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Study of 0.9Al_2O_3–0.1TiO_2 ceramics prepared by a novel DCC-HVCI method

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Journal of Advanced Ceramics 2018年第2期7卷 152-159页

作者： Jia-Min WU Huan XIAO meng-yue liu Ying CHEN Yi-Xin MA Li-Jin CHENG Yu-Sheng SHI State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology

In this paper, in-situ coagulation of 0.9Al_2O_3–0.1TiO_2 suspension and microwave dielectric properties of 0.9Al_2O_3–0.1TiO_2 ceramics prepared by a novel direct coagulation casting via high valence counter ions(DCC-HVCI) method were proposed. The 0.9Al_2O_3–0.1TiO_2 suspension could be coagulated via controlled release of calcium ions from calcium iodate at an elevated temperature. The influence of tri-ammonium citrate(TAC) content, solid loading, and calcium iodate content on the rheological properties of the suspension was investigated. In addition, the influence of coagulation temperature on coagulation time and properties of green bodies was also studied. It was found that the stable 0.9Al_2O_3–0.1TiO_2 suspension could be successfully prepared by adding 0.3 wt% TAC and adjusting pH value to 10–12 at room temperature. 0.9Al_2O_3–0.1TiO_2 green bodies with uniform microstructures were coagulated by adding 8.0 g/L calcium iodate after treating at 70 ℃ for 1 h. 0.9Al_2O_3–0.1TiO_2 ceramics, sintered at 1500 ℃ for 4 h and annealed at 1100 ℃ for 5 h, showed uniform microstructures with density of 3.62±0.02 g/cm^3. The microwave dielectric properties of 0.9Al_2O_3–0.1TiO_2 ceramics prepared by DCC-HVCI method were: ε_r = 11.26±0.06, Q×f = 11569± 629 GHz, τ_t = 0.93±0.60 ppm/℃. The DCC-HVCI method is a novel and promising route without binder removal process to prepare complex-shaped microwave dielectric ceramics with uniform microstructures and good microwave dielectric properties.

关键词： rheological properties microwave dielectric properties 0.9Al2O3–0.1TiO2 DCC-HVCI

Highly Porous Yet Transparent Mechanically Flexible Aerogels Realizing Solar-Thermal Regulatory Cooling

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Nano-Micro Letters 2024年第7期16卷 231-243页

作者： meng Lian Wei Ding Song liu Yufeng Wang Tianyi Zhu yue-EMiao Chao Zhang Tianxi liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122People’s Republic of China

The demand for highly porous yet transparent aerogels with mechanical flexibility and solar-thermal dual-regulation for energy-saving windows is significant but ***,a delaminated aerogel film(DAF)is fabricated through filtration-induced delaminated gelation and ambient *** delaminated gelation process involves the assembly of fluorinated cellulose nanofiber(FCNF)at the solid-liquid interface between the filter and the filtrate during filtration,resulting in the formation of lamellar FCNF hydrogels with strong intra-plane and weak interlayer hydrogen *** exchanging the solvents from water to hexane,the hydrogen bonding in the FCNF hydrogel is further enhanced,enabling the formation of the DAF with intra-layer mesopores upon ambient *** resulting aerogel film is lightweight and ultra-flexible,which pos-sesses desirable properties of high visible-light transmittance(91.0%),low thermal conductivity(33 mW m^(-1) K^(-1)),and high atmospheric-window emissivity(90.1%).Furthermore,the DAF exhibits reduced surface energy and exceptional hydrophobicity due to the presence of fluorine-containing groups,enhancing its durability and UV ***,the DAF has demonstrated its potential as solar-thermal regulatory cooling window materials capable of simultaneously providing indoor lighting,thermal insulation,and daytime radiative cooling under direct ***,the enclosed space protected by the DAF exhibits a temperature reduction of 2.6℃ compared to that shielded by conventional architectural glass.

