Competency-based Education: Evidence fromSocial Work Postgraduates fromFive Universities in China

Yu Guo,Chien-Chung Huang,Shuang Lu,Yuqi Wang 한국사회복지학회 2016 Asian Social Work and Policy Review Vol.10 No.3

Social work education in China has undergone rapid development during last two decades. However, methods to define, measure, and evaluate social work students’ competency remain largely unexplored. In this study, we evaluated competency in graduate social work students in China and examined factors that impacted competency, based on learning theory. Findings indicated that knowledge and skills learned in class, field placement, and social context all have effects on competency. How students think about individual development and the social work profession has the most significant effect. These findings carry implications for social work education in the Chinese context. The rapid development of social work education in China requires the effective measurement and evaluation of students’ core competencies.

Synthesis, Polymerization Kinetics and Thermal Properties of Benzoxazine Resin Containing ortho-Maleimide Functionality

Boran Hao,Yuqi Liu,Xinye Yu,Kan Zhang 한국고분자학회 2021 Macromolecular Research Vol.29 No.1

A benzoxazine monomer with ortho-maleimide functionality has been synthesized using ortho-maleimide functional phenol, aniline and paraformaldehyde as starting materials. The chemical structure of this benzoxazine monomer is verified by 1H and 13C nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectroscopies, elemental analysis as well as high-resolution mass spectrometry. The polymerization behavior of benzoxazine has been studied by differential scanning calorimetry (DSC) and in situ FT-IR. Besides, the kinetic parameters have been calculated by non-isothermal DSC with different heating rates. The apparent activation energy value of the ortho-maleimide functional benzoxazine is calculated to be 72.43 kJ/mol based on the Starink method. In addition, our predicted thermograms based on the developed model fit well with the curves obtained from experimental DSC results. Moreover, DSC and thermogravimetric analyses (TGA) are used to determine the thermal properties of the cross-linked thermoset. The resulting polybenzoxazine derived from ortho-maleimide functional shows excellent thermal stability (T g of 247 oC; T d5 of 333 oC), evidencing its great potential application in high-performance fields.

Petroleum Company’s Technology Commercialization Mode and Evaluation of Commercial Potential Based on Two-tuple Linguistic

Jin Lei,Li Ming,Yu Yuqi,Zhang Cuili 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.4

A New Method for Preventing Corrosion Failure: Thiourea and Hexamethylenetetramine as Inhibitor for Copper

Yun Wang,Jun Hu,Yuqi Wang,Lijun Yu 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.11

To investigate the inhibition mechanism of combined thiourea and hexamethylenetetramine as a corrosion inhibitor on the surface of copper in 0.5 M HCl solution, the electrochemical properties were measured by potentiodynamic polarization and electrochemical impedance spectroscopy measurements. The generated film was examined by scanning electron microscopy and X-ray photoelectron spectroscopy. Quantum chemical calculations and molecular dynamics simulations were performed to study the properties of thiourea and hexamethylenetetramine. The results suggest that the inhibitors can form strong bonds on the surface of copper. The combination of thiourea and hexamethylenetetramine resulted in stable films, which could inhibit the cathodic and anodic reactions and greatly reduce the diffusion of corrosive particles.

Geographic Variations of Stroke Incidence in Chinese Communities: An 18-Year Prospective Cohort Study from 1997 to 2015

Fan Xia,Xuexin Yu,Yunke Li,Yuqi Chen,Wei Zhang,Chao You,Xin Hu 대한뇌졸중학회 2020 Journal of stroke Vol.22 No.3

Background and Purpose As a leading cause of disability and death in China, stroke as well as its epidemiologic features have gained increasing attention. Prior studies, however, have overgeneralized the north-to-south gradient in China. Whether the differences exist across urban and rural areas remains unexplored. This study therefore aims to investigate the north-to-south gradient in stroke incidence across urban and rural China. Methods The present prospective cohort study analyzed data from the China Health and Nutrition Survey 1997 to 2015. By including 16,917 individuals from diverse social contexts, we calculated the age-standardized incidence of stroke across regions and the age-adjusted risk ratio (aRR). Cox proportional hazards models with time-varying covariates were employed to analyze variations in incident stroke. Results During the follow-up, age-standardized incidence of stroke ranged from 4.17 per 1,000 person-years (95% confidence interval [CI], 3.38 to 4.96) in the north region to 1.95 (95% CI, 1.60 to 2.30) in the south region (aRR, 2.04; 95% CI, 1.58 to 2.64; P<0.001). The north-to-south gradient of stroke incidence was observed only in rural areas, but not in urban areas. Hierarchical modelling analyses further indicated that the regional differences could be mostly explained by the disparities in the prevalence of hypertension. Conclusions The present study extends the current evidence on the north-to-south gradient by demonstrating that the difference varied across urban and rural China. Our findings highlight the importance of hypertension management as the measure for alleviating regional differences in stroke incidence.

