| 1. |
- Pankratov, Dmitry, et al.
(författare)
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The influence of surface composition of carbon nanotubes on the photobioelectrochemical activity of thylakoid bioanodes mediated by osmium-complex modified redox polymer
- 2019
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Ingår i: Electrochimica Acta. - : Elsevier BV. - 0013-4686. ; 310, s. 20-25
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Tidskriftsartikel (refereegranskat)abstract
- A combination of photosynthetic biocatalysts with high surface area conductive materials mediated by an osmium-complex modified redox polymer (OsRP)holds promising features for the development of sustainable “green” systems for solar energy conversion. In this work we performed a comparative study of two types of carbon nanotubes (CNTs)synthesized by pyrolysis of polymeric precursors. Both CNTs were of similar morphology, but had a different surface C/O ratio. The CNTs were utilized as a support for immobilization of thylakoid membranes, electrochemically wired through the OsRP. The photobioanodes based on the CNTs with a higher C/O ratio exhibit a higher maximum photocurrent density of 97.1 ± 8.3 μA cm −2 at a light intensity of 400 W m −2 with reduced charge transfer resistance, but had lower operational stability. Our results demonstrate the significance of investigating of electrochemical communication between the photosynthetic component, the redox mediator and the support nanomaterial and may offer new opportunities for designing and optimization of mediated bioelectrochemical systems.
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| 2. |
- Wang, Aozhe, et al.
(författare)
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Targeted lipidomics and inflammation response to six weeks of sprint interval training in male adolescents
- 2023
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Ingår i: International Journal of Environmental Research and Public Health. - : MDPI. - 1661-7827 .- 1660-4601. ; 20:4
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Tidskriftsartikel (refereegranskat)abstract
- Lipids play an important role in coordinating and regulating metabolic and inflammatoryprocesses. Sprint interval training (SIT) is widely used to improve sports performance and healthoutcomes, but the current understanding of SIT-induced lipid metabolism and the correspondingsystemic inflammatory status modification remains controversial and limited, especially in maleadolescents. To answer these questions, twelve untrained male adolescents were recruited andunderwent 6 weeks of SIT. The pre- and post-training testing included analyses of peak oxygenconsumption (VO2peak), biometric data (weight and body composition), serum biochemical pa-rameters (fasting blood glucose, total cholesterol, high-density lipoprotein cholesterol, low-densitylipoprotein cholesterol, triacylglycerol, testosterone, and cortisol), inflammatory markers, and tar-geted lipidomics. After the 6-week SIT, the serum C-reactive protein (CRP), interleukin (IL)-1β, IL-2,IL-4, IL-10, tumor necrosis factor (TNF)-α, and transforming growth factor (TGF)-β significantlydecreased (p < 0.05), whereas IL-6 and IL-10/TNF-α significantly increased (p < 0.05). In addition,the targeted lipidomics revealed changes in 296 lipids, of which 33 changed significantly (p < 0.05,fold change > 1.2 or <1/1.2). The correlation analysis revealed that the changes in the inflammatorymarkers were closely correlated with the changes in some of the lipids, such as LPC, HexCer, andFFA. In conclusion, the 6-week SIT induced significant changes in the inflammatory markers andcirculating lipid composition, offering health benefits to the population.
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| 3. |
- Yang, Jianming, et al.
(författare)
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Extremely Low-Cost and Green Cellulose Passivating Perovskites for Stable and High-Performance Solar Cells
- 2019
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Ingår i: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 11:14, s. 13491-13498
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Tidskriftsartikel (refereegranskat)abstract
- The fast evolution of metal halide perovskite solar cells has opened a new chapter in the field of renewable energy. High-quality perovskite films as the active layers are essential for both high efficiency and long-term stability. Here, the perovskite films with enlarged crystal grain size and decreased defect density are fabricated by introducing the extremely low-cost and green polymer, ethyl cellulose (EC), into the perovskite layer. The addition of EC triggers hydrogen bonding interactions between EC and the perovskite, passivating the charge defect traps at the grain boundaries. The long chain of EC further acts as a scaffold for the perovskite structure, eliminating the annealing-induced lattice strain during the film fabrication process. The resulting devices with the EC additive exhibit a remarkably enhanced average power conversion efficiency from 17.11 to 19.27% and an improvement of all device parameters. The hysteresis index is found to decrease by three times from 0.081 to 0.027, which is attributed to suppressed ion migration and surface charge trapping. In addition, the defect passivation by EC significantly improves the environmental stability of the perovskite films, yielding devices that retain 80% of their initial efficiency after 30 days in ambient air at 45% relative humidity, whereas the pristine devices without EC fully degrade. This work provides a low-cost and green avenue for passivating defects that improves both the efficiency and operational stability of perovskite solar cells.
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