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"Qin, Fang"
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Single-atom tailored atomically-precise nanoclusters for enhanced electrochemical reduction of CO2-to-CO activity
The development of facile tailoring approach to adjust the intrinsic activity and stability of atomically-precise metal nanoclusters catalysts is of great interest but remians challenging. Herein, the well-defined Au
8
nanoclusters modified by single-atom sites are rationally synthesized via a co-eletropolymerization strategy, in which uniformly dispersed metal nanocluster and single-atom co-entrenched on the poly-carbazole matrix. Systematic characterization and theoretical modeling reveal that functionalizing single-atoms enable altering the electronic structures of Au
8
clusters, which amplifies their electrocatalytic reduction of CO
2
to CO activity by ~18.07 fold compared to isolated Au
8
metal clusters. The rearrangements of the electronic structure not only strengthen the adsorption of the key intermediates *COOH, but also establish a favorable reaction pathway for the CO
2
reduction reaction. Moreover, this strategy fixing nanoclusters and single-atoms on cross-linked polymer networks efficiently deduce the performance deactivation caused by agglomeration during the catalytic process. This work contribute to explore the intrinsic activity and stability improvement of metal clusters.
Tailoring catalytic performance of atomically-precise metal nanoclusters catalysts is of great interest but remains challenging. Here, the authors report a co-eletropolymerization strategy to modify well-defined Au
8
nanoclusters by single-atom sites to enhance its electrocatalytic activity for the reduction of CO
2
towards CO.
Journal Article
E-service quality on live streaming platforms: swift guanxi perspective
Purpose
In recent years, more and more e-retailers have adopted live streaming services to attract customers. Although the extant literature has mostly examined the motivations for live streaming usage, it remains unclear how to enhance customers’ purchase behaviour. Based on the social exchange theory, in the context of live streaming platforms (LSP), this study aims to investigate the impact of information quality and interaction quality on swift guanxi and customers’ purchase intention.
Design/methodology/approach
This study conducted an online survey to conduct two rounds of data collection and analyses the data using SPSS and SmartPLS softwares.
Findings
The results show that information quality (believability, usefulness and vividness) and interaction quality (responsiveness, real-time interaction and empathy) are positively related to swift guanxi, which may influence customers’ online purchase intention on LSP.
Originality/value
Prior service quality studies tend to focus on traditional physical stores and e-commerce websites context. This study offers the description of key dimensions of service quality on emerging LSP context. The study also confirms the importance of swift guanxi in an online marketplace.
Journal Article
Pharmacological strategies to minimize or avoid neuromuscular blocking agents during general anesthesia: a comprehensive approach from airway management to surgical requirements
Neuromuscular blocking agents (NMBAs) are commonly used in general anesthesia and are widely applied in airway management and surgical requirements. However, the traditional use of NMBAs in anesthetic strategies has exposed potential issues, particularly residual neuromuscular blockade, which is associated with respiratory complications, delayed recovery, and prolonged hospitalization. In recent years, strategies aimed at minimizing or avoiding NMBAs have gained attention, especially in balancing airway management with surgical exposure demands during general anesthesia. This review was designed as a structured narrative review rather than a formal systematic review or meta-analysis. This review summarizes the pharmacological strategies for minimizing or avoiding NMBAs, with a focus on distinguishing between NMBA-free anesthesia, which completely avoids NMBAs, and NMBA-sparing anesthesia, which uses low doses or phased administration to minimize their use. Through the combination of other anesthetic agents and depth modulation, strategies for NMBA-free and NMBA-sparing have shown positive results in certain patients and surgeries, particularly in day surgery and fast-track recovery pathways. Nevertheless, this strategy is not suitable for all patients and surgeries, and individualized anesthetic management remains key to its successful implementation. Furthermore, with the introduction of Sugammadex, the rapid reversal of neuromuscular blockade provides assurance for minimizing or avoiding the use of NMBAs. Future research should focus on optimizing drug combinations, verifying non-inferiority, and applying these strategies to specific patient populations, further promoting their clinical adoption.
