Publications by authors named "Wan Zhen"

Article Synopsis
  • The study analyzed the clinical characteristics of vaccinated versus non-vaccinated patients infected with the Omicron variant of COVID-19 to improve diagnosis and treatment strategies.
  • A total of 360 COVID-19 patients were assessed for antibody levels and virus shedding duration, highlighting the impact of factors like vaccination dose and timing.
  • Results indicated that booster vaccinations significantly increased IgG antibodies and reduced the duration of virus shedding in vaccinated individuals compared to those unvaccinated.
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Introduction: Tuberculosis (TB) stands as a paramount global health concern, contributing significantly to worldwide mortality rates. Effective containment of TB requires deployment of cost-efficient screening method with limited resources. To enhance the precision of resource allocation in the global fight against TB, this research proposed chest X-ray radiography (CXR) based machine learning screening algorithms with optimization, benchmarking and tuning for the best TB subclassification tasks for clinical application.

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  • Nanomechanical resonators made from suspended graphene can detect pressure changes very sensitively but face issues with gas leaking between the graphene film and its base.
  • To improve this, researchers created edge-deposited graphene resonators using focused ion beam deposition, which successfully reduced gas leakage rates across different sizes of resonators.
  • The study found that the pressure sensitivity of these resonators varied by size, showing improved pressure-sensing performance and minimal temperature-related frequency drift, highlighting enhancements in gas leakage control and pressure sensor capabilities.
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  • Excessive NADH levels in organisms are linked to several diseases, creating a need for efficient conversion to NAD.
  • Researchers developed multi-metal atom nanozymes (MANs) that mimic natural enzymes to facilitate this conversion, with a focus on the RhCo MAN demonstrating effective oxidase-like activity.
  • The RhCo MAN not only enhances NAD regeneration but also helps modulate macrophage polarization, potentially aiding in skin regeneration, while other variants show limited effectiveness in treating conditions like eczema.
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  • This study introduces a high-sensitivity accelerometer that uses a pressure-based sensing method with a graphene resonator attached to a silicon film and an optical fiber system.
  • The design minimizes energy loss and vibration mode interference, ensuring precise measurement of mechanical vibrations.
  • The accelerometer's sensitivity is notably high at 34.3 kHz/g in the 0-3.5 g range, making it significantly more effective than similar devices that rely on traditional proof mass methods.
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The COVID-19 epidemic has spread to the whole world for three years and has had a serious impact on human life, health and economic activities. China's epidemic prevention and control has gone through the following stages: emergency unconventional stage, emergency normalization stage, and the transitional stage from the emergency normalization to the "Category B infectious disease treated as Category B" normalization, and achieved a major and decisive victory. The designated hospitals for prevention and control of COVID-19 epidemic in Tianjin has successfully completed its tasks in all stages of epidemic prevention and control, and has accumulated valuable experience.

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Two-dimensional (2D) TiCT MXene materials show great potential in electrochemical and flexible sensors due to their high electrical conductivity, good chemical stability, and special delaminated structure. However, their thermal properties were rarely studied, which remarkably affect the stability and safety of various devices. Here, we fabricated a suspended MXene drum resonator photothermally driven by a sinusoidally modulated laser, measured the thermal time constant by demodulating the thermomechanical motion, and then calculated the thermal conductivity and thermal diffusivity of the MXene film.

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For exerting high sensitivity of ultrathin graphene to detection deformation, an enlarged backing air cavity (EBC) structure is developed to further enhance the mechanical sensitivity () of a graphene-based Fabry-Perot (F-P) acoustic sensor. COMSOL acoustic field simulation on the air cavity size-dependent confirms the optimal length and radius of the EBC of 0.2 and 1.

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The pituitary is a vital endocrine organ for synthesis and secretion of gonadotropic hormones (FSH and LH), and the gonadotropin showed fluctuations in animals with different fecundity. Long non-coding RNAs (lncRNAs) have been identified as regulatory factors for the reproductive process. However, the profiles of lncRNAs and their roles involved in sheep fecundity remains unclear.

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Article Synopsis
  • Nanomechanical resonators using suspended graphene show high pressure sensitivity but face energy loss issues in nonvacuum environments due to air damping and gas leakage.
  • A new graphene resonant pressure sensor design combines multilayer graphene in a vacuum-sealed structure with pressure-sensitive silicon film, significantly reducing energy loss and addressing gas permeation problems.
  • This innovative sensor achieves a high pressure sensitivity of 1.7 Hz/Pa—five times higher than traditional silicon sensors—along with an excellent signal-to-noise ratio and low temperature drift, enhancing long-term stability and efficiency.
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  • The study investigates a dual catalytic system for co-pyrolyzing lignin and spent bleaching clay (SBC) to produce mono-aromatic hydrocarbons (MAHs).
  • The optimal conditions were found to be at 550 °C with a CSBC-to-HZSM-5 ratio of 1:1 and a raw materials-to-catalyst ratio of 1:2, resulting in a bio-oil yield of 21.35 wt% and a high MAHs content of 73.34%.
  • The introduction of SBC helps reduce unwanted byproducts like graphite-like coke and highlights the potential to utilize spent bleaching clay while addressing its environmental impacts.
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Following the publication of this article, a concerned reader drew to the Editor's attention that various of the data panels showing the results from Transwell cell migration and invasion assay experiments in Figs. 2D and 4D contained groupings of cells that were markedly similar, even though the cells appeared in separate panels that were intended to show the results from different experiments. In addition, the cell images shown in Fig.

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We analyzed the risk factors of mortality for patients with pulmonary tuberculosis under the Directly Observed Treatment Shortcourse (DOTS) and established a predictive nomogram for the risk of mortality. The retrospective cohort analysis was conducted on the treatment outcomes of 11207 tuberculosis patients in the tuberculosis management information system in Tianjin from 2014 to 2019. Based on the multivariable unconditional logistic regression, we analyzed the risk factors of mortality in patients with pulmonary TB and established the death risk prediction nomogram.

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Graphene resonant sensors have shown strong competitiveness with respect to sensitivity and size. To advance the applications of graphene resonant sensors, the damage behaviors of graphene harmonic oscillators after thermal annealing and laser irradiation were investigated by morphology analysis and frequency domain vibration characteristics. The interface stress was proven to be the key factor that directly affected the yield of resonators.

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The pituitary gland directly regulates the reproduction of domestic animals. Research has increasingly focused on the potential regulatory mechanism of non-coding RNA in pituitary development. Little is known about the differential expression pattern of lncRNAs in Hu sheep, a famous sheep breed with high fecundity, and its role in the pituitary gland between the follicular phase and luteal phase.

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Pituitary gonadotropins play a pivotal role in reproduction. Long noncoding RNAs (lncRNAs) have been identified as important regulators in the hypothalamic−pituitary−ovarian (HPO) axis associated with reproduction. However, the contributions of lncRNAs to pituitary gonadotropin secretion remain largely unknown.

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Liver cancer is one of the most common malignant solid tumor types worldwide. The solute carrier (SLC)39A family is a main member of the SLC group of membrane transport proteins, which transfer zinc to the cytoplasm when cells are depleted of zinc; thus, it may provide a novel therapeutic target for human cancer. However, the prognostic value of SLC39A genes in patients with liver cancer has remained elusive.

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The SMAD protein family plays crucial roles in reproduction as a downstream target genes of the TGFβ signaling pathway. Many studies have focused on the expression change exploration of SMADs during testicular development and investigation of SMAD2 in hormone synthesis regulation. However, little attention has been given to determining the regulatory mechanism of SMADs in sheep testes.

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Aflatoxin B (AFB) is the most harmful mycotoxin and presents risks to human health. Utilization of enzyme to degrade AFB1 is a promising strategy to overcome this problem. In this study, we evaluated the effect of recombinant laccase expressed in Saccharomyces cerevisiae on the degradation of AFB.

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Hepatic arterial flow may have a profound influence on the regeneration process and intergraft competition in dual graft liver transplant. Here, we report a case of impaired left hepatic arterial flow and left lobe graft atrophy in a dual graft recipient. A 52-year-old male patient with hepatitis C-related liver cirrhosis received the right liver lobe from his daughter together with the left lobe from his brother to get an adequate graft volume (65.

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Dry fermented sausage is popular among the world because of its rich nutrition and unique flavor. Starter cultures play an important role in the quality of dry fermented sausage. In this study, probiotics lactic acid bacteria N102, H1-5, Y4-1, and Y12-3 were isolated from food-borne materials.

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Background: Surgeons are likely to get progressively fatigued during the course of a normal workday. The objective of this study was to evaluate the impact of surgeon work duration prior to performing distal pancreatectomy (DP) on the perioperative outcome, especially frequency of grade II or higher grade postoperative complications.

Methods: Patients undergoing DP for all causes were divided into two groups according to surgeon work hours prior to performing DP: group A (less than 5 h) and group B (5-10 h).

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Article Synopsis
  • - The text reviews a microbe from a specific genus and family that is widely found in various environments, including food, plants, and soil, and discusses its applications in probiotic and prebiotic fermentation processes.
  • - This microbe has the potential to synthesize bioactive compounds like peptides and exopolysaccharides, as well as antimicrobial substances, which enhances its value in the food sector.
  • - Additionally, it is capable of hydrolyzing complex compounds such as proteins and carbohydrates, making it a versatile and promising candidate for use in functional food processing and improving the quality of food products.
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  • Spermatogenesis is a crucial process for male reproduction, involving interactions between male germ cells and somatic cells, which are challenging to profile due to cellular diversity.
  • The study utilizes advanced 10× genomics single-cell sequencing to analyze 11,772 cells from adult sheep testis, identifying distinct germ cells and somatic cells, including unexpected leukocytes.
  • Functional enrichment analysis reveals key pathways linked to germ cell development and somatic cell functions and identifies specific marker genes for various sheep germ cell stages, offering new insights into sheep spermatogenesis and cell development.
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Laparoscopic common bile duct exploration (LCBDE) has been recently introduced for management of CBD stone in patients with previous biliary surgery history. The aim of this study was to evaluate the safety and effectiveness of primary closure in patients with previous biliary surgery history compared to T-tube drainage. Eighty patients with previous biliary surgery history including laparoscopic cholecystectomy, open cholecystectomy, or open common bile duct exploration were enrolled in the retrospective study.

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