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| 1 | Cloud point extraction and flame atomic absorption spectrometry analysis of palladium, platinum, and gold ions from industrial polluted soil显示文摘Cloud point extraction (CPE) with Tergitol TMN-6 was applied for the extraction of trace amounts of palladium (Pd(Ⅱ)), platinum (Pt(Ⅳ)), and gold (Au(Ⅲ)) in the soil of industrial sewage. Ammonium pyrolysine dithiocarbamate (APDC) was adopted as the chelating agent prior to CPE and then was detected by atomic absorption spectrometry (AAS). Different parameters such as the concentration of surfactants, chelating agent and salt, sample pH, equilibration temperature and time, centrifugation time and rates, and the effect of foreign ions were studied. Under optimum conditions, the low limits of detections are 1.4, 2.8 and 1.2 ng·ml^-1 and the enrichment factors are 21, 12, and 24 for Pd(Ⅱ), Pt(Ⅳ), and Au(Ⅲ, respectively. The relative standard deviations vary from 0.6% to 1.0% (n=11). All correlation coefficients of the calibration curves are >0.9960. The proposed method was successfully applied for the determination of Pd(Ⅱ), Pt(Ⅳ), and Au(Ⅲ) in the real soil of industrial sewage samples. | LIAN Yuanpei ZHEN Wei TAI Zhigang YANG Yaling SONG Jun LI Zonghao | 2012 | Rare Metals2012，31，5： | 5 |
| 2 | Facile synthesis of nanoceria by a molten hydroxide method and its photocatalytic properties显示文摘Ceria nanoparticles were facilely synthesized by a molten NaOH-KOH hydroxide flux method with the precursor of Ce(NO3)3·6H2O under different conditions in alumina crucibles or Teflon-lined stainless steel autoclave.The XRD patterns and TEM images show that both the crystal and particle sizes of synthesized nanoceria are around 10 nm.XPS results reveal that the nanoceria obtained in alumina crucible has a Ce3+fraction of 17.1%which is higher than that of ceria synthesized in the Teflon vessel,the FTIR spectra of nanoceria prepared in alumina crucible show a stronger intensity of O-H stretching mode.UV-DRS and PL spectra results show that the nanoceria synthesized in alumina crucible with a calculated band gap of 2.9 eV has a wider responding light wavelength and a lower photogene rated electron-hole recombination rate,due to a higher concentration of oxygen vacancies(Ce^3+%).The photocatalytic results show that the degradation ratio and rate of the Rhodamine B(RhB)solution with the nanoceria synthesized in alumina crucible are 98.39%and 0.02919 min-1,both of which are larger than those of the ceria obtained from Teflon vessel.This method proves to be a simple and scalable way to synthesize nanoceria with rich oxygen vacancies and high photocatalytic activity. | Xuewen Xia Yuanpei Lan Junqi Li Chaoyi Chen Benjun Xu Xian Luo Xisong Mao | 2020 | Journal of Rare Earths2020，38，9： | 4 |
| 3 | Light-triggered nitric oxide release and structure transformation of peptide for enhanced intratumoral retention and sensitized photodynamic therapy显示文摘Tumor-targeted delivery of nanomedicine is of great importance to improve therapeutic efficacy of cancer and minimize systemic side effects.Unfortunately,nowadays the targeting efficiency of nanomedicine toward tumor is still quite limited and far from clinical requirements.In this work,we develop an innovative peptide-based nanoparticle to realize light-triggered nitric oxide(NO)release and structural transformation for enhanced intratumoral retention and simultaneously sensitizing photodynamic therapy(PDT).The designed nanoparticle is self-assembled from a chimeric peptide monomer,TPP-RRRKLVFFK-Ce6,which contains a photosensitive moiety(chlorin e6,Ce6),aβ-sheet-forming peptide domain(Lys-Leu-Val-Phe-Phe,KLVFF),an oligoarginine domain(RRR)as NO donor and a triphenylphosphonium(TPP)moiety for targeting mitochondria.When irradiated by light,the constructed nanoparticles undergo rapid structural transformation from nanosphere to nanorod,enabling to achieve a significantly higher intratumoral accumulation by 3.26 times compared to that without light irradiation.More importantly,the conversion of generated NO and reactive oxygen species(ROS)in a light-responsive way to peroxynitrite anions(ONOO)with higher cytotoxicity enables NO to sensitize PDT in cancer treatment.Both in vitro and in vivo studies demonstrate that NO sensitized PDT based on the well-designed transformable nanoparticles enables to eradicate tumors efficiently.The light-triggered transformable nanoplatform developed in this work provides a new strategy for enhanced intratumoral retention and improved therapeutic outcome. | Lingdong Jiang Danyang Chen Zhaokui Jin Chao Xia Qingqing Xu Mingjian Fan Yunlu Dai Jia Liu Yuanpei Li Qianjun He | 2022 | Bioactive Materials2022，7，6： | 3 |
