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2.
Zhongguo Gu Shang ; 37(8): 764-71, 2024 Aug 25.
Artigo em Chinês | MEDLINE | ID: mdl-39182999

RESUMO

OBJECTIVE: To explore the clinical efficacy and safety of one-stage posterior lesion removal and internal spinal fixation in patients with lumbar Brucellosis spondylitis. METHODS: The clinical data of 24 patients admitted from October 2017 to October 2022 were retrospectively analyzed, 2 patients were lost to follow-up at 10 months after surgery, at the final 22 cases were included in the study, including 13 males and 9 females with an average age of (52.00±6.89) years old, were treated with one-stage posterior lesion removal and internal spinal fixation. The operation time, intraoperative bleeding, follow-up time, erythrocyte sedimentation rate(ESR) and C-reactive protein(CRP) before and after operation were recorded. The pain visual analogue scale(VAS), Oswestry disability index(ODI), the Japanese Orthopaedic Association(JOA) score for neurofunction, American Spinal Injury Association(ASIA) spinal cord injury grade and modified MacNab criteria were ussed to evaluate the efficacy. RESULTS: All patients were followed up from 12 to 30 months with an average of (17.41±4.45) months. The operation time was 70 to 155 min with an average of (116.59±24.32) min;the intraoperative bleeding volume was 120 to 520 ml with an average of (275.00±97.53) ml. CRP and ESR levels decreased more significantly at 1 week and at the final follow-up than preoperative levels(P<0.05). VAS, JOA score and ODI at 1 week and at the latest follow-up were more significantly improved than preoperative results(P<0.05). There was no significant difference between ASIA preoperative and 1 week after operation(P>0.05), and a significant difference between preoperative and last follow-up(P<0.05). In the final follow-up, 21 patients had excellent efficacy, 1 patient had fair, and there was no recurrence during the follow-up. CONCLUSION: One-stage transpedicular lesion removal and internal spinal fixation, with few incisions and short operation time, helps the recovery of neurological function, and the prognosis meets the clinical requirements, which can effectively control Brucella spondylitis.


Assuntos
Brucelose , Desbridamento , Vértebras Lombares , Espondilite , Humanos , Masculino , Feminino , Pessoa de Meia-Idade , Espondilite/cirurgia , Desbridamento/métodos , Brucelose/cirurgia , Vértebras Lombares/cirurgia , Adulto , Estudos Retrospectivos , Fixação Interna de Fraturas/métodos
3.
Adv Mater ; 36(35): e2405183, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38973222

RESUMO

Biological materials relying on hierarchically ordered architectures inspire the emergence of advanced composites with mutually exclusive mechanical properties, but the efficient topology optimization and large-scale manufacturing remain challenging. Herein, this work proposes a scalable bottom-up approach to fabricate a novel nacre-like cement-resin composite with gradient brick-and-mortar (BM) structure, and demonstrates a machine learning-assisted method to optimize the gradient structure. The fabricated gradient composite exhibits an extraordinary combination of high flexural strength, toughness, and impact resistance. Particularly, the toughness and impact resistance of such composite attractively surpass the cement counterparts by factors of approximately 700 and 600 times, and even outperform natural rocks, fiber-reinforced cement-based materials and even some alloys. The strengthening and toughening mechanisms are clarified as the regional-matrix densifying and crack-tip shielding effects caused by the gradient BM structure. The developed gradient composite not only endows a promising structural material for protective applications in harsh scenarios, but also paves a new way for biomimetic metamaterials designing.

