Redox

氧化还原
  • 文章类型: Journal Article
    我们回顾了富含硅(Si)的生物炭(sichars)作为害虫和病原体控制作物改良剂的潜力。从我们系统的文献检索中出现的主要病理系统是茄科作物的青枯病(主要是番茄,胡椒,烟草和茄子),禾本科作物(主要是水稻和小麦)上的刺吸半翅目害虫和土传真菌,和寄生在其他作物上的线虫。确定的主要害虫和病原体缓解途径是:i)基于Si的物理屏障;ii)诱导植物防御;iii)在根线虫的情况下增强植物有益/病原体拮抗土壤微生物区系;iv)改变土壤理化性质,导致不利于根线虫的Eh-pH条件;v)改变土壤理化性质,导致Eh-pH,有利于植物生长的堆积密度和/或持水能力,以及由此产生的对坏死性病原体的耐受性;vi)增加Si吸收,导致植物质量降低,由于某些半生物营养性害虫或病原体的氮摄入量减少。我们的评论强调了途径之间的协同作用和其他途径之间的权衡,视情况而定,除其他外,关于:i)作物类型(尤其是Si积累与否);ii)害虫/病原体类型(例如,地下/根部破坏与地上/地上部分破坏;\“生物营养\”与\“坏死\”sensulato,和相应的系统抗性途径;繁荣的Eh-pH谱等。);iii)土壤类型。我们的评论还强调需要进一步研究:i)Si的贡献和生物炭的其他物理化学特性(包括潜在的拮抗作用);ii)热解过程a)优化土壤中的Si有效性及其被作物吸收,b)尽量减少有害化合物的形成,例如方英石;iii)生物炭的最佳形式,例如,生物炭表面上的硅纳米颗粒,微米级生物炭基复合肥与较大的生物炭多孔基质。
    We reviewed the potential of silicon (Si)-rich biochars (sichars) as crop amendments for pest and pathogen control. The main pathosystems that emerged from our systematic literature search were bacterial wilt on solanaceous crops (mainly tomato, pepper, tobacco and eggplant), piercing-sucking hemipteran pests and soil-borne fungi on gramineous crops (mainly rice and wheat), and parasitic nematodes on other crops. The major pest and pathogen mitigation pathways identified were: i) Si-based physical barriers; ii) Induction of plant defenses; iii) Enhancement of plant-beneficial/pathogen-antagonistic soil microflora in the case of root nematodes; iv) Alteration of soil physical-chemical properties resulting in Eh-pH conditions unfavorable to root nematodes; v) Alteration of soil physical-chemical properties resulting in Eh-pH, bulk density and/or water holding capacity favorable to plant growth and resulting tolerance to necrotrophic pathogens; vi) Increased Si uptake resulting in reduced plant quality, owing to reduced nitrogen intake towards some hemi-biotrophic pests or pathogens. Our review highlighted synergies between pathways and tradeoffs between others, depending, inter alia, on: i) crop type (notably whether Si-accumulating or not); ii) pest/pathogen type (e.g. below-ground/root-damaging vs above-ground/aerial part-damaging; \"biotrophic\" vs \"necrotrophic\" sensu lato, and corresponding systemic resistance pathways; thriving Eh-pH spectrum; etc.); iii) soil type. Our review also stressed the need for further research on: i) the contribution of Si and other physical-chemical characteristics of biochars (including potential antagonistic effects); ii) the pyrolysis process to a) optimize Si availability in the soil and its uptake by the crop and b) to minimize formation of harmful compounds e.g. cristobalite; iii) on the optimal form of biochar, e.g. Si-nano particles on the surface of the biochar, micron-sized biochar-based compound fertilizer vs larger biochar porous matrices.
