48 results on '"Dou Ma"'
Search Results
2. Detecting Moral Emotions with Facial and Vocal Expressions: A Multimodal Emotion Recognition Approach.
- Author
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Ivan Liu, Songjie Li, Dou Ma, Jian Luan 0003, Xinzhuo Wu, Fangyuan Liu, Yang Shen, and Shiguang Ni
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- 2024
- Full Text
- View/download PDF
3. Prevalence and genetic diversity of Echinorhynchus gymnocyprii (Acanthocephala: Echinorhynchidae) in schizothoracine fishes (Cyprinidae: Schizothoracinae) in Qinghai-Tibetan Plateau, China
- Author
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Meng-Tong Lei, Jin-Zhong Cai, Chun-Hua Li, Yong Fu, Jian Sun, Dou-Dou Ma, Yao-Peng Li, and Yan-Ming Zhang
- Subjects
Echinorhynchus gymnocyprii ,Schizothoracine fishes ,Molecular characterization ,Molecular phylogeny ,Qinghai-Tibetan Plateau ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Background The schizothoracine fishes, an excellent model for several studies, is a dominant fish group of the Qinghai-Tibet Plateau (QTP). However, species populations have rapidly declined due to various factors, and infection with Echinorhynchus gymnocyprii is cited as a possible factor. In the present study, the molecular characteristics of E. gymnocyprii in four species of schizothoracine fishes from the QTP were explored. Methods We investigated the infection status of E. gymnocyprii in 156 schizothoracine fishes from the upper Yangtze River, upper Yellow River, and Qinghai Lake in Qinghai Province, China. The complete internal transcribed spacer (ITS) of the ribosomal RNA (rRNA) gene and part of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene of 35 E. gymnocyprii isolates from these fishes were sequenced and their characteristics analyzed. In addition, we inferred phylogenetic relationships of the E. gymnocyprii populations based on the rRNA-ITS and cox1 sequences. Results The total prevalence of E. gymnocyprii in schizothoracine fishes was 57.69% (90/156). However, the prevalence among different species as well as that across the geographical locations of the schizothoracine fishes was significantly different. The results of sequence analysis showed that the four E. gymnocyprii populations from different hosts and regions of Qinghai Province were conspecific, exhibiting rich genetic diversity. Phylogenetic analysis based on rRNA-ITS and cox1 sequences supported the coalescence of branches within E. gymnocyprii; the cox1 gene of E. gymnocyprii populations inferred some geographical associations with water systems. In addition, three species of schizothoracine fishes were recorded as new definitive hosts for E. gymnocyprii. Conclusions To the best of our knowledge, this is the first molecular description of E. gymnocyprii populations in schizothoracine fishes from the Qinghai-Tibet Plateau that provides basic data for epidemiological surveillance and control of acanthocephaliasis to protect endemic fish stocks.
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- 2020
- Full Text
- View/download PDF
4. Metal-organic frameworks: Synthetic methods for industrial production
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Dou Ma, Xin Huang, Yu Zhang, Lu Wang, and Bo Wang
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General Materials Science ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics - Published
- 2023
5. Molecular Exclusion Separation of 1‐Butene Isomers by a Robust Metal–Organic Framework under Humid Conditions
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Xin Huang, Shuyi Jiang, Dou Ma, Jing Xie, Xiao Feng, and Bo Wang
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General Medicine ,General Chemistry ,Catalysis - Published
- 2023
6. Frontispiz: 2D Covalent Organic Framework for Water Harvesting with Fast Kinetics and Low Regeneration Temperature
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Chao Sun, Yuhao Zhu, Pengpeng Shao, Liwei Chen, Xin Huang, Shuang Zhao, Dou Ma, Xuechun Jing, Bo Wang, and Xiao Feng
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General Medicine - Published
- 2023
7. 2D Covalent Organic Framework for Water Harvesting with Fast Kinetics and Low Regeneration Temperature
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Chao Sun, Yuhao Zhu, Pengpeng Shao, Liwei Chen, Xin Huang, Shuang Zhao, Dou Ma, Xuechun Jing, Bo Wang, and Xiao Feng
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General Medicine ,General Chemistry ,Catalysis - Published
- 2023
8. Sealing functional ionic liquids in conjugated microporous polymer membrane by solvent-assisted micropore tightening
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Pengpeng Shao, Xiao Feng, Mengxi Zhang, Xiangyu Wu, Xin Huang, Xianghao Han, Jing Xie, Bo Wang, Dou Ma, and Anke Yu
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chemistry.chemical_classification ,Materials science ,Microporous material ,Polymer ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Separation process ,Membrane technology ,Conjugated microporous polymer ,chemistry.chemical_compound ,Membrane ,Chemical engineering ,chemistry ,Leaching (chemistry) ,Ionic liquid ,General Materials Science ,Electrical and Electronic Engineering - Abstract
Porous organic polymers hold great promise for molecular sieving membrane separation. Although the inclusion of functional ionic liquid (IL) in the pores offers a facile way to manipulate their separation properties, the IL leaching during the separation process is difficult to avoid. Herein, we report a strategy to in-situ encapsulate ILs into the micropores of the conjugated microporous polymer membrane via a 6-min electropolymerization and further seal the aperture of the pores to prevent ILs leaching by solvent-assisted micropore tightening (SAMT). Upon screening the binding energy between different ILs and gas molecules, two ILs were selected to be incorporated into the membrane for CO2/CH4 and O2/N2 gas separations. The resultant separation performances surpass the 2008 Robeson upper bound. Notably, the ILs can be locked in the micropores by a facile high surface tension solvent treatment process to improve their separation stability, as evidenced by a 7-day continuous test. This simple and controllable process not only enables efficient and steady separation performance but also provides an effective strategy for confining and sealing functional guest molecules in the porous solids for various applications.
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- 2021
9. Metal–Organic Framework-Derived Trimetallic Nanocomposites as Efficient Bifunctional Oxygen Catalysts for Zinc–Air Batteries
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Xiao Feng, Xiaorui Wang, Lu Wang, Jinwei Zhang, Dou Ma, and Bo Wang
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chemistry.chemical_compound ,Materials science ,Nanocomposite ,Chemical engineering ,chemistry ,Transition metal ,Oxygen evolution ,General Materials Science ,Metal-organic framework ,Methanol ,Electrochemistry ,Bifunctional ,Catalysis - Abstract
Transition-metal-based multifunctional catalysts have attracted increasing attention owing to high possibilities of substituting the expensive noble-metal-based catalysts in various scenarios. Multivariate metal-organic frameworks (MTV-MOFs) are ideal precursors to prepare multimetallic nanocomposites with high catalytic activity since the uniform distribution and precise regulation of mixed metal centers, as well as the consequent strong synergistic effect, could be readily achieved. Herein, a Mn/Co/Ni trimetallic catalyst (MnCoNi-C-D) with a hollow rhombic dodecahedron shape was synthesized via pyrolysis of the corresponding trimetallic-based MTV-MOF. The catalyst shows outstanding electrochemical activity toward the oxygen reduction reaction including a half-wave potential of 0.82 V and superior tolerance against methanol as well as high stability in an alkaline medium, and its oxygen evolution reaction activity also surpasses a RuO2 catalyst. Moreover, primary and rechargeable zinc-air batteries based on MnCoNi-C-D delivered preferable performances compared with commercial Pt/C-RuO2, including higher peak power density (116.4 mW cm-2), higher specific capacity (841.3 mAh g-1), higher open-circuit potential (OCV) (1.46 V), and better stability for more than 180 h. A comprehensive comparison was also conducted to prove the necessity of employing the MTV-MOF as the precursor and investigate the intrinsic superiority of the catalyst.
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- 2021
10. Speed regulation system based on proportional resonance self-coupling PI control
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GUAN Wenqing, CHENG Yi, DOU Manfeng, and CHAO Shiyuan
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permanent magnet synchronous motor ,proportional resonance self-coupling pi control ,nonlinear control ,harmonic suppression ,Motor vehicles. Aeronautics. Astronautics ,TL1-4050 - Abstract
In this paper, an improved self-coupled PI control dual-loop control strategy is proposed for the vector control of permanent magnet synchronous electric speed control system, to improve the poor motor control effect caused by the dead zone of the inverter, the presence of harmonics in the motor magnetic field distribution, and the error in the sampling process of the current. In order to reduce the tracking error of the signal, an acceleration feed-forward method is adopted, and the self-coupled PI controller with an additional Levant differentiator is introduced into the speed loop of the permanent magnet synchronous motor to ensure the accurate derivation of the input signal containing noise to improve the robustness of the system. In addition, this strategy combines the proportional term of the autotuned PI control structure with the standard resonator to form a proportional resonant autotuned PI in the current loop, so that the permanent magnet synchronous motor can better compensate the current in the current loop control to achieve the effect of current harmonic suppression. Finally, the control mechanism of the servo system analyzed, and based on the mathematical model of the controlled object PMSM, the design method of the improved self-coupling PI control structure is given. The experimental results show that the proposed control strategy can reduce the impact of the motor's own parameter changes on the system performance and has a good current harmonic suppression in the low-speed domain, which verifies the effectiveness of the designed improved self-coupled PI controller.
