A-level阶段在AS基础上增加15个主题,深入拓展化学知识。 有AS Level only、A Level(分两年进行)、A Level(一次完成所有单元考试)三种路线。不同路线对应不同的考试组合,学生可根据自身情况选择。 考试结构:由5套paper组成。 Paper 1为AS阶段选择题,1小时15分钟,40分; Paper 2是AS阶段结构化问题,1小时15分钟,...
The energy level of each orbit under five different separating distances was calculated and depicted together in Supplementary Fig. 12c. It clearly can we find that a lower energy position of antibonding π orbit was obtained as the distance decreased, and Supplementary Fig. 12d confirmed that the...
Biological molecular machines enable chemical transformations, assembly, replication and motility, but most distinctively drive chemical systems out of-equilibrium to sustain life1,2. In such processes, nanometre-sized machines produce molecular energy carriers by driving endergonic equilibrium reactions. Howe...
In summary, this paper compared the WDD material reference and its commercial prescriptions based on UPLC-QTOF-MS and multivariate statistical analysis. The quality of most WDD commercial prescriptions was unstable and significantly different from the WDD material reference, which could impact the ...
In this paper, α-amylase from Bacillus subtilis was successfully immobilized on three supports. First, α-amylase was immobilized on cloisite 30B via the adsorption method. Then cloisite 30B was activated with tosyl chloride and epichlorohydrin. These activated supports were used for covalent immobiliz...
3a). The molecule represented by this peak was unambiguously identified as Fd at the structural level through the analysis of its HRESI MS, 1D- and 2D-NMR spectra (Supplementary Fig. 5‒9). The in vivo biochemical function of PnGH1 was further investigated in Nicotiana benthamiana leaves ...
2-Hydroxyacyl-CoA lyase catalyzes acyloin condensation for one-carbon bioconversion. Nat. Chem. Biol. 15, 900–906 (2019). Article CAS PubMed Google Scholar Yang, X. et al. Systematic design and in vitro validation of novel one-carbon assimilation pathways. Metab. Eng. 56, 142–153 (...
ChemOpen, 10 (2021), p. 327 CrossrefView in ScopusGoogle Scholar [24] W. Wu, Q. He, C. Jiang Magnetic iron oxide nanoparticles: synthesis and surface functionalization strategies Nanoscale Res Lett, 3 (2008), p. 397 View in ScopusGoogle Scholar [25] Jiakun Xu, Jingjing Sun, Yuejun ...
Code to support the paper: P. van Gerwen, K. R. Briling, C. Bunne, V. R. Somnath, R. Laplaza, A. Krause, C. Corminboeuf, "3DReact: Geometric Deep Learning for Chemical Reactions", J. Chem. Inf. Model. 2024, 64, 5771−5785 - GitHub - lcmd-epfl/EquiReac
Electrocatalytic CO2 reduction at near-ambient temperatures requires a complex inventory of protons, hydroxyls, carbonate ions and alkali-metal ions at the cathode and anode to be managed, necessitating the use of ion-selective membranes to regulate pH.