TA

先天性肌病
  • 文章类型: Journal Article
    智能可穿戴纺织品已经引起了人们的关注和进步,特别是在热疗和健康监测领域。作为智能可穿戴纺织品的重要组成部分,导电纤维有望具有长期稳定和持久的导电性。在这项工作中,开发了一种基于单宁酸/聚吡咯的高度可拉伸和导电纤维。通过将TA掺杂到PPy中形成导电网络,导致PPy在PU表面的拉伸性增强。TA还改善了PPy和PU之间的界面相互作用,以获得更牢固的PPy附着,实现高导电性(0.89±0.23S/cm)和耐久性。此外,可拉伸导电纤维还表现出对电的智能反应,光,和变形。它们可以在电和光的作用下用作热源(在4V下温度升高到42°C,在太阳辐射刺激下温度升高到54°C),还可以监测人类的运动,使它们在热疗纺织品和智能传感设备中具有潜在的应用。使用能够全天候热疗和运动检测的纺织品成型技术制造了基于PU/TA/PPy的多合一智能可穿戴系统。这种光纤制造技术和集成系统为智能可穿戴设备的未来发展提供了见解。
    Intelligent wearable textiles have garnered attention and advancement, particularly in the realms of thermotherapy and health monitoring. As a critical component of intelligent wearable textiles, conductive fibers are expected to have long-term stable and durable conductivity. In this work, a highly stretchable and conductive fiber based on tannic acid/polypyrrole was developed. The conductive network was formed by doping TA into PPy, resulting in enhanced stretchability of PPy on the surface of PU. TA also improves the interface interaction between PPy and PU to gain more firm attachment of PPy, which achieves high conductivity (0.89 ± 0.23 S/cm) and durability. Furthermore, the stretchable conductive fiber also exhibited intelligent responses to electricity, light, and deformation. They can serve as heat sources under the action of electricity and light (temperature was raised to 42 °C under 4 V and 54 °C under solar radiation stimuli) and can also monitor the movements of humans, making them potential applications in thermotherapy textiles and intelligent sensing equipment. A PU/TA/PPy-based all-in-one smart wearable system was fabricated using textile molding technology capable of all-weather thermal therapy and motion detection. This fiber fabrication technology and integrated system offer insights for the future development of smart wearable devices.
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  • 文章类型: Journal Article
    使用反应性空心阴极气流溅射(GFS)在玻璃衬底上制备了SnO2和钽掺杂的SnO2(TTO)薄膜。溅射之前是真空下的原位加热过程。氧化锡膜的电阻率降低到2.02×10-3Ωcm的显着低点,载流子浓度为2.55×1020cm-3,迁移率为12.11cm2V-1s-1。随着衬底温度的升高,薄膜电阻率下降。值得注意的是,在270°C的衬底温度下,与较高温度相比,Ta掺杂对薄膜电阻率和载流子浓度的影响明显更强。提高衬底温度和Ta掺杂导致较低的折射率(η)。这种效应在较高的温度下一直很强,归因于较高的无膜载流子浓度(4.54×1020cm-3),而较低的温度(2.35×1020cm-3)。通过扫描电子显微镜(SEM)对薄膜的结构进行了表征,X射线衍射(XRD)和原子力显微镜(AFM)。讨论了薄膜生长的优选方向。氧化锡薄膜的成功和可重复制造强调了气流溅射(GFS)技术的优势。GFS在各种氧气流量水平下提供稳定的操作条件,无需目标氧化控制,这是在管理气体状态和薄膜质量时在磁控溅射中所需的。
    SnO2 and tantalum doped SnO2 (TTO) thin films were prepared using reactive hollow cathode gas flow sputtering (GFS) on glass substrates. An in-situ heating process under vacuum preceded the sputtering. The resistivity of the tin oxide films was reduced to a remarkable low of 2.02 × 10-3 Ω cm, with a carrier concentration of 2.55 × 1020 cm-3 and a mobility of 12.11 cm2V-1s-1. As the substrate temperature increased, the film resistivity decreased. Notably, at a substrate temperature of 270 °C, the effect of Ta doping on the film resistivity and carrier concentration was significantly stronger compared to higher temperatures. Elevating the substrate temperature and Ta doping resulted in a lower refractive index (n). This effect was consistently strong at higher temperatures, attributed to the higher film-free carrier concentration (4.54 × 1020 cm-3) compared to lower temperatures (2.35 × 1020 cm-3). The film\'s structure was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and atomic force microscope (AFM). The preferred direction of film growth was discussed. The successful and reproducible fabrication of tin oxide films underscores the advantages of gas flow sputtering (GFS) technology. GFS offers stable operating conditions across various oxygen flow levels without requiring target oxidization control, as is required in magnetron sputtering when managing gas status and film quality.
