Contralateral Suppression at Adrenal Venous Sampling Is Associated with Renal Impairment Following Adrenalectomy for Unilateral Primary Aldosteronism (Endocrinol Metab 2021;36:875-84, Ye Seul Yang et al.)

Zhimin Tan,Qiyu He,Liang Zhou 대한내분비학회 2022 Endocrinology and metabolism Vol.37 No.6

Independent Correlation of the C1–2 Cobb Angle With Patient-Reported Outcomes After Correcting Chronic Atlantoaxial Instability

Zhimin Pan,Yanhai Xi,Wei Huang,김긍년,이성,신동아,Kai Huang,Yu Chen,Zhongren Huang,Da He,하윤 대한척추신경외과학회 2019 Neurospine Vol.16 No.2

Objective: To investigate three-planar radiographic results and patient-reported outcomes (PROs) after correcting chronic atlantoaxial instability (AAI) by translaminar screw (TLS) and pedicle screw (PS) fixation, and to explore the potential association of atlantoaxial realignment with PRO improvements. Methods: Twenty-three patients who underwent C1 lateral mass screw (LMS)-C2 TLS and 29 who underwent C1 LMS-C2 PS with ≥2 years of follow-up were retrospectively analyzed. Three-planar (sagittal, coronal, and axial) radiographic parameters were measured. PROs including the Neck Disability Index (NDI), Japanese Orthopaedic Association (JOA) score and the Short Form 36 Physical Component Summary (SF-36 PCS) were documented. Factors potentially associated with PROs were identified. Results: The radiographic parameters significantly changed postoperatively except the C1–2 midlines’ intersection angle in the TLS group (p=0.073) and posterior atlanto-dens interval in both groups (p=0.283, p=0.271, respectively). The difference in bilateral odontoid lateral mass interspaces at last follow-up was better corrected in the TLS group than in the PS group (p=0.010). Postoperative PROs had significantly improved in both groups (all p<0.05). Thereinto, NDI at last follow-up was significantly lower in the TLS group compared with PS group (p=0.013). In addition, blood loss and operative time were obviously lesser in TLS group compared with PS group (p=0.010, p=0.004, respectively). Multivariable regression analysis revealed that a change in C1–2 Cobb angle was independently correlated to PROs improvement (NDI: β=-0.435, p=0.003; JOA score: β=0.111, p=0.033; SF-36 PCS: β=1.013, p=0.024, respectively), also age ≤40 years was independently associated with NDI (β=5.40, p=0.002). Conclusion: Three-planar AAI should be reconstructed by C1 LMS-C2 PS fixation, while sagittal or coronal AAI could be corrected by C1 LMS-C2 TLS fixation. PROs may improve after atlantoaxial reconstruction in patients with chronic AAI. The C1–2 Cobb angle is an independent predictor of PROs after correcting chronic AAI, as is age ≤40 years for postoperative NDI.

An Analysis of Regional Economy and Resourcesand Environment Coordinated Development Based on PSR Model : A Case Study of Zhongyuan Urban Agglomerations

Pengyan Zhang,Jianjian He,Wang Huili,Zhimin Zhou 보안공학연구지원센터 2016 International Journal of Smart Home Vol.10 No.9

With the acceleration of urbanization, the resources and environment problem has become more and more prominent in Zhongyuan urban agglomerations. Based on evaluation model of resources and environment coordination degree of Pressure-State-Response (PSR), this study adopted the coordination degree analysis methods to calculate and evaluate the resources and environment coordinated development of nine central cities in Zhongyuan Urban Agglomerations from 2006 to 2013. Results showed that: (1) from 2006 to 2013, the statuses of the nine central cities in Zhongyuan Urban Agglomerations were in moderate coordination, elementary coordination, on the verge of imbalance and moderate imbalance, the economic development and the resources and environment statuses were not optimistic; (2) from 2006 to 2009, those cities’ statuses were in moderate imbalance, on the verge of imbalance and elementary coordination, the overall development coordination degree was not high, could not reach the state of coordinated development. Luoyang, Jiaozuo, Xuchang and Luohe’s coordinated development situation was not up to standard, whose status was in moderate imbalance; (3) from 2010 to 2013, the nine cities were on the verge of imbalance, elementary coordination and moderate coordination, coordinated development was improved.

