RESUMO
When it comes to the environmental costs, environmental economists have tried to study the effects of the foreign direct investment-growth nexus, but they have ignored the crucial role that financial development and technical innovation play. Massive increases in energy consumption have contributed to environmental degradation in the BRICS nations, which have experienced rapid IND due to their robust economies. This study uses data from 1990 to 2021 to examine the relationship between carbon emissions in BRICS member nations and factors such as FDI, technological innovation, and economic growth. Within the panel nations, the results confirm a high cross-sectional reliance. The BRICS countries' financial development, technological innovation, and foreign direct investment all have a negative and statistically significant long-run association with CO2 emissions, according to the Augmented Mean Group (AMG) estimator. On the other hand, economic growth, TI, IND, and energy use all have positive and statistically significant associations with carbon emissions. This study's researchers choose to use the Dumitrescu and Hurlin panel causality test to look at the other way around. Economic growth (EG), Digital economic growth (DEG), Financial efficiency (FE), CO2 emissions (CO2), Industrialization (IND), Technological Innovation (TI), Foreign direct investment (FDI) and Inflation are all identified as having a bidirectional long-run causative relationship. In contrast, a unidirectional causal relationship is observed between FDI and CO2 emissions. To entice high-quality FDI, the BRICS member nations must advance their industries, financial institutions, and technological innovation. In addition, these nations need immediate legislative solutions because IND is a major cause of environmental damage.
RESUMO
Rhodiola capsules show the resistant effects on ischemia, anoxia, radiation, fatigue and virus and so on, and can im-prove the body immune function to relief the plateau symptoms such as fatigue and cerebral hypoxia. The influence mechanism of rhodi-ola capsules in the effect of anti-high altitude pulmonary edema was summarized in the paper.
RESUMO
Objective:To observe the effect of Jianpi Xiaozhang tablets on the bile secretion in rats. Methods: Totally 60 rats were divided into 6 groups randomly. Jianpi Xiaozhang tablet suspension(high, moderate, low dosages), Shudantong suspension, Qinggan Lidan capsule suspension and 0. 5% carboxymethyl cellulose with the same volume was respectively given with intragastric ga-vage once daily for continuous 5 days. The bile was collected to detect total bile acids ( TBA) , total cholesterol and total bilirubin. Re-sults:Jianpi Xiaozhang tablets could notably increase TBA and total bilirubin in the bile (P<0. 01), and decrease the cholesterol content significantly (P<0. 01). Conclusion:Jianpi Xiaozhang tablets can promote the bile secretion.
RESUMO
BACKGROUND:Both in vivo and vitro microenvironment can influence the proliferation and differentiation of neural stem cells (NSCs). In addition, cell culture solution plays variable roles in cell proliferation and differentiation.OBJECTIVE:To develop a convenient and rapid method to promote NSC primary culture by modifying traditional serum-free medium. DESIGN, TIME AND SETTING:Randomized controlled cell trial was performed at Institute of Brain Science, Qingdao University Medical School from November 2005 to September 2006.MATERIALS:Ten Wistar rat of gestation for 12-16 days; cell suspension fron brain tissue of embryonic rat. METHODS:Cell suspension were seeded into four 50-mL culture flasks with cell density of 1×106 mL-1, and divided into 2 groups with 2 flasks in each group. The control cells (flasks A and B) were cultured in serum-free medium containing DMEM/F12, B27 (2%), basic fibroblast growth factor (20 μg/L), and epidermal growth factor (20μg/L), and the experimental cells (flasks C and D) were firstly cultured with DMEM/F12 containing fetal bovine serum (FBS, 5%), following by the same serum-free medium 2 to 3 days later. MAIN OUTCOME MEASURES:The proliferation of NSCs was observed by inverted microscopy and immunocytochemistry.RESULTS:①Most of the cells in two culture conditions expressed nestin, the specific marker of NSCs, and were immunocytochemically positive. ②Neural stem cells cultured with FBS formed neurospheres 3-4 days earlier than those without FBS. ③There were no significant differences in cell number, but the neurospheres under the experimental condition were larger than those in control group. Some of the cells were neurone specific enolase-positive after serum-conditioned induction, and some were glial fibrillary acidic protein-positive, indicating NSCs had differentiated into neuron-like cells and neurogliocytes.CONCLUSION:FBS-conditioned pre-culture can accelerate the proliferation of neural stem cells.
