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Novel disulfide-containing diols: synthesis and application in self-healing fluorescent polyurethane elastomers

NEW JOURNAL OF CHEMISTRY 2024年第21期48卷 9756-9767页

作者： Luo, Jialu Liu, Jin Li, Zhen Wei, Xiaoyan Wang, Shiwu Tang, Jinyang Zhang, Yajie Wang, Ping Wang, Di Hu, Xianhai Wang, Xianbiao Anhui Jianzhu Univ Sch Mat Sci & Chem Engn Hefei 230601 Peoples R China Anhui Jianzhu Univ Anhui Key Lab Adv Bldg Mat Hefei 230601 Peoples R China

The synthesis of polyurethane elastomers with repair abilities and robust mechanical properties under mild conditions remain a great challenge. Numerous studies have shown that dynamic disulfide bonds are the important chemical chain unit of polyurethane with self-healing properties. Therefore, the synthesis of diols containing a disulfide bond chain unit is the key for achieving polyurethane with self-healing properties. In this study, three kinds of hydroxyl-capping diol fluorescent molecules containing disulfide were synthesized from 2,2 '-dithiobisbenzoic acid (DTSA) with glycol (EG), 1,4-butanediol (BDO) or 1,6-hexanediol (HDO) via esterification. The structures and properties of the synthesized aromatic disulfide diol and the derived disulfide-containing self-healing fluorescent polyurethane (SFPU) were characterized using proton nuclear magnetic resonance (1H NMR and 13C NMR) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), small-angle X-ray scattering (SAXS), dynamic mechanical analysis (DMA), and other techniques. The results demonstrated the successful synthesis of diols containing aromatic disulfide bonds. The self-healing rate of polyurethane elastomers, with aromatic disulfide diols introduced as hard segments, was approximately 61.50% at 20 degrees C. Polyurethane elastomers exhibited excellent mechanical properties and demonstrated fluorescence. These novel self-healing fluorescent polyurethane elastomers can be widely used in industries such as building, clothing, furniture, medical materials, armaments, and packaging. This research study will have some guiding significance in expanding the application of self-healing fluorescent polyurethane. 2,2 '-Dithiodibenzoic acid ester diol was introduced into the polyurethane main chain in different ways, resulting in polyurethane elastomers that exhibited self-healing capability, fluorescence performance and robust mechanical pro

关键词： Sulfur compounds

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New perspective crosslinking electrochemistry and other research fields: beyond electrochemical reactors

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CHEMICAL SCIENCE 2024年第18期15卷 6608-6621页

作者： Zhang, Yu Wu, Yuen Univ Sci & Technol China Sch Chem & Mat Sci Hefei 230026 Peoples R China

Over the years, electrochemical reactors have evolved significantly, with modern reactors now able to achieve a high current density and power output in compact sizes. This leap in performance has not only greatly accelerated the rate of electrochemical reactions but also had a broader impact on the environment. Traditional research perspectives, focused primarily on the internal working systems of reactors, possibly overlook the potential of electrochemical systems in regulating their surrounding environment. A novel research perspective considering the interaction between electrochemical processes and their environmental context as a unified subject of study has gradually emerged alongside the dramatic development of electrochemical techniques. This viewpoint introduces a paradigm shift: electrochemical reactors are not isolated entities but rather are integral parts that interact with their surroundings. Correspondingly, this calls for an innovative research methodology that goes beyond studying the electrochemical processes in isolation. Rather, it integrates the design of the electrochemical system with its specific application environment, ensuring seamless integration for optimal performance under various practical conditions. Therefore, performance metrics should include not only the basic parameters of the electrochemical reactions but also the adaptability of the electrochemical system in real-world scenarios beyond the laboratory. By focusing on environmental integration and application-driven design, the applications of electrochemical technology can be more effectively leveraged. This perspective is exemplified by an electrochemical system based on coupled cathodic oxygen reduction and anodic oxygen evolution reactions. By adopting this new research paradigm, the applications of this electrochemical system can be extended to fields like medical treatment, food science, and microbial fermentation, with an emphasis on tailored designs for these specific a

关键词： Electrochemistry

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Active control of polarization state in terahertz metalens

