Search

Abstract Background Osteoarthritis (OA) is a prevalent degenerative joint disease and current therapies are insufficient to halt its progression. Mesenchymal stem cells-derived extracellular vesicles (MSCs-EVs) offer promising therapeutic potential for OA treatment, and their efficacy can be enhanced through strategic engineering approaches. Methods Inspired by the immune memory of the adaptive immune system, we developed an engineered strategy to impart OA-specific immune memory to MSCs-EVs. Using Luminex technology, inflammatory factors (IFN-γ, IL-6, and TNF-α), which mimic the OA inflammatory microenvironment, were identified and used to prime MSCs, generating immune memory-bearing MSCs-EVs (iEVs). Proteomic analysis and complementary experiments were conducted to evaluate iEVs’ effects on macrophage phenotypic reprogramming. Results iEVs, particularly IL-6-EV, exhibited potent immunoregulatory functions along with the ability to modulate mitochondrial metabolism. Both in vitro and in vivo, IL-6-EV significantly reprogrammed macrophages towards the M2 subtype, effectively suppressing articular inflammation and OA progression. Mechanistic studies revealed that IL-6-EV facilitated M2 polarization by regulating mitochondrial oxidative phosphorylation via the mt-ND3/NADH-CoQ axis. Conclusion This study introduces a strategy to enhance MSCs-EVs’ therapeutic efficacy in OA. Multi-omics analysis and biological validation demonstrate its potential, providing new insights for MSCs-EVs’ future application in OA and other clinical conditions. Graphical Abstract more...

ObjectiveTo explore the valve regurgitation status of left heart after the implantation of left ventricular assist device (LVAD) and its effect on prognosis of patients with LVAD implantation. MethodsA total of 35 patients with cardiomyopathy who underwent magnetic levitation LVAD implantation at Zhongshan Hospital, Fudan University from February 2021 to July 2024 were retrospectively selected. Clinical data during hospitalization were collected, including preoperative basic data and postoperative valve regurgitation status. Telephone follow-ups were conducted to monitor patients’ survival status and transthoracic echocardiography was used to assess left valve function. Kaplan-Meier survival curves and log-rank test were employed to compare the survival rate of patients with different levels of valve regurgitation. ResultsThe 35 patients had a mean age of (53.9±11.1) years, with 85.7% male, and 3 patients (8.6%) died during hospitalization. Preoperatively, 17 patients (48.6%) had moderate or greater mitral regurgitation, while all 35 patients had less than moderate aortic regurgitation. One month postoperatively, thirty patients were followed up, among which 24 patients (80%) had less than moderate mitral regurgitation, including 11 cases with alleviated regurgitation compared to pre-surgery; 6 patients (20%) had moderate or greater mitral regurgitation, including 4 cases with stable regurgitation and 2 cases with progression of regurgitation compared to pre-surgery; 2 patients (6.7%) had progression of aortic regurgitation to moderate or greater. The follow-up time was 1.2 (1.0, 2.1) years, with 1-year survival rate of 91.4% and 3-year survival rate of 71.1%. Survival analysis showed that the 3-year survival rate of patients with moderate or greater mitral regurgitation one month postoperatively was significantly lower than that of patients with less than moderate regurgitation (66.7% vs 83.3%, P＝0.046). ConclusionsAfter the implantation of magnetic levitation LVAD, most patients showed improvement in mitral regurgitation, while aortic regurgitation remained unchanged. The degree of mitral regurgitation one month postoperatively is associated with prognosis. more...

Abstract Background Intracardiac thrombus (ICT) is the rarest yet most severe complication of severe Mycoplasma pneumoniae pneumonia (SMPP) in children. This study aims to elucidate the clinical characteristics of patients with SMPP-related ICT. Methods We retrospectively enrolled 68 children with SMPP (18 cases of ICT, 50 cases of non-ICT) who were admitted from January 2014 to January 2024. We compared their demographic data, clinical symptoms, laboratory tests, imaging findings, treatment strategies, and prognoses. Additionally, we summarized data from 33 confirmed SMPP-related ICT cases reported in 12 references. Results In our cohort, the ICT group exhibited higher incidences of tachypnea, chest pain, inflammation, and elevated D-dimer levels. They also presented more severe radiological findings and had longer hospital stays compared to the non-ICT group. The chordae tendineae-attached was the most common type (61.1%). Pathological examinations revealed ICT sizes ranging from 480 to 31,500 mm³. A favorable prognosis was observed in 94.4% of ICT patients. Clinical features did not significantly differ between various ICT types. In the overall cohort (51 cases), the right ventricle was the predominant location (68.6%). Notably, 66.7% of patients had concurrent extracardiac thrombosis, with pulmonary thrombosis being the most common subtype (41.2%). Conclusions The clinical characteristics of SMPP-related ICT are non-specific, often coexisting with severe pulmonary lesions and significantly elevated inflammatory markers. All ICT types were chordae tendineae or wall-attached, rather than mobile. These findings suggest that an inflammation storm induced by SMPP may play a significant role in the pathogenesis of in situ thrombosis within the heart and major blood vessels. more...

This study aimed to examine the impact of the Transtheoretical model (TTM)-based nursing model on the self-management and psychological well-being of men diagnosed with primary hepatocellular carcinoma. From existing case records, a retrospective analysis was conducted on the clinical data of 96 male patients with primary liver cancer. Based on the different care methods recorded, the study included 48 patients in the observation group and 48 patients in the control group. All patients underwent hepatocellular carcinoma resection and were expected to survive for more than 3 months. Control group participants received standard treatment, whereas observation group participants underwent a patient self-management intervention based on the TTM nursing model. Both groups were assessed for postoperative rehabilitation, self-management capacity, anxiety and depression levels, psychological well-being, quality of life, tumor-related illness and satisfaction of both groups. After nursing intervention, in the observation group, the time to get out of bed, bowel sound recovery time, first exhaustion time and first defecation time were significantly shorter compared to the control group (p < 0.05). Self-care agency scale (ESCA) scores in the observation group were significantly greater than in the control group (p < 0.05). Self-rating anxiety scale (SAS), Self-rating depression scale (SDS) scores and quality of life were significantly lower in the observation group. As compared to the control group, the observation group exhibited a considerably decreased incidence of cancer-related symptoms, including fever, jaundice, abdominal pain and gastrointestinal hemorrhage (p < 0.05). The observation group was more satisfied overall than the control group. Behavioral stage change theory collaborative nursing model has shown promising results in enhancing self-care abilities and reducing negative feelings in male patients with primary liver cancer. Therefore, further promotion and implementation of this intervention is recommended. more...

