ -OH) (μ -O) (H O) ]⋅[IN] ⋅8 H O (1 and 3), and l- and d-[Dy Cr (IN) (μ -OH) (μ -O) (H O) ]⋅[IN]⋅1.5 H O (2 and 4) (HIN=isonicotinic acid) have been successfully synthesized and characterized. Structural analysis reveals that four Ln ions and four Cr ions connect with each other and yield a "tower-like" [Ln Cr ] skeleton.

A Series of Lanthanide Compounds Constructed from Ln Rings Exhibiting Large Magnetocaloric Effect and Interesting Luminescence.

A series of lanthanide compounds, [Ln(CHOHCHOH)(SO)]· m(CHN)· nHO (Ln = Gd (1), Sm (2), Tb (3), La (5), m = 2, n = 2; Ln = Eu (4), m = 0, n = 8), which contain Ln rings by sulfate and glycol as the ligand have been synthesized and characterized. Besides, small organic amine and l-tartaric acid act as dual templating roles during the synthetic process. Magnetic investigation of compound 1 reveals the existence of weak antiferromagnetic interactions between Gd ions and the data of magnetic entropy change (-Δ S) is 36.

Incorporation of Silicon-Oxygen Tetrahedron into Novel High-Nuclearity Nanosized 3d-4f Heterometallic Clusters.

By the anionic template strategy, we have, for the first time, succeeded in introducing SiO into 3d-4f huge clusters, obtaining two novel nanosized clusters with interesting nanosized cores of [LnNiSi] (1, Ln = Gd; 2, Ln = Eu). To the best of our knowledge, they are the largest heterometallic clusters incorporated with Si-O tetrahedra. In addition, compound 1 shows a maximum magnetic entropy (-Δ S) of 40.

Light affects salt stress-induced transcriptional memory of P5CS1 in Arabidopsis.

To cope with environmental stresses, plants often adopt a memory response upon primary stress exposure to facilitate a quicker and stronger reaction to recurring stresses. However, it remains unknown whether light is involved in the manifestation of stress memory. Proline accumulation is a striking metabolic adaptation of higher plants during various environmental stresses.

Genome-wide analysis of phylogeny, expression profile and sub-cellular localization of SKP1-Like genes in wild tomato.

SKP1 is a core component of SCF complex, a major type of E3 ubiquitin ligase catalyzing the last step in ubiquitin-mediated protein degradation pathway. In present study, SKP1 gene family in Solanum pimpinellifolium (SSK), a wild species of tomato, was investigated. A total of 19 SSK genes were identified through homologous search.