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As an emerging collaboration platform based on web 2.0 technologies, enterprise social media can provide opportunities and challenges for information acquisition and creativity development. However, existing research on the ways in which enterprise social media use affects employee creativity from both internal and external team perspectives is rather limited. Using communication visibility theory (CVR), this paper proposes a research model for investigating the relationship between enterprise social media (ESM) usage and employee creativity. Drawing on an analysis of 218 employees' data, this study found that ESM, when used for both work and social purposes, has a positive effect on internal information exchange within teams and external knowledge acquisition across teams, which further contributes to employee creativity. Innovative culture can weaken the relationship between work-related ESM usage and internal team information exchange, and strengthen the relationship between social-related ESM usage and internal team information exchange. The findings suggest means of using enterprise social media for specific purposes to increase creativity and innovation in organizations. [ABSTRACT FROM AUTHOR]

An increasing number of employees are using social media for their daily work. But the relationship between social media use and job performance is controversial. To address this issue, this study explores the impact of different social media platform usage on job performance based on different usage purposes. The media synchronicity theory provides the theoretical foundation. Surveys were conducted in an Internet commerce company in China, generating 301 valid responses for analysis. The results showed that both work-related and social-related use of enterprise social media had a U-shape effect on job performance. Also, work-related use of general social media had a U-shape effect on job performance, whereas social-related use of general social media had no effect on job performance. These results offer insights about how organisations may guide their employees in their use of social media to improve job performance. [ABSTRACT FROM AUTHOR]

The present study aims to investigate the genetic stability of the plasmid expressing chicken interleukin-2 (ChIL-2) and chicken interleukin-4 (ChIL-4) fusion genes carried by the DH5α/pUC57 recombinant strain during the large-scale production process, and to explore its potential as an immune adjuvant for live chicken coccidiosis vaccine in commercial batch production. The laboratory genetic stability identification of the recombinant DH5α/pUC57 was carried out by subculturing the recombinant plasmid for 30 consecutive generations. The results showed that after the recombinant strain being cultured for 30 consecutive generations on the lysic broth (LB) plates containing ampicillin (Amp+), the recombinant bacterias remained Gram-negative (G-), and could ferment glucose and mannitol to result in specific phenomena, whereas none fermented lactose was found. The homology of the 16S rDNA fragments between the recombinant bacteria and E. coli was greater than 95%, the supercoil ratio of the recombinant plasmids of each generation was greater than 90%, and the plasmid loss rate was 0. The expression product of the recombinant plasmid could stimulate the differentiation of spleen lymphocytes of SPF chicks. The above results indicate that there were essentially no changes in the structure of the 30 generations of continuous passages for the ChIL-2-ChIL-4 fusion gene recombinant bacteria and recombinant plasmids, and the plasmids can be isolated stably, which can provide material support for the expansion of production. [ABSTRACT FROM AUTHOR]

In this study, core-shell Fe0@polyaniline (PANI) nanoparticles were synthesized to remove Rhodamine B (RhB) in aqueous solution. The Fe0/PANI composites were characterized by X-ray diffraction, Fourier transform infrared spectra, and transmission electron microscopy. The performances of Fe0/PANI on the activation of molecular oxygen for the removal of RhB were investigated, and the effects of operating parameters, such as Fe0/PANI dosage, RhB initial concentration, and pH value on RhB removal were also discussed. The results indicated that the Fe0@PANI/O2process exhibited significantly higher reactivity than did the Fe0/O2process for the degradation of RhB. The oxidative degradation of RhB was further promoted by the presence of anthraquinone-2-sulfonic acid sodium salt working as an electron shuttle. In addition, the reaction mechanism was discussed by measuring the concentrations of Fe(II), and total Fe formed in the system and examining scavenging effect by tert-butyl alcohol and copper chloride. The redox mediating function of PANI was also revealed by the UV–vis spectra. The stability of Fe0@PANI showed that it is a potential nanomaterial for the environmental remediation. [ABSTRACT FROM PUBLISHER]

