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Research on the IFC Based Data Flow of OA System for Construction Projects
Zhao Xu,Xiayan Xu,Nan Chen 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.8
Building information model (BIM) has become the mainstream in the contemporary architecture industry, which can integrate all construction project information during the life cycle, including all stages such as the survey, design, construction, delivery, use, operation, maintenance and so on. For BIM, IFC is a commonly used format which is an oriented file format with a data model to facilitate interoperability in the building industry. Besides, OA system is an efficient manager for information data while IFC standard is a kind of data expression standard for construction products. With data flow-oriented design of OA system based on IFC, the management and application of IFC data with large number and complex structure are easily worked out, which makes sharing and utilization of resources during life cycle more efficient. This article deals with a detailed analysis of the IFC data format. According to the general principle of data flow-oriented design of OA system, the framework of data flow-oriented design based on IFC is proposed, as well as the framework of storage module and the extension method of the data dictionary based on IFC, which brings great convenience for model and big data management of enterprises.
Chen Chen,Yu-Jie Chi,Ming-Yang Zhao,Wei Xu 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.1
Functional properties, antioxidant, and angiotensin-I converting enzyme (ACE) inhibitory activities of egg white protein hydrolysate (EWPH) prepared with trypsin at different degree of hydrolysis (DH) were investigated. The DPPH radical scavenging activity, reducing power, lipid peroxidation inhibitory activity, and ACE inhibitory activity increased with DH at first and then decreased gradually. Hydrolysates with 12.4% DH had the highest antioxidant and ACE inhibitory activities. As DH increased, the solubility of EWPH increased while the emulsifying and foaming properties decreased. The functional properties of EWPH were also controlled by pH. Ultrafiltration of the hydrolysate with 12.4% DH revealed that the fractions of molecular weight lower than 3 kDa exhibited the highest antioxidant and ACE inhibitory activities. The results indicated that EWPH with different DH have different bioactive and functional properties and EWPH by controlled hydrolysis may be useful ingredients in food and nutraceutical applications with potential bioactive properties.
Feiyan Chen,Wenjing Zhang,Shuyi Xu,Hantao Zhang,Lin Chen,Cuihua Chen,Zhu Zhu,Yunan Zhao 고려인삼학회 2023 Journal of Ginseng Research Vol.47 No.5
Background: 20(S)-protopanaxadiol (PPD), a ginsenoside metabolite, has prominent benefits for thecentral nervous system, especially in improving learning and memory. However, its transcriptionaltargets in brain tissue remain unknown. Methods: In this study, we first used mass spectrometry-based drug affinity responsive target stability(DARTS) to identify the potential proteins of ginsenosides and intersected them with the transcriptionfactor library. Second, the transcription factor PURA was confirmed as a target of PPD by biolayerinterferometry (BLI) and molecular docking. Next, the effect of PPD on the transcriptional levels of targetgenes of PURA in brain tissues was determined by qRT-PCR. Finally, bioinformatics analysis was used toanalyze the potential biological features of these target proteins. Results: The results showed three overlapping transcription factors between the proteomics of DARTSand transcription factor library. BLI analysis further showed that PPD had a higher direct interaction withPURA than parent ginsenosides. Subsequently, BLI kinetic analysis, molecular docking, and mutations inkey amino acids of PURA indicated that PPD specifically bound to PURA. The results of qRT-PCR showedthat PPD could increase the transcription levels of PURA target genes in brain. Finally, bioinformaticsanalysis showed that these target proteins were involved in learning and memory function. Conclusion: The above-mentioned findings indicate that PURA is a transcription target of PPD in brain,and PPD upregulate the transcription levels of target genes related to cognitive dysfunction by bindingPURA, which could provide a chemical and biological basis for the study of treating cognitive impairmentby targeting PURA.
A Novel Method to Improve the Dispersibility of Silicon Nitride Powders in Aqueous Media
Bingjie Xu,Mengxing Li,Qi Chen,Pengfei Liu,Baosong Xu,Ben Qiu,Liang Xu,Zhao Han 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.9
The present study describes a novel method to improve the dispersibility of silicon nitride powders in aqueous media. Specifically, a new Si3N4@g-C3N4 core–shell composite material was synthesized via annealing the mixture of silicon nitride and melamine under a nitrogen atmosphere using heating method. The effects of various initial mass ratios of Si3N4 and melamine on the structure and dispersibility of the composite were systematically investigated. The results of X-ray photoelectron spectroscopy and transmission electron microscope demonstrated that as-obtained Si3N4@g-C3N4 composite powders possess the core–shell structure, whereas the zeta potential and sedimentation analysis showed that they exhibit good dispersion in aqueous media. Furthermore, the colloidal dispersion of the composite powders is most stable when the initial mass ratio of Si3N4 and melamine is 100 : 3. The coated g-C3N4 could be completely removed in a cryogenic nitrogen atmosphere. The proposed process is expected to provide novel avenues for the study of dispersion of other inorganic powders.
