Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 192
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
J Diabetes ; 2019 Nov 07.
Artigo em Inglês | MEDLINE | ID: mdl-31697444

RESUMO

BACKGROUND: Perioperative hyperglycemia was associated with postoperative infection, and proper management of perioperative glucose has become critical in improving the prognosis of patients. METHODS: 1015 diabetic patients who underwent surgery and received insulin treatment for their hyperglycemia in our hospital were retrospectively reviewed. According to propensity matching, we obtained 253 pairs of patients from group received continuous subcutaneous insulin infusion therapy (CSII group) and the group received insulin injection therapy (non-CSII group). Perioperative glucose levels and corresponding outcomes were compared between the two groups. RESULTS: Compared with non-CSII group, CSII group had lower fasting and mean glucose levels, lower incidence of fever (operation day: 18.6% vs 10.2%; P = 0.014; first postoperative day: 55.1% vs 34.7%; P<0.001) and positive rate of postoperative secretion culture (6.3% vs 1.2%; P = 0.004), shorter time of antibiotics use (total antibiotics use: P = 0.002; postoperative antibiotics use: P<0.001) and hospital stays (P<0.001). However, there was no difference in the total medical expenditure between the two groups (P = 0.499). Further analysis showed that CSII therapy was superior to multiple daily insulin injection therapy (MDI) therapy in its effect on infection and other postoperative outcomes when 64 pairs of patients from the CSII group and MDI group of non-CSII group were compared. CONCLUSIONS: CSII therapy provide better perioperative glucose control and lower risk of postoperative infection, without increasing the total medical expenditure. This article is protected by copyright. All rights reserved.

2.
Artigo em Inglês | MEDLINE | ID: mdl-31589358

RESUMO

Modulation of the electronic structure of metal catalysts is an effective approach to optimize the electrocatalytic activity. Herein, we show a surprisingly strong activation effect of black phosphorus (BP) on platinum (Pt) catalysts to give greatly enhanced catalytic activity in the hydrogen evolution reaction (HER). The unique and negative binding energy between BP and Pt leads to spontaneous formation of Pt-P bonds producing strong synergistic ligand effects on the Pt nanoparticles. No Pt-P bonds are formed with red phosphorus which is another allotrope of P. By controlling the number of Pt-P bonds, 3.5-fold enhancement in the HER activity can be achieved from the BP-activated Pt catalyst and the activity is 6.1 times higher than that of the state-of-the-art commercial Pt/C catalyst. The BP-activated Pt catalyst exhibits a current density of 82.89 mA cm-2 with only 1 µg of Pt in 1 m KOH at an overpotential of 70 mV.

3.
ACS Appl Mater Interfaces ; 11(41): 37787-37795, 2019 Oct 16.
Artigo em Inglês | MEDLINE | ID: mdl-31553153

RESUMO

Economical and highly effective catalysts are crucial to the electrocatalytic hydrogen evolution reaction (HER), and few-layer black phosphorus (phosphorene) is a promising candidate because of the high carrier mobility, large specific surface area, and tunable physicochemical characteristics. However, the HER activity of phosphorene is limited by the weak hydrogen adsorption ability on the basal plane. In this work, optimal active sites are created to modulate the electronic structure of phosphorene to improve the HER activity and the effectiveness is investigated theoretically by density-functional theory calculation and verified experimentally. The edges and defects affect the electronic density of states, and a linear relationship between the HER activity and lowest unoccupied states (εLUS) is discovered. The medium εLUS value corresponds to the suitable hydrogen adsorption strength. Experiments are designed and performed to verify the prediction, and our results show that a smaller phosphorene moiety with more edges and defects exhibits better HER activity and surface doping with metal adatoms improves the catalytic performance. The results suggest that modified phosphorene has large potential in efficient HER and provides a convenient standard to explore ideal electrocatalysts.

