Reassignment of the structures of pestalopyrones A–D

Li, Jing; Tan, Yu-Fen; Shao, Lei; Wu, Xiao-Qian; Wang, Jing; Xu, Kang‐Ping; Tan, Gui‐Shan; Zou, Zhen‐Xing; Wang, Wen‐Xuan

doi:10.1016/j.phytochem.2022.113205

Cited by 3 publications

(2 citation statements)

References 47 publications

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“…Diverse acylphloroglucinols with anti-neuroinflammatory activity from Hypericum beanii were studied by Xu et al 99 Ma et al 100 studied meroterpenoids derivatives from the fungus Clitocybe clavipes, including their cytotoxic activity. Reassignment of the structures of pestalopyrones A-D was reported by Wang et al 101 Polychlorinated cyclopentenes from a marine derived Periconia sp. were studied by Oberlies et al 102 Ding et al 103 reported on penaloidines A and B: two unprecedented pyridine alkaloids from Penicillium sp.…”

Section: Nuclear Shielding Calculation In Natural Productsmentioning

confidence: 64%

Theory and computation of nuclear shielding

2023

Nuclear Magnetic Resonance

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This chapter continues earlier reviews of essential works on theoretical issues of nuclear magnetic shieldings published from 1 January to 31 December 2022. As previously, the chapter concentrates on theoretical calculations of nuclear shielding parameters and/or chemical shifts in case of free molecules in the gas phase and solution, and in some cases in the solid state using a periodic formulation. The nuclear shieldings in solution are mainly calculated using inexpensive polarizable continuum model of solvent (PCM). The use of discrete solvent molecules (in particular water and other polar solvents), which is essential for correct description of hydrogen bonding, is often omitted by numerous authors. Most calculations use a relatively simple and fast, but reliable density functional theory (DFT) combined with gauge-including atomic orbital (GIAO) approach. On the other hand, reports on prediction of nuclear magnetic shielding parameters using high level theoretical methods combined with large and flexible basis sets are not so common due to the enormous computational cost. In addition, correction of raw theoretical nuclear magnetic shieldings due to ro-vibration (zero-point vibration correction, ZPVC) and temperature corrections (TC), as well as implicit and explicit solvent effects and relativistic corrections are not often reported.

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Section: Nuclear Shielding Calculation In Natural Productsmentioning

confidence: 64%

Theory and computation of nuclear shielding

2023

Nuclear Magnetic Resonance

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“…Existing research indicates that urban riverside environments serve as a green haven, offering urban dwellers a space for daily strolls and activities [53], thereby facilitating emotional engagement with the environment and contributing to the overall well-being of the populace. In contrast to the demanding urban setting, the composite landscape comprising the blue and green spaces in the high-density urban river channel exerts a positive influence on emotions [54], with varying effects depending on the composition of the riverside spaces. Here, we show that areas adorned with fewer artificial structures and abundant vegetation, including plants and aquatic flora, exhibit superior stress-relieving properties.…”

Section: The Influence Of High-density Urban Riverside Landscape On Moodmentioning

confidence: 97%

The Effect of Perceived Real-Scene Environment of a River in a High-Density Urban Area on Emotions

Li,

Liu,

et al. 2023

Land

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Public sub-health has emerged as a pressing concern in densely populated urban areas. The urban environment, with its innate ability to modulate public emotions, harbors a precious resource in the form of urban rivers, which provide a serene and verdant space. This study focuses on the Liangma River in Chaoyang District, Beijing, selecting two rivers with diverse landscape features as the subjects of research. By employing physiological feedback data in conjunction with a subjective questionnaire, the emotional impact of high-density urban riverside spaces on individuals is quantitatively analyzed. Electrocardiogram (ECG) data, eye movement data, and the positive–negative emotion scale (PANAS) are subjected to data analysis. The study reveals the following key findings: (1) The riverside landscape in high-density urban areas exerts a positive influence on emotional well-being. Individuals in more natural river settings experience greater levels of contentment and relaxation, while those in areas with a higher proportion of artificial elements exhibit increased excitement and happiness. Moreover, scenes characterized by a greater degree of greening have a more pronounced soothing effect on mood. (2) A specific correlation between visual characteristics and emotional fluctuations is observed. The waterfront side of the trail exerts a stronger spatial attraction, and a higher proportion of blue and green spaces significantly contributes to stress relief. (3) The utilization of human-induced engineering technology, which captures emotional changes through physiological feedback, demonstrates a higher level of accuracy and is well-suited for small-scale studies. These findings highlight the potential of arranging diverse types of waterfront footpath landscapes in high-density urban areas and approaching waterfront landscape design and transformation from a novel perspective centered on health intervention. Such efforts hold promise for alleviating the daily pressures faced by the general public and fostering the development of a “healthy city”.

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