bioavailability

生物利用度
  • 文章类型: Journal Article
    This review examines the correlation between plant-based diets and athletic performance, with a specific emphasis on the vital aspect of optimizing micronutrients for athletes. In light of the increasing prevalence of plant-based nutrition among athletes due to its perceived advantages in terms of health, ethics, and the environment, this study investigates the ability of these diets to satisfy the demanding nutritional requirements essential for achieving optimal performance and facilitating recovery. The article emphasizes the significance of essential micronutrients such as iron, vitamin B12, calcium, vitamin D, zinc, and omega-3 fatty acids and also addressing the challenges with their absorption and bioavailability from plant sources. The review consolidates existing scientific knowledge to propose strategies for improving micronutrient consumption, comparing the effects of supplements against whole foods, and highlighting the significance of enhancing bioavailability. The proposal supports the implementation of personalized meal planning, with the assistance of sports nutritionists or dietitians, and is substantiated by case studies showcasing the success of plant-based athletes. Future research directions examine the long-term effects of plant-based diets on micronutrient status and athletic performance, as well as developing nutritional trends and technology. The review concludes that plant-based diets can meet athletes\' nutritional demands and improve peak performance while aligning with personal and ethical values with strategic planning and professional guidance. This study intends to help athletes, coaches, and nutritionists understand plant-based nutrition for enhanced athletic performance.
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  • 文章类型: Journal Article
    Flavonoids are found in the roots, stems, leaves, and fruits of many plant taxa. They are related to plant growth and development, pigment formation, and protection against environmental stress. Flavonoids function as antioxidants and exert anti-inflammatory effects in the cardiovascular system by modulating classical inflammatory response pathways, such as the TLR4-NF-ĸB, PI3K-AKT, and Nrf2/HO-1 signalling pathways. There is increasing evidence for the therapeutic effects of flavonoids on hypertension, atherosclerosis, and other diseases. The potential clinical value of flavonoids for diseases of the cardiovascular system has been widely explored. For example, studies have evaluated the roles of flavonoids in the regulation of blood pressure via endothelium-dependent and non-endothelium-dependent pathways and in the regulation of myocardial systolic and diastolic functions by influencing calcium homeostasis and smooth muscle-related protein expression. Flavonoids also have hypoglycaemic, hypolipidemic, anti-platelet, autophagy, and antibacterial effects. In this paper, the role and mechanism of flavonoids in cardiovascular diseases were reviewed in order to provide reference for the clinical application of flavonoids in the future.
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  • 文章类型: Journal Article
    Neonicotinoid pesticides (NNPs) and microplastics (MPs) are two emerging contaminants in agricultural environment. However, the interaction between MPs (especially biodegradable plastics) and NNPs is currently unclear. Therefore, taking thiacloprid (THI) as an example of NNPs, this study explores the adsorption-desorption process and mechanism of NNPs on MPs (traditional and biodegradable plastics), and analyzed the main factors affecting the adsorption (pH, salinity and dissolved organic matter). In addition, by using diffusive gradients in thin-films device, this study assessed the impact of MPs on the bioavailability of NNPs in soil. The results showed that the maximum adsorption capacity of polyamide 6 (96.49 μg g-1) for THI was greater than that of poly (butylene adipate co-terephthalate) (88.78 μg g-1). Aging increased the adsorption amount of THI (5.53 %-15.8 %) due to the higher specific surface area and reduced contact angle of MPs, but the adsorption mechanism remained unchanged. The desorption amount of THI from MPs in simulated intestinal fluid is 1.30-1.36 times. The MPs in soil alter the distribution of THI in the soil, increasing the bioavailability of THI while inhibiting its degradation. The results highlighted the significance of examining the combined pollution caused by MPs and NNPs.