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OPTICS COMMUNICATIONS 2025年 583卷

作者： He, Hongchuan Zhang, Yiqian Wang, Yangkai Cheng, Hao Liu, Zheng Dai, Guangbin Wang, Chengyue Huang, Qiuping Lu, Yalin Univ Sci & Technol China Dept Mat Sci & Engn Hefei 230026 Peoples R China Univ Sci & Technol China Hefei Natl Res Ctr Phys Sci Microscale Anhui Lab Adv Photon Sci & Technol Hefei 230026 Peoples R China

Metalens shows unprecendented capability in manipulating the propagation of electromagnetic wave, and has much more potential in light focusing, imaging, etc. than the conventional bulky lens. However, since the light refraction of metalens is caused by the phase discontinuity over the spatial phase responses, numerous efforts should be devoted into the design of every metastructure to meet the phase demand, which makes it challenging to achieve tunable metalenses. Here, we propose several terahertz (THz) metalenses with polarization states continuously tunable at their focal points as the external optical pump varies. Every metastructure of these metalenses contains two hybrid circular split ring resonators (CSRRs) composed of Si and Au, respectively. It is shown that the electromagnetic response of the hybrid CSRRs can be split into two orthogonal PancharatnamBerry phase modes, which are controlled by the rotation angles of Si and Au-CSRRs. Under this theory, THz metalenses with single or multiple reconfigurable linear polarized (LP) focal points are designed and simulated. By varying the Si conductivity, the polarization angle of LP THz wave at the focal point can continuously rotate from the initial angle to the designed one. Our design of metalens paves a new way for tunable metasurfaces.

关键词： Terahertz metalens Metasurface Active control Polarization state Tunable focal points Circular split ring resonators

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Age-invariant face recognition based on identity-age shared features

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VISUAL COMPUTER 2024年第8期40卷 5465-5474页

作者： Zhang, Zikang Yin, Songfeng Cao, Liangcai Tsinghua Univ Hefei Inst Publ Safety Res Hefei 230601 Peoples R China Tsinghua Univ Dept Precis Instruments Beijing 100084 Peoples R China

Decoupling the mixed face features to obtain identity features that are not disturbed by age information is the key to achieving cross-age face recognition. Established mainstream identity feature extraction methods decouple facial representations into two components: age-related features and identity-related features, ignoring the fact that some identity-age shared features (ISF) exist, resulting in incomplete extracted identity features and limiting the further improvement of cross-age identity recognition accuracy. We redefine the component of facial representations and propose to introduce identity-age shared features to complement identity features. Specifically, the mixed face features are decoupled into pure age features, pure identity features, and identity-age shared features. The pure identity features and identity-age shared features are coupled to obtain the complete identity features. In addition, a two-stage constraint algorithm is developed to reduce the interference of age-related information on identity recognition and to enhance the independence between identity and age features. Experimental results on benchmark datasets for face aging (FG-NET, AGE-DB30, CALFW and CACD-VS) show that the proposed ISF outperforms state-of-the-art AIFR approaches, including DAL and MTLFace.

关键词： Face recognition Cross-age Deep learning Correlation analysis

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Band gap engineering and magnetic behavior in Cd doped BaTiO3 with and without Ba-vacancy based on first-principles

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SOLID STATE COMMUNICATIONS 2025年 397卷

作者： Hu, Weibo Wang, Yueqin Chen, Ren Cao, Huan Liu, Yin Anhui Univ Sci & Technol Sch Mech & Optoelect Phys Huainan 232001 Peoples R China Anhui Univ Sci & Technol Sch Mat Sci & Engn Huainan 232001 Peoples R China Anhui Univ Sci & Technol Anhui Int Joint Res Ctr Nano Carbon Based Mat & En Huainan 232001 Peoples R China

