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  1. Article ; Online: Giant N-heterocyclic carbene-containing macrocycles for cobalt-catalysed hydroboration of alkynes.

    Zhang, Guoqi

    Chemical communications (Cambridge, England)

    2022  Volume 58, Issue 58, Page(s) 8109–8112

    Abstract: Giant N-heterocyclic carbene-containing organic macrocycles larger than "Texas-sized" molecular boxes have been synthesized and structurally characterized. The new macrocycles were employed for the Co-NHC ... ...

    Abstract Giant N-heterocyclic carbene-containing organic macrocycles larger than "Texas-sized" molecular boxes have been synthesized and structurally characterized. The new macrocycles were employed for the Co-NHC promoted
    Language English
    Publishing date 2022-07-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d2cc02815h
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Giant N-heterocyclic carbene-containing macrocycles for cobalt-catalysed hydroboration of alkynes

    Zhang, Guoqi

    Chemical communications. 2022 July 19, v. 58, no. 58

    2022  

    Abstract: Giant N-heterocyclic carbene-containing organic macrocycles larger than “Texas-sized” molecular boxes have been synthesized and structurally characterized. The new macrocycles were employed for the Co-NHC promoted syn-selective hydroboration of alkynes ... ...

    Abstract Giant N-heterocyclic carbene-containing organic macrocycles larger than “Texas-sized” molecular boxes have been synthesized and structurally characterized. The new macrocycles were employed for the Co-NHC promoted syn-selective hydroboration of alkynes with good stereo- and regioselectivity.
    Keywords alkynes ; heterocyclic nitrogen compounds ; regioselectivity
    Language English
    Dates of publication 2022-0719
    Size p. 8109-8112.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d2cc02815h
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: A core-shell structured AuNPs@ZnCo-MOF SERS substrate for sensitive and selective detection of thiram.

    Xue, Wenxia / Fu, Jihong / Zhang, Yaxue / Ren, Shuxian / Liu, Guoqi

    Analytical methods : advancing methods and applications

    2024  Volume 16, Issue 12, Page(s) 1811–1820

    Abstract: Surface-enhanced Raman scattering (SERS) enables pesticide residue monitoring to become facile and efficient. In this study, a core-shell structured gold nanoparticles@ZnCo metal-organic framework (AuNPs@ZnCo-MOF) SERS substrate was designed and ... ...

    Abstract Surface-enhanced Raman scattering (SERS) enables pesticide residue monitoring to become facile and efficient. In this study, a core-shell structured gold nanoparticles@ZnCo metal-organic framework (AuNPs@ZnCo-MOF) SERS substrate was designed and successfully synthesized for efficient and selective detection of thiram. The bimetallic ZnCo-MOF shell can not only enrich the targeted molecules in the electromagnetic field because of its excellent absorptive capacity, but also act as a stabilized matrix for protecting the AuNPs from aggregation. The AuNPs@ZnCo-MOFs exhibited a high enhancement factor (EF) of 3.51 × 10
    Language English
    Publishing date 2024-03-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515210-5
    ISSN 1759-9679 ; 1759-9660
    ISSN (online) 1759-9679
    ISSN 1759-9660
    DOI 10.1039/d4ay00164h
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: An ionic Fe-based metal-organic-framework with 4'-pyridyl-2,2':6',2''-terpyridine for catalytic hydroboration of alkynes.

    Zhang, Guoqi / Zheng, Shengping / Neary, Michelle C

    RSC advances

    2023  Volume 13, Issue 4, Page(s) 2225–2232

    Abstract: An ionic metal-organic-framework (MOF) containing nanoscale channels was readily assembled from ditopic 4'-pyridyl-2,2':6',2''-terpyridine (pytpy) and a simple iron(ii) salt. X-ray structural analysis revealed a two-dimensional grid-like framework ... ...

    Abstract An ionic metal-organic-framework (MOF) containing nanoscale channels was readily assembled from ditopic 4'-pyridyl-2,2':6',2''-terpyridine (pytpy) and a simple iron(ii) salt. X-ray structural analysis revealed a two-dimensional grid-like framework assembled by classic octahedral (pytpy)
    Language English
    Publishing date 2023-01-12
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d2ra08040k
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: A high aspect ratio surface micromachined accelerometer based on a SiC-CNT composite material.

    Mo, Jiarui / Shankar, Shreyas / Pezone, Roberto / Zhang, Guoqi / Vollebregt, Sten

    Microsystems & nanoengineering

    2024  Volume 10, Page(s) 42

    Abstract: Silicon carbide (SiC) is recognized as an excellent material for microelectromechanical systems (MEMS), especially those operating in challenging environments, such as high temperature, high radiation, and corrosive environments. However, SiC bulk ... ...

