260 results on '"Hai-Peng Li"'
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2. Phonon thermal transport in bilayer polycrystalline graphene nanoribbons: effects of interlayer interaction, grain size, and vacancy defects
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Zi-Qiang Yang, Muhammad Asif Shakoori, and Hai-Peng Li
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Polycrystalline graphene ,Phonon thermal conductivity ,Interfacial thermal resistance ,Interlayer interaction ,Physics ,QC1-999 - Abstract
Abstract In this paper, molecular dynamics simulations have been employed to investigate the phonon thermal transport in bilayer polycrystalline graphene nanoribbon (pGNR/pGNR), compared with bilayer graphene nanoribbon (GNR/GNR) and pGNR/GNR heterostructure. The interfacial thermal resistance (ITR) of bilayer structures was also calculated using the heat dissipation method. The effects of interlayer interaction, grain size, and vacancy defects on ITR and in-plane phonon thermal conductivity of bilayer structures were investigated. It was found that the ITR as well as in-plane phonon thermal conductivity of pGNR/pGNR was less than that of pGNR/GNR and much less than that of GNR/GNR, for the same size. For the studied bilayer structures, both the ITR and in-plane phonon thermal conductivity decrease with increasing interlayer interactions. Moreover, ITR increases with increasing grain area size whereas decreases with increasing vacancy defects in pGNR-based bilayers. The introduction of pGNR interface roughness and vacancy defects results in an enhanced phonon coupling in pGNR-based bilayers compared to pure GNR/GNR bilayers. Presented simulation investigations will help to understand the interlayer thermal transport properties of polycrystalline graphene and provide essential guidance for experimentally regulating phonon thermal transport between layers of polycrystalline graphene.
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- 2024
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3. Theoretical interpretation of the $$\Xi (1620)$$ Ξ ( 1620 ) and $$\Xi (1690)$$ Ξ ( 1690 ) resonances seen in $$\Xi _c^+ \rightarrow \Xi ^- \pi ^+ \pi ^+$$ Ξ c + → Ξ - π + π + decay
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Hai-Peng Li, Gong-Jie Zhang, Wei-Hong Liang, and E. Oset
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Astrophysics ,QB460-466 ,Nuclear and particle physics. Atomic energy. Radioactivity ,QC770-798 - Abstract
Abstract We study the Belle reaction $$\Xi _c^+ \rightarrow \Xi ^- \pi ^+ \pi ^+$$ Ξ c + → Ξ - π + π + looking at the mass distribution of $$\pi ^+ \Xi $$ π + Ξ , where clear signals for the $$\Xi (1620)$$ Ξ ( 1620 ) and $$\Xi (1690)$$ Ξ ( 1690 ) resonances are seen. These two resonances are generated dynamically from the interaction in coupled channels of $$\pi \Xi , {\bar{K}} \Lambda , {\bar{K}} \Sigma $$ π Ξ , K ¯ Λ , K ¯ Σ and $$\eta \Xi $$ η Ξ within the chiral unitary approach. Yet, the weak decay process at the quark level, together with the hadronization to produce pairs of mesons, does not produce the $$\pi \pi \Xi $$ π π Ξ final state. In order to produce this state one must make transitions from the $${\bar{K}} \Lambda , {\bar{K}} \Sigma $$ K ¯ Λ , K ¯ Σ and $$\eta \Xi $$ η Ξ components to $$\pi \Xi $$ π Ξ , and this interaction is what produces the resonances. So, the reaction offers a good test for the molecular picture of these resonances. Adding the contribution of the $$\Xi ^*(1530)$$ Ξ ∗ ( 1530 ) and some background we are able to get a good reproduction of the mass distribution showing the signatures of the two resonances as found in the experiment.
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- 2023
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4. Convenient Conformal Transmissive Metasurface Antenna Embedded on Arbitrary Cylindrical Surface
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Kai-Yue Liu, Na-E Zheng, Hai-Peng Li, Teng-Yao Li, and Tong Cai
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arbitrary cylindrical surface ,conformal antenna ,metasurfaces ,Applied optics. Photonics ,TA1501-1820 ,Optics. Light ,QC350-467 - Abstract
Conformal metasurface antenna embedded on the platform with an arbitrary shape is of great significance for communication systems in practical applications. Herein, a convenient design strategy for conformal transmissive metasurface antenna with arbitrary cylinder surface is presented. First, a novel‐phase compensation concept for curved surface is inspired by ray‐tracing technique. Then, by using arc differentiation and numerical integration, the meta‐atoms’ coordinates calculation method is analyzed for arbitrary cylindrical surface. Next, the electromagnetic responses of planar and curved transmissive meta‐atoms are discussed, and conformal metasurfaces in single‐quadratic surfaces are simulated to validate the feasibility of the design strategy. Finally, for potential applications, three combined quadratics conformal metasurface antennas with capabilities of beam focusing, beam deflecting, and vortex generation are designed and measured. It is indicated in the results that the three conformal metasurface antennas with combined quadratic cylinder surfaces can transform the spherical wave efficiently into the plane wave, deflected beam, and vortex beam, respectively, verifying the validity of the designs. The convenient strategy has good generality and flexibility because it is applicable to arbitrary cylindrical metasurface with a specific alignment function, which has promising perspective in practical applications, and offers a novel approach to design conformal antennas without changing aerodynamic shapes of platforms.
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- 2023
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5. Platelet-derived microvesicles deliver miR-30e and promote VSMC apoptosis after balloon injury
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Zi-Tong, Li, Yuan-Xiu, Chen, Han, Bao, Ji-Ting, Liu, Fei, Zhuang, Hai-Peng, Li, Qing-Ping, Yao, Zong-Lai, Jiang, and Ying-Xin, Qi
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- 2022
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6. Reconfigurable Folded Transmitarray Antenna With Low-Profile Based on Metasurfaces
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Tang-Jing Li, Guang-Ming Wang, Wen-Long Guo, Ke-Wei Xin, Jia-Qi Han, and Hai-Peng Li
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Electrical and Electronic Engineering - Published
- 2023
7. Analysis and Design of a Broadband Metasurface- Based Vortex Beam Generator.
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Wenlong Guo, Guang-Ming Wang, Hai-Peng Li, Hai-Sheng Hou, and He-Xiu Xu
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- 2019
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8. High-Performance and Ultra-Broadband Metamaterial Absorber Based on Mixed Absorption Mechanisms.
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Can-Yu Wang, Jian-Gang Liang, Tong Cai, Hai-Peng Li, Wen-Ye Ji, Qing Zhang, and Cheng-Wu Zhang
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- 2019
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9. Multifunctional Full-Space Metasurface With Complete Polarization Control.
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Chi-Ben Zhang, Guang-Ming Wang, Hai-Peng Li, Xin Zhang, Xiao-Jun Zou, Wen-Ye Ji, and Can-Yu Wang
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- 2019
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10. Analysis and Design of a Broadband Metasurface- Based Vortex Beam Generator
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Wen-Long Guo, Guang-Ming Wang, Hai-Peng Li, Hai-Sheng Hou, and He-Xiu Xu
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Metasurface ,orbital angular momentum ,conical beam ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Metasurface-based vortex beam generators are very promising and applicable to enhance transmission data capacity in wireless communication system. However, most designs to date are ceased to predict their far-field characteristic, which is actually in demand when applied to wireless communication. Here, we find for the first time a deterministic and robust strategy to fastly estimate the exact far-field patterns and gain limit of a vortex beam based on the theoretical analysis of aperture field with spiral phase profile. For verification, a broadband metasurface-based vortex-beam generator based on geometric phase is designed, numerically calculated and experimentally measured at microwave regime. Excellent agreements are observed among far-field results obtained based on the proposed method, numerical simulations and experimental measurements, firmly demonstrating the validity and correctness of the proposed strategy. Such a deterministic and robust strategy of predicting far-field characteristics of a vortex beam may pave the way for its applications in many engineering scenarios, such as conical beam design, wireless communication, et al.