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  • 文章类型: Journal Article
    纳米生物技术是农业生产和土壤修复的潜在安全和可持续战略,然而,纳米材料(NMs)应用于修复重金属(类)污染土壤的潜力仍不清楚。进行了大约6000个观察值的荟萃分析,以量化NMs对重金属(loid)(HM)污染的土壤中安全作物生产的影响。并使用机器学习方法来识别主要的贡献特征。施用NMs可以提高作物的枝条(18.2%,15.4-21.2%)和粮食生物量(30.7%,26.9-34.9%),并将芽和谷物HM浓度降低31.8%(28.9-34.5%)和46.8%(43.7-49.8%),分别。与其他类型的NMs相比,铁-NMs显示出更大的抑制作物HM吸收的潜力。我们的结果进一步证明,通过人类健康风险评估,NMs的应用大大降低了作物籽粒中HM的潜在健康风险。NMs诱导的HM积累减少与HM生物利用度降低有关,以及增加土壤pH值和有机质。随机森林模型表明,土壤pH和总HM浓度是影响枝条HM积累的两个重要特征。对文献的分析强调了NMs应用在促进受HM污染的农田中的安全农业生产方面的巨大潜力。
    Nanobiotechnology is a potentially safe and sustainable strategy for both agricultural production and soil remediation, yet the potential of nanomaterials (NMs) application to remediate heavy metal(loid)-contaminated soils is still unclear. A meta-analysis with approximately 6000 observations was conducted to quantify the effects of NMs on safe crop production in soils contaminated with heavy metal(loid) (HM), and a machine learning approach was used to identify the major contributing features. Applying NMs can elevate the crop shoot (18.2 %, 15.4-21.2 %) and grain biomass (30.7 %, 26.9-34.9 %), and decrease the shoot and grain HM concentration by 31.8 % (28.9-34.5 %) and 46.8 % (43.7-49.8 %), respectively. Iron-NMs showed a greater potential to inhibit crop HM uptake compared to other types of NMs. Our result further demonstrates that NMs application substantially reduces the potential health risk of HM in crop grains by human health risk assessment. The NMs-induced reduction in HM accumulation was associated with decreasing HM bioavailability, as well as increased soil pH and organic matter. A random forest model demonstrates that soil pH and total HM concentration are the two significant features affecting shoot HM accumulation. This analysis of the literature highlights the significant potential of NMs application in promoting safe agricultural production in HM-contaminated agricultural lands.
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  • 文章类型: Journal Article
    金属(类)(ME)和微塑料(MP)对陆地环境的综合污染是一个主要的环境问题。一旦国会议员进入土壤,他们可以与ME互动并修改其环境可用性,环境生物利用度,以及对生物群的潜在毒性影响。尽管已经做出了研究努力来描述驱动MP和ME相互作用的潜在机制,尚未记录MPs对陆地软体动物ME生物利用度的影响.为了填补这个空白,我们将陆生蜗牛Cantareusaspersus暴露于聚苯乙烯(PS)和砷(As)的不同组合,镉(Cd),或汞(Hg)浓度。使用动力学方法,然后,我们评估了As的环境可用性的变化,平衡三周后的Cd或Hg以及As的环境生物利用度,暴露四周后,蜗牛体内的Cd或Hg。我们表明,虽然环境可用性受到总ME浓度的影响,PS的作用有限。尽管在实验开始时观察到最高暴露浓度的As可用性增加,无论PS颗粒浓度如何,土壤老化过程都会导致土壤中的快速吸附。关于转移给蜗牛,ME的生物积累与ME的浓度有关,但不受土壤中PS浓度的影响。然而,动力学方法证明了As(2至2.6倍)和Cd(1.6倍)的增加,但不是汞,环境生物利用度或排泄(As的2.3至3.6倍,在低PS浓度下,Cd)为1.8倍。然而,由于蜗牛消化道中MEs的生物可及性增加,因此在最高PS暴露浓度下不再观察到这些影响。这种封闭反应的概括和所涉及的精确机制的识别需要进一步的研究,以加深我们对在共同发生的情况下ME的MP介导的行为的理解。
    The combined contamination of terrestrial environments by metal(loid)s (MEs) and microplastics (MPs) is a major environmental issue. Once MPs enter soils, they can interact with MEs and modify their environmental availability, environmental bioavailability, and potential toxic effects on biota. Although research efforts have been made to describe the underlying mechanisms driving MP and ME interactions, the effects of MPs on ME bioavailability in terrestrial Mollusca have not yet been documented. To fill this gap, we exposed the terrestrial snail Cantareus aspersus to different combinations of polystyrene (PS) and arsenic (As), cadmium (Cd), or mercury (Hg) concentrations. Using kinetic approaches, we then assessed the variations in the environmental availability of As, Cd or Hg after three weeks of equilibration and in the environmental bioavailability of As, Cd or Hg to snails after four weeks of exposure. We showed that while environmental availability was influenced by the total ME concentration, the effects of PS were limited. Although an increase in As availability was observed for the highest exposure concentrations at the beginning of the experiment, the soil ageing processes led to rapid adsorption in the soil regardless of the PS particle concentration. Concerning transfers to snail, ME bioaccumulation was ME concentration-dependent but not modified by the PS concentration in the soils. Nevertheless, the kinetic approaches evidenced an increase in As (2- to 2.6-fold) and Cd (1.6-fold), but not Hg, environmental bioavailability or excretion (2.3- to 3.6-fold for As, 1.8-fold for Cd) at low PS concentrations. However, these impacts were no longer observable at the highest PS exposure concentrations because of the increase in the bioaccessibility of MEs in the snail digestive tract. The generalization of such hormetic responses and the identification of the precise mechanisms involved necessitate further research to deepen our understanding of the MP-mediated behaviour of MEs in co-occurring scenarios.
