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1.
Opt Express ; 32(2): 1275-1285, 2024 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-38297682

RESUMO

In this study, we fabricated and characterized various parallel flip-chip AlGaN-based deep-ultraviolet (DUV) micro-ring LEDs, including changes in ring dimensions as well as the p-GaN-removed region widths at the outer micro-ring, respectively (PRM LEDs). It is revealed that the LED chips with smaller mesa withstand higher current density and deliver considerably higher light output power density (LOPD), under the same proportion of the hole to the entire mesa column (before it is etched into ring) within the limits of dimensions. However, as the ring-shaped mesa decreases, the LOPD begins to decline because of etching damage. Subsequently, at the same external diameter, the optical performance of micro-ring LEDs with varied internal diameters is studied. Meanwhile, the influence of different structures on light extraction efficiency (LEE) is studied by employing a two-dimensional (2D)-finite-difference time-domain (FDTD) method. In addition, the expand of the p-GaN-removed region at the outer micro-ring as well as the corresponding effective light emission region have some influence to LOPD. The PRM-23 LED (with an external diameter of 90 µm, an internal diameter of 22 µm, and a p-GaN-removed region width of 8 µm) has an LOPD of 53.36 W/cm2 with a current density of 650 A/cm2, and an external quantum efficiency (EQE) of 6.17% at 5 A/cm2. These experimental observations provide a comprehensive understanding of the optical and electrical performance of DUV micro-LEDs for future applications.

2.
BMC Cancer ; 24(1): 681, 2024 Jun 04.
Artigo em Inglês | MEDLINE | ID: mdl-38834966

RESUMO

BACKGROUND: Our previous studies have indicated that mRNA and protein levels of PPIH are significantly upregulated in Hepatocellular Carcinoma (LIHC) and could act as predictive biomarkers for patients with LIHC. Nonetheless, the expression and implications of PPIH in the etiology and progression of common solid tumors have yet to be explored, including its potential as a serum tumor marker. METHODS: We employed bioinformatics analyses, augmented with clinical sample evaluations, to investigate the mRNA and protein expression and gene regulation networks of PPIH in various solid tumors. We also assessed the association between PPIH expression and overall survival (OS) in cancer patients using Kaplan-Meier analysis with TCGA database information. Furthermore, we evaluated the feasibility and diagnostic efficacy of PPIH as a serum marker by integrating serological studies with established clinical tumor markers. RESULTS: Through pan-cancer analysis, we found that the expression levels of PPIH mRNA in multiple tumors were significantly different from those in normal tissues. This study is the first to report that PPIH mRNA and protein levels are markedly elevated in LIHC, Colon adenocarcinoma (COAD), and Breast cancer (BC), and are associated with a worse prognosis in these cancer patients. Conversely, serum PPIH levels are decreased in patients with these tumors (LIHC, COAD, BC, gastric cancer), and when combined with traditional tumor markers, offer enhanced sensitivity and specificity for diagnosis. CONCLUSION: Our findings propose that PPIH may serve as a valuable predictive biomarker in tumor patients, and its secreted protein could be a potential serum marker, providing insights into the role of PPIH in cancer development and progression.


Assuntos
Biomarcadores Tumorais , Humanos , Biomarcadores Tumorais/sangue , Biomarcadores Tumorais/genética , Prognóstico , Feminino , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/sangue , Neoplasias Hepáticas/mortalidade , Regulação Neoplásica da Expressão Gênica , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/sangue , Carcinoma Hepatocelular/mortalidade , Carcinoma Hepatocelular/patologia , Carcinoma Hepatocelular/diagnóstico , Neoplasias/genética , Neoplasias/sangue , Neoplasias/mortalidade , Neoplasias/diagnóstico , Masculino , Biologia Computacional/métodos , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Estimativa de Kaplan-Meier , Neoplasias da Mama/genética , Neoplasias da Mama/sangue , Neoplasias da Mama/mortalidade , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/patologia , Neoplasias Gástricas/genética , Neoplasias Gástricas/sangue , Neoplasias Gástricas/diagnóstico , Neoplasias Gástricas/mortalidade , Neoplasias Gástricas/patologia , Neoplasias do Colo/genética , Neoplasias do Colo/sangue , Neoplasias do Colo/diagnóstico , Neoplasias do Colo/patologia , Neoplasias do Colo/mortalidade , Redes Reguladoras de Genes
3.
Appl Opt ; 63(11): 2815-2821, 2024 Apr 10.
Artigo em Inglês | MEDLINE | ID: mdl-38856376