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- 2024
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11. Maternal dietary patterns during pregnancy and birth weight: a prospective cohort study
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Tongtong Li, Yusa He, Nan Wang, Chengwu Feng, Puchen Zhou, Ye Qi, Zhengyuan Wang, Xiaojun Lin, Dou Mao, Zhuo Sun, Aili Sheng, Yang Su, Liping Shen, Fengchang Li, Xueying Cui, Changzheng Yuan, Liang Wang, Jiajie Zang, and Geng Zong
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Plant-based dietary pattern ,Macrosomia ,Birth weight ,Chinese ,Nutrition. Foods and food supply ,TX341-641 ,Nutritional diseases. Deficiency diseases ,RC620-627 - Abstract
Abstract Background Existing data on maternal dietary patterns and birth weight remains limited and inconsistent, especially in non-Western populations. We aimed to examine the relationship between maternal dietary patterns and birth weight among a cohort of Chinese. Methods In this study, 4,184 mother-child pairs were included from the Iodine Status in Pregnancy and Offspring Health Cohort. Maternal diet during pregnancy was evaluated using a self-administered food frequency questionnaire with 69 food items. Principal component analysis was used to identify dietary patterns. Information on birth weight and gestational age was obtained through medical records. Adverse outcomes of birth weight were defined according to standard clinical cutoffs, including low birth weight, macrosomia, small for gestational age, and large for gestational age. Results Three maternal dietary patterns were identified: plant-based, animal-based, and processed food and beverage dietary patterns, which explained 23.7% variance in the diet. In the multivariate-adjusted model, women with higher adherence to the plant-based dietary patten had a significantly higher risk of macrosomia (middle tertile vs. low tertile: odds ratio (OR) 1.45, 95% CI 1.00-2.10; high tertile vs. low tertile: OR 1.55, 95% CI 1.03–2.34; P-trend = 0.039). For individual food groups, potato intake showed positive association with macrosomia (high tertile vs. low tertile: OR 1.72, 95% CI 1.20–2.47; P-trend = 0.002). Excluding potatoes from the plant-based dietary pattern attenuated its association with macrosomia risk. No significant associations was observed for the animal-based or processed food and beverage dietary pattern with birth weight outcomes. Conclusions Adherence to a plant-based diet high in carbohydrate intake was associated with higher macrosomia risk among Chinese women. Future studies are required to replicate these findings and explore the potential mechanisms involved.
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- 2024
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12. Tumor-Activated and Metal–Organic Framework Assisted Self-Assembly of Organic Photosensitizers
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Wenbo Wu, Majid Panahandeh-Fard, Bo Wang, Bin Liu, Yuanbo Wang, Leilei Shi, Shidang Xu, Xinyuan Zhu, Dou Ma, and Li Xu
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medicine.medical_treatment ,General Physics and Astronomy ,Photodynamic therapy ,02 engineering and technology ,010402 general chemistry ,Photochemistry ,01 natural sciences ,chemistry.chemical_compound ,In vivo ,Neoplasms ,medicine ,Humans ,General Materials Science ,Metal-Organic Frameworks ,Photosensitizing Agents ,Singlet Oxygen ,Singlet oxygen ,General Engineering ,Light irradiation ,021001 nanoscience & nanotechnology ,Tumor site ,0104 chemical sciences ,Photochemotherapy ,chemistry ,Metal-organic framework ,Self-assembly ,0210 nano-technology ,Zeolitic imidazolate framework - Abstract
Tumor accumulation and intratumoral singlet oxygen (1O2) generation efficiency of photosensitizers (PSs) are two essential factors that determine their photodynamic therapy (PDT) efficacies. How to maximize the PS performance at the tumor site is of great research interest. Herein, we report a metal-organic framework (ZIF-8, ZIF = zeolitic imidazolate framework) assisted in vivo self-assembly nanoplatform, ZIF-8-PMMA-S-S-mPEG, as an effective tool for organic PS payloads to achieve efficient PDT. Using an organic PS with aggregation-induced emission as an example, under intratumoral bioreduction, PS-loaded ZIF-8-PMMA-S-S-mPEG (PS@ZIF-8-PMMA-S-S-mPEG) was self-assembled into large ordered hydrophobic clusters, which greatly enhance tumor retention and accumulation of the PS. Moreover, hydrophobic ZIF-8 assemblies greatly isolate the loaded PSs from water and improve O2 transport for the PSs to effectively produce 1O2 inside tumors under light irradiation. The organic PS is therefore endowed with optimal tumor accumulation and intratumoral 1O2 production, demonstrating the effectiveness of the developed self-assembly strategy in PDT application.
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- 2020
13. Membrane adsorbers with ultrahigh metal-organic framework loading for high flux separations
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Dou Ma, Xiaoqi Wang, Xiao Feng, Hang Wang, Mingchu Zou, Anyuan Cao, Yi Liu, Yuhua Cao, Shuang Zhao, Bo Wang, and Ruxin Yao
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Materials science ,Surface Properties ,Science ,General Physics and Astronomy ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Article ,General Biochemistry, Genetics and Molecular Biology ,chemistry.chemical_compound ,Adsorption ,Porosity ,lcsh:Science ,Multidisciplinary ,Proteins ,Membranes, Artificial ,General Chemistry ,Metal-organic frameworks ,Polyethylene ,Permeation ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Membrane ,chemistry ,Chemical engineering ,Permeability (electromagnetism) ,Metal-organic framework ,lcsh:Q ,0210 nano-technology ,Selectivity - Abstract
Metal-organic frameworks (MOFs) with high porosity and designable functionality make it possible to access the merits of high permeability and selectivity. However, scalable fabrication methods to produce mixed matrix membranes (MMMs) with good flexibility and ultrahigh MOF loading are urgently needed yet largely unmet. Herein, we report a thermally induced phase separation-hot pressing (TIPS-HoP) strategy to roll-to-roll produce 10 distinct MOF-membranes (loadings up to 86 wt%). Ultrahigh-molecular-weight polyethylene interweaving the MOF particles contributes to their mechanical strength. Rejections (99%) of organic dyes with a water flux of 125.7 L m–2 h–1 bar–1 under cross-flow filtration mode. The micron-sized channels between the MOF particles translate into fast water permeation, while the porous MOFs reject solutes through rapid adsorption. This strategy paves ways for developing high-performance membrane adsorbers for crucial separation processes. As a proof-of-concept, the abilities of the membrane adsorbers for separating racemates and proteins have been demonstrated., Mixed matrix membranes have shown great promise for separation applications, but low filler loading typically leads to low selectivity. Here the authors use a thermally induced phase separation-hot-pressing strategy to fabricate 10 distinct metal-organic framework-based membrane adsorbers with up to 86 wt% MOF-loading.
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- 2019
14. The tissue expression levels of SUMO1P 3 may be a reliable prognostic biomarker to predict the clinical outcomes in patients with HCC
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Dou Ma, Yitao Bai, Qin Liu, Xin He, Yongjun A, Chang Xu, and Henghai Yu
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Oncology ,Male ,medicine.medical_specialty ,Carcinoma, Hepatocellular ,SUMO-1 Protein ,Gene Expression ,Observational Study ,liver cancer ,03 medical and health sciences ,0302 clinical medicine ,lncRNA ,Predictive Value of Tests ,Internal medicine ,Outcome Assessment, Health Care ,Carcinoma ,Biomarkers, Tumor ,Medicine ,Humans ,Clinical significance ,030212 general & internal medicine ,Stage (cooking) ,HCC ,Survival analysis ,Proportional Hazards Models ,Chi-Square Distribution ,business.industry ,Proportional hazards model ,SUMO1P 3 ,Liver Neoplasms ,Cancer ,General Medicine ,Middle Aged ,medicine.disease ,Prognosis ,030220 oncology & carcinogenesis ,Predictive value of tests ,Female ,RNA, Long Noncoding ,business ,Chi-squared distribution ,Research Article - Abstract
Small ubiquitin-like modifier 1 pseudogene 3 (SUMO1P3) is a novel identified long non-coding RNA that is upregulated in several cancers and exerts its oncogenic effects via multiple pathways. SUMO1P3 was significantly higher in HCC tissues and cells than in non-cancerous specimens and normal cells. SUMO1P3 knockdown inhibited the proliferation, migration, and invasion of HCC cells. In the present study, we investigated the clinical significance and prognostic value of SUMO1P3 in HCC. A total of 123 patients were pathologically diagnosed as primary HCC and underwent surgical resection at the Department of Hepatopancreatobiliary Surgery, The Second Affiliated Hospital of Kunming Medical University from March 2014 to November 2019. The expression differences between HCC tissues and matched normal tissues were analyzed using paired Student's t test. Chi-squared test was used for correlation analysis. Survival curves were plotted using the Kaplan–Meier method and were compared via the log-rank test. The independent prognostic value of SUMO1P3 expression was evaluated using results from univariate and multivariate Cox regression models. As revealed by quantitative RT-PCR analysis, SUMO1P 3 expression level was significantly higher in HCC cancer tissues compared with normal adjacent tissues (mean ± SD: 4.341 ± 1.320 vs 1.000 ± 0.3666, P
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- 2020
15. Prevalence and genetic diversity of Echinorhynchus gymnocyprii (Acanthocephala: Echinorhynchidae) in schizothoracine fishes (Cyprinidae: Schizothoracinae) in Qinghai-Tibetan Plateau, China
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Jian Sun, Yong Fu, Dou-Dou Ma, Yan-Ming Zhang, Meng-Tong Lei, Jin-Zhong Cai, Chunhua Li, and Yao-Peng Li
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0301 basic medicine ,Entomology ,China ,Qinghai-Tibetan Plateau ,030231 tropical medicine ,Short Report ,Cyprinidae ,Zoology ,Molecular phylogeny ,Tibet ,lcsh:Infectious and parasitic diseases ,Acanthocephala ,Host-Parasite Interactions ,Electron Transport Complex IV ,03 medical and health sciences ,Fish Diseases ,0302 clinical medicine ,Species Specificity ,DNA, Ribosomal Spacer ,Prevalence ,Animals ,lcsh:RC109-216 ,Internal transcribed spacer ,Phylogeny ,Genetic diversity ,biology ,Phylogenetic tree ,Genetic Variation ,Ribosomal RNA ,biology.organism_classification ,Molecular characterization ,Echinorhynchus gymnocyprii ,Phylogeography ,030104 developmental biology ,Infectious Diseases ,RNA, Ribosomal ,Molecular phylogenetics ,Parasitology ,Schizothoracine fishes ,Helminthiasis, Animal - Abstract
Background The schizothoracine fishes, an excellent model for several studies, is a dominant fish group of the Qinghai-Tibet Plateau (QTP). However, species populations have rapidly declined due to various factors, and infection with Echinorhynchus gymnocyprii is cited as a possible factor. In the present study, the molecular characteristics of E. gymnocyprii in four species of schizothoracine fishes from the QTP were explored. Methods We investigated the infection status of E. gymnocyprii in 156 schizothoracine fishes from the upper Yangtze River, upper Yellow River, and Qinghai Lake in Qinghai Province, China. The complete internal transcribed spacer (ITS) of the ribosomal RNA (rRNA) gene and part of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene of 35 E. gymnocyprii isolates from these fishes were sequenced and their characteristics analyzed. In addition, we inferred phylogenetic relationships of the E. gymnocyprii populations based on the rRNA-ITS and cox1 sequences. Results The total prevalence of E. gymnocyprii in schizothoracine fishes was 57.69% (90/156). However, the prevalence among different species as well as that across the geographical locations of the schizothoracine fishes was significantly different. The results of sequence analysis showed that the four E. gymnocyprii populations from different hosts and regions of Qinghai Province were conspecific, exhibiting rich genetic diversity. Phylogenetic analysis based on rRNA-ITS and cox1 sequences supported the coalescence of branches within E. gymnocyprii; the cox1 gene of E. gymnocyprii populations inferred some geographical associations with water systems. In addition, three species of schizothoracine fishes were recorded as new definitive hosts for E. gymnocyprii. Conclusions To the best of our knowledge, this is the first molecular description of E. gymnocyprii populations in schizothoracine fishes from the Qinghai-Tibet Plateau that provides basic data for epidemiological surveillance and control of acanthocephaliasis to protect endemic fish stocks.