Journal Article
Properties and applications of quantum dots derived from two-dimensional materials
Quantum dots based on two-dimensional materials (2D-QDs) have received significant attention due to their exceptional physical, chemical, and biological properties. They have shown unprecedented performance and efficiency in many fields including electronics, spintronics, energy, water treatment, sensors, and biological applications. This article provides a critical review on the recent progress of 2D-DQs, their synthesis approaches, categories, properties, and applications. The review introduces various types of 2D-QDs, such as graphene, hBN, silicene, phosphorene, transition metal dichalcogenides, and MXenes that show a wide range of properties applicable for different fields. We describe in detail the electronic, magnetic, optical, catalytic, and biological properties of 2D-QDs and relate them to the suitable applications. Future directions for the research in 2D-QDs are given based on the novel properties provided by the newly discovered 2D materials and their heterostructures.
Journal Article
How perceived attributes of livestreaming commerce influence customer engagement: a social support perspective
PurposeThe boom in livestreaming commerce (LSC) has brought significant changes to social interaction methods. Understanding customer engagement in LSC is critical for online sellers who try to enhance the social influence and improve marketing effectiveness of LSC. Based on the stimulus–organism–response (S–O–R) paradigm, this study aims to develop a model to investigate the effects of perceived attributes of LSC (real-time interaction, perceived proximity and perceived authenticity) on social support (informational and emotional support) and subsequent engagement.Design/methodology/approachAn online survey is conducted to collect data from LSC customers, and data are analyzed using SPSS and SmartPLS.FindingsThe results indicate that informational and emotional support are positively affected by real-time interaction, perceived proximity and perceived authenticity. In turn, informational and emotional support enable and mediate the prediction of customer engagement intention in LSC.Originality/valuePrior LSC studies tend to focus on the motivation influencing LSC engagement from the perspective of perceived value. This study confirms the importance of perceived attributes of LSC in driving customer engagement from the perspective of social support.
Journal Article
OsARM1, an R2R3 MYB Transcription Factor, Is Involved in Regulation of the Response to Arsenic Stress in Rice
Bioaccumulation of arsenic (As) in rice (
) increases human exposure to this toxic, carcinogenic element. Recent studies identified several As transporters, but the regulation of these transporters remains unclear. Here, we show that the rice R2R3 MYB transcription factor OsARM1 (ARSENITE-RESPONSIVE MYB1) regulates As-associated transporters genes. Treatment with As(III) induced
transcript accumulation and an OsARM1-GFP fusion localized to the nucleus. Histochemical analysis of
lines indicated that
was expressed in the phloem of vascular bundles in basal and upper nodes. Knockout of
(
CRISPR/Cas9-generated mutants) improved tolerance to As(III) and overexpression of
(
lines) increased sensitivity to As(III). Measurement of As in As(III)-treated plants showed that under low As(III) conditions (2 μM), more As was transported from the roots to the shoots in
. By contrast, more As accumulated in the roots in
in response to high As(III) exposure (25 μM). In particular, the As(III) levels in node I were significantly higher in
, but significantly lower in
, compared to wild-type plants, implying that OsARM1 is important for the regulation of root-to-shoot translocation of As. Moreover,
, and
, which encode key As transporters, were significantly downregulated in
and upregulated in
compared to wild type. Chromatin immunoprecipitation-quantitative PCR of
indicated that OsARM1 binds to the conserved MYB-binding sites in the promoters or genomic regions of
, and
in rice. Our findings suggest that the OsARM1 transcription factor has essential functions in regulating As uptake and root-to-shoot translocation in rice.
