Search results for: Zhe Feng

Items from 1 to 20 out of 184 results

article

Investigation on the Fatigue Crack Growth Behaviors of AISI 4340 Steel with Different Strength–Toughness Combinations

Bin Wang, Quan Wen Pan, Zi Kuan Xu, Peng Zhang, more

Advanced Engineering Materials > 26 > 6 > n/a - n/a

The strength, toughness, and fatigue crack growth (FCG) resistance of high‐strength steels are the key performance indexes concerned in the material selection of engineering components. It is considered that the FCG resistance of high‐strength steels can be optimized by simultaneous strengthening and toughening. In order to make clear whether the above view is correct or not, the strength–toughness...

article

Photoactivatable Engineering of CRISPR/Cas9‐Inducible DNAzyme Probe for In Situ Imaging of Nuclear Zinc Ions

Ran Liu, Difei Jiang, Yangfang Yun, Zhe Feng, more

Angewandte Chemie International Edition > 63 > 10 > n/a - n/a

DNAzyme‐based fluorescent probes for imaging metal ions in living cells have received much attention recently. However, employing in situ metal ions imaging within subcellular organelles, such as nucleus, remains a significant challenge. We developed a three‐stranded DNAzyme probe (TSDP) that contained a 20‐base‐pair (20‐bp) recognition site of a CRISPR/Cas9, which blocks the DNAzyme activity. When...

article

Photoactivatable Engineering of CRISPR/Cas9‐Inducible DNAzyme Probe for In Situ Imaging of Nuclear Zinc Ions

Ran Liu, Difei Jiang, Yangfang Yun, Zhe Feng, more

Angewandte Chemie > 136 > 10 > n/a - n/a

article

Investigation on the Fatigue Behaviors of Maraging Steel at Different Stress Ratios

Bin Wang, Zhong Jie Tian, Jing Yi Qin, Zi Kuan Xu, more

Advanced Engineering Materials > 25 > 19 > n/a - n/a

Herein, the high‐cycle fatigue behaviors of 18Ni maraging steel with different tensile strength in the stress ratio range from 0.1 to 0.5 are investigated, and compared with those at the stress ratio of −1. It is found that the relationship between the fatigue strength at the stress ratios of −1 and 0.1 and tensile strength is nonmonotonic, while the fatigue strength at the stress ratio of 0.5 improves...

article

Dual Nickel/Photoredox‐Catalyzed Synthesis of N‐formyl N,N’‐Diaryl Ethylenediamines via Multiple C−N/C−C Coupling of Nitroarenes with Trimethylamine

Tongtong Zheng, Zhe Feng, Jun‐An Ma, Chi Wai Cheung

Advanced Synthesis & Catalysis > 365 > 14 > 2377 - 2384

N,N’‐Diaryl ethylenediamines are common feedstocks in organic synthesis and important structural motifs in medicinal chemistry. Whereas the C−N formation reactions based on anilines and aryl halides are the most direct methods to access N,N’‐diaryl ethylenediamines, the photocatalytic synthetic version remains undeveloped. Herein we describe the dual nickel/photoredox‐catalyzed amination reaction...

article

Anti‐Quenching NIR‐II J‐Aggregates of Benzo[c]thiophene Fluorophore for Highly Efficient Bioimaging and Phototheranostics

Ka‐Wai Lee, Yijian Gao, Wei‐Chih Wei, Ji‐Hua Tan, more

Advanced Materials > 35 > 20 > n/a - n/a

Molecular fluorophores with the second near‐infrared (NIR‐II) emission hold great potential for deep‐tissue bioimaging owing to their excellent biocompatibility and high resolution. Recently, J‐aggregates are used to construct long‐wavelength NIR‐II emitters as their optical bands show remarkable red shifts upon forming water‐dispersible nano‐aggregates. However, their wide applications in the NIR‐II...

