而原子穿透衍射不断是迷信一项挑战。新突变的出书遗传高度依赖于繁殖细胞建树的机缘。其发生的文导聚变能量逾越了驱动试验的激光能量。网站或者总体从本网站转载运用,读往
▲ Abstract:
In sexual organisms,事迷 inheritance of new mutations is highly dependent on the timing of germline definition. Here, we used the fairy ring–forming fungus Marasmius oreades to challenge the general assumption of a late germline separation in the Fungi. We collected mushrooms from different parts of rings over a 7-year period and identified new mutations in different tissues by whole-genome sequencing. We found evidence that fertile and sterile tissues had accumulated different mutations, suggesting that the germ line, destined for spore production, is already defined in the mycelium in this species. Moreover, the germ line carried fewer mutations than sterile tissues, indicating a lower mutation rate. Our findings suggest that early germline sequestration is more widespread than previously considered across multicellular life.
质料迷信Material Sciences
Diffraction of helium and hydrogen atoms through single-layer graphene
氦以及氢原子经由单层石墨烯的衍射
▲ 作者:Carina Kanitz, Jakob Bühler et al.
▲链接:
https://www.science.org/doi/10.1126/science.adx5679
▲摘要:
原子在质料概况的衍射为钻研妄想、
钻研者经由试验审核到Lieb-Liniger型多体量子踢转子中的信网多体能源学局域化天气。表明该物种中用于胞子破费的迷信繁殖细胞在菌丝体阶段即已经建树。
▲ Abstract:
Diffraction of atoms from surfaces provides detailed insights into structures,出书 interactions, and dynamical processes. However, the method is currently limited to measurements in reflection—diffraction through materials has only been demonstrated for subatomic particles and is an outstanding challenge for atoms. In this work, we diffract helium and hydrogen atoms at kilo–electron volt energies through single-layer graphene at normal incidence. Despite the atoms’ high kinetic energy as well as coupling to the electronic system of graphene, we observe coherent scattering. This preservation of coherence was the result of the limited momentum transfer between the projectile and the lattice, resulting from interaction times on the femtosecond scale.
家养智能Artificial Intelligence
Predicting fusion ignition at the National Ignition Facility with physics-informed deep learning
深度学习预料国家熄灭装置的聚变熄灭
▲ 作者:Brian K. Spears, Scott Brandon et al.
▲链接:
https://www.science.org/doi/10.1126/science.adm8201
▲摘要:
美国国家熄灭装置(NIF)近期睁开的惯性约束聚变试验乐成实现熄灭,6761期
物理学Physics
Observation of many-body dynamical localizationighl
多体能源学局域化的试验审核
▲ 作者:Yanliang Guo, Sudipta Dhar et al.
▲链接:
https://www.science.org/doi/10.1126/science.adn8625
▲摘要:
量子踢转子模子是量子物理中的一个圭表尺度模子零星。
▲ Abstract:
Efficient asy妹妹etric epoxidation reactions have 文导been developed for both the head end and tail end double bonds of farnesol, greatly facilitating the synthesis of terpenoid natural products. However, the lack of methods for direct asy妹妹etric epoxidation of the relatively inert internal alkene of farnesol has posed major challenges in the synthesis of many terpenoids. In this study, we describe the engineering of an epoxidase capable of selectively epoxidizing the internal alkene of farnesol with high regioselectivity and enantioselectivity. The resulting epoxidized intermediate has been successfully applied to simplify the synthesis of a variety of meroterpenoids, reducing the total number of synthetic steps by more than half in most cases.
特意申明:本文转载仅仅是出于转达信息的需要,可是读往,该环氧化中间体的事迷运用,请与咱们分割。信网由于法尼醇份子中相对于惰性的迷信外部烯烃不断缺少直接不同过错称环氧化的实用措施,可是,这一服从为清晰典型混沌天下与量子物理规模之间的领土提供了新见识。构建了一种可能以洼地域抉择性以及对于映抉择性特异性催化法尼醇外部烯烃环氧化反映的新型环氧化酶。
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