Abstract Background At present, relevant studies have found that baicalin can improve macular edema (ME) caused by glaucoma, but the effect on branch retinal vein occlusion (BRVO) is still unclear. Methods The CoCl2-stimulated ARPE-19 cells were treated with different concentrations of baicalin and detected cell viability, apoptosis and oxidative stress. Next, the hypoxia-inducible factor-1α (HIF-1α) overexpression vector or siRNA were transfected into CoCl2-stimulated ARPE-19 cells, and the cell changes were detected. We searched the potential binding proteins of HIF-1α through the online database, and screened vascular endothelial growth factor A (VEGFA) as the research object. The CoCl2-stimulated ARPE-19 cells were treated with baicalin alone, or transfected with HIF-1α overexpression vector, or transfected with HIF-1α overexpression vector and VEGFA siRNA, and the cell changes were detected. Finally, we verified the therapeutic effect of baicalin on BRVO rats in vivo. Results Baicalin inhibited CoCl2-induced apoptosis, inflammation and oxidative stress in ARPE-19 cells, and baicalin inhibited HIF-1α protein expression. In CoCl2-induced hypoxia cells, HIF-1α aggravated apoptosis, inflammation and oxidative stress, while HIF-1α silencing alleviated cell damage. Mechanism study showed that in baicalin-treated CoCl2-induced cells, VEGFA protein expression decreased and cell damage was improved, but this protective effect was counteracted by HIF-1α, and VEGFA silencing again inhibited apoptosis, inflammation and oxidative stress. Baicalin inhibited HIF-1α and VEGFA protein expression in the retinal tissue of BRVO rats, reduced injury, and promoted the recovery of ganglion cell layer. Conclusions Baicalin alleviated ARPE-19 cell injury and improved BRVO in rats by inhibiting HIF-1α/VEGFA axis in vivo and in vitro. more...

Abstract We present two rare cases of p67phox-deficient chronic granulomatous disease (CGD) caused by compound heterozygous mutations in the NCF2 gene. They developed cervical lymphadenitis as the initial manifestation of CGD but had distinct clinical progressions. Patient 1 presented with aspergillous meningitis, an extremely rare manifestation of neurological involvement in CGD, which has not been reported before. Patient 2 presented with non-infectious inflammatory lymphadenitis is also very rare and has not been reported previously. These cases emphasize the importance of considering p67phox-deficient CGD in children with late-onset invasive fungal infections and non-infectious inflammatory lesions. Additionally, we also reviewed previous reports of Chinese patients with P67phox-Deficient CGD. Our objective is to raise awareness about the clinical, diagnostic, and genetic characteristics of P67phox-deficient CGD in China, to reduce misdiagnosis and improve the management and prognosis of the disease. more...

Abstract Sorghum is the world’s fifth-largest cereal crop, and anthracnose (Colletotrichum sublineola) is the main disease affecting sorghum. However, systematic research on the cellular structure, physiological and biochemical, and genes related to anthracnose resistance and disease resistance evaluation in sorghum is lacking in the field. Upon inoculation with anthracnose (C. sublineola) spores, disease-resistant sorghum (gz93) developed a relative lesion area (RLA) that was significantly smaller than that of the disease-susceptible sorghum (gz234). The leaf thickness, length and profile area of leaf mesophyll cells, upper and lower epidermal cells decreased in the lesion area, with a greater reduction observed in gz234 than in gz93. The damage caused by C. sublineola resulted in a greater decrease in the net photosynthetic rate (Pn) in gz234 than in gz93, with early-stage reduction due to stomatal limitation and late-stage reduction caused by lesions. Overall, the activities of superoxide dismutase (SOD) and catalase (CAT), the content of proline (Pro), abscisic acid (ABA), jasmonic acid (JA), salicylic acid (SA), and gibberellic acid (GA3), are higher in gz93 than in gz234 and may be positively correlated with disease resistance. While malondialdehyde (MDA) may be negatively correlated with disease resistance. Disease-resistant genes are significantly overexpressed in gz93, with significant expression changes in gz234, which is related to disease resistance in sorghum. Correlation analysis indicates that GA3, MDA, peroxidase (POD), and disease-resistance genes can serve as reference indicators for disease severity. The regression equation RLA = 0.029 + 8.02 × 10−6 JA–0.016 GA3 can predict and explain RLA. Principal component analysis (PCA), with the top 5 principal components for physiological and biochemical indicators and the top 2 principal components for disease-resistant genes, can explain 82.37% and 89.11% of their total variance, reducing the number of evaluation indicators. This study provides a basis for research on the mechanisms and breeding of sorghum with resistance to anthracnose. more...

This study delves into the role of gibberellin (GA) in governing plant branch development, a process that remains incompletely understood. Through a combination of exogenous hormone treatment, gene expression analysis, and transgenic phenotype investigations, the impact of GA on petunia’s branch development was explored. The results showed that GA3 alone did not directly induce axillary bud germination. However, paclobutrazol (PAC), an inhibitor of GA synthesis, effectively inhibited bud growth. Interestingly, the simultaneous application of GA3 and 6-BA significantly promoted bud growth in both intact and decapitated plants compared to using 6-BA alone. Moreover, this study observed a significant downregulation of GA synthesis genes, including GA20ox1, GA20ox2, GA20ox3, GA3ox1, and CPS1, alongside an upregulation of GA degradation genes such as GA2ox2, GA2ox4, and GA2ox8. The expression of GA signal transduction gene GID1 and GA response factor RGA was found to be upregulated. Notably, the PhGID1 gene, spanning 1029 bp and encoding 342 amino acids, exhibited higher expression in buds and the lowest expression in leaves. The overexpression of PhGID1 in Arabidopsis resulted in a noteworthy rise in the number of branches. This study highlights the crucial role of GA in bud germination and growth and the positive regulatory function of GA signaling in shoot branching processes. more...

F-box proteins play crucial roles in various developmental stages in plants, such as shoot branching. As an important ornamental and model plant, the branch development of petunia has always been a hot research topic. In our study, the homologous gene of SMALL LEAF AND BUSHY1 (SLB1) was isolated from Petunia ×hybrida cv. Mitchell Diploid. PhSLB1 contained a C-terminal WD40 repeat domain and an N-terminal F-box domain. An analysis of expression indicated that PhSLB exhibited the highest expression in roots, whereas expression levels were lowest in stems and leaves. Subcellular localization assays demonstrated that PhSLB1 was localized on the nucleus. Furthermore, RNA interference (RNAi) of PhSLB1 in petunia significantly increased the branch number. Quantitative real-time polymerase chain reaction showed that PhSLB1 not only regulated cytokinin and strigolactone pathway but also affected the expression of some key branching-related genes, such as PhBRC1, PhKNOX, PhH2A, and PhL27. Our research establishes a theoretical groundwork for revealing the mechanism by which SLB1 regulates branch development. more...

