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• This paper presents an effective approach for coupling relationship analysis in multiple differently parameterized inverters. • All system resonance cases and phenomena are presented. • The proposed method is suitable for all multi-inverter parallel structures. This study investigates the coupling problem between different types of resonances in the system of multiple differently parameterized inverters. The coupling between the inverters and the grid, as well as between differently parameterized inverters, can lead to different types of resonances, which have different resonance characteristics. Due to the absence of resonance coupling relationship analysis, it is difficult to form a unified and complete understanding of the system resonances that are formed by the superposition of different types of resonances. In this paper, the system model is established, and the expressionsof the interactive current circulating between the parallel inverters and input-grid current injecting the power grid can be obtained. Stability analysis of the interactive current and input-grid current reveal characteristics of different types of resonances, and thus the resonance coupling relationship is obtained. It helps to form a complete understanding of system resonance characteristics, and then obtain all system resonance cases. The effects of system parameters on the resonance characteristics and harmonic interaction are analyzed. Finally, the correctness of the theoretical analysis is validated through simulations and experiments. [ABSTRACT FROM AUTHOR]

Hydrogen sulfide (H 2 S) is a vital gas signaling molecule that performs crucial physiological functions in biological systems, and it can also cause food safety problems. In this study, we developed a cyanine derivative-based mitochondrial-targeted near-infrared fluorescent probe PC-H 2 S for detecting H 2 S. When PC-H 2 S reacted with H 2 S, it reached maximum fluorescence intensity at 656 nm and detection limit as low as 34 nM, and exhibited strong chromogenic response from green to red for H 2 S. Moreover, PC-H 2 S could be utilized to identify H 2 S generated during food spoilage and thus monitored the process of food spoilage. More significantly, PC-H 2 S showed excellent mitochondrial targeting capabilities and endogenous/exogenous H 2 S imaging of living cells and zebrafish could be performed. As a result, this research provides an attractive method for detecting H 2 S in food and biological systems and has potential value in physiopathological research. [Display omitted] • A cyanine derivative-based mitochondrial-targeted NIR fluorescent probe PC-H 2 S for detecting H 2 S was developed. • PC-H 2 S had a low detection limit and exhibited strong chromogenic response from green to red for H 2 S in naked eyes and UV light. • PC-H 2 S test strips was capable of monitoring H 2 S produced by food spoilage. • PC-H 2 S could be used for living cells and zebrafish imaging. [ABSTRACT FROM AUTHOR]

[Display omitted] • The structure and biological functions of LDs and their mode of interaction with other organelles are briefly described. • Fluorescent probes that focus on the network of interactions between LDs and other organelles were summarized. • Fluorescent probes reviewed are divided into dual-targeted and multi-targeted based on the number of organelles targeted. • Challenges and directions for developing multi-organelle LDs-associated fluorescent probes are discussed. Lipid droplets, as the centre of lipid metabolism, interact with the endoplasmic reticulum, mitochondria, lysosome, nucleus and other organelles to maintain the body's energy balance through vesicle transport or membrane contact. Disruption of the interaction process will lead to the development of lipid metabolism-related diseases. In recent years, many fluorescent probes have been developed to visually follow the dynamic interaction process visually between lipid droplets and other organelles. Existing reviews on lipid droplets fluorescent probes are mainly categorised and reviewed in terms of the emission band of probes, mother fluorophores and design strategies. However, probes that focus on the interactions between lipid droplets and other organelles can provide further insight into the whole process from lipid droplets formation to transformation as well as the mechanisms of diseases related to lipid metabolism. This paper mainly reviews the progress of fluorescent probes targeting lipid droplets interactions with other organelles in the last five years and is divided into dual-targeted and multi-targeted sections based on the number of targeted organelles. The focus is on the biological contacts and dynamic interaction processes between lipid droplet-centred organelles observed by fluorescence imaging with dual-targeted and multi-targeted probes in the article. The targeting groups and reaction sites of the probes are marked in the figure. Moreover, the paper briefly describes the structure and biological functions of lipid droplets and their connections with other organelles. Perhaps in addition to the imaging performance of the probes, we believe that the use of precision instruments to provide high spatio-temporal resolution and reliable results is also a key factor in observational studies. Finally, we summarize the development prospect of multi-color multi-targeted fluorescent probes related to lipid droplets. We expect to bring novel thinking to the design of lipid droplet fluorescent probes and provide new ideas for exploring diagnostic and therapeutic options for lipid droplet-related diseases. [ABSTRACT FROM AUTHOR]