article

Preoperative Assessment of Blood Vessels and Intratumoral Microbleeds in Brain Tumors Based on a 3D Contrast‐Enhanced T₁‐Weighted Flow‐Sensitive Black‐Blood Sequence

Xin Cao, Kun Lv, Xuyang Yin, Yunxi Cao, more

Journal of Magnetic Resonance Imaging > 57 > 5 > 1543 - 1551

Background Three‐dimensional (3D) contrast‐enhanced T₁‐weighted flow‐sensitive black‐blood (CE‐T₁WI FSBB) is a newly developed black blood sequence by adding motion probing gradient pulses to gradient echo (GRE) sequences, which has important value for the preoperative assessment of tumor brain blood supply vessels and intratumoral microbleeds. Purpose To compare 3D CE‐T₁WI FSBB and 3D contrast‐enhanced...

article

A novel model for estimation of the discharge ohm internal resistance of lithium‐ion battery combining the temperature and different state‐of‐charge segments

Lin Chen, Shuxiao Wu, Zhe Feng, Bohao Liu, more

International Journal of Energy Research > 46 > 15 > 24465 - 24475

Assessment of discharge ohm internal resistance (DOR) is a critical step for the battery thermal management system. However, the influence of various variables on DOR makes it challenging to develop a reliable and dependable model. Therefore, an approach for estimating DOR that relies on single‐factor (temperature) is developed by employing cubic polynomial and exponential fitting functions. First,...

article

Thermochromic Phosphors Based on One‐Dimensional Ionic Copper‐Iodine Chains Showing Solid‐State Photoluminescence Efficiency Exceeding 99 %

Kuang‐Hui Song, Jing‐Jing Wang, Li‐Zhe Feng, Fuxiang He, more

Angewandte Chemie International Edition > 61 > 38 > n/a - n/a

Thermochromic phosphors are intriguing materials for realizing thermochromic behaviors of light‐emitting diodes. Here a highly luminescent and stable thermochromic phosphor based on one‐dimensional Cu₄I₆(4‐dimethylamino‐1‐ethylpyridinium)₂ is reported. This unique ionic copper‐iodine chain‐based hybrid exhibits near‐unity photoluminescence efficiency owing to the through‐space charge‐transfer character...

article

Thermochromic Phosphors Based on One‐Dimensional Ionic Copper‐Iodine Chains Showing Solid‐State Photoluminescence Efficiency Exceeding 99 %

Kuang‐Hui Song, Jing‐Jing Wang, Li‐Zhe Feng, Fuxiang He, more

Angewandte Chemie > 134 > 38 > n/a - n/a

article

MicroRNA‐338‐3p as a therapeutic target in cardiac fibrosis through FGFR2 suppression

Cheng Huang, Rui Wang, Jianjun Lu, Yongli He, more

Journal of Clinical Laboratory Analysis > 36 > 8 > n/a - n/a

Background The development of cardiac fibrosis involves the activation of cardiac fibroblasts (CFs) and their differentiation into myofibroblasts, which leads to the disruption of the extracellular matrix network. In the past few years, microRNAs (miRNA) have been described as potential targets for treating cardiac diseases. Although miR‐338‐3p has been shown to participate in the development of...

article

Mapping Organizational Changes of Fiber‐Like Structures in Disease Progression by Multiparametric, Quantitative Imaging (Laser Photonics Rev. 16(6)/2022)

Shuhao Qian, Jia Meng, Zhe Feng, Lingxi Zhou, more

Laser & Photonics Reviews > 16 > 6 > n/a - n/a

In Vivo Multiparametric Quantitative Imaging In article number 2100576, a multi‐parametric imaging system is established by Zhihua Ding, Jun Qian, Zhiyi Liu and colleagues to resolve subtle structural remodeling of collagen fibers and vasculature in disease progression with waviness, orientation and alignment assessments. Applications of this system includes mapping mouse cerebrovascular organization,...