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  • 文章类型: Journal Article
    DW(染色废水)含有大量的染料有机化合物。在废水处理过程中产生的相当大比例的染料本身或其中间产物表现出CMR(致癌/诱变/对生殖有毒)毒性。与物理化学方法相比,生物处理在运营成本和温室气体排放方面是有利的,已成为DW治疗不可或缺的主流技术。本文综述了废水中染料有机化合物的吸附和降解机理,并分析了不同的生物过程,从传统方法到生物炭(BC)增强的工艺。对于传统的生物过程,微生物特征和群落进行了讨论,以及不同生物反应器的去除效率。BC具有吸附和氧化还原电子介导作用,与生物处理耦合可以进一步增强生物吸附和降解过程。尽管BC偶联的生物处理显示出很有希望的染料去除,还需要进一步的研究来优化处理工艺,特别是在技术和经济竞争力方面。
    DW (Dyeing wastewater) contains a large amount of dye organic compounds. A considerable proportion of dye itself or its intermediate products generated during wastewater treatment process exhibits CMR (Carcinogenic/Mutagenic/Toxic to Reproduction) toxicity. Compared with physicochemical methods, biological treatment is advantageous in terms of operating costs and greenhouse gas emissions, and has become the indispensable mainstream technology for DW treatment. This article reviews the adsorption and degradation mechanisms of dye organic compounds in wastewater and analyzed different biological processes, ranging from traditional methods to processes enhanced by biochar (BC). For traditional biological processes, microbial characteristics and communities were discussed, as well as the removal efficiency of different bioreactors. BC has adsorption and redox electron mediated effects, and coupling with biological treatment can further enhance the process of biosorption and degradation. Although BC coupled biological treatment shows promising dye removal, further research is still needed to optimize the treatment process, especially in terms of technical and economic competitiveness.
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  • 文章类型: Journal Article
    乙醇消耗通过其代谢物产生活性氧(ROS)来触发氧化应激。这个过程导致脂肪变性和肝脏炎症,这对酒精性肝病(ALD)的发展至关重要。自噬是一个受调节的动态过程,可隔离受损和过量的细胞质细胞器以进行溶酶体降解,并可能抵消ROS诱导的氧化应激的有害影响。这些影响包括肝毒性,线粒体损伤,脂肪变性,内质网应激,炎症,铁过载。在肝脏疾病中,特别是ALD,巨自噬被认为是肝细胞的保护机制,尽管它在星状细胞中似乎没有发挥相同的作用。在肝脏之外,自噬还可以减轻酒精对其他器官的有害影响,从而提供防止ALD的附加保护层。研究表明,与自噬相互作用的药物,如雷帕霉素,在动物模型中可以预防ALD的发展。这篇系统的综述对文献进行了全面的分析,关注自噬在氧化应激调节中的作用,它参与与ALD相关的器官-器官串扰,以及自噬靶向治疗策略的潜力。
    Ethanol consumption triggers oxidative stress by generating reactive oxygen species (ROS) through its metabolites. This process leads to steatosis and liver inflammation, which are critical for the development of alcoholic liver disease (ALD). Autophagy is a regulated dynamic process that sequesters damaged and excess cytoplasmic organelles for lysosomal degradation and may counteract the harmful effects of ROS-induced oxidative stress. These effects include hepatotoxicity, mitochondrial damage, steatosis, endoplasmic reticulum stress, inflammation, and iron overload. In liver diseases, particularly ALD, macroautophagy has been implicated as a protective mechanism in hepatocytes, although it does not appear to play the same role in stellate cells. Beyond the liver, autophagy may also mitigate the harmful effects of alcohol on other organs, thereby providing an additional layer of protection against ALD. This protective potential is further supported by studies showing that drugs that interact with autophagy, such as rapamycin, can prevent ALD development in animal models. This systematic review presents a comprehensive analysis of the literature, focusing on the role of autophagy in oxidative stress regulation, its involvement in organ-organ crosstalk relevant to ALD, and the potential of autophagy-targeting therapeutic strategies.
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  • 文章类型: Journal Article
    由于2019年SARS-CoV-2疫情,低成本,快,使用多个工作电极的实际样品中用于生物传感SARS-CoV-2的用户友好的诊断试剂盒的需求很高。选择SARS-CoV-2检测电极是困难的,因为每个都有优点和局限性。基于碳的电化学传感应用已经引起电化学传感界的关注,因为碳和基于碳的材料已经成为利用电化学平台进行测试的天赐之物。碳工作电极电化学平台具有成本效益且快速。Covid传感器使用碳基材料,因为它们很容易改变(具有无机和有机功能),具有快速反应动力学,并且具有化学抗性。Covid-19传感材料包括石墨烯和石墨。这篇综述解释了碳材料如何用于N和S蛋白质电化学检测。这里,我们讨论了基于碳的SARS-CoV-2生物传感技术。我们已经将碳基电化学传感与不同电极进行了比较。
    Due to the 2019 SARS-CoV-2 outbreak, low-cost, fast, and user-friendly diagnostic kits for biosensing SARS-CoV-2 in real samples employing multiple working electrodes are in high demand. Choosing SARS-CoV-2 detecting electrodes is difficult because each has advantages and limitations. Carbon-based electrochemical sensing applications have attracted attention from the electrochemical sensing community because carbon and carbon-based materials have been a godsend for testing utilizing an electrochemical platform. Carbon working electrode electrochemical platforms are cost-effective and fast. Covid-sensors use carbon-based materials because they can be easily changed (with inorganic and organic functionalities), have quick response kinetics, and are chemically resistant. Covid-19 sensing materials include graphene and graphite. This review explains how carbon materials have been employed in N and S protein electrochemical detection. Here, we discussed a carbon-based technology for SARS-CoV-2 biosensing. We\'ve compared carbon-based electrochemical sensing to different electrodes.