The effects of different Cd doping concentrations on the electronic structures and magnetic properties of BaTiO3 with and without Ba vacancy (VBa) have been studied by using the spin-polarized first-principles calculations. The calculated results show that cubic BaTiO3, Ba0.875Cd0.125TiO3 and Ba0.75Cd0.25TiO3 without VBa are 1.743, 1.781, and 1.818 eV, respectively, demonstrating that the band gaps gradually increase with the increase of the Cd doping concentration. This anti-doping behavior is desired for band gap modulation and resistance switching. The Ba1-xCdxTiO3 (x = 0, 0.125, 0.25) with VBa generate novel acquired ferromagnetism due to the transition of structural phase and contraction of lattice. The total magnetic moments of Ba1-xCdxTiO3 (x = 0, 0.125, 0.25) with VBa are 2.05 mu B, 1.99 mu B, and 1.96 mu B, respectively, which decreases with the increasing of Cd doping concentration. The decrease in total magnetic moment (magnetic moment quenching) originates from the small changes in magnetic moments of O and Ti atoms, which attributes to the weakened p-d hybridization between O and Ti atoms. The Ba1-xCdxTiO3 material can be used in the fields such as magnetic storage materials and spintronics, which is of great significance for the development of new electronic devices.

关键词： Cd doping concentration Electronic structures Magnetic properties Ba vacancies First-principles calculations

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MicroRNA-29b-3p reduces cisplatin resistance in non-small cell lung cancer by targeting myeloid cell leukemia-1

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MOLECULAR & CELLULAR TOXICOLOGY 2025年第1期21卷 205-215页

作者： Cheng, Yuanjun Chen, Bin Dong, Xuxiao Shu, Jian Yao, Jie Peoples Hosp Chizhou Dept Cardiothorac Surg 3 Baiya Rd Chizhou 247000 Peoples R China First Peoples Hosp Taicang Dept Cardiothorac Surg Suzhou 215400 Peoples R China

IntroductionNon-small cell lung cancer (NSCLC) is a heterogeneous series of tumors. Given the implication of microRNA-29b-3p (miR-29b-3p) in cisplatin resistance in NSCLC, this study expounded on the further ***549 cells and cisplatin-resistant cells A549/DDP were selected. A549/DDP cells were manipulated with miR-29b-3p mimics/MCL-1 siRNA. miR-29b-3p and MCL levels were assessed. Cell sensitivity to cisplatin of different concentrations was examined by CCK-8. A549/DDP cell apoptosis under 10 mu M cisplatin treatment was tested by flow cytometry. The targeted relationship between miR-29b-3p and MCL-1 was analyzed by TargetScan database and dual-luciferase assay. miR-29b-3p and MCL-1 were overexpressed to study whether miR-29b-3p regulated A549/DDP cell drug resistance by targeting MCL-1. To verify the effect of miR-29b-3p on DDP sensitivity in vivo, nude mice were subcutaneously injected with A549/DDP cells carrying the miR-29b-3p overexpressing lentiviral vector or the corresponding control vector to establish the nude mouse xenograft tumor model, and after 3 weeks, injected with DDP via tail vein for 2 ***-29b-3p level in A549/DDP cells was diminished and MCL-1 expression was raised. miR-29b-3p overexpression or MCL-1 silencing enhanced A549/DDP cell sensitivity to cisplatin by promoting apoptosis. miR-29b-3p targeted MCL-1. MCL-1 overexpression partially averted miR-29b-3p overexpression-promoted cisplatin sensitivity and apoptosis. Tumor volume/weight/MCL-1 level in the A549/DDP/miR mimics + DDP group were reduced, and miR-29b-3p was up-regulated versus the A549/DDP/mimics NC + DDP group. Overexpression of miR-29b-3p induced apoptosis in tumor tissues of NSCLC ***-29b-3p targeted MCL-1, thus promoting apoptosis and enhancing A549/DDP cell sensitivity to cisplatin.