article

Mapping Organizational Changes of Fiber‐Like Structures in Disease Progression by Multiparametric, Quantitative Imaging

Shuhao Qian, Jia Meng, Zhe Feng, Lingxi Zhou, more

Laser & Photonics Reviews > 16 > 6 > n/a - n/a

With the progression of diseases, modified cell–matrix interactions have major effects not only upon key cellular functions but also upon the structure of extracellular matrix and vasculature, which are two of the most prevalent fiber‐like structures in biological tissues. Unfortunately, quantitative approaches to assessing these structural changes are lacking. Herein, a multiparametric imaging system...

article

Molecular Programming of NIR‐IIb‐Emissive Semiconducting Small Molecules for In Vivo High‐Contrast Bioimaging Beyond 1500 nm

Yi Yuan, Zhe Feng, Shengliang Li, Zhongming Huang, more

Advanced Materials > 34 > 19 > n/a - n/a

Materials with long‐wavelength second near‐infrared (NIR‐II) emission are highly desired for in vivo dynamic visualizating of microstructures in deep tissues. Herein, by employing an atom‐programming strategy, a series of highly fluorescent semiconducting oligomers (SOMs) with tunable NIR‐IIb emissions are developed for bioimaging applications. After self‐assembly into nanoparticles (NPs), they show...

article

Biologically Excretable Aggregation‐Induced Emission Dots for Visualizing Through the Marmosets Intravitally: Horizons in Future Clinical Nanomedicine

Zhe Feng, Siyi Bai, Ji Qi, Chaowei Sun, more

Advanced Materials > 33 > 17 > n/a - n/a

Superb reliability and biocompatibility equip aggregation‐induced emission (AIE) dots with tremendous potential for fluorescence bioimaging. However, there is still a chronic lack of design instructions of excretable and bright AIE emitters. Here, a kind of PEGylated AIE (OTPA‐BBT) dots with strong absorption and extremely high second near‐infrared region (NIR‐II) PLQY of 13.6% is designed, and a...

article

Frontispiece: Remote Fluorination and Fluoroalkyl(thiol)ation Reactions

Fa‐Guang Zhang, Xue‐Qi Wang, Yin Zhou, Hong‐Song Shi, more

Chemistry – A European Journal > 26 > 67 > n/a - n/a

Remote functionalization reactions have the power to transform a C−H (or C−C) bond at a distant position from a functional group. In the past few years, this strategy started to be practiced for the construction of versatile organofluorine compounds, such as remote fluorination, trifluoromethylation, difluoromethylation, trifluoromethylthiolation, and fluoroalkenation reactions. In this context, this...

article

Remote Fluorination and Fluoroalkyl(thiol)ation Reactions

Fa‐Guang Zhang, Xue‐Qi Wang, Yin Zhou, Hong‐Song Shi, more

Chemistry – A European Journal > 26 > 67 > 15378 - 15396

Remote functionalization reactions have the power to transform a C−H (or C−C) bond at a distant position from a functional group. This Review summarizes recent advances and key breakthroughs in remote fluorination, trifluoromethylation, difluoromethylation, trifluoromethylthiolation, and fluoroalkenylation reactions. Several powerful strategies have emerged to control the reactivity and distal selectivity...

article

Torsional Fatigue Cracking and Fracture Behaviors of Cold-Drawn Copper: Effects of Microstructure and Axial Stress

Rong-Hua Li, Peng Zhang, Zhe-Feng Zhang

Acta Metallurgica Sinica (English Letters) > 2019 > 32 > 12 > 1521-1529

The fatigue cracking and fracture behavior of cold-drawn copper subjected to cyclic torsional loading were investigated in this study. It was found that with increasing stress amplitude, the fracture mode of cold-drawn copper gradually changes from a shear fracture on transverse maximum shear stress plane to a mixed shear mode on both transverse and longitudinal shear planes and finally turns to the...