关键词： Transparent aerogel Cellulose nanofiber aerogel Delaminated gelation Thermal insulation Passive daytime radiative cooling

Highly Red Emissive Conjugated Homopolymers Based on Double B←N Bridged Bipyridine Unit

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Chinese Journal of Polymer Science 2024年第8期42卷 1029-1037页

作者： Yu-yue Gao Kai-Yuan Zhang Shu-meng Wang Hui Tong Jun liu State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Conjugated homopolymers based on six-member rings,e.g.,polyfluorene,always exhibit blue emission and conjugated homopolymers based on five-member rings,e.g.,polythiophene,can give red emission with low *** this work,we report a series of new conjugated homopolymers based on six-member rings with high-efficiency deep-red *** repeating units of the red light emitting homopolymers are double B←N bridged bipyridine(BNBP)with the boron atoms functionalized with diphenyl,borafluorene,and 2,7-di-tert-butyl-borafluorene groups,*** relationship between the chemical structures and the opto-electronic properties of the monomers and the homopolymers has been systematically *** three polymers emit pure red light(λ_(max)=656 nm)or deep red light(λ_(max)=693 nm)with fluorescence quantum efficiency in solution higher than 60%.The polymers can be used as the emitters in solution-processed organic light-emitting diodes with red emission and decent device *** work indicates a new strategy to design highly efficient light emitting conjugated polymers.

关键词： Conjugated homopolymers Double B←N bridged bipyridine(BNBP) Deep-red emission High fluorescent efficiency

FUT8-mediated aberrant N-glycosylation of SEMA7A promotes head and neck squamous cell carcinoma progression

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International Journal of Oral Science 2024年第2期16卷 333-348页

作者： Zhonglong liu Xiaoyan meng Yuxin Zhang Jingjing Sun Xiao Tang Zhiyuan Zhang liu liu yue He Department of Oral Maxillofacial&Head and Neck Oncology Shanghai Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral DiseaseShanghaiChina Department of Oral Surgery Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineCollege of StomatologyShanghai Jiao Tong UniversityNational Center for StomatologyNational Clinical Research Center for Oral DiseasesShanghaiChina Department of Oral Pathology Shanghai Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University School of MedicineNational Clinical Research Center for Oral Disease ShanghaiShanghaiChina

SEMA7A belongs to the Semaphorin family and is involved in the oncogenesis and tumor *** glycosylation has been intricately linked with immune escape and tumor ***7A is a highly glycosylated protein with five glycosylated *** underlying mechanisms of SEMA7A glycosylation and its contribution to immunosuppression and tumorigenesis are ***,we identify overexpression and aberrant N-glycosylation of SEMA7A in head and neck squamous cell carcinoma,and elucidate fucosyltransferase FUT8 catalyzes aberrant core fucosylation in SEMA7A at N-linked oligosaccharides(Asn 105,157,258,330,and 602)via a direct protein‒protein interaction.A glycosylated statue of SEMA7A is necessary for its intra-cellular trafficking from the cytoplasm to the *** EGF triggers SEMA7A N-glycosylation through increasing the binding affinity of SEMA7A toward FUT8,whereas TGF-β1 promotes abnormal glycosylation of SEMA7A via induction of epithelial–mesenchymal *** N-glycosylation of SEMA7A leads to the differentiation of CD8^(+)T cells along a trajectory toward an exhausted state,thus shaping an immunosuppressive microenvironment and being resistant immunogenic cell *** of SEMA7A significantly improves the clinical outcome of EGFR-targeted and anti-PD-L1-based ***,we also define RBM4,a splice regulator,as a downstream effector of glycosylated SEMA7A and a pivotal mediator of PD-L1 alternative *** findings suggest that targeting FUT8-SEMA7A axis might be a promising strategy for improving antitumor responses in head and neck squamous cell carcinoma patients.