    Abstract Silicon carbide (SiC) is recognized as an excellent material for microelectromechanical systems (MEMS), especially those operating in challenging environments, such as high temperature, high radiation, and corrosive environments. However, SiC bulk micromachining is still a challenge, which hinders the development of complex SiC MEMS. To address this problem, we present the use of a carbon nanotube (CNT) array coated with amorphous SiC (a-SiC) as an alternative composite material to enable high aspect ratio (HAR) surface micromachining. By using a prepatterned catalyst layer, a HAR CNT array can be grown as a structural template and then densified by uniformly filling the CNT bundle with LPCVD a-SiC. The electrical properties of the resulting SiC-CNT composite were characterized, and the results indicated that the electrical resistivity was dominated by the CNTs. To demonstrate the use of this composite in MEMS applications, a capacitive accelerometer was designed, fabricated, and measured. The fabrication results showed that the composite is fully compatible with the manufacturing of surface micromachining devices. The Young's modulus of the composite was extracted from the measured spring constant, and the results show a great improvement in the mechanical properties of the CNTs after coating with a-SiC. The accelerometer was electrically characterized, and its functionality was confirmed using a mechanical shaker.
    Language English
    Publishing date 2024-03-22
    Publishing country England
    Document type Journal Article
    ISSN 2055-7434
    ISSN (online) 2055-7434
    DOI 10.1038/s41378-024-00672-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Fluorine-Functionalized Covalent Organic Framework Superhydrophobic Modified Melamine Sponge for Efficient oil-water Separation.

    Zhang, Yaxue / Fu, Jihong / Xue, Wenxia / Liu, Guoqi / Wu, Ronglan

    Langmuir : the ACS journal of surfaces and colloids

    2024  Volume 40, Issue 12, Page(s) 6413–6423

    Abstract: Hydrophobic sponges have attracted significant interest in oil spills and water-oil separation as potential absorption materials due to their desirable absorptivity, selectivity, and elasticity. In this paper, a hydrophilic melamine sponge (MS) is ... ...

    Abstract Hydrophobic sponges have attracted significant interest in oil spills and water-oil separation as potential absorption materials due to their desirable absorptivity, selectivity, and elasticity. In this paper, a hydrophilic melamine sponge (MS) is transferred into a superhydrophobic sponge via polydimethylsiloxane (PDMS) modification followed by in situ growth of fluorine-functionalized covalent organic framework (denoted as TFA-COF) nanoparticles. Therefore, the PDMS@TFA-COF@MS sponge was successfully prepared for efficient oil-water separation. The resultant PDMS@TFA-COF@MS exhibits superhydrophobic properties with a water contact angle of 156.7°. The superhydrophobic sponge has selectivity adsorption for different organic solvents and oils from water as well as oil-water separation efficiency (96% after 30 cycles) and oil absorption capacity (12 646% after 30 cycles). Meanwhile, the PDMS@TFA-COF@MS sponge exhibits strong thermal stability and flame retardancy in addition to having exceptional resistance to chemical corrosion in acidic, alkaline, and salt solutions. Moreover, the surfactant-stabilized oil-in-water emulsion could be efficiently separated by the sponge. Therefore, the prepared superhydrophobic PDMS@TFA-COF@MS sponge demonstrates possible uses for long-life oil-water separation applications.
    Language English
    Publishing date 2024-03-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.3c04002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Multimodal fall detection for solitary individuals based on audio-video decision fusion processing.

    Jiao, Shiqin / Li, Guoqi / Zhang, Guiyang / Zhou, Jiahao / Li, Jihong

    Heliyon

    2024  Volume 10, Issue 8, Page(s) e29596

    Abstract: Falls often pose significant safety risks to solitary individuals, especially the elderly. Implementing a fast and efficient fall detection system is an effective strategy to address this hidden danger. We propose a multimodal method based on audio and ... ...

    Abstract Falls often pose significant safety risks to solitary individuals, especially the elderly. Implementing a fast and efficient fall detection system is an effective strategy to address this hidden danger. We propose a multimodal method based on audio and video. On the basis of using non-intrusive equipment, it reduces to a certain extent the false negative situation that the most commonly used video-based methods may face due to insufficient lighting conditions, exceeding the monitoring range, etc. Therefore, in the foreseeable future, methods based on audio and video fusion are expected to become the best solution for fall detection. Specifically, this article outlines the following methodology: the video-based model utilizes YOLOv7-Pose to extract key skeleton joints, which are then fed into a two stream Spatial Temporal Graph Convolutional Network (ST-GCN) for classification. Meanwhile, the audio-based model employs log-scaled mel spectrograms to capture different features, which are processed through the MobileNetV2 architecture for detection. The final decision fusion of the two results is achieved through linear weighting and Dempster-Shafer (D-S) theory. After evaluation, our multimodal fall detection method significantly outperforms the single modality method, especially the evaluation metric sensitivity increased from 81.67% in single video modality to 96.67% (linear weighting) and 97.50% (D-S theory), which emphasizing the effectiveness of integrating video and audio data to achieve more powerful and reliable fall detection in complex and diverse daily life environments.
    Language English
    Publishing date 2024-04-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2024.e29596
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Successful percutaneous coronary intervention with extracorporeal membrane oxygenation in a patient with acute inferior wall myocardial infarction complicated by electrical storm, cardiogenic shock, and cardiac arrest: a case report.

