9,9-Dimethyl-9,10-dihydroacridine functionalized phosphoindole oxides with AIE property for OLED application

Li Jianqing,Zhuang Zeyan,Zhu Xiangyu,Zhao Zujin,BEN ZHONG TANG 한국정보디스플레이학회 2020 Journal of information display Vol.21 No.3

Aggregation-induced emission (AIE) has attracted widespread attention of late in academic and industrial circles owing to its diverse applications. Developing AIE-active materials for application in organic light-emitting diodes (OLEDs) has become an effective method of improving device efficiency and stability. In this work, two novel luminogens (PIO-α-DMAc and PIO-β-DMAc) consisting of 9,9-dimethyl-9,10-dihydroacridine and phosphoindole oxide were synthesized and systemically characterized. Their crystal structures, thermal stabilities, electronic structures, and electrochemical behaviors were studied. They showed apparent AIE properties and emitted strongly in the aggregated state. Non-doped and doped green OLEDs were fabricated using these luminogens as light-emitting layers, and exhibited high brightness, good electroluminescence efficiencies, and low turn-on voltages

韓中儒敎文化認知:唐前“四史”韓半島文獻源流疏證及現代闡釋

이검청 ( Li Jianqing ),양쇠 ( Liang Zhao ) 경북대학교 퇴계연구소 2016 퇴계학과 유교문화 Vol.59 No.-

唐前“四史”中的韓半島文獻資料是東亞儒敎文化圈的歷史書寫。對韓國而言,這些屬於一種“域外之文獻”。 本文對唐前“四史”的韓半島文獻進行源流疏證與現代闡釋,認爲唐前韓半島文化認知有三個的基本特徵:一、從文獻增量看,相較于《史》《漢》而言,《三國志》《後漢書》中關於韓半島文獻的累增性,體現了對韓半島文化認知的漸進性特徵;二、從敍事模式上看,唐前“四史”中的《史記》《漢書》延續著“在重大歷史事件中展現人物性格、命運”的敍事模式變爲《三國志》《後漢書》中的“山海經”敍事模式,體現了對韓半島文化認知維度的更新性特徵;三從地理空間格局來看,唐前“四史”對韓半島地理空間的認知發生了兩次飜天覆地的變化。具體說,一是司馬遷首次將韓半島納入史學視野之中,形成了“漢四郡”地理空間的認知。二是陳壽《三國志》中將高句麗、東沃沮、三韓等地囊括其中,擴大了對樂浪郡(今屬朝鮮)周邊地域的認知。20世紀初,中韓兩國雖已超越了朝貢關係,但兩國在文化上依然同根同源,是東亞“儒敎文化圈”的重要組成部分。因此,唐前韓半島文化認知具有以下三個方面的現代價値:一、對於韓半島文化而言,唐前“四史”中的韓半島文獻是韓國文化悠久性的一大確證。二、唐前“四史”中的韓半島文獻是理解中韓文化的同源性一大鏡像。三、唐前“四史”中的韓半島文獻是中韓文化交流的見證。總之,唐前“四史”中的韓半島文獻成爲理解東亞儒敎文化的同源性,實現中韓文化對話的基礎。 Rooting from Chinese Pre-Tang Dynasty, China-Korea cultural cognition literature, for the South Korea, is foreign literature. By analyzing the Koreans’ Literature Origin of the Four Famous History Books in Pre-Tang Dynasty, this paper investigates that the Two Koreas’ cultural cognition before Tang Dynasty has there characteristics as follows:Firstly, the cognitive historical data is progressive. Secondly, the cognitive dimension is renewal. Finally, the cognitive pattern is pioneering. The significance of the cultural cognition has three important points: Firstly, for Korean culture, the Four Famous History Books in Pre-Tang Dynasty confirms the Korean culture has a long history. Secondly, the Korean literature is the mirror to understand the homology of China-Korea culture. Thirdly, the Korean literature is the witness of cultural communication between China and Korea.

Extreme Value Prediction of Traffic Loads Using the Average Conditional Exceedance Rate Method

Liping Zhang,Jianqing Bu,Liming Zhou,Wenlong Cao,Cunbao Zhao,Wei Chai 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.12

An efficient prediction of the extreme value of traffic loads is crucial for the structural design, reliability evaluation, maintenance planning, and further life-cycle cost analysis of bridges. In this work, a novel method is proposed for predicting the appropriate extreme traffic load distribution. Specifically, the average conditional exceedance rate (ACER) statistical model is estimated from the historical traffic loads which was collected through a weigh-in-motion system installed in toll stations. The basic idea of the ACER approach lies in the introduction of a cascade of conditioning approximations and the average exceedance rate to capture the dependence effects and obtain the data tail, the trend features of which are fitted with a similar Gumbel distribution function and extrapolated to the concerned level. An illustration case dealing with traffic loads using the ACER strategy is presented, the extreme value and confidence interval (CI) in any return period can be predicted by application of this approach. Furthermore, the peaks-over-threshold (POT) method based on the asymptotic extreme theory is also applied to illustrate the advantages of the ACER method. The ACER method has advantages in analyzing extreme traffic loads, with good robustness and the ability to handle extreme value prediction for different sampling strategies, it also can produce more accurate confidence intervals and predicts consistent extreme values. The study results are expected to help accurately determine traffic loads and ensure safety in bridge engineering.

