Amorphous silicon nitride is a model system for a covalently bound amorphous solid with a low atomic mobility where reasonable values of self-diffusivities are still lacking. We used neutron reflectometry on isotope enriched Si3 14N4/Si3 15N4 multilayers to determine nitrogen self-diffusivities ranging from 10(-24) to 10(-21) m2/s between 950 and 1250 degrees C. Time dependent diffusivities obs...

Behavioral homology is often assumed to involve similarity in underlying neuronal mechanisms. Here, we provide a counterexample where homologous behaviors are produced by neurons with different synaptic connectivity. The nudibranch molluscs Melibe leonina and Dendronotus iris exhibit homologous swimming behaviors, consisting of alternating left and right body flexions. The swim central pattern ...

The conformational dynamics of the polymorphous trigger loop (TL) in RNA polymerase (RNAP) underlie multiple steps in the nucleotide addition cycle and diverse regulatory mechanisms. These mechanisms include nascent RNA hairpin-stabilized pausing, which inhibits TL folding into the trigger helices (TH) required for rapid nucleotide addition. The nascent RNA pause hairpin forms in the RNA exit c...

The central pattern generator (CPG) underlying the rhythmic swimming behavior of the nudibranch Melibe leonina (Mollusca, Gastropoda, Heterobranchia) has been described as a simple half-center oscillator consisting of two reciprocally inhibitory pairs of interneurons called swim interneuron 1 (Si1) and swim interneuron 2 (Si2). In this study, we identified two additional pairs of interneurons t...

Rong Yu1,2 and Qimiao Si3 1Department of Physics, Renmin University of China, Beijing 100872, China 2Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China and Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China 3Department of Physics & Astronomy, Rice University, Houston, Texas 77005, USA (Received 13 May 2017; published 7 Sept...

pyrophyllite solid solutions, AlrSi.-.Al,oro-.(oHr*"), have been synthesized from a gel and from lightly ground and milled natural materials. Solid solutions crystalliTe from structurally degraded or amorphous starting materials due to the tendency for Al3* to enter tetrahedral sites. The extent of solid solution is small; synthesis from a gel yielded pyrophyllite with the formula Al2 o(Si3 rAL...

Abstract. Severe ice conditions in the Bohai Sea could cause serious harm to maritime traffic, offshore oil exploitation, aquaculture, and other economic activities surrounding regions. In addition providing sea forecasts for disaster prevention risk mitigation, numerical models help explain variability within context of climate change marine ecosystems, such as spotted seals, which are only ic...

BACKGROUND Acupuncture has been used as a common therapeutic tool in many disorders including anxiety and depression. Serotonin transporter (SERT) plays an important role in the pathology of anxiety and other mood disorders. The aim of this study was to evaluate the effects of acupuncture on lipopolysaccharide (LPS)-induced anxiety-like behaviors and SERT in the dorsal raphe nuclei (DRN). MET...

SI1: Sample characterization by HPLC and CW-EPR spectroscopy. Figure S1: (a) Anion exchange traces of purified single-stranded double-C T -labeled RNAs. (b) Spin concentration calibration curve. (c) RNA labelling efficiency. SI2: Examination of orientation selection. Figure S2: Highand low-power Q-band DEER on [13,28] RNA duplex. Figure S3: High-power Q-band DEER on different RNA samples. Figur...

The reactivity of the 2-phosphaethynolate anion (PCO(-)) towards a cyclic trisilene (cSi3(Tip)4) is reported. The result is the net activation of the P-C and Si-Si multiple bonds of the precursors affording a heteroatomic bicyclo[1.1.1]pentan-2-one analogue ([P(CO)Si3(Tip)4](-); 1). This reaction can be interpreted as the formal addition of a phosphide and a carbonyl across the Si-Si double bon...