RESUMO

The inverted metamorphic multi-junction solar cell is anticipated to be widely applied in stratospheric flight because of its exceptional properties of flexibility and light weight. We propose an ipsilateral welding technology based on Ti/Au electrodes to simplify the fabrication process of GaInP/GaAs/InGaAs solar cells and encapsulate large-sized flexible solar cells. After annealing at 200°C for 2 h, the Ti/Au electrode achieved a low specific contact resistivity of 2.9×10-7 Ω⋅c m 2. The performance of the ohmic contact remains stable after the thermal cycling tests. The Ti/Au electrode can require less heat input for welding to reduce the risk of microcrack formation of the solar cells. By employment of this electrode, a 24c m 2 solar cell achieved a conversion efficiency of 34.74%. A flexible solar cell module with an efficiency of 32.82% under AM 1.5G illumination was obtained by the ipsilateral electrode welding technology.

4.
Appl Opt ; 63(15): 4067, 2024 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-38856499

RESUMO

This erratum corrects an error in Fig. 1 of the original paper, Appl. Opt.63, 2815 (2024)APOPAI0003-693510.1364/AO.518102.

5.
Hepatobiliary Pancreat Dis Int ; 23(3): 234-240, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38326157

RESUMO

Mirizzi syndrome is a serious complication of gallstone disease. It is caused by the impacted stones in the gallbladder neck or cystic duct. One of the features of Mirizzi syndrome is severe inflammation or dense fibrosis at the Calot's triangle. In our clinical practice, bile duct, branches of right hepatic artery and right portal vein clinging to gallbladder infundibulum are often observed due to gallbladder infundibulum adhered to right hepatic hilum. The intraoperative damage of branches of right hepatic artery occurs more easily than that of bile duct, all of which are hidden pitfalls for surgeons. Magnetic resonance cholangiopancreatography (MRCP) and endoscopic retrograde cholangiopancreatography (ERCP) are the preferable tools for the diagnosis of Mirizzi syndrome. Anterograde cholecystectomy in Mirizzi syndrome is easy to damage branches of right hepatic artery and bile duct due to gallbladder infundibulum adhered to right hepatic hilum. Subtotal cholecystectomy is an easy, safe and definitive approach to Mirizzi syndrome. When combined with the application of ERCP, a laparoscopic management of Mirizzi syndrome by well-trained surgeons is feasible and safe. The objective of this review was to highlight its existing problems: (1) low preoperative diagnostic rate, (2) easy to damage bile duct and branches of right hepatic artery, and (3) high concomitant gallbladder carcinoma. Meanwhile, the review aimed to discuss the possible therapeutic strategies: (1) to enhance its preoperative recognition by imaging findings, and (2) to avoid potential pitfalls during surgery.


Assuntos
Colelitíase , Síndrome de Mirizzi , Humanos , Síndrome de Mirizzi/diagnóstico por imagem , Síndrome de Mirizzi/cirurgia , Colangiopancreatografia Retrógrada Endoscópica , Colelitíase/cirurgia , Colecistectomia , Ductos Biliares
6.
Int J Mol Sci ; 25(11)2024 Jun 03.
Artigo em Inglês | MEDLINE | ID: mdl-38892343

RESUMO

Nanogenerators possess the capability to harvest faint energy from the environment. Among them, thermoelectric (TE), triboelectric, piezoelectric (PE), and moisture-enabled nanogenerators represent promising approaches to micro-nano energy collection. These nanogenerators have seen considerable progress in material optimization and structural design. Printing technology has facilitated the large-scale manufacturing of nanogenerators. Although inks can be compatible with most traditional functional materials, this inevitably leads to a decrease in the electrical performance of the materials, necessitating control over the rheological properties of the inks. Furthermore, printing technology offers increased structural design flexibility. This review provides a comprehensive framework for ink-based nanogenerators, encompassing ink material optimization and device structural design, including improvements in ink performance, control of rheological properties, and efficient energy harvesting structures. Additionally, it highlights ink-based nanogenerators that incorporate textile technology and hybrid energy technologies, reviewing their latest advancements in energy collection and self-powered sensing. The discussion also addresses the main challenges faced and future directions for development.