Osteoarthritis (OA) is a degenerative disease that affects the entire joint, with synovial inflammation being a major pathological feature. Macrophages, as the most abundant immune cells in the synovium, have an M1/M2 imbalance that is closely related to the occurrence and development of OA. Mesenchymal stem cells (MSCs) have been shown to effectively suppress inflammation in the treatment of OA, but they still pose issues such as immune rejection and tumorigenicity. The extracellular matrix (ECM), as a major mediator of MSCs' immunoregulatory effects, offers a cell-free therapy to circumvent these risks. In this study, we developed an ECM-functionalized hydrogel by combining MSC-derived ECM with gelatin methacryloyl (GelMA). To enhance the immunomodulatory potential of MSCs, we pre-stimulated MSCs with the inflammatory factor interleukin-6 (IL-6) present in OA. In vitro results showed that the ECM-functionalized hydrogel promoted M2 macrophage polarization and inhibited the expression of various inflammatory genes, strongly indicating the hydrogel's powerful immunoregulatory capabilities. In an in vivo rat OA model, the ECM-functionalized hydrogel significantly reduced synovial inflammation and cartilage matrix degradation, alleviating the progression of OA. Furthermore, we utilized proteomics and transcriptomics analysis to reveal that the hydrogel accomplished macrophage metabolic reprogramming by regulating mitochondrial function and energy metabolism, thereby reducing inflammation. These findings suggest that the ECM-functionalized hydrogel is a promising biomaterial-based strategy for treating OA by targeting key pathological mechanisms. more...

ABSTRACT Evagetes, with 18 species from China, is reviewed. One new species from Xinjiang, China, Evagetes truncantennus Dong & Ma, sp. nov. is described and illustrated. Ten newly recorded species from China are illustrated: E. transbaicalicus Lelej, 1995, E. subglaber (Haupt, 1941), E. iconionus Wolf, 1970, E. orientalis Lelej & Loktionov, 2009, E. crassicornis (Shuckard, 1837), E. dubius (Vander Linden, 1827), E. littoralis (Wesmael, 1851), E. pectinipes (Linnaeus, 1758), E. trispinosus (Kohl, 1886), E. proximus (Dahlbom, 1845), E. deirambo Ishikawa, 1960, E. liane Schmid-Egger, 2019 and E. shwangtashanus Yasumatsu, 1935, and 17 known species from China receive updated diagnoses. Additionally, a key to the Chinese species of Evagetes is provided. A few diagnostic morphological characters are found useful in species’ identifications, further enhancing the understanding of biodiversity within this genus. This study increased the number of known species of Evagetes, and expanded the known distribution of the genus to China. more...

Abstract Background Anemia is a common complication of tuberculosis (TB), and there is evidence that its prevalence is higher in patients with TB. Although TB is very important in epidemiology, careful investigation of TB-related anemia in children has not been carried out systematically. This study aimed to describe the details of anemia in children with TB and its association with clinical characteristics and the severity of inflammation. Methods In this retrospective study, we explored Hb levels in 103 children with pulmonary TB (PTB) and they were divided into anemic or non-anemic groups. Logistics regression analysis was used to study the associations between anemia and demographic characteristics. Spearman correlations analysis was performed to analyse the associations between the biochemical parameters and hemoglobin levels in blood. Results The prevalence of anemia in children with TB was 37.9% (48.7% showed microcytic hypochromic anemia, and 5.1% showed normal cell anemia). Compared with the anemia (n = 39) group, the non-anemic group (n = 64) had longer fever duration and increased respiratory rate (P more...

Porous carbon holds great potential for application in supercapacitors due to its rich pore structure and high specific surface area. In this research, lignin served as the starting material for the production of lignin-derived carbon materials via a carbonization-activation process. The resulting porous carbon materials underwent rigorous characterization using SEM, BET, Raman, XRD, and XPS to uncover their morphological and structural intricacies. Notably, the optimal product, achieved with a mass ratio of lignin to KOH and KCl at 1:2:0.5 and activation temperature at 700 °C, emerges as an excellent electrode material for high-performance supercapacitors. This superior carbon material boasts a remarkable specific surface area of 2730 m2 g−1, demonstrating an electrochemical capacitance up to 406 F/g at 1 A/g, its high performance surpasses many existing carbon materials. To further investigate the potential application of ELC in electric double-layer capacitors, the electrochemical properties of ELC in 6 M KOH, 1 M Na2SO4, and 1 M Et4NBF4/PC electrolytes were investigated, the reasons for the differences in ELC’s electrochemical performance in different electrolytes are discussed and analyzed in detail, and the advantages and disadvantages of ELC’s performance in capacitor devices of different systems are compared and analyzed. This was performed to compare the electrochemical performance of ELC and commercial YP-50F capacitor carbon in an electric double-layer capacitor, and to investigate the potential application of ELC. more...

Adjustment of Authorship Order [...]

There is an increased risk of complications and even surgical failures for various types of medical devices due to difficult to control configurations and performances, incomplete deployments, etc. Shape memory polymers (SMPs)-based 4D printing technology offers the opportunity to create dynamic, personalized, and accurately controllable biomedical devices with complex configurations. SMPs, typical representatives of intelligent materials, are capable of programmable deformation in response to stimuli and dynamic remodeling on demand. 4D printed SMP medical devices not only enable active control of configuration, performance and functionality, but also open the way for minimally invasive treatments and remote controllable deployment. Here, the shape memory mechanism, actuation methods, and printing strategies of active programmable SMPs are reviewed, and cutting-edge advances of 4D printed SMPs in the fields such as bone scaffolds, tracheal stents, cardiovascular stents, cell morphological regulation, and drug delivery are highlighted. In addition, promising and meaningful future research directions for 4D printed SMP biomedical devices are discussed. The development of 4D printed SMP medical devices is inseparable from the in-depth cooperation between doctors and engineers. The application of 4D printed SMP medical devices will facilitate the rapid realization of ‘smart medical care’ and accelerate the process of ‘intelligentization’ of medical devices. more...

Objective: The aim of this study was to investigate the epidemiological trend of respiratory pathogens infections among children after the Coronavirus Disease 2019 (COVID-19) pandemic. Methods: This study enrolled 575,373 children who came to our hospital for relevant respiratory pathogen antigen/antibody testing due to respiratory symptoms such as fever and cough. The demographic and laboratory data, including age, gender, testing time, and influenza A virus (IAV), influenza B virus (IBV), respiratory syncytial virus (RSV), adenovirus (ADV), and Mycoplasma pneumonia (MP) results, were collected from electronic medical records. SPSS (version 21.0) and GraphPad Prism 9 software were used for statistical analysis and figure creation. Results: 79,746 children tested positive for IAV IgM, and 3196 children tested positive for IBV IgM, with an overall positive rate of 28.5 % for IAV and 1.1 % for IBV. IAV infections peaked at 21,502 cases in March 2023. 80,699 children underwent RSV IgM testing from April to October 2023, with 5726 (7.1 %) testing positive. The apex of RSV infections occurred in May 2023, with 2140 cases. Regarding ADV, 100,460 children underwent testing from April to October 2023, with 1981 (11.9 %) testing positive. The pinnacle of ADV infections reached 4546 cases in November 2023. Concerning MP, 474,913 children underwent MP testing, with 73,833 (15.5 %) testing positive. The zenith of MP infections occurred in November 2023, with 25,291 cases. Further analysis revealed that the outbreaks of these pathogens are occurring earlier than in previous years. Additionally, our data showed that children aged >3 years accounted for 79.6 %, 87.8 %, 88.6 %, and 77.8 % of the total IAV‐positive, IBV‐positive, ADV-positive, and MP-positive children, respectively. Conversely, RSV primarily infected children more...

