Airborne sub-pollen particles from rupturing giant ragweed pollen

Airborne sub-pollen particles from rupturing giant ragweed pollen
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巨型豚草花粉破裂后空气中的亚花粉颗粒

DOI:
10.1007/s10453-021-09702-x
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发表时间:
2021
期刊:
影响因子:
2
通讯作者:
Jones, Lillian M.
Jones, Lillian M.
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Stone, Elizabeth A.;Mampage, Chamari B.;Hughes, Dagen D.;Jones, Lillian M.

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相似文献

豚草花粉是夏末和秋季常见的过敏原,会加重季节性过敏性鼻炎和哮喘症状。在大气中,花粉可以渗透破裂产生亚花粉颗粒(SPP)。由于其尺寸较小,SPP 可以比完整的花粉粒更深入地渗透到呼吸道中,并可能引发严重的哮喘病例。在这里,我们使用扫描电子显微镜和单粒子荧光光谱首次表征了由破裂的豚草(Ambrosia trifida)花粉形成的空气中的 SPP。 SPP 的直径范围为 20 nm 至 6.5 μm。大多数SPP能够穿透下呼吸道,其中82%的SPP < 1.0μm,并且是潜在的云凝结核,50%的SPP < 0.20μm。为了支持对 SPP 对健康和环境影响的预测,我们开发了一种基于质量守恒原理来估计每个花粉粒产生的 SPP 数量的定量方法。我们估计,在观察到的尺寸范围内,一粒巨型豚草花粉粒会产生 1400 SPP。本文提出的新测量和方法支持更准确地预测 SPP 的发生、浓度和空气质量影响,有助于减轻过敏性气道疾病的健康负担。图文摘要破裂的豚草花粉释放细胞成分(右),通过倒置光学显微镜观察。
Ragweed pollen is a prevalent allergen in late summer and autumn, worsening seasonal allergic rhinitis and asthma symptoms. In the atmosphere, pollen can osmotically rupture to produce sub-pollen particles (SPP). Because of their smaller size, SPP can penetrate deeper into the respiratory tract than intact pollen grains and may trigger severe cases of asthma. Here we characterize airborne SPP forming from rupturing giant ragweed (Ambrosia trifida) pollen for the first time, using scanning electron microscopy and single-particle fluorescence spectroscopy. SPP ranged in diameter from 20 nm to 6.5 μm. Most SPP are capable of penetrating into the lower respiratory tract, with 82% of SPP < 1.0 μm, and are potential cloud condensation nuclei, with 50% of SPP < 0.20 μm. To support predictions of the health and environmental effects of SPP, we have developed a quantitative method to estimate the number of SPP generated per pollen grain () based upon the principle of mass conservation. We estimate that one giant ragweed pollen grain generates 1400 SPP across the observed size range. The new measurements and method presented herein support more accurate predictions of SPP occurrence, concentration, and air quality impacts that can help to reduce the health burden of allergic airway diseases.Graphic abstractRupturing ragweed pollen releasing cellular components (right), viewed by an inverted light microscope.
DOI: 10.1186/1710-1492-4-3-130
发表时间: 2008-09-15
期刊: Allergy, asthma, and clinical immunology : official journal of the Canadian Society of Allergy and Clinical Immunology
影响因子: --
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