Assuntos
Tinta , Nanotecnologia , Nanotecnologia/métodos , Fontes de Energia Elétrica , Reologia , Impressão/métodos
7.
J Hepatol ; 79(2): 394-402, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37086919

RESUMO

BACKGROUND & AIMS: Ischemia-reperfusion injury (IRI) has thus far been considered as an inevitable component of organ transplantation, compromising outcomes, and limiting organ availability. Ischemia-free organ transplantation is a novel approach designed to avoid IRI, with the potential to improve outcomes. METHODS: In this randomized-controlled clinical trial, recipients of livers from donors after brain death were randomly assigned to receive either an ischemia-free or a 'conventional' transplant. The primary endpoint was the incidence of early allograft dysfunction. Secondary endpoints included complications related to graft IRI. RESULTS: Out of 68 randomized patients, 65 underwent transplants and were included in the analysis. 32 patients received ischemia-free liver transplantation (IFLT), and 33 received conventional liver transplantation (CLT). Early allograft dysfunction occurred in two recipients (6%) randomized to IFLT and in eight (24%) randomized to CLT (difference -18%; 95% CI -35% to -1%; p = 0.044). Post-reperfusion syndrome occurred in three recipients (9%) randomized to IFLT and in 21 (64%) randomized to CLT (difference -54%; 95% CI -74% to -35%; p <0.001). Non-anastomotic biliary strictures diagnosed with protocol magnetic resonance cholangiopancreatography at 12 months were observed in two recipients (8%) randomized to IFLT and in nine (36%) randomized to CLT (difference, -28%; 95% CI -50% to -7%; p = 0.014). The comprehensive complication index at 1 year after transplantation was 30.48 (95% CI 23.25-37.71) in the IFLT group vs. 42.14 (95% CI 35.01-49.26) in the CLT group (difference -11.66; 95% CI -21.81 to -1.51; p = 0.025). CONCLUSIONS: Among patients with end-stage liver disease, IFLT significantly reduced complications related to IRI compared to a conventional approach. CLINICAL TRIAL REGISTRATION: chictr.org. ChiCTR1900021158. IMPACT AND IMPLICATIONS: Ischemia-reperfusion injury has thus far been considered as an inevitable event in organ transplantation, compromising outcomes and limiting organ availability. Ischemia-free liver transplantation is a novel approach of transplanting donor livers without interruption of blood supply. We showed that in patients with end-stage liver disease, ischemia-free liver transplantation, compared with a conventional approach, led to reduced complications related to ischemia-reperfusion injury in this randomized trial. This new approach is expected to change the current practice in organ transplantation, improving transplant outcomes, increasing organ utilization, while providing a clinical model to delineate the impact of organ injury on alloimmunity.


Assuntos
Doença Hepática Terminal , Transplante de Fígado , Traumatismo por Reperfusão , Humanos , Transplante de Fígado/efeitos adversos , Transplante de Fígado/métodos , Doença Hepática Terminal/complicações , Isquemia/patologia , Fígado/patologia , Traumatismo por Reperfusão/etiologia , Traumatismo por Reperfusão/prevenção & controle , Traumatismo por Reperfusão/patologia , Perfusão/métodos , Preservação de Órgãos/métodos
8.
Liver Transpl ; 29(6): 598-606, 2023 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-36747346

