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| 1 | Construction of upconversion fluoride/attapulgite nanocomposite for visible-light-driven photocatalytic nitrogen fixation显示文摘Developing photocatalysts with wide spectrum absorption and strong nitrogen activation is critical for nitrogen fixation under mild conditions.Herein,one-dimensional natural clay attapulgite(ATP)supported YFg:Sm^3+were successfully synthesized via microwave hydrothermal method,and the composites were employed as the catalyst for photocatalytic nitrogen fixation under visible-light irradiation.Results indicated that the production of ammonia reached as high as 41.2 mg·L^-1 within 3 h when the molar ratio of Sm^3+and the mass fraction of YF3:Sm^3+were optimized.The enhanced fixation performance is mainly due to that the modified ATP fibber with abundant active sites and the doped fluoride with defective vacancy facilitate the adsorption and activation of N2.Furthermore,the upconversion property of YF3:Sm^3+increases the harvesting of visible-light energy,meanwhile the Z-scheme heterostructure built between YF:Sm^3+and modified ATP inhibits the recombination of charge carriers and retains high redox potentials for N2 reduction. | Xuhua YE Xiangyu YAN Xini CHU Shixiang ZUO Wenjie LIU Xiazhang LI Chao YAO | 2020 | Frontiers of Materials Science2020，14，4： | 0 |
| 2 | Linguistic Characteristics of Mandarin-Speaking Huntington’s Disease Patients显示文摘Objective Linguistic problem is common in Huntington’s disease(HD)patients.It has been studied before in native speakers of alphabetic languages,such as English.As a hieroglyphic language,Chinese differs from alphabetic languages in terms of phonology,morphology,semantics and syntax.We aimed to investigate the linguistic characteristics of manifest HD in native speakers of Mandarin.Meanwhile,we expected to explore the linguistic differences associated with cortical or subcortical pathology.Methods Five HD patients and five Alzheimer’s disease(AD)patients matched in age,gender,disease course and educational level were enrolled.All the participants were Mandarin native speakers.All finished history inquiry,physical examination,basic test,genetic test and neuropsychological assessment.Language evaluation was performed by Aphasia Battery of Chinese.Results HD patients had a mean disease course of 5.4±2.97(range,2-10)years.They showed a linguistic disorder close to transcortical motor aphasia.They exhibited prominent phonological impairment,as well as slight semantic and syntactic abnormality.Tonic errors were found in speech.Character structural errors and substitutions were detected in writing.In comparison,AD patients showed a more severe linguistic impairment,characterized by global aphasia with more semantic errors.Conclusion Mandarin-speaking HD patients have a transcortical motor aphasia-like disturbance with prominent phonological impairment,whereas AD patients have a more severe global aphasia with salient semantic impairment. | Liling Dong Caiyan Liu Chenhui Mao Shanshan Chu Jie Li Xinying Huang Jing Gao | 2020 | Chinese Medical Sciences Journal2020，35，3： | 0 |
| 3 | Improving Gravity Anomalies Over China Marginal Sea from Retracked Geosat and ERS-1 Data显示文摘The quality of altimeter data and ocean tide model is critical to the recovery of coastal gravity anomalies. In this contribution, three retracking methods (threshold, improved threshold and Beta-5) are investigated with the aim of improving the altimeter data over a shallow water area. Comparison indicates that the improved threshold is the best retracking method over China Sea. Two ocean tide models, NAO99b and CSR4.0, are analyzed. Results show that different tide models used in the processing of altimeter data may result in differences more than 10 mGal in recovered coastal gravity anomalies. Also, NAO99b is more suitable than CSR4.0 over the shallow water area of China Sea. Finally, gravity anomalies over China Sea are calculated from retracked Geosat/GM and ERS-1/GM data by least squares collocation. Comparison with shipborne gravimetry data demonstrates that gravity anomalies from retracked data are significantly superior to those from non-retracked data. Our results have the same order as the other two altimeter-derived gravity models: Sandwell&Smith(V16) and DNSC08. | WANG Haihong YANG Yuande HWANG Chenway CHU Yonghai MA Xinying | 2010 | Geo-Spatial Information Science2010，13，2： | 0 |
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