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  • 文章类型: Journal Article
    网络成瘾(IA)的高患病率已成为一个全球性问题,深刻地影响着人们的心理健康和执行功能。实证研究表明,特质焦虑(TA)是成瘾行为的最有力预测因素之一。本研究调查了TA和IA之间关联的神经和社会心理机制。
    首先,我们测试了TA和IA之间的相关性。然后,我们使用线性混合效应(LME)模型研究了TA对IA的纵向影响。其次,基于连接体的预测模型(CPM)用于探索TA的神经标志物,我们测试了确定的TA神经标志物是否可以预测IA。最后,应激性生活事件和默认模式网络(DMN)被认为是中介变量,以探讨TA和IA之间的关系。
    发现TA和IA之间存在显着正相关,高TA组显示出随时间的较高IA。CPM结果表明,认知控制和情绪调节回路以及DMN的功能连通性与TA显着相关。此外,发现TA和IA的神经标志物之间存在显著关联.值得注意的是,CPM结果均在独立样本中得到验证.调解结果表明,紧张的生活事件和相关的功能连接介导了TA和IA之间的关联。
    本研究的发现有助于更深入地理解连接TA和IA的神经和社会心理机制,并为发展神经和心理干预提供新的方向。
    UNASSIGNED: The high prevalence of internet addiction (IA) has become a worldwide problem that profoundly affects people\'s mental health and executive function. Empirical studies have suggested trait anxiety (TA) as one of the most robust predictors of addictive behaviors. The present study investigated the neural and socio-psychological mechanisms underlying the association between TA and IA.
    UNASSIGNED: Firstly, we tested the correlation between TA and IA. Then we investigated the longitudinal influence of TA on IA using a linear mixed effect (LME) model. Secondly, connectome-based predictive modeling (CPM) was employed to explore neuromarkers of TA, and we tested whether the identified neuromarkers of TA can predict IA. Lastly, stressful life events and default mode network (DMN) were considered as mediating variables to explore the relationship between TA and IA.
    UNASSIGNED: A significant positive correlation between TA and IA was found and the high TA group demonstrated higher IA across time. CPM results revealed that the functional connectivity of cognitive control and emotion-regulation circuits and DMN were significantly correlated with TA. Furthermore, a significant association was found between the neuromarkers of TA and IA. Notably, the CPM results were all validated in an independent sample. The results of mediation demonstrated that stressful life events and correlated functional connectivity mediated the association between TA and IA.
    UNASSIGNED: Findings of the present study facilitate a deeper understanding of the neural and socio-psychological mechanisms linking TA and IA and provide new directions for developing neural and psychological interventions.
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  • 文章类型: Journal Article
    Intumescent flame retardants (IFR) are an excellent solution to the problem of easy combustion of polymers. Still, the negative effect of the addition of flame retardants is the decline of the mechanical properties of polymers. In this context, carbon nanotubes (CNTs) are modified with tannic acid (TA) and then wrapped on the surface of ammonium polyphosphate (APP) to construct a special intumescent flame retardant structure (CTAPP). The respective advantages of the three components in the structure are explained in detail, especially the role of CNTs with high thermal conductivity in the flame retardant system. Compared with pure natural rubber (NR), the peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) of the composites proposed with special structural flame retardants are decreased by 68.4%, 64.3%, and 49.3%, respectively, while the limiting oxygen index (LOI) increased to 28.6%. The TA-modified CNTs wrapped on the surface of APP can effectively reduce the mechanical damage caused by the flame retardant to the polymer. To sum up, the flame retardant structure of TA-modified CNTs wrapped on APP can effectively enhance the flame retardant properties of the NR matrix and reduce the negative impact on mechanics caused by adding APP flame retardant.
