Finite time decoherence could be suppressed efficiently in photonic crystal

The decoherence of two initially entangled qubits in anisotropic band gap photonic crystal has been studied analytically without Born or Markovian approximation. It is shown that the decoherence dynamics of two qubits in photonic crystal is greatly different from that of two qubits in vacuum or subjected to usual non-Markovian reservoir. The results also show that the finite time decoherence invoked by spontaneous emission could be suppressed efficiently and the entanglement of the Bell state possesses odd parity is more easily preserved in photonic crystal than that of the Bell state possesses even parity under the same condition. A store scheme for entangled particle pair is proposed.Comment: 4 pages, 7 figure

In vitro anti-tumor activity in SGC-7901 human gastric cancer cells treated with dandelion extract

Purpose: To investigate the mechanisms of cytotoxicity of a dandelion extract against human gastric cancer cell line SGC-7901 cells.Methods: The 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) assay, flow cytometry, and transwell assays were used to investigate the effects of a dandelion extract on cell proliferation, levels of apoptosis, and cell migration, respectively. Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) assessed the effects of a dandelion extract on the expression levels of genes regulating proliferation and apoptosis.Results: Dandelion extract exerted strong cytotoxic effects on the cancer cells. After exposure, apoptotic cells increased and cell migration was reduced. RT-qPCR assay revealed that dandelion extract significantly increased anti-proliferative and pro-apoptotic gene expression, including phosphate and tensin homology deleted on chromosome ten (Pten) and Bcl-2 Associated X protein (Bax) mRNA in the gastric cancer cells. The results also indicate that there was decreased pro-proliferative and antiapoptotic gene expression (i.e., extracellular signal-regulated kinase (Erk), Survivin, and B-cell lymphoma 2 (Bcl2) mRNA).Conclusion: The results suggest that dandelion extract is a potent gastric cancer cell proliferation, survival, and migration inhibitor with potential pharmaceutical applications for the prevention of gastric cancer.Keywords: dandelion extract, gastric cancer, cytotoxic effect, migration inhibitio

Mouse hepatocyte overexpression of NF‐κB‐inducing kinase (NIK) triggers fatal macrophage‐dependent liver injury and fibrosis

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/109646/1/hep27348-sup-0001-suppinfo01.pdfhttp://deepblue.lib.umich.edu/bitstream/2027.42/109646/2/hep27348.pd

Decoherence of two qubits in a non-Markovian reservoir without rotating-wave approximation

The decoherence of two initially entangled qubits in a non-Markovian reservoir has been investigated exactly without Born Markovian approximation and rotating-wave approximation(RWA). The non-perturbative quantum master equation is derived and its exact solution is obtained. The decoherence behaviors of two qubits, initially entangled in Bell states, has been investigated in three different cases of parameters. The results show that the counter-rotating wave terms have great influence on the decoherence behavior, and there are differences between the exact solution of the Hamiltonian with RWA and that of the exact Hamiltonian without RWA. It might be improper to take RWA when the atom is in a non-markovian reservoir

Sulfonated microporous polymer membranes with fast and selective ion transport for electrochemical energy conversion and storage

Membranes with fast and selective transport of protons and cations are required for a wide range of electrochemical energy conversion and storage devices, such as proton-exchange membrane (PEM) fuel cells and redox flow batteries. Here we report a new approach to designing solution-processable ion-selective polymer membranes with both intrinsic microporosity and ion-conductive functionality. This was achieved by synthesizing polymers with rigid and contorted backbones, which incorporate hydrophobic fluorinated and hydrophilic sulfonic acid functional groups, to produce membranes with negatively-charged subnanometer-sized confined ionic channels. The facilitated transport of protons and cations through these membranes, as well as high selectivity towards nanometer-sized redox-active molecules, enable efficient and stable operation of an aqueous alkaline quinone redox flow battery and a hydrogen PEM fuel cell. This membrane design strategy paves the way for producing a new-generation of ion-exchange membranes for electrochemical energy conversion and storage applications

Transcriptional Regulations on the Low-Temperature-Induced Floral Transition in an Orchidaceae Species, Dendrobium nobile: An Expressed Sequence Tags Analysis

Vernalization-induced flowering is a cold-relevant adaptation in many species, but little is known about the genetic basis behind in Orchidaceae species. Here, we reported a collection of 15017 expressed sequence tags (ESTs) from the vernalized axillary buds of an Orchidaceae species, Dendrobium nobile, which were assembled for 9616 unique gene clusters. Functional enrichment analysis showed that genes in relation to the responses to stresses, especially in the form of low temperatures, and those involving in protein biosynthesis and chromatin assembly were significantly overrepresented during 40 days of vernalization. Additionally, a total of 59 putative flowering-relevant genes were recognized, including those homologous to known key players in vernalization pathways in temperate cereals or Arabidopsis, such as cereal VRN1, FT/VRN3, and Arabidopsis AGL19. Results from this study suggest that the networks regulating vernalization-induced floral transition are conserved, but just in a part, in D. nobile, temperate cereals, and Arabidopsis