Diffusion-Weighted MRI for the Initial Viability Evaluation of Parasites in Hepatic Alveolar Echinococcosis: Comparison with Positron Emission Tomography

Jianjun Zheng,Jing Wang,Jianqing Zhao,Xianyun Meng 대한영상의학회 2018 Korean Journal of Radiology Vol.19 No.1

Objective: More than 70% of hepatic alveolar echinococcosis (HAE) are inoperable. Thus, long-term, or even life-long, pharmacological treatment with benzimidazoles is necessary. For effective treatment, it is of great importance to employ imaging techniques to detect and monitor the non-resectable parasitic viability. Therefore, this study aimed to evaluate diffusion-weighted imaging (DWI) in assessing the viability of HAE in comparison to 18-fluoro-deoxyglucose (18F-FDG) positron emission tomography, combined with computed tomography (PET/CT). Materials and Methods: Positron emission tomography, computed tomography and DWI (b-values: 0, 800 s/mm2) were retrospectively analysed in eight patients with clinically-verified HAE to, generate the apparent diffusion coefficient (ADC) map. The activity of HAE lesions in both techniques were determined independently by two radiologists according to the following standard: (+), marked focally or perilesionally increased FDG uptake/high signal intensity; (−), a hepatic defect without FDG uptake/no high signal intensity. Every lesion’s maximum standardized uptake value (SUVmax) on the PET/CT images and mean ADC values on the parametric ADC maps were measured respectively. Results of PET/CT and DWI were compared on a per-lesion-basis. Pearson’s correlation coefficient was assessed for statistical analysis. Results: A total of 14 HAE lesions were detected. Eight lesions (diameter 3−15 cm) showed perilesional hyper-signal intensity on DWI. This was visualised on PET/CT as increased FDG uptake. They mainly existed in the lesion’s border with normal liver parenchyma. Five lesions (diameter < 2 cm) were detected as nodular hyperintensity on DWI and a ‘hot spot’ on PET/CT in the same distribution. One patient, who had received oral drug therapy for three years showed significantly decreased perilesional hyperintensity on the DWI and a hepatic defect without any FDG uptake on PET/CT. Pearson’s correlation coefficient indicated a significant inverse correlation of the ADC and the SUVmax (r = -0.67, p < 0.001). Conclusion: Diffusion-weighted imaging is capable of offering information on visually detecting the HAE lesions’ viability and may be useful for routine application in the initial diagnosis of HAE.

Preparation and Properties of Halogen-Free Flame Retardant and High Refractive Index Optical Resin via Click Chemistry

Chaoyun Luo,Jiandong Zuo,Fuquan Wang,Yanchao Yuan,Feng Lin,Jianqing Zhao 한국고분자학회 2018 Macromolecular Research Vol.26 No.4

Halogen-free flame retardant tri(acryloyloxyethyl) phosphate (TAEP) optical resin was prepared using hydroxy ethyl acrylate (HEA) and phosphorus oxychloride and the chemical structure was characterized by Fourier transform infrared spectrometer and proton nuclear magnetic resonance spectrometer. Optical resins mixed by pentaerythritol tetrathioglycolic and TAEP with different S and P contents were obtained via click chemistry curing. The curing performance, thermal stability and flame retardant performance of the optical resins were analyzed by differential scanning calorimeter, thermogravimetric analyzer, and vertical burning tester, respectively. Additionally, the burned residual morphology of samples was investigated by scanning electronic microscopy, and the refractive indices of the optical resins were measured by an Abbe refractometer. The results revealed that increasing S content could improve the refractive indices of the resins; whereas, the flame retardant performances decreased. The optical resins with S content of 2% and P contents of 7.37% had refractive indices of 1.4935 and UL 94 V-0 flame retard level, respectively. The optical resins had good thermal stability and the 5% decomposition temperature reached up to 200.1 ℃.

Genetic variations in DROSHA and DICER and survival of advanced non-small cell lung cancer: a two-stage study in Chinese population

Shuangshuang Wu,Yun Pan,Songyu Cao,Jiali Xu,Yan Liang,Yan Wang,Lei Chen,Yunyan Wei,Chongqi Sun,Weihong Zhao,Zhibin Hu,Hongxia Ma,Hongbing Shen,Jianqing Wu 한국유전학회 2015 Genes & Genomics Vol.37 No.7

MicroRNAs (miRNA) are a class of small, noncoding RNA molecules involved in carcinogenesis. Genetic variations in miRNA processing genes may affect the biogenesis of miRNAs, and consequently affect miRNAs regulation and development and progression of human cancer. Therefore, we hypothesized that polymorphisms in two main miRNA biosynthesis genes (DROSHA and DICER) may modulate the survival of advanced non-small cell lung cancer (NSCLC) patients in China. We selected 36 common tagging SNPs in DROSHA and DICER and evaluated the associations of these SNPs with survival of advanced NSCLC patients by a two-stage study in Chinese Han population (discovery cohort