专题

专题封面

生物工程

专题编委

  • 全选
  • 同时提升糖氨基转移酶热稳定性及对非天然底物催化活性实现糖苷酶抑制剂井冈霉烯胺的高效合成
    王润希 乔路 刘慕非 冉艳朋 王军 闫武鹏 冯雁 崔莉
    Engineering 2024, 42(11): 194. https://doi.org/10.1016/j.eng.2024.04.026

    We present results of a series of experiments aimed at finding the most direct fingerprints of a phenomenon of nuclear chirality. These experiments brought a detailed knowledge of the so called partner bands in 132La, 128Cs and 126Cs including absolute values of E2 and M1 transition probabilities obtained through the DSA (Doppler Shift Attenuation) method. Considering the indirect character of observables such as energies and transition rates we proposed measurement of the g-factor of a chosen state as a direct, ultimate test of chirality. Our experiment on the bandhead of partner bands in 128Cs showed feasibility of this approach. Measured value of the g-factor which suggests non-chiral character of this state leads to another puzzle in the chirality studies — how the chirality emerges with increasing spin of levels along a partner band.

  • 厌氧氨氧化促进地球活性氮平衡的恢复
    祝贵兵 兰邦瑞 刘述慈 Cameron M. Callbeck 王衫允 姜丽萍 Asheesh Kumar Yadav Jan Vymazal Mike S. M. Jetten 张甘霖 朱永官
    Engineering 2024, 38(7): 199. https://doi.org/10.1016/j.eng.2023.09.013

    We present results of a series of experiments aimed at finding the most direct fingerprints of a phenomenon of nuclear chirality. These experiments brought a detailed knowledge of the so called partner bands in 132La, 128Cs and 126Cs including absolute values of E2 and M1 transition probabilities obtained through the DSA (Doppler Shift Attenuation) method. Considering the indirect character of observables such as energies and transition rates we proposed measurement of the g-factor of a chosen state as a direct, ultimate test of chirality. Our experiment on the bandhead of partner bands in 128Cs showed feasibility of this approach. Measured value of the g-factor which suggests non-chiral character of this state leads to another puzzle in the chirality studies — how the chirality emerges with increasing spin of levels along a partner band.

  • 重构异戊二烯焦磷酸代谢以促进萜类化合物的合成
    徐显皓 吕雪芹 崔世修 刘延峰 夏洪志 李江华 堵国成 李兆丰 陈坚 刘龙
    Engineering 2023, 28(9): 166. https://doi.org/10.1016/j.eng.2023.03.019

    We present results of a series of experiments aimed at finding the most direct fingerprints of a phenomenon of nuclear chirality. These experiments brought a detailed knowledge of the so called partner bands in 132La, 128Cs and 126Cs including absolute values of E2 and M1 transition probabilities obtained through the DSA (Doppler Shift Attenuation) method. Considering the indirect character of observables such as energies and transition rates we proposed measurement of the g-factor of a chosen state as a direct, ultimate test of chirality. Our experiment on the bandhead of partner bands in 128Cs showed feasibility of this approach. Measured value of the g-factor which suggests non-chiral character of this state leads to another puzzle in the chirality studies — how the chirality emerges with increasing spin of levels along a partner band.