Addressing the challenges faced by team leaders in fostering both individual and team creativity, this research developed and tested a multilevel model connecting dual-focused transformational ...leadership (TFL) and creativity and incorporating intervening mechanisms at the two levels. Using multilevel, multisource survey data from individual members, team leaders, and direct supervisors in high-technology firms, we found that individual-focused TFL had a positive indirect effect on individual creativity via individual skill development, whereas team-focused TFL impacted team creativity partially through its influence on team knowledge sharing. We also found that knowledge sharing constituted a cross-level contextual factor that moderated the relationship among individual-focused TFL, skill development, and individual creativity. We discuss the theoretical and practical implications of this research and offer suggestions for future research.
Purely organic room-temperature phosphorescence has attracted attention for bioimaging but can be quenched in aqueous systems. Here we report a water-soluble ultralong organic room-temperature ...phosphorescent supramolecular polymer by combining cucurbitnuril (CB7, CB8) and hyaluronic acid (HA) as a tumor-targeting ligand conjugated to a 4-(4-bromophenyl)pyridin-1-ium bromide (BrBP) phosphor. The result shows that CB7 mediated pseudorotaxane polymer CB7/HA-BrBP changes from small spherical aggregates to a linear array, whereas complexation with CB8 results in biaxial pseudorotaxane polymer CB8/HA-BrBP which transforms to relatively large aggregates. Owing to the more stable 1:2 inclusion complex between CB8 and BrBP and the multiple hydrogen bonds, this supramolecular polymer has ultralong purely organic RTP lifetime in water up to 4.33 ms with a quantum yield of 7.58%. Benefiting from the targeting property of HA, this supramolecular polymer is successfully applied for cancer cell targeted phosphorescence imaging of mitochondria.
A sensor with a red‐emission signal is successfully obtained by the solvothermal reaction of Eu3+ and heterofunctional ligand bpydbH2 (4,4′‐(4,4′‐bipyridine‐2,6‐diyl) dibenzoic acid), followed by ...terminal‐ligand exchange in a single‐crystal‐to‐single‐crystal transformation. As a result of treatments both before and after the metal–organic framework formation, accessible Lewis‐base sites and coordinated water molecules are successfully anchored onto the host material, and they act as signal transmission media for the recognition of analytes at the molecular level. This is the first reported sensor based on a metal–organic framework (MOF) with multi‐responsive optical sensing properties. It is capable of sensing small organic molecules and inorganic ions, and unprecedentedly it can discriminate among the homologues and isomers of aliphatic alcohols as well as detect highly explosive 2,4,6‐trinitrophenol (TNP) in water or in the vapor phase. This work highlights the practical application of luminescent MOFs as sensors, and it paves the way toward other multi‐responsive sensors by demonstrating the incorporation of various functional groups into a single framework.
Multi‐responsive fluorescent sensing is achieved using a Eu metal–organic framework (EuMOF). Accessible Lewis‐base sites and coordinated water molecules are successfully anchored on the EuMOF‐based sensor for the recognition of different analytes at the molecular level. This strategy paves the way for the practical application of luminescent MOF sensors in pollutant‐detection.
This research examines how team members’ passion for innovation compiles to contribute to team innovation. We argue that team mean passion influences team innovation by affecting team reflexivity, ...which is a key team process for members to collectively reflect on and adjust their efforts toward achieving innovation goals. The indirect effect of mean passion on team innovation via team reflexivity depends on the nature of passion—harmonious passion (HP) versus obsessive passion (OP)—and the diversity of the corresponding type of passion. Results from a two‐wave field study of 131 teams and a three‐wave field study of 155 teams support the differential effects of compiled HP and OP. Moreover, the effect of mean HP on team reflexivity and its indirect effect on team innovation via reflexivity were less positive when HP diversity was higher rather than lower, while the effect of mean OP on team reflexivity and its indirect effect on team innovation via reflexivity were less negative when OP diversity was higher rather than lower. This research offers important theoretical and practical implications for literatures on passion, teams, and team innovation.