关键词： aberrant squamous SEMA

The potential of herbal drugs to treat heart failure:The roles of Sirt1/AMPK

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Journal of Pharmaceutical Analysis 2024年第2期14卷 157-176页

作者： Tao Zhang Lei Xu Xiaowei Guo Honglin Tao yue liu Xianfeng liu Yi Zhang Xianli meng State Key Laboratory of Southwestern Chinese Medicine Resources Innovative Institute of Chinese Medicine and PharmacyChengdu University of Traditional Chinese MedicineChengdu611137China College of Pharmacy Chengdu University of Traditional Chinese MedicineChengdu611137China School of Ethnic Medicine Chengdu University of Traditional Chinese MedicineChengdu611137China Meishan Hospital of Chengdu University of Traditional Chinese Medicine MeishanSichuan620032China

Heart failure(HF)is a highly morbid syndrome that seriously affects the physical and mental health of patients and generates an enormous socio-economic *** addition to cardiac myocyte oxidative stress and apoptosis,which are considered mechanisms for the development of HF,alterations in cardiac energy metabolism and pathological autophagy also contribute to cardiac abnormalities and ultimately *** information regulator 1(Sirt1)and adenosine monophosphate-activated protein kinase(AMPK)are nicotinamide adenine dinucleotide(NAD+)-dependent deacetylases and phosphorylated kinases,*** play similar roles in regulating some pathological processes of the heart through regulating targets such as peroxisome proliferator-activated receptorγcoactivator 1α(PGC-1α),protein 38 mitogen-activated protein kinase(p38 MAPK),peroxisome proliferator-activated receptors(PPARs),and mammalian target of rapamycin(mTOR).We summarized the synergistic effects of Sirt1 and AMPK in the heart,and listed the traditional Chinese medicine(TCM)that exhibit cardioprotective properties by modulating the Sirt1/AMPK pathway,to provide a basis for the development of Sirt1/AMPK activators or inhibitors for the treatment of HF and other cardiovascular diseases(CVDs).

关键词： Heart failure Silent information regulator 1 Adenosine monophosphate-activated protein kinase Traditional Chinese medicine

Knittable and washable aerogel fiber inspired by polar bear hair

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Science China Materials 2024年第2期67卷 705-706页

作者： yue liu Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Scienceand Institute of Fiber Materials and DevicesFudan UniversityShanghai 200438China

The advances in chemistry and materials have boosted the development of smart textiles,which are poised to revolutionize human lifestyles through multifunctional integration,such as heating,cooling,sensing and supplying energy^([1,2]).Among them,thermal insulation is an essential function of textiles to protect humans from complex and extreme environments and realize personal thermal management without energy con-sumption^([3]).

关键词： textiles insulation extreme

One-Pot Upgrading Polyethylene and CO_(2)to Aromatics via Tandem Catalysis

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CCS Chemistry 2024年第6期6卷 1422-1429页

作者： Wenjun Chen Yuchen Jiao yue liu meng Wang Fan Zhang Ding Ma National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan) College of ChemistrySichuan UniversityChengdu 610064Sichuan Beijing National Laboratory for Molecular Sciences New Cornerstone Science LaboratoryCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871

Polyolefins have the largest share in plastic waste,so it is vital to transform these end-of-life wastes into highly valued *** present here a new catalytic method to produce aromatics using PE as a carbon *** results indicate that polyethylene(PE)and CO_(2)can be converted into aromatics and CO simultaneously,achieving a high transformation rate and a 64.0%selectivity toward aromatics below 400℃ by Cu-Fe_(3)O_(4)and Zn/ZSM-5 tandem ***,the established theoretical limit of 50%selectivity toward aromatics in PE aromatization is *** is attributed to the coexistence of reverse water-gas shift,which converts another feed,CO_(2),with hydrogen to produce valuable CO,confirmed by^(13)C isotope *** consumes excessive hydrogen generated during PE aromatization to produce CO and mitigates the production of light alkanes from hydrogen transfer reactions,thereby augmenting the formation of aromatic *** research offers a new approach to valorizing two prevalent waste carbon sources:waste plastic and CO_(2),which is useful for designing a new strategy for upcycling waste carbon resources.

