Discover insights from thousands of peer-reviewed papers on microbial electrochemical systems
Horticulturae · 2023
Clematis is a perennial ornamental vine known as the “Vine Queen” for its gorgeous floral color and rich flower shape. Clematis tientaiensis, an endangered plant, is a key protected wild plant and a rare breeding parent of Clematis because of its extremely high ornamental value. Light environment is one of the important environmental factors affecting the space distribution and the size of C. tientaiensis population. One-year-old homogenous and healthy potted C. tientaiensis plants were grown under four different light intensities (T1: 1800 ± 30/0 µmol m−2 s−1; T2: 1500 ± 30/0 µmol m−2 s−1; T3: 1200 ± 30/0 µmol m−2 s−1; T4: 900 ± 30/0 µmol m−2 s−1). This study analyzed the potential adaptive mechanism of C. tientaiensis in response to irradiance by investigating the photosynthesis, rapid light curve, chloroplast ultrastructure, Rubisco activase enzyme (RAC), Rubisco enzyme, amino acids, and gene expression under four irradiance treatments. High light caused the leaves chlorosis and yellowing, reduced the net photosynthetic rate (Pn), stomatal conductance (Gs), RAC and Rubisco enzyme activity; the quantum yield of unregulated energy dissipation [Y(NO)], and increased the content of eight amino acids content. The expression of psbA, psbB, psbC, and Psb(OEC) were down-regulated with decreasing irradiance. The results showed that C. tientaiensis plants grown under T1 (1800 ± 30 µmol m−2 s−1) irradiance were in danger of absorbing more light energy than they could use for photosynthesis, while they exhibited good adaptability to the T3 (1200 ± 30 µmol m−2 s−1) irradiance, and the PSII reaction center and Rubisco and RCA enzymes could be the key points in response to high light stress, which also emphasized the importance of appropriate light management practices for promoting the growth and population expansion of C. tientaiensis.
European Journal of Science and Technology · 2020
Biyokütle enerjisi, günümüzün artan enerji taleplerini karşılamakta kaçınılmaz bir görev yürüten yenilenebilir bir enerjidir. Biyoyakıtların aksine, mikrobiyal yakıt hücreleri organik malzemelerde toplanan enerjiyi doğrudan biyoelektrikliğe dönüştürür. Mikrobiyal yakıt hücreleri, kalkınma odaklı ve çok yönlü bir yenilenebilir enerji teknolojisidir. Mikrobiyal yakıt hücresi (MYH), çeşitli organik malzemelerden (substratlardan) elektrik enerjisi üretimi için kullanılan çevre dostu bir teknolojidir. Mikrobiyal yakıt hücreleri, doğrudan elektrik enerjisi üretimi için alternatif bir enerji dönüşüm sistemi olarak büyük ilgi gördü. Mikrobiyal yakıt hücreleri (MYH’ler), atık ortamda yakıt kaynağı olarak düşük dereceli organik karbonları kullanabilir. Mikrobiyal yakıt hücrelerinin, yakıt kaynağı olarak düşük dereceli biyokütle veya hatta atık su kullanabilmesinden dolayı belirgin faydaları vardır. Mikrobiyal yakıt hücrelerinde elektrik üretiminin temeli, organik malzemelerin mikroorganizmalar tarafından katalize edilmesidir. Çünkü mikrobiyal yakıt hücreleri, organik maddeleri (substrat) oksitlemek için biyokatalizörler olarak mikroorganizmaları kullanır. Bir mikrobiyal yakıt hücresinde, organik maddeler (substratlar) elektron vericileridir. Organik malzemelerin oksidasyon (biyokataliz) çalışmalarından sonra anodik biyofilm bakterileri tarafından açığa çıkarılan elektronlar ilk önce anoksik koşullar altında anot elektrota aktarılır. Bu işlemleri yapan bakterilere elektrojen denir. Anot elektrot, elektrojenik biyofilm bakterileri tarafından anaerobik solunum için elektron alıcısı olarak kullanılır. Yani, anot ve mikroorganizma arasında bir elektron transfer işlemi gerçekleşir. Mikroorganizma ve elektrotlar arasındaki elektron transferi, doğrudan elektron transferi ve dolaylı (aracılı) elektron transferi olmak üzere iki mekanizmada gerçekleşir. Bu çalışmada, elektrojenik mikroorganizmalardan anot elektroduna elektron transfer mekanizması ayrıntılı olarak tartışılmıştır. Saf mikroorganizma kültürlerinin mikrobiyal yakıt hücrelerinde kullanımı anlatılmıştır. Bu çalışmanın sonucuna göre, yüksek elektrokimyasal aktivitelere sahip elektrojenik mikroorganizmaların keşfi, muhtemelen gelecekteki pratik sistem çalışmaları için mikrobiyal yakıt hücrelerinin gelişimini teşvik etmek için olağanüstü bir durum olacaktır.