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- 2020
16. Additional file 1 of Prevalence and genetic diversity of Echinorhynchus gymnocyprii (Acanthocephala: Echinorhynchidae) in schizothoracine fishes (Cyprinidae: Schizothoracinae) in Qinghai-Tibetan Plateau, China
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Lei, Meng-Tong, Cai, Jin-Zhong, Li, Chun-Hua, Fu, Yong, Sun, Jian, Dou-Dou Ma, Li, Yao-Peng, and Zhang, Yan-Ming
- Abstract
Additional file 1: Table S1. Comparison of the specific characters of E. gymnocyprii from different hosts and locations.
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- 2020
- Full Text
- View/download PDF
17. Additional file 3 of Prevalence and genetic diversity of Echinorhynchus gymnocyprii (Acanthocephala: Echinorhynchidae) in schizothoracine fishes (Cyprinidae: Schizothoracinae) in Qinghai-Tibetan Plateau, China
- Author
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Lei, Meng-Tong, Cai, Jin-Zhong, Li, Chun-Hua, Fu, Yong, Sun, Jian, Dou-Dou Ma, Li, Yao-Peng, and Zhang, Yan-Ming
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parasitic diseases - Abstract
Additional file 3: Table S3. Percentage nucleotide identity and numbers of nucleotide variations of ITS2 fragments from E. gymnocyprii populations.
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- 2020
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18. Additional file 2 of Prevalence and genetic diversity of Echinorhynchus gymnocyprii (Acanthocephala: Echinorhynchidae) in schizothoracine fishes (Cyprinidae: Schizothoracinae) in Qinghai-Tibetan Plateau, China
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Lei, Meng-Tong, Cai, Jin-Zhong, Li, Chun-Hua, Fu, Yong, Sun, Jian, Dou-Dou Ma, Li, Yao-Peng, and Zhang, Yan-Ming
- Abstract
Additional file 2: Table S2. Percentage nucleotide identity and numbers of nucleotide variations of ITS1 fragments from E. gymnocyprii populations.
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- 2020
- Full Text
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19. Stable Aluminum Metal–Organic Frameworks (Al-MOFs) for Balanced CO2 and Water Selectivity
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Yuanyuan Zhang, Jinwei Zhang, Xiao Feng, Dou Ma, Yi Liu, Haiwei Li, Mengxi Zhang, and Bo Wang
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Terephthalic acid ,Materials science ,Inorganic chemistry ,chemistry.chemical_element ,Sorption ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Ion ,chemistry.chemical_compound ,chemistry ,Aluminium ,Boiling ,General Materials Science ,Metal-organic framework ,0210 nano-technology ,Selectivity ,Aluminum metal - Abstract
Three new Al-MOFs in the formation of [Al4(OH)2(OCH3)4(OH-BDC)3]·xH2O (BIT-72), [Al4(OH)2(OCH3)4(CH3–BDC)3]·xH2O (BIT-73) and {Al4(OH)2(OCH3)4[(CH3)2-BDC]3}·xH2O (BIT-74) have been synthesized by assembling Al3+ ion with terephthalic acid ions decorated with monohydroxyl, monomethyl or dimethyl groups, respectively. All of these three MOFs exhibit high stability in boiling water and acidic conditions. Among them, BIT-72 shows the highest surface area of 1618 m2·g–1 and IAST CO2/N2 selectivity of 48, while BIT-73 and BIT-74 present moderate IAST CO2/N2 selectivity and much lower H2O capacity below P/P0 = 0.3. The high CO2/N2 selectivity together with alleviative H2O sorption at low water relative pressure may provide promising potential in postcombustion CO2 capture.
- Published
- 2018
20. Covalent organic frameworks: a platform for the experimental establishment of the influence of intermolecular distance on phosphorescence
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Pengfei Li, Li Ma, Peng Lei, Dou Ma, Qianyou Wang, Bo Wang, Shuai Yuan, Pengpeng Shao, Xiao Feng, and Shan Wang
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Materials science ,Intermolecular force ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Photochemistry ,01 natural sciences ,0104 chemical sciences ,Solvent ,chemistry.chemical_compound ,chemistry ,Covalent bond ,Intramolecular force ,Materials Chemistry ,Molecule ,Benzil ,0210 nano-technology ,Phosphorescence ,Single crystal - Abstract
We report herein a two-dimensional (2D) COF (BZL-COF) based on an representative crystallization-induced phosphorescence (CIP) organic phosphor, benzil, for phosphorescence study. In BZL-COF, the CIP building blocks are arranged in an eclipsed fashion similar to the face-to-face mode in H-aggregates. The phosphorescence behavior significantly changed from on to off at cryogenic temperature upon altering the interlayer distance from 3.7 A to 3.4 A by removing the solvent molecules trapped between the 2D polymeric layers. In comparison, a single crystal of the model compound that adopts an H-type aggregation with an intermolecular distance of 4.1 A can exhibit strong phosphorescence at room temperature. Our study shows that, in addition to the restriction of intramolecular rotation and H-aggregated packing, suitable intermolecular distance also plays a vital role in enhancing the phosphorescence.
- Published
- 2018
21. Three-Dimensional Anionic Cyclodextrin-Based Covalent Organic Frameworks
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Siwu Li, Haiwei Li, Xiao Feng, Junwen Zhou, Bo Wang, Dou Ma, Xiaojie Ma, Yuanyuan Zhang, Jiyun Duan, and Pengfei Li
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chemistry.chemical_classification ,Materials science ,Cyclodextrin ,Stripping (chemistry) ,010405 organic chemistry ,02 engineering and technology ,General Chemistry ,General Medicine ,Conductivity ,021001 nanoscience & nanotechnology ,010402 general chemistry ,01 natural sciences ,Catalysis ,0104 chemical sciences ,chemistry ,Chemical engineering ,Covalent bond ,Tetrahedron ,Molecule ,Organic chemistry ,Counterion ,0210 nano-technology ,Porosity - Abstract
Three-dimensional covalent organic frameworks (3D COFs) are promising crystalline materials with well-defined structures, high porosity, and low density; however, the limited choice of building blocks and synthetic difficulties have hampered their development. Herein, we used a flexible and aliphatic macrocycle, namely γ-cyclodextrin (γ-CD), as the soft struts for the construction of a polymeric and periodic 3D extended network, with the units joined via tetrakis(spiroborate) tetrahedra with various counterions. The inclusion of pliable moieties in the robust open framework endows these CD-COFs with dynamic features, leading to a prominent Li ion conductivity of up to 2.7 mS cm−1 at 30 °C and excellent long-term Li ion stripping/plating stability. Exchanging the counterions within the pores can effectively modulate the interactions between the CD-COF and CO2 molecules.