4.
Adv Sci (Weinh) ; 11(28): e2401948, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38769650

RESUMO

The integration of electrochromic devices and energy storage systems in wearable electronics is highly desirable yet challenging, because self-powered electrochromic devices often require an open system design for continuous replenishment of the strong oxidants to enable the coloring/bleaching processes. A self-powered electrochromic device has been developed with a close configuration by integrating a Zn/MnO2 ionic battery into the Prussian blue (PB)-based electrochromic system. Zn and MnO2 electrodes, as dual shared electrodes, the former one can reduce the PB electrode to the Prussian white (PW) electrode and serves as the anode in the battery; the latter electrode can oxidize the PW electrode to its initial state and acts as the cathode in the battery. The bleaching/coloring processes are driven by the gradient potential between Zn/PB and PW/MnO2 electrodes. The as-prepared Zn||PB||MnO2 system demonstrates superior electrochromic performance, including excellent optical contrast (80.6%), fast self-bleaching/coloring speed (2.0/3.2 s for bleaching/coloring), and long-term self-powered electrochromic cycles. An air-working Zn||PB||MnO2 device is also developed with a 70.3% optical contrast, fast switching speed (2.2/4.8 s for bleaching/coloring), and over 80 self-bleaching/coloring cycles. Furthermore, the closed nature enables the fabrication of various flexible electrochromic devices, exhibiting great potentials for the next-generation wearable electrochromic devices.

5.
Phys Chem Chem Phys ; 25(35): 24097-24109, 2023 Sep 13.
Artigo em Inglês | MEDLINE | ID: mdl-37655461

RESUMO

Polymers are known to effectively improve the toughness of inorganic matrices; however, the mechanism at the molecular level is still unclear. In this study, we used molecular dynamics simulations to unravel the effects and mechanisms of different molecular chain lengths of polyacrylic acid (PAA) on toughening calcium silicate hydrate (CSH), which is the basic building block of cement-based materials. Our simulation results indicate that an optimal molecular chain length of polymers contributes to the largest toughening effect on the matrix, leading to up to 60.98% increase in fracture energy. During the uniaxial tensile tests along the x-axis and z-axis direction, the configuration evolution of the PAA molecule determines the toughening effect. As the polymer unfolds and its size matches the defects of CSH, the stress distribution of the system becomes more homogeneous, which favors an increase in toughness. Furthermore, based on our simulation results and a mathematical model, we propose a theory of "strain rate/optimal chain length". This theory suggests that the optimal toughening effect can be achieved when the molecular chain length of the organic component is 1.3-1.5 times the largest defect size of the inorganic matrix. This work provides molecular-scale insights into the toughening mechanisms of an organic/inorganic system and may have practical implications for improving the toughness of cement-based materials.

6.
Int J Biol Macromol ; 251: 126341, 2023 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-37591425

RESUMO

Different membrane materials have broadly been constructed for oil-containing water separation, but most of preparation routes involve corrosive or toxic chemicals and especially many materials have only single superwetting property. Herein, a novel and eco-friendly cellulose-based textile membrane is developed by incorporating the composite coating consisting of arabic gum (AG), attapulgite (APT), and iron (Fe) onto cellulose textiles. The functionalized textile is superoleophobic underwater and superhydrophobic underoil. As a result, the textile prewetted with water or oil can be employed to separate light oil layer/water and heavy oil layer/water mixtures, respectively, and the separation efficiency to the two types of mixtures is larger than 98.3 %. Results also reveal that the decorated textile possesses superior stability and recyclability in purifying oily wastewater. More importantly, such coated textile is capable of filtrating water-soluble contaminants (dyes) from polluted water. Due to the versatility and environmental compatibility of product as well as the accessibility as agricultural and forestry product as raw materials, the advanced textiles may offer effective solutions to oily wastewater purification and water-soluble contaminant removal.

8.
Nat Commun ; 14(1): 3438, 2023 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-37301895

RESUMO

The inherent quasi-brittleness of cement-based materials, due to the disorder of their hydration products and pore structures, present significant challenges for directional matrix toughening. In this work, a rigid layered skeleton of cement slurry was prepared using a simplified ice-template method, and subsequently flexible polyvinyl alcohol hydrogel was introduced into the unidirectional pores between neighboring cement platelets, resulting in the formation of a multi-layered cement-based composite. A toughness improvement of over 175 times is achieved by the implantation of such hard-soft alternatively layered microstructure. The toughening mechanism is the stretching of hydrogels at the nano-scale and deflections of micro-cracks at the interfaces, which avoid stress concentration and dissipate huge energy. Furthermore, this cement-hydrogel composite also exhibits a low thermal conductivity (around 1/10 of normal cement) and density, high specific strength and self-healing properties, which can be used in thermal insulation, seismic high-rise buildings and long-span bridges.