article

Progress in synthesis and application of zwitterionic Gemini surfactants

Yuqiao Cheng, Yang Yang, Chunrong Niu, Zhe Feng, more

Frontiers of Materials Science > 2019 > 13 > 3 > 242-257

Zwitterionic Gemini surfactants have the Gemini molecular structure in which there are both multiple lipophilic groups and multiple hydrophilic groups. However, their hydrophilic groups have different charges. Due to the special molecular structure, this kind of surfactants possesses excellent properties, including high surface activities, isoelectric point (IP), low critical micelle concentration...

article

New method for determining P‐S‐N curves in terms of equivalent fatigue lives

Xin Bai, Peng Zhang, Zhen‐jun Zhang, Rui Liu, more

Fatigue & Fracture of Engineering Materials & Structures > 42 > 10 > 2340 - 2353

A new method for determining the P‐S‐N curves is proposed by the probabilistic analysis of the mixed samples that are composed of the testing fatigue lives and equivalent fatigue lives. The equivalent fatigue lives at each level are converted from all the testing data at all the testing levels according to the equivalent fatigue failure probability, where the life distributions are determined by the...

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INFONA - science communication portal

Search results for: Zhe Feng

Investigation on the Fatigue Crack Growth Behaviors of AISI 4340 Steel with Different Strength–Toughness Combinations

Photoactivatable Engineering of CRISPR/Cas9‐Inducible DNAzyme Probe for In Situ Imaging of Nuclear Zinc Ions

Photoactivatable Engineering of CRISPR/Cas9‐Inducible DNAzyme Probe for In Situ Imaging of Nuclear Zinc Ions

Investigation on the Fatigue Behaviors of Maraging Steel at Different Stress Ratios

Dual Nickel/Photoredox‐Catalyzed Synthesis of N‐formyl N,N’‐Diaryl Ethylenediamines via Multiple C−N/C−C Coupling of Nitroarenes with Trimethylamine

Anti‐Quenching NIR‐II J‐Aggregates of Benzo[c]thiophene Fluorophore for Highly Efficient Bioimaging and Phototheranostics

Preoperative Assessment of Blood Vessels and Intratumoral Microbleeds in Brain Tumors Based on a 3D Contrast‐Enhanced T₁‐Weighted Flow‐Sensitive Black‐Blood Sequence

A novel model for estimation of the discharge ohm internal resistance of lithium‐ion battery combining the temperature and different state‐of‐charge segments

Thermochromic Phosphors Based on One‐Dimensional Ionic Copper‐Iodine Chains Showing Solid‐State Photoluminescence Efficiency Exceeding 99 %

Thermochromic Phosphors Based on One‐Dimensional Ionic Copper‐Iodine Chains Showing Solid‐State Photoluminescence Efficiency Exceeding 99 %

MicroRNA‐338‐3p as a therapeutic target in cardiac fibrosis through FGFR2 suppression

Mapping Organizational Changes of Fiber‐Like Structures in Disease Progression by Multiparametric, Quantitative Imaging (Laser Photonics Rev. 16(6)/2022)

Mapping Organizational Changes of Fiber‐Like Structures in Disease Progression by Multiparametric, Quantitative Imaging

Molecular Programming of NIR‐IIb‐Emissive Semiconducting Small Molecules for In Vivo High‐Contrast Bioimaging Beyond 1500 nm

Biologically Excretable Aggregation‐Induced Emission Dots for Visualizing Through the Marmosets Intravitally: Horizons in Future Clinical Nanomedicine

Frontispiece: Remote Fluorination and Fluoroalkyl(thiol)ation Reactions

Remote Fluorination and Fluoroalkyl(thiol)ation Reactions

Torsional Fatigue Cracking and Fracture Behaviors of Cold-Drawn Copper: Effects of Microstructure and Axial Stress

Progress in synthesis and application of zwitterionic Gemini surfactants

New method for determining P‐S‐N curves in terms of equivalent fatigue lives

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