ABSTRACT To analyze the characteristics of Mycoplasma pneumoniae as well as macrolide antibiotic resistance through whole-genome sequencing and comparative genomics. Thirteen clinical strains isolated from 2003 to 2019 were selected, 10 of which were resistant to erythromycin (MIC >64 µg/mL), including 8 P1-type I and 2 P1-type II. Three were sensitive ( more...

Inspired by the extracellular matrix (ECM), biomaterials have emerged as promising strategies in the biomedical research and engineering domain, offering unique characteristics for tissue regeneration, drug delivery, therapeutic interventions, and cellular investigations. The ECM, a dynamic network structure secreted by various cells, primarily comprises diverse proteins capable of facilitating tissue-ECM signaling and regulatory functions through its rich array of bioactive substances and multi-level structural properties. Drawing inspiration from the intricate structure and biochemical composition of natural ECM, researchers have developed various biomaterials to encapsulate these features and create biomimetic microenvironments, such as electrospinning, hydrogels/hydrogel microspheres, decellularized ECM(dECM), and ECM-mimicking peptides. Furthermore, by mimicking the structural composition of ECM components, ECM-inspired biomaterials exhibit varying degrees of ECM functionalization, including providing structural support, cell adhesion, signal transduction, mitigating immune responses, and tissue remodeling. In summary, the advancements in ECM-inspired biomaterials offer significant promise in addressing key challenges in the fields of tissue engineering, regenerative medicine, and drug delivery. more...

The lack of a suitable rootstock to control scion growth has limited the development of high-density plantations in pear production, which is partly attributed to poor understanding of the dwarfing mechanism. In the present study, the rootstock of the dwarf-type pear (Pyrus betulaefolia) ‘PY-9’ was identified and used as the material for anatomical analysis. ‘PY-9’ grew to half the tree height of the normal cultivar ‘Zhengdu’, along with fewer internodes and shorter length. Significant differences in growth rate between ‘PY-9’ and ‘Zhengdu’ were detected at approximately 30 days after full bloom, which corresponded with the time of the greatest difference in water potential between the dwarf and normal cultivar. ‘PY-9’ showed a higher photosynthetic rate than ‘Zhengdu’. Anatomical analysis showed that ‘PY-9’ had higher area ratios of both phloem and xylem and more developed vascular tissues than ‘Zhengdu’. The three-dimensional reconstructed skeleton of the xylem from X-ray computed tomography scanning revealed greater intervessel connectivity in ‘Zhengdu’ than in ‘PY-9’, which could contribute to the more vigorous growth of ‘Zhengdu’. This study thus provides the first comparison of the microstructural properties of xylem elements between a dwarfing-type and vigorous-type pear rootstock, providing new insights into the dwarfing mechanism in pear and facilitating breeding of dwarf pear rootstocks to increase crop productivity. more...

As a crucial maritime search and rescue method, infrared object detection is critical in influencing the success rate. Research on infrared maritime images is limited, and the problems of smaller object sizes, more substantial noise, and less detailed information still need to be solved. To tackle these problems, we proposed an infrared maritime object detection network with feature enhancement and adjacent fusion. A spatial feature enhancement module and a semantic feature enhancement module are designed to enhance the location information of dim small targets and the deep semantic information, respectively. We designed a feature adjacent fusion network to fully use multiscale feature information. We built a maritime infrared dataset and compared the proposed method with existing advanced traditional and learning methods. The proposed method achieves better detection results. more...

Infrared object detection is one of the critical technologies for maritime search and rescue. However, it is still challenging due to the strong background clutter interference and the lack of small object information. We proposed a temporal-spatial pyramid network for infrared maritime object detection. We proposed a nested temporal pyramid to represent the temporal features through motion differences maps and energy accumulation maps to distinguish the wave clutter and objects. We proposed a dense spatial pyramid to learn the spatial features and the differences between temporal maps and then to clarify and locate objects. For training, we designed a scale-related composite loss function with correlated location description and weighted confidence loss. Finally, based on the ablation and comparison experiments, the proposed method performs better on maritime infrared sequences. more...

Utilizing lignin-derived activated carbon in supercapacitors has emerged as a promising approach to alleviating environmental pollution and promoting the high-value utilization of byproducts in the papermaking industry. In this study, activated carbons (LACs) were prepared using a simple one-step KOH activation approach and by employing enzymatic hydrolysis lignin (EHL). The impact of the KOH activation parameters on the microstructure and capacitive performance of the LACs was investigated by varying the KOH/EHL ratio and activation temperature. The optimized sample LAC800-4 showed an interconnected porous structure with a high surface area of 2285 m2/g, abundant micropores, and a small number of mesopores, which makes it a suitable electrode material for supercapacitors. The sample LAC800-4 demonstrated a high specific capacitance of 291.3 F/g in a three-electrode system. Under a symmetrical supercapacitor electrode system, the specific capacitance of the LAC800-4 electrode reached 186.8 F/g at 0.5 A/g. After 10,000 cycles at 20 A/g, the capacitance retention rate remained at 96.1%. The symmetrical supercapacitor also demonstrated a superior energy density of 6.5 Wh/kg. This work provides valuable insights into the transformation of low-value natural biomass derivatives into environmentally friendly, high-performing supercapacitor electrode materials. more...

Abstract Background The study describes the clinical manifestations and variant screening of two Chinese siblings with primary ciliary dyskinesia (PCD). They carry the same DNAAF2 genotype, which is an extremely rare PCD genotype in the Chinese population. In addition, the study illustrated an overview of published variants on DNAAF2 to date. Methods A two-child family was recruited for the study. Clinical manifestations, laboratory tests, bronchoscopic and otoscopic images, and radiographic data were collected. Whole blood was collected from siblings and their parents for whole-exome sequencing (WES) and Sanger sequencing to screen variants. Results The two siblings exhibited typical clinical manifestations of PCD. Two compound heterozygous variants in DNAAF2 were detected in both by WES. Nonsense variant c.156 C>A and frameshift variant c.177_178insA, which was a novel variant. Conclusion The study identified a novel variant of DNAAF2 in Chinese children with a typical phenotype of PCD, which may enrich our knowledge of the clinical, diagnostic and genetic information of DNAAF2-induced PCD in children. more...