Assuntos
Hidrogéis , Hidrogéis/química , Condutividade Térmica
9.
Adv Sci (Weinh) ; 10(18): e2300340, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37092566

RESUMO

The energy crisis has arisen as the most pressing concern and top priority for policymakers, with buildings accounting for over 40% of global energy consumption. Currently, single-function envelopes cannot satisfy energy efficiency for next-generation buildings. Designing buildings with high mechanical robustness, thermal insulation properties, and more functionalities has attracted worldwide attention. Further optimization based on bioinspired design and material efficiency improvement has been adopted as effective approaches to achieve satisfactory performance. Herein, inspired by the strong and porous cuttlefish bone, a cement aerogel through self-assembly of calcium aluminum silicate hydrate nanoparticles (C-A-S-H, a major component in cement) in a polymeric solution as a building envelop is developed. The as-synthesized cement aerogel demonstrates ultrahigh mechanical performance in terms of stiffness (315.65 MPa) and toughness (14.68 MJ m-3 ). Specifically, the highly porous microstructure with multiscale pores inside the cement aerogel greatly inhibits heat transfer, therefore achieving ultralow thermal conductivity (0.025 W m-1 K-1 ). Additionally, the inorganic C-A-S-H nanoparticles in cement aerogel form a barrier against fire for good fire retardancy (limit oxygen index, LOI ≈ 46.26%, UL94-V0). The versatile cement aerogel featuring high mechanical robustness, remarkable thermal insulation, light weight, and fire retardancy is a promising candidate for practical building applications.


Assuntos
Alumínio , Nanopartículas , Cálcio , Carbono , Temperatura Alta
10.
Pregnancy Hypertens ; 29: 7-13, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35660512

RESUMO

OBJECTIVE: Previously, a number of previous studies on human leukocyte antigen G (HLA-G) and preeclampsia (PE) have demonstrated that expression of HLA-G is significantly reduced in women with PE. However, no study has confirmed whether maternal serum HLA-G could be used as a clinical test when HLA-G1/-G5 isoforms were measured. Therefore, the present study is to develop a novel HLA-G ELISA which is able to detect all isoforms of HLA-G and then to perform a retrospective case-control study to investigate clinical significance of maternal serum HLA-G for predicting PE. METHODS: A recombinant HLA-G fragment which containing partial sequences of HLA-G α1 and α2 domains was constructed to develop two novel monoclonal antibodies against HLA-G. A novel HLA-G sandwich ELISA which could detect all isoforms of HLA-G was developed. By using the ELISA, predictive effectiveness of maternal serum HLA-G in a retrospective case control study was evaluated. RESULTS: At the first trimester and early second trimester, detection of maternal serum HLA-G had the sensitivity of 54.3% and 48.5% and the specificity of 97.8% and 96.3% in the prediction of PE. These were significantly higher than those at the third trimester (P < 0.05). CONCLUSION: HLA-G isoforms other than HLA-G1/-G5 are expressed in some pregnant women who have low level or lack HLA-G1/-G5. Measurement of all HLA-G isoforms in maternal serum could be used as a clinical test for early prediction of PE.


Assuntos
Antígenos HLA-G , Pré-Eclâmpsia , Estudos de Casos e Controles , Feminino , Humanos , Gravidez , Isoformas de Proteínas , Estudos Retrospectivos
11.
Phytother Res ; 36(1): 53-61, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34510592

RESUMO

The present study aims to summarize and quantitatively examine the available evidence on the effectiveness of anthocyanin supplementation on liver enzymes among patients with metabolic disorders, by employing a systematic review and meta-analytic approach. Online databases including PubMed/Medline, Scopus, ISI Web of Science, and Cochrane Library were searched up to June 2020 for randomized controlled trials (RCTs) that examined the effect of anthocyanin supplementation on serum levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) among patients with metabolic disorders. To estimate the overall effect of anthocyanin supplementation, we employed the random-effects model. In total, 12 RCTs were included in the systematic review. Pooled analysis did not show any significant changes in ALT (WMD: -0.92 U/L, 95% CI: -4.19 to 2.35, p = .58; I2  = 91.3%) and AST (WMD: -1.22 U/L, 95% CI: -3.43 to 0.99, p = .28; I2  = 87.0) concentrations after supplementation with anthocyanin. The dose and duration of supplementation were the potential sources of heterogeneity among most of the trials. However, subgroup analysis showed that the effect is not statistically significant in all subgroups. Overall, in our study, anthocyanin does not have any effect on liver enzyme levels significantly. However, future high-quality studies are still needed to confirm the results.


