Background Phaeodactylum tricornutum accumulates lipids while the growth also increases under high cO2, shedding light on its potential application in the reduction of cO2 emissions and at the same time acquiring biod...
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Background Phaeodactylum tricornutum accumulates lipids while the growth also increases under high cO2, shedding light on its potential application in the reduction of cO2 emissions and at the same time acquiring biodiesel raw materials. However, the sensing and transducing of high c:N signals and the related response mechanism(s) remained unknown. Results In this study, a multiple omics analysis was performed with P. tricornutum under low nitrogen (LN) and high cO2 (Hc) conditions. The results indicated that 2-oxoglutarate was significantly increased under both LN and Hc. Meanwhile, proteins involved in carbon concentration mechanism decreased, indicated that 2-oxoglutarate might regulate c:N balance through suppressing carbon fixation. Lactate, which acts in energy metabolism, signal transduction and 'LactoylLys' modification on proteins, was the most upregulated metabolite under both LN and Hcconditions. Meanwhile, proteins involved in carbon, nitrogen and energy metabolisms were significantly regulated. Western blotting analysis suggested that non-histone L-lactylation modification was enhanced under LN and Hc. Moreover, lactylated proteins were enriched in photosynthesis, central carbon metabolism, nitrogen metabolism, fatty acid synthesis and oxidative phosphorylation. conclusion It is suggested that lactate might play important roles in energy homeostatic maintenance and c:N balance regulation in P. tricornutum through protein lactylation modification.
Biochar application is a potent climate change mitigation strategy in agroecosystems. However, little is known about the interactive effects of elevated cO2 (ecO2) and biochar on plant nutrient uptake and soil microbi...
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Biochar application is a potent climate change mitigation strategy in agroecosystems. However, little is known about the interactive effects of elevated cO2 (ecO2) and biochar on plant nutrient uptake and soil microbial processes. A pot experiment was conducted to investigate the effects of ecO2 and biochar addition on plant c:N:P stoichiometry and rhizobacterial community for better management of nutrient balance and use efficiency in a future climate scenario. White lupin (Lupinus albus L.) was grown for 30 days in topsoil and subsoil with or without 2% corn-stubble biochar under ambient cO2 (acO2: 390 ppm) or ecO2 (550 ppm). Elevated cO2 increased, but biochar decreased, plant biomass and shoot N and P uptake, with no interactions in either soil layer. Elevated cO2 decreased shoot N concentration by 16% and biochar decreased shoot P concentration by 11%. As a result, ecO2 increased shoot c:N ratio by 20% and decreased the N:P ratio by 11%. Biochar decreased shoot c:N ratio by 8% in the subsoil under ecO2. However, biochar increased shoot c:P ratio by an average of 13% and N:P ratio by 23% in the subsoil. Moreover, plants grown in the subsoil showed lower shoot N (35%) and P (70%) uptake compared to the topsoil. The results indicate that N and P are the more limiting factors that regulate plant growth under ecO2 and biochar application, respectively. Elevated cO2 and biochar oppositely affected dominant rhizobacterial community composition, with the ecO2 effect being greater. The microbiota in the subsoil held a greater diversity of contrasting species than the topsoil, which were associated with nutrient cycling, hydrocarbon degradation and plant productivity. These results enrich our understanding of potential soil nutrient cycling and plant nutrient balance in future agroecosystems.
Doping is an effect strategy to improve the visible-light-driven photocatalytic activities of g-c3N4. Herein, c, Ocodoped nano-structured g-c3N4 was facilely synthesized in one pot by introducing ordinary ethanol into...
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Doping is an effect strategy to improve the visible-light-driven photocatalytic activities of g-c3N4. Herein, c, Ocodoped nano-structured g-c3N4 was facilely synthesized in one pot by introducing ordinary ethanol into the polymerization process of melamine. It exhibited favorable visible-light-driven photocatalytic hydrogen production activity 4.29 times higher than that of bulk g-c3N4 synthesized from pure melamine. The enhanced photocatalytic activities benefit from the improvements in both optical absorption and photo-induced exciton separation, which is induced by the midgap states caused by c, O-doping. The proposed method has also been demonstrated versatile to improve g-c3N4 samples derived from other c/N precursors (dicyandiamide and cyanamide).