Bio-inspired antifouling Cellulose nanofiber multifunctional filtration membrane for highly efficient emulsion separation and application in water purification

Xiangying Yin,Yi He,Yuqi Wang,Hao Yu,Jingyu Chen,Yixuan Gao 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.10

Membrane fouling is usually a troublesome issue in oily water treatment, especially containing complex crude oil emulsions. Although most of the reported membranes are in a position to repel models oils, it’s still a big challenge of repelling crude oil. Besides, the fabrication processes of those membranes are too complicated, high-cost and environmentally unfriendly. Hence, in this work, a facile and green method was designed to fabricate a Cellulose nanofiber (CNF) polyelectrolyte filtration membrane with excellent underwater superoleophobic characteristic and outstanding antifouling performance. The membrane not only can separate oil/water emulsions with a high separation efficiency (>99%) and water flux (>11,000 L m2 h1), but also remove positively charged dyes with good permeation fluxes (>10,000 L m2 h1) and rejection radio (>98%). Herein, it can be anticipated that this method has excellent potential for designing and preparing the specific membranes for multifunctional applications in water treatment.

Trophoblast Cell Subtypes and Dysfunction in the Placenta of Individuals with Preeclampsia Revealed by Single‑Cell RNA Sequencing

Wenbo Zhou,Huiyan Wang,Yuqi Yang,Fang Guo,Bin Yu,Zhaoliang Su 한국분자세포생물학회 2022 Molecules and cells Vol.45 No.5

Trophoblasts, important functional cells in the placenta, play a critical role in maintaining placental function. The heterogeneity of trophoblasts has been reported, but little is known about the trophoblast subtypes and distinctive functions during preeclampsia (PE). In this study, we aimed to gain insight into the cell type-specific transcriptomic changes by performing unbiased single-cell RNA sequencing (scRNA-seq) of placental tissue samples, including those of patients diagnosed with PE and matched healthy controls. A total of 29,006 cells were identified in 11 cell types, including trophoblasts and immune cells, and the functions of the trophoblast subtypes in the PE group and the control group were also analyzed. As an important trophoblast subtype, extravillous trophoblasts (EVTs) were further divided into 4 subgroups, and their functions were preliminarily analyzed. We found that some biological processes related to pregnancy, hormone secretion and immunity changed in the PE group. We also identified and analyzed the regulatory network of transcription factors (TFs) identified in the EVTs, among which 3 modules were decreased in the PE group. Then, through in vitro cell experiments, we found that in one of the modules, CEBPB and GTF2B may be involved in EVT dysfunction in PE. In conclusion, our study showed the different transcriptional profiles and regulatory modules in trophoblasts between placentas in the control and PE groups at the single-cell level; these changes may be involved in the pathological process of PE, providing a new molecular theoretical basis for preeclamptic trophoblast dysfunction.

Clinical Uses of Diffusion Tensor Imaging Fiber Tracking Merged Neuronavigation with Lesions Adjacent to Corticospinal Tract : A Retrospective Cohort Study

Yu, Qi,Lin, Kun,Liu, Yunhui,Li, Xinxing The Korean Neurosurgical Society 2020 Journal of Korean neurosurgical society Vol.63 No.2

Objective : To investigate the efficiency of diffusion tensor imaging (DTI) fiber-tracking based neuronavigation and assess its usefulness in the preoperative surgical planning, prognostic prediction, intraoperative course and outcome improvement. Methods : Seventeen patients with cerebral masses adjacent to corticospinal tract (CST) were given standard magnetic resonance imaging and DTI examination. By incorporation of DTI data, the relation between tumor and adjacent white matter tracts was reconstructed and assessed in the neuronavigation system. Distance from tumor border to CST was measured. Results : The sub-portion of CST in closest proximity to tumor was found displaced in all patients. The chief disruptive changes were classified as follows : complete interruption, partial interruption, or simple displacement. Partial interruption was evident in seven patients (41.2%) whose lesions were close to cortex. In the other 10 patients (58.8%), delineated CSTs were intact but distorted. No complete CST interruption was identified. Overall, the mean distance from resection border to CST was 6.12 mm (range, 0-21), as opposed to 8.18 mm (range, 2-21) with simple displacement and 2.33 mm (range, 0-5) with partial interruption. The clinical outcomes were analyzed in groups stratified by intervening distances (close, <5 mm; moderated, 5-10 mm; far, >10 mm). For the primary brain tumor patients, the proportion of completely resected tumors increased progressively from close to far grouping (42.9%, 50%, and 100%, respectively). Five patients out of seven (71.4%) experienced new neurologic deficits postoperatively in the close group. At meantime, motor deterioration was found in six cases in the close group. All patients in the far and moderate groups received excellent (modified Rankin Scale [mRS] score, 0-1) or good (mRS score, 2-3) rankings, but only 57.1% of patients in the close group earned good outcome scores. Conclusion : DTI fiber tracking based neuronavigation has merit in assessing the relation between lesions and adjacent white matter tracts, allowing prediction of patient outcomes based on lesion-CST distance. It has also proven beneficial in formulating surgical strategies.