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  • 文章类型: Journal Article
    UNASSIGNED:本研究旨在评估白内障手术后角膜后散光的变化,为准确评估复曲面人工晶状体(IOL)植入前要矫正的全角膜散光(TA)提供理论依据。
    UNASSIGNED:纳入2017年1月至2018年9月在山西省眼科医院行超声乳化联合环面IOL植入术(AcrySofIQToricSN6AT2-T9)的62例(89只眼)。在五心检查期间,使用矢量分析分析了手术引起的后角膜散光(SIAPA)。
    未经评估:角膜散光(KA)的矢量方差,TA,“规则(WTR)散光”组和“整体患者”组的术前和术后角膜后散光(PA)均具有统计学意义(P<0.05)。在所有患者中,手术诱导的KA(SIAKA)和手术诱导的全角膜散光(SIATA)之间观察到统计学上的显着差异。包括那些有WTR散光的人。对于所有患者来说,SIAKA比SIATA小0.05±0.21D,对于患有WTR散光的患者,SIAKA小于SIATA0.09±0.22D。对于“违规(ATR)散光”组的患者,SIAKA和SIATA之间没有统计学上的显着差异,尽管SIAKA比SIATA大0.03±0.18D。当PA≤0.4D或KA≤2.0D时,SIAPA可以忽略。然而,当PA>0.4D或KA>2.0D时,忽视SIAPA引起的白内障手术切口会使SIAKA患者的WTR散光低估SIATA,而SIAKA在ATR散光患者中会导致SIATA的高估。
    UNASSIGNED:SIA对角膜后散光的影响可能对更精确地规划复曲面IOL植入具有重要作用,尤其是在术前角膜前散光或后散光较高的情况下。
    UNASSIGNED: This study aimed to evaluate the changes in posterior corneal astigmatism after cataract surgery and provide a theoretical basis to accurately evaluate the total corneal astigmatism (TA) to be corrected before toric intraocular lens (IOL) implantation.
    UNASSIGNED: Sixty-two patients (89 eyes) who underwent phacoemulsification combined with toric IOL implantation (AcrySof IQ Toric SN6AT2-T9) at Shanxi Eye Hospital between January 2017 and September 2018 were enrolled. Surgically induced astigmatism of the posterior cornea (SIAPA) was analysed using vector analysis during pentacam examination.
    UNASSIGNED: The vector variances of keratometric astigmatism (KA), TA, and posterior corneal astigmatism (PA) preoperatively and postoperatively in the \"with-the-rule (WTR) astigmatism\" group and \"overall patient\" group were statistically significant (P < 0.05). A statistically significant difference was observed between surgically induced KA (SIAKA) and surgically induced astigmatism of the total cornea (SIATA) for all patients, including those with WTR astigmatism. For all patients, SIAKA was less than SIATA by 0.05 ± 0.21 D, and for patients with WTR astigmatism, SIAKA was less than SIATA by 0.09 ± 0.22 D. For patients in the \"against-the-rule (ATR) astigmatism\" group, there were no statistically significant differences between SIAKA and SIATA, although SIAKA was greater than SIATA by 0.03 ± 0.18 D. When PA ≤0.4 D or KA ≤2.0 D, SIAPA can be ignored. However, when PA >0.4 D or KA >2.0 D, ignoring SIAPA caused by cataract surgery incision will cause SIAKA in patients with WTR astigmatism to underestimate SIATA, while SIAKA in patients with ATR astigmatism will cause an overestimation of SIATA.