    Yan, Bixia / Zhang, Guoqi / Huang, Chaolong / Liu, Zhengjiang

    Journal of cardiothoracic surgery

    2023  Volume 18, Issue 1, Page(s) 47

    Abstract: Background: High-risk patients with coronary heart disease who develop acute myocardial infarction (AMI) have severe coronary lesions. If severe complications occur, such as malignant ventricular arrhythmia, cardiogenic shock, and cardiac arrest, ... ...

    Abstract Background: High-risk patients with coronary heart disease who develop acute myocardial infarction (AMI) have severe coronary lesions. If severe complications occur, such as malignant ventricular arrhythmia, cardiogenic shock, and cardiac arrest, implementation of emergency percutaneous coronary intervention (PCI) may be hindered, leading to a higher perioperative mortality rate. Extracorporeal membrane oxygenation (ECMO) can pave the way for rapid myocardial reperfusion therapy. When cardiac arrest occurs, hemodynamic support with ECMO can facilitate revascularization with PCI, which can increase the time available for further salvage and treatment and reduce intraoperative risk during PCI.
    Case presentation: Herein, we report a case of a 61-year-old man with AMI who suffered electrical storm of sustained malignant ventricular fibrillation, cardiogenic shock, and cardiac arrest and was successfully treated with PCI with ECMO support. During PCI, repeated aspiration and removal of the right coronary artery thrombus were performed, and blood flow was restored after right coronary artery balloon dilation. One episode of defibrillation was delivered to restore sinus rhythm. Then, stents were implanted in the distal and proximal right coronary artery lesions to achieve revascularization. After PCI with ECMO support, irreversible malignant arrhythmia returned to sinus rhythm through coronary perfusion, which prevented death following unsuccessful cardiopulmonary resuscitation. After applying active treatments, including anti-shock, mechanical ventilation, anti-inflammation, and organ support, the patient was discharged after his condition and vital signs stabilized. The patient was followed up once a week after hospital discharge, and his cardiopulmonary function recovered well.
    Conclusions: With ECMO support, PCI should be performed immediately in patients with inferior wall AMI complicated by electrical storm of sustained ventricular fibrillation, cardiogenic shock, and cardiac arrest to facilitate stent placement, achieve complete revascularization, restore coronary perfusion, and avoid death.
    MeSH term(s) Male ; Humans ; Middle Aged ; Shock, Cardiogenic/etiology ; Shock, Cardiogenic/therapy ; Extracorporeal Membrane Oxygenation/adverse effects ; Inferior Wall Myocardial Infarction/complications ; Percutaneous Coronary Intervention/adverse effects ; Ventricular Fibrillation/complications ; Ventricular Fibrillation/therapy ; Myocardial Infarction/complications ; Myocardial Infarction/surgery ; Heart Arrest/etiology ; Heart Arrest/therapy
    Language English
    Publishing date 2023-01-24
    Publishing country England
    Document type Case Reports ; Journal Article
    ZDB-ID 2227224-0
    ISSN 1749-8090 ; 1749-8090
    ISSN (online) 1749-8090
    ISSN 1749-8090
    DOI 10.1186/s13019-023-02113-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Assessment of suitable areas for afforestation and its carbon sink value in fragile ecological areas of northern China.

    Jianfeng, Sun / Li, Guangdong / Zhang, Ying / Qin, Weishan / Chai, Guoqi

    Journal of environmental management

    2023  Volume 348, Page(s) 119401

    Abstract: Afforestation and reforestation are pivotal in mitigating land degradation and bolstering the carbon sink capacity of terrestrial ecosystems. However, the potential economic ramifications of afforestation and reforestation in the context of climate ... ...

    Abstract Afforestation and reforestation are pivotal in mitigating land degradation and bolstering the carbon sink capacity of terrestrial ecosystems. However, the potential economic ramifications of afforestation and reforestation in the context of climate change remain largely unexplored. In this study, we employed an interdisciplinary methodology to establish a framework for assessing future forest potential and carbon sequestration in the Eastern Loess Plateau region of China. Our findings indicate that an estimated 17,392.99 km
    MeSH term(s) Ecosystem ; Carbon Sequestration ; Forests ; China ; Carbon/analysis ; Trees/metabolism
    Chemical Substances Carbon (7440-44-0)
    Language English
    Publishing date 2023-11-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2023.119401
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: BME Frontiers: A Platform for Engineering the Future of Biomedicine.

    Li, Xingde / Zhang, Guoqi / Tang, Yuguo

    BME frontiers

    2020  Volume 2020, Page(s) 2095460

    Language English
    Publishing date 2020-04-28
    Publishing country United States
    Document type Editorial
    ISSN 2765-8031
    ISSN (online) 2765-8031
    DOI 10.34133/2020/2095460
    Database MEDical Literature Analysis and Retrieval System OnLINE

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