4.
Opt Express ; 27(15): 21741-21749, 2019 Jul 22.
Artigo em Inglês | MEDLINE | ID: mdl-31510245

RESUMO

The nonlinear optical properties of Bi2Se3 nanosheets of different diameters were studied using the femtosecond Z-scan technique. As the excitation wavelength increased from that for resonant absorption to non-resonant absorption, the nonlinear absorption of the smaller nanosheets with diameter of 30 or 80 nm changed from saturation to reverse saturation and the corresponding relaxation times decreased, unlike for larger nanosheets with diameter of 2000nm. The more sensitive nonlinear refractive index changed from positive to negative for all the nanosheets, when the excitation wavelengths were near-resonance absorption wavelengths. A simplified model similar to noble metal nanomaterials explains the observations suitably. The reversal in optical nonlinearities of Bi2Se3 nanosheets vastly enhances their properties.

6.
J Invest Surg ; : 1-9, 2019 Sep 25.
Artigo em Inglês | MEDLINE | ID: mdl-31552764

RESUMO

Background: Although the posterolateral approach is considered to carry a higher early dislocation rate after total hip arthroplasty, posterior soft tissue repair techniques make up for this limitation. Through-bone and through-tendon repair techniques are the two most commonly used techniques. This study aimed to comprehensively compare these techniques and give more evidence-based references for orthopedists. Methods: This retrospective study enrolled 87 patients who underwent posterior soft tissue repair with total hip arthroplasty via the posterolateral approach. The posterior capsular and external rotators were reconstructed to the greater trochanter through drill holes (through-bone, n = 46) or gluteus medius tendon (through-tendon, n = 41). Early dislocation rate, repair-related complications, postoperative pain (visual analog scale, VAS), hip joint function (Harris Hip Scale, HHS), patient satisfaction, and operation-related indexes were evaluated. Results: The discrepancy in early dislocation between the two cohorts was not statistically significant. Operation-related indexes were not significantly different between the two cohorts, except for the postoperative drainage volume (229.46 mL vs. 172.07 mL, p=.013). No patient sustained greater trochanteric fracture and sciatic nerve injury. Each group achieved significant improvements in HHS and VAS scores compared with preoperative values. No statistically significant discrepancy was found in HHS scores between the two groups at the same period, while VAS scores were significantly lower in the through-bone group at 1 week (4.93 vs. 5.68, p=.026) and 1 month (1.72 vs. 1.99, p=.038) after surgery. Higher patient satisfaction was observed in the through-bone group. Conclusions: Although no statistical discrepancy in the early dislocation rate between through-bone and through-tendon repair techniques was observed, lower pain scores and higher patient satisfaction supported the former. We recommend that through-bone repair technique should be chosen first by orthopedists when performing reconstruction of the posterior soft tissue in total hip arthroplasty via a posterolateral approach.

7.
Chem Commun (Camb) ; 55(76): 11406-11409, 2019 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-31482908

RESUMO

We report a novel metal-corrosion route beyond traditional top-down or bottom-up strategies for the mass production of 2D TMOs with a self-supported structure. The self-supported 2D Co3O4, a typical TMO, exhibits excellent electrocatalytic activity and stability in the oxygen evolution reaction surpassing those of commercial precious metal RuO2 catalysts at high currents.