关键词： Non-small cell lung cancer Cisplatin Drug resistance miR-29b-3p MCL-1 A549 Apoptosis Proliferation

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Preparation of Bronze (CuSn10) Parts by Material Extrusion Process Using Paraffin-Based Binder

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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 2025年第6期34卷 5155-5166页

作者： Jin, Kai Li, Gemin Wei, Bangzheng Chen, Ruizhi Chen, Pengqi Cheng, Jigui Hefei Univ Technol Sch Mat Sci & Engn Hefei 230009 Peoples R China Res Ctr Powder Met Engn & Technol Anhui Prov Hefei 230009 Peoples R China Minist Educ Engn Res Ctr High Performance Copper Alloy Mat & P Hefei 230009 Peoples R China

In this study, bronze (CuSn10) feedstocks were prepared using paraffin-based binders, which were extrusion printed to obtain green parts, and bronze samples were obtained by debinding and sintering the green parts. The influence of powder loading capacity, printing temperature, and sintering temperature on the microstructure and properties of the obtained bronze samples were investigated. The results show that the obtained green bronze parts with 55% powder loading capacity printed at 160 degrees C have the highest density of 5.11 g/cm3. After debinding, the samples were sintered at 840 degrees C for 90 min in H2 atmosphere, showing the highest relative density (97.97 +/- 1.05%) and hardness (65.6 +/- 0.5 HB), which were comparable to bronze samples prepared by the pressing and sintering process using the same raw materials. And the maximum tensile strength and flexural strength of the printed bronze products are 286.5 +/- 2.1 MPa and 313.6 +/- 1.5 MPa. The present work has shown that bronze samples with complex shapes, high precision, and fewer defects can be successfully prepared by the material extrusion process under the optimum parameters.

关键词： CuSn10 density material extrusion powder loading capacity printing temperature

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Glucose metabolism in glioma: an emerging sight with ncRNAs

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CANCER CELL INTERNATIONAL 2024年第1期24卷 316页

作者： Rong, Jun Wang, Qifu Li, Tingzheng Qian, Jin Cheng, Jinchao Wannan Med Coll Xuancheng Peoples Hosp Affiliated Xuancheng Hosp Dept Neurosurg Xuancheng Peoples R China Wannan Med Coll Yijishan Hosp Affiliated Hosp 1 Dept Neurosurg Wuhu Peoples R China Xuancheng Cent Hosp Dept Neurosurg Xuancheng Peoples R China

Glioma is a primary brain tumor that grows quickly, has an unfavorable prognosis, and can spread intracerebrally. Glioma cells rely on glucose as the major energy source, and glycolysis plays a critical role in tumorigenesis and progression. Substrate utilization shifts throughout glioma progression to facilitate energy generation and biomass accumulation. This metabolic reprogramming promotes glioma cell proliferation and metastasis and ultimately decreases the efficacy of conventional treatments. Non-coding RNAs (ncRNAs) are involved in several glucose metabolism pathways during tumor initiation and progression. These RNAs influence cell viability and glucose metabolism by modulating the expression of key genes of the glycolytic pathway. They can directly or indirectly affect glycolysis in glioma cells by influencing the transcription and post-transcriptional regulation of oncogenes and suppressor genes. In this review, we discussed the role of ncRNAs in the metabolic reprogramming of glioma cells and tumor microenvironments and their abnormal expression in the glucometabolic pathway in glioma. In addition, we consolidated the existing theoretical knowledge to facilitate the use of this emerging class of biomarkers as biological indicators and potential therapeutic targets for glioma.

关键词： Glycolysis Warburg effect Glioma ncRNAs

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Experimental study of dual-source heat pump coupled with water-cooled photovoltaic/thermal system

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APPLIED THERMAL ENGINEERING 2025年 258卷

作者： Zhang, Lei He, Wei Zhu, Jian Liu, Xianghua Hu, Zhongting Yang, Chengguo Meng, Qingda Wang, Shu Li, Mingyong Zhang, Xing Zhang, Chenyu Hefei Univ Technol Dept Bldg Environm & Equipment Hefei 230009 Peoples R China State Grid Corp China Beijing 100000 Peoples R China State Grid Jiangsu Elect Power Co Ltd Nanjing 210000 Peoples R China State Grid Jiangsu Elect Power Co Ltd Elect Power Res Inst Nanjing 210000 Peoples R China