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  • 文章类型: Journal Article
    增强重金属污染的修复效果,在镉污染土壤中添加不同成熟度的有机肥。通过评价镉在重金属污染土壤中的形态转化和生物有效性来确定修复效果。-结果表明,当成熟度为50%时,尽管土壤腐殖质(HS)含量增加,并没有降低土壤Cd的生物有效性。适当提高成熟度(GI≥80%),HS增加了113.95%~157.96%,显著降低了土壤Cd的生物有效性,其中可交换Cd下降了16.04%~33.51%(P<0.01)。结构方程模型(SEM)表明,HS含量是影响Cd形态转化和可交换Cd积累减少的关键因素;HS和残留Cd含量与成熟度呈正相关(P<0.01)。交换态Cd含量与成熟度呈负相关(P<0.01),并且相关性随着成熟度的增加而增加。总之,适当增加成熟度(GI≥80%)可以显著增加HS,促进可交换Cd转化为残留Cd,最终提高有机肥对土壤Cd污染的修复效果。这些结果为通过有机肥作为Cd污染土壤的土壤改良剂修复Cd污染土壤提供了新的见解。
    To enhance the remediation effect of heavy metal pollution, organic fertilizers with different maturity levels were added to cadmium-contaminated soil. The remediation effect was determined by evaluating the form transformation and bioavailability of cadmium in heavy metal-contaminated soil. -Results showed that when the maturity was 50%, although the soil humus (HS) content increased, it didn\'t contribute to reducing the bioavailability of soil Cd. Appropriately increasing the maturity (GI ≥ 80%), the HS increased by 113.95%∼157.96%, and reduced significantly the bioavailability of soil Cd, among the exchangeable Cd decreased by 16.04%∼33.51% (P < 0.01). The structural equation modeling (SEM) revealed that HS content is a critical factor influencing the transformation of Cd forms and the reduction of exchangeable Cd accumulation; the HS and residual Cd content were positively correlated with the maturity (P < 0.01), while exchangeable Cd content was negatively correlated with maturity (P < 0.01), and the correlation increased with increasing maturity. In summary, appropriately increasing the maturity (GI ≥ 80%) can increase significantly HS, promote the transformation of exchangeable Cd into residual Cd, and ultimately enhance the effectiveness of organic fertilizers in the remediation of soil Cd pollution. These results provide a new insight into the remediation of Cd-contaminated soil through organic fertilizer as soil amendment in Cd-contaminated soil.
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  • 文章类型: Journal Article
    肽在生物材料中广泛用于改善细胞粘附,掺入生物活性配体,并实现细胞介导的基质降解。虽然掺入生物材料中的许多肽旨在存在于材料的整个生命周期中,它们的稳定性通常在培养过程中不被量化。在这项工作中,我们设计了一系列包含四种不同的N端肽官能化和三种C端官能化的肽文库,以更好地了解如何使用简单的修饰来减少肽的非特异性降解.我们用生物材料研究中常用的三种细胞类型测试了这些文库,包括间充质干细胞/基质细胞(hMSCs),内皮细胞,和巨噬细胞,并量化这些细胞类型如何非特异性降解肽作为末端氨基酸和化学的功能。我们发现,含有N末端胺的溶液中的肽在48小时内几乎完全降解,不考虑末端氨基酸,甚至在高肽浓度下也会发生降解。当与细胞培养时,具有C-末端羧酸的肽也具有显著降解。我们发现,当将可溶性肽添加到在组织培养塑料或水凝胶基质中培养的细胞中时,对末端的简单修饰可以显着减少或完全消除非特异性降解。并且模拟肽与水凝胶基质缀合的功能化显着减缓了非特异性降解。我们还发现,细胞供体之间的肽降解差异最小,并且模拟通常用于功能化生物材料的不同肽的序列都具有显着的非特异性降解。最后,我们发现RGD稳定性和hMSC在水凝胶中的扩散之间存在积极的趋势,这表明改善生物材料基质中肽的稳定性可以改善工程基质的性能。
    Peptides are widely used within biomaterials to improve cell adhesion, incorporate bioactive ligands, and enable cell-mediated degradation of the matrix. While many of the peptides incorporated into biomaterials are intended to be present throughout the life of the material, their stability is not typically quantified during culture. In this work, we designed a series of peptide libraries containing four different N-terminal peptide functionalizations and three C-terminal functionalizations to better understand how simple modifications can be used to reduce the nonspecific degradation of peptides. We tested these libraries with three cell types commonly used in biomaterials research, including mesenchymal stem/stromal cells (hMSCs), endothelial cells, and macrophages, and quantified how these cell types nonspecifically degraded peptides as a