The riparian green space covers the inner buffer zone to maintain the ecological characteristics of the river and the outer coordination green zone to serve the adjacent urban–rural functional areas. The complex topography and landform of mountainous areas make riparian green space closely connected with the natural process and spatial function, which is the focus of urban and rural construction. However, the “out-of-context” and “one-size-fits-all” means of multi-department planning have separated the natural process maintenance and constructive utilization of riparian green space in urban–rural areas, resulting in serious conflicts between protection and development and low control effectiveness. Under the background of prioritization of ecology and the control of urban–rural spatial resources in the whole region, we draw lessons from the theories and methods of related disciplines and takes the integration of protection and utilization as the basis point. We present a new conceptual framework that follows the natural ecological characteristics of rivers and appropriately integrates the demands of urban–rural development and construction, and discusses the differentiated planning and regulation method of riparian green space in mountainous urban–rural areas based on transect zoning. This conceptual framework not only ensures the healthy operation of the ecosystem inside the riparian zone, but also improves the composite service function outside the riparian zone, and minimizes the impact of urban–rural construction on the riparian zone. more...

Petunia hybrida is an economically important ornamental plant species. Branching in ornamental plants is closely associated with their ornamental traits, and branching is a significant agronomic trait in petunia, which shapes plant architecture and production cost. Although there are few studies regarding the involvement of the SPEAR genes in lateral branch development, they are known to regulate the development of plant organs. The PhSPEAR1 gene in petunia, an ortholog of Arabidopsis SPEAR1, was isolated for study. According to the results of real-time quantitative PCR (qRT-PCR), PhSPEAR1 was primarily expressed in the roots. The fluorescence signal indicated that PhSPEAR1 was localized in the nucleus and cytoplasm. An increase in PhSPEAR1 expression was induced by cytokinin or decapitation. Overexpression of PhSPEAR1 increased lateral branches in Arabidopsis. Based on our findings, PhSPEAR1 participates significantly in the regulation of branch number in petunia. more...

Background: The improvement rate and predictors of secondary mitral regurgitation in patients with aortic regurgitation undergoing transcatheter aortic valve replacement (TAVR) remain unclear. This study aimed to identify predictors of persistent moderate to severe secondary mitral regurgitation after TAVR in patients with aortic regurgitation by assessing mitral valve geometry with computed tomography (CT). Methods: This retrospective cohort study reviewed 242 consecutive patients with aortic regurgitation who underwent TAVR between May 2014 and December 2022. Patients with primary or less than moderate mitral regurgitation were excluded. Mitral annular dimensions (area, perimeter, anteroposterior, intercommissural, and trigone-to-trigone diameter), mitral valve tenting geometry (mitral valve tenting area [MVTA] and mitral valve tenting height [MVTH]), and papillary muscle displacement were systematically measured at CT. Mitral regurgitation improvement was assessed at 3 months after TAVR by echocardiography. Logistic regression was performed to explore the association of mitral valve geometry with mitral regurgitation improvement after TAVR. Results: A total of 75 patients (mean age, 74 ± 7 years; 32.0% female) with moderate to severe secondary mitral regurgitation were included in the final analysis. Mitral regurgitation improved in 49 patients and remained unchanged in 26 patients. Mitral annular dimensions, including area, perimeter, anteroposterior, and intercommissural diameter, were associated with mitral regurgitation improvement. MVTA and MVTH were risk factors for sustained mitral regurgitation. In addition, QRS duration >120 ms and atrial fibrillation had an impact on the mitral regurgitation improvement. Mitral annular area (odds ratio [OR], 1.41; 95% confidence interval [CI]: 1.05, 1.90; p = 0.02) and MVTA (OR, 7.24; 95% CI: 1.72, 30.44; p = 0.007) were independent predictors of persistent secondary mitral regurgitation after TAVR. Conclusions: Mitral annular area and MVTA were independent predictors of persistent secondary mitral regurgitation after TAVR. more...

Along with urbanization and industrialization, carbon emissions have been increasing significantly, resulting in global warming. Green space has been widely accepted as a natural element in cities to directly increase carbon sinks and indirectly reduce carbon emissions. The quantification of carbon benefits generated by green space is an important topic. This paper aims to provide a comprehensive review of the methods for measuring carbon sinks of green spaces. The results indicate that existing assessment methods can accurately estimate the carbon sinks in green spaces at large scales. However, existing methods are not fully applicable to studies of urban green spaces, due to the low precision of research results. The assimilation method is the most suitable method to study the carbon sequestration efficiency of plants and can project the carbon sinks of urban green spaces at large scales through macroscopic means. Even though, the results of assimilation experiments are unstable under different weather conditions. To address existing research challenges, this paper proposes a photosynthetic rate estimation method based on the light-response curve which is an efficient method to describe the relationship between light intensity and net photosynthetic rate in studying plant physiological characteristics. The newly proposed method, through integrating net photosynthesis-light response curves and urban light intensity associated with meteorological data, has advantages of short measurement time and ensuring standardized experimental environment for result comparability. Overall, this study is important to combine meteorology and plant physiology to propose a photosynthetic rate estimation method for optimizing carbon sink measurement in urban green spaces. The method is more convenient for application for its simple experimental process and result comparability. In practice, this study provides guidance for low-carbon urban green space planning and design, and helps to promote energy conservation and emission reduction through nature-based solutions. more...

BackgroundThe body of evidence supporting the beneficial effects of Tai Chi in reducing anxiety and depressive symptoms in older adults is steadily increasing. Nonetheless, there remains a scarcity of studies directly comparing the clinical effectiveness of various Tai Chi exercises in addressing anxiety and depressive symptoms in older adults. Thus, this study aimed to systematically review and analyze the therapeutic efficacy of four types of Tai Chi interventions in enhancing anxiety and depressive symptoms in older adults.MethodsDuring the period up to July 26, 2023, searches were conducted in the Web of Science, PubMed, the Cochrane Library, CNKI, and the Chinese Scientific Journal Database (VIP). The language scope encompassed both English and Chinese. Two independent reviewers conducted the literature review and data extraction. Review Manager 5.4 was employed for traditional meta-analysis and risk assessment, while version 15 of STATA software was used for generating evidence and funnel plots for network meta-analysis. This study was registered in PROSPERO number CRD 42023442270.ResultIn this analysis, a total of 20 studies were included, involving 1798 participants. The findings of the pairwise meta-analysis revealed that Tai Chi intervention was more effective than the control group in reducing anxiety (SMD: −1.19, 95% CI: −2.04, −0.34, p more...