| 4 | Experimental measurement of growth patterns on fossil corals:Secular variation in ancient Earth-Sun distances显示文摘In recent years,much attention has been given to the increase in the Earth-Sun distance,with the modern rate reported as 5-15 m/cy on the basis of astronomical measurements.However,traditional methods cannot measure the ancient leaving rates,so a myriad of research attempting to provide explanations were met with unmatched magnitudes.In this paper we consider that the growth patterns on fossils could reflect the ancient Earth-Sun relationships.Through mechanical analysis of both the Earth-Sun and Earth-Moon systems,these patterns confirmed an increase in the Earth-Sun distance.With a large number of well-preserved specimens and new technology available,both the modern and ancient leaving rates could be measured with high precision,and it was found that the Earth has been leaving the Sun over the past 0.53 billion years.The Earth's semi-major axis was 146 million kilometers at the beginning of the Phanerozoic Eon,equating to 97.6% of its current value.Measured modern leaving rates are 5-14 m/cy,whereas the ancient rates were much higher.Experimental results indicate a special expansion with an average expansion coefficient of 0.57H0 and deceleration in the form of Hubble drag.On the basis of experimental results,the Earth's semi-major axis could be represented by a simple formula that matches fossil measurements. | ZHANG WeiJia1,3,4,LI ZhengBin2,3 & LEI Yang1 1 Department of Physics,Peking University,Beijing 100871,China 2 Department of Electrical Engineering and Computer Science,Peking University,Beijing 100871,China 3 State Key Laboratory of Advanced Optical Communication Systems & Networks,Peking University,Beijing 100871,China 4 Committee of Yuanpei Honors Program,Peking University,Beijing 100871,China | 2010 | Chinese Science Bulletin2010，55，35： | 3 |
| 5 | BER minimized OFDM systems with channel independent precoders显示文摘 | LIN Yuanpei PHOONG S M | 2003 | IEEE Transactions on Signal Processing2003，51，9： | 1 |
| 6 | Flow behavior and microstructure evolution of TB8 alloy during hot deformation process 显示文摘 | Duan Yuanpei Li Ping | 2007 | Trans Nonferrous Met Soc China2007，17，： | 1 |
| 7 | Zearalenone toxicosis on reproduction as estrogen receptor selective modulator and alleviation of zearalenone biodegradative agent in pregnant sows显示文摘Background:Zearalenone(ZEA)is a resorcylic acid lactone derivative derived from various Fusarium species that are widely found in food and feeds.The molecular structure of ZEA resembles that of the mammalian hormone 17β-oestradiol,thus zearalenone and its metabolites are known to compete with endogenous hormones for estrogen receptors binding sites and to activate transcription of oestrogen-responsive genes.However,the effect of long-term low-dose ZEA exposure on the reproductive response to Bacillus subtilis ANSB01G culture for first-parity gilts has not yet been investigated.This study was conducted to investigate the toxic effects of ZEA as an estrogen receptor selective modulator and the alleviating effects of Bacillus subtilis ANSB01G cultures as ZEA biodegraders in pregnant sows during their first parity.Results:A total of 80 first-parity gilts(Yorkshire×Landrace)were randomly assigned to four dietary treatments during gestation:CO(positive control);MO(negative control,246μg ZEA/kg diet);COA(CO+B.subtilis ANSB01G culture with 2×10^(9)CFU/kg diet);MOA(MO+B.subtilis ANSB01G culture with 2×10^(9)CFU/kg diet).There were 20 replications per treatment with one gilt per replicate.Feeding low-dose ZEA naturally contaminated diets disordered most of reproductive hormones secretion and affected estrogen receptor-αand estrogen receptor-βconcentrations in serum and specific organs and led to moderate histopathological changes of gilts,but did not cause significant detrimental effects on reproductive performance.The addition of Bacillus subtilis ANSB01G culture to the diet can effectively relieve the competence of ZEA to estrogen receptor and the disturbance of reproductive hormones secretion,and then ameliorate toxicosis of ZEA in gilts.Conclusions:Collectively,our study investigated the effects of feeding low-dose ZEA on reproduction in pregnant sows during their first parity.Feeding low-dose ZEA could modulate estrogen receptor-αand-βconcentrations in specific organs,cause disturbance of reproductive hormones and vulva swelling,and damage organ histopathology and up-regulate apoptosis in sow models.Diet with Bacillus subtilis ANSB01G alleviated negative effects of the ZEA on gilts to some extent. | Jianchuan Zhou Lihong Zhao Shimeng Huang Qingxiu Liu Xiang Ao Yuanpei Lei Cheng Ji Qiugang Ma | 2022 | Journal of Animal Science and Biotechnology2022，13，4： | 1 |