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- 2017
22. Phase equilibria for the pseudo-ternary system (NaCl + Na 2 SO 4 + H 2 O) of coal gasification wastewater at T = (268.15 to 373.15) K
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Dou Ma, Ting Wang, Ying Bao, Jun Yu, Haijiao Lu, Hongxun Hao, Yuefeng Wu, and Jingkang Wang
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Environmental Engineering ,Ternary numeral system ,Chromatography ,Chemistry ,General Chemical Engineering ,technology, industry, and agriculture ,02 engineering and technology ,General Chemistry ,021001 nanoscience & nanotechnology ,Biochemistry ,Isothermal process ,020401 chemical engineering ,Chemical engineering ,Wastewater ,Impurity ,0204 chemical engineering ,Solubility ,0210 nano-technology ,Saturation (chemistry) ,Powder diffraction ,Phase diagram - Abstract
The pseudo-ternary system (NaCl + Na2SO4 + H2O) of coal gasification wastewater was studied at T = (268.15 to 373.15) K. The solubility and density of the equilibrium liquid phase were determined by the isothermal solution saturation method. The equilibrium solids were also investigated by the Schreinemaker's method of wet residues and X-ray powder diffraction (XRD). According to the experimental data, the phase diagrams were determined. It was found that there was no significant solubility difference on the NaCl-rich side between the ternary system (NaCl + Na2SO4 + H2O) in coal gasification wastewater and in pure water. However, the solubility on the Na2SO4-rich side of coal gasification wastewater was apparently higher than that of pure water. The increase in the solubility of Na2SO4 was most likely caused by the effects of other impurities apart from NaCl and Na2SO4 in coal gasification wastewater. The measured data and phase equilibrium diagrams can provide fundamental basis for salt recovery in coal gasification wastewater.
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- 2017
23. A Hydrolytically Stable Vanadium(IV) Metal-Organic Framework with Photocatalytic Bacteriostatic Activity for Autonomous Indoor Humidity Control
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Lixia Bao, Pengpeng Shao, Dou Ma, Yuanyuan Zhang, Zhengguo Lin, Ping Li, Zhongling Lang, Bo Wang, Xiangyu Duan, and Jiazhen Li
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Materials science ,Light ,Surface Properties ,Vanadium ,chemistry.chemical_element ,Working capacity ,Microbial Sensitivity Tests ,010402 general chemistry ,01 natural sciences ,Catalysis ,Escherichia coli ,Particle Size ,Density Functional Theory ,Metal-Organic Frameworks ,Moisture ,010405 organic chemistry ,Hydrolysis ,Humidity ,Water ,General Medicine ,General Chemistry ,Photochemical Processes ,0104 chemical sciences ,Anti-Bacterial Agents ,chemistry ,Chemical engineering ,Photocatalysis ,Metal-organic framework ,Mesoporous material ,Porosity ,Visible spectrum - Abstract
Metal-organic frameworks (MOFs) with long-term stability and reversible high water uptake properties can be ideal candidates for water harvesting and indoor humidity control. Now, a mesoporous and highly stable MOF, BIT-66 is presented that has indoor humidity control capability and a photocatalytic bacteriostatic effect. BIT-66 (V3 (O)3 (H2 O)(BTB)2 ), possesses prominent moisture tunability in the range of 45-60 % RH and a water uptake and working capacity of 71 and 55 wt %, respectively, showing good recyclability and excellent performance in water adsorption-desorption cycles. Importantly, this MOF demonstrates a unique photocatalytic bacteriostatic behavior under visible light, which can effectively ameliorate the bacteria and/or mold breeding problem in water adsorbing materials.
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- 2019
24. Genotype-phenotype analysis of a rare type of osteogenesis imperfecta in four Chinese families with WNT1 mutations
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Yi Liu, Ou Wang, Weibo Xia, Dou-dou Ma, Xiao-jie Xu, Yu-wen Song, Yan Jiang, Fang Lv, Xiaoping Xing, Li-jie Song, Mei Li, Jian-yi Wang, and Asan
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Male ,0301 basic medicine ,China ,Candidate gene ,animal structures ,Adolescent ,Genotype ,Dentinogenesis imperfecta ,Clinical Biochemistry ,Wnt1 Protein ,030105 genetics & heredity ,Compound heterozygosity ,medicine.disease_cause ,Biochemistry ,03 medical and health sciences ,symbols.namesake ,medicine ,Humans ,Child ,Gene ,Sanger sequencing ,Bone mineral ,Genetics ,Mutation ,business.industry ,Biochemistry (medical) ,General Medicine ,Osteogenesis Imperfecta ,medicine.disease ,Phenotype ,030104 developmental biology ,Osteogenesis imperfecta ,embryonic structures ,symbols ,Female ,business - Abstract
Backgrounds Osteogenesis imperfecta (OI) is a rare inherited disease characterized by increased bone fragility and vulnerability to fractures. Recently, WNT1 is identified as a new candidate gene for OI, here we detect pathogenic mutations in WNT1 and analyze the genotype-phenotype association in four Chinese families with OI. Methods We designed a targeted next generation sequencing panel with known fourteen OI-related genes. We applied the approach to detect pathogenic mutations in OI patients and confirmed the mutations with Sanger sequencing and cosegregation analysis. Clinical fractures, bone mineral density (BMD) and the other clinical manifestations were evaluated. We also observed the effects of bisphosphonates in OI patients with WNT1 mutations. Results Four compound heterozygous mutations (c.110T > C; c.505 G > T; c. 385G > A; c.506 G > A) in WNT1 were detected in three unrelated families. These four mutations had not been reported yet. A recurrent homozygous mutation (c.506dupG) was identified in the other two families. These patients had moderate to severe OI, white to blue sclera, absence of dentinogenesis imperfecta and no brain malformation. We did not observe clear genotype-phenotype correlation in WNT1 mutated OI patients. Though bisphosphonates increased BMD in WNT1 related OI patients, height did not increase and fracture continued. Conclusions We reported four novel heterozygous variants and confirmed a previous reported WNT1 mutation in four Chinese families with a clinical diagnosis of OI. Our study expanded OI spectrum and confirmed moderate to severe bone fragility induced by WNT1 defects.
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- 2016
25. Novel mutations in FKBP10 in Chinese patients with osteogenesis imperfecta and their treatment with zoledronic acid
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Xiao-jie Xu, Fang Lv, Ou Wang, Weibo Xia, Yi Liu, Yan Jiang, Mei Li, Jian-yi Wang, Dou-dou Ma, Jiawei Wang, Asan, Xiaoping Xing, and Li-jie Song
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Male ,0301 basic medicine ,Proband ,Compound heterozygosity ,medicine.disease_cause ,Zoledronic Acid ,Fractures, Bone ,Exon ,0302 clinical medicine ,Bone Density ,Genotype ,Child ,Genetics (clinical) ,Sanger sequencing ,Mutation ,Bone Density Conservation Agents ,Diphosphonates ,Imidazoles ,High-Throughput Nucleotide Sequencing ,Osteogenesis Imperfecta ,Osteogenesis imperfecta ,Child, Preschool ,symbols ,Female ,medicine.drug ,Adult ,China ,medicine.medical_specialty ,030209 endocrinology & metabolism ,Biology ,Collagen Type I ,Tacrolimus Binding Proteins ,Young Adult ,03 medical and health sciences ,symbols.namesake ,Asian People ,Internal medicine ,Genetics ,medicine ,Humans ,Bone Resorption ,Base Sequence ,Membrane Proteins ,Sequence Analysis, DNA ,medicine.disease ,Molecular biology ,Collagen Type I, alpha 1 Chain ,030104 developmental biology ,Endocrinology ,Zoledronic acid - Abstract
Osteogenesis imperfecta (OI) is a group of hereditary disorders characterized by decreased bone mass and increased fracture risk. The majority of OI cases have an autosomal dominant pattern of inheritance and are usually caused by mutations in genes encoding type I collagen. OI cases of autosomal recessive inheritance are rare, and OI type XI is attributable to mutation of the FKBP10 gene. Here, we used next-generation sequencing and Sanger sequencing to detect mutations in FKBP10 and to analyze their relation to the phenotypes of OI type XI in three Chinese patients. We also evaluated the efficacy of zoledronic acid treatment in these patients. Two of the affected patients had novel compound heterozygous mutations, one patient with c.343C>T (p.R115X) in exon 2 and c.1085delC (p.A362fsX1) in exon 7, and the other patient with c.879C>G (p.Y293X) in exon 5 and c.918-3C>G in intron 5. In the third proband, we identified a homozygous single base-pair duplication, c.831dupC (p.G278RfsX95) in exon 5. In conclusion, we report for the first time that these novel pathogenic mutations of FKBP10 can lead to the extremely rare type XI OI without contractures, which expands the genotypic spectrum of OI. The phenotypes of these patients are similar to patients with types III or IV OI, and zoledronic acid is effective in increasing BMD, inhibiting bone resorption biomarkers and reducing fractures of these patients.