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  • 文章类型: Journal Article
    红细胞(RBC)的流变特性在其微循环中起着重要作用。RBC可以响应于机械力弹性变形以穿过狭窄的血管以在外周组织中进行有效的气体交换。在与生活方式相关的疾病如糖尿病中观察到红细胞变形性降低,高胆固醇血症,和高血压,这是与氧化应激增加和一氧化氮(NO)生物利用度降低有关的病理状况。红细胞细胞骨架蛋白上的氧化还原敏感半胱氨酸残基,如α-和β-血色素,负责膜的灵活性,受到长期氧化应激的影响,导致可逆和不可逆的氧化修饰和降低的红细胞变形性。然而,内源性,外源产生的NO通过用谷胱甘肽帽屏蔽氧化还原敏感的半胱氨酸残基来保护RBC膜的柔韧性免受进一步的氧化修饰。最近的研究表明,富含硝酸盐的饮食和适度的运动可以通过增加红细胞和血管内皮介导的微循环NO生物利用度之间的相互作用来增强NO的产生,从而增加RBC的可变形性。本文综述了RBC-和非RBC-介导NO产生的分子机制,以及饮食和运动来源的NO如何在与血管内皮功能障碍有关的生活方式相关疾病中预防红细胞变形能力降低。
    The rheological properties of red blood cells (RBCs) play an important role in their microcirculation. RBCs can elastically deform in response to mechanical forces to pass through narrow vessels for effective gas exchange in peripheral tissues. Decreased RBC deformability is observed in lifestyle-related diseases such as diabetes mellitus, hypercholesterolemia, and hypertension, which are pathological conditions linked to increased oxidative stress and decreased nitric oxide (NO) bioavailability. Redox-sensitive cysteine residues on RBC cytoskeletal proteins, such as α- and β-spectrins, responsible for membrane flexibility, are affected by prolonged oxidative stress, leading to reversible and irreversible oxidative modifications and decreased RBC deformability. However, endogenously, and exogenously generated NO protects RBC membrane flexibility from further oxidative modification by shielding redox-sensitive cysteine residues with a glutathione cap. Recent studies have shown that nitrate-rich diets and moderate exercise can enhance NO production to increase RBC deformability by increasing the interplay between RBCs and vascular endothelium-mediated NO bioavailability for microcirculation. This review focuses on the molecular mechanism of RBC- and non-RBC-mediated NO generation, and how diet- and exercise-derived NO exert prophylactic effects against decreased RBC deformability in lifestyle-related diseases with vascular endothelial dysfunction.
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  • 文章类型: Journal Article
    体育锻炼是提高个体抗氧化能力的常用方法之一。然而,不适当的体育锻炼计划会导致额外的氧化应激(OS),体育锻炼方案的细节与细胞内OS严重程度之间的关系尚不清楚。通过搜索PubMed,Medline,和WebofScience的资格标准:(1)18岁以上的参与者;(2)体育锻炼干预措施;(3)8-羟基脱氧鸟苷,F2-异前列腺素,和蛋白质羰基(PC)作为结果指标;(4)以英文发表并经过同行评审。包括12项研究,并将其中8个的数据汇总在一起。作者之间的协议kappa值为0.73。荟萃分析结果表明:(1)有氧运动的OS水平不取决于体育锻炼的绝对强度,而取决于运动的强度和运动量;(2)高强度有氧运动(HIAE)以及HIAE和阻力训练的联合方案在不健康人群中诱发大OS的可能性最高;(3)中等强度到高强度有氧运动诱发的OS明显大于中等强度的成年人和低强度的成年人的细胞内运动诱发概率。活动在人体各种组织中诱导OS,OS的严重程度取决于体育锻炼的许多因素以及个人的健康状况。高强度和高容量的体育锻炼程序具有最大的诱发严重操作系统的可能性,而中等强度的有氧运动计划和相对较小的高强度间歇训练计划可能对不健康个体的氧化还原平衡有益。总之,建议在中等强度或高强度间歇训练下进行持续有氧运动,以增强身体维持氧化还原平衡的能力,特别是不健康的人。PROSPERO注册号为CRD42022349687。
    A physical exercise program is one of the commonly used methods for improving an individual\'s antioxidative capacity. However, an inappropriate physical exercise program would induce extra oxidative stress (OS), and the relationship between the details of a physical exercise protocol and the severity of intracellular OS is still unclear. A systematic review and meta-analysis of randomized controlled trials were conducted by searching PubMed, Medline, and Web of Science with the eligibility criteria: (1) participants over 18 years old; (2) physical exercise interventions; (3) 8-hydroxydeoxyguanosine, F2-isoprostanes, and protein carbonyls (PCs) as outcome measures; (4) published in English and peer-reviewed. 