| 8 | Spatial Prediction of Soil Salinity in a Semiarid Oasis: Environmental Sensitive Variable Selection and Model Comparison显示文摘Timely monitoring and early warning of soil salinity are crucial for saline soil management. Environmental variables are commonly used to build soil salinity prediction model. However, few researches have been done to summarize the environmental sensitive variables for soil electrical conductivity(EC) estimation systematically. Additionally, the performance of Multiple Linear Regression(MLR), Geographically Weighted Regression(GWR), and Random Forest regression(RFR) model, the representative of current main methods for soil EC prediction, has not been explored. Taking the north of Yinchuan plain irrigation oasis as the study area, the feasibility and potential of 64 environmental variables, extracted from the Landsat 8 remote sensed images in dry season and wet season, the digital elevation model, and other data, were assessed through the correlation analysis and the performance of MLR, GWR, and RFR model on soil salinity estimation was compared. The results showed that: 1) 10 of 15 imagery texture and spectral band reflectivity environmental variables extracted from Landsat 8 image in dry season were significantly correlated with soil EC, while only 3 of these indices extracted from Landsat 8 image in wet season have significant correlation with soil EC. Channel network base level, one of the terrain attributes, had the largest absolute correlation coefficient of 0.47 and all spatial location factors had significant correlation with soil EC. 2) Prediction accuracy of RFR model was slightly higher than that of the GWR model, while MLR model produced the largest error. 3) In general, the soil salinization level in the study area gradually increased from south to north. In conclusion, the remote sensed imagery scanned in dry season was more suitable for soil EC estimation, and topographic factors and spatial location also play a key role. This study can contribute to the research on model construction and variables selection for soil salinity estimation in arid and semiarid regions. | LI Zhen LI Yong XING An ZHUO Zhiqing ZHANG Shiwen ZHANG Yuanpei HUANG Yuanfang | 2019 | Chinese Geographical Science2019，29，5： | 1 |
| 9 | 显示文摘 | Yu Jie Yang Gege Pan Yuanpei | 2014 | Plasma Science and Technology2014，16，8： | 1 |
| 10 | Porosity change medel for watered super absorbent polymers-treated soil显示文摘 | Yuguo Han Peiling Yang Yuanpei Luo | 2010 | Environ- mental Earth Sciences2010，61，： | 1 |
| 11 | Flow behavior and microstructure evolution of TB8 alloy during hot de- formation process显示文摘 | Duan Yuanpei Li Ping Xue Kemin | 2007 | Trans Nonferrous Metals Soc China2007，17，6： | 1 |
| 12 | Porosity change model for watered super absorbent polymer-treated soil显示文摘 | HAN Yuguo YANG Peiling LUO Yuanpei | 2010 | Environmental Earth Sciences2010，61，6： | 1 |
| 13 | Well-defined, reversible boronate crosslinked nanocarriers for targeted drug delivery in response to acidic pH values and cis-diols 显示文摘 | Li Yuanpei Xiao Wenwu Xiao Kai | 2012 | Angew Chem Int Ed Engl2012，51，12： | 1 |
| 14 | Porosity change model for watered super absorbent polymer-treated soil 显示文摘 | Han Yuguo Yang Peiling Luo Yuanpei | | Environmental Earth Sciences0，61，6： | 1 |
| 15 | Porosity change model for watered super absorbent polymer- treated soil显示文摘 | Hart Yuguo Yang Peiling Luo Yuanpei | 2010 | Environmental Earth Sciences2010，61，6： | 1 |
| 16 | Porosity change model for watered super absorbent polymer-treated soil显示文摘 | HAN Yuguo YANG Peiling LUO Yuanpei | 2010 | Environmental Earth Sciences2010，61，6： | 1 |
| 17 | Probing of the assembly structure and dynamics within nanoparticles during interaction with blood proteins 显示文摘 | Li Yuanpei Budamagunta M S Luo J untao | 2012 | Acs Nano2012，6，11： | 1 |
| 18 | Modeling Nitrate Leaching and Optimizing Water and Nitrogen Management under Irrigated Maize in Desert Oases in Northwestern China显示文摘 | Hu Kelin Li Yong Chen Weiping Chen Deli Wei Yongping Edis Robert Li Baoguo Huang Yuanfang Zhang Yuanpei | 2010 | Journal of Environmental Quality2010，，2： | 1 |
| 19 | Periodically nonuniform sampling of bandpass signals显示文摘 | Lin Yuanpei Vaidyanathan P P | 1998 | IEEE Transactions on Circuits and Systems1998，45，3： | 1 |
| 20 | Path Exploration and Practice of Sponge City Construction in the Pearl River Delta:A Case Study of Dalang Town,Dongguan City显示文摘In order to deal with global climate warming and practice the construction of national ecological civilization,a sponge city has become an important national plan for regional comprehensive management and development because it can systematically solve the issues of regional water resources,water security,water environment and water ecology,and provide a comprehensive plan of sustainable development for regional water control,storage and use.Sponge city construction has been carried out across the country.In this paper,taking Dalang Town as an example,and combining its local climate,geological geomorphology,hydrological conditions,current situation and future planning of urban space,management system and other characteristics,the connotation,construction strategy and objectives,index decomposition and other key contents of sponge city were discussed,and the methods of sponge city construction in the builtup area with high rainfall,abundant groundwater and high density were studied to provide reference for formulating solutions and schemes for Dalang Town and developing sponge city construction in the Pearl River Delta. | FENG Jun CHEN Yuanpei LIU Bei WEI Jiankun | 2023 | Journal of Landscape Research2023，15，1： | 1 |
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