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- 2019
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11. Sustainable and Robust Closed-Loop Enzymatic Platform for Continuous/Semi-continuous Synthesis of Ursodeoxycholic Acid
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Hai-Peng Li, Bing-Yi Yang, Ying Su, Zhi-Neng You, Wu-Tong Yin, Chun-Xiu Li, Gao-Wei Zheng, Jingping Qu, and Jian-He Xu
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Renewable Energy, Sustainability and the Environment ,General Chemical Engineering ,Environmental Chemistry ,General Chemistry - Published
- 2022
12. A Method for Transmitarray Antenna Profile Reduction Based on Ray Tracing Principle
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Tang-Jing Li, Guang-Ming Wang, Jian-Gang Liang, and Hai-Peng Li
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Electrical and Electronic Engineering - Published
- 2022
13. A Novel Broadband Bi-Functional Metasurface for Vortex Generation and Simultaneous RCS Reduction.
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Kai-Yue Liu, Wenlong Guo, Guang-Ming Wang, Hai-Peng Li, and Gang Liu
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- 2018
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14. Circularly Polarized Double-Folded Transmitarray Antenna Based on Receiver-Transmitter Metasurface
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Tang-Jing Li, Guang-Ming Wang, Hai-Peng Li, and Hai-Sheng Hou
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Electrical and Electronic Engineering - Published
- 2022
15. Deployment Optimization Method of Multistatic Radar for Constructing Circular Barrier Coverage
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Hai-Peng Li, Da-Zheng Feng, Shao-Feng Chen, and Ya-Peng Zhou
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multistatic radar ,circular barrier coverage ,deployment optimization ,minimum deployment cost ,deployment pattern ,Chemical technology ,TP1-1185 - Abstract
To construct circular barrier coverage (CBC) with multistatic radars, a deployment optimization method based on equipartition strategy is proposed in this paper. In the method, the whole circular area is divided into several sub-circles with equal width, and each sub-circle is blanketed by a sub-CBC that is built based on the multistatic radar deployment patterns. To determine the optimal deployment patterns for each sub-CBC, the optimization conditions are firstly studied. Then, to optimize the deployment of the whole circular area, a model based on minimum deployment cost is proposed, and the proposed model is divided into two sub-models to solve the optimization issue. In the inner model, it is assumed that the width of a sub-circle is given. Based on the optimization conditions of the deployment pattern, integer linear programming (ILP) and exhaustive method (EM) are jointly adopted to determine the types and numbers of deployment patterns. Moreover, a modified formula is introduced to calculate the maximum valid number of receivers in a pattern, thus narrowing the search scope of the EM. In the outer model, the width of a sub-circle is assumed to be a variable, and the EM is adopted to determine the minimum total deployment cost and the optimal deployment patterns on each sub-circle. Moreover, the improved formula is exploited to determine the range of width for a sub-circle barrier and reduce the search scope of the EM. Finally, simulations are conducted in different conditions to verify the effectiveness of the proposed method. The simulation results indicate that the proposed method can spend less deployment cost and deploy fewer transmitters than the state-of-the-artwork.
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- 2021
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16. Development and Standardization of a New Cognitive Assessment Test Battery for Chinese Aphasic Patients: A Preliminary Study
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Ji-Bao Wu, Zhi-Hong Lyu, Xiao-Jia Liu, Hai-Peng Li, and Qi Wang
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Aphasia ,Beijing Version of the Montreal Cognitive Assessment ,Cognitive Impairment ,Nonlanguage Cognitive-based Cognitive Assessment ,Test Battery ,Medicine - Abstract
Background: Nonlinguistic cognitive impairment has become an important issue for aphasic patients, but currently there are few neuropsychological cognitive assessment tests for it. To get more information on cognitive impairment of aphasic patients, this study aimed to develop a new cognitive assessment test battery for aphasic patients, the Non-language-based Cognitive Assessment (NLCA), and evaluate its utility in Chinese-speaking patients with aphasia. Methods: The NLCA consists of five nonverbal tests, which could assess five nonlinguistic cognitive domains such as visuospatial functions, attention test, memory, reasoning, and executive functions of aphasic patients. All tests are modified from the nonverbal items of the current existed tests with some changes to the characteristics of Chinese culture. The NLCA was tested in 157 participants (including 57 aphasic patients, 50 mild cognitive impairment (MCI) patients, and 50 normal controls), and was compared with other well-established relative neuropsychological tests on the reliability, validity, and utility. Results: The NLCA was fully applicable in the MCI patients and the normal controls, almost working in the aphasic patients (57/62 patients, 91.9%). The NLCA scores were 66.70 ± 6.30, 48.67 ± 15.04, and 77.58 ± 2.56 for the MCI group, the aphasic group, and the control group, respectively , and a significant difference was found among three groups (F = 118.446, P < 0.001). The Cronbach's alpha of the NLCA as an index of internal consistency was 0.805, and the test-retest and interrater reliability was adequate (r=0.977 and r= 0.970, respectively). The correlations of the cognitive subtests and their validation instruments were between 0.540 and 0.670 (all P < 0.05). Spearman's correlation analysis indicated that the coefficient of internal consistency of each subtest itself was higher than other subtests. When choosing the Montreal Cognitive Assessment score of
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- 2017
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17. De‐Linker‐Enabled Exceptional Volumetric Acetylene Storage Capacity and Benchmark C 2 H 2 /C 2 H 4 and C 2 H 2 /CO 2 Separations in Metal–Organic Frameworks
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Jia‐Wen Wang, Shu‐Cong Fan, Hai‐Peng Li, Xianhui Bu, Ying‐Ying Xue, and Quan‐Guo Zhai
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General Medicine ,General Chemistry ,Catalysis - Published
- 2023
18. Rational regulation of acetylene adsorption and separation for ultra-microporous copper-1,2,4-triazolate frameworks by halogen hydrogen bonds
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Hai-Peng Li, Zhao-Di Dou, Yi Xiao, Guan-Jiang Fan, Dong-Chen Pan, Man-Cheng Hu, and Quan-Guo Zhai
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General Materials Science - Abstract
A series of ultra-microporous copper(i)-1,2,4-triazolate frameworks exhibit moderate C2H2 uptake capacity, high C2H2/CO2 and C2H2/C2H4 separation ability, and remarkably lower isosteric heat of C2H2 adsorption regulated by halogen hydrogen bond.