RESUMO

Immune checkpoint inhibitors (ICIs) may lead to rejection and even graft loss of solid organ transplant recipients, making them not widely used in transplant patients. There is insufficient clinical experience in using ICIs as a bridging or downstaging therapy before transplantation. We performed a retrospective review of patients receiving programmed cell death 1 inhibitor (PD1) before liver transplantation for HCC in our center and analyzed the data of these patients with the purpose of investigating the safety and feasibility of preoperative PD1 inhibitor among liver transplant recipients and exploring the preoperative correlation ICIs and the postoperative risk of rejection and immune-related graft loss. A total of 16 patients enrolled in this study. Acute rejection occurred in 9 patients, with an incidence of 56.3%. The median time of rejection was 7 days after surgery. The median FK506 concentration at the time of rejection was 7.1 µg/L. All rejection reactions were reversed after adjusting the immunosuppression regimen. The interval between the last PD1 inhibitor and transplantation in the rejection group was shorter than that in the nonrejection group, and there was a statistical difference [21.0 (15.5-27.5) days vs. 60.0 (34.0-167.0) days, p =0.01]. In conclusion, PD1 inhibitor is a safe and feasible method for bridging or downstaging treatment before liver transplantation. Although preoperative PD1 inhibitor may increase the incidence of postoperative rejection, it is not associated with increased immune-related graft loss and patient death.


Assuntos
Carcinoma Hepatocelular , Neoplasias Hepáticas , Transplante de Fígado , Humanos , Transplante de Fígado/efeitos adversos , Terapia Neoadjuvante/efeitos adversos , Carcinoma Hepatocelular/cirurgia , Rejeição de Enxerto/epidemiologia , Rejeição de Enxerto/prevenção & controle , Neoplasias Hepáticas/cirurgia , Apoptose
9.
Scand J Gastroenterol ; 58(7): 805-812, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-36651020

RESUMO

BACKGROUND: To analyze the diversity in endoscopic manifestations of Meckel's diverticulum (MD) in adults by using balloon-assisted enteroscopy (BAE) and supply more information on the application of BAE. METHODS: A retrospective study was carried out on adult patients diagnosed with MD by BAE in two tertiary general hospitals in China, from May 2007 to September 2021. The patients were divided into a small bowel bleeding (SBB) group and a control group according to their main symptoms. Clinical charts and endoscopic images were reviewed, analyzed, and summarized. RESULTS: Single diverticulum in the ileum and double-lumen sign were observed in all patients. The SBB group consisted of 51 patients, among which 35 cases of ulcerative lesions, 9 cases of erosive lesions, 9 cases of active bleeding/blood clots, and 4 cases of lumps inside the diverticulum were observed respectively. Majority of ulcerative lesions were inside the diverticulum (23/35). A circumferential stricture inside the diverticulum was discovered in 11 cases, and ulcerative lesions tended to occur at this structure (10/11). In the control group consisting of 15 patients, 1 case of erosive lesions at the orifice edge was observed. The percentage of patients with MD-associated ulcerative lesions was significantly higher in the SBB group than that in the control group (p < 0.001). CONCLUSIONS: The endoscopic manifestations of MD in adults are extraordinarily complex and connected with the patients' primary symptoms. The internal features of MD should be regarded as crucial observational objectives in adult patients.


Assuntos
Divertículo Ileal , Humanos , Adulto , Divertículo Ileal/complicações , Divertículo Ileal/diagnóstico , Estudos Retrospectivos , Hospitais Gerais , Íleo/patologia , China , Hemorragia Gastrointestinal/diagnóstico
10.
Clin Lab ; 69(6)2023 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-37307136

