The high-throughput sequencing of small RNAs profiling in wide hybridisation and allopolyploidisation between Brassica rapa and Brassica nigra

Small RNAs play an important role in maintaining the genome reconstruction and stability in the plant. However, little is known regarding the role of small RNAs during the process of wide hybridisation and chromosome doubling. Therefore, the changes in the small RNAs were assessed during the formation of an allodiploid (genome: AB) and its allotetraploid (genome: AABB) between Brassica rapa (♀) and Brassica nigra (♂) in the present study. Here, the experimental methods described in details, RNA-seq data (available at Gene Expression Omnibus database under GSE61872) and analysis published by Ghani et al. [1]. The study showed that small RNAs play an important role in maintaining the genome stability, and regulate gene expression which induces the phenotype variation in the formation of an allotetraploid. This may play an important role in the occurrence of heterosis in the allotetraploid

Enhanced CO₂ Adsorption on Nitrogen-Doped Porous Carbons Derived from Commercial Phenolic Resin

The CO₂-capture potential of porous carbons that have been derived from phenolic resin and doped with nitrogen was assessed in this work. Using carbonized commercial phenolic resin as carbon precursors, a series of carbons have been synthesized using urea modification and KOH activation under different conditions. The activation temperature and mass ratio of KOH to precursor affected the CO₂ uptake capacity. These phenolic-resin-derived carbons show high CO₂ capture capacity, up to 4.61 mmol/g at 25 °C and 7.13 mmol/g at 0 °C under atmospheric pressure. The sample prepared under relatively mild conditions, i.e., activation temperature of 600 °C and mass KOH/precursor of 3, demonstrated the maximum CO₂ uptake capacity under ambient conditions. A systematic study shows that the synergetic effects of narrow microporosity and nitrogen content determine the sorbents’ capability to capture CO₂. In addition, the pore size and the narrow micropores’ distribution affect the CO₂ adsorption capacity of this series of porous carbons. Moreover, these resin-derived carbons show other superior CO₂ capture properties such as fast sorption kinetics, high CO₂/N₂ selectivity, moderate heat of adsorption, stable recyclability, and high dynamic CO₂ capture capacity

Efficient CO₂ Adsorption on Nitrogen-Doped Porous Carbons Derived from d‑Glucose

The synthesis of carbonaceous CO₂ adsorbents doped with nitrogen were carried out via a hydrothermal reaction of biomass d-glucose, followed by urea treatment and K₂CO₃ activation. These carbons display high uptake of CO₂ at 1 bar and 25 and 0 °C, up to 3.92 and 6.23 mmol g^–1, respectively. Additionally, the as-synthesized materials exhibit superior reusability, high CO₂/N₂ selectivity, fast CO₂ adsorption kinetics, and excellent dynamic capture capacity at the experimental conditions used. The synthetic effect of the nitrogen content and narrow microporosity decide the capture capacity for CO₂ at 1 bar and 25 °C for these N-enriched carbonaceous adsorbents. This study provides a viable method to prepare high-performance CO₂ carbonaceous sorbents without using caustic KOH. In addition, this work gives further insights into the CO₂ adsorption mechanism for nitrogen-doped porous carbon sorbents and, hence, inspires ways to synthesize novel carbonaceous materials for removing CO₂ from combustion exhaust gases

Efficient CO₂ Capture by Nitrogen-Doped Biocarbons Derived from Rotten Strawberries

In this study, rotten strawberries were used as carbon precursor to prepare nitrogen-doped porous biocarbons for CO₂ capture. The sorbents were synthesized by hydrothermal treatment of rotten strawberries, followed by KOH activation. The nitrogen in the resulting sorbents is inherited from the rotten strawberry precursor. This series of samples demonstrates high CO₂ uptake at 1 bar, up to 4.49 mmol g^–1 at 25 °C and 6.35 mmol g^–1 at 0 °C. In addition to narrow micropore volume and nitrogen content, the pore size of narrow micropores also plays a key role in determining the CO₂ capture capacity under ambient conditions. Furthermore, these sorbents possess stable reusability, moderate heat of CO₂ adsorption, quick CO₂ adsorption kinetics, reasonable CO₂/N₂ selectivity, and high dynamic CO₂ capture capacity under simulated flue gas conditions. All these merits along with the zero-cost and wide availability of rotten strawberry precursor make this type of sorbent highly promising in CO₂ capture from combustion flue gas