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- 2022
19. Continuous-Flow Microreactor-Enhanced Clean NAD+ Regeneration for Biosynthesis of 7-Oxo-lithocholic Acid
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Hai-Peng Li, Zhi-Neng You, Yuan-Yang Liu, Gao-Wei Zheng, Heng Gong, Yiming Mo, Ning Zhu, Yun-Peng Bai, and Jian-He Xu
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Renewable Energy, Sustainability and the Environment ,General Chemical Engineering ,Environmental Chemistry ,General Chemistry - Published
- 2021
20. Scapular bone grafting with allograft pin fixation for repair of bony Bankart lesions: A biomechanical study
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Feng Gao, Xue-Zhen Shen, Ming Lu, Yujie Liu, Yufeng Liu, Hai-Peng Li, and Bo Hu
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musculoskeletal diseases ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,General Medicine ,Bone grafting ,Allograft bone ,musculoskeletal system ,medicine.disease ,Bankart lesion ,Surgery ,Fixation (surgical) ,surgical procedures, operative ,Retrospective Study ,medicine ,Scapular spine ,business ,Biomechanical - Abstract
BACKGROUND Severe bony Bankart lesions are a difficult challenge in clinical treatment and research. The current treatment methods consist mostly of Latarjet-Bristow surgery and its modified procedures. While good results have been achieved, there are also complications such as coracoid fracture, bone graft displacement, and vascular and nerve injury. AIM To analyze the techniques and biomechanical properties of transversely fixing a bone block from the scapular spine using bone allograft pins with suture threads to repair bony Bankart lesions. METHODS Fresh human shoulder joint specimens and a cadaver specimen model for scapular bone grafting with allograft pin fixation for repair of bony Bankart lesions were used. When the humeral rotation angles were 0°, 30°, 60° and 90°, and the axial loads were 30 N, 40 N, and 50 N, the humerus displacement was studied by biomechanical experiments. RESULTS When the angle of external rotation of the humerus was 0°, 30°, 60°, and 90°, with axial loads of 30 N, 40 N, and 50 N, the data of the normal control group, allograft pin repair group, and titanium alloy hollow screw repair group were compared with each other by the q-test, which showed that there were no statistically differences among the three groups (P > 0.05). CONCLUSION The joints repaired with bone block from the scapular spine transversely fixed with allograft bony pins to repair bony Bankart lesions show good mechanical stability. The bone block has similar properties to normal glenohumeral joints in terms of biomechanical stability.
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- 2021
21. Regioselectivity Inversion of an O ‐Methyltransferase via Semi‐rational Mutagenesis Combined with Metal Ion Substitution
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Ying Su, Hai‐Peng Li, Man Zhang, Xu‐Wei Ding, Jian‐He Xu, Qi Chen, and Gao‐Wei Zheng
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Inorganic Chemistry ,Organic Chemistry ,Physical and Theoretical Chemistry ,Catalysis - Published
- 2022
22. Differential expression of mRNA-miRNAs related to intramuscular fat content in the longissimus dorsi in Xinjiang brown cattle.
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Na Li, Yang Zhang, Hai-Peng Li, Ling Han, Xiang-Min Yan, Hong-Bo Li, Wei Du, Jin-Shan Zhang, and Qun-Li Yu
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Medicine ,Science - Abstract
In this study, we examined the role of mRNAs and miRNAs in variations in intramuscular fat content in the longissimus dorsi muscle in Xinjiang brown cattle. Two groups of Xinjiang brown cattle with extremely different intramuscular fat content in the longissimus dorsi were selected for combined of miRNA and mRNA analysis using an RNA-Seq. In total, 296 mRNAs and 362 miRNAs were significantly differentially expressed, including 155 newly predicted miRNAs, 275 significantly upregulated genes, 252 significantly upregulated miRNAs, 21 significantly downregulated genes and 110 significantly downregulated miRNAs. The combined miRNA and mRNA analysis identified 96 differentially expressed miRNAs and 27 differentially expressed mRNAs. In all, 47 upregulated miRNAs had a regulatory effect on 14 differentially downregulated target genes, and 49 downregulated miRNAs had a regulatory effect on 13 upregulated target genes. To verify the sequencing results, 10 differentially expressed genes (DEGs) and 10 differentially expressed miRNAs were selected for qRT-PCR. The qRT-PCR results confirmed the sequencing results. The results of this study shed light on the molecular regulation of bovine adipose tissue, which might help with the development of new strategies for improving meat quality and animal productivity in beef cattle to provide healthier meat products for consumers.
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- 2018
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23. Arthroscopic C‐Shaped Release Around the Greater Trochanter for Gluteal Muscle Contracture
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Zhigang Wang, Hai-Peng Li, Dong Wang, Yujie Liu, Zhongli Li, Chunbao Li, Yi Xiang, Baiqing Zhang, Xiangyu Tang, and Wei Qi
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Adult ,Male ,medicine.medical_specialty ,Greater trochanter ,Contracture ,Visual analogue scale ,Physical examination ,Gluteal muscle contracture ,Arthroscopy ,Disability Evaluation ,Young Adult ,medicine ,Humans ,Orthopedics and Sports Medicine ,Buttocks ,Muscle, Skeletal ,Gluteal muscles ,Pain Measurement ,Orthopedic surgery ,Clinical Article ,Disability ,medicine.diagnostic_test ,business.industry ,Surgery ,medicine.anatomical_structure ,Clinical Articles ,Female ,medicine.symptom ,Intramuscular injection ,business ,RD701-811 - Abstract
Objective To investigate the outcomes of C‐shaped release around the greater trochanter in gluteal muscle contracture under arthroscopy. Methods From December 2016 to January 2018, 185 patients with gluteal muscle contracture who treated under arthroscopy were reviewed, including 69 males and 116 females. All patients had a history of repeated intramuscular injection into the buttocks. The follow signs were positive in all the patients before surgery: squatting and crouching disability, difficulty in crossing the leg, Ober's sign positive, clicking sound during rotation of the hip. The C‐shaped release around the greater trochanter under arthroscopy was performed in 96 cases (C‐shaped release group) with an average age of 24.6 ± 4.9 years old, and conventional gluteal muscle contracture release under arthroscopy was performed in 89 cases (conventional release group) with an average age of 25.1 ± 5.0 years. The released tissues in the C‐shaped release group: iliotibial band (ITB) about 5 cm distal to the proximal end of the greater trochanter, the contracture tissue near the posterior and superior of the greater trochanter, which depended on both intraoperative physical examination and arthroscopic observation. The released tissues in conventional release group: the contracture tissues in gluteal muscles according to observation under arthroscopy. The gluteal muscle contracture disability scale (GDS) and Visual analogue scale (VAS) were evaluated before surgery and at the last follow‐up. Results The average release time after making arthroscopic operation space for each lower limb were 12.2 ± 3.2 min in the C‐shaped release group, and 21.4 ± 6.1 min in the conventional release group (P = 0.000). All the patients were followed for at least of 2 years after operation. There was one case of wound hematoma in the C‐shaped release group and five cases in the conventional release group(P = 0.079), abductor weakness (IV level)occurred in two patients in the C‐shaped release group and five cases in the conventional release group (P = 0.208). GDS was 49.3 ± 17.3 (22 to 70) in theC‐shaped release group and 48.1 ± 15.6 (23 to 69) in the conventional release group before surgery (P = 0.622), 91.7 ± 5.2 (83 to 100) in the C‐shaped release group and 90.2 ± 6.1 (83 to 98) in the conventional release group (P = 0.073) with difference nearly significant at last follow‐up. Conclusion Arthroscopic C‐shaped release around the greater trochanter had less operation time, acceptable complication occurrence, and it has an optimistic outcome for gluteal muscle contracture under arthroscope., The target area of arthroscopic C‐shaped release was formed by the iliotibial band tissue 5 cm distal to the proximal end of the greater trochanter (A), the contracture tissue nearly posterior (B) and superior (C) of the greater trochanter.
