Late-mover advantages, innovation capability, and leapfrogging upgrading of low-carbon technology: evidence from Chinese enterprise groups.

This research examines the ability of Chinese enterprise groups to leapfrog the upgrading of low-carbon technologies. A theoretical model based on backwardness advantage, innovation theory, and technological leapfrogging theory is proposed to investigate the determinants of late-mover advantage and innovation capability in Chinese provinces. The study conducted interviews with 198 selected group managers from China's top 500 manufacturing enterprises and collected data from 248 related departments through questionnaires. The collected data was analyzed using the partial least square-structural equation model (PLS-SEM) to test the reliability and validity of the questionnaire and verify theoretical assumptions. Results show that late-mover advantage positively and significantly affects innovation capability, indicating that Chinese enterprise groups can utilize their late-mover advantage to innovate quickly and upgrade low-carbon technology. These findings have crucial implications for China's medium-term sustainable development trajectory.

Analysis of Staphyloxanthin Biosynthesis Using Single Cell Raman Spectroscopy / 分析化学

Laser tweezers Raman spectroscopy ( LTRS ) was used to study the inhibitory effect of indol on staphyloxanthin biosynthesis in Staphylococcus aureus cells and the dynamic changes of this pigment content inside bacterial cells during batch cultivation. The Raman spectra of Staphylococcus aureus cells cultivated for different time and exposed to various doses of indol were acquired. The intensity of 1523 cm-1 band was used for the quantification of staphyloxanthin, in the meantime, the pigment was measured by UV spectrometry. The experimental result showed that an excellent linear relationship existed between the intensities of Raman peak at 1523 cm-1 of bacterial cells and the pigment contents estimated by UV spectrometry, with a correlation coefficient of 0 . 9772 . The spectral data at population level as well as single cell level revealed that indol could inhibit the production of pigment in dose-dependent manner, and the pigment content in bacterial cells incubated with indol decreased by 70%. Under the batch growth condition, the pigment amount in Staphylococcus aureus cells reached the maximum value during the middle exponential growth phase ( 12 h ) and the heterogeneity of pigment content in bacterial cells within certain populations at various time points was relatively small, with RSDs of 39. 2% to 61. 1%. This investigation indicates that LTRS can be served as a reliable method for the analysis of staphyloxanthin content at single cell level.