RESUMO

BACKGROUND: The aim is to explore the clinical values of quantitative detection of serum hepatitis B surface antigen (HBsAg) and hepatitis B virus e antigen (HBeAg) levels for the virological response [hepatitis B virus (HBV)-deoxyribonucleic acid (DNA) level] of patients with HBV-related liver cirrhosis (HBV-LC) treated by entecavir. METHODS: A total of 147 patients with HBV-LC treated from January 2016 to January 2019 were assigned to virol-ogical response (VR) group (n = 87) and no virological response (NVR) group (n = 60) according to whether virological response occurred after treatment. The values of serum HBsAg and HBeAg levels for predicting virological response were determined by receiver operating characteristic (ROC) curve, Kaplan-Meier survival analysis, and 36-Item Short Form Survey (SF-36). RESULTS: Serum HBsAg and HBeAg levels before treatment were positively correlated with HBV-DNA level in patients with HBV-LC, and there were significant differences in serum HBsAg and HBeAg levels in the 8th, 12th, 24th, 36th, and 48th weeks of treatment (p < 0.01). In the 48th week of treatment, the area under the ROC curve (AUC) of serum HBsAg log value for predicting virological response was the largest [0.818, 95% confidence interval (CI): 0.709 - 0.965], and the optimal cutoff value, sensitivity, and specificity was 2.53 ± 0.53 IU/mL, 91.34%, and 71.93%, respectively. AUC of serum HBeAg level for predicting virological response was the largest (0.801, 95% CI: 0.673 - 0.979), and the optimal cutoff value, sensitivity, and specificity was 27.38 ± 2.14 PEIU/mL, 88.52%, and 83.42%, respectively. CONCLUSIONS: Serum HBsAg and HBeAg levels are correlated with the virological response of patients with HBV-LC treated by entecavir.


Assuntos
Antígenos de Superfície da Hepatite B , Antígenos E da Hepatite B , Humanos , Vírus da Hepatite B , Cirrose Hepática
11.
Clin Exp Immunol ; 209(3): 311-315, 2022 09 29.
Artigo em Inglês | MEDLINE | ID: mdl-35751647

RESUMO

OBJECTIVE: To explore the relationship between the expression levels of protein tyrosine phosphatase non-receptor type (PTPN) 22.6 mRNA in peripheral blood mononuclear cells (PBMCs) and the disease activity as well as clinical characteristics in Crohn's disease (CD) patients. METHODS: A total of 480 subjects were enrolled. Data were collected including baseline information, expression levels of PTPN22.6 mRNA in PBMCs for all subjects, C-reactive protein (CRP) levels in serum, clinical characteristics, and disease activity for all patients. Expression levels of PTPN22.6 mRNA in PBMCs, CRP levels in serum, clinical characteristics according to Montreal Classification [8], and Crohn's disease activity index (CDAI) were the primary observation outcomes. RESULTS: The expression levels of PTPN22.6 mRNA (P = 0.032) in PBMCs and serum CRP levels (P < 0.001) were significantly higher in active CD patients than in inactive CD patients (P = 0.032). Correlation analysis showed that there was a positive correlation between expression levels of PTPN22.6 mRNA and CDAI value (r = 0.512, P = 0.003), as well as expression levels of PTPN22.6 mRNA and CRP levels in the CD group (r = 0.456, P = 0.006). There were significantly higher expression levels of PTPN22.6 mRNA in PBMCs in patients with structuring behavior than that in patients with non-stricturing and non-penetrating (NSNP) behaviors (P = 0.018) and penetrating behaviors (P = 0.024). CONCLUSIONS: The expression levels of PTPN22.6 mRNA can be used as an indicator to help predict CD diagnosis, disease activity, serum CRP level, and behavior type of CD disease.


Assuntos
Doença de Crohn , Proteína C-Reativa/metabolismo , Doença de Crohn/diagnóstico , Doença de Crohn/genética , Humanos , Leucócitos Mononucleares/metabolismo , Proteína Tirosina Fosfatase não Receptora Tipo 22/genética , RNA Mensageiro/genética
12.
Phys Rev Lett ; 128(2): 028006, 2022 Jan 14.
Artigo em Inglês | MEDLINE | ID: mdl-35089740

RESUMO

Very thin elastic sheets, even at zero temperature, exhibit nonlinear elastic response by virtue of their dominant bending modes. Their behavior is even richer at finite temperature. Here, we use molecular dynamics to study the vibrations of a thermally fluctuating two-dimensional elastic sheet with one end clamped at its zero-temperature length. We uncover a tilted phase in which the sheet fluctuates about a mean configuration inclined with respect to the horizontal, thus breaking reflection symmetry. We determine the phase behavior as a function of the aspect ratio of the sheet and the temperature. We show that tilt may be viewed as a type of transverse buckling instability induced by clamping coupled to thermal fluctuations and develop an analytic model that predicts the tilted and untilted regions of the phase diagram. Qualitative agreement is found with the molecular dynamics simulations. Unusual response driven by control of purely geometric quantities like the aspect ratio, as opposed to external fields, offers a very rich playground for two-dimensional mechanical metamaterials.