- Published
- 2021
24. Dynamic analysis of microparticle behavior in quad-beam optic-fiber optical tweezers
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Yong Zhao, Hai-peng Li, Cheng-liang Zhu, and Sheng Hu
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Physics ,Angular momentum ,Optical fiber ,business.industry ,Physics::Optics ,Optical field ,Rotation ,Ray ,Atomic and Molecular Physics, and Optics ,law.invention ,Vortex ,Optics ,Optical tweezers ,law ,business ,Beam (structure) - Abstract
In recent year, optic-fiber optical tweezers were considered as a valuable manipulated tool, allowing for trapping and sorting numerous interest microparticles in biological and microfluidic application. Especially for dual optic-fiber array with misalignment, vortex optical field can be utilized to cause particle realizing periodic orbital rotation, contributing to measure unknown parameters such as torque, viscosity, and angular momentum. Yet, this optic-fiber array with several misalignments creating more vortex fields remains an interesting work for a large range of microparticle trapping and rotation. Therefore, motion profiles of particle exerting by four optic-fibers forming quad-beam were studied by changing offset distance in our numerical model. Compared to dual beam, the array of such four optic-fibers has much more controllable variables, reflecting the asymmetric radial distance relevant to particle. Herein, these motion characteristics relevant to microparticle have been simulated based on ray optics approximation. Finally, dynamic simulations imply that quad-beam can generate two or more vortexes inducing particle to move in orbital rotation, which have revealed different rotational radius, direction, and velocity. As a results, this optic-fiber array may be readily implemented in cellular trapping and manipulation, exploring biophysical properties of different types of cell.
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- 2021
25. Engineering Isopropanol Dehydrogenase for Efficient Regeneration of Nicotinamide Cofactors
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Qiao Jia, Yu-Cong Zheng, Hai-Peng Li, Xiao-Long Qian, Zhi-Jun Zhang, and Jian-He Xu
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2-Propanol ,Niacinamide ,Ecology ,Regeneration ,Enzymology and Protein Engineering ,NAD ,Formate Dehydrogenases ,Applied Microbiology and Biotechnology ,NADP ,Food Science ,Biotechnology - Abstract
Isopropanol dehydrogenase (IPADH) is one of the most attractive options for nicotinamide cofactor regeneration due to its low cost and simple downstream processing. However, poor thermostability and strict cofactor dependency hinder its practical application for bioconversions. In this study, we simultaneously improved the thermostability (433-fold) and catalytic activity (3.3-fold) of IPADH from Brucella suis via a flexible segment engineering strategy. Meanwhile, the cofactor preference of IPADH was successfully switched from NAD(H) to NADP(H) by 1.23 × 10(6)-fold. When these variants were employed in three typical bioredox reactions to drive the synthesis of important chiral pharmaceutical building blocks, they outperformed the commonly used cofactor regeneration systems (glucose dehydrogenase [GDH], formate dehydrogenase [FDH], and lactate dehydrogenase [LDH]) with respect to efficiency of cofactor regeneration. Overall, our study provides two promising IPADH variants with complementary cofactor specificities that have great potential for wide applications. IMPORTANCE Oxidoreductases represent one group of the most important biocatalysts for synthesis of various chiral synthons. However, their practical application was hindered by the expensive nicotinamide cofactors used. Isopropanol dehydrogenase (IPADH) is one of the most attractive biocatalysts for nicotinamide cofactor regeneration. However, poor thermostability and strict cofactor dependency hinder its practical application. In this work, the thermostability and catalytic activity of an IPADH were simultaneously improved via a flexible segment engineering strategy. Meanwhile, the cofactor preference of IPADH was successfully switched from NAD(H) to NADP(H). The resultant variants show great potential for regeneration of nicotinamide cofactors, and the engineering strategy might serve as a useful approach for future engineering of other oxidoreductases.
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- 2022
26. Finite element analysis and experimental study on contact pressure of hydraulic support bud-shaped composite sealing ring
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Xi Zhang, Gang Wang, Peng Xia, Hai-Peng Li, and Ming He
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Mechanical engineering and machinery ,TJ1-1570 - Abstract
By the fluid dynamics theory analysis of the sealing interface, the importance of sealing contact pressure research for sealing performance is discussed. By experiments and data analysis for nitrile rubber buna and polyurethane, Mooney–Rivlin model parameters of two materials are obtained. By the finite element analysis of bud-shaped composite sealing ring under different pressures and secondary analysis, sealing contact pressure distribution curve of finite element analysis has been obtained. Sealing experimental apparatus is designed and assembled. The contact pressure distribution curve and three-dimensional pressure distribution field are obtained using the pressure-sensitive film. The results from finite element analysis and experiment are consistent with the conclusion of fluid dynamics theory analysis. The research content and design have great significance for sealing mechanism study.
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- 2016
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27. Regulation on Topological Architectures and Gas Adsorption for Cadmium-Azolate-Carboxylate Frameworks by the Ligand Flexibility
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Quan-Guo Zhai, Hua-Ming Sun, Yucheng Jiang, Shu-Ni Li, Ying Wang, Ying-Ying Xue, Hai-Peng Li, and Mancheng Hu
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chemistry.chemical_classification ,Flexibility (engineering) ,Cadmium ,010405 organic chemistry ,Chemistry ,Ligand ,fungi ,chemistry.chemical_element ,General Chemistry ,010402 general chemistry ,Condensed Matter Physics ,01 natural sciences ,Combinatorial chemistry ,0104 chemical sciences ,chemistry.chemical_compound ,Adsorption ,Azole ,General Materials Science ,Carboxylate - Abstract
Metal-azolate-carboxylate frameworks have great potential for gas adsorption applications because azole ligands with a small size easily construct small pore MOFs with bare −N(H) donor sites. Howev...
- Published
- 2021
28. Hybrid phase compensation method for ultrathin folded transmitarray antenna
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Tang-Jing Li, Guang-Ming Wang, Dan Liu, Bin Zheng, Hai-Peng Li, and Tong Cai
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Electrical and Electronic Engineering - Published
- 2023
29. Central pontine myelinolysis: analysis of six cases
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Zhi-hua KUANG and Hai-peng LI
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Myelinolysis, central pontine ,Glucocorticoids ,Drug therapy ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
This paper analyzed clinical data of 6 patients with central pontine myelinolysis (CPM). Among them 4 cases were male, 2 cases were female, with age 24 to 55 years old and average age 36 years old. Serious somatic diseases occured in all 6 cases. The main clinical manifestations included disturbance of consciousness, pseudobulbar paralysis and flaccid paralysis. Cranial MRI showed all of the patients appeared symmetrical lesions in central pontine. After intravenous drip of glucocorticoids, 5 patients were improved. DOI: 10.3969/j.issn.1672-6731.2015.08.013
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- 2015
30. Tuning the Pore Surface of an Ultramicroporous Framework for Enhanced Methane and Acetylene Purification Performance
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Yucheng Jiang, Hai-Peng Li, Quan-Guo Zhai, Shu-Ni Li, Mancheng Hu, Ying Wang, Yong Peng Li, Zhaodi Dou, and Ying Ying Xue
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chemistry.chemical_classification ,010405 organic chemistry ,Chemistry ,010402 general chemistry ,01 natural sciences ,Methane ,0104 chemical sciences ,Inorganic Chemistry ,Metal ,chemistry.chemical_compound ,Adsorption ,Dicarboxylic acid ,Acetylene ,Chemical engineering ,visual_art ,visual_art.visual_art_medium ,Lewis acids and bases ,Physical and Theoretical Chemistry ,Energy source ,Selectivity - Abstract
Both methane (CH4) and acetylene (C2H2) are important energy source and raw chemicals in many industrial processes. The development of an energy-efficient and environmentally friendly separation and purification strategy for CH4 and C2H2 is necessary. Ultramicroporous metal-organic framework (MOF) materials have shown great success in the separation and purification of small-molecule gases. Herein, the synergy effect of tritopic polytetrazolate and ditopic terephthalate ligands successfully generates a series of isoreticular ultramicroporous cadmium tetrazolate-carboxylate MOF materials (SNNU-13-16) with excellent CH4 and C2H2 purification performance. Except for the uncoordinated tetrazolate N atoms serving as Lewis base sites, the pore size and pore surface of MOFs are systematically engineered by regulating dicarboxylic acid ligands varying from OH-BDC (SNNU-13) to Br-BDC (SNNU-14) to NH2-BDC (SNNU-15) to 1,4-NDC (SNNU-16). Benefiting from the ultramicroporous character (3.8-5.9 A), rich Lewis base N sites, and tunable pore environments, all of these ultramicroporous MOFs exhibit a prominent separation capacity for carbon dioxide (CO2) or C2 hydrocarbons from CH4 and C2H2. Remarkably, SNNU-16 built by 1,4-NDC shows the highest ideal adsorbed solution theory CO2/CH4, ethylene (C2H4)/CH4, and C2H2/CH4 separation selectivity values, which are higher than those of most famous MOFs with or without open metal sites. Dynamic breakthrough experiments show that SNNU-16 can also efficiently separate the C2H2/CO2 mixtures with a gas flow rate of 4 mL min-1 under 1 bar and 298 K. The breakthrough time (18 min g-1) surpasses most best-gas-separation MOFs and nearly all other metal azolate-carboxylate MOF materials under the same conditions. The above prominently CH4 and C2H2 purification abilities of SNNU-13-16 materials were further confirmed by the Grand Canonical Monte Carlo (GCMC) simulations.