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- 2016
26. Association Between Geranylgeranyl Pyrophosphate Synthase Gene Polymorphisms and Bone Phenotypes and Response to Alendronate Treatment in Chinese Osteoporotic Women
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Xiaoping Xing, Ou Wang, Weibo Xia, Xiao-jie Xu, Fang Lü, Lan-wen Han, Dou-dou Ma, Mei Li, Yan Jiang, and Yi Liu
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0301 basic medicine ,medicine.medical_specialty ,Bone density ,Osteoporosis ,Single-nucleotide polymorphism ,Bone remodeling ,03 medical and health sciences ,Asian People ,Bone Density ,Polymorphism (computer science) ,Internal medicine ,Genotype ,medicine ,Humans ,Osteoporosis, Postmenopausal ,Bone mineral ,Polymorphism, Genetic ,Alendronate ,business.industry ,General Medicine ,medicine.disease ,Osteopenia ,Phenotype ,030104 developmental biology ,Endocrinology ,Geranylgeranyl-Diphosphate Geranylgeranyltransferase ,Female ,business ,Biomarkers - Abstract
Objective To investigate the relationship between geranylgeranyl pyrophosphate synthase (GGPPS) gene polymorphisms and bone response to alendronate in Chinese osteoporotic women.Methods A total of 639 postmenopausal women with osteoporosis or osteopenia were included and randomly received treatment of low dose (70 mg per two weeks) or standard dose (70 mg weekly) of alendronate for one year. The six tag single nucleotide polymorphisms of GGPPS gene were identified. Bone mineral density (BMD), serum cross-linked C-telopeptide of type I collagen (β-CTX), and total alkaline phosphatase (ALP) were measured before and after treatment. GGPPS gene polymorphisms and the changes of BMD and bone turnover markers after treatment were analyzed.Results rs10925503 polymorphism of GGPPS gene was correlated to serum β-CTX levels at baseline, and patients with TT genotype had significantly higher serum β-CTX level than those with TC or CC genotype (all P0.05). No correlation was found between polymorphisms of GGPPS gene and serum total ALP levels, as well as BMD at baseline. After 12 months of treatment, lumbar spine and hip BMD increased and serum bone turnover markers decreased significantly (P0.01), and without obvious differences between the low dose and standard dose groups (all P0.05). However, GGPPS gene polymorphisms were uncorrelated to percentage changes of BMD, serum total ALP, and β-CTX levels (all P0.05).Conclusion GGPPS gene polymorphisms are correlated to osteoclasts activity, but all tag single nucleotide polymorphisms of GGPPS gene have no influence on the skeletal response to alendronate treatment.
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- 2016
27. Trends and Driving Forces of Carbon Emissions from Energy Consumption: A Case Study of Nanjing, China
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Dou-Dou Ma, Ran Lu, Rui-Wen Chu, Kong-Qing Li, and Li-Qun Zhu
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China ,Natural resource economics ,020209 energy ,Geography, Planning and Development ,Population ,TJ807-830 ,02 engineering and technology ,Management, Monitoring, Policy and Law ,TD194-195 ,Renewable energy sources ,Urban planning ,energy consumption ,0202 electrical engineering, electronic engineering, information engineering ,Per capita ,GE1-350 ,education ,education.field_of_study ,Environmental effects of industries and plants ,Renewable Energy, Sustainability and the Environment ,Urban sprawl ,Energy consumption ,Environmental sciences ,Urban economics ,STIRPAT model ,Nanjing ,Greenhouse gas ,Energy intensity ,Environmental science ,carbon emissions - Abstract
Based on the scientific calculation of carbon emissions from energy consumption in Nanjing, this paper analyzed the driving forces of carbon emissions from 2000 to 2016 by using the stochastic impacts by regression on population, affluence and technology (STIRPAT) model. The results show that from 2000 to 2016, the energy carbon emissions of Nanjing were on the rise, the urbanization rate, population, GDP per capita, and energy intensity had a significant positive impact on the growth of carbon emissions in Nanjing, China. Based on this, we presented five development scenarios to analyze the future trend of carbon emissions of the city. By contrast, the growth rate of carbon emissions from energy consumption is the slowest when the population maintains a low growth rate and the GDP per capita and technical level maintain high growth. This indicates a better urban development strategy in which industrial restructuring must be associated with talent structure adjustment to decarbonize the urban economy, and the extensive urban sprawl development approach might need to be changed.
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- 2018
28. Stable Aluminum Metal-Organic Frameworks (Al-MOFs) for Balanced CO
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Haiwei, Li, Xiao, Feng, Dou, Ma, Mengxi, Zhang, Yuanyuan, Zhang, Yi, Liu, Jinwei, Zhang, and Bo, Wang
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Three new Al-MOFs in the formation of [Al
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- 2018
29. 3D Microporous Lanthanide–Organic Frameworks Constructed from Left‐ and Right‐Handed Helical Chains: Synthesis, Crystal Structure, and Tunable Photoluminescence
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Rui Huo, Dou Ma, and Xia Li
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Inorganic Chemistry ,Lanthanide ,Crystallography ,Photoluminescence ,Stereochemistry ,Chemistry ,Molecule ,Metal-organic framework ,Crystal structure ,Microporous material ,Isostructural ,Luminescence - Abstract
New lanthanide–organic frameworks, [Ln2(2,6-NDS)3(IP)(H2O)4]·H2O {Ln = Sm (1), Eu (2), Tb (3); 2,6-NDS = 2,6-Anaphthalenedisulfonate, IP = 1H-imidazo[4,5-f][1,10]-phenanthroline}, were synthesized and characterized. These complexes are isostructural and have three-dimensional structures (3D) composed of a pair of entanglement double helixes. The structure is an open framework with rhombic channels filled with uncoordinated water molecules. The photoluminescence properties of the SmIII complex (1) and EuIII/TbIII-doped complex were explored by adjusting the excitation wavelengths. Interestingly, SmIII complex 1 generated a white-light emission, whereas the EuIII/TbIII-doped complex (Tb0.95Eu0.05) allowed the realization of white-light emission under broad UV wavelengths. An energy transfer for TbIII 5D4EuIII 5D0 was observed.
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- 2015
30. Lanthanide coordination frameworks constructed from 1,3-benzenedicarboxylate, oxalate and 1,10-phenanthroline: crystal structure, multicolor luminescence and high-efficiency white light emission
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Xia Li, Dou Ma, and Rui Huo
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Lanthanide ,Chemistry ,Phenanthroline ,Quantum yield ,General Chemistry ,Crystal structure ,Condensed Matter Physics ,Photochemistry ,Oxalate ,chemistry.chemical_compound ,Crystallography ,General Materials Science ,SBus ,Isostructural ,Luminescence - Abstract
New complexes, [Ln2(1,3-BDC)2(phen)2(ox)(H2O)] (Ln = Eu (1), Tb (2), and Yb (3), 1,3-BDC = 1,3-benzenedicarboxylate, ox = oxalate, and phen = 1,10-phenanthroline), have been obtained under hydrothermal conditions. The isostructural complexes 1–3 have 3D structures with helical chains assembled from tetrameric secondary building units (SBUs) by 1,3-BDC and ox-mixed linkers. Complex 1 shows red luminescence with a high quantum yield (Φ = 63.21%) of Eu(III) (5D4 → 7F0–4) while complex 2 exhibits green luminescence (Φ = 10.13%) of Tb(III) (5D4 → 7F6–2). The Yb:Tb:Eu doped complex reveals significant multicolor luminescence from blue, green, yellow to white regions through tuning of the excitation wavelengths. High-efficiency white light emission (Φ = 20.4%) was achieved and energy transfer from Tb(III) to Eu(III) was observed.
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- 2015
31. Unique lanthanide frameworks with 63 topology based on 1,5-naphthalenedisulfonate and 1H-imidazo[4,5-f][1,10]-phenanthroline: syntheses, crystal structure, photoluminescence, and white light emission
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Dou Ma, Rui Huo, and Xia Li
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Lanthanide ,Materials science ,Photoluminescence ,Ligand ,Phenanthroline ,General Chemistry ,Crystal structure ,Condensed Matter Physics ,Topology ,Fluorescence ,Ion ,chemistry.chemical_compound ,chemistry ,General Materials Science ,Topology (chemistry) - Abstract
Novel lanthanide–organic frameworks {[Ln2(1,5-NDS)3(IP)4(H2O)2]·9H2O}n (Ln = Pr 1, Sm 2, Eu 3, Gd 4, Dy 5, Tb 6; 1,5-NDS = 1,5-naphthalenedisulfonate, and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline) were synthesized and characterized. The complexes possess unique 2D architectures with 63 topology, and their structures consist of three-connected uninodal chain-layer framework with helical characteristics. Complexes 1, 4, 5, and 6 show ligand-based fluorescence, whereas complexes 2 and 3 show typical emission with 4f–4f transitions for Ln(III) ions. The Sm(III) framework (2) exhibits white light emission. The two-component Ln(III) (Gd, Dy, and Pr)-doped Eu(III) complexes also exhibit white light emission. When the Gd(III) ion is incorporated into the Eu(III) framework with arbitrary ratios of Gd : Eu, white light emission is achieved.
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- 2015
32. Proper Use of Capillary Number in Chemical Flooding
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Guo, Hu, Dou, Ma, Hanqing, Wang, Wang, Fuyong, Yuanyuan, Gu, Yu, Zhaoyan, Yansheng, Wang, and Li, Yiqiang
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Article Subject - Abstract
Capillary number theory is very important for chemical flooding enhanced oil recovery. The difference between microscopic capillary number and the microscopic one is easy to confuse. After decades of development, great progress has been made in capillary number theory and it has important but sometimes incorrect application in EOR. The capillary number theory was based on capillary tube bundles and Darcy’s law hypothesis, and this should always be kept in mind when used in chemical flooding EOR. The flow in low permeability porous media often shows obvious non-Darcy effects, which is beyond Darcy’s law. Experiments data from ASP flooding and SP flooding showed that remaining oil saturation was not always decreasing as capillary number kept on increasing. Relative permeability was proved function of capillary number; its rate dependence was affected by capillary end effects. The mobility control should be given priority rather than lowering IFT. The displacement efficiency was not increased as displacement velocity increased as expected in heavy oil chemical flooding. Largest capillary number does not always make highest recovery in chemical flooding in heterogeneous reservoir. Misuse of CDC in EOR included the ignorance of mobility ratio, Darcy linear flow hypothesis, difference between microscopic capillary number and the microscopic one, and heterogeneity caused flow regime alteration. Displacement of continuous oil or remobilization of discontinuous oil was quite different.
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- 2017
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33. Lead(II) coordination frameworks with 3-fluorophthalic acid: hydrothermal synthesis, crystal structure, and luminescence
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Kai Zhao, Dou Ma, Xia Li, Rui Huo, and Shuang Song
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Crystallography ,Stereochemistry ,Decarboxylation ,Chemistry ,Hydrogen bond ,Materials Chemistry ,Supramolecular chemistry ,Hydrothermal synthesis ,Molecule ,Crystal structure ,Physical and Theoretical Chemistry ,Luminescence ,Supramolecular assembly - Abstract
Hydrothermal reactions of Pb(NO3)2 and 3-fluorophthalic acid (H2Fpht) in the absence or presence of 2,2′-bipyridine (bpy) gave two coordination polymers: Pb5(Fpht)4(Fba)2 (1) and [Pb2(Fpht)2(bpy)(H2O)]·3H2O (2). The 3-fluorobenzoic acid (HFba) results from an in situ decarboxylation of H2Fpht. Solid 1 displays a 2-D structure, comprising center-related hexanuclear [Pb3(COO)6]2 units. There are three crystallographically different Pb(II) ions and two different ligands, Fpht and Fba. The Fpht ligands adopt μ6 : η5η3 and μ6 : η3η4 unusual bridging coordination modes. A 3-D supramolecular architecture is formed via C–H⋯F hydrogen bonds. Solid 2 possesses a 1-D chain structure, comprising center-related tetranuclear [Pb2(COO)4]2 units. There are two crystallographically different Pb(II) ions. The Fpht ligands adopt μ3 : η2η3 and μ4 : η3η3 bridging coordination. The free water molecules form (H2O)3 clusters to link the 1-D chain by hydrogen bonds. A 3-D supramolecular assembly is constructed via hydrogen bonds ...
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- 2014
34. Lanthanide Complexes Assembled from 3‐Fluorophthalate and 1,10‐Phenanthroline: Syntheses, Crystal Structure, Photoluminescence, and White‐Light Emission
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Rui Huo, Dou Ma, Xia Li, and Yu-E. Cha
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Inorganic Chemistry ,Lanthanide ,chemistry.chemical_compound ,Crystallography ,Denticity ,chemistry ,Ligand ,Stereochemistry ,Phenanthroline ,Molecule ,Metal-organic framework ,Crystal structure ,Luminescence - Abstract
Two different crystal forms, [Ln4(Fpht)6(phen)6(H2O)4]·nH2O (Ln = Eu 1, n = 14; Tb 2, n = 12) and [Ln(Fpht)(HFpht)(phen)(H2O)] (Ln = La 3, Eu 4, Tb 5) were obtained from the one-pot reaction of LnIII ions with 3-fluorophthalic acid (H2Fpht) and 1,10-phenanthroline (phen). Complexes 1 and 2 are centrosymmetric tetranuclear molecules with two crystallographically different LnIII ion environments, [Ln(1)O6N2] and [Ln(2)O4N4]. The complexes have a tridentate bridging Fpht ligand and a bidentate terminal Fpht ligand. Complexes 3–5 show 2D networks with [LnO7N2] polyhedra. There are two kinds of ligands, Fpht and HFpht, which adopt chelating-bridging/monodentate and bidentate-bridging coordination modes, respectively. The LaIII complex shows ligand-centered fluorescence. EuIII and TbIII complexes display red 5D0 7F0–4 and green 5D4 7F6–2 characteristic luminescence, respectively. Intriguingly, white-light emission was produced when EuIII and TbIII were codoped into the 2D LaIII complex.
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- 2014
35. White light emission by a lanthanide doped Sm(<scp>iii</scp>) framework constructed from 4-sulfobenzoate and 1H-imidazo[4,5-f][1,10]-phenanthroline
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Dou Ma, Shuang Song, Yi-Hua Zhang, Rui Huo, and Xia Li
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Inorganic Chemistry ,Lanthanide ,Crystallography ,chemistry.chemical_compound ,Materials science ,chemistry ,Dopant ,Phenanthroline ,Doping ,White light ,Isostructural ,Luminescence - Abstract
The 2D isostructural lanthanide-organic frameworks [Ln(4-SBA)(IP)OH] · 1.5H2O (Ln = Sm 1, Eu, 2 Gd3 and Tb 4 ; 4-SBA = 4-sulfobenzoate and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline) display different luminescent behavior. White light emission was realized by introducing single dopant Eu(III) and codopants Eu(III)/Gd(III) or Eu(III)/Tb(III) into the Sm(III) framework for the first time.
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- 2014
36. A high-efficiency white light-emitting lanthanide–organic framework assembled from 4,4′-oxybis(benzoic acid), 1,10-phenanthroline and oxalate
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Xia Li, Rui Huo, and Dou Ma
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Lanthanide ,chemistry.chemical_compound ,chemistry ,Phenanthroline ,Doping ,Inorganic chemistry ,Materials Chemistry ,White light ,General Chemistry ,Oxalate ,Nuclear chemistry ,Benzoic acid - Abstract
The metal–organic frameworks, [Ln(oba)phen(ox)0.5]n (H2oba = 4,4′-oxybis(benzoic acid), phen = 1,10-phenanthroline and ox = oxalate), have been designed and synthesized. The Eu(III)/Tb(III)-frameworks display highly efficient red/green emissions, respectively. A high-efficiency white light emission was realized through the doping of the Gd(III) framework with Eu(III)/Tb(III).
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- 2014
37. Lanthanide coordination frameworks: crystal structure, down- and up-conversion luminescence and white light emission
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Hong-Yu Yang, Yi-Hua Zhang, Dou Ma, Xia Li, Shuang Song, and Yi-Heng Liu
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Lanthanide ,Denticity ,Materials science ,Inorganic chemistry ,Doping ,General Chemistry ,Crystal structure ,Condensed Matter Physics ,Oxalate ,chemistry.chemical_compound ,Crystallography ,chemistry ,Hydrothermal synthesis ,General Materials Science ,Isostructural ,Luminescence - Abstract
Lanthanide–organic frameworks (LnOFs), [Sm(H2N-BDS)0.5(ox)(phen)] (1) and [Ln(H2N-BDS)(ox)0.5(phen)2] (Ln = Eu 2, Gd 3, Tb 4, Er 5, Yb 6; H2N-BDS = 2-amino-1,4-benzenedisulfonate, ox = oxalate, and phen = 1,10-phenanthroline) were obtained using hydrothermal synthesis. Structural analyses revealed that 1 is a three-dimensional (3D) pillared-layer structure constructed from [SmO6N2] polyhedra, and tetradentate H2N-BDS and tetradentate ox ligands, while complexes 2–6 are isostructural 2D frameworks, constructed from [LnO4N4] polyhedra, and bidentate H2N-BDS and tetradentate ox ligands. The LnOFs containing Sm(III), Eu(III) and Tb(III) ions exhibited the characteristic down-conversion luminescence of the corresponding Ln(III) ions. The Gd:Tb,Eu doped complex provided a white light emission. The Gd:Yb,Er doped complex exhibited up-conversion emissions at 410 nm (4H9/2 → 4I15/2, blue), 518–570 nm (4S3/2, 2H11/2 → 4I15/2, green), and 655 nm (4F9/2 → 4I15/2, red).
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- 2014
38. THE CLINICAL CHARACTERISTICS AND EFFICACY OF BISPHOSPHONATES IN AUDLT PATIENTS WITH OSTEOGENESIS IMPERGECTA
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Jian-yi Wang, Fang Lv, Dou-dou Ma, Ou Wang, Weibo Xia, Yan Jiang, Xiao-jie Xu, Mei Li, Yi Liu, Wei Yu, and Xiaoping Xing
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Adult ,Male ,medicine.medical_specialty ,Bone density ,Adolescent ,Endocrinology, Diabetes and Metabolism ,030209 endocrinology & metabolism ,Zoledronic Acid ,Bone remodeling ,law.invention ,Intravenous bisphosphonates ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Endocrinology ,Absorptiometry, Photon ,Randomized controlled trial ,law ,Bone Density ,Internal medicine ,Outcome Assessment, Health Care ,medicine ,Humans ,030212 general & internal medicine ,Alendronate ,Bone Density Conservation Agents ,Diphosphonates ,business.industry ,Imidazoles ,Recurrent fractures ,General Medicine ,Middle Aged ,Osteogenesis Imperfecta ,medicine.disease ,Surgery ,stomatognathic diseases ,Zoledronic acid ,Osteogenesis imperfecta ,Female ,Bone Remodeling ,business ,Biomarkers ,medicine.drug - Abstract
Osteogenesis imperfecta (OI) is characterized by low bone mass and recurrent fractures. Adults with OI are often treated with oral or intravenous bisphosphonates (BPs). We investigated the clinical phenotypes of adult OI patients and prospectively compared the efficacy of oral alendronate (ALN) with intravenous zoledronic acid (ZOL) in OI patients.This 24-month, observational, randomized clinical study included 60 adult patients with OI. We compared the differences in bone mineral density (BMD) and bone turnover biomarkers between OI adults and healthy subjects. Thereafter, OI patients were randomized at a 2:1 ratio to receive either weekly oral ALN 70 mg or once-yearly infusion of ZOL 5 mg. The efficacy outcomes were changes in BMD, bone turnover biomarkers, and fracture incidence.Adult OI patients had significantly lower BMD and significantly higher cross-linked C-telopeptide of type I collagen (β-CTX) levels than age-/sex-/BMI-matched healthy subjects. A total of 52 patients completed the 24-month clinical study. BMD at lumbar spine, femoral neck, and total hip were equivalently elevated in the ALN (10.5, 13.2, and 14.7%, respectively) and ZOL (11.3, 13.7, and 11.7%, respectively; all P.05) groups. Serum alkaline phosphatase decreased by 30.3% in the ALN group and 37.3% in the ZOL group (P = .12), and β-CTX decreased by 58.0% in the ALN group and 63.6% in the ZOL group (P = .48). Compared to the prior fracture rates, clinical fracture incidences were decreased in the ALN and ZOL groups (both P.05).Adults with OI present significantly lower bone mass and higher bone resorption biomarkers than healthy populations. Oral ALN and intravenous ZOL are equally effective at increasing BMD and inhibiting bone turnover in adults with OI. The treatment may reduce fractures in this study, but further efforts are still needed to demonstrate the anti-fracture efficacy of BPs.25OHD = 25-hydroxyvitamin D ALN = alendronate ALP = alkaline phosphatase BMD = bone mineral density BMI = body mass index BP = bisphosphonate β-CTX = cross-linked C-telopeptide of type I collagen FN = femoral neck LS = lumbar spine OI = osteogenesis imperfecta RCT = randomized controlled trial TH = total hip ZOL = zoledronic acid.
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- 2016
39. EFFECTS OF LONG-TERM ALENDRONATE TREATMENT ON A LARGE SAMPLE OF PEDIATRIC PATIENTS WITH OSTEOGENESIS IMPERFECTA
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Xiao-jie Xu, Fang Lv, Jian-yi Wang, Dou-dou Ma, Yi Liu, Ou Wang, Weibo Xia, Mei Li, Wei Yu, Xiaoping Xing, and Yan Jiang
- Subjects
0301 basic medicine ,Male ,medicine.medical_specialty ,Time Factors ,Bone density ,Adolescent ,Endocrinology, Diabetes and Metabolism ,030209 endocrinology & metabolism ,Outcome assessment ,Bone remodeling ,03 medical and health sciences ,Fractures, Bone ,0302 clinical medicine ,Endocrinology ,stomatognathic system ,Bone Density ,Outcome Assessment, Health Care ,Medicine ,Humans ,Child ,Alendronate ,Bone Density Conservation Agents ,business.industry ,Follow up studies ,Osteogenesis Imperfecta ,medicine.disease ,Large sample ,Surgery ,030104 developmental biology ,Osteogenesis imperfecta ,Female ,Bone Remodeling ,business ,Biomarkers ,Bone mass ,Follow-Up Studies - Abstract
Osteogenesis imperfecta (OI) is a group of inherited diseases characterized by reduced bone mass, recurrent bone fractures, and progressive bone deformities. Here, we evaluate the efficacy and safety of long-term treatment with alendronate in a large sample of Chinese children and adolescents with OI.In this prospective study, a total of 91 children and adolescents with OI were included. The patients received 3 years' treatment with 70 mg alendronate weekly and 500 mg calcium daily. During the treatment, fracture incidence, bone mineral density (BMD), and serum levels of the bone turnover biomarkers (alkaline phosphatase [ALP] and cross-linked C-telopeptide of type I collagen [β-CTX]) were evaluated. Linear growth speed and parameters of safety were also measured.After 3 years of treatment, the mean annual fracture incidence decreased from 1.2 ± 0.8 to 0.2 ± 0.3 (P.01). BMD at the lumbar spine and femoral neck significantly increased by 74.6% and 39.5%, with their BMD Z-score increasing from -3.0 to 0.1 and from -4.2 to -1.3, respectively (both P.01 vs. baseline). In addition, serum ALP and β-CTX levels decreased by 35.6% and 44.3%, respectively (both P.05 vs. baseline). Height significantly increased, but without an obvious increase in its Z-score. Patient tolerance of alendronate was good.Three years' treatment with alendronate was demonstrated for the first time to significantly reduce fracture incidence, increase lumbar spine and femoral neck BMD, and decrease bone turnover biomarkers in Chinese children and adolescents with OI.ALP = alkaline phosphatase β-CTX = cross-linked C-telopeptide of type I collagen BMD = bone mineral density BP = bisphosphonate DXA = dual-energy X-ray absorptiometry 25OHD = 25-hydroxyvitamin D OI = osteogenesis imperfecta PTH = parathyroid hormone.
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- 2016
40. Osteogenesis imperfecta type V: Genetic and clinical findings in eleven Chinese patients
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Xiao-jie Xu, Fang Lv, Dou-dou Ma, Yan Jiang, Jiawei Wang, Jian-yi Wang, Peiran Zhou, Ou Wang, Weibo Xia, Xiaoping Xing, Yi Liu, Mei Li, Wei Yu, and Asan
- Subjects
0301 basic medicine ,Adult ,Male ,medicine.medical_specialty ,China ,Adolescent ,Genotype ,Clinical Biochemistry ,030209 endocrinology & metabolism ,Biochemistry ,Gastroenterology ,03 medical and health sciences ,0302 clinical medicine ,Genotype-phenotype distinction ,Asian People ,Internal medicine ,medicine ,Humans ,Child ,Bone mineral ,business.industry ,Incidence (epidemiology) ,Biochemistry (medical) ,Infant ,General Medicine ,Middle Aged ,Osteogenesis Imperfecta ,medicine.disease ,Surgery ,030104 developmental biology ,Zoledronic acid ,Phenotype ,Osteogenesis imperfecta ,Child, Preschool ,Mutation ,Female ,business ,Type I collagen ,medicine.drug ,Calcification - Abstract
Osteogenesis imperfecta (OI) type V is a rare inherited disease characterized by multiple fractures, intraosseous membrane calcification, and hypercallus formation. We investigate the causative gene, phenotype and also observe the effects of zoledronic acid in Chinese OI type V patients.The clinical phenotype and causative gene mutation was investigated in eleven patients with type V OI. Patients were given a dose of zoledronic acid 5mg intravenously. Fracture incidence and Z-score of bone mineral density (BMD) were evaluated. Serum levels of biomarkers such as cross linked C-telopeptide of type I collagen (β-CTX) and safety parameters were assessed.The c.-14CT mutation in the 5' untranslated region of IFITM5 was detected in all patients. The phenotype was largely variable, and no significant correlation of genotype and phenotype was found. After one dose of zoledronic acid infusion, fracture incidence significantly dropped from 2fractures/year before treatment to 0fracture/year after treatment (P=0.01). Z score of lumbar spine BMD elevated from -2.6 to -1.3 (P0.001). Serum β-CTX level decreased by 50% (P0.05). No serious adverse event was found.No obvious correlation was found between the genotype and phenotype. Zoledronic acid had significantly skeletal protective effects in OI of type V.
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- 2016
41. The analysis of DKK1 polymorphisms in relation to skeletal phenotypes and bone response to alendronate treatment in Chinese postmenopausal women
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Ou Wang, Weibo Xia, Peiran Zhou, Jian-yi Wang, Yi Liu, Yan Jiang, Mei Li, Dou-dou Ma, Xiaoping Xing, and Xiao-jie Xu
- Subjects
musculoskeletal diseases ,0301 basic medicine ,medicine.medical_specialty ,Bone density ,Osteoporosis ,Single-nucleotide polymorphism ,Polymorphism, Single Nucleotide ,Collagen Type I ,Bone remodeling ,03 medical and health sciences ,chemistry.chemical_compound ,Asian People ,Bone Density ,Internal medicine ,Genetics ,medicine ,Humans ,Prospective Studies ,Prospective cohort study ,Genetic Association Studies ,Osteoporosis, Postmenopausal ,Pharmacology ,Bone mineral ,Creatinine ,Alendronate ,Bone Density Conservation Agents ,business.industry ,Alanine Transaminase ,medicine.disease ,Alkaline Phosphatase ,Osteopenia ,Bone Diseases, Metabolic ,030104 developmental biology ,Endocrinology ,chemistry ,Molecular Medicine ,Intercellular Signaling Peptides and Proteins ,Bone Remodeling ,business ,Peptides ,Biomarkers - Abstract
Aim: To investigate the correlation between DKK1 polymorphisms with bone phenotypes and response to alendronate treatment. Materials & methods: Five tag single nucleotide polymorphisms of DKK1 were analyzed in 639 Chinese postmenopausal women with osteoporosis or osteopenia. Bone mineral density (BMD), β-CTX and ALP were measured before and after alendronate treatment. Results: Genotypes at rs1896367, rs1528877 and rs2241529 correlated to baseline BMD (p < 0.05). rs1528877 and rs2241529 polymorphisms correlated to baseline β-CTX levels (p < 0.05). rs2241529 polymorphisms of DKK1 had a small influence on the skeletal response to alendronate treatment (p < 0.05). Conclusion: DKK1 polymorphisms may correlate to baseline BMD and serum β-CTX levels, but present a weak effect on the response to alendronate.
- Published
- 2016
42. Two-dimensional volume of fluid simulation studies on single bubble formation and dynamics in bubble columns
- Author
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Can Tang, Yonggui Zu, Mingyan Liu, and Dou Ma
- Subjects
Physics ,Coalescence (physics) ,Maximum bubble pressure method ,Applied Mathematics ,General Chemical Engineering ,Bubble ,General Chemistry ,Mechanics ,Industrial and Manufacturing Engineering ,Physics::Fluid Dynamics ,Surface tension ,Classical mechanics ,Volume of fluid method ,Liquid bubble ,Coaxial ,Body orifice - Abstract
In this paper, the volume of fluid (VOF) model in conjunction with continuum surface force (CSF) model was used to numerically investigate the single bubble formation and dynamics in the bubble columns on the software platform of Fluent 6.3. A set of transient conservation equations of mass and momentum taking surface tension and gravitational force effects into consideration were solved by pressure implicit splitting operator (PISO) algorithm and a piecewise linear interface calculation (PLIC) was applied to characterize the behavior of gas–liquid interface movement in the VOF method. The simulation results of bubble formation and dynamics compare well with available literature results. The effects of physical properties including surface tension, liquid viscosity and density, gas or liquid operation conditions and orifice size on the single bubble generation, detachment, rising and coaxial bubble coalescence were systematically analyzed, and the effect of superficial liquid velocity on single bubble behavior was especially discussed. It is found that non-zero superficial liquid velocity enhances the bubble detachment, decreases the bubble size, and delays the coaxial bubble coalescence obviously. Increasing superficial liquid velocity largely raises the velocity of the leading bubble and enlarging orifice gas velocity mainly accelerates the second bubble of two coalescence bubbles.
- Published
- 2012
43. Cancer-Cell-Activated Photodynamic Therapy Assisted by Cu(II)-Based Metal–Organic Framework.
- Author
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Yuanbo Wang, Wenbo Wu, Jingjing Liu, Manghnani, Purnima Naresh, Fang Hu, Dou Ma, Cathleen Teh, Bo Wang, and Bin Liu
- Published
- 2019
- Full Text
- View/download PDF
44. Gorham-Stout disease: radiological, histological, and clinical features of 12 cases and review of literature
- Author
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Yan Jiang, Mei Li, Ou Wang, Weibo Xia, Dou-dou Ma, Fang Lv, Yi Liu, Peiran Zhou, Xiaoping Xing, and Dingrong Zhong
- Subjects
CD31 ,Adult ,Male ,Pathology ,medicine.medical_specialty ,Osteolysis ,Adolescent ,medicine.medical_treatment ,Biopsy ,Bone and Bones ,Bone remodeling ,03 medical and health sciences ,chemistry.chemical_compound ,Young Adult ,0302 clinical medicine ,Absorptiometry, Photon ,Rheumatology ,Bone Density ,Lymphangioma ,medicine ,Humans ,Child ,Retrospective Studies ,Diphosphonates ,business.industry ,Chylothorax ,General Medicine ,Angiomatosis ,Bisphosphonate ,medicine.disease ,Vascular endothelial growth factor ,Treatment Outcome ,chemistry ,030220 oncology & carcinogenesis ,Child, Preschool ,Female ,Osteolysis, Essential ,business ,030217 neurology & neurosurgery - Abstract
Gorham-Stout disease (GSD) is an exceedingly rare disease characterized by progressive osteolysis and angiomatosis. We investigate the features of this disease and evaluate the effects of bisphosphonates (BPs) on it. The clinical, radiological, and pathological characteristics of 12 patients diagnosed with GSD were summarized. Immunohistochemical staining with specific lymphatic endothelial markers (D2-40), vascular markers (CD 31, CD 34), and vascular endothelial growth factor (VEGF) and vascular endothelial growth factor receptor 3 (VEGFR-3) was performed in specimens of bone biopsy. Patients were treated with either BPs or conjunction therapy of radiation and BPs. The effects of BPs were evaluated by the change of radiological progression, bone mineral density (BMD) and bone turnover biomarkers. To further evaluate the prognosis, a literature review was done. Idiopathic massive osteolysis was found in all patients, including 11 polyostotic and one mono-ostotic osteolysis. Soft tissue lymphangioma was presented in four patents. Four patients were complicated with chylothorax. Endothelial cells lining the proliferative vessels were positive for CD31 and CD34 and D2-40. Mild expression of VEGF and VEGFR-3 was also revealed. Stabilization in osteolysis and improvement in BMD were observed after single therapy with BPs or combined with radiotherapy. High mortality rate was found in patients with chylothorax. Spontaneous, progressive osteolysis is the most typical sign of GSD. BPs and radiotherapy can contribute to the clinical stabilization in bone lesion of GSD. The complicated chylothorax possibly indicates poor prognosis.
- Published
- 2014
45. Review of Capillary Number in Chemical Enhanced Oil Recovery
- Author
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Guo, Hu, additional, Dou, Ma, additional, Hanqing, Wang, additional, Wang, Fuyong, additional, Yuanyuan, Gu, additional, Yu, Zhaoyan, additional, Yansheng, Wang, additional, and Li, Yiqiang, additional
- Published
- 2015
- Full Text
- View/download PDF
46. Erratum to 'Two-dimensional volume of fluid simulation studies on single bubble formation and dynamics in bubble columns' [Chem. Eng. Sci. 72 (2012) 61–77]
- Author
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Yonggui Xu, Dou Ma, Mingyan Liu, and Can Tang
- Subjects
Chemistry ,Applied Mathematics ,General Chemical Engineering ,Bubble ,Dynamics (mechanics) ,Volume of fluid method ,Thermodynamics ,General Chemistry ,Liquid bubble ,Industrial and Manufacturing Engineering - Published
- 2013
47. Lanthanide coordination frameworks: crystal structure, down- and up-conversion luminescence and white light emission.
- Author
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Yi-Hua Zhang, Xia Li, Shuang Song, Hong-Yu Yang, Dou Ma, and Yi-Heng Liu
- Subjects
RARE earth metals ,COORDINATION polymers synthesis ,POLYMERIZATION research ,PHENANTHROLINE ,LUMINESCENCE ,CRYSTALLOGRAPHY - Abstract
Lanthanide-organic frameworks (LnOFs), [Sm(H
2 N-BDS)0.5 (ox)(phen)] (1) and [Ln(H2 N-BDS)(ox)0.5 (phen)2 ] (Ln = Eu 2, Gd 3, Tb 4, Er 5, Yb 6; H2 N-BDS = 2-amino-1,4-benzenedisulfonate, ox = oxalate, and phen = 1,10-phenanthroline) were obtained using hydrothermal synthesis. Structural analyses revealed that 1 is a three-dimensional (3D) pillared-layer structure constructed from [SmO6 N2 ] polyhedra, and tetradentate H2 N-BDS and tetradentate ox ligands, while complexes 2-6 are isostructural 2D frameworks, constructed from [LnO4 N4 ] polyhedra, and bidentate H2 N-BDS and tetradentate ox ligands. The LnOFs containing Sm(III), Eu(III) and Tb(III) ions exhibited the characteristic down-conversion luminescence of the corresponding Ln(III) ions. The Gd:Tb,Eu doped complex provided a white light emission. The Gd:Yb,Er doped complex exhibited up-conversion emissions at 410 nm (4 H9/2 →4 I15/2 , blue), 518-570 nm (4 S3/2 , ²H11/2 →4 I15/2 , green), and 655 nm(4 F9/2 →4 I15/2 , red). [ABSTRACT FROM AUTHOR]- Published
- 2014
- Full Text
- View/download PDF
48. White light emission by a lanthanide doped Sm(III) framework constructed from 4-sulfobenzoate and 1H-imidazo[4,5-f][1,10]-phenanthroline.
- Author
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Shuang Song, Xia Li, Yi-Hua Zhang, Rui Huo, and Dou Ma
- Subjects
PHOTON emission ,RARE earth metals ,SAMARIUM compounds ,BENZOATES ,IMIDAZOLES ,PHENANTHROLINE ,ORGANIC compounds ,DOPING agents (Chemistry) - Abstract
The 2D isostructural lanthanide–organic frameworks [Ln(4-SBA)- (IP)OH]·1.5H
2 O (Ln = Sm 1, Eu 2, Gd 3 and Tb 4; 4-SBA = 4-sulfobenzoate and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline) display different luminescent behavior. White light emission was realized by introducing single dopant Eu(III) and codopants Eu(III)/Gd(III) or Eu(III)/Tb(III) into the Sm(III) framework for the first time. [ABSTRACT FROM AUTHOR]- Published
- 2014
- Full Text
- View/download PDF
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