13.
J Org Chem ; 87(21): 14394-14406, 2022 11 04.
Artigo em Inglês | MEDLINE | ID: mdl-36206145

RESUMO

Herein, we describe the construction of indole-fused seven-membered N- and O-heterocycles from indolyl α-diazocarbonyls via photoredox-catalyzed intramolecular cyclization. The photoredox process features operational simplicity, mild conditions, and as low as 0.1 mol % catalyst loading. The tricyclic heterocycles are obtained in yields of 24 to 67% with excellent regioselectivity. The practicality of this protocol is further demonstrated by gram-scale reactions carried out in both batch and continuous flow.


Assuntos
Indóis , Ciclização , Catálise
14.
Appl Opt ; 61(28): 8376-8381, 2022 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-36256151

RESUMO

Porous ZnO nanosheets (ZnO NSs) may play an important role in self-powered UV photodetectors due to their excellent properties, and their porosity feature affects the photoresponse performance greatly. Porous ZnO NSs were prepared by the hydrothermal method followed with a one-step annealing treatment. The effects of the annealing temperature on the microstructure and photoresponse of porous ZnO NSs and n-ZnO NSs/p-PEDOT:PSS self-powered UV photodetectors were investigated. The results show that the pore density and size of ZnO NSs can be tuned by changing the annealing temperature. At an optimum annealing temperature of 450°C, ZnO NSs exhibit greater absorption capacity for the suitable pore density and size. Meanwhile, more crystal defects due to surface contractile properties increase the number of photogenerated carriers. On this basis, the n-ZnO NSs/p-PEDOT:PSS photodetector presents a larger photocurrent and fast photodetection speed without external bias voltage, indicating the self-powered performance. The higher light absorption and large number of electron-hole pairs resulting from dense pores and surface defects in porous ZnO NSs might account for the enhanced performances.

15.
Int J Mol Sci ; 23(18)2022 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-36142886

RESUMO

Soybean is one of the most important food crops in the world. However, with the environmental change in recent years, many environmental factors like drought, salinity, heavy metal, and disease seriously affected the growth and development of soybean, causing substantial economic losses. In this study, we screened a bZIP transcription factor gene, GmbZIP152, which is significantly induced by Sclerotinia sclerotiorum (S. sclerotiorum), phytohormones, salt-, drought-, and heavy metal stresses in soybean. We found that overexpression of GmbZIP152 in Arabidopsis (OE-GmbZIP152) enhances the resistance to S. sclerotiorum and the tolerance of salt, drought, and heavy metal stresses compared to wild-type (WT). The antioxidant enzyme related genes (including AtCAT1, AtSOD, and AtPOD1) and their enzyme activities are induced by S. sclerotiorum, salt, drought, and heavy metal stress in OE-GmbZIP152 compared to WT. Furthermore, we also found that the expression level of biotic- and abiotic-related marker genes (AtLOX6, AtACS6, AtERF1, and AtABI2, etc.) were increased in OE-GmbZIP152 compared to WT under S. sclerotiorum and abiotic stresses. Moreover, we performed a Chromatin immunoprecipitation (ChIP) assay and found that GmbZIP152 could directly bind to promoters of ABA-, JA-, ETH-, and SA-induced biotic- and abiotic-related genes in soybean. Altogether, GmbZIP152 plays an essential role in soybean response to biotic and abiotic stresses.


