d) The indirect spin-spin coupling is a magnetic interaction between at least two NMR nuclei which is transmitted by bonding electrons. This interaction (sometimes also called J coupling) is only ...

来源：BioSyn世纪论文的研究目标及其重要性本论文于2024年10月25日在线发表于JACS。旨在利用生物合成指导和修饰酶催化的方法,发现新的 dhilirane 型杂萜化合物 (DMs)。DMs 是一类罕见的真菌杂萜,具有独特的 ...

References: Dydak U, Jiang YM, Long LL, Zhu H, Chen J, Li WM, et al. In Vivo Measurement of Brain GABA Concentrations by Magnetic Resonance Spectroscopy in Smelters Occupationally Exposed to Manganese ...

引言棕色脂肪组织（BAT）在哺乳动物能量代谢中扮演着重要角色，尤其在寒冷环境下，它通过非颤栗性产热帮助维持体温。BAT的产热过程由去甲肾上腺素激活，依赖线粒体内膜上的解偶联蛋白1（UCP1），通过消耗线粒体内的电化学质子梯度，将能量转化为热量，从而实 ...

Can kinesin keep efficiency high by altering the coupling between its biochemical and mechanical cycles (the number of ATP molecules consumed per step)? Or must it always break down one ATP for ...

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Magnetic couplings are non-contact couplings that use a magnetic field to transfer torque, force or movement from one rotating member to another. The transfer takes place through a non-magnetic ...

Fluid couplings are torque-transmitting couplings that use hydraulic oil or water to transmit power. They differ from torque converters in that the input torque is equal to the output torque (no ...

When CCAR was founded by Dr. George Born in 1985, its focus was in the traditional astrodynamics fields of navigation and orbit determination. Over the years, the center’s research focus has evolved ...

Almost 14 billion years ago, at the very beginning of the Big Bang, a mysterious energy drove an exponential expansion of the ...

Black hole formation could be a little Big Bang in reverse, coupling the matter of a dying star with dark energy, the ...