Publications by authors named "Haojun Yuan"

This study introduces a cutting-edge, high-resolution tool leveraging the predictive prowess of convolutional neural networks to advance the field of hazard assessment in urban pluvial flooding scenarios. The tool uniquely accounts for the high heterogeneity of urban space and the potential impact of complex climate scenarios, which are often underestimated by traditional data-reliant methods. Employing Shenzhen as a case study, the model showcased superior accuracy, resilience, and interpretability, illuminating potential flood hazards.

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Stormwater management problems have been deteriorated with the high frequency and intensity of precipitation owing to rapid urbanization and climate variability, especially in urban highly built-up area. Nature-based solutions (NBS) have emerged as a powerful measure for rising these challenges due to their ability to mitigate urban waterlogging and increase carbon sequestration. Identifying optimal locations for NBS implementation remains a critical research focus.

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Article Synopsis
  • Pancreatic cancer is hard to detect early, leading to poor treatment responses; a new study proposes a method using advanced technology to improve early detection and monitoring.* -
  • The method includes a combination of single-cell capturing, tumor-targeted silver nanoparticles, and specialized fiber optics with Raman spectroscopy, which enhances signal clarity and reduces noise.* -
  • Findings show that this approach successfully identifies molecular changes in pancreatic cancer cells and highlights important cellular components, making it a promising tool for faster and more accurate diagnosis.*
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Early screening for pathogens is crucial during pandemic outbreaks. Nucleic acid testing (NAT) is a valuable method for keeping pathogens from spreading. However, the long detection time and large size of the instruments involved significantly limited the efficiency of detection.

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Noninvasive and sensitive thermometry of a single cell during the normal physiological process is crucial for analyzing fundamental cellular metabolism and applications to cancer treatment. However, current thermometers generally sense the average temperature variation for many cells, thereby failing to obtain real-time and continuous data of an individual cell. In this study, we employed platinum (Pt) electrodes to construct an integrated microfluidic chip as a single-cell thermometer.

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The electrochemiluminescence (ECL) behavior of a tri(2,2'-bipyridyl)ruthenium(ii) (Ru(bpy))/tripropylamine (TPrA) system was investigated in sensor chips with two kinds of integrated two-electrode systems, which included screen-printed electrodes (SPE) and physical vapor deposition (PVD) electrodes. Firstly, under excitation with an optimal transient potential (TP) within 100 ms, the ECL assay could be carried out on the microchips using an Au & Au electrode system, emitting strong and stable light signal. Secondly, on the PVD chip, the ECL intensity initiated by optimal TP was eight times stronger than the peak light signal emitted by the linear sweep voltammetry model.

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Hydrothermal carbonization has gained attention in converting wet organic solid waste into hydrochar with many applications such as solid fuel, energy storage material precursor, fertilizer or soil conditioner. Recently, various catalysts such as organic and inorganic catalysts are employed to guide the properties of the hydrochar. This review presents a summarize and a critical discussion on types of catalysts, process parameters and catalytic mechanisms.

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Article Synopsis
  • - This study addresses the challenge of detecting rare mutations in the EGFR gene from circulating tumor DNA (ctDNA) in lung cancer, due to interference from excess normal DNA.
  • - Researchers developed a droplet digital PCR (ddPCR) platform using a PDMS chip and double-layer glass reservoir, which efficiently creates and protects tiny droplets necessary for accurate mutation detection.
  • - The device demonstrated high sensitivity, successfully identifying the rare EGFR L858R mutation even in samples with a high background of wild-type DNA, and was validated on lung cancer patient samples.
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As a member of the long non‑coding (lnc)RNA family, lncRNA maternally expressed 8, small nucleolar RNA host gene (), has been reported to serve an oncogenic role in several types of malignancies, including hepatocellular carcinoma, non‑small cell lung cancer and pancreatic cancer. The current study aimed to investigate the effect of the knockdown of on human hemangioma endothelial cell (HemEC) proliferation, apoptosis and invasion, in addition to determining the underlying molecular mechanism. The knockdown of was achieved by transfecting small interfering (si)RNA into HemECs, while the combined knockdown of knockdown and microRNA (miR)‑203 was established by co‑transfecting siRNA and a miR‑203 inhibitor into HemECs.

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Lung cancer is one of the common malignant tumors with a high incidence and mortality rate. Targeted therapies are efficient on lung cancer patients with specific gene mutations. Circulating tumor cells (CTCs) are used for liquid biopsy, providing genetic information for lung cancer treatment selection and prognosis.

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In view of their critical function in metastasis, characterization of single circulating tumor cells (CTCs) can provide important clinical information to monitor tumor progression and guide personal therapy. Single-cell genetic analysis methods based on microfluidics have some inherent shortcomings such as complicated operation, low throughput, and expensive equipment requirements. To overcome these barriers, we developed a simple and open micro-well array containing 26,208 units for either nuclear acids or single-cell genetic analysis.

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In this study the wound status of skin flap repair patients were closely observed, there were sign of infection. The secretion were taken for bacterial culture and sensitivity analysis and given sensitive antibiotics to active treatment. Patients received intravenous antibiotics 30 minutes before surgery to prevent infection.

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Circulating tumor cells (CTCs) have become an important biomarker for liquid biopsy to monitor tumor progression and indicate response to therapies. Many epithelial cellular adhesion molecule (EpCAM) dependent CTC isolation methods have been developed, which have a limitation for low EpCAM expressed tumor cells. In an effort to overcome these drawbacks, we developed combined immunomagnetic beads (EpCAM, Mucin1 and epidermal growth factor receptor) to sensitively isolate CTCs for immunofluorescence analysis and genetic characterization.

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Droplet microfluidics, which involves micrometer-sized emulsion droplets on a microfabricated platform, has been demonstrated as a unique system for many biological and chemical applications. Robust and scalable generation of monodisperse droplets at high throughput is of fundamental importance for droplet microfluidics. Classic designs for droplet generation employ shear fluid dynamics to induce the breakup of droplets in a two-phase flow and the droplet size is sensitive to flow rate fluctuations, often resulting in polydispersity.

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The oral and maxillofacial region is rich in blood, and it is often difficult to stop bleeding during the operation of maxilla. Nitroglycerin is one of the most commonly used antihypertensive drugs in our hospital. We observed the effect of controlled hypotension in patients with maxillary resection.

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Wound repair surgeries are the most common childhood surgery in most countries. Medical treatment itself will impact children's mental health. The authors' objective was to study the impact of parental presence in preschool children and to reveal the conditions and precautions of it.

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Reconstruction of large cutaneous defects is a challenging task for plastic surgeons. When the skin defect is only part of the complex defects after expansion resection of oral cancer and neck dissection should be done at the same time, it is a daunting task to obtain a cosmetic post-operative appearance. We designed bilobed platysma myocutaneous flaps to reconstruct the mandibular region cutaneous defects.

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Circulating tumor cells (CTCs) have attracted pretty much attention from scientists because of their important relationship with the process of metastasis. Here, we developed a size-based microfluidic chip containing triangular pillar array and filter channel array for detecting single CTCs and CTC clusters independent of tumor-specific markers. The cell populations in chip were characterized by immune-fluorescent staining combining an epithelial marker and a mesenchymal marker.

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