1,983 research outputs found
RNA interference technology's research progress in the treatment of retinal disease
RNA interference exists widely in animals, which can induce specific genetic sequence to silence by double-stranded RNA molecules at the mRNA level. As a kind of new methods of blocking gene expression, RNA interference technology has become increasingly mature and perfect, it has opened up a new approach of gene therapy. RNA interference can effectively prevent the formation of new vessels in retina, restrain the occurrence and development of the proliferative vitreous retinopathy, and induce apoptosis of retinoblastoma cells. The research progress of the RNA interference in the above retinopathy was summarized in this review
Aqua(cyanido-κC){6,6′-dimethoxy-2,2′-[o-phenylenebis(nitrilomethanylylidene)]diphenolato-κ4 O 1,N,N′,O 1′}cobalt(III) acetonitrile monosolvate
In the title complex, [Co(C22H18N2O4)(CN)(H2O)]·CH3CN, the CoIII ion is six-coordinated in a distorted octahedral environment defined by two N atoms and two O atoms from a salen ligand in the equatorial plane and one O atom from a water molecule and one C atom from a cyanide group at the axial positions. O—H⋯O hydrogen bonds connect adjacent complex molecules into dimers. C—H⋯N hydrogen bonds and π–π interactions between the benzene rings [centroid–centroid distances = 3.700 (2) and 3.845 (2) Å] are also present
The SU(3) bosons and the spin nematic state on the spin-1 bilinear-biquadratic triangular lattice
A bond-operator mean-field theory in the SU(3) bosons representation is
developed to describe the antiferro-nematic phase of the spin-1
bilinear-biquadratic model. The calculated static structure factors reveal
delicately that the antiferro-nematic state may exhibit both the ferro- and
antiferro-quadruple long-range orders, which is reminiscent of the ferrimagnets
or the canted antiferromagnets. This result may influence the spin wave theory
concerned with this phase. Possible relevance of this unconventional state to
the quasi-two-dimensional triangular material NiGa2S4 is addressed.Comment: 8pages, 6figure
Aquacyanido{6,6′-dimethoxy-2,2′-[1,2-phenylenebis(nitrilomethanylylidene)]diphenolato}cobalt(III) acetonitrile hemisolvate
In the title complex, [Co(C22H18N2O4)(CN)(H2O)]·0.5CH3CN, the CoIII cation is N,N′,O,O′-chelated by a 6,6′-dimethoxy-2,2′-[1,2-phenylenebis(nitrilomethanylylidene)]diphenolate dianion, and is further coordinated by a cyanide anion and a water molecule in the axial sites, completing a distorted octahedral coordination geometry. In the crystal, pairs of bifurcated O—H⋯(O,O) hydrogen bonds link adjacent molecules, forming centrosymmetric dimers. The acetonitrile solvent molecule shows 0.5 occupancy
MaskCL: Semantic Mask-Driven Contrastive Learning for Unsupervised Person Re-Identification with Clothes Change
This paper considers a novel and challenging problem: unsupervised long-term
person re-identification with clothes change. Unfortunately, conventional
unsupervised person re-id methods are designed for short-term cases and thus
fail to perceive clothes-independent patterns due to simply being driven by RGB
prompt. To tackle with such a bottleneck, we propose a semantic mask-driven
contrastive learning approach, in which silhouette masks are embedded into
contrastive learning framework as the semantic prompts and cross-clothes
invariance is learnt from hierarchically semantic neighbor structure by
combining both RGB and semantic features in a two-branches network. Since such
a challenging re-id task setting is investigated for the first time, we
conducted extensive experiments to evaluate state-of-the-art unsupervised
short-term person re-id methods on five widely-used clothes-change re-id
datasets. Experimental results verify that our approach outperforms the
unsupervised re-id competitors by a clear margin, remaining a narrow gap to the
supervised baselines
- …