The development of a green and sustainable process for electrochemical ammonia synthesis has a significant impact on modern society in terms of agricultural and industrial development, as well as ...energy reform. The electrocatalytic nitrogen reduction reaction (NRR) has been regarded as a promising strategy and the efficiency of the NRR strongly depends on electrocatalysts with excellent activity, selectivity, and stability. Metal sulfides have been regarded as potential electrocatalysts due to the "accept and back-donate" interaction of metals with N
2
. In addition, it has been proposed that both the intrinsic and extrinsic catalytic activity, selectivity and stability of metal sulfides can be improved through defect and interface engineering. In this review, the recent progress on metal sulfides toward the NRR is summarized based on defect and interface engineering. The typical synthetic methods, physicochemical properties, and catalytic performances of the catalysts are outlined to provide insights into the structure-performance relationship of the catalysts. In particular, the origin of the outstanding NRR catalytic activity, selectivity and stability was revealed from both experimental and theoretical perspectives. Furthermore, the remaining challenges and future perspectives are presented with the aim of providing insightful guidance for developing more efficient NRR electrocatalysts.
The recent progress on metal sulfides toward the nitrogen reduction reaction (NRR) is summarized based on defect and interface engineering.
The present study was performed to evaluate the effects of seed priming. This was done by soaking the seeds of two rapeseed cultivars, namely, ZY15 (tolerant to low temperature and drought) and HY49 ...(sensitive to low temperature and drought), for 12 h in varying solutions: distilled water, 138 mg/L salicylic acid (SA), 300 mg/L gibberellic acid (GA), 89.4 mg/L sodium nitroprusside (SNP), 3000 mg/L calcium chloride (CaCl2), and 30 mg/L abscisic acid (ABA). Primed and non-primed seeds were left to germinate at 15°C and -0.15 MPa (T15W15) and at 25°C and 0 MPa (T25W0), respectively. The results showed that SA, GA, SNP, CaCl2, and ABA significantly improved the germination potential (GP), germination rate (GR), germination index (GI), stem fresh weight (SFW), stem dry weight (SDW), root length (RL), stem length (SL), and seed vigor index (SVI) under T15W15. For ZY15 seeds under T25W0, GA, SNP, CaCl2, and ABA priming reduced the average germination time (96% after 5 days) compared to that of the control (88% after 5 days). For ZY15 seeds under T15W15, SA, SNP, CaCl2, and ABA priming, with respect to the control and water-treated groups, shortened the average germination time (92% after 5 days) compared to that of the control (80% after 5 days). For HY49 seeds under T25W0, GA, SNP, CaCl2, and ABA priming reduced the average germination time (92% after 5 days) compared to that of the control (85% after 5 days). Similarly, for HY49 seeds under T15W15, GA priming shortened the average germination time (89% after 5 days) compared to that of the control (83% after 5 days). These priming agents increased the net photosynthesis, stomatal conductivity, and transpiration rate of rape seedlings under conditions of low temperature and drought stress, while also decreasing intercellular carbon dioxide (CO2) concentrations. Additionally, SA, GA, SNP, CaCl2, and ABA increased superoxide dismutase concentrations (SOD) and ascorbic peroxidase (APX) activities of rape seedlings under stress conditions, while decreasing catalase (CAT) and peroxidase (POD) activities in ZY15 seedlings. In HY49, which is sensitive to low temperature and drought, all priming solutions, except for SNP, led to an increase in SOD activity levels and a decrease in CAT activity levels. Overall, SA, GA, SNP, and CaCl2 increased the concentrations of indoleacetic acid (IAA), GA, ABA, and cytokinin (CTK) in seedlings under stress conditions. Moreover, compared to SA, CaCl2, and ABA, GA (300 mg/L) and SNP (300 mol/L) showed improved priming effects for ZY15 and HY49 under stress conditions.
Serum resistance is a poorly understood but common trait of some difficult-to-treat pathogenic strains of bacteria. Here, we report that glycine, serine and threonine catabolic pathway is ...down-regulated in serum-resistant Escherichia coli, whereas exogenous glycine reverts the serum resistance and effectively potentiates serum to eliminate clinically-relevant bacterial pathogens in vitro and in vivo. We find that exogenous glycine increases the formation of membrane attack complex on bacterial membrane through two previously unrecognized regulations: 1) glycine negatively and positively regulates metabolic flux to purine biosynthesis and Krebs cycle, respectively. 2) α-Ketoglutarate inhibits adenosine triphosphate synthase, which in together promote the formation of cAMP/CRP regulon to increase the expression of complement-binding proteins HtrE, NfrA, and YhcD. The results could lead to effective strategies for managing the infection with serum-resistant bacteria, an especially valuable approach for treating individuals with weak acquired immunity but a normal complement system.