12 studies were included, and the data of 8 in them were pooled together. The agreement between authors reached a kappa value of 0.73. The results of the meta-analysis showed that: (1) the level of OS did not depend on the absolute intensity of physical exercise but on both the intensity and the volume of exercise; (2) high-intensity aerobic exercise (HIAE) and a combined protocol of HIAE and resistance training had the highest potential to induce large OS in unhealthy people; (3) the OS induced by moderate-to-high intensity aerobic exercise was significantly larger than that induced by ordinary life activities in healthy adults; (4) high-intensity interval training and moderate-intensity aerobic exercise had the lowest and sub-lowest probabilities to induce high intracellular OS for unhealthy adults. activities induce OS in various tissues in the human body, and the severity of OS depends on many factors of physical exercises as well as the health condition of an individual. A high-intensity and high-volume physical exercise program has the largest possibility of inducing severe OS, while a moderate-intensity aerobic exercise program and a high-intensity interval training program with a relatively low volume might be beneficial to the redox balance for unhealthy individuals. In conclusion, continuous aerobic exercise under moderate-intensity or high-intensity interval training could be recommended to enhance the body\'s capacity for maintaining redox balance, especially for unhealthy individuals. The PROSPERO Registration Number is CRD42022349687.
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  • 文章类型: Journal Article
    人类的强大发展离不开正确使用毒品,药物的电分析研究在分析化学领域占有重要地位。本文主要阐述了2011-2021年近十年来基于各种电极上直接电化学氧化还原的药物电分析研究进展。起初,总结了文献中一些经常使用的电化学数据处理和电化学机理研究的推导方法。然后,根据药物治疗和应用/使用目的,对药物电化学分析的研究进展进行了分类和讨论,这里我们重点介绍药物的电化学反应机理。同时,列出了最近研究的药物在各种电极上的电化学传感性能的比较,以便读者可以更直观地比较和了解每个修饰电极对每种药物的电分析传感性能。最后,本文综述了基于直接电化学氧化还原的药物电分析研究的不足和展望。
    The strong development of mankind is inseparable from the proper use of drugs, and the electroanalytical research of drugs occupies an important position in the field of analytical chemistry. This review mainly elaborates the research progress of drugs electroanalysis based on direct electrochemical redox on various electrodes for the recent decade from 2011 to 2021. At first, we summarize some frequently used electrochemical data processing and electrochemical mechanism research derivation methods in the literature. Then, according to the drug therapeutic and application/usage purposes, the research progress of drugs electrochemical analysis is classified and discussed, where we focus on drugs electrochemical reaction mechanism. At the same time, the comparisons of electrochemical sensing performance of the drugs on various electrodes from recent studies are listed, so that readers can more intuitively compare and understand the electroanalytical sensing performance of each modified electrode for each of the drug. Finally, this review discusses the shortcomings and prospects of the drugs electroanalysis based on direct electrochemical redox research.