Assuntos
Antocianinas , Doenças Metabólicas , Suplementos Nutricionais , Humanos , Fígado , Doenças Metabólicas/tratamento farmacológico , Ensaios Clínicos Controlados Aleatórios como Assunto
12.
Ann Palliat Med ; 10(6): 6617-6629, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-34154340

RESUMO

BACKGROUND: Traditional Chinese medicine (TCM) has demonstrated excellent effects in treating diabetic nephropathy, and Yiqi Huoxue prescription has been widely used clinically. In the study, its effects on the kidney function and blood glucose of patients were explored. METHODS: Chinese and English databases including PubMed, Medline, Embase, and Web of Sciences were used to retrieve articles comparing the treatment of diabetic nephropathy using Yiqi Huoxue prescription on the basis of conventional Western medicine treatment (experimental group) and conventional Western medicine treatment alone (control group) published from January 2000 to December 2020. The risk of bias assessment tool of the Cochrane System Review Manual 5.2.2 and the Jadad scale were used to evaluate the quality of the included literature. The outcome indexes were extracted, and the Review Manager 5.3 software was used for meta-analysis. RESULTS: A total of 13 articles that satisfied the inclusion/exclusion criteria were included in this study. After treatment, compared to the control group, the experimental group exhibited lower urine microalbumin excretion rate (UAER) [mean difference (MD) =-33.94, 95% confidence interval (CI), -42.60 to -25.28, P<0.00001], serum creatinine (SCr) (MD =-7.43, 95% CI, -11.50 to -3.36, P=0.0004), blood urea nitrogen (BUN) (SMD =-1.23, 95% CI, -2.49 to 0.03, P=0.04), blood glucose-related indexes [fasting blood glucose (FBG)] (MD =-0.43, 95% CI, -0.87 to 0.01, P=0.03), glycosylated hemoglobin (HbA1c) (MD =-0.38, 95% CI, -0.68 to -0.08, P=0.01), blood lipid-related indexes [triglycerides (TG)] (MD =-0.44, 95% CI, -0.76 to -0.13, P=0.006), and serum total cholesterol (TC) (MD =-0.37, 95% CI, -0.57 to -0.18, P=0.0002). Furthermore, the experimental group also showed higher effectiveness rate (odds ratio =3.81, 95% CI, 2.71 to 5.35, P<0.00001) after treatment. DISCUSSION: The included literature had low bias risk. Yiqi Huoxue prescription on the basis of conventional Western medicine can significantly improve the renal function and reduce the levels of blood glucose and blood lipids of patients with diabetic nephropathy.


Assuntos
Diabetes Mellitus , Nefropatias Diabéticas , Glicemia , Nefropatias Diabéticas/tratamento farmacológico , Humanos , Medicina Tradicional Chinesa , Prescrições
13.
Sensors (Basel) ; 21(2)2021 Jan 19.
Artigo em Inglês | MEDLINE | ID: mdl-33477949

RESUMO

Timely and accurate crop growth monitoring and yield estimation are important for field management. The traditional sampling method used for estimation of ramie yield is destructive. Thus, this study proposed a new method for estimating ramie yield based on field phenotypic data obtained from unmanned aerial vehicle (UAV) images. A UAV platform carrying RGB cameras was employed to collect ramie canopy images during the whole growth period. The vegetation indices (VIs), plant number, and plant height were extracted from UAV-based images, and then, these data were incorporated to establish yield estimation model. Among all of the UAV-based image data, we found that the structure features (plant number and plant height) could better reflect the ramie yield than the spectral features, and in structure features, the plant number was found to be the most useful index to monitor the yield, with a correlation coefficient of 0.6. By fusing multiple characteristic parameters, the yield estimation model based on the multiple linear regression was obviously more accurate than the stepwise linear regression model, with a determination coefficient of 0.66 and a relative root mean square error of 1.592 kg. Our study reveals that it is feasible to monitor crop growth based on UAV images and that the fusion of phenotypic data can improve the accuracy of yield estimations.