Assuntos
Arabidopsis , Glycine max , Antioxidantes/metabolismo , Arabidopsis/metabolismo , Fatores de Transcrição de Zíper de Leucina Básica/genética , Fatores de Transcrição de Zíper de Leucina Básica/metabolismo , Secas , Regulação da Expressão Gênica de Plantas , Reguladores de Crescimento de Plantas/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Plantas Geneticamente Modificadas/genética , Cloreto de Sódio/farmacologia , Glycine max/metabolismo , Estresse Fisiológico/genética
16.
Curr Psychol ; 41(8): 5631-5639, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-33046955

RESUMO

To assess the psychological effects of the novel coronavirus disease (COVID-19) on medical staff and the general public. During the outbreak of COVID-19, an internet-based questionnaire included The Self-rating Depression Scale (SDS), Perceived Stress Scale (PSS-10), and Impact of Event Scale-Revised (IES-R) was used to assess the impact of the pandemic situation on the mental health of medical staff and general population in Wuhan and its surrounding areas. Among the 1493 questionnaires completed, 827 (55.39%) of these were men, and 422 (28.27%) of these were medical personnel. The results suggest that the outbreak of COVID-19 has affected individuals significantly, the degree of which is related to age, sex, occupation and mental illness. There was a significant difference in PSS-10 and IES-R scores between the medical staff and the general population. The medical staff showed higher PSS-10 scores (16.813 ± 4.87) and IES-R scores (22.40 ± 12.12) compared to members of the general population PSS-10 (14.80 ± 5.60) and IES-R scores (17.89 ± 13.08). However, there was no statistically significant difference between the SDS scores of medical staff (44.52 ± 12.36) and the general public (43.08 ± 11.42). In terms of the need for psychological assistance, 50.97% of interviewees responded that they needed psychological counseling, of which medical staff accounted for 65.87% and non-medical staff accounted for 45.10%. During the ongoing COVID-19 outbreak, great attention should be paid to the mental health of the population, especially medical staff, and measures such as psychological intervention should be actively carried out for reducing the psychosocial effects.

17.
Small ; 17(23): e2100439, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33891802

RESUMO

Interfacial engineering and heterostructures designing are two efficient routes to improve photoelectric characteristics of a photodetector. Herein, a Ti3 C2 MXene/Si heterojunction photodetector with ultrahigh specific detectivity (2.03 × 1013 Jones) and remarkable responsivity (402 mA W-1 ) at zero external bias without decline as with increasing the light power is reported. This is achieved by chemically regrown interfacial SiOx layer and the control of Ti3 C2 MXene thickness to suppress the dark noise current and improve the photoresponse. The photodetector demonstrates a high light on/off ratio of over 106 , an outstanding peak external quantum efficiency (EQE) of 60.3%, while it maintains an ultralow dark current at 0 V bias. Moreover, the device holds high performance with EQE of over 55% even after encapsulated with silicone, trying to resolve the air stability issue of Ti3 C2 MXene. Such a photodetector with high detectivity, high responsivity, and self-powered capability is particularly applicable to detect weak light signal, which presents high potential for imaging, communication and sensing applications.

18.
BMC Infect Dis ; 21(1): 111, 2021 Jan 23.
Artigo em Inglês | MEDLINE | ID: mdl-33485302

RESUMO

BACKGROUND: T cells play an important role in the prognosis of hepatitis B virus (HBV) infection, and are involved in the seroconversion of a patient from HBsAb negative to positive. To compare the T-cell receptor ß-chain variable region (TcRBV) complementarity-determining region 3 (CDR3) in subjects with or without hepatitis B surface antigen (HBsAg) convert to hepatitis B surface antibody (HBsAb), the TcRBV was determined using high throughput sequencing (HTS). METHODS: The clonotype and diversity of CDR3 in peripheral blood mononuclear cells of subjects with resolved acute hepatitis B (AHB, HBsAb+, HBsAg-) (n = 5), chronic hepatitis B (CHB, HBsAb-, HBsAg+) (n = 5), and healthy controls (HC, HBsAb-, HBsAg-) (n = 3) were determined and analyzed using HTS (MiSeq). RESULTS: The overlapping rate of CDR3 clones of any two samples in AHB group was 2.00% (1.74% ~ 2.30%), CHB group was 1.77% (1.43% ~ 2.61%), and HC group was 1.82% (1.62% ~ 2.12%), and there was no significant difference among the three groups by Kruskal-Wallis H test. However, among the top 10 cumulative frequencies of clonotypes, only the frequency of clonotype (TcRBV20-1/BD1/BJ1-2) in AHB group was lower than that of HC group (P < 0.001). Moreover, exclude the 10 top clonotypes, there are 57 markedly different frequency of clones between AHB and CHB groups (18 clones up, 39 clones down), 179 (180-1) different clones between AHB and HC groups, and 134 different clones between CHB and HC groups. With regard to BV and BJ genotypes, there was no significant different frequency among the groups. Furthermore, there was no significant difference in the diversity of TcRBV CDR3 among the three groups (P > 0.05). CONCLUSIONS: Thus, there are 57 TcRBV clonotypes that may be related to HBsAg seroconversion of AHB subjects, but the diversity of TcRBV CDR3 is not significantly related to the HBsAb positive status.


