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Updated: Jan 20, 2026

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来自微生物群的抗生素恢复了对抗万科菌的耐药性

Sohn G Kim1,2, Simone Becattini1, Thomas U Moody1,3

  • 1Immunology Program, Sloan Kettering Institute, Memorial Sloan Kettering Cancer Center, New York, NY, USA.

Nature
|August 23, 2019
PubMed
概括

一种肠道细菌的Blautia producta BPSCSK产生一种抗生素,可以降低抗万科菌的Enterococcus faecium (VRE) 殖民. 这种新生细菌及其抗生素有望作为抗VRE感染的益生菌.

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When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:
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A conductor's DC resistance at a given temperature is influenced by its resistivity, length, and cross-sectional area. Resistivity is an inherent property of the conductor material, with annealed copper serving as the international standard for measurement. For instance, the resistivity of hard-drawn aluminum at 20 degrees Celsius is 61% of the standard conductivity of annealed copper.
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Equivalent Resistance

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When a solid cylinder rolls steadily on a rigid surface, the normal force applied by the surface on the cylinder is perpendicular to the tangent at the contact point. However, since no materials are entirely rigid, the surface's reaction to the cylinder involves a range of normal pressures.
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