Electrochimica Acta · 2018
World Journal of Microbiology and Biotechnology · 2017
Microsystems & Nanoengineering · 2022
. Furthermore, to realize the array strategy for real-time applications, a 1.7 V/2 mA rating light-emitting diode (LED) was powered by combinations of series and parallel array configurations. The results indicate the reliability of µPSCs to produce electricity from photosynthetic microorganisms for low-power applications. In addition, the results suggest that a combination of microlevel photosynthetic cells in array format represents a powerful optimal design strategy to enhance the power output from µPSCs.
Nature Communications · 2025
Bio-hybrid photoelectrochemical (PEC) devices integrate the complementary advantages of both biocatalyst and abiotic components, providing opportunities for efficient catalysis under mild conditions with high selectivity and low over-potential. However, the practical applications of such devices depend on the stability and efficiency of the bio-abiotic interface, where suboptimal charge transfer, biocatalyst fragility, and scalability challenges persist. In this Perspective, we evaluate established strategies for wiring biocatalysts to electrode substrates within bio-hybrid PEC architectures, analyze their catalytic performance, and operational limitations, and underly mechanistic principles. Then, we highlight the integration of whole-cell biocatalysts with high-performance semiconductor scaffolds as a promising design paradigm, offering a scalable platform for sustainable, solar-driven chemical production.
Biotechnology Letters · 2017
Nanoscale · 2022
@Ag nanoparticles submicromolar hydrogen peroxide concentrations can be detected.
Water Research · 2025
Frontiers in Microbiology · 2023
/C) wastewater under cathodic polarization (-0.4 V and -0.8 V vs. Ag/AgCl). We observed that cathodic polarization and IR irradiation can play a key role in microbial and phenotypic selection, promoting (at -0.4 V) or minimizing (at -0.8 V) the presence of PPB. Then, we further study how cathodic polarization modulates PPB biomass production providing a fluid-like electrode as part of a so-called photo microbial electrochemical fluidized-bed reactor (photoME-FBR). Our results revealed the impact of reduction status of carbon source in wastewater to select the PPB photoheterotrophic community and how electrodes drive microbial population shifts depending on the reduction status of such carbon source.
npj Clean Water · 2025
In algal symbiotic systems (ABSS), bacteria and algae establish mutualistic, commensal, or parasitic relationships, leveraging their respective biosorption and bioaccumulation mechanisms, along with symbiotic effects, to effectively treat heavy metal (HM)-containing wastewater. The HM removal mechanisms by ABSS are modulated by multiple factors, including light intensity, pH, temperature, algal-bacterial ratio, and exhibit distinct patterns for different HMs. Based on a comprehensive literature review, the optimal conditions for ABSS are a light intensity of 60–300 μmol/m2/s, a slightly acidic to neutral pH, a temperature of 23–30 °C, and brown algae being the most effective. Furthermore, the practical applications and limitations of ABSS in different industries producing HM-containing wastewater (such as mining, animal agriculture, urban discharges, and textiles) were discussed, and analyzes its sustainability. This review establishes a robust theoretical framework for ABSS treatment mechanism of HM-containing wastewater, offers practical engineering guidelines, and promotes ABSS research and application.
3 Biotech · 2023
Biotechnology and Bioengineering · 2024
The physiological role of Geobacter sulfurreducens extracellular cytochrome filaments is a matter of debate and the development of proposed electronic device applications of cytochrome filaments awaits methods for large-scale cytochrome nanowire production. Functional studies in G. sulfurreducens are stymied by the broad diversity of redox-active proteins on the outer cell surface and the redundancy and plasticity of extracellular electron transport routes. G. sulfurreducens is a poor chassis for producing cytochrome nanowires for electronics because of its slow, low-yield, anaerobic growth. Here we report that filaments of the G. sulfurreducens cytochrome OmcS can be heterologously expressed in Shewanella oneidensis. Multiple lines of evidence demonstrated that a strain of S. oneidensis, expressing the G. sulfurreducens OmcS gene on a plasmid, localized OmcS on the outer cell surface. Atomic force microscopy revealed filaments with the unique morphology of OmcS filaments emanating from cells. Electron transfer to OmcS appeared to require a functional outer-membrane porin-cytochrome conduit. The results suggest that S. oneidensis, which grows rapidly to high culture densities under aerobic conditions, may be suitable for the development of a chassis for producing cytochrome nanowires for electronics applications and may also be a good model microbe for elucidating cytochrome filament function in anaerobic extracellular electron transfer.
International Journal of Hydrogen Energy · 2018