In this study, the PANI-supported nanoscale zero-valent iron (PANI/nZVI) composites have been successfully synthesized to remove Rhodamine B (RhB) from aqueous solutions using a heterogeneous Fenton-like system. The synthetic PANI/nZVI composites were characterized using X-ray diffraction (XRD), Transmission electron microscope (TEM) and Fourier transform infrared (FTIR). The results showed that they were lamellar structures and nZVI nanoparticles were introduced into their structures. The performances of PANI/nZVI composites on the activation of molecular oxygen for removal of RhB were investigated and the effects of operating parameters, such as PANI/nZVI dosage, PANI and nZVI mass ratio, RhB initial concentration, and pH value on RhB removal were also discussed. The results indicate that PANI/nZVI was proved to be the most efficient in that more than 83.31% of RhB was removed, whereas only 11.15% when using nZVI after reacting for 120 min with an initial RhB concentration of 0.02 mmol L−1 (pH = 6.50). Furthermore, the reaction mechanism was discussed by measuring the concentrations of Fe(II), total Fe and H2O2 formed in the system and examining scavenging effects using copper chloride and methanol. Finally, the stability of PANI/nZVI nanocatalyst was studied. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 48-55, 2016 [ABSTRACT FROM AUTHOR]

Earlier research on the ways in which enterprise social media (ESM) usage contributes to employee resilience is rather limited. Using boundary spanning theory, this paper proposes a research model for investigating how enterprise social media usage contributes to employee resilience. Using Smart PLS 4.0 to analyze the survey data from 370 employees, this study found that, first, when enterprise social media is used for work and social purposes, it has a positive effect on employee boundary spanning, while the effect of social-related ESM usage on employee boundary spanning is larger than work-related ESM usage. Second, employee boundary spanning has the greatest effect on the behavioural dimension of employee-level resilience, followed by the cognitive dimension of employee-level resilience and the contextual dimension. Third, employees’ boundary spanning acts as a partial mediator between enterprise social media and employees’ different levels of resilience. Finally, it is interesting to find that individual adaptability can weaken the relationship between work-related ESM usage and employee boundary spanning, while individual adaptability can strengthen the relationship between social-related ESM usage and employee boundary spanning. The research findings suggest ways of using enterprise social media for specific purposes to increase employees’ different levels of resilience in organisations. [ABSTRACT FROM AUTHOR]

Highlights: [•] Hardfacing metal of the hypereutectic Fe–Cr–C alloy with different La2O3 additives was developed. [•] The dimension of the primary M7C3 carbide decreases with the increase of the La2O3 additives. [•] Austenite precipitated in the liquid phase can improve the precipitation rate of M7C3 carbide. [•] γ-Fe transforms into α-Fe can promote the growth of the M7C3 carbide in short period. [Copyright &y& Elsevier]

Highlights: [•] Polyhydroquinone was synthesized by oxidative polymerization of hydroquinone. [•] The degradation rate of RhB was enhanced in the presence of polyhydroquinone. [•] Polyhydroquinone serves as an electron shuttle to enhance the degradation rate. [ABSTRACT FROM AUTHOR]

Abstract: Arc surfacing layer of hypoeutectic high chromium cast iron (HCCI) expects refiner carbides in the microstructure to improve its mechanical properties. In this paper, Ti additive as a strong carbide forming element was added in the hypoeutectic HCCI arc surfacing layer. Microstructure of titaniferous hypoeutectic HCCI was studied by optical microscopy, X-ray diffraction and field emission scanning electronic microscopy with energy dispersive spectrometer. Furthermore, the M(M=Cr, Fe)7C3 carbide refinement mechanism was explained by the phase diagram calculation and lattice misfit theory. The results show that, the M7C3 carbide in arc surfacing microstructure of hypoeutectic HCCI has been refined with 2wt.% Ti additive, and TiC carbide can be observed in/around the M7C3 carbide. With Ti addictive increasing, the micro-hardness along the depth in profile section of layer becomes more uniform, and the wear resistance has been improved. According to the phase diagram calculation, MC carbide precipitates prior to M7C3 carbide in Fe–Cr–C–Ti alloy. In addition, the lattice misfit between (110)TiC and is 9.257%, which indicates that the TiC as heterogeneous nuclei of the M7C3 is medium effective. Therefore, the M7C3 carbide can be refined. [Copyright &y& Elsevier]