function of terminal amino acid and chemistry. We found that peptides in solution which contained N-terminal amines were almost entirely degraded by 48 h, irrespective of the terminal amino acid, and that degradation occurred even at high peptide concentrations. Peptides with C-terminal carboxylic acids also had significant degradation when cultured with the cells. We found that simple modifications to the termini could significantly reduce or completely abolish nonspecific degradation when soluble peptides were added to cells cultured on tissue culture plastic or within hydrogel matrices, and that functionalizations which mimicked peptide conjugations to hydrogel matrices significantly slowed nonspecific degradation. We also found that there were minimal differences in peptide degradation across cell donors and that sequences mimicking different peptides commonly used to functionalize biomaterials all had significant nonspecific degradation. Finally, we saw that there was a positive trend between RGD stability and hMSC spreading within hydrogels, indicating that improving the stability of peptides within biomaterial matrices may improve the performance of engineered matrices.
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  • 文章类型: Journal Article
    关于多酚对人体健康有益作用的大多数研究都集中在使用水性有机溶剂提取的多酚上,忽略了一部分多酚与多糖形成复合物的事实。多糖和多酚是相互关联的,它们的相互作用会影响物理化学性质,质量,和食物的营养价值。在这次审查中,总结了主要食物来源中结合多酚的分布。详细讨论了食品加工对多酚与细胞壁多糖(CWP)之间相互作用的影响。我们还专注于消化,吸收,多糖-多酚复合物的代谢行为。不同的食品加工技术通过改变CWP和多酚的结构来影响它们之间的相互作用,溶解度,和互动的力量。相互作用会影响食物中多酚的游离浓度和可提取性,并调节其在胃肠道中的生物可及性,导致它们在结肠中的主要释放。肠道微生物对多酚的代谢显著提高了多酚的生物利用度。多酚的代谢途径和产物生成速率以及多糖的发酵特性受到相互作用的影响。此外,相互作用对稳定性具有协同或拮抗作用,溶解度,多酚的抗氧化和功能活性。总之,了解多糖和多酚之间的相互作用及其在食品加工中的变化,对于全面了解多酚的健康益处和优化食品加工技术具有重要意义。
    Most studies on the beneficial effects of polyphenols on human health have focused on polyphenols extracted using aqueous organic solvents, ignoring the fact that a portion of polyphenols form complexes with polysaccharides. Polysaccharides and polyphenols are interrelated, and their interactions affect the physicochemical property, quality, and nutritional value of foods. In this review, the distribution of bound polyphenols in major food sources is summarized. The effect of food processing on the interaction between polyphenols and cell wall polysaccharides (CWP) is discussed in detail. We also focus on the digestion, absorption, and metabolic behavior of polysaccharide-polyphenol complexes. Different food processing techniques affect the interaction between CWP and polyphenols by altering their structure, solubility, and strength of interactions. The interaction influences the free concentration and extractability of polyphenols in food and modulates their bioaccessibility in the gastrointestinal tract, leading to their major release in the colon. Metabolism of polyphenols by gut microbes significantly enhances the bioavailability of polyphenols. The metabolic pathway and product formation rate of polyphenols and the fermentation characteristics of polysaccharides are affected by the interaction. Furthermore, the interaction exhibits synergistic or antagonistic effects on the stability, solubility, antioxidant and functional activities of polyphenols. In summary, understanding the interactions between polysaccharides and polyphenols and their changes in food processing is of great significance for a comprehensive understanding of the health benefits of polyphenols and the optimization of food processing technology.