8.
ACS Sens ; 4(9): 2303-2310, 2019 Sep 27.
Artigo em Inglês | MEDLINE | ID: mdl-31385492

RESUMO

A reliable surface-enhanced Raman scattering (SERS) substrate composed of two-dimensional (2D) MXene (Ti3C2Tx) nanosheets and gold nanorods (AuNRs) is designed and fabricated for sensitive detection of organic pollutants. The AuNRs are uniformly distributed on the surface of the 2D MXene nanosheets because of the strong electrostatic interactions, forming abundant SERS hot spots. The MXene/AuNR SERS substrate exhibits high sensitivity and excellent reproducibility in the determination of common organic dyes such as rhodamine 6G, crystal violet, and malachite green. The detection limits are 1 × 10-12, 1 × 10-12, and 1 × 10-10 M, and relative standard deviations determined from 13 areas on each sample are 18.1, 10.1, and 15.6%, respectively. In the determination of more complex organic pesticides and pollutants, the substrate also shows excellent sensitivity and quantitative detection, and the detection limits for thiram and diquat of 1 × 10-10 and 1 × 10-8 M, respectively, are much lower than the contaminant levels stipulated by the US Environmental Protection Agency. The MXene/AuNR composite constitutes an efficient SERS platform for reliable and high-sensitivity environmental analysis and food safety monitoring.

9.
JAMA Cardiol ; 2019 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-31365039

RESUMO

Importance: Whether optimal cardiovascular health metrics may counteract the risk of cardiovascular events among patients with prediabetes or diabetes is unclear. Objective: To investigate the associations of ideal cardiovascular health metrics (ICVHMs) with subsequent development of cardiovascular disease (CVD) among participants with prediabetes or diabetes as compared with participants with normal glucose regulation. Design, Setting, and Participants: The China Cardiometabolic Disease and Cancer Cohort Study was a nationwide, population-based, prospective cohort study of 20 communities from various geographic regions in China. The study included 111 765 participants who were free from CVD or cancer at baseline. Data were analyzed between 2011 and 2016. Exposures: Prediabetes and diabetes were defined according to the American Diabetes Association 2010 criteria. Seven ICVHMs were adapted from the American Heart Association recommendations. Main Outcomes and Measures: The composite of incident fatal or nonfatal CVD, including cardiovascular death, myocardial infarction, stroke, and hospitalized or treated heart failure. Results: Of the 111 765 participants, 24 881 (22.3%) had normal glucose regulation, 61 024 (54.6%) had prediabetes, and 25 860 (23.1%) had diabetes. Mean (SD) age ranged from 52.9 (8.6) years to 59.4 (8.7) years. Compared with participants with normal glucose regulation, among participants with prediabetes, the multivariable-adjusted hazard ratio for CVD was 1.34 (95% CI, 1.16-1.55) for participants who had 1 ICVHM or less and 0.57 (95% CI, 0.43-0.75) for participants who had at least 5 ICVHMs; among participants with diabetes, the hazard ratios for CVD were 2.05 (95% CI, 1.76-2.38) and 0.80 (95% CI, 0.56-1.15) for participants who had 1 ICVHM or less and at least 5 ICVHMs, respectively. Such pattern of association between ICVHM and CVD was more prominent for participants younger than 55 years (prediabetes and at least 5 ICVHMs: hazard ratio [HR], 0.32; 95% CI, 0.16-0.63; 1 ICVHM or less: HR, 1.58, 95% CI, 1.13-2.21; diabetes and at least 5 ICVHMs: HR, 0.99; 95% CI, 0.44-2.26; 1 ICVHM or less: HR, 2.46; 95% CI, 1.71-3.54; compared with normal glucose regulation) than for participants 65 years or older (prediabetes and at least 5 ICVHMs: HR, 0.80; 95% CI, 0.50-1.26; 1 ICVHM or less: HR, 1.01; 95% CI, 0.79-1.31; diabetes and at least 5 ICVHMs: HR, 0.79; 95% CI, 0.46-1.35; 1 ICVHM or less: HR, 1.73; 95% CI, 1.36-2.22, compared with normal glucose regulation; P values for interaction ≤.02). Additionally, the hazard ratio for CVD per additional ICVHM was 0.82 (95% CI, 0.79-0.86) among participants with prediabetes and was 0.85 (95% CI, 0.80-0.89) among participants with diabetes. Conclusions and Relevance: Participants with prediabetes or diabetes who had 5 or more ICVHMs exhibited lower or no significant excess CVD risks compared with the participants with normal glucose regulation.