Assuntos
Boehmeria , Tecnologia de Sensoriamento Remoto
14.
J Viral Hepat ; 28(5): 795-808, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-33482039

RESUMO

The immunomodulatory effects of entecavir (ETV) in anti-hepatitis B virus (HBV) therapy have long been recognized. This study aimed to determine the effects of ETV on non-natural killer innate lymphoid cells (non-NK ILCs) in HBV-related liver disease progression. We enrolled treatment-naïve chronic hepatitis B (CHB) and HBV-related liver cirrhosis (LC) patients treated with ETV for 24 months. Before and after therapy, the frequency and cytokine profiles of ILC2s and non-NK ILCs subset homeostasis and their clinical significance were determined, and serial serum interferon (IFN)-λ levels were analysed. Peripheral blood mononuclear cells (PBMCs) of untreated LC patients were cultured with serum from untreated and ETV-treated LC patients in addition to being subject to IFN-λ1 neutralization and stimulation, and the frequency and cytokine production of ILC2s as well as non-NK ILCs subset ratios were calculated. Furthermore, IFN-λ receptor expression on non-NK ILCs and dendritic cells (DCs) was measured. After 24 months of ETV treatment, the frequency and cytokine production of ILC2s (IL-4, IL-13, IFN-γ, TNF-α) decreased with increased ILC1/ILC2 and decreased ILC2/ILC3 ratios, revealing a close association with disease status in LC patients. Long-term ETV administration-induced serum IFN-λ1 levels were negatively correlated with ILC2s. ETV-treated LC serum culture and IFN-λ1 stimulation yielded similar effects on suppression of ILC2s, and IFN-λ1 neutralization in serum culture partly inhibited this effect. The IFN-λ receptor was detected on DCs but not on non-NK ILCs. In conclusion, ETV suppresses the frequency and cytokine profiles of ILC2s by increasing IFN-λ1 in LC patients.


Assuntos
Vírus da Hepatite B , Hepatite B Crônica , Antivirais/uso terapêutico , Guanina/análogos & derivados , Hepatite B Crônica/complicações , Hepatite B Crônica/tratamento farmacológico , Humanos , Imunidade Inata , Interferons/uso terapêutico , Leucócitos Mononucleares , Cirrose Hepática/tratamento farmacológico , Linfócitos
15.
Skeletal Radiol ; 50(2): 371-379, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-32767060

RESUMO

OBJECTIVE: This study observed the distribution of CT attenuation values for T10-L3 vertebral bodies and derived the Hounsfield unit (HU) thresholds using the quantitative computed tomography (QCT) as a reference to predict osteoporosis and normal bone density. METHODS: We included 482 subjects who were scheduled to undergo CT lung cancer screening and pulmonary nodule follow-up from May 2015 to February 2019. The subjects were scanned with the calibration phantom beneath the back while performing a chest CT scan. The volumetric bone mineral density (vBMD) and CT attenuation values of T10-L3 vertebral bodies were measured, and the correlation between the two measurements was analyzed. Receiver operator characteristic (ROC) curves were generated to determine diagnostic optimal thresholds. RESULTS: A total of 2716 vertebral bodies of 457 participants were measured after exclusion screening. CT attenuation value of each plane's vertebral body showed a strong correlation with vBMD. The optimal threshold of > 141 HU was 93.5% sensitive and 86.1% specific for the recognition of normal BMD. The optimal threshold of < 102.4 HU was 96.9% specific and 82.1% sensitive for distinguishing osteoporosis from osteopenia and normal BMD. The average CT attenuation values of vertebral bodies with compressed and normal morphology were 108.9 ± 20.6 and 136.8 ± 32.2 HU, respectively. CONCLUSION: Sagittal reconstruction of the thoracic vertebrae using routine thoracic CT image combined with CT attenuation value measurements of the spine is valuable for predicting bone mineral density in high-risk populations. The mean CT attenuation values of the vertebral bodies with vertebral compression appearance were lower than that of normal vertebral shape.


