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RISS 인기검색어
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- 저자 : Zhongyi Jiang (검색결과 3 건)
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Establishment of the Lunar Phase Morphological Classification for Cervical Spinal Canal
Cui Zhongyi,Wang Hongwei,Sun Yuan,Huang Weibo,Zou Fei,Ma Xiaosheng,Lyu Feizhou,Jiang Jianyuan,Wang Hongli 대한척추외과학회 2024 Asian Spine Journal Vol.18 No.1
Study Design: Retrospective clinical trial.Purpose: To establish a morphological classification of the cervical spinal canal using its parameters.Overview of Literature: Cervical spine computed tomography (CT) data of 200 healthy volunteers in 2 years were analyzed. The morphology of the spinal cord was also analyzed.Methods: The median sagittal diameter and transverse diameter of the spinal canal from C2 to C7 were measured on CT images. The ratio of the median sagittal diameter to the transverse diameter was calculated. Accordingly, the spinal canal shape of each segment was classified into four, and the specific criteria of lunar phase classification were determined through linear discriminant analysis based on the ratio of the median sagittal diameter to the transverse diameter. The inter-rater reliability of the classification was explored using Kappa coefficients. Finally, the morphology of the different segments of the cervical spinal canal in healthy volunteers was revised and compared.Results: According to the ratio of the median sagittal diameter and the transverse diameter of the cervical spinal canal, the lunar phase classification of the cervical bony spinal canal was determined as follows: full-moon >0.65, 0.55< convex-moon ≤0.65, 0.46≤ quarter-moon ≤0.55, and residual-moon <0.46. The Kappa values of C2–C7 were 0.851, 0.958, 0.823, 0.927, 0.793, and 0.946, and the Kappa value of all C2–C7 segments was 0.854 that mainly presented two forms of full-moon (76.5%) and convex-moon (23.0%). A quarter-moon spinal canal was mainly distributed in C3, C4, C5, and C6; a residual-moon spinal canal was mainly distributed in C4 and C5; and the morphological distribution of C4 and C5 were similar (<i>p</i>>0.05). The frequency of the spinal canal of the residual-moon type was the highest, and the full-moon (6.5%) and residual-moon (7.5%) types of C7 were rare.Conclusions: The morphological classification of the cervical spinal canal was established to present anatomical variations. The classification showed good inter-rater reliability.
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Yanyan Ma,Yanlei Su,Yafei Li,Zhongyi Jiang 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.9
Composite nanofiltration (NF) membranes with enhanced structural stability were fabricated and used to concentrate oligomeric proanthocyanidins (OPC) in ethanol solution. The composite NF membranes were prepared by interfacial polymerization of piperazine (PIP) with trimesoyl chloride (TMC), upon the porous supports of polyethersulfone (PES) and polyvinyl formal (PVF) blend membranes. The active layers of composite NF membranes were covalently linked to porous supports owing to hydroxyl groups of PVF upon support surface, which could participate in the interfacial polymerization reaction. The pure water fluxes of the composite NF membranes reached 34.9 L/m2h, while the rejections of Na2SO4 and orange GII were 92.7% and 98.4%, respectively. The enhanced structural stability of the composite NF membranes were confirmed by long-term immersion experiment in ethanol. NF concentration process was considered as a potential alternative to conventional evaporation concentration process for OPC concentration in ethanol solution.
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Zhiwei Jiao,Linjie Zhou,Mengyuan Wu,Kang Gao,Yanlei Su,Zhongyi Jiang 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.12
Inspired by the specific amino acid sequence Asn-Pro-Ala (NPA) of water channel aquaporins (AQPs), we fabricated polyamide (PA) nanofiltration (NF) membranes by introducing reduced glutathione (GSH) in interfacial polymerization (IP) method. Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectrometry (XPS), scanning electron microscope (SEM), atomic force microscopy (AFM), zeta potential and static water contact angle measurement were employed to characterize the chemical composition, morphology, electronegativity and hydrophilicity of the NF membranes. The water flux of GSH/PIP-TMC NF membrane reached 32.00 L m2 h1 at 0.2MPa, which was approximately twice than that of pristine PIP-TMC NF membrane when the ratio of GHS to piperazidine (PIP) was 40% during IP process. More water channels were built as GSH was embedded into PA layer. The fabricated NF membranes also took on potent rejection for dyes and Na2SO4. This study presents a simple and facile method to simulate water channels-based biological materials which may find potential application in water treatment.
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