MicroRNAs (miRNAs) play important roles in rice response to Magnaporthe oryzae, the causative agent of rice blast disease. Studying the roles of rice miRNAs is of great significance for the disease ...control. Osa‐miR167d belongs to a conserved miRNA family targeting auxin responsive factor (ARF) genes that act in developmental and stress‐induced responses. Here, we show that Osa‐miR167d plays a negative role in rice immunity against M. oryzae by suppressing its target gene. The expression of Osa‐miR167d was significantly suppressed in a resistant accession at and after 24 h post inoculation (hpi), however, its expression was significantly increased at 24 hpi in the susceptible accession upon M. oryzae infection. Transgenic rice lines over‐expressing Osa‐miR167d were highly susceptible to multiple blast fungal strains. By contrast, transgenic lines expressing a target mimicry to block Osa‐miR167d enhanced resistance to rice blast disease. In addition, knocking out the target gene ARF12 led to hyper‐susceptibility to multiple blast fungal strains. Taken together, our results indicate that Osa‐miR167d negatively regulate rice immunity to facilitate the infection of M. oryzae by downregulating ARF12. Thus, Osa‐miR167d‐ARF12 regulatory module could be valuable in improvement of blast‐disease resistance.
Rice blast caused by Magnaporthe oryzae is one of the most destructive diseases. Here we demonstrated that rice Osa‐miR167d facilitates the infection of M. oryzae by suppressing ARF12, and ARF12 is required for resistance to the blast disease. Our findings suggest that the Osa‐miR167d‐ARF12 regulatory module is valuable in blast‐disease breeding programs.
A series of lanthanide metal‐organic frameworks (Ln‐MOFs) are synthesized through solvothermal conditions with 1,3‐bis(4‐carboxyphenyl)imidazolium (H2L). Owing to the lanthanide contraction effect, ...two different types of Ln‐MOFs, namely, {Ln(L)2(OH)·3H2O}n (Ln:Pr, Nd, Sm) and {Ln(L)2(COO)(H2O)2·H2O}n (Ln: Eu, Gd, Tb, Dy, Tm, Yb, Y), and their corresponding codoped Ln‐MOFs EuxTb1‐xL are obtained. With careful adjustment of the relative concentration of the lanthanide ions and the excitation wavelength, the color of the luminescence can be systematically modulated and white light emission can be further successfully achieved. Furthermore, by virtue of the temperature‐dependent luminescent behavior, Eu0.2Tb0.8L allows for the design of a thermometer with an excellent linear response to temperature over a wide range, from 40 to 300 K. This work highlights the practical applications of Ln‐MOFs for tailoring fluorescent color and even obtaining practical white light emission, and especially for sensing temperature as luminescent thermometers in a single framework by controlling in different ways.
Codoped Ln‐metal‐organic frameworks EuxTb1‐xL are synthesized based on the isostructural Ln‐metal‐organic frameworks using lanthanide ion emitters. With careful adjustment of the relative concentration of the lanthanide ions and the excitation wavelength, the emission trajectory can be modulated, allowing white emission. Furthermore, Eu0.2Tb0.8L allows for the design of a thermometer operating over a wide range, from 40 to 300 K.
Rumen microbiota play a key role in the digestion and utilization of plant materials by the ruminant species, which have important implications for greenhouse gas emission. Yet, little is known about ...the key taxa and potential gene functions involved in the digestion process. Here, we performed a genome-centric analysis of rumen microbiota attached to six different lignocellulosic biomasses in rumen-fistulated cattle. Our metagenome sequencing provided novel genomic insights into functional potential of 523 uncultured bacteria and 15 mostly uncultured archaea in the rumen. The assembled genomes belonged mainly to Bacteroidota, Firmicutes, Verrucomicrobiota, and Fibrobacterota and were enriched for genes related to the degradation of lignocellulosic polymers and the fermentation of degraded products into short chain volatile fatty acids. We also found a shift from copiotrophic to oligotrophic taxa during the course of rumen fermentation, potentially important for the digestion of recalcitrant lignocellulosic substrates in the physiochemically complex and varying environment of the rumen. Differential colonization of forages (the incubated lignocellulosic materials) by rumen microbiota suggests that taxonomic and metabolic diversification is an evolutionary adaptation to diverse lignocellulosic substrates constituting a major component of the cattle's diet. Our data also provide novel insights into the key role of unique microbial diversity and associated gene functions in the degradation of recalcitrant lignocellulosic materials in the rumen.
PDF