10.
Nanoscale ; 11(28): 13269-13281, 2019 Jul 28.
Artigo em Inglês | MEDLINE | ID: mdl-31276146

RESUMO

To develop flexible microwave absorbers with strong attenuation capability has become a formidable challenge for applications of camouflage, stealth, and anti-electromagnetic pollution. Herein, a series of highly uniform cotton cloth@MnO2 (CC@MnO2) hierarchical structures with superior absorption performances were fabricated by simultaneously changing their intrinsic (α/δ phase) and extrinsic (2D/1D geometry) characteristics. The distinct absorption capability was dominantly contributed by the vertically grown dielectric MnO2 1D nanotube and conductive CC substrate, which could serve as a highly oriented backbone to ensure rapid electron transportation. Therefore, a well-designed CC@MnO2 sample (α phase instead of the δ phase) exhibits the best absorption performance. The maximum reflection loss (RL) is -53.2 dB at 5.4 GHz and the effective bandwidth is 5.84 GHz for a thickness of only 2 mm. This unique structure exhibits polarization, conduction loss, and strong dissipation capability, which can be attributed to the high density of accumulated charges trapped at the interface, as confirmed by the electron holography analysis. Meanwhile, the MnO2 coating does not affect the original flexibility of the CC and yields a massive interface and electronic conduction path. It is expected that CC@MnO2 might shed a new light on the design of microwave absorbers.

11.
Small ; 15(36): e1902885, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31310052

RESUMO

Core@shell structures have been attracting extensive attention to boost microwave absorption (MA) performance due to the unique interfacial polarization. However, it still remains a challenge to synthesize sophisticated 1D semiconductor-based materials with excellent MA competence. Herein, a hierarchical cable-like TiO2 @Fe3 O4 @PPy is fabricated by a sequential process of solvothermal treatment and polymerization. The complex permittivity of ternary composites can be optimized by tunable PPy coating thickness to improve the loss ability. The maximum reflection loss can reach -61.8 dB with a thickness of 3.2 mm while the efficient absorption bandwidth can achieve over 6.0 GHz, which involves the X and Ku band at only a 2.2 mm thickness. Importantly, the heterojunction contacts constructed by PPy-Fe3 O4 and Fe3 O4 -TiO2 contribute to the enhanced polarization loss. Besides, the configuration of magnetic Fe3 O4 sandwiched between dielectric TiO2 and PPy facilitates the magnetic stray field to radiate into the TiO2 core and out of the PPy shell, which significantly promotes magnetic-dielectric synergy. Electron holography validates the distinct charge distribution and magnetic coupling. The new findings might shed light on novel structures for functional core@shell composites and the design of semiconductor-based materials for microwave absorption.

12.
Nano Lett ; 19(8): 5587-5594, 2019 08 14.
Artigo em Inglês | MEDLINE | ID: mdl-31260628

RESUMO

In breast cancer chemophotothermal therapy, it is a great challenge for the development of multifunctional nanoagents for precision targeting and the effective treatment of tumors, especially for metastasis. Herein, we successfully design and synthesize a multifunctional black phosphorus (BP)-based nanoagent, BP/DTX@PLGA, to address this challenge. In this composite nanoagent, BP quantum dots (BPQDs) are loaded into poly(lactic-co-glycolic acid) (PLGA) with additional conjugation of a chemotherapeutic agent, docetaxel (DTX). The in vivo distribution results demonstrate that BP/DTX@PLGA shows striking tropism for targeting both primary tumors and lung metastatic tumors. Moreover, BP/DTX@PLGA exhibits outstanding controllable chemophotothermal combinatory therapeutics, which dramatically improves the efficacy of photothermal tumor ablation when combined with near-light irradiation. Mechanistically, accelerated DTX release from the nanocomplex upon heating and thermal treatment per se synergistically incurs apoptosis-dependent cell death, resulting in the elimination of lung metastasis. Meanwhile, in vitro and in vivo results further confirm that BP/DTX@PLGA possesses good biocompatibility. This study provides a promising BP-based multimodal nanoagent to constrain cancer metastasis.