In this study, a lightweight and robust Ti 3 c 2 T x /carbon nanotubes (cNTs) foam (TcF) was fabricated using Hcl-induced self-assembly, followed by vacuum freeze-drying. The electrical conductivity and mechanical ela...
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In this study, a lightweight and robust Ti 3 c 2 T x /carbon nanotubes (cNTs) foam (TcF) was fabricated using Hcl-induced self-assembly, followed by vacuum freeze-drying. The electrical conductivity and mechanical elasticity of the TcF was higher than those of monolithic Ti 3 c 2 T x foams. This was ascribed to the incorporation of cNTs into Ti 3 c 2 T x preventing the stacking of the Ti 3 c 2 T x nanosheets and producing a well-developed three-dimensional honeycomb-like porous network structure, which considerably improved impedance matching, promoted multiple reflection loss, increased conduction loss and polarisation loss, thus imparting remarkable microwave absorption properties to the TcF. The 1.72 and 1.92 mm thick TcF samples with absorber loadings of 4 wt%, which were obtained by immersing TcF into molten paraffin, followed by cutting it into coaxial rings, presented an optimum reflection loss of −48.8 dB and a maximum effective absorption bandwidth (EAB) of 5.44 GHz, respectively. Moreover, upon increasing the thickness of the TcF samples from 1.52 to 4.92 mm, the EAB could be regulated from 4.16 to 18 GHz, respectively. In this study, we developed a facile method for fabricating a lightweight and robust TcF, which met the ‘light, thin, broad, and strong’ criteria and presented a broad EAB and remarkable dissipation capability, for microwave absorption materials.
To overcome the deficiency of the volume expansion of MoS(2)as the anode material for lithium-ion batteries (LIBs), an effective strategy was developed to design hierarchical porous MoS2/carbon nanospheres via a facil...
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To overcome the deficiency of the volume expansion of MoS(2)as the anode material for lithium-ion batteries (LIBs), an effective strategy was developed to design hierarchical porous MoS2/carbon nanospheres via a facile, easy-operated hydrothermal method followed by annealing. FESEM and TEM images clearly showed that nanospheres are composed of ultra-thin MoS2/c nanosheets coated with carbon layer and possess an expanded interlayer spacing of 0.98 nm. As anodes for LIBs, MoS2/carbon nanospheres deliver an initial discharge capacity of 1307.77 mAh g(-1)at a current density of 0.1 A g(-1). Moreover, a reversible capacity of 612 mAh g(-1)was obtained even at 2 A g(-1)and a capacity retention of 439 mAh g(-1)after 500 cycles at 1 A g(-1). The improved electrochemical performance is ascribed to the hierarchical porous structure as well as the intercalation of carbon into lattice spacing of MoS2, which offers fast channels for ion/electron transport, relieves the influence of volume change and increases electrical conductivity of electrode. Meanwhile, the expanded interlayer spacing of MoS(2)in MoS2/ccan decrease the ion diffusion resistance and alleviate the volumetric expansion during discharge/charge cycles.
Superior electrode materials play a key role on the electrochemical performance for the lithium-ion batteries and supercapacitors. The co3O4-based materials are promising electrode materials due to their high specific...
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Superior electrode materials play a key role on the electrochemical performance for the lithium-ion batteries and supercapacitors. The co3O4-based materials are promising electrode materials due to their high specificcapacity and energy density. However, the poor cycle performance limits their applications during the process of the commercialization for the lithium-ion batteries and supercapacitors. Because of the poor cycle stability, c, N co-doped co3O4 hollow spheres are successfully prepared and used as electrode materials for the lithium-ion batteries and supercapacitors. Via the c, N co-doping process, the electronicconductivity is greatly improved. Moreover, the hollow structure could ensure the structural stability during the electrochemical process. As a result, the cycle performance and specificcapacity are greatly improved when the c, N co-doped co3O4 composites are used as electrode materials for the lithium-ion batteries and supercapacitors. (c) 2019 Hydrogen Energy Publications LLc. Published by Elsevier Ltd. All rights reserved.
Some studies have assessed the expression of dopaminergic dopamine 2 (D2)/3 receptors in prolactinomas and nonfunctioning pituitary adenomas (NFPA) by positron emission tomography/computed tomography (PET/cT) with
Some studies have assessed the expression of dopaminergic dopamine 2 (D2)/3 receptors in prolactinomas and nonfunctioning pituitary adenomas (NFPA) by positron emission tomography/computed tomography (PET/cT) with
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