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Controlling heat stress (HS) is a global challenge for the dairy industry. In this work, an integrated metabolomics and lipidomics approach using (1)H nuclear magnetic resonance (NMR) and ultra-fast LC-MS in combination with multivariate analyses was employed to investigate the discrimination of plasma metabolic profiles between HS-free and HS lactating(More)
Heat stress (HS) damages the global dairy industry by reducing milk yields and quality, harming health, and damaging the reproduction of dairy cows, causing huge economic losses each year. However, an understanding of the physiological mechanism of HS lactating dairy cows remains elusive. Here, a metabolomics study using LC-MS and (1)H NMR spectroscopy was(More)
A new high-efficiency transformless photovoltaic generation system, which is based on singlephase hybrid clamped three-level inverter, is proposed in this paper. The leakage current problem in transformless photovoltaic generation systems is solved. The elimination of the transformer can not only reduce the cost, size and weight of the conversion stage, but(More)
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