关键词： polyethylene CO_(2) tandem catalysis upgrading aromatics

AP-1 and SP1 trans-activate the expression of hepatic CYP1A1 and CYP2A6 in the bioactivation of AFB1 in chicken

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Science China(Life Sciences) 2024年第7期67卷 1468-1478页

作者： Jiang Deng Jia-Cheng Yang yue Feng Ze-Jing Xu Kamil Kuča meng liu Lv-Hui Sun State Key Laboratory of Agricultural Microbiology Hubei Hongshan LaboratoryFrontiers Science Center for Animal Breeding and Sustainable ProductionCollege of Animal Sciences and TechnologyHuazhong Agricultural UniversityWuhan 430070China Department of Chemistry Faculty of ScienceUniversity of Hradec KraloveHradec Kralove 50003Czech Republic

Dietary exposure to aflatoxin B1(AFB1)is harmful to the health and performance of domestic *** hepatic cytochrome P450s(CYPs),CYP1A1 and CYP2A6,are the primary enzymes responsible for the bioactivation of AFB1to the highly toxic exo-AFB1-8,9-epoxide(AFBO)in ***,the transcriptional regulation mechanism of these CYP genes in the liver of chicks in AFB1metabolism remains ***-luciferase reporter assay,bioinformatics and site-directed mutation results indicated that specificity protein 1(SP1)and activator protein-1(AP-1)motifs were located in the core region-1,063/-948,-606/-541 of the CYP1A1 promoter as well as-636/-595,-503/-462,-147/-1 of the CYP2A6 ***,overexpression and decoy oligodeoxynucleotide technologies demonstrated that SP1 and AP-1 were pivotal transcriptional activators regulating the promoter activity of CYP1A1 and ***,bioactivation of AFB1to AFBO could be increased by upregulation of CYP1A1 and CYP2A6 expression,which was trans-activated owing to the upregulation of AP-1,rather than SP1,stimulated by AFB1-induced reactive oxygen ***,nano-selenium could reduce ROS,downregulate AP-1 expression and then decrease the expression of CYP1A1 and CYP2A6,thus alleviating the toxicity of *** conclusion,AP-1 and SP1 played important roles in the transactivation of CYP1A1 and CYP2A6 expression and further bioactivated AFB1to AFBO in chicken liver,which could provide novel targets for the remediation of aflatoxicosis in chicks.

关键词： aflatoxin B1 CYP1A1 CYP2A6 SP1 AP-1 transcriptional activation

UKF‐MOT:An unscented Kalman filter‐based 3D multi‐object tracker

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CAAI Transactions on Intelligence Technology 2024年第4期9卷 1031-1041页

作者： meng liu Jianwei Niu Yu liu Collective Intelligence&Collaboration Laboratory China North Artificial Intelligence and Innovation Research InstituteBeijingChina China North Vehicle Research Institute BeijingChina State Key Laboratory of Software Development Environment School of Computer Science and EngineeringBeihang UniversityBeijingChina State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and EngineeringBeihang UniversityBeijingChina School of Computer Science and Engineering Beihang UniversityBeijingChina

Multi‐object tracking in autonomous driving is a non‐linear *** better address the tracking problem,this paper leveraged an unscented Kalman filter to predict the object's *** the association stage,the Mahalanobis distance was employed as an affinity metric,and a Non‐minimum Suppression method was designed for *** the detections fed into the tracker and continuous‘predicting‐matching’steps,the states of each object at different time steps were described as their own continuous *** conducted extensive experiments to evaluate tracking accuracy on three challenging datasets(KITTI,nuScenes and Waymo).The experimental results demon-strated that our method effectively achieved multi‐object tracking with satisfactory ac-curacy and real‐time efficiency.

关键词： autonomous vehicle transportation