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  • 文章类型: Journal Article
    冷冻保存比其他异地保存方法有几个优点,确实是大多数植物物种长期保护的唯一可行的储存方法。然而,尽管在这一领域取得了许多进展,越来越清楚的是,一些物种没有能力克服冷冻保存过程带来的巨大压力,使用传统的试错方法,使得协议开发变得非常困难。冷冻技术方法最近被认为是一种战略前进的方式,利用对生物系统的深入了解,为开发更有效的冷冻保存方案提供信息。线粒体功能是冷冻生物技术方法的候选模型,因为它不仅支撑着能源供应,还有其他几个决定种质结果的关键因素,包括应激反应,还原-氧化状态,和程序性细胞死亡。在动物细胞和组织冷冻保存方面的广泛研究已经在线粒体健康和冷冻保存存活之间建立了明确的联系,但也表明线粒体通常会受到冷冻保存过程多个方面的损害。已经有证据表明,线粒体功能障碍也可能发生在植物冷冻保存中,这项研究可以通过使用创新技术的考虑应用来大大扩展。已经存在一系列针对线粒体的预防和治疗干预措施,有可能通过线粒体功能改善冷冻保存结果。
    Cryopreservation has several advantages over other ex situ conservation methods, and indeed is the only viable storage method for the long term conservation of most plant species. However, despite many advances in this field, it is increasingly clear that some species are ill-equipped to overcome the intense stress imposed by the cryopreservation process, making protocol development incredibly difficult using traditional trial and error methods. Cryobiotechnology approaches have been recently recognised as a strategic way forward, utilising intimate understanding of biological systems to inform development of more effective cryopreservation protocols. Mitochondrial function is a model candidate for a cryobiotechnological approach, as it underpins not only energy provision, but also several other key determinants of germplasm outcome, including stress response, reduction-oxidation status, and programmed cell death. Extensive research in animal cell and tissue cryopreservation has established a clear link between mitochondrial health and cryopreservation survival, but also indicates that mitochondria are routinely subject to damage from multiple aspects of the cryopreservation process. Evidence is already emerging that mitochondrial dysfunction may also occur in plant cryopreservation, and this research can be greatly expanded by using considered applications of innovative technologies. A range of mitochondria-targeted prophylactic and therapeutic interventions already exist with potential to improve cryopreservation outcomes through mitochondrial function.
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    文章类型: Journal Article
    The organism\'s energy requirements for homeostatic balance are covered by the redox mechanisms. Yet in case of psychologically traumatic stress, allostatic regulations activate both pro-oxidant and antioxidant molecules as well as respective components of the inflammatory system. Thus a new setpoint of dynamic interactions among redox elements is reached. Similarly, a multifaceted interplay between redox and inflammatory fields is activated with the mediation of major effector systems such as the immune system, Hypothalamic-Pituitary-Adrenal axis, kynurenine, and the glycaemic regulatory one. In case of sustained and/or intense traumatic stress the prophylactic antioxidant components are inadequate to provide the organism with neuroprotection finally culminating in Oxidative Stress and subsequently to cellular apoptosis. In parallel multiple inflammatory systems trigger and/or are triggered by the redox systems in tight fashion so that the causation sequence appears obscure. This exhaustive review aims at the comprehension of the interaction among components of the redox system as well as to the collection of disperse findings relative to the redox-inflammatory interplay in the context of traumatic stress so that new research strategies could be developed.
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  • 文章类型: Journal Article
    锰(Mn)是一种生物重要且具有氧化还原活性的金属,可能对陆地生态系统中的碳(C)循环产生较差的控制作用。锰通过介导包括光合作用在内的生化途径影响生态系统C动力学,作为有机分子分解的反应中间体,以及通过有机-矿物缔合结合和/或氧化有机分子。然而,锰影响生态系统碳储存的潜力仍未解决。尽管大量研究已经证明了铁和铝氧化物稳定有机物的能力,缺乏关于锰氧化物的类似信息。此外,锰介导的反应调节重要的凋落物分解途径,但是这些过程在不同的生态系统中受到限制。这里,我们讨论了锰在陆地环境中的生态作用,并综合了关于生物地球化学锰和碳循环相交的多种途径的现有知识。我们证明,Mn具有通过非生物和微生物介导的氧化降解有机分子和稳定有机分子的高潜力,至少暂时的,通过有机矿物协会。我们概述了推进对Mn-C相互作用的理解所需的研究重点,强调可能解决土壤C预测中关键不确定性的知识差距。
    Manganese (Mn) is a biologically important and redox-active metal that may exert a poorly recognized control on carbon (C) cycling in terrestrial ecosystems. Manganese influences ecosystem C dynamics by mediating biochemical pathways that include photosynthesis, serving as a reactive intermediate in the breakdown of organic molecules, and binding and/or oxidizing organic molecules through organo-mineral associations. However, the potential for Mn to influence ecosystem C storage remains unresolved. Although substantial research has demonstrated the ability of Fe- and Al-oxides to stabilize organic matter, there is a scarcity of similar information regarding Mn-oxides. Furthermore, Mn-mediated reactions regulate important litter decomposition pathways, but these processes are poorly constrained across diverse ecosystems. Here, we discuss the ecological roles of Mn in terrestrial environments and synthesize existing knowledge on the multiple pathways by which biogeochemical Mn and C cycling intersect. We demonstrate that Mn has a high potential to degrade organic molecules through abiotic and microbially mediated oxidation and to stabilize organic molecules, at least temporarily, through organo-mineral associations. We outline research priorities needed to advance understanding of Mn-C interactions, highlighting knowledge gaps that may address key uncertainties in soil C predictions.
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