杂化生物电极在电离环境中的弹性:在伽玛辐射下的印度湖螺的空间模拟研究。

IF 2.6 3区 物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS
Astrobiology Pub Date : 2025-08-01 Epub Date: 2025-08-11 DOI:10.1177/15311074251365212
Nikolay Ryzhkov, Paul J Janssen, Artur Braun
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引用次数: 0

摘要

蓝藻具有独特的生物学特性和执行生命维持过程的能力,这使得它们在太空探索和殖民方面的应用非常有用。它们在生物电和燃料生产方面的潜在用途已经引起了人们的极大兴趣。本研究探讨了电离辐射对生物电极中使用的蓝藻的影响。这是一个重要的考虑因素,因为太空中的辐射水平明显高于地球上的辐射水平,地球上有大气层和磁层的保护。在一个近似的空间辐射模拟环境中,利用伽马辐射,将L. indica菌株PCC 8005(以前称为Arthrospira sp.)的活细胞作为生物电极与硼掺杂金刚石(BDD)涂层和氟掺杂氧化锡(FTO)涂层的玻璃基板连接,并以136 Gy.h-1的急性剂量率暴露于60Co伽马射线下长达14小时;生电能力(即黑暗中的呼吸电流)用计时电流法测量。与未暴露的生物电极相比,即使在高剂量的1.9 kGy伽马射线下,基于印度Limnospira的生物电极在当代中也没有表现出统计学上显著的变化。在辐射下,裸FTO电极的性能优于BDD电极,但蓝藻可以减轻裸BDD电极的负γ诱导效应。高剂量稳定电流的产生凸显了生物光电电化学和生物光伏电池在辐射密集环境和空间应用中的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Resilience of Hybrid Bioelectrodes in an Ionizing Environment: A Space Simulation Study of Limnospira indica Under Gamma Radiation.

Cyanobacteria possess unique biological properties and the ability to perform life-sustaining processes, which make them useful for applications in space exploration and colonization. Their potential use in bioelectricity and fuel production has garnered significant interest. This study explores the effects of ionizing radiation on the cyanobacterium Limnospira indica used in bioelectrodes. This is an important consideration as radiation levels in space are significantly higher than those experienced on Earth with its protective atmosphere and magnetosphere. In an approximate space radiation simulation setting, using gamma radiation, living cells of L. indica strain PCC 8005 (formerly known as Arthrospira sp.) were interfaced as bioelectrodes with boron-doped diamond (BDD)-coated and fluorine-doped tin oxide (FTO)-coated glass substrates and exposed to 60Co gamma rays at an acute dose rate of 136 Gy.h-1 for up to 14 h; electrogenic abilities (i.e., respiration current in the dark) were measured by chronoamperometry. Limnospira indica-based bioelectrodes did not exhibit statistically significant changes in current generation even under high doses of 1.9 kGy gamma rays as compared with non-exposed bioelectrodes. Under radiation, bare FTO electrodes performed better than BDD electrodes, but negative gamma-induced effects in bare BDD electrodes were mitigated by cyanobacteria. The stable current generation under high-dose highlights the potential of biophotoelectrochemical and biophotovoltaic cells in radiation-intensive environments and applications in space.

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来源期刊
Astrobiology
Astrobiology 生物-地球科学综合
CiteScore
7.70
自引率
11.90%
发文量
100
审稿时长
3 months
期刊介绍: Astrobiology is the most-cited peer-reviewed journal dedicated to the understanding of life''s origin, evolution, and distribution in the universe, with a focus on new findings and discoveries from interplanetary exploration and laboratory research. Astrobiology coverage includes: Astrophysics; Astropaleontology; Astroplanets; Bioastronomy; Cosmochemistry; Ecogenomics; Exobiology; Extremophiles; Geomicrobiology; Gravitational biology; Life detection technology; Meteoritics; Planetary geoscience; Planetary protection; Prebiotic chemistry; Space exploration technology; Terraforming
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