- Published
- 2020
31. WIDEBAND RCS REDUCTION OF HIGH GAIN FABRY-PEROT ANTENNA EMPLOYING A RECEIVER-TRANSMITTER METASURFACE
- Author
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Ya-Wei Wang, Hai-Peng Li, Guang-Ming Wang, Binfeng Zong, and Peng Xie
- Subjects
Physics ,Reduction (complexity) ,High-gain antenna ,Radiation ,Optics ,business.industry ,Transmitter ,Electrical and Electronic Engineering ,Antenna (radio) ,Wideband ,Condensed Matter Physics ,business ,Fabry–Pérot interferometer - Published
- 2020
32. Research on Key Technology of Auto-driving Based on Machine Vision
- Author
-
bo chuan, Zhang, primary, Guo ming, Liu, additional, Sheng wang, Pei, additional, li, Yu, additional, and Hai peng, Li, additional
- Published
- 2021
- Full Text
- View/download PDF
33. Mimic of Ferroalloy To Develop a Bifunctional Fe–Organic Framework Platform for Enhanced Gas Sorption and Efficient Oxygen Evolution Electrocatalysis
- Author
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Ying-Ying Xue, Jian-Wei Zhang, Yong-Peng Li, Hai-Peng Li, Yucheng Jiang, Quan-Guo Zhai, Mancheng Hu, Shu-Ni Li, and Ying Wang
- Subjects
Tafel equation ,Materials science ,Oxygen evolution ,Ferroalloy ,02 engineering and technology ,Overpotential ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Catalysis ,chemistry.chemical_compound ,Adsorption ,chemistry ,Chemical engineering ,General Materials Science ,Gas separation ,0210 nano-technology ,Bifunctional - Abstract
It is well-known that the formation of ferroalloy with the addition of the second or third metal during the steel-making process usually can improve the performance of the iron. Inspired by ferroalloy materials, it is speculated that the pore environment, framework charge, and catalytic properties of metal-organic frameworks (MOFs) could be optimized dramatically via the introduction of ferroalloy-like inorganic building blocks. However, different to ferroalloy, the accurate integration of different metals into one MOF platform is still challenging. Herein, taking advantages of the good compatibility for metals in trigonal prismatic trinuclear cluster, a series of Fe-based alloy-like [M3O(O2C)6] motifs (M3 = Fe3, Fe1.5Ni1.5, Fe1.5Co1.5, Fe1.5Ti1.5, FeCoNi, and FeTiCo) are successfully generated, which further lead to a robust Fe-MOF material family (SNNU-5s). These multicomponent MOFs not only provide a good chance to explore the impact of pore environment on gas adsorption/separation but also offer an opportunity to the efficient electrocatalytic reaction directly. Accordingly, compared with the SNNU-5-Fe parent structure, the pore characters of heterometallic SNNU-5 MOFs are clearly regulated by the type of alloy-like building blocks. SNNU-5-FeTi displays more superior gas separation performance for CO2/CH4, C2H2/CH4, C2H4/CH4, and C2H2/CO2 gas mixtures. What is more, benefited from the multimetallic active sites and their catalytic synergy, FeCoNi-ternary alloy-like cluster-based SNNU-5 MOF material exhibits an exceptional oxygen evolution reaction activity in aqueous solution at pH = 13, which delivers a low overpotential (ηj=10 = 317 mV), a fast reaction kinetics (Tafel slope = 37 mV dec-1), and excellent catalytic stability. This facile multialloy-like building block strategy holds promise to accurately design and improve the performance of MOFs, as well as open an avenue to understand the related mechanisms.
- Published
- 2019
34. Amide-Functionalized Metal-Organic Frameworks Coupled with Open Fe/Sc Sites for Efficient Acetylene Purification
- Author
-
Ying-Ying Xue, Quan-Guo Zhai, Hai-Peng Li, Shu-Ni Li, Ying Wang, Jia-Wen Wang, Shu-Cong Fan, and Yun-Tong Li
- Subjects
Inorganic Chemistry ,chemistry.chemical_compound ,Adsorption ,Acetylene ,chemistry ,Amide ,Inorganic chemistry ,Molecule ,Metal-organic framework ,Physical and Theoretical Chemistry ,Isostructural ,Selectivity ,Tricarboxylate - Abstract
Acetylene (C2H2) purification is of great importance for many chemical synthesis and processes. Metal-organic frameworks (MOFs) are widely used for gas adsorption and separation due to their variable structure and porosity. However, the exploitation of ideal MOF adsorbents for C2H2 keeps a challenging task. Herein, a combination of open metal sites (OMSs) and Lewis basic sites (LBSs) in robust MOFs is demonstrated to effectively promote the C2H2 purification performance. Accordingly, SNNU-37(Fe/Sc), two isostructural MOFs constituted by [Fe3O(COO)6] or [Sc3O(COO)6] trinuclear clusters and amide-functionalized tricarboxylate linkers, were designed with extra-stable 3,6-connected new architectures. Derived from the coexistence of high-density OMSs and LBSs, the C2H2 adsorption amounts of SNNU-37(Fe/Sc) are much higher than those values for C2H4 and CO2. Theoretical IAST selectivity values of SNNU-37(Fe) are 2.4 for C2H2/C2H4 (50/50, v/v) and 9.9 for C2H2/CO2 (50/50, v/v) at 298 K and 1 bar, indicating an excellent C2H2 separation ability. Experimental breakthrough curves also revealed that SNNU-37(Fe) could effectively separate C2H2/C2H4 and C2H2/CO2 under ambient conditions. GCMC simulations further indicate that open Fe or Sc sites and amide groups mainly contribute to stronger adsorption sites for C2H2 molecules.