Assuntos
Neoplasias Pulmonares , Osteoporose , Absorciometria de Fóton , Densidade Óssea , Detecção Precoce de Câncer , Humanos , Vértebras Lombares/diagnóstico por imagem , Osteoporose/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Corpo Vertebral
16.
ACS Appl Mater Interfaces ; 12(47): 53297-53309, 2020 Nov 25.
Artigo em Inglês | MEDLINE | ID: mdl-33169963

RESUMO

Because of the inherent quasibrittleness and heterogeneity, matrix-directed toughening of concrete and cement composites remains to be a huge challenge. Herein, inspired by nacre materials, a novel biomimetic bulk cement composite is fabricated via a facile and efficient process based on compacting prefabricated multisized cement-polymer hybrid prills. This method combines with the three-dimensional "brick-bridge-mortar" structure design and synchronously the intrinsic and extrinsic toughening strategies. Such an approach shows the remarkable maximum toughness enhancement of 27-fold with 71% increase in flexural strength via cooperation with only 4 wt % organic matter. More attractively, it alters the traditional brittle fracture of cement composites to a distinct ductile fracture. In addition, such a biomimetic composite demonstrates the long-term ever-increasing strength and toughness, performing the excellent ductile-fracture retention ability. The hierarchical toughening mechanisms are further revealed with the synergy of microscopic characterizations and simulation methods. This strategy provides a new route for the development of high toughness biomimetic cement-based materials for potential applications in civil engineering domain.

17.
Materials (Basel) ; 13(13)2020 Jul 06.
Artigo em Inglês | MEDLINE | ID: mdl-32640659

RESUMO

This study develops a novel self-sensing cement composite by simply mixing reduced graphene oxide (rGO) in cementitious material. The experimental results indicate that, owing to the excellent dispersion method, the nucleation and two-dimensional morphological effect of rGO optimizes the microstructure inside cement-based material. This would increase the electric conductivity, thermal property and self-induction system of cement material, making it much easier for cementitious material to better warn about impending damage. The use of rGO can improve the electric conductivity and electric shielding property of rGO-paste by 23% and 45%. The remarkable enhancement was that the voltage change rate of 1.00 wt.%-rGO paste under six-cycle loads increased from 4% to 12.6%, with strain sensitivity up to 363.10, without compromising the mechanical properties. The maximum compressive strength of the rGO-mortar can be increased from 55 MPa to 71 MPa. In conclusion, the research findings provide an effective strategy to functionalize cement materials by mixing rGO and to achieve the stronger electric shielding property and higher-pressure sensitivity of rGO-cement composites, leading to the development of a novel high strength self-sensing cement material with a flexural strength up to 49%.

18.
World J Gastroenterol ; 25(43): 6440-6450, 2019 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-31798280

RESUMO

BACKGROUND: Serum amyloid A (SAA) is an acute phase protein mainly synthesized by the liver. SAA induces inflammatory phenotype and promotes cell proliferation in activated hepatic stellate cells, the major scar forming cells in the liver. However, few studies have reported on the serum levels of SAA in human liver disease and its clinical significance in various liver diseases. AIM: To investigate the serum levels of SAA in patients with different liver diseases and analyze the factors associated with the alteration of SAA levels in chronic hepatitis B (CHB) patients. METHODS: Two hundred and seventy-eight patients with different liver diseases and 117 healthy controls were included in this study. The patients included 205 with CHB, 22 with active autoimmune liver disease (AILD), 21 with nonalcoholic steatohepatitis (NASH), 14 with drug-induced liver injury (DILI), and 16 with pyogenic liver abscess. Serum levels of SAA and other clinical parameters were collected for the analysis of the factors associated with SAA level. Mann-Whitney U test was used to compare the serum SAA levels of patients with various liver diseases with those of healthy controls. Bonferroni test was applied for post hoc comparisons to control the probability of type 1 error (alpha = 0.05/6 = 0.008). For statistical tests of other variables, P < 0.05 was considered statistically significant. Statistically significant factors determined by single factor analysis were further analyzed by binary multivariate logistic regression analysis. RESULTS: All patients with active liver diseases had higher serum SAA levels than healthy controls and the inactive CHB patients, with the highest SAA level found in patients with pyogenic liver abscess (398.4 ± 246.8 mg/L). Patients with active AILD (19.73 ± 24.81 mg/L) or DILI (8.036 ± 5.685 mg/L) showed higher SAA levels than those with active CHB (6.621 ± 6.776 mg/L) and NASH (6.624 ± 4.891 mg/L). Single (P < 0.001) and multivariate logistic regression analyses (P = 0.039) for the CHB patients suggested that patients with active CHB were associated with an SAA serum level higher than 6.4 mg/L. Serum levels of SAA and CRP (C-reactive protein) were positively correlated in patients with CHB (P < 0.001), pyogenic liver abscess (P = 0.045), and active AILD (P = 0.02). Serum levels of SAA (0.80-871.0 mg/L) had a broader fluctuation range than CRP (0.30-271.3 mg/L). CONCLUSION: Serum level of SAA is a sensitive biomarker for inflammatory activity of pyogenic liver abscess. It may also be a weak marker reflecting milder inflammatory status in the liver of patients with CHB and other active liver diseases.