This paper presents a study on an innovative solar-air dual heat source heat pump coupled with a water-cooled photovoltaic/thermal system. The research investigated the real-time operation of solar electrical and thermal efficiency, as well as the coefficient of performance Field experimental platform construction and experimental testing were conducted. The experimental results show that when running the system in composite mode, the average electrical efficiency in the two phases was 16.79% and 18.33%, while the average collector efficiency reached 42.72% and 98.94%, respectively. Under typical autumn working conditions, the heat pump's coefficient of performance with the fans off and on was 4.37 and 4.73 respectively on sunny days, and under cloudy day conditions, it reached 3.76 and 4.20 respectively. With the fans on, the average collector efficiency on a cloudy day increased by 3.34% compared with that without the fans, and the total average collector efficiency reached 310.5%. Compared with conventional single water-cooled photovoltaic/thermal systems or solarassisted heat pump systems, the combination of these two systems, with the addition of both fins and fans which increased the heat transfer performance of the system and improved the stability and economy of the system's operation, providing data to support the feasibility of a water-cooled photovoltaic/thermal coupled dual-source heat pump system.

关键词： Photovoltaic thermal Water heating Dual heat source Heat pump Forced convection

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Effect of duloxetine on changes in serum proinflammatory cytokine levels in patients with major depressive disorder

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BMC PSYCHIATRY 2024年第1期24卷 1-9页

作者： Gao, Wenfan Gao, Yejun Xu, Yayun Liang, Jun Sun, Yanhong Zhang, Yuanyuan Shan, Feng Ge, Jinfang Xia, Qingrong Anhui Med Univ Affiliated Psychol Hosp Hefei Peoples R China Hefei Fourth Peoples Hosp Dept Pharm Hefei Peoples R China Anhui Mental Hlth Ctr Psychopharmacol Res Lab Hefei Peoples R China Anhui Clin Res Ctr Mental Disorders Hefei Peoples R China Anhui Med Univ Anhui Inst Innovat Drugs Inflammat & Immune Mediated Dis Lab Anhui Prov Hefei Peoples R China Minist Educ Key Lab Antiinflammatory & Immune Med Hefei Peoples R China Anhui Med Univ Sch Pharm 81 Meishan Rd Hefei 230000 Peoples R China Anhui Med Univ Affiliated Psychol Hosp Dept Sci & Educ Hefei Peoples R China

Objective Accumulating evidence supports the idea that inflammation may contribute to the pathophysiology of major depressive disorder (MDD). Duloxetine, a serotonin-norepinephrine reuptake inhibitor, exhibits anti-inflammatory effects both in vitro and in vivo. In this study, we investigated the impact of duloxetine on changes in serum proinflammatory cytokine levels among individuals diagnosed with MDD. Methods A cohort of 23 drug-na & iuml;ve individuals diagnosed with MDD and 23 healthy controls were included in this study. The severity of depressive symptoms was evaluated using the 24-item Hamilton Depression Scale (HAMD-24). A panel of 7 proinflammatory cytokines, including interleukin-1 beta (IL-1 beta), IL-2, IL-6, IL-8, IL-12, tumor necrosis factor-alpha (TNF-alpha), and interferon-gamma (IFN-gamma), were quantified using multiplex Luminex assays. The levels of serum cytokines in healthy controls and patients with MDD were compared at baseline. All patients received duloxetine at a dosage range of 40-60 mg/day for a duration of 4 weeks. The HAMD-24 scores and serum cytokine levels were compared before and after duloxetine treatment. Results Compared with healthy controls, patients with MDD had significantly greater levels of IL-2, IL-6, IL-8, IL-12, TNF-alpha, and IFN-gamma (P < 0.05). Moreover, there was a significant decrease in HAMD-24 scores observed pre- and post-treatment (t = 13.161, P < 0.001). Furthermore, after 4 weeks of treatment, the serum levels of IL-8 (t = 3.605, P = 0.002), IL-12 (t = 2.559, P = 0.018), and IFN-gamma (t = 3.567, P = 0.002) decreased significantly. However, there were no significant differences in other cytokines, including IL-1 beta, IL-2, IL-6, and TNF-alpha, before and after treatment (P > 0.05). Conclusions These findings present compelling evidence, potentially for the first time, indicating that duloxetine treatment may effectively reduce the serum concentrations of IL-8, IL-12, and IFN-gamma in individuals diagnosed w

关键词： Pro-inflammatory cytokines Serum Duloxetine Major depressive disorder Patients

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