Macrophages (Mφs) play a crucial role in the pathological progression of osteoarthritis (OA) by regulating inflammation and tissue repair. Decreasing pro-inflammatory M1-Mφs and increasing anti-inflammatory M2-Mφs can alleviate OA-related inflammation and promote cartilage repair. Apoptosis is a natural process associated with tissue repair. A large number of apoptotic bodies (ABs), a type of extracellular vesicle, are produced during apoptosis, and this is associated with a reduction in inflammation. However, the functions of apoptotic bodies remain largely unknown. In this study, we investigated the role of M2-Mφs-derived apoptotic bodies (M2-ABs) in regulating the M1/M2 balance of macrophages in a mouse model of OA. Our data show that M2-ABs can be targeted for uptake by M1-Mφs, and this reprograms M1-to-M2 phenotypes within 24 h. The M2-ABs significantly ameliorated the severity of OA, alleviated the M1-mediated pro-inflammatory environment, and inhibited chondrocyte apoptosis in mice. RNA-seq revealed that M2-ABs were enriched with miR-21–5p, a microRNA that is negatively correlated with articular cartilage degeneration. Inhibiting the function of miR-21–5p in M1-Mφs significantly reduced M2-ABs-guided M1-to-M2 reprogramming following in vitro cell transfection. Together, these results suggest that M2-derived apoptotic bodies can prevent articular cartilage damage and improve gait abnormalities in OA mice by reversing the inflammatory response caused by M1 macrophages. The mechanism underlying these findings may be related to miR-21-5p-regulated inhibition of inflammatory factors. The application of M2-ABs may represent a novel cell therapy, and could provide a valuable strategy for the treatment of OA and/or chronic inflammation. more...

Abstract Background Sunflower is an important ornamental plant, which can be used for fresh cut flowers and potted plants. Plant architecture regulation is an important agronomic operation in its cultivation and production. As an important aspect of plant architecture formation, shoot branching has become an important research direction of sunflower. Results TEOSINTE-BRANCHED1/CYCLOIDEA/PCF (TCP) transcription factors are essential in regulating various development process. However, the role of TCPs in sunflowers has not yet been studied. This study, 34 HaTCP genes were identified and classified into three subfamilies based on the conservative domain and phylogenetic analysis. Most of the HaTCPs in the same subfamily displayed similar gene and motif structures. Promoter sequence analysis has demonstrated the presence of multiple stress and hormone-related cis-elements in the HaTCP family. Expression patterns of HaTCPs revealed several HaTCP genes expressed highest in buds and could respond to decapitation. Subcellular localization analysis showed that HaTCP1 was located in the nucleus. Paclobutrazol (PAC) and 1-naphthylphthalamic acid (NPA) administration significantly delayed the formation of axillary buds after decapitation, and this suppression was partially accomplished by enhancing the expression of HaTCP1. Furthermore, HaTCP1 overexpressed in Arabidopsis caused a significant decrease in branch number, indicating that HaTCP1 played a key role in negatively regulating sunflower branching. Conclusions This study not only provided the systematic analysis for the HaTCP members, including classification, conserved domain and gene structure, expansion pattern of different tissues or after decapitation. But also studied the expression, subcellular localization and function of HaTCP1. These findings could lay a critical foundation for further exploring the functions of HaTCPs. more...

Infrared small maritime target detection under strong ocean waves, a challenging task, plays a key role in maritime distress target search and rescue applications. Many methods based on directionality or gradient properties have proven to perform well for infrared images with heterogeneous scenarios. However, they tend to perform poorly when facing strong ocean wave background, mainly due to the following: 1) infrared images have low signal-to-clutter ratio with low intensity for small targets; 2) some waves have high local contrast that may be similar to or higher than targets. To solve these issues, a new method based on gradient vector field characterization (GVFC) of infrared images is proposed. First, we construct the gradient vector field and coarsely extract suspected targets. Then, gradient vector distribution measure (GVDM) is presented, which comprehensively integrates a synergistic homogeneity test based on Kolmogorov–Smirnov test with absolute difference standard deviation for gradient direction angle and regression analysis for gradient modulus. The proposed GVDM takes advantage of pixel-level gradient distribution property to further filtrate refined suspected targets. Moreover, gradient modulus horizontal local dissimilarity is proposed to measure the diversity of gradient modulus in horizontal direction between targets and waves, so as to enhance target saliency and suppress residual clutter simultaneously, which achieves preferable performance. Finally, a simple adaptive threshold is applied to confirm targets. Extensive experiments implemented on infrared maritime images with strong ocean waves demonstrate that the proposed method is superior to the state-of-the-art methods with respect to robustness and detection accuracy. more...

High-precision infrared maritime target detection plays an important role in early warning, monitoring, search, and rescue. The methods of decomposing the original image into low-rank background components and sparse target components show favorable detection performance. However, the strong edge interference is also sparse and may be mistakenly taken as target components, resulting in a large number of false alarms and reducing detection accuracy. To solve the problem, we propose an iterative corner and edge weights method based on tensor decomposition. The original image is decomposed into the background component, target component, and additional strong edge interference component. The corner strength is designed as the weight of the target component, and the edge strength is designed as the weight of the interference component in order to separate the target and interference more accurately. And the two weights are designed to be updated during each iteration of the model solution to reduce the impact of initial imprecise weights on detection results. Compared with 8 advanced baseline methods in 10 datasets, the proposed method demonstrates outstanding results and shows engineering application prospects. more...

BackgroundAnxiety and depression pose a significant global health challenge for elderly individuals. Research has demonstrated the potential of traditional Chinese medicine (TCM) exercise therapies in alleviating these conditions. However, ongoing debate and uncertainty persist regarding the optimal therapy and its impact on anxiety and depression. This study aims to evaluate and prioritize TCM exercise therapies for anxiety and depression in older adults, to identify the most effective intervention, and to provide a basis for informed decision-making in clinical practice.MethodsWe conducted a comprehensive search of electronic databases including The Web of Science, PubMed, the Cochrane Library, China National Knowledge Infrastructure (CNKI), Wang Fang, and Wei Pu database up to July 2022. Two researchers independently reviewed all included studies and extracted relevant data. Traditional meta-analysis was performed using Review Manager version 5.4, while network meta-analysis was conducted using STATA software version 15.1 to generate network evidence plots and funnel plots.ResultA total of 30 trials, involving 2,806 participants, met the eligibility criteria. The traditional meta-analysis revealed that TCM exercise significantly improved anxiety (SMD = −0.82, 95% CI = −1.39, −0.26, p = 0.004) and depression (SMD = −0.63, 95% CI = −0.85, −0.41, p more...

The branch number of plants is an important agronomic trait that directly influences the ornamental characters and production costs of ornamental plants. Shoot branching has always been a hot topic for Petunia hybrida. During our research, we isolated the homologous gene of narrow-leaf 1 (NAL1), denoted as PhNAL1. The expression level of PhNAL1 was higher in leaves and axils than in roots, stems, and flowers. Pertinent to shoot apex removal and 6-benzyladenine treatments, both interventions demonstrated a suppressive effect on the expression of PhNAL1. Through subcellular localization analysis, we found that PhNAL1 predominantly localized in the nucleus. By using RNA interference targeting PhNAL1, we induced a noticeable increase in branch number while concurrently reducing plant height of petunia. These findings demonstrate that PhNAL1 is involved in regulating branch development within petunia. This study provides genetic resources for the subsequent cultivation of new cultivars of petunia endowed with distinct branching characteristics. more...