14.
J Diabetes ; 2019 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-31170331

RESUMO

BACKGROUND: This study investigated the association between birth weight and diabetes in a Chinese population, and the effects of body mass index (BMI) and lifestyle factors in later life on this association. METHODS: Data from 49 118 participants aged ≥40 years with recalled birth weight from the Risk Evaluation of cAncers in Chinese diabeTic Individuals: a lONgitudinal (REACTION) study, a nationwide population-based cohort, were used. Diabetes diagnosis was based on oral glucose tolerance tests and HbA1c measurements. Logistic regression models were used to evaluate the association of birth weight and risk of diabetes in later life. RESULTS: Increased risk of diabetes was associated with lower or higher birth weight. Compared with individuals with a birth weight of 2500 to 3499 g, the odds ratios (ORs) and 95% confidence intervals (CIs) of diabetes for individuals with a birth weight of <2500, between 3500 and 3999, and ≥4000 g were 1.28 (1.11-1.47), 1.11 (1.04-1.19), and 1.20 (1.07-1.34), respectively. Significant associations were prominent in participants with a current BMI ≥24 kg/m2 , but not detected in those with a normal BMI (OR 1.20 [95% CI 0.96-1.49], 1.11 [95% CI 0.98-1.25], and 1.10 [95% CI 0.89-1.37], respectively). Moreover, there was no increased risk of diabetes in individuals with a low birth weight but with healthy dietary habits (OR 0.94; 95% CI 0.68-1.29) or ideal physical activity (OR 1.41; 95% CI 0.97-2.04). CONCLUSIONS: A U-shaped association was observed between birth weight and the risk of diabetes. Healthy lifestyles (healthy dietary habits or ideal physical activity) may eliminate the negative effects of low birth weight in the development of diabetes, but not the effect of high birth weight.

15.
Diabetes Care ; 42(8): 1539-1548, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-31152120

RESUMO

OBJECTIVE: Uncertainty remains regarding the predictive value of various glycemic measures as they relate to the risk of diabetes and its complications. Using the cutoffs recommended by the American Diabetes Association's 2010 criteria, we determined the associations of fasting plasma glucose (FPG), 2-h postload glucose (2h-PG), and HbA1c with the outcomes. RESEARCH DESIGN AND METHODS: Baseline medical history, FPG, 2h-PG, and HbA1c were obtained from a population-based cohort of 193,846 adults aged ≥40 years in China during 2011-2012. A follow-up visit was conducted during 2014-2016 in order to assess incident diabetes, cardiovascular disease (CVD), cancer, and mortality. RESULTS: We documented 8,063 cases of diabetes, 3,014 CVD-related events, 1,624 cases of cancer, and 2,409 deaths during up to 5 years of follow-up. Multivariable-adjusted risk ratios (95% CIs) of diabetes associated with prediabetes based on FPG of 100-125 mg/dL, 2h-PG of 140-199 mg/dL, or HbA1c of 5.7-6.4% (39-47 mmol/mol) were 1.60 (1.43-1.79), 2.72 (2.43-3.04), and 1.49 (1.36-1.62), respectively. Restricted cubic spline analyses suggested J-shaped associations of FPG, 2h-PG, and HbA1c levels with CVD, cancer, and mortality. Multivariable-adjusted hazard ratios (95% CIs) associated with untreated diabetes based on FPG ≥126 mg/dL, 2h-PG ≥200 mg/dL, or HbA1c ≥6.5% (48 mmol/mol) were 1.18 (1.05-1.33), 1.31 (1.18-1.45), and 1.20 (1.07-1.34) for CVD; 1.10 (0.92-1.32), 1.44 (1.25-1.67), and 1.08 (0.92-1.28) for cancer; and 1.37 (1.20-1.57), 1.57 (1.41-1.76), and 1.33 (1.17-1.52) for mortality, respectively. 2h-PG remained significantly associated with outcomes in models including FPG and HbA1c as spline terms. Furthermore, 2h-PG significantly improved the ability of the C statistic to predict diabetes, CVD, and mortality. CONCLUSIONS: 2h-PG remains independently predictive of outcomes in models including FPG and HbA1c. Therefore, in addition to FPG and HbA1c, routine testing of 2h-PG should be considered in order to better assess the risks of outcomes.

