Advanced search    

Search: authors:"Yifan Wang"

37 papers found.
Use AND, OR, NOT, +word, -word, "long phrase", (parentheses) to fine-tune your search.

Adaptive evolution and divergent expression of heat stress transcription factors in grasses

Background Heat stress transcription factors (Hsfs) regulate gene expression in response to heat and many other environmental stresses in plants. Understanding the adaptive evolution of Hsf genes in the grass family will provide potentially useful information for the genetic improvement of modern crops to handle increasing global temperatures. Results In this work, we performed a...

Evolution of land plant genes encoding L-Ala-D/L-Glu epimerases (AEEs) via horizontal gene transfer and positive selection

Background The L-Ala-D/L-Glu epimerases (AEEs), a subgroup of the enolase superfamily, catalyze the epimerization of L-Ala-D/L-Glu and other dipeptides in bacteria and contribute to the metabolism of the murein peptide of peptidoglycan. Although lacking in peptidoglycan, land plants possess AEE genes that show high similarity to those in bacteria. Results Similarity searches...

Doxorubicin and anti-VEGF siRNA co-delivery via nano-graphene oxide for enhanced cancer therapy in vitro and in vivo

Doxorubicin and anti-VEGF siRNA co-delivery via nano-graphene oxide for enhanced cancer therapy in vitro and in vivo Qi Sun,1–3 Xiaoli Wang,1–3 Chunying Cui,1–3 Jing Li,1–3 Yifan Wang1–3 1Department of Pharmaceutics, School of Pharmaceutical Sciences, Capital Medical University, Beijing, China; 2Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Beijing, China...

Doxorubicin-loaded redox-responsive micelles based on dextran and indomethacin for resistant breast cancer

Doxorubicin-loaded redox-responsive micelles based on dextran and indomethacin for resistant breast cancer Yunfang Zhou,1,* Shuanghu Wang,1,* Xuhua Ying,2 Yifan Wang,2 Peiwu Geng,1 Aiping Deng,3

Growing Slowly 1 locus encodes a PLS-type PPR protein required for RNA editing and plant development in Arabidopsis

Most pentatricopeptide repeat (PPR) proteins are involved in organelle post-transcriptional processes, including RNA editing. The PPR proteins include the PLS subfamily, containing characteristic triplets of P, L, and S motifs; however, their editing mechanisms and roles in developmental processes are not fully understood. In this study, we isolated the Arabidopsis thaliana...

Comments on the twisted punctures of Aeven class S theory

Abstract We point out that the USp symmetry associated to a full twisted puncture of a class S theory of type Aeven has the global anomaly associated to π4(USp) = ℤ2. We discuss manifestations of this fact in the context of the superconformal field theory R2,2N introduced by Chacaltana, Distler and Trimm. For example, we find that this theory can be thought of as a natural...

Romans supergravity from five-dimensional holograms

Abstract We study five-dimensional superconformal field theories and their holographic dual, matter-coupled Romans supergravity. On the one hand, some recently derived formulae allow us to extract the central charges from deformations of the supersymmetric five-sphere partition function, whose large N expansion can be computed using matrix model techniques. On the other hand, the...

(2, 2) superconformal bootstrap in two dimensions

We find a simple relation between two-dimensional BPS \( \mathcal{N}=2 \) superconformal blocks and bosonic Virasoro conformal blocks, which allows us to analyze the crossing equations for BPS 4-point functions in unitary (2, 2) superconformal theories numerically with semidefinite programming. We constrain gaps in the non-BPS spectrum through the operator product expansion of...

\( \mathcal{N} \) = 4 superconformal bootstrap of the K3 CFT

We study two-dimensional (4, 4) superconformal field theories of central charge c = 6, corresponding to nonlinear sigma models on K3 surfaces, using the superconformal bootstrap. This is made possible through a surprising relation between the BPS \( \mathcal{N} \) = 4 superconformal blocks with c = 6 and bosonic Virasoro conformal blocks with c = 28, and an exact result on the...

Deformations with maximal supersymmetries part 2: off-shell formulation

Continuing our exploration of maximally supersymmetric gauge theories (MSYM) deformed by higher dimensional operators, in this paper we consider an off-shell approach based on pure spinor superspace and focus on constructing supersymmetric deformations beyond the first order. In particular, we give a construction of the Batalin-Vilkovisky action of an all-order non-Abelian Born...

Supersymmetry Constraints and String Theory on K3

AbstractWe study supervertices in six dimensional (2, 0) supergravity theories, and derive supersymmetry non-renormalization conditions on the 4- and 6-derivative four-point couplings of tensor multiplets. As an application, we obtain exact non-perturbative results of such effective couplings in type IIB string theory compactified on K3 surface, extending previous work on type II...

Interpolating the Coulomb phase of little string theory

Abstract We study up to 8-derivative terms in the Coulomb branch effective action of (1, 1) little string theory, by collecting results of 4-gluon scattering amplitudes from both perturbative 6D super-Yang-Mills theory up to 4-loop order, and tree-level double scaled little string theory (DSLST). In previous work we have matched the 6-derivative term from the 6D gauge theory to...

A low temperature expansion for matrix quantum mechanics

We analyze solutions to loop-truncated Schwinger-Dyson equations in massless \( \mathcal{N}=2 \) and \( \mathcal{N}=4 \) Wess-Zumino matrix quantum mechanics at finite temperature, where conventional perturbation theory breaks down due to IR divergences. We find a rather intricate low temperature expansion that involves fractional power scaling in the temperature, based on a...

Little string amplitudes (and the unreasonable effectiveness of 6D SYM)

We study tree level scattering amplitudes of four massless states in the double scaled little string theory, and compare them to perturbative loop amplitudes in six-dimensional super-Yang-Mills theory. The little string amplitudes are computed from correlators in the cigar coset CFT and in \( \mathcal{N} \) = 2 minimal models. The results are expressed in terms of integrals of...

Solid-State Nanopore-Based DNA Sequencing Technology

The solid-state nanopore-based DNA sequencing technology is becoming more and more attractive for its brand new future in gene detection field. The challenges that need to be addressed are diverse: the effective methods to detect base-specific signatures, the control of the nanopore’s size and surface properties, and the modulation of translocation velocity and behavior of the...

Research of a New 6-Dof Force Feedback Hand Controller System

The field of teleoperation with force telepresence has expanded its scope to include manipulation at different scales and in virtual worlds, and the key component of which is force feedback hand controller. This paper presents a novel force feedback hand controller system, including a 3-dof translational and 3-dof rotational hand controllers, respectively, to implement position...

Hierarchical Task Planning for Multiarm Robot with Multiconstraint

Telecommunications, No. 10, Xitucheng Road, Haidian District, Beijing 100876, China Received 25 March 2016; Revised 12 July 2016; Accepted 27 July 2016 Academic Editor: Francisco Gordillo Copyright © 2016 Yifan ... Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original

Hierarchical Task Planning for Multiarm Robot with Multiconstraint

Telecommunications, No. 10, Xitucheng Road, Haidian District, Beijing 100876, China Received 25 March 2016; Revised 12 July 2016; Accepted 27 July 2016 Academic Editor: Francisco Gordillo Copyright © 2016 Yifan ... Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original

Research on Construction Method of Operational Reliability Control Model for Space Manipulator Based on Particle Filter

The operational reliability of the space manipulator is closely related to the control method. However the existing control methods seldom consider the operational reliability from the system level. A method to construct the operational reliability system control model based on particle filter for the space manipulator is presented in this paper. Firstly, the definition of...