Avermectins, a fermentation-derived macrocyclic lactones isolated from Streptomyces avermitilis, exhibiting a long history as biopharmaceuticals used in agriculture, medical and veterinary fields. Due to the significant biological activity and low mammalian toxicity, avermectins have been recognized as one of the most market-competitive anthelmintics and insecticides, with research related to these compounds has been awarded the 2015 Nobel Prize in Physiology or Medicine. Avermectin molecules contain multiple reaction sites, such as carbon-carbon double bonds, hydroxyl groups and oleandrose, facilitating the further development of derivatives with improved physicochemical properties, bioavailability, pest spectrum, and efficacy by chemical modification. Presently, thousands of avermectin derivatives have been studied and various species have been commercialized for crop protection and pharmaceutical use. Herein, we review the research progress achieved on structural modification reactions of avermectin and further summarize their structure-activity relationships. This mini-review may provide important insights into the future development of efficient avermectin-based anthelmintics, fungicides, and insecticides. more...

Abstract Background Nitrogen (N) deposition alters litter decomposition and soil carbon (C) sequestration by influencing the microbial community and its enzyme activity. Natural atmospheric N deposition comprises of inorganic N (IN) and organic N (ON) compounds. However, most studies have focused on IN and its effect on soil C cycling, whereas the effect of ON on microbial enzyme activity is poorly understood. Here we studied the effects of different forms of externally supplied N on soil enzyme activities related to decomposition in a temperate steppe. Ammonium nitrate was chosen as IN source, whereas urea and glycine were chosen as ON sources. Different ratios of IN to ON (Control, 10:0, 7:3, 5:5, 3:7, and 0:10) were mixed with equal total amounts of N and then used to fertilize the grassland soils for 6 years. Results Our results show that IN deposition inhibited lignin-degrading enzyme activity, such as phenol oxidase (POX) and peroxidase (PER), which may restrain decomposition and thus induce accumulation of recalcitrant organic C in grassland soils. By contrast, deposition of ON and mixed ON and IN enhanced most of the C-degrading enzyme activities, which may promote the organic matter decomposition in grassland soils. In addition, the β-N-acetyl-glucosaminidase (NAG) activity was remarkably stimulated by fertilization with both IN and ON, maybe because of the elevated N availability and the lack of N limitation after long-term N fertilization at the grassland site. Meanwhile, differences in soil pH, soil dissolved organic carbon (DOC), and microbial biomass partially explained the differential effects on soil enzyme activity under different forms of N treatments. Conclusions Our results emphasize the importance of organic N deposition in controlling soil processes, which are regulated by microbial enzyme activities, and may consequently change the ecological effect of N deposition. Thus, more ON deposition may promote the decomposition of soil organic matter thus converting C sequestration in grassland soils into a C source. more...

Residual stresses are the stresses that retain inside the part after removal of loads. These stresses are known to substantially affect performance of a part in terms of service life and response to various kinds of loads. Determination of these stresses has been a challenging issue. Especially in novel Incremental Sheet Forming (ISF) process, no analytical approach has been applied to evaluate these stresses. This study presents an approach to evaluate residual stresses in the ISF parts. The distribution of residual stresses was determined and verified for rotational parts. It was found that the magnitude of stresses reduces as the radius and height of part increases. Further, this happens in a non-linear fashion. Also, the stresses are compressive in nature on the inner surface of part that will derive the improvement of fatigue life of the deformed parts. more...

Plant-parasitic nematodes are a main limiting factor for worldwide agriculture. To reduce the global burden of nematode infections, chemical nematicides are still the most effective methods to manage nematodes. With the increasing resistance of nematodes, the development of new anti-nematicides drug is urgent. Nematode chitinases are found to play important roles in various physiological functions, such as larva moulting, hatching from eggshell, and host infection. Inhibition of nematode chitinase is considered a promising strategy for the development of eco-friendly nematicides. In this study, to develop novel nematode chitinase CeCht1 inhibitors, virtual screening of the ZINC database was performed using the pesticide-likeness rules, pharmacophore-based and docking-based approach in turn. Compounds HAU-4 and HAU-7 were identified as potent CeCht1 inhibitors with the IC50 values of 4.2 μM and 10.0 μM, respectively. Moreover, molecular dynamics simulations combined with binding free energy and free energy decomposition calculations were conducted to investigate the basis for the potency of the two inhibitors toward CeCht1. This work gives an insight into the future rational development of novel and potent nematode chitinase inhibitors. more...

Probability of target attainment is the key factor influencing the outcome of meropenem therapy. The objective of the present study was to evaluate the relationship between the time in which the plasma free concentration of meropenem exceeds the minimum inhibitory concentration of pathogens (fT>MIC) during therapy and the clinical outcome of treatment to optimize meropenem therapy. Critically ill children with infections who had received intravenous meropenem monotherapy were included. The relationship between fT>MIC of meropenem and effectiveness and safety were explored. Data from 53 children (mean age ± standard deviation, 26 months ± 38) were available for final analysis. Children with fT>MIC ≥ 5.6 h (n = 14) had a more significant improvement in antibacterial efficacy in terms of decrease in fever (p = 0.02), white blood cell count (p = 0.014), and C-reactive protein (p = 0.02) compared with children with fT>MIC < 5.6 h (n = 39) after meropenem therapy completed. No drug-related adverse events were shown to have a causal association with meropenem therapy. Our study shows the clinical benefits of sufficient target attainment of meropenem therapy. Meeting a suitable pharmacodynamic target attainment of meropenem is required to ensure better antibacterial efficacy in critically ill infants and children.Clinical Trial Registration:clinicaltrials.gov, Identifier NCT03643497. more...

The implantation of synthetic polymeric scaffolds induced foreign-body reaction (FBR) seriously influence the wound healing and impair functionality recovery. A novel short peptide, mechano-growth factor (MGF), was introduced in this study to modify an electrospun polycaprolactone (PCL) fibrous scaffold to direct the macrophage phenotype transition and mitigate the FBR. In vitro studies discovered the cell signal transduction mechanism of MGF regulates the macrophage polarization via the expression of related genes and proteins. We found that macrophages response the MGF stimuli via endocytosis, then MGF promotes the histone acetylation and upregulates the STAT6 expression to direct an anti-inflammatory phenotype transition. Subsequently, an immunoregulatory electrospun PCL fibrous scaffold was modified by silk fibroin (SF) single-component layer-by-layer assembly, and the SF was decorated with MGF via click chemistry. Macrophages seeded on scaffold to identify the function of MGF modified scaffold in directing macrophage polarization in vitro. Parallelly, rat subcutaneous implantation model and rat tendon adhesion model were performed to detect the immunomodulatory ability of the MGF-modified scaffold in vivo. The results demonstrate that MGF-modified scaffold is beneficial to the transformation of macrophages to M2 phenotype in vitro. More importantly, MGF-functionalized scaffold can inhibit the FBR at the subcutaneous tissue and prevent tissue adhesion. more...