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  • 文章类型: Journal Article
    地球地壳中潜在有毒元素(PTE)在土壤中的生物利用度,例如,As,Hg,Tl,还有Pb,由于人类活动可能会造成潜在的环境和健康风险,特别是与采矿开采有关。生物监测可以通过在树木等生物体中进行测量来检测PTE污染。然而,选择要分析的植物种类和组织是与PTE吸收和易位有关的评估的关键点。这项工作的目的是评估As,Hg,Tl,板栗和铅的分布。植物组织,鉴于其对生物质和粮食生产的重要性。该研究确定了AlpiApuane(意大利)的两个地点,在相似的环境条件下(例如,高程,暴露,森林类型,和树种),但土壤PTE水平不同。表土的特征是,并测定不同生物利用度的PTE组分。还分析了板栗植物组织中的PTE浓度(叶子,吠叫,木头,坚果,和贝壳)通过确定微量和大量营养素浓度以及叶片C和N同位素组成(δ13C或δ15N),与植物健康状况同时进行评估。栗树表现出良好的健康状况,突出了其对Tl的适用性,As,Hg,和铅生物监测,通过组织特异性PTE分配。在所有植物组织中检测到相似浓度的铊和汞,正如在树叶中发现的那样,木头,和坚果,而铅只在树皮中。δ15N与叶片Mn和Tl浓度呈负相关,表明由于高污染水平和酸性土壤pH值,氮源和/或植物代谢可能发生变化。LaCulla站点树木的Tl与它在碳酸盐岩中的存在有关,而不是在表土中,强调栗子在为地球化学测量提供有价值信息方面的潜力。
    Bioavailability of potentially toxic elements (PTEs) from the Earth\'s crust in the soil, e.g., As, Hg, Tl, and Pb, can pose a potential environmental and health risk because of human activities, especially related to mining extraction. The biomonitoring allows to detect PTE contamination through their measurement in living organisms as trees. However, the choice of which plant species and tissue to analyse is a key point to be evaluated in relation to PTE absorption and translocation. The aim of this work was to assess the As, Hg, Tl, and Pb distribution in Castanea sativa Mill. plant tissues, given its importance for both biomass and food production. The study identified two sites in the Alpi Apuane (Italy), with similar environmental conditions (e.g., elevation, exposure, forest type, and tree species) but different soil PTE levels. The topsoil was characterized, and the PTE fractions with different bioavailability were measured. The PTE concentrations were also analysed in chestnut plant tissues (leaves, bark, wood, nuts, and shells) in parallel with and evaluation of plant health status through the determination of micro and macronutrient concentrations and the leaf C and N isotope composition (δ13C or δ15N). Chestnut trees showed a good health status highlighting its suitability for Tl, As, Hg, and Pb biomonitoring, by a tissue-specific PTE allocation. Thallium and Hg were detected in all plant tissues at similar concentrations, As was found in leaves, wood, and nuts while Pb only in the bark. The δ15N negatively correlated with leaf Mn and Tl concentrations, suggesting possible changes in N source and/or plant metabolism due to the high contamination level and acid soil pH. The Tl in La Culla site trees was associated with its presence in the carbonate rocks but not in the topsoil, highlighting the potentiality of chestnut in providing valuable information for geochemical surveying.
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  • 文章类型: Journal Article
    五种不同的小米(狐尾,小,谷仓,kodo和browntop)有和没有发芽都会剥落。植酸和酚类含量趋于显著降低,而小米片的抗氧化活性增加高达77.32%。在小米薄片中观察到峰值和最终粘度的显着降低。未发芽的小米主要是A型衍射图,而片状的小米则显示V型结晶度。在由发芽的小米制成的薄片中,蛋白质的消化率显着提高了37.77%。小米剥落后的矿物质生物利用度增加,特别是Ca(少量为88.22%),铁(谷仓占43.04%)和锌(科多占61.77%),这归因于植酸的减少。剥落,然而,导致快速和缓慢消化的淀粉增加,抗性淀粉相应减少。在未发芽和发芽的小米薄片中,Foxtail在整体可接受性方面获得了最高的感官评分。
    Five different millets (foxtail, little, barnyard, kodo and browntop) with and without sprouting were subjected to flaking. Phytic acid and phenolic content tends to decrease significantly, whereas antioxidant activity increased up to 77.32% on flaking of millets. A significant decrease in peak and final viscosity was observed in millet flakes. A-type diffraction pattern was predominant for unsprouted millets whereas the flaked millets showed V-type crystallinity. The protein digestibility significantly increased up to 37.77% in flakes made from sprouted millets. The mineral bioavailability upon flaking of millets increased, especially Ca (88.22% for little), Fe (43.04% for barnyard) and Zn (61.77% for kodo), which is attributed to the reduction in phytic acid. Flaking, however, led to an increase in rapidly and slowly digestible starch with a corresponding decrease in resistant starch. Among the unsprouted and sprouted millet flakes, foxtail received the highest sensory scores for overall acceptability.
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