1,579 research outputs found
Opinion dynamics on directed small-world networks
In this paper, we investigate the self-affirmation effect on formation of
public opinion in a directed small-world social network. The system presents a
non-equilibrium phase transition from a consensus state to a disordered state
with coexistence of opinions. The dynamical behaviors are very sensitive to the
density of long-range interactions and the strength of self-affirmation. When
the long-range interactions are sparse and individual generally does not insist
on his/her opinion, the system will display a continuous phase transition, in
the opposite case with high self-affirmation strength and dense long-range
interactions, the system does not display a phase transition. Between those two
extreme cases, the system undergoes a discontinuous phase transition.Comment: 6 pages, 5 figure
2-(Benzotriazol-1-ylmethylamino)benzoic acid
The title compound, C14H12N4O2, a new N,O,N′-tridentate ligand, is V-shaped with the mean plane through the benzotriazole system [planar to within 0.013 (2) Å] inclined by 67.7 (1)° to the mean plane through the benzene ring. In the molecule there is an intramolecular N—H⋯O hydrogen bond involving the amine H atom and the carbonyl O atom. In the crystal structure, symmtry-related molecules are connected by intermolecular O—H⋯N and C—H⋯O hydrogen bonds and C—H⋯π interactions
Characterization of the early fiber development gene, Ligon-lintless 1 (Li1), using microarray
AbstractCotton fiber length is a key factor in determining fiber quality in the textile industry throughout the world. Understanding the molecular basis of fiber elongation would allow for improvement of fiber length. Ligon-lintless 1 (Li1) is a monogenic dominant mutation that results in short fibers. This mutant provides an excellent model system to study the molecular mechanisms of cotton fiber elongation. Microarray technology and quantitative real time PCR (qRT-PCR) were used to evaluate differentially expressed genes (DEGs) in the Ligon-lintless 1 (Li1) mutant compared to the wild-type. Although the results showed only a few differentially expressed genes at −1, 3 and 7days post anthesis (DPA); at 5 DPA, there were 1915 DEGs, including 984 up-regulated genes and 931 down-regulated genes. The critical stage for early termination of Li1 fiber elongation was 5 DPA, as there were the most differentially expressed genes in this sample. The transcription factors and other proteins identified might contribute to understanding the molecular basis of early fiber elongation. Gene ontology analysis identified some key GO terms that impact the regulation of fiber development during early elongation. These results provide some fundamental information about the TFs that might provide new insight into understanding the molecular mechanisms governing cotton fiber development
Proposal for observing Yang-Lee criticality in Rydberg atomic arrays
Yang-Lee edge singularities (YLES) are the edges of the partition function
zeros of an interacting spin model in the space of complex control parameters.
They play an important role in understanding non-Hermitian phase transitions in
many-body physics, as well as characterizing the corresponding non-unitary
criticality.Even though such partition function zeroes have been measured in
dynamical experiments where time acts as the imaginary control field,
experimentally demonstrating such YLES criticality with a physical imaginary
field has remained elusive due to the difficulty of physically realizing
non-Hermitian many-body models. We provide a protocol for observing the YLES by
detecting kinked dynamical magnetization responses due to broken PT symmetry,
thus enabling the physical probing of non-unitary phase transitions in
non-equilibrium settings. In particular, scaling analyses based on our
non-unitary time evolution circuit with matrix product states (tMPS) accurately
recover the exponents uniquely associated with the corresponding non-unitary
CFT. We provide an explicit proposal for observing YLES criticality in Floquet
quenched Rydberg atomic arrays with laser-induced loss, which paves the way
towards an universal platform for simulating non-Hermitian many-body dynamical
phenomena.Comment: 19 pages, 11 figure
Genetic polymorphisms of TLR3 are associated with Nasopharyngeal carcinoma risk in Cantonese population
<p>Abstract</p> <p>Background</p> <p>Nasopharyngeal carcinoma is endemic in Southern China, displays a strong relationship with genetic susceptibility and associates with Epstein-Barr virus infection. Toll-like receptor 3 (TLR3) plays an important role in the antivirus response. Therefore, we examined the association between <it>TLR3 </it>gene polymorphisms and NPC susceptibility.</p> <p>Methods</p> <p>We performed a case-control study of 434 NPC cases and 512 healthy controls matched on age, sex and residence. Both cases and controls are of Cantonese origin from Southern China. Genetic variants in <it>TLR3 </it>were determined by polymerase chain reaction (PCR)-based DNA direct sequencing and four SNPs were genotyped in all samples.</p> <p>Results</p> <p>Our results showed that allele C for SNP 829A/C increased NPC risk significantly ((p = 0.0068, OR = 1.49, 95%CI:1.10–2.00). When adjusted for age, gender and VCA-IgA antibody titers, the NPC risk was reduced significantly among individuals who carried the haplotype "ATCT" compared to those who carried the most common haplotype "ACCT" (p = 0.0054, OR = 0.028; 95% CI (0.002–0.341).</p> <p>Conclusion</p> <p>The <it>TLR3 </it>polymorphisms may be relevant to NPC susceptibility in the Cantonese population, although the reduction in NPC risk is modest and the biological mechanism of the observed association merits further investigation.</p
Oxonium picrate
The title compound, H3O+·C6H2N3O7
−, consists of one picrate anion and one oxonium cation. The oxonium cation is located on a crystallographic twofold axis and both its H atoms are disordered, each over two symmetry-equivalent positions with occupancy ratios of 0.75. The picrate anions are also located on twofold axes bisecting the phenolate and p-nitro groups. π–π interactions between the rings of the picrates [centroid-to-centroid distances of 3.324 (2) Å] connect the anions to form stacks along the a-axis direction. The stacks are further joined together by the protonated water molecules through hydrogen bonds to form two-dimensional sheets extending parallel to the ab plane. The sheets are stacked on top of each other along the c-axis direction and connected through C—H⋯O interactions between the CH groups of the benzene rings and the picrate nitro groups, with C⋯O distances of 3.450 (2) Å
N-Phenylpyridine-2-carbamide
In the title compound, C12H10N2O, the dihedral angle between the pyridine ring system and the phenyl ring is 1.8 (1)°. There is an intramolecular N—H⋯N hydrogen bond between the pyridine N atom and the amide NH function
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