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| 1 | Magnetic and thermosensitive luminescent nanocomposites based on Fe_3O_4/SiO_2/poly(N-isopropylacrylamide)/lanthanidepolyoxometalates and their controllable luminescence properties显示文摘Magnetic and temperature-responsive luminescent composites based on poly(N-isopropylacrylamide),magnetic nanoparticles and Na_9[EuW_(10)O_(36)] were fabricated. The composites were investigated by IR, UV,XRD, TGA, SEM and TEM. The prepared nanocomposites exhibit good superparamagnetic property and thermo-responsive switchable luminescence properties. The multifunctional nanocomposites can be separated by external magnetic field. Moreover, the nanocomposites exhibit an appreciable temperature response, and the red luminescence of the nanocomposites in solution can be controlled by the temperature stimuli. The hydrogel emits strong redluminescence in solution at 25 ℃,which can be seen by naked eyes. When the external temperature is 40 ℃, the red luminescence almost disappears in solution.It is expected that the multifunctional nanoparticles have potential applications in the field of biomedicine. | Jun Wang Si Chen Hao Liu Wuke Li | 2018 | Journal of Rare Earths2018，36，7： | 2 |
| 2 | Direct and indirect effects of solar variations on stratospheric ozone and temperature显示文摘We have used a fully coupled chemistry-climate model(WACCM)to investigate the relative importance of the direct and indirect effects of 11a solar variations on stratospheric temperature and ozone.Although the model does not contain a quasi-biennial oscillation(QBO)and uses fixed sea surface temperature(SST),it is able to produce a second maximum solar response in tropical lower stratospheric(TLS)temperature and ozone of approximately 0.5 K and 3%,respectively.In the TLS,the solar spectral variations in the chemistry scheme play a more important role than solar spectral variations in the radiation scheme in generating temperature and ozone responses.The chemistry effect of solar variations causes significant changes in the Brewer-Dobson(BD)circulation resulting in ozone anomalies in the TLS.The model simulations also show a negative feedback in the upper stratosphere between the temperature and ozone responses.A wavelet analysis of the modeled ozone and temperature time series reveals that the maximum solar responses in ozone and temperature caused by both chemical and radiative effects occur at different altitudes in the upper stratosphere.The analysis also confirms that both the direct radiative and indirect ozone feedback effects are important in generating a solar response in the upper stratospheric temperatures,although the solar spectral variations in the chemistry scheme give the largest solar cycle power in the upper stratospheric temperature. | SHANG Lin TIAN WenShou DHOMSE Sandip CHIPPERFIELD Martyn P LIU Yi WANG WuKe | 2013 | Chinese Science Bulletin2013，58，31： | 2 |
| 3 | Total flavonoids of Astragalus membranaceus protect against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced neurotoxicity in mice by inhibiting ferroptosis through SLC7A11/GPX-4 signaling pathway显示文摘Parkinson’s disease(PD)is a common neurodegenerative disorder with no cure.Astragalus membranaceus is used in Chinese culture as a food supplement to boost immunity.The present study aimed to explore the neuroprotective effects of total flavonoids extracted from A.membranaceus(TFA)and their protective mechanisms.TFA offered neuroprotection against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine(MPTP)in the mouse model of Parkinsonism,by improving behavior performance in the gait analysis and pole test,and inhibiting the decline of tyrosine hydroxylase(TH)positive neurons and TH protein expression in substantia nigra of mice.TFA also prevented 1-methyl-4-phenylpyridinium(MPP+)induced neurotoxicity in SHSY5Y cells,by increasing GSH and GSH/GSSG ratio,and reducing reactive oxygen species.In addition,the neuroprotective effects of TFA were associated with its ability to restore MPTP/MPP+induced downregulation of SLC7A11 and glutathione peroxidase 4(GPX-4).In conclusion,we demonstrated that TFA exerted significant neuroprotection against MPTP/MPP+induced neurodegeneration by inhibiting ferroptosis through the regulation of SLC7A11/GPX-4 axis,suggesting the use of TFA as a possible food supplement in the prevention of PD. | Zitian Gao Gaorui Wang Yujie Chen Wuke Yuan Jun Cai Aiping Feng Jie Fang Qi Xu Xiaojun Wu | 2024 | Food Science and Human Wellness2024，13，1： | 1 |
| 4 | ENSO and Southeast Asian biomass burning modulate subtropical trans-Pacific ozone transport显示文摘Trans-Pacific transport of enhanced ozone plumes has been mainly attributed to fossil fuel combustion in Asia in spring, but less attention has been paid to vegetation fires in Asia. Here we show that the El Ni?noSouthern Oscillation(ENSO)-modulated fires in Southeast Asia, rather than Asian fossil fuel plumes,dominate the interannual variability of springtime trans-Pacific transport of ozone across the entire North Pacific Ocean. During El Ni?no springs, the intensified fires from both the Indochinese Peninsula and Indonesia, together with large-scale circulation anomalies, result in enhanced ozone plumes that stretch over 15 000 km in both the lower-middle and upper troposphere. This enhancement is also observed in the in situ measurements of ozone concentration, with an almost 10% increase at Mauna Loa Observatory,Hawaii, a unique site to monitor the long-distance transport over the North Pacific. This study reports an unexpectedly strong influence of vegetation fires, linked with climate variability, on global tropospheric chemistry and proves once more how complex the interactions in the climate system are. | Lian Xue Aijun Ding Owen Cooper Xin Huang Wuke Wang Derong Zhou Zhaohua Wu Audra Mc Clure-Begley Irina Petropavlovskikh Meinrat O.Andreae Congbin Fu | 2021 | National Science Review2021，8，6： | 1 |
| 5 | Role of Stratospheric Processes in Climate Change: Advances and Challenges显示文摘In this review,instead of summarizing all the advances and progress achieved in stratospheric research,the main advances and new developments in stratosphere-troposphere coupling and stratospheric chemistry-climate interactions are summarized,and some outstanding issues and grand challenges are discussed.A consensus has been reached that the stratospheric state is an important source of improving the predictability of the troposphere on sub-seasonal to seasonal(S2S)time scales and beyond.However,applying stratospheric signals in operational S2S forecast models remains a challenge because of model deficiencies and the complexities of the underlying mechanisms of stratosphere-troposphere coupling.Stratospheric chemistry,which controls the magnitude and distribution of many important climate-forcing agents,plays a critical role in global climate change.Convincing evidence has been found that stratospheric ozone depletion and recovery have caused significant tropospheric climate changes,and more recent studies have revealed that stratospheric ozone variations can even exert an impact on SSTs and sea ice.The climatic impacts of stratospheric aerosols and water vapor are also important.Although their quantitative contributions to radiative forcing have been reasonably well quantified,there still exist large uncertainties in their long-term impacts on climate.The advances and new levels of understanding presented in this review suggest that whole-atmosphere interactions need to be considered in future for a better and more thorough understanding of stratosphere-troposphere coupling and its role in climate change. | Wenshou TIAN Jinlong HUANG Jiankai ZHANG Fei XIE Wuke WANG Yifeng PENG | 2023 | Advances in Atmospheric Sciences2023，40，8： | 0 |
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