    UNASSIGNED: SIA on the posterior corneal astigmatism may have a significant role on more precise planning of toric IOL implantation, especially in cases with higher preoperative anterior or posterior corneal astigmatism.
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  • 文章类型: Journal Article
    Tenuazonicacid(TA)是一种剧毒的霉菌毒素,主要由链格孢属真菌产生,广泛污染农业副产品。鉴于TA对粮食安全的威胁,建立快速、灵敏的TA检测方法对TA监测具有重要意义。在这项研究中,制备了平均直径接近17.25nm的金纳米粒子(AuNP),并且开发的基于AuNP的条带具有15分钟的测定时间,视觉检测限(LOD)为12.5ng/ml,阈值为100ng/ml。为了进一步提高灵敏度,制备了平均直径在50nm附近的多分支金纳米花(AuNF),并通过UV-VIS和TEM进行了表征,并且建立的基于AuNF的条带在15分钟内具有0.78ng/ml的视觉LOD和50ng/ml的阈值。两种测定法均用于测定苹果汁和番茄酱中的TA,与UHPLC-MS/MS的结果一致。因此,这些检测方法可用于实际样品中痕量TA的快速测定。
    Tenuazonic acid (TA) is a highly toxic mycotoxin mainly generated by the fungi of Alternaria genus and widely contaminates agricultural by-products. Given the threat of TA to food-security, it is very important to develop rapid and sensitive detection methods for TA monitoring. In this study, gold nano-particles (AuNP) with average diameter near 17.25 nm were prepared, and the developed AuNP-based strip has an assay time of 15 min with visual limit of detection (LOD) of 12.5 ng/ml and threshold of 100 ng/ml. To further improve sensitivity, multi-branched gold nano-flowers (AuNF) with average diameter near 50 nm were prepared and characterized by UV-VIS and TEM, and the established AuNF-based strip has visual LOD of 0.78 ng/ml and threshold of 50 ng/ml within 15 min. Both assays were applied to determine TA in apple juice and tomato ketchup, and the results were consistent with that of UHPLC-MS/MS. Thus, these assays could be applied for rapid determination of trace TA in real samples.
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  • 文章类型: Journal Article
    水果批次间的变化影响着便携式近红外光谱(NIRS)仪器的性能,进而决定了水果行业实际应用的成败。研究了模型开发和更新方法,以确定脐橙的可溶性固形物含量(SSC)和可滴定酸度(TA)。探索了建立偏最小二乘回归(PLSR)模型的预处理和变量选择方法。最好的模特,由二阶导数(2D)和归一化变量排序(VSN)相结合开发,可以预测SSC,但不能预测TA。预测均方根误差(RMSEP),SSC的预测决定系数(Rp2)和预测偏差比(RPD)为0.66°白利糖度,0.66和1.73。模型更新(MU)和斜率和偏差校正(SBC)的模型维护方法在预测具有Rp2的两个外部验证集的SSC方面取得了最好的结果,RMSEP和RPD为0.54,0.83°白利糖度,1.60和0.52,0.83°白利糖度,分别为1.65。结果表明,使用MU和SBC进行模型开发和更新可以提高便携式NIRS仪器预测脐橙SSC的鲁棒性。
    The variation of fruit among batches influences the performance of the portable near infrared spectroscopy (NIRS) instrument and then determines the success or failure for practical application in fruit industry. Model development and update methods were investigated for determining soluble solids contents (SSC) and titrable acidity (TA) of navel orange. The pretreatment and variable selection methods were explored for building partial least square regression (PLSR) models. The best models, developed by the combination of second derivative (2D) and variable sorting for normalization (VSN), could predict SSC but not TA. The root mean square error of prediction (RMSEP), coefficient of determination for prediction ( R p 2 ) and ratio of prediction to deviation (RPD) for SSC were 0.66 °Brix, 0.66 and 1.73. Model maintain methods of model update (MU) and slope and bias correction (SBC) achieved the best results in predicting SSC for two external validation sets with R p 2 , RMSEP and RPD of 0.54, 0.83 °Brix, 1.60 and 0.52, 0.83 °Brix, 1.65, respectively. The results suggested model development and update with MU and SBC could improve the robustness of the portable NIRS instrument in predicting SSC of navel orange.
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  • 文章类型: Journal Article
    生物质碳点(CDs)具有绿色的特点,无毒,便宜,而且准备简单,它们可用于发光相关领域。在这项研究中,红色,绿色,和蓝色发光CD是通过简单的水热法在碱性下合成的,中性,以及使用TA作为碳源和邻苯二醛作为共混物的酸性条件。这些CD的独特光学特性是由于它们的共轭程度不同,可以通过反应体系的pH值来控制。这三种生物质CD在发光二极管(LED)中具有良好的应用。通过将生物质CD与环氧树脂混合,温暖,在极其稳定的多色CD上成功构建了具有国际委员会(CIE)坐标(0.35,0.36)的冷白光LED。这项研究表明,这些生物质CD是白色LED照明的有前途的材料。
    Biomass carbon dots (CDs) have the characteristics of being green, nontoxic, inexpensive, and simple to prepare, and they can be used in luminescence-related fields. In this study, red, green, and blue luminescent CDs were synthesised by a simple hydrothermal method under alkaline, neutral, and acidic conditions using TA as carbon source and o-phthalaldehyde as blend. The unique optical properties of these CDs are due to the differences in their degrees of conjugation, which can be controlled by the pH value of the reaction system. These three kinds of biomass CDs have good applications in light-emitting diodes (LEDs). By mixing biomass CDs with epoxy resin, warm, and cold white LEDs with Commission Internationale de l\'Elcairage (CIE) coordinates (0.35, 0.36) were successfully constructed on extremely stable multicolour CDs. This study shows that these biomass CDs are a promising material for white LED lighting.
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  • 文章类型: Journal Article
    相变存储器(PCM)对于基于vonNeumann和新兴的神经形态计算系统的新应用具有广阔的前景。然而,利用PCM器件优势的一个关键挑战是在高温下实现这些器件的高速运行,这对于高效处理和可靠存储满负荷数据至关重要。在这里,我们报道了一种基于Ta掺杂碲化锑(Sb2Te)的新型PCM器件,同时具有高速特性和优异的高温特性,运行速度为2ns,>106周期的耐力,和140°C下的可逆切换Ta的高配位数和Ta与Sb/Te原子之间的强键有助于非晶结构的鲁棒性,提高了热稳定性。此外,三维极限中的小晶粒导致能源效率提高和层偏析风险降低,降低功耗,提高长期续航能力。我们对这种新的Ta-Sb2Te材料体系的发现可以促进具有改进性能和新颖应用的PCM的开发。
    Phase-change memory (PCM) has considerable promise for new applications based on von Neumann and emerging neuromorphic computing systems. However, a key challenge in harnessing the advantages of PCM devices is achieving high-speed operation of these devices at elevated temperatures, which is critical for the efficient processing and reliable storage of data at full capacity. Herein, we report a novel PCM device based on Ta-doped antimony telluride (Sb2Te), which exhibits both high-speed characteristics and excellent high-temperature characteristics, with an operation speed of 2 ns, endurance of > 106 cycles, and reversible switching at 140 °C. The high coordination number of Ta and the strong bonds between Ta and Sb/Te atoms contribute to the robustness of the amorphous structure, which improves the thermal stability. Furthermore, the small grains in the three-dimensional limit lead to an increased energy efficiency and a reduced risk of layer segregation, reducing the power consumption and improving the long-term endurance. Our findings for this new Ta-Sb2Te material system can facilitate the development of PCMs with improved performance and novel applications.
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  • 文章类型: Journal Article
    脓毒症引起的心肌功能障碍是脓毒症多器官功能障碍的特征之一,这与极高的死亡率相关,其特征是心肌顺应性受损。迄今为止,很少有有效的治疗方案可用于治疗脓毒症。据报道,单宁酸(TA)在败血症期间具有保护作用;然而,TA预防感染性心脏损伤的潜在机制仍然难以捉摸.本研究调查了TA在减轻脂多糖(LPS)诱导的H9C2心肌细胞凋亡中的潜在作用和潜在机制。H9C2细胞用LPS(15μg/ml)处理,TA(10μM)和TA+LPS;对照细胞仅用培养基处理。使用流式细胞术测量细胞凋亡,逆转录-定量PCR(RT-qPCR)和蛋白质印迹分析。此外,细胞活性氧(ROS)的水平,丙二醛和烟酰胺腺嘌呤二核苷酸磷酸进行评估。蛋白质印迹和RT-qPCR也用于检测内质网(ER)应激相关功能蛋白的表达水平。本研究结果表明,TA降低了LPS诱导的H9C2细胞损伤的程度,包括抑制ROS产生和ER应激(ERS)相关的细胞凋亡。ERS相关功能蛋白,包括激活转录因子6,蛋白激酶样内质网激酶,对TA处理的需要肌醇的酶1,剪接的X盒结合蛋白1和C/EBP同源蛋白被抑制。此外,ERS相关凋亡蛋白的表达水平,包括c-Jun氨基末端激酶,Bax,细胞色素c,用TA处理后,caspase‑3,caspase‑12和caspase‑9减少。此外,用ROS抑制剂N-乙酰半胱氨酸处理后,TA对LPS诱导的H9C2细胞的保护作用被部分抑制,这表明ROS介导的ERS相关凋亡和TA能够减少ROS介导的ERS相关凋亡。总的来说,本研究结果表明,TA对LPS诱导的H9C2细胞凋亡的保护作用可能与ROS介导的ERS的改善有关。这些发现可能有助于开发潜在的新型治疗方法来抑制心肌细胞损伤的进展。
    Sepsis‑induced myocardial dysfunction is one of the features of multiple organ dysfunction in sepsis, which is associated with extremely high mortality and is characterized by impaired myocardial compliance. To date, there are few effective treatment options available to cure sepsis. Tannic acid (TA) is reportedly protective during sepsis; however, the underlying mechanisms by which TA protects against septic heart injury remain elusive. The present study investigated the potential effects and underlying mechanisms of TA in alleviating lipopolysaccharide (LPS)‑induced H9C2 cardiomyocyte cell apoptosis. H9C2 cells were treated with LPS (15 µg/ml), TA (10 µM) and TA + LPS; control cells were treated with medium only. Apoptosis was measured using flow cytometry, reverse transcription‑quantitative PCR (RT‑qPCR) and western blot analysis. Additionally, the levels of cellular reactive oxygen species (ROS), malondialdehyde and nicotinamide adenine dinucleotide phosphate were evaluated. Western blotting and RT‑qPCR were also employed to detect the expression levels of endoplasmic reticulum (ER) stress‑associated functional proteins. The present findings demonstrated that TA reduced the degree of LPS‑induced H9C2 cell injury, including inhibition of ROS production and ER stress (ERS)‑associated apoptosis. ERS‑associated functional proteins, including activating transcription factor 6, protein kinase‑like ER kinase, inositol‑requiring enzyme 1, spliced X box‑binding protein 1 and C/EBP‑homologous protein were suppressed in response to TA treatment. Furthermore, the expression levels of ERS‑associated apoptotic proteins, including c‑Jun N‑terminal kinase, Bax, cytochrome c, caspase‑3, caspase‑12 and caspase‑9 were reduced following treatment with TA. Additionally, the protective effects of TA on LPS‑induced H9C2 cells were partially inhibited following treatment with the ROS inhibitor N‑acetylcysteine, which demonstrated that ROS mediated ERS‑associated apoptosis and TA was able to decrease ROS‑mediated ERS‑associated apoptosis. Collectively, the present findings demonstrated that the protective effects of TA against LPS‑induced H9C2 cell apoptosis may be associated with the amelioration of ROS‑mediated ERS. These findings may assist the development of potential novel therapeutic methods to inhibit the progression of myocardial cell injury.
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