Residual stress field of ballised holes

Man On Lai,Zhimin He 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.5

"Ballising, involving pushing a slightly over-sized ball made of hard material through a hole, is a kind of cold working process. Applying ballising process to fastener holes produces compressive residual stress on the edge of the holes, and therefore increases the fatigue life of the components or structures. Quantification of the residual stress field is critical to define and precede the ballising process. In this article, the ballised holes are modeled as cold-expanded holes. Elastic-perfectly plastic theory is employed to analyze the holes with cold expansion process. For theoretical simplification, an axially symmetrical thin plate with a cold expanded hole is assumed. The elasticplastic boundaries and residual stress distribution surrounding the cold expanded hole are derived. With the analysis, the residual stress field can be obtained together with actual cold expansion process in which only the diameters of hole before and after cold expansion need to be measured. As it is a non-destructive method, it provides a convenient way to estimate the elastic-plastic boundaries and residual stresses of cold worked holes. The approach is later extended to the case involving two cold-worked holes. A ballised hole is looked upon as a cold expanded hole and therefore is investigated by the approach. Specimens ballised with different interference levels are investigated. The effects of interference levels and specimen size on residual stresses are studied. The overall residual stresses of plates with two ballised holes are obtained by superposing the residual stresses induced on a single ballised hole. The effects of distance between the centers of the two holes with different interference levels on the residual stress field are revealed."

An Effective and Green Method for the Extraction and Purification of Aglycone Isoflavones from Soybean

Mengfan Wang,Jian Guo,Wei Qi,Rongxin Su,Zhimin He 한국식품과학회 2013 Food Science and Biotechnology Vol.22 No.3

In this paper, an effective and green strategy was developed to obtain aglycone isoflavones from soybean through the extraction, hydrolysis, and purification steps. Firstly, a novel ethanol-alkaline extraction method was designed and optimized. The high extraction yield (94.34%)of isoflavones was achieved under the optimal extraction conditions of pH 9.0, 70oC, 60 min, ethanol concentration of 65%, and 1:15 of the solid to liquid ratio. Then, the cellulase (GC-220) was used instead of traditional β-glucosidase to hydrolyze the glycoside isoflavones into aglycone isoflavones which gave an excellent conversion of 95%. Finally, the crude aglycone isoflavones have been purified by an environmental-friendly procedure comprised of ethanol precipitation, ethyl acetate extraction, and water rinse. The final amount of aglycone isoflavones obtained was 1.279 mg for every gram of defatted soybean by this strategy, and the final recovery, and purity of aglycone isoflavones could achieve 80.38 and 87.21%, respectively.

Effect of Temperature and Revolution on the Microstructure, Texture and Microhardness of the AZ80 Alloy Cup Prepared by Rotating Backward Extrusion

Xin Che,Qiang Wang,Xingwang Duan,Min Wang,Linfeng He,Miao Cao,Shuang Liu,Guanshi Zhang,Zhimin Zhang 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.11

Microstructure evolution, phase development and mechanical property of AZ80 alloy cup with various processing temperatures(573 K, 613 K, 653 K) and rotating revolutions (N = 0, 5, 50, 100) during rotating backward extrusion (RBE)were explored. The study founded that reducing deformation temperature or increasing revolution could promote the grainrefinement and DRX proportion. And the sample deformed at the condition of 573 K and N = 100 exhibited the best grainrefinement effect (grain size was 2.5 μm, DRX ratio was up to 99.01%). The bulk eutectic phase existed at all deformationtemperatures, while the dynamic precipitation was only precipitated at temperature of 573 K and 613 K. Increasing thedeformation temperature or revolution could reduce the proportion of the second phase. And an increase in revolution or areduction of temperature would reduce the average size of second phase, due to the phase could be broken by large strainand resolved with elevated temperature. Moreover, increasing the revolution and deformation temperature could promotethe texture weakening, which would be contributed to the occurrence of new recrystallization grains with random orientationand the activation of non-basal slip system. The mechanical property of microhardness was significantly improved withrotating revolution increasing and deformation temperature decreasing. Supported by the grain refinement and dispersionstrengthening, the sample deformed at condition of 573 K and N = 100 achieved maximum hardness values of 96.3 HV.

Spectroscopic Determination of the Species Fractions and the Power Profiles of the Diagnostic Neutral Beam on the HT-7 Tokamak

Jia Fu,Yuejiang Shi,Yingying Li,Fudi Wang,Sheng Liu,Jian Zhang,Jun Li,Yiyyun Huang,Yuanlai Xie,Zhimin Liu,Chundong Hu,Chundong Hu,DNB Team,William Rowan,He Huang 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.58 No.5

A diagnostic neutral beam (DNB) has been installed on the HT-7 tokamak for the measurement of charge exchange recombination spectroscopy (CXRS). The H_α-light Doppler shift spectroscopy from the drifted duct is measured to determine the components of the neutral beam. The fractions of neutral beam species are investigated under a wide range of arc voltages and extraction high voltages of the beam aimed to the optimized species fractions for the CXRS applications. A magnet ring is used to improve the magnetic property of the ion source. The result shows that the full-energy component fractions increase from 19 to 25 percent with optimization of the beam operation, but with a dramatic increase of the water component. There are nine optical fiber channels observing one section of the beam simultaneously for this spectroscopy, which provides information of the power profiles of the beam. The full width at half maximum (FWHM) of the beam profile is 8 cm, as measured by using the spectroscopy.