Journal Article
Root Phenotyping for Drought Tolerance: A Review
Plant roots play a significant role in plant growth by exploiting soil resources via the uptake of water and nutrients. Root traits such as fine root diameter, specific root length, specific root area, root angle, and root length density are considered useful traits for improving plant productivity under drought conditions. Therefore, understanding interactions between roots and their surrounding soil environment is important, which can be improved through root phenotyping. With the advancement in technologies, many tools have been developed for root phenotyping. Canopy temperature depression (CTD) has been considered a good technique for field phenotyping of crops under drought and is used to estimate crop yield as well as root traits in relation to drought tolerance. Both laboratory and field-based methods for phenotyping root traits have been developed including soil sampling, mini-rhizotron, rhizotrons, thermography and non-soil techniques. Recently, a non-invasive approach of X-ray computed tomography (CT) has provided a break-through to study the root architecture in three dimensions (3-D). This review summarizes methods for root phenotyping. On the basis of this review, it can be concluded that root traits are useful characters to be included in future breeding programs and for selecting better cultivars to increase crop yield under water-limited environments.
Journal Article
The AMP-Activated Protein Kinase KIN10 Is Involved in the Regulation of Autophagy in Arabidopsis
Autophagy is a highly conserved system in eukaryotes for the bulk degradation and recycling of intracellular components. Autophagy is involved in many physiological processes including development, senescence, and responses to abiotic and biotic stress. The adenosine 5'-monophosphate (AMP)-activated protein kinase AMPK positively regulates autophagy in mammals; however, the potential function of AMPK in plant autophagy remains largely unknown. Here, we identified KIN10, a plant ortholog of the mammalian AMPK, as a positive regulator of plant autophagy and showed that it acts by affecting the phosphorylation of ATG1 (AUTOPHAGY-RELATED GENE 1) proteins in
. Transgenic
lines overexpressing
(
) showed delays in leaf senescence, and increased tolerance to nutrient starvation, these phenotypes required a functional autophagy pathway. Consistent with KIN10 having a potential role in autophagy, the nutrient starvation-induced formation of autophagosomes and cleavage of GFP-ATG8e were accelerated in the
lines compared to the wild type. Moreover, the
lines were less sensitive to drought and hypoxia treatments, compared with wild type. Carbon starvation enhanced the level of phosphorylated YFP-ATG1a in the
lines compared to that of wild type. Together, these findings suggest that KIN10 is involved in positive regulation of autophagy, possibly by affecting the phosphorylation of ATG1s in
.
Journal Article
DIACYLGLYCEROL ACYLTRANSFERASE and DIACYLGLYCEROL KINASE Modulate Triacylglycerol and Phosphatidic Acid Production in the Plant Response to Freezing Stress
Plants accumulate the lipids phosphatidic acid (PA), diacylglycerol (DAG), and triacylglycerol (TAG) during cold stress, but how plants balance the levels of these lipids to mediate cold responses remains unknown. The enzymes ACYL-COENZYME A:DIACYLGLYCEROL ACYLTRANSFERASE (DGAT) and DIACYLGLYCEROL KINASE (DGK) catalyze the conversion of DAG to TAG and PA, respectively. Here, we show that DGAT1, DGK2, DGK3, and DGK5 contribute to the response to cold in Arabidopsis (Arabidopsis thaliana). With or without cold acclimation, the dgat1 mutants exhibited higher sensitivity upon freezing exposure compared with the wild type. Under cold conditions, the dgat1 mutants showed reduced expression of C-REPEAT/DRE BINDING FACTOR2 and its regulons, which are essential for the acquisition of cold tolerance. Lipid profiling revealed that freezing significantly increased the levels of PA and DAG while decreasing TAG in the rosettes of dgat1 mutant plants. During freezing stress, the accumulation of PA in dgat1 plants stimulated NADPH oxidase activity and enhanced RbohD-dependent hydrogen peroxide production compared with the wild type. Moreover, the cold-inducible transcripts of DGK2, DGK3, and DGK5 were significantly more up-regulated in the dgat1 mutants than in the wild type during cold stress. Consistent with this observation, dgk2, dgk3, and dgk5 knockout mutants showed improved tolerance and attenuated PA production in response to freezing temperatures. Our findings demonstrate that the conversion of DAG to TAG by DGAT1 is critical for plant freezing tolerance, acting by balancing TAG and PA production in Arabidopsis.
Journal Article