Human cytomegalovirus (HCMV) is the prototypical member of the β-herpesvirinae subfamily and the leading viral cause of congenital infections that can lead to birth defects and it can also cause life-threatening disease in immunocompromised individuals. Here, the authors present the in-situ cryo-EM structures of the symmetry-mismatched portal and the capsid vertex-specific components (CVSCs) of HCMV and discuss the mechanistic implications for genome package, retention and ejection. more...

Climate change led by excessive carbon dioxide (CO2) emissions poses a global challenge [...]

Myelodysplastic syndromes (MDS) are age-related myeloid neoplasms with increased risk of progression to acute myeloid leukemia (AML). The mechanisms of transformation of MDS to AML are poorly understood, especially in relation to the aging microenvironment. We previously established an mDia1/miR-146a double knockout (DKO) mouse model phenocopying MDS. These mice develop age-related pancytopenia with oversecretion of proinflammatory cytokines. Here, we found that most of the DKO mice underwent leukemic transformation at 12–14 months of age. These mice showed myeloblast replacement of fibrotic bone marrow and widespread leukemic infiltration. Strikingly, depletion of IL-6 in these mice largely rescued the leukemic transformation and markedly extended survival. Single-cell RNA sequencing analyses revealed that DKO leukemic mice had increased monocytic blasts that were reduced with IL-6 knockout. We further revealed that the levels of surface and soluble IL-6 receptor (IL-6R) in the bone marrow were significantly increased in high-risk MDS patients. Similarly, IL-6R was also highly expressed in older DKO mice. Blocking of IL-6 signaling significantly ameliorated AML progression in the DKO model and clonogenicity of CD34-positive cells from MDS patients. Our study establishes a mouse model of progression of age-related MDS to AML and indicates the clinical significance of targeting IL-6 signaling in treating high-risk MDS. more...

With the rapid increase in the number of infections, children with Staphylococcus aureus (S. aureus) infection secondary to Influenza A virus (IAV), appear to have a great possibility of causing severe complications and illness. Despite some cases and research findings regarding the death of children with IAV and S. aureus, coinfection included, there were few details about successful treatment of pleural empyema and necrotizing pneumonia caused by methicillin-resistant Staphylococcus aureus (MRSA) infection following IAV. In this case report, we describe the clinical symptoms and treatment of a teenager with pleural empyema and necrotizing pneumonia related to S. aureus secondary infection who was initially infected by IAV. This case highlights the importance of early recognition and application of thoracoscopy for this potentially fatal pleural empyema caused by MRSA and IAV coinfection. We conclude that this is a significant case that contributes to raising awareness regarding rarely occurring severe respiratory infections by MRSA in a child with normal immune function after IAV. In addition, further studies are needed to explore risk factors for IAV coinfection with S. aureus. more...

Background: Pressure-strain loop (PSL) analysis provides a novel, less load-dependent non-invasive method to quantify myocardial work and demonstrates a significant correlation with the contractile reserve in adult athletes. We aim to validate PSL-derived markers in characterizing LV function in pre-adolescent basketball players by comparing results before and after the cardiopulmonary exercise test (CPX) and explore its association with CPX-derived aerobic capacity.Methods: Cardiac morphology and function in 20 pre-adolescent basketball players were assessed at 9.7 years old (9.7 ± 1.1 year) before and after cardiopulmonary exercise testing. Echocardiography was performed in all subjects, including two-dimensional speckle-tracking echocardiography (STE). Simultaneous brachial-cuff-measured blood pressure was recorded to perform PSL analysis.Results: Nineteen subjects were included in the final analysis. Exercise training in pre-adolescent males was associated with lower global work index (GWI) and global work efficiency (GWE) at rest. GWE at stress was significantly correlated with VO2max and peak O2 pulse (p = 0.0122, r = 0.56; p = 0.00122, r = 0.69, respectively). When indexed by body mass, GWI and GWE both significantly correlated with relative VO2max (p = 0.0086 and 0.0011 respectively, r = 0.58 and 0.69 respectively); GWI and GWE at baseline and stress were all significantly correlated with peak O2 pulse (GWI at baseline, p< 0.0001, r = −0.90; GWE at baseline, p< 0.0001, r = −0.89; GWI at stress, p= 0.0289, r = −0.50; GWE at stress, p< 0.0001, r = −0.83).Conclusion: PSL-analysis-derived GWI and GWE at rest indexed by body mass are associated with cardiopulmonary exercise test-derived peak oxygen consumption and oxygen pulse in pre-adolescent athletes. more...

Polylactic acid (PLA) is a kind of green and environmentally friendly polymer material with good thermal processing and mechanical properties and biodegradability. However, the properties of poor heat resistance, hardness, and brittleness greatly limit the applications of PLA related materials. In this study, a series of PLA/TA composite films composed of PLA and tannic acid (TA) with different TA contents were prepared. X-ray diffractometry, FTIR spectrometry, thermal gravimetric analysis, electromechanical universal testing, and ultraviolet-visible spectrophotometry were used to characterize the properties of the composite materials. The results show that the strong hydrogen bonding between PLA polymer chains and TA molecules is formed, which greatly improves the heat resistance and mechanical properties of the obtained composite films. In addition, the composite materials possess strong UV shielding function owing to the polyphenol structure of TA, which has potential application prospects in the field of packaging materials. more...

It has always been a serious challenge to efficiently detect infrared targets from remote sea-sky background without any prior knowledge. This is especially true when target features of different areas are irrelevant in the same image. The main contribution of this paper is to design an algorithm of judge sea-sky condition and detect infrared target, in which a two-direction local maximum (TLM) method and peak local singularity (PLS) is proposed, constant excitatory difference of Gaussians (CEDoG) operator is applied by analyzing the characteristics of the target. First and foremost, the TLM method is adopted to refine seasky area to extract the suspected sea-sky line, and design the strategy of “de-false”to realize the accurate determination of the sea-sky line. Secondly, small targets in the sea-sky area (pixels 2 × 2 to 9 × 9) are detected by applying the PLS method. Finally, CEDoG filtering method is used to suppress the background and improve the significance of the target, and high threshold OTSU method (H-OTSU) is applied to find the most significant area and self-designed area growth rule to ensure the accuracy and integrity of the maritime area target detection. Comparing with the other state-of-the-art methods in the experiments, our strategy has a robust and effective performance in terms of recall, precision, elapsed time, complexity, detection and false alarm rate. more...