16.
Chemistry ; 25(47): 10995-11006, 2019 Aug 22.
Artigo em Inglês | MEDLINE | ID: mdl-31206798

RESUMO

Low-dimensional nanomaterials (LDNs) are receiving increasing attention in cancer therapy owing to their unique properties, especially the large surface area-to-volume ratio. LDNs such as metallic nanoparticles (NPs), hydroxyapatite NPs, graphene derivatives, and black phosphorus (BP) nanosheets have been proposed for drug delivery, photothermal/photodynamic therapies, and multimodal theranostic treatments. The therapeutic effectiveness is mainly based on the physical characteristics of LDNs, but their inherent bioactivity has not been fully capitalized. In this Minireview, recent advances in the anti-cancer effects of various types of LDNs with inherent chemotherapeutic bioactivity are described and the bioactivity mechanisms are discussed on the cellular and molecular levels. BP, one of the newest and exciting members of the LDN family, is highlighted owing to the excellent inherent bioactivity, selectivity, and biocompatibility in cancer therapy. LDNs and related derivatives possess inherent bioactivity and selective chemotherapeutic effects suggesting large potential as nanostructured anti-cancer agents in cancer therapy.


Assuntos
Nanoestruturas/química , Neoplasias/tratamento farmacológico , Nanomedicina Teranóstica , Materiais Biocompatíveis/química , Materiais Biocompatíveis/uso terapêutico , Fosfatos de Cálcio/química , Fosfatos de Cálcio/uso terapêutico , Nanopartículas Metálicas/química , Nanopartículas Metálicas/uso terapêutico , Nanoestruturas/uso terapêutico , Fósforo/química , Fósforo/uso terapêutico
17.
ACS Appl Mater Interfaces ; 11(31): 27521-27528, 2019 Aug 07.
Artigo em Inglês | MEDLINE | ID: mdl-31180631

RESUMO

Near-infrared-II (NIR-II) biowindow is appealing from the perspectives of larger maximum permissible exposure in comparison with the near-infrared-I biowindow, so the NIR-II-responsive drug-delivery nanoplatform is highly desirable. In this work, two-dimensional InSe nanosheets (InSe NSs) are modified with poly(ethylene glycol) and evaluated as an effective NIR-II-responsive cancer treatment nanoplatform. The InSe NSs synthesized by liquid exfoliation exhibit prominent NIR-II-responsive photothermal conversion efficiency (39.5%) and photothermal stability. Moreover, the InSe NSs have a doxorubicin (DOX) loading capacity as high as 93.6%, along with excellent NIR-II-responsive DOX release characteristic. The superior synergistic chemo/photothermal effects have also been demonstrated by the in vitro experiments in killing cancer cells. In combination with good biocompatibility, the InSe NSs have great potential in therapeutic applications.