Xu Chen,Jing-Lei Zhao,Gui-Lin She,Yan Jing,Hua-Yan Pu,Jun Luo 국제구조공학회 2022 Steel and Composite Structures, An International J Vol.45 No.5
Fluid-conveying tubes are widely used to transport oil and natural gas in industries. As an advanced composite material, functionally graded carbon nanotube-reinforced composites (FG-CNTRC) have great potential to empower the industry. However, nonlinear free vibration of the FG-CNTRC fluid-conveying pipe has not been attempted in thermal environment. In this paper, the nonlinear free vibration characteristic of functionally graded nanocomposite fluid-conveying pipe reinforced by single-walled carbon nanotubes (SWNTs) in thermal environment is investigated. The SWCNTs gradient distributed in the thickness direction of the pipe forms different reinforcement patterns. The material properties of the FGCNTRC are estimated by rule of mixture. A higher-order shear deformation theory and Hamilton’s variational principle are employed to derive the motion equations incorporating the thermal and fluid effects. A two-step perturbation method is implemented to obtain the closed-form asymptotic solutions for these nonlinear partial differential equations. The nonlinear frequencies under several reinforcement patterns are presented and discussed. We conduct a series of studies aimed at revealing the effects of the flow velocity, the environment temperature, the inner-outer diameter ratio, and the carbon nanotube volume fraction on the nature frequency.
Micrococcus endophyticus sp. nov., isolated from surface-sterilized Aquilaria sinensis roots.
Chen, Hua-Hong,Zhao, Guo-Zhen,Park, Dong-Jin,Zhang, Yu-Qin,Xu, Li-Hua,Lee, Jae-Chan,Kim, Chang-Jin,Li, Wen-Jun Society for General Microbiology 2009 International journal of systematic and evolutiona Vol.59 No.5
<P>A Gram-positive bacterial strain, designated YIM 56238(T), was isolated from plant roots (Aquilaria sinensis), and characterized by using a polyphasic approach. Strain YIM 56238(T) grew optimally at pH 7.0-8.0 and at 28 degrees C. Analysis of the 16S rRNA gene sequence of strain YIM 56238(T) indicated that it belongs to the genus Micrococcus. Chemotaxonomic data strongly supported the classification of this strain within the genus Micrococcus: the cell-wall peptidoglycan contained lysine, glutamic acid, alanine and glycine; the predominant menaquinones were MK-8(H(2)) (63.6 %) and MK-7(H(2)) (21.1 %); the phospholipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and an unknown ninhydrin-negative phospholipid; and the major cellular fatty acids were iso-C(15 : 0) (30.95 %) and anteiso-C(15 : 0) (53.75 %). The G+C content of the genomic DNA was 72.9 mol%. A number of physiological features were found that clearly distinguished strain YIM 56238(T) from recognized species of the genus Micrococcus. DNA-DNA hybridization studies suggested that the novel strain represents a separate genomic species. On the basis of the data, therefore, strain YIM 56238(T) represents a novel species of the genus Micrococcus, for which the name Micrococcus endophyticus sp. nov. is proposed. The type strain is YIM 56238(T) (=DSM 17945(T)=KCTC 19156(T)).</P>
Design of Silica-protected Surface-enhanced Raman Scattering Nanoprobe for Immunosorbent Assay#
CHEN LEI,사영조,Xu Wang,Bing Zhao,정영미 대한화학회 2015 Bulletin of the Korean Chemical Society Vol.36 No.3
In this study, we present a method of achieving highly sensitive immunoassays based on surface-enhanced Raman scattering (SERS). The biofunctional-nanoprobe-linked immunosorbent assay is a closely related technique with a good linear range and the ability to simultaneously detect antigens with high sensitivity. Herein, we report a novel method based on a sandwich structure composed of a silver monolayer and biocompatible Au-mercaptobenzoic acid (MBA)@SiO2 that was assembled through an immune recognition reaction. To induce a strong plasmonic contribution of the nanoprobes, two or more MBA-adsorbed gold nanoparticles were saturated and loaded into silica. Silica-protected gold nanoaggregates exhibit stable SERS activity and biocompatibility for proteins. The capabilities of the proposed sandwich structure for analytical applications were demonstrated through the use of the SERS technique to detect antigens at very low concentrations. These techniques may prove to be superior to current protocols for biomarker research and clinical diagnosis, which require high sensitivity and quantitation over an extended range.