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3-Dimethylsulphoniumpropanoic acid was isolated from Spartina anglica leaves; its structure was determined by spectroscopic methods and confirmed by comparison with a synthetic sample. It is suggested that this compound may have a role in salt resistance. 相似文献
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Henry Keijzer Karen Spruyt Marcel G. Smits Antoon de Geest Leopold M. G. Curfs 《Biological Rhythm Research》2017,48(4):557-566
Dim Light Melatonin Onset (DLMO) is a reliable marker of the endogenous circadian rhythm. To determine if sleep timing can predict DLMO, we investigated the relationship between sleep timing and DLMO in patients in various circadian sleep-wake rhythm disorders (CSWRDs), ages and genders. We found that correlations were only moderate between DLMO and sleep-onset in the complete data-set, but they increased in patients with delayed sleep-wake phase disorder (DSWPD), DSWPD patients with a regular sleep pattern and patients with advanced sleep-wake phase disorder (ASWPD); the levels of correlation were r = 0.542, 0.657, 0.728 and 0.814, respectively. In DSWPD patients with a regular sleep pattern, mid-sleep strongly correlated (r = 0.839) with DLMO. Correlation in other CSRWDs was not significant. DLMO, sleep-onset and age were most discriminated factors between the various CSRWDs. Estimation of DLMO is only possible in patients with ASWPD and in DSWPD patients with a regular sleep pattern. 相似文献
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