18.
Biosens Bioelectron ; 137: 140-147, 2019 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-31096080

RESUMO

We propose the first black phosphorus (BP) - fiber optic biosensor for ultrasensitive diagnosis of human neuron-specific enolase (NSE) cancer biomarkers. A novel optical-nano configuration has been exploited by integrating BP nanosheets with a largely tilted fiber grating (BP-TFG), where the BP is bio-functionalized by the poly-L-lysine acting as a critical cross-linker to facilitate bio-nano-photonic interface with extremely enhanced light-matter interaction. BP nanosheets are synthesized by a liquid ultrasonication-based exfoliation and deposited on fiber device by an in-situ layer-by-layer method. The BP-induced optical modulation effects in terms of thickness-tunable feature, polarization-dependence and enhanced light-matter interaction are experimentally investigated. The anti-NSE immobilized BP-TFG biosensor has been implemented to detect NSE biomarkers demonstrating ultrahigh sensitivity with limit of detection down to 1.0 pg/mL, which is 4 orders magnitude lower than NSE cut-off value of small cell lung cancer. The enhanced sensitivity of BP-TFG is 100-fold higher than graphene oxide or AuNPs based biosensors. We believe that BP-fiber optic configuration opens a new bio-nano-photonic platform for the applications in healthcare, biomedical, food safety and environmental monitoring.


Assuntos
Biomarcadores Tumorais/isolamento & purificação , Técnicas Biossensoriais , Neoplasias/diagnóstico , Fosfopiruvato Hidratase/isolamento & purificação , Biomarcadores Tumorais/química , Tecnologia de Fibra Óptica , Ouro/química , Grafite/química , Humanos , Limite de Detecção , Nanopartículas Metálicas/química , Fosfopiruvato Hidratase/química , Fósforo/química
19.
Small ; 15(18): e1900900, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30957426

RESUMO

A novel strategy is used to design large-scale polarized carbon-based dielectric composites with sufficient interaction to electromagnetic waves. Highly uniform polar zinc oxide arrays are vertically grown on a flexible conductive carbon cloth substrate (CC@ZnO) via an in situ orientation growth process. Anion regulation is found to be a key factor to the morphology of hierarchical ZnO arrays including single-rod, cluster and tetrapod-shaped. As a typical dielectric loss hybrid composite, the electromagnetic parameters of the CC@ZnO system and charge density distribution in polarized ZnO rods confirm that the 3D intertwined carbon cloth is used as a conductive network to provide ballistic electron transportation. Moreover, the defect-rich ZnO arrays are well in contact with the CC substrate, favoring interface polarization, multiscattering, as well as impedance matching. Surprisingly, the efficient absorption bandwidth of the CC@ZnO-1 composite can reach 10.6 GHz, covering all X and Ku bands. The oriented ZnO possesses oxygen vacancies and exposure to a large amount of intrinsic polar surfaces, encouraging the polarization behavior under microwave frequency. Optimized CC@ZnO materials exhibit fast electron transportation, strong microwave energy dissipation, and superior wide absorption. The results suggest that the CC@ZnO composites have promising potential as flexible, tuning, and broadband microwave absorbers.

20.
Complement Ther Clin Pract ; 35: 296-300, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-31003673

RESUMO

PURPOSE: To use Traditional Chinese Medicine (TCM) and Western approaches to improve gross motor function and activities of daily living (ADL) in children with spastic cerebral palsy. METHODS: Children were randomly divided into a treatment group, which received scalp acupuncture combined with exercise therapy and conventional rehabilitation training, and a control group, which received conventional rehabilitation training alone. Study subjects' gross motor function (gross motor function measure-88 [GMFM-88]) and ADL were evaluated before and after therapy. RESULTS: GMFM-88 and ADL scores were significantly improved in both groups after therapy, but the within group differences in post- and pre-therapy GMFM-88 and ADL scores were significantly higher in the treatment group compared to the control group. CONCLUSION: Scalp acupuncture combined with exercise therapy and conventional rehabilitation training can significantly improve gross motor function and the ability to perform ADLs in children with spastic cerebral palsy compared to conventional rehabilitation training alone.


Assuntos
Terapia por Acupuntura/métodos , Paralisia Cerebral/reabilitação , Terapia por Exercício/métodos , Medicina Tradicional Chinesa/métodos , Atividade Motora , Espasticidade Muscular/terapia , Paralisia Cerebral/fisiopatologia , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Couro Cabeludo
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA