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  • 文章类型: Journal Article
    据报道,泰国在人类和动物部门中使用抗菌药物的比例是世界上最高的。我们的参与项目旨在提高我们对泰国成年社区中抗菌药物使用和抗菌素耐药性(AMR)问题的理解,并共同创建AMR的本地相关解决方案,特别是那些注重提高认识,以改善泰国的相关政策。我们根据惠康的“响应对话”参与方法进行了一系列在线和面对面的“对话”,旨在汇集不同的声音来理解复杂的AMR问题并找到潜在的解决方案。这种方法使AMR的主要利益相关者和政策制定者能够直接听取社区和公众的意见,反之亦然。对话活动于2020年11月25日至2022年7月8日期间举行,我们在泰国与179位AMR主要利益相关者和公众进行了接触。发现的问题是:围绕抗菌药物和AMR存在很多误解;参与者认为围绕抗菌素耐药性的沟通和参与范围和影响有限;要求和服用抗生素治疗自限性疾病是泰国的社会规范;而且似乎有大量廉价的抗菌药物。为了减轻AMR的传播,与会者建议,围绕AMR的信息应该针对目标受众,应该有更多的举措来提高一般的健康素养,应在地方一级提供更多与AMR相关的信息,并应加强地方对AMR缓解工作的领导。试用注册Thaiclinicaltrials.org注册:TCTR20210528003(2021年5月28日)。
    The use of antimicrobials in Thailand has been reported as one of the highest in the world in human and animal sectors. Our engagement project aimed to improve our understanding of the issue of antimicrobial use and antimicrobial resistance (AMR) among adult Thai communities, and co-create locally relevant solutions to AMR, especially those focusing on raising awareness to improve related policies in Thailand.We conducted a series of online and in-person \'conversations\' according to Wellcome\'s \'Responsive Dialogues\' engagement approach, designed to bring together different voices to understand complex AMR problems and find potential solutions. This approach enabled key AMR stakeholders and policy makers to hear directly from communities and members of the public, and vice versa. Conversations events took place between 25 November 2020 and 8 July 2022, and we engaged 179 AMR key stakeholders and members of the public across Thailand.The issues found were: there were quite a lot of misunderstandings around antimicrobials and AMR; participants felt that communications and engagement around antimicrobial resistance had limited reach and impact; asking for and taking antibiotics for self-limiting ailments is a social norm in Thailand; and there appeared to be a wide availability of cheap antimicrobials. To mitigate the spread of AMR, participants suggested that the messages around AMR should be tailored to the target audience, there should be more initiatives to increase general health literacy, there should be increased availability of AMR related information at the local level and there should be increased local leadership of AMR mitigation efforts.Trial registration Thaiclinicaltrials.org registration: TCTR20210528003 (28/05/2021).
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  • 文章类型: Journal Article
    矫正器中正畸力的质量主要受其机械性能的影响。目前,关于环境因素如何影响矫正器的机械功能的信息不足,研究表明,患者在进食和饮水时没有足够注意去除矫正器。因此,在这项研究中,我们研究了不同化学物质对热塑性材料力学性能的影响。
    在这项研究中,来自Easy-Vac垫片的175个热塑性样品(3AMedes,韩国)做好了准备,以及它们的化学成分,抗拉强度,暴露于橙汁溶液之前和之后的硬度,可乐,洗必泰漱口水,和蒸馏水被测量。单向方差分析(ANOVA),Tamhane\'stest,采用Tukey检验进行统计分析。
    片材的拉伸强度随着连续暴露于橙汁和氯己定漱口水而增加,并且它们的硬度随着连续接触碳酸饮料而降低。在暴露于不同化学品后,样品的化学组成没有变化。
    尽管这些变化具有统计学意义,它们对对准器性能的结果没有显著影响。因此,唯一的问题是橙汁和可乐在使用矫正剂和氯己定漱口水治疗期间的致癌性。
    UNASSIGNED: The quality of orthodontic forces in aligners is mainly influenced by their mechanical properties. At present, there is insufficient information on how environmental factors affect the mechanical function of aligners, and studies have shown that patients do not pay enough attention to removing aligners while eating and drinking. Therefore, in this study, we investigated the effect of different chemicals on the mechanical properties of thermoplastic materials.
    UNASSIGNED: In this study, 175 thermoplastic samples from Easy-Vac gasket (3A Medes, Korea) were prepared, and their chemical composition, tensile strength, and hardness before and after exposure to solutions of orange juice, Cola, chlorhexidine mouthwash, and distilled water were measured. One-Way analysis of variance (ANOVA), Tamhane\'s test, and Tukey\'s test were used for statistical analysis.
    UNASSIGNED: The tensile strength of the sheets increased with continuous exposure to orange juice and chlorhexidine mouthwash, and their hardness decreased with continuous exposure to carbonated beverages. There was no change in the chemical composition of the samples after exposure to different chemicals.
    UNASSIGNED: Although these changes are statistically significant, they do not have a significant effect on the result of aligner performance. Therefore, the only concern is the cariogenicity of orange juice and Cola during treatment with aligners and the administration of chlorhexidine mouthwash.
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  • 文章类型: Journal Article
    在这里,我们使用正弦运动摩擦评估系统评估了用聚丙烯酸水溶液或凝胶霜处理的人体皮肤的摩擦动力学,以证明用聚合物水溶液处理对人体皮肤的影响。将聚合物水溶液或凝胶乳膏应用于10名受试者的内臂,以评估正弦运动下摩擦力的时间变化。含水量,皮肤粘弹性,同时测量和经表皮水分流失以确定对皮肤状况的影响。当用聚合物水溶液处理人体皮肤时,处理后立即的摩擦系数为0.69-0.99,延迟时间δ,摩擦对接触探针运动的延迟响应的时间差的归一化参数除以一个往返行程的摩擦时间T0,为0.171-0.179,高于未处理的皮肤。这种增加是由聚合物水溶液中水的渗透引起的角质层的溶胀和软化引起的,这增加了皮肤和接触探针之间的真实接触面积。在用不同的聚合物水溶液处理后立即观察到皮肤的摩擦系数的显着差异。在聚合物(P1-P4)中,P4具有低耐盐性和低屈服应力,具有最低的摩擦系数,这是因为聚合物网络结构通过剪切而塌陷,并且由于人皮肤上的盐而降低了粘度。用凝胶乳膏处理的皮肤在处理后立即和90分钟后也表现出比未处理的皮肤更大的摩擦系数。这种现象可能是由凝胶乳膏中的油的闭塞效应引起的。
    Herein, we evaluated friction dynamics of human skin treated with polyacrylic acid aqueous solutions or gel creams using a sinusoidal motion friction evaluation system to demonstrate the effect of treatment with polymer aqueous solutions on human skin. A polymer aqueous solution or gel cream was applied to the inner forearms of 10 subjects to evaluate temporal changes in friction force under sinusoidal motion. Water content, skin viscoelasticity, and transepidermal water loss were also simultaneously measured to determine the effects on skin conditions. When human skin was treated with the polymer aqueous solution, the friction coefficient immediately after treatment was 0.69-0.99 and the delay time δ, a normalized parameter of the time difference in the delayed response of friction to the movement of the contact probe divided by the friction time T 0 for one round trip, was 0.171-0.179, which was greater than that of untreated skin. This increase was caused by the swelling and softening of the stratum corneum caused by the penetration of water in the polymer aqueous solution, which increased true contact area between the skin and contact probe. A significant difference was observed in the friction coefficient of the skin immediately after treatment with different polymer aqueous solutions. Among polymers (P1-P4), P4, which has a low-salt resistance and low yield stress, had the lowest friction coefficient because of collapsing of the polymer network structures by shearing and reduced viscosity owing to salts on human skin. The skin treated with a gel cream also exhibited a greater friction coefficient than the untreated skin immediately after treatment and 90 min later. This phenomenon can be caused by the occlusive effect of the oil in the gel cream.
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  • 文章类型: Journal Article
    2,3-顺式没食子酸酯型儿茶素(-)-表没食子儿茶素-3-O-没食子酸酯(EGCg)和咖啡因的水溶液提供了乳油沉淀现象,缓慢结晶约三个月,得到无色块状晶体。通过X射线晶体学分析,晶体被确定为EGCg和咖啡因的2:2复合物,其中咖啡因分子被捕获在由三个芳香族A形成的疏水空间中,B,和B\'EGCg环。认为2:2络合物在水中的溶解度迅速降低,并且2:2络合物从水溶液中沉淀。EGCg的疏水空间捕获了多种杂环化合物,并使用EGCg从水溶液中评估了杂环化合物的分子捕获能力。由于EGCg的C环有两个手性碳原子,C2和C3,EGCg的疏水空间为手性空间。EGCg捕获的环二酮哌嗪(Pro-Xxx)(Xxx=Phe,Tyr)和带有黄嘌呤骨架的药物,proxyphyline和didiprepetroline,在疏水空间中,并认识到他们的手性。
    An aqueous solution of 2,3-cis gallate type catechin (-)-epigallocatechin-3-O-gallate (EGCg) and caffeine afforded a precipitate of Creaming-down Phenomenon, which crystallized slowly for about three months to give a colorless block crystal. By X-ray crystallographic analysis, the crystal was determined to be a 2 : 2 complex of EGCg and caffeine, in which caffeine molecules were captured in a hydrophobic space formed with three aromatic A, B, and B\' rings of EGCg. It was considered that the solubility of the 2 : 2 complex in water rapidly decreased and the 2 : 2 complex precipitated from aqueous solution. The hydrophobic spaces of EGCg captured a variety of heterocyclic compounds, and the molecular capture abilities of heterocyclic compounds using EGCg from the aqueous solutions were evaluated. Since the C ring of EGCg has two chiral carbon atoms, C2 and C3, the hydrophobic space of EGCg was a chiral space. EGCg captured diketopiperazine cyclo(Pro-Xxx) (Xxx=Phe, Tyr) and pharmaceuticals with a xanthine skeleton, proxyphylline and diprophylline, in the hydrophobic space, and recognized their chirality.
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  • 文章类型: Journal Article
    目的:系统评价delNido心脏停搏液与冷血心脏停搏液在成人心脏手术中的安全性。
    方法:我们系统地搜索了PubMed,EMBase,Cochrane图书馆和ClinicalTrials.gov进行随机临床试验(于2024年1月14日发布),比较成人的delNido心脏停搏液与冷血心脏停搏液。我们的主要终点是心肌损伤标志物和临床结果。我们通过使用随机效应模型或固定效应模型评估了合并数据。
    结果:共确定了10项研究,纳入889名接受delNido心脏停搏液的患者和907名接受冷血心脏停搏液的患者。荟萃分析结果显示,与冷血停搏液相比,delNido心脏停搏液的体积较少,交叉钳夹释放后自发节律恢复率较高,术后心肌肌钙蛋白T和肌酐激酶-心肌带水平降低,所有这些都有统计学意义。然而,术后肌钙蛋白I和术后左心室射血分数差异无统计学意义。临床结果包括机械通气时间,重症监护室停留时间,住院时间,术后中风,术后新发房颤,术后心力衰竭需要主动脉内球囊泵机械循环支持,和住院死亡率两者相当。
    结论:现有证据表明,delNido心脏停搏液减少了心脏停搏液的给药体积和尝试除颤。CTnT和CK-MB的良好术后结果可能为进一步研究改善心脏停搏液的成分提供方向。
    OBJECTIVE: Systematic evaluation of the safety of del Nido cardioplegia compared to cold blood cardioplegia in adult cardiac surgery.
    METHODS: We systematically searched PubMed, EMbase, The Cochrane Library and ClinicalTrials.gov for randomized clinical trials (published by 14 January 2024) comparing del Nido cardioplegia to cold blood cardioplegia in adult. Our main endpoints were myocardial injury markers and clinical outcomes. We assessed pooled data by use of a random-effects model or a fixed-effects model.
    RESULTS: A total of 10 studies were identified, incorporating 889 patients who received del Nido cardioplegia and 907 patients who received cold blood cardioplegia. The meta-analysis results showed that compared with the cold blood cardioplegia, the del Nido cardioplegia had less volume of cardioplegia, higher rate of spontaneous rhythm recovery after cross clamp release, lower levels of postoperative cardiac troponin T and creatinine kinase-myocardial band, all of which were statistically significant. However, there was no statistically significant difference in postoperative troponin I and postoperative left ventricular ejection fraction. The clinical outcomes including mechanical ventilation time, intensive care unit stay time, hospital stay time, postoperative stroke, postoperative new-onset atrial fibrillation, postoperative heart failure requiring intra-aortic balloon pump mechanical circulation support, and in-hospital mortality of both are comparable.
    CONCLUSIONS: Existing evidence suggests that del Nido cardioplegia reduced volume of cardioplegia administration and attempts of defibrillation. The superior postoperative results in CTnT and CK-MB may provide a direction for further research on improvement of the composition of cardioplegia.
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  • 文章类型: Journal Article
    杂多糖是自然界中分布最广的化合物,充当组织构建块和营养来源。它们的物理化学和生物学特性已被彻底研究;然而,杂多糖的微观结构性质仍然知之甚少。本研究旨在探讨琼脂糖的微观结构特点,阿拉伯树胶,通过共聚焦激光扫描显微镜(CLSM)和低温扫描电子显微镜(cryo-SEM)。在这里,注意微观结构分化表面的分层复杂性,表面下,内在,和衬底界面层。多糖的微观结构的规模和模式取决于浓度,从薄片变成细胞样多孔结构。这项工作提供了对自我修复和基质诱导重组的微米级和纳米级机制的见解。因此,对自我修复机制的研究表明,这种基于扩散的过程始于纤维,变成薄片,其次是具有较小尺寸的细胞样结构。对底物诱导的重组能力的研究表明,纳米到微米(尺度)的多孔底物会导致所研究的杂多糖的界面层中的重组。这项工作有助于通过超分子观察杂多糖的结构特性,微观棱镜。
    Heteropolysaccharides are among the most widely distributed compounds in nature, acting as both tissue building blocks and as a source of nutrients. Their physicochemical and biological properties have been studied thoroughly; however, the microstructural properties of heteropolysaccharides are still poorly understood. This study aims to investigate the micro-structural peculiarities of agarose, gum arabic, hyaluronic and alginic acids by means of confocal laser scanning microscopy (CLSM) and cryogenic scanning electron microscopy (cryo-SEM). Herein, attention is paid to layered complexity of the microstructure differentiating surface, under surface, inner, and substrate interface layers. The scale and pattern of the polysaccharide\'s microstructure depend on the concentration, changing from lamellae to cell-like porous structures. This work provides the insight into micro- and nanoscale mechanisms of self-healing and substrate-induced reorganisation. Thus, investigation of the self-healing mechanism revealed that this diffusion-based process starts from the fibres, turning into lamellae, following by cell-like structures with smaller dimensions. Investigation of the substrate-induced reorganisation ability showed that nano-to-micro (scale) porous substrate causes reorganisation in the interface layer of the studied heteropolysaccharides. This work contributes to understanding the structural peculiarities of heteropolysaccharides by looking at them through a supramolecular, micro-level prism.
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  • 文章类型: Journal Article
    临床影响的证据对于释放数字健康解决方案(DHSs)的潜力至关重要。然而,许多解决方案未能提供积极的临床结果。我们认为,这种失败与当前的国土安全部评估设计方法有关,忽略了许多需要具体科学和设计考虑的关键特征(KC)。我们首先描述了DHS的KC:(1)它们是在医疗保健系统和患者级别实施的;(2)它们是“复杂”的干预措施;(3)它们可以通过许多较小的临床益处间接地驱动多种临床结果;(4)它们的作用机制可以在个体之间变化,并且根据患者的需求随时间而变化;(5)它们通过短期发展,迭代循环-在现实世界的使用环境中最佳。遵循我们的目标,以推动临床评估设计和DHS的独特特征之间的更好的一致性,然后,我们提供更好地解决这些KC的方法建议,包括作用机制映射的提示,替代随机化方法,控制臂适应,和新颖的终点选择,以及利用现实世界数据和平台研究的创新方法。
    Evidence of clinical impact is critical to unlock the potential of digital health solutions (DHSs), yet many solutions are failing to deliver positive clinical results. We argue in this viewpoint that this failure is linked to current approaches to DHS evaluation design, which neglect numerous key characteristics (KCs) requiring specific scientific and design considerations. We first delineate the KCs of DHSs: (1) they are implemented at health care system and patient levels; (2) they are \"complex\" interventions; (3) they can drive multiple clinical outcomes indirectly through a multitude of smaller clinical benefits; (4) their mechanism of action can vary between individuals and change over time based on patient needs; and (5) they develop through short, iterative cycles-optimally within a real-world use context. Following our objective to drive better alignment between clinical evaluation design and the unique traits of DHSs, we then provide methodological suggestions that better address these KCs, including tips on mechanism-of-action mapping, alternative randomization methods, control-arm adaptations, and novel end-point selection, as well as innovative methods utilizing real-world data and platform research.
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  • 文章类型: Journal Article
    森林是加拿大人的主要财富来源,纤维素构成了木纤维的“骨架”。浓H2SO4和NaOH/尿素水溶液是两种可以快速溶解纤维素的有效溶剂。我们的初步实验从这两种溶剂中获得了具有不同机械性能的再生木质纤维素膜。因此,在这里,我们旨在研究水性溶剂对木质纤维素薄膜结构和性能的影响。通过将木质纤维素溶解在64重量%H2SO4溶液(RC-H4)或NaOH/尿素水溶液(RC-N4)中来制备再生纤维素(RC)膜。RC-H4具有较高的抗拉强度(109.78±2.14MPa),更好的折叠耐久性(20-28倍),扭转角(42°)高于RC-N4(62.90±2.27MPa,不可折叠,和12°)。H2SO4溶液中的纤维素含量从3wt%增加到5wt%,导致拉伸强度从102.61±1.99提高到132.93±5.64MPa,并且不影响可折叠性。RC-H4还表现出更好的水蒸气阻隔性能(1.52±0.04×10-7g-1h-1Pa-1),优异的透明度(〜90%的透射率在800纳米),但热稳定性低于RC-N4。这项工作提供了对两种水性溶剂中再生木材纤维素的特殊见解,并有望促进从丰富的林业资源中开发高性能RC膜。
    Forests are a major source of wealth for Canadians, and cellulose makes up the \"skeleton\" of wood fibers. Concentrated H2SO4 and NaOH/urea aqueous solutions are two efficient solvents that can rapidly dissolve cellulose. Our preliminary experiment obtained regenerated wood cellulose films with different mechanical properties from these two solvents. Therefore, herein, we aim to investigate the effects of aqueous solvents on the structure and properties of wood cellulose films. Regenerated cellulose (RC) films were produced by dissolving wood cellulose in either 64 wt% H2SO4 solution (RC-H4) or NaOH/urea aqueous solution (RC-N4). RC-H4 showed the higher tensile strength (109.78 ± 2.14 MPa), better folding endurance (20-28 times), and higher torsion angle (42°) than RC-N4 (62.90 ± 2.27 MPa, un-foldable, and 12°). The increased cellulose contents in the H2SO4 solutions from 3 to 5 wt% resulted in an improved tensile strength from 102.61 ± 1.99 to 132.93 ± 5.64 MPa and did not affect the foldability. RC-H4 also exhibited better water vapor barrier property (1.52 ± 0.04 × 10-7 g m-1 h-1 Pa-1), superior transparency (~90 % transmittance at 800 nm), but lower thermal stability compared to RC-N4. This work provides special insights into the regenerated wood cellulose from two aqueous solvents and is expected to facilitate the development of high-performance RC films from abundant forestry resources.
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  • 文章类型: Journal Article
    从液态锂资源中提取Li是当前研究的重点。凹凸棒石(ATP),以其独特的层状结构和固有的离子交换特性为特征,作为制造锂离子筛的特殊材料而出现。成功合成了离子印迹壳聚糖/ATP复合材料,证明选择性吸收Li+的功效。结果强调了H-CTP-2中存在丰富的官能团,增强了其吸收性和选择性,吸附容量为37.56mg·g-1。吸附符合Langmuir和拟二级动力学模型。Li+配位涉及氨基和羟基,表明化学吸附过程。此外,ATP的大量孔结构和显著的比表面积显著促进Li+吸附,表明它不仅参与化学吸附,而且参与物理吸附。制造的离子印迹材料具有相当大的吸附能力,特殊的选择性,和快速动力学,突出了它们从水溶液中有效分离Li+的潜力。
    The extraction of Li+ from liquid lithium resources is a pivotal focus of current research endeavors. Attapulgite (ATP), characterized by its distinctive layered structure and inherent ion exchange properties, emerges as an exceptional material for fabricating lithium-ion sieve. Ion-imprinted chitosan/ATP composite materials are successfully synthesized, demonstrating efficacy in selectively absorbing Li+. The results emphasize the rich functional groups present in H-CTP-2, enhancing its absorbability and selectivity, with an adsorption capacity of 37.56 mg•g-1. The adsorption conforms to the Langmuir and pseudo-second-order kinetic model. Li+ coordination involves amino and hydroxyl group, indicating a chemisorption process. Furthermore, the substantial pore structure and significant specific surface area of ATP significantly promote Li+ adsorption, suggesting its participation not only in chemisorption but also in physical adsorption. The fabricated ion-imprinted materials boast substantial adsorption capacity, exceptional selectivity, and rapid kinetics, highlighting their potential for effectively separating Li+ from aqueous solution.
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  • 文章类型: Journal Article
    水溶液化学对离子水合结构及其相应的纳滤(NF)选择性的影响是有关离子选择性传输的研究空白。在这项研究中,采用原位液体飞行时间二次离子质谱结合分子动力学模拟,研究了两种典型一价阴离子(Cl-和NO3-)在不同水溶液化学条件下的水合分布以及NF过程中相应的跨膜选择性。我们证明了离子水合结构与孔空间效应之间的不可分割的联系,并进一步发现可以通过打破氢键网络之间的平衡来调节离子跨膜运输(即,水-水)和离子水合(即,离子-水)水合离子的相互作用。对于具有更强烈的离子-水相互作用的强水合(H2O)nCl-,更高的盐浓度和共存的离子竞争导致更大的水合尺寸,因此,NF膜对离子的排斥更高,而弱水合(H2O)nNO3-在相同条件下相反。更强的OH-阴离子水合竞争导致较小的水合尺寸的(H2O)nCl-和(H2O)nNO3-,显示在pH10.5下观察到的较低的平均水合数。这项研究加深了人们对NF分离机制的长期忽视的理解,关于水化结构。
    The effect of aqueous solution chemistry on the ionic hydration structure and its corresponding nanofiltration (NF) selectivity is a research gap concerning ion-selective transport. In this study, the hydration distribution of two typical monovalent anions (Cl- and NO3-) under different aqueous solution chemical conditions and the corresponding transmembrane selectivity during NF were investigated by using in situ liquid time-of-flight secondary ion mass spectrometry in combination with molecular dynamics simulations. We demonstrate the inextricable link between the ion hydration structure and the pore steric effect and further find that ionic transmembrane transport can be regulated by breaking the balance between the hydrogen bond network (i.e., water-water) and ion hydration (i.e., ion-water) interactions of hydrated ion. For strongly hydrated (H2O)nCl- with more intense ion-water interactions, a higher salt concentration and coexisting ion competition led to a larger hydrated size and, thus, a higher ion rejection by the NF membrane, whereas weakly hydrated (H2O)nNO3- takes the reverse under the same conditions. Stronger OH--anion hydration competition resulted in a smaller hydrated size of (H2O)nCl- and (H2O)nNO3-, showing a lower observed average hydration number at pH 10.5. This study deepens the long-overlooked understanding of NF separation mechanisms, concerning the hydration structure.
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