- Published
- 2021
35. Study on the mechanism of flotation of coal gasification fine slag reinforced with naphthenic acids
- Author
-
Zhong-Hua Xue, Lian-Ping Dong, Hai-peng Li, Min-Qiang Fan, Zhen-Yang Ren, An Liu, Pan-Pan Fan, and Wei-Ren Bao
- Subjects
Fuel Technology ,General Chemical Engineering ,Organic Chemistry ,Energy Engineering and Power Technology - Published
- 2022
36. MicroRNA-135b alleviates MPP+-mediated Parkinson’s disease in in vitro model through suppressing FoxO1-induced NLRP3 inflammasome and pyroptosis
- Author
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Rong Zeng, Di-Xian Luo, Hai-Peng Li, Sheng-Suo Lei, Qi-Shan Zhang, and Ji-Hua Chen
- Subjects
Parkinson's disease ,business.industry ,Pyroptosis ,Caspase 1 ,Inflammasome ,FOXO1 ,General Medicine ,medicine.disease ,Cell biology ,03 medical and health sciences ,0302 clinical medicine ,Neurology ,Downregulation and upregulation ,030220 oncology & carcinogenesis ,Physiology (medical) ,microRNA ,medicine ,Surgery ,Neurology (clinical) ,business ,030217 neurology & neurosurgery ,TXNIP ,medicine.drug - Abstract
The present study focused on the novel roles and the underlying mechanisms of miR-135b in pyroptosis of MPP+-induced Parkinson's disease (PD). We established an in vitro PD model induced by MPP+. Our results demonstrated miR-135b was lower while FoxO1 was inversely higher in MPP+-treated SH-SY5Y and PC-12 cells. Luciferase reporter assay showed FoxO1 was a downstream target of miR-135b. MiR-135b mimics suppressed MPP+-induced pyroptosis and the upregulation of TXNIP, NLRP3, Caspase-1, ASC, GSDMDNterm and IL-1β. Moreover, FoxO1 overexpression had no effect on miR-135b but reversed its own downregulation caused by miR-135b mimics. Meanwhile, overexpression of FoxO1 abolished the inhibitory effects of miR-135b on pyroptosis and reversed the downregulation of pyroptotic genes and LDH release. In summary, miR-135b played a protective role in Parkinson's disease via inhibiting pyroptosis by targeting FoxO1. MiR-135b might serve as a potential therapeutic target in the treatment of Parkinson's disease.
- Published
- 2019
37. An Efficient Decoupling Network Between Feeding Points for Multielement Linear Arrays
- Author
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Guang-Ming Wang, Xiao-Jun Zou, Ya-Wei Wang, and Hai-Peng Li
- Subjects
Physics ,Impedance matching ,020206 networking & telecommunications ,02 engineering and technology ,Radiation ,Topology ,Antenna array ,Electric power transmission ,Transmission line ,0202 electrical engineering, electronic engineering, information engineering ,Electrical and Electronic Engineering ,Monopole antenna ,Decoupling (electronics) ,Network analysis - Abstract
Strong mutual coupling between both adjacent and nonadjacent elements is unavoidable, especially when antenna array is densely arranged. In this paper, an efficient T-shaped decoupling network is primarily proposed to decouple closely spaced two-element E-plane antenna array based on network analysis and implementation deduction. Subsequently, it is extended to a three-element one by combining with a fine transmission line and further generalized to a multielement linear one. All the accordant simulation and measurement results demonstrate that as compared to the coupled arrays, impedance matching, radiation patterns, and scanning characteristics of the decoupled arrays are evidently improved through adding the decoupling network, while mutual coupling between every two elements is greatly reduced. Moreover, such combined decoupling network is effective in the H-plane array and monopole antenna array, implying its huge potential for large-scale array and various arrays.
- Published
- 2019
38. Prediction of cancer drugs by chemical-chemical interactions.
- Author
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Jing Lu, Guohua Huang, Hai-Peng Li, Kai-Yan Feng, Lei Chen, Ming-Yue Zheng, and Yu-Dong Cai
- Subjects
Medicine ,Science - Abstract
Cancer, which is a leading cause of death worldwide, places a big burden on health-care system. In this study, an order-prediction model was built to predict a series of cancer drug indications based on chemical-chemical interactions. According to the confidence scores of their interactions, the order from the most likely cancer to the least one was obtained for each query drug. The 1(st) order prediction accuracy of the training dataset was 55.93%, evaluated by Jackknife test, while it was 55.56% and 59.09% on a validation test dataset and an independent test dataset, respectively. The proposed method outperformed a popular method based on molecular descriptors. Moreover, it was verified that some drugs were effective to the 'wrong' predicted indications, indicating that some 'wrong' drug indications were actually correct indications. Encouraged by the promising results, the method may become a useful tool to the prediction of drugs indications.
- Published
- 2014
- Full Text
- View/download PDF
39. Design of ultra-stable Yttrium-organic framework adsorbents for efficient methane purification and storage
- Author
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Jie Xu, Hong-Juan Lv, Ying-Ying Xue, Shu-Ni Li, Ying Wang, Hai-Peng Li, Quan-Guo Zhai, Jiao Lei, and Peng Zhang
- Subjects
Materials science ,chemistry.chemical_element ,Filtration and Separation ,Yttrium ,Methane ,Analytical Chemistry ,chemistry.chemical_compound ,Adsorption ,chemistry ,Chemical engineering ,TATB ,SBus ,Isostructural ,Benzene ,Selectivity - Abstract
As a cleaner, cheaper and globally distributed fuel, methane (CH4) has considerable environmental, economic, and political advantages over petroleum as a source of energy for the transportation sector. However, it is still challenging to achieve efficient CH4 purification from CO2 or C2-hydrocarbons and its following storage for practical application, where the design of high-performance adsorbent materials is critical. Here we report two isostructural ultra-stable double-interpenetrated yttrium-based metal-organic frameworks (MOFs), SNNU-324 and SNNU-325, which are rationally designed by a topology-guided strategy with 1,3,5-tris(4-carboxyphenyl)benzene (BTB) and 2,4,6-tris(4-carboxyphenyl)- 1,3,5-triazine (TATB) as tritopic linkers and [Y3(OH)2(H2O)4(COO)8] and [Y4O2(H2O)4(COO)8] clusters as secondary building units (SBUs), respectively. Notably, thanks to the high-connectivity and double-interpenetrated architectures, SNNU-324-325 MOFs exhibit extra-high thermal, water and pH stability. Low-pressure gas adsorption, IAST selectivity and breakthrough curves reveal a remarkable CO2/C2-hydrocarbons over CH4 separation performance of SNNU-324 and SNNU-325. In particular, the breakthrough interval times can reach up to 20, 45, 38, and 61 min g-1 for CO2/CH4, C2H2/CH4, C2H4/CH4 and C2H6/CH4 with 2 mL min-1 for SNNU-325 at 298 K, which exceed most well-known MOF adsorbents. High-pressure gas uptake experiments further indicate SNNU-324 and SNNU-325 are promising CH4 storage adsorbents. Specially, at room temperature, SNNU-325 exhibits a total CH4 uptake of 120 cm3 cm−3 under 35 bar and deliver capacity of 65/78 cm3 cm-3 under 35/65 bar, which are comparable with most top-level methane storage MOFs.
- Published
- 2022
40. [Research progress on the epigenetic mechanisms of inverse relationship between Alzheimer's disease and cancer onset]
- Author
-
Wen-Zhen, Xia, Hai-Peng, Li, and Shun-Jiang, Xu
- Subjects
Alzheimer Disease ,Neoplasms ,Humans ,Neurodegenerative Diseases ,Neurofibrillary Tangles ,Aged ,Epigenesis, Genetic - Abstract
Alzheimer's disease (AD) is currently the most prevalent neurodegenerative disease in the aging population. It is characterized by massive deposition of extracellular β-amyloid peptide and formation of intracellular neurofibrillary tangles. Cancer is also an age-related disease. Some epidemiological studies have shown an inverse relationship between AD and the onset of various types of cancers, that is, the risk of cancer in patients with AD is reduced, and vice versa. Epigenetic mechanisms play important roles in the development of AD and cancer. In this article, we will review the recent research advances on the epigenetic mechanisms of AD and cancer onset, and provide new ideas for rethinking the relevance of AD and cancer with a "holistic concept".