Assuntos
Regiões Determinantes de Complementaridade/genética , Hepatite B/imunologia , Receptores de Antígenos de Linfócitos T alfa-beta/genética , Linfócitos T/imunologia , Adulto , Feminino , Hepatite B/sangue , Anticorpos Anti-Hepatite B/sangue , Antígenos de Superfície da Hepatite B/sangue , Vírus da Hepatite B/imunologia , Hepatite B Crônica/genética , Hepatite B Crônica/imunologia , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Leucócitos Mononucleares/imunologia , Masculino , Pessoa de Meia-Idade , Soroconversão , Adulto Jovem
19.
Transpl Int ; 34(7): 1261-1270, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33484201

RESUMO

The use of steatotic livers in liver transplantation (LT) is controversial. Ischaemia-free liver transplantation (IFLT) has obvious advantages for the recovery of allograft function. The aim of this study was to examine the effect of liver grafts with steatosis on outcome and the effect of IFLT with steatotic livers. 360 patients with LT were enrolled in this study. Perioperative characteristics and differences in outcome among different grades of steatotic groups, and between the IFLT and conventional LT (CLT) groups were analysed. Occurrence of early allograft dysfunction (EAD; 50%) and primary nonfunction (PNF; 20%) was significantly higher in the severe steatosis group (P < 0.001 and <0.001, respectively). Survival rate is significantly low in severe steatosis group (3-year: 60%, P = 0.0039). The IFLT group had a significantly lower occurrence of EAD than the CLT group (0% vs. 60%, P = 0.01). The level of postoperative peak AST, GGT and creatine were significantly lower in IFLT group (P = 0.009, 0.032 and 0.024, respectively). In multivariable analysis, IFLT and EAD were independent factors affecting postoperative survival. Severe steatotic livers lead to severe complications and poor outcomes in LT. IFLT has obvious advantages for reducing the rate of EAD in LT with steatotic livers.


Assuntos
Transplante de Fígado , Sobrevivência de Enxerto , Humanos , Fígado/cirurgia , Doadores Vivos , Prognóstico , Estudos Retrospectivos , Índice de Gravidade de Doença
20.
Small ; 16(22): e2001323, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32378354

RESUMO

The recharge ability of zinc metal-based aqueous batteries is greatly limited by the zinc anode. The poor cycling durability of Zn anodes is attributed to the dendrite growth, shape change and passivation, but this issue has been ignored by using an excessive amount of Zn in the past. Herein, a 3D nanoporous (3D NP) Zn-Cu alloy is fabricated by a sample electrochemical-assisted annealing thermal method combined, which can be used directly as self-supported electrodes applied for renewable zinc-ion devices. The 3D NP architectures electrode offers high electron and ion transport paths and increased material loading per unit substrate area, which can uniformly deposit/strip Zn and improve charge storage ability. Benefiting from the intrinsic materials and architectures features, the 3D NP Zn-Cu alloy anode exhibits high areal capacity and excellent cycling stability. Further, the fabricated high-voltage double electrolyte aqueous Zn-Br2 battery can deliver maximum areal specific capacity of ≈1.56 mAh cm-2 , which is close to the level of typical commercial Li-ion batteries. The excellent performance makes it an ideal candidate for next-generation aqueous zinc-ion batteries.

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