Assuntos
Hepatopatias/sangue , Proteína Amiloide A Sérica/metabolismo , Adulto , Biomarcadores/sangue , Proteína C-Reativa/metabolismo , Estudos de Casos e Controles , Doença Crônica , Feminino , Humanos , Abscesso Hepático Piogênico/sangue , Masculino , Pessoa de Meia-Idade
19.
J Vis Exp ; (154)2019 12 16.
Artigo em Inglês | MEDLINE | ID: mdl-31885387

RESUMO

Here, we present a comprehensive method to illustrate the uneven distribution of the interfacial transition zone (ITZ) around the aggregate and the effect of aggregate surface morphology on the formation of ITZ. First, a model concrete sample is prepared with a spherical ceramic particle in roughly the central part of the cement matrix, acting as a coarse aggregate used in common concrete/mortar. After curing until the designed age, the sample is scanned by X-ray computed tomography to determine the relative location of the ceramic particle inside the cement matrix. Three locations of the ITZ are chosen: above the aggregate, on the side of the aggregate, and below the aggregate. After a series of treatments, the samples are scanned with a SEM-BSE detector. The resultant images were further processed using a digital image processing method (DIP) to obtain quantitative characteristics of the ITZ. The surface morphology is characterized at the pixel level based on the digital image. Thereafter, K-means clustering method is used to illustrate the effect of surface roughness on ITZ formation.


Assuntos
Processamento de Imagem Assistida por Computador , Cerâmica/química , Porosidade , Propriedades de Superfície , Tomografia Computadorizada por Raios X
20.
ACS Appl Mater Interfaces ; 11(32): 29242-29254, 2019 Aug 14.
Artigo em Inglês | MEDLINE | ID: mdl-31319034

RESUMO

There is a constant drive to develop ultra-high-performance multifunctional coatings for existing construction used in modern engineering technologies. For these materials to be used in unsound infrastructure protections, they are required to present enhanced robustness while bearing functionalities to meet multiple uses. Single-function coating is not smart enough to provide satisfactory protection, and the preparation process of multifunctional materials is complex, costly, and provides poor durability. Thus, existing coatings are not suitable to generate an intelligent closed-loop protection system. Herein, we report an innovative 5S multifunctional intelligent coating (5SC) for existing construction materials with superdurable, superhydrophobic, self-monitoring, self-heating, and self-healing properties. The 5SC material showed highly durable superhydrophobic properties as revealed by the main failure tests of building materials including physical friction (abrasion, scratching), 100% tensile strain, photoaging (3000 h of ultraviolet (UV) aging), acid corrosion (concentrated hydrochloric acid and sulfuric acid), and freeze-thaw aging (salty solution). The coated surface was highly sensitive to pressure, with monitoring thresholds from 1 to 30 000 N per 0.01 m2. It showed an early heating rate as high as 6 °C/min while maintaining very good self-monitoring and ice-melting drainage performance to protect the existing structures. This novel composite material is suitable for constructions in extreme areas where corrosion and freeze-thaw damage can occur. This multifunctional material presents a very broad range of applications and development potential in the construction field.

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