- Published
- 2020
41. Decreased lncRNA SNHG16 Accelerates Oxidative Stress Induced Pathological Angiogenesis in Human Retinal Microvascular Endothelial Cells by Regulating miR-195/mfn2 Axis
- Author
-
Nan Zhang, Huimin Zhou, Hai-Peng Li, Na Zhao, Shunjiang Xu, Lei Jiang, Wenzhen Xia, Xiaoying Ma, Ximing Cui, and Rui Zhang
- Subjects
Angiogenesis ,MFN2 ,Apoptosis ,medicine.disease_cause ,Umbilical vein ,Retina ,GTP Phosphohydrolases ,Mitochondrial Proteins ,chemistry.chemical_compound ,Downregulation and upregulation ,Drug Discovery ,medicine ,Human Umbilical Vein Endothelial Cells ,Humans ,Cell Proliferation ,Pharmacology ,Neovascularization, Pathologic ,Retinal ,Hydrogen Peroxide ,Long non-coding RNA ,Cell biology ,Endothelial stem cell ,MicroRNAs ,Oxidative Stress ,chemistry ,RNA, Long Noncoding ,Oxidative stress - Abstract
Background: This study was performed to identify the alterations of Long non-coding RNAs (lncRNAs) induced by oxidative stress and investigate the functional roles of SNHG16 in the pathological angiogenesis by human retinal microvascular endothelial cells (HMRECs). Methods: The expression profiles of lncRNAs and mRNAs induced by oxidative stress were identified by RNA-Seq, and the dysregulation of 16 lncRNAs including SNHG16 was verified in H2O2-treated human umbilical vein endothelial cells (HUVECs). Luciferase reporter assay and RIP analysis were used to investigate the binding relationship of SNHG16 to miR-195. Results: We confirmed that over-expression of SNGH16 attenuated H2O2-induced angiogenesis by HMRECs. In addition, SNHG16 was significantly decreased, whereas miR-195, a predictive target of SNHG16, was upregulated in H2O2, HG, and AGE-treated HMRECs. The binding relationship of SNHG16 to miR-195 was subsequently verified by luciferase reporter assay and RIP analysis. SNHG16 cotransfection abolished miR-195-mediated repression on mitofusin 2 (mfn2) protein level and counteracted the inductive effect of miR-195 on angiogenesis by HMRECs. Conclusion: These results indicated that decreased SNHG16 accelerates oxidative stress-induced pathological angiogenesis in HMRECs by regulating the miR-195/mfn2 axis, providing a potential target for diabetic retinopathy (DR) therapy.
- Published
- 2020
42. Multimetal Incorporation into 2D Conductive Metal-Organic Framework Nanowires Enabling Excellent Electrocatalytic Oxidation of Benzylamine to Benzonitrile
- Author
-
Quan-Guo Zhai, Meng Li, Shu-Ni Li, Ying Wang, Yong-Peng Li, Liting Yan, En-Hui Yuan, Ying-Ying Xue, and Hai-Peng Li
- Subjects
Reaction mechanism ,Materials science ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,Redox ,0104 chemical sciences ,Catalysis ,chemistry.chemical_compound ,Benzonitrile ,Benzylamine ,chemistry ,Chemical engineering ,Reversible hydrogen electrode ,General Materials Science ,Metal-organic framework ,0210 nano-technology - Abstract
As an important organic intermediate, benzonitrile (BN) is widely involved in organic synthetic chemistry and pharmaceutical and dyestuff industries. However, the exploration of a more efficient and controllable synthesis technique and the corresponding greener catalysts for the synthesis of BN still poses a great challenge. Herein, with multimetallic two-dimensional conductive metal-organic frameworks (2D cMOF) as anodic electrocatalysts, we develop a green, convenient, and highly efficient electrochemical synthesis strategy for BN. Thanks to the intrinsic 2D electrically conductive structure and the optimized the multimetallic coupling catalytic effect, the resulting multimetallic 2D cMOFs exhibit excellent benzylamine (BA) electrooxidation performance. Especially, the trimetallic 2D cMOF (NiCoFe-CAT) requires an ultralow potential of 1.29 V vs reversible hydrogen electrode (RHE) to achieve a 10 mA·cm-2 current density, which indicates the fastest reaction and the most favorable thermodynamic condition. A very high yield (0.058 mmol·mg-1·h-1) and faradic efficiency (∼87%) of benzonitrile are both achieved during the BA electrooxidation reaction at 1.45 V. The reaction mechanism investigations indicated that the various redox mediators of MII/MIII (Ni, Co, Fe) may be regarded as multimetal active species to promote BA conversion. Also, the excellent cycling durability of multimetallic 2D cMOFs further promotes their potential practical applications. These electrocatalytic performances are considered excellent and nearly surpass all other reported Ni-based inorganics or MOF-based electrocatalysts for the electrocatalytic oxidation of benzylamine.
- Published
- 2020
43. Removal of Popliteal Cyst Under Endoscopy
- Author
-
Hai-peng Li and Yu-jie Liu
- Subjects
musculoskeletal diseases ,Popliteal cyst ,medicine.medical_specialty ,Popliteal fossa ,business.industry ,Osteoarthritis ,Meniscus (anatomy) ,Knee Joint ,medicine.disease ,Surgery ,medicine.anatomical_structure ,Synovitis ,parasitic diseases ,medicine ,Cyst ,Local anesthesia ,business - Abstract
The pathogenesis of popliteal cyst (Baker’s cyst) is related to meniscus injury, knee osteoarthritis, and synovitis. The cyst is common connected with the joint cavity, and it can be touched at the popliteal fossa. When the synovial fluid exudates more in the knee joint, it can flow into the popliteal cyst through the passage. The cyst can shrink when patient lies on prone position. Large cysts may affect the movement of the knee joint, and sometimes it even compress the blood vessels or nerves behind the knee, causing local swelling pain, numbness of the foot, or other neurological symptoms. The traditional treatment of popliteal cyst is open surgery. Because of the abundant blood vessels and nerves in popliteal area, and the location of the cyst is deep and difficult to expose, the incision is always long, and the trauma is large. The scar after surgery not only affects the beauty but also affects the function of knee joint. The recurrence rate of popliteal cyst after resection is high (Fig. 8.1). The author removed the popliteal cyst under endoscopy with local anesthesia and received good results.
- Published
- 2020
44. Anterior Cruciate Ligament Reconstruction with Remnant-Preserving Technique
- Author
-
Yu-jie Liu and Hai-peng Li
- Subjects
musculoskeletal diseases ,Posterolateral bundle ,Anterior cruciate ligament reconstruction ,business.industry ,medicine.medical_treatment ,food and beverages ,Medicine ,Anatomy ,Knee Joint ,musculoskeletal system ,business ,human activities ,Anteromedial bundle - Abstract
ACL is divided into anteromedial bundle (AMB) and posterolateral bundle (PLB) (Fig. 21.1). The anteromedial bundle (AMB) can resist the tibial forward movement during the flexion of the knee joint, and the posterolateral bundle (PLB) can stabilize the knee joint during the extension position. The stability of knee joint will be affected by partial or complete injury of ACL.
- Published
- 2020
45. Reconstruction of Anterior Cruciate Ligament with Tendon Knot Press-Fitted Technique
- Author
-
Hai-peng Li and Yu-jie Liu
- Subjects
Orthodontics ,Anterior cruciate ligament reconstruction ,business.industry ,medicine.medical_treatment ,Anterior cruciate ligament ,musculoskeletal system ,Fixation method ,Tendon ,Fixation (surgical) ,medicine.anatomical_structure ,Knot (unit) ,medicine ,Bone tunnel ,business ,Transfix - Abstract
During the surgery of anterior cruciate ligament reconstruction, the fixation methods can be divided into direct fixation and indirect fixation according to the fixation position of the tendon and the relationship between the graft and the bone tunnel. Direct fixation methods included interface screw and Rigidfix cross nail. Indirect fixation included button steel plate, transfix suspension, and PEG fixation [1]. The cost of either fixation method is high for patients. The author designed the technique of tendon knot press-fitted method to reconstruct ACL and achieved good results [2, 3].
- Published
- 2020
46. Removal of Plate and Screws Under Endoscopy
- Author
-
Yu-jie Liu and Hai-peng Li
- Subjects
Blood vessel injury ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,Open surgery ,Invasive surgery ,Medicine ,Bone healing ,Functional recovery ,business ,Hospital stay ,Surgery ,Endoscopy - Abstract
Fractures of extremities are usually fixed with plates and screws. After fracture healing, plates and screws are always removed by conventional open surgery (Fig. 10.1). In 2001, the author designed the technique to remove the plate and screws under endoscopy [1]. The advantages of this technique include less bleeding, clear operative field, minimally invasive, shorter hospital stay, faster functional recovery, and no complications such as nerve and blood vessel injury. This technique enriches the indication of minimally invasive surgery and widens the application field of endoscopy.
- Published
- 2020
47. Minimally Invasive Arthroscopy for Achilles Tendinopathy
- Author
-
Yu-jie Liu, Feng Qu, and Hai-peng Li
- Subjects
musculoskeletal diseases ,medicine.medical_specialty ,Achilles tendon ,medicine.diagnostic_test ,business.industry ,Arthroscopy ,Chronic fatigue ,musculoskeletal system ,medicine.disease ,Surgery ,Tendon ,medicine.anatomical_structure ,medicine ,Tendinopathy ,Calcaneal tuberosity ,business - Abstract
The Achilles tendon, the most powerful tendon in the human body that carries and transmits the body’s load, is formed by the joint of the gastrocnemius and soleus tendons and attached to the calcaneal tuberosity (Fig. 11.1) [1, 2]. Achilles tendinopathy may be associated with exercise overload, repeated accumulation of chronic fatigue injury, resulting in chronic damage to Achilles tendon fibers [3].
- Published
- 2020
48. Frequency Reconfigurable Quasi-Yagi Antenna with a Novel Balun Loading Four PIN Diodes
- Author
-
Guang-Ming Wang, Hai-Peng Li, Peng Xie, Xiangxin Kong, and Tong Wen
- Subjects
Physics ,Reconfigurable antenna ,020208 electrical & electronic engineering ,PIN diode ,020206 networking & telecommunications ,02 engineering and technology ,Antenna tuner ,law.invention ,Microstrip antenna ,law ,Balun ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering ,Electrical and Electronic Engineering ,Antenna (radio) - Abstract
A novel frequency reconfigurable Quasi-Yagi antenna is proposed. The antenna has two dipoles on different layers of the substrate and they are fed by two coplanar striplines. Four PIN diodes, loading inside the coplanar striplines, are used as the switches. By switching the states of the four diodes, the antenna can work in three modes with different working bands around 3.5 GHz (cover the band of WiMAX), 5.2 GHz (cover the band of WLAN) and 7 GHz respectively. In addition, the working bands can be independently tuned by adjusting several parameters of the antenna. A prototype antenna was fabricated and tested. Good agreement between the simulation and the measurement is achieved. The results prove that the antenna can realize frequency reconfiguration effectively while maintaining the pattern characteristic of Yagi antenna at all frequency.
- Published
- 2018
49. Tuning the CO2 and C1/C2 Hydrocarbon Capture and Separation Performance for a Zn-F-Triazolate Framework through Functional Amine Groups
- Author
-
Mancheng Hu, Quan-Guo Zhai, Hua-Ming Sun, Yucheng Jiang, Shu-Ni Li, and Hai-Peng Li
- Subjects
chemistry.chemical_classification ,010405 organic chemistry ,Chemistry ,General Chemistry ,Microporous material ,010402 general chemistry ,Condensed Matter Physics ,Co2 adsorption ,01 natural sciences ,Combinatorial chemistry ,0104 chemical sciences ,Hydrocarbon ,Group (periodic table) ,Molecule ,Surface modification ,General Materials Science ,Amine gas treating - Abstract
Functionalization by amine groups has been recognized as an effective route to promote the gas capture and separation performance of MOF materials; however, it remains elusive to date what is the optimal number of functional amine groups and which specific MOFs are suitable to be functionalized. To answer these questions, systemic investigations on the interactions between gas molecules and NH2-functionalized MOFs are necessary. Here a microporous Zn-F-triazolate framework which can be easily decorated by different −NH2 groups is selected (Zn-F-TRZ, Zn-F-ATRZ, and Zn-F-DATRZ; TRZ = 1,2,4-triazole, ATRZ = 3-amino-1,2,4-triazole, DATRZ = 3,5-diamino-1,2,4-triazole) to discuss the effect of amine groups on CO2 and C1/C2 hydrocarbon capture and separation. When the pressure is lower than about 0.15 atm, the CO2 uptakes increase directly with the number of anime groups (Zn-F-TRZ < Zn-F-ATRZ < Zn-F-DATRZ). However, at 1 atm, the decoration of one amine group effectively improves the CO2 adsorption of the Zn-F-t...
- Published
- 2018
50. Enhanced gas separation performance of an ultramicroporous pillared-layer framework induced by hanging bare Lewis basic pyridine groups
- Author
-
Xiang-Yang Hou, Hai-Peng Li, Quan-Guo Zhai, Yucheng Jiang, Shu-Ni Li, and Mancheng Hu
- Subjects
Pore size ,Stacking ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Inorganic Chemistry ,chemistry.chemical_compound ,chemistry ,Chemical engineering ,Pyridine ,Carboxylate ,Gas separation ,0210 nano-technology ,Selectivity ,Porous medium ,Layer (electronics) - Abstract
Pillared-layer metal–organic frameworks show great promise for gas storage and separation because their pore size as well as functionality usually can be controlled and adjusted synergistically. By combining the common pyridine and carboxylate groups, we design herein a new 3D pillared-layer framework, [Co2(DBPT)(BPY)2(CO3)]n (SNNU-95). Dinuclear [Co2] motifs are connected by DBPT ligands to form a 2D layer, which is further bridged by BPY to obtain the 3D pillar-layered framework of SNNU-95. Remarkably, two un-coordinated pyridine groups of DBPT not only help stabilize the 2D layer through π⋯π stacking but also point into the 1D channels to create an ultramicroporous environment. Taking advantage of the ultramicroporosity and pyridine Lewis basic sites, SNNU-95 shows not only extra high CO2 over CH4 and C2 hydrocarbons over CH4 selectivity, but also remarkable C2H2/CO2, C2H2/C2H4, and C2H4/CO2 separation under ambient conditions. This synergistic effect resulting from functional groups and pore size provides a promising route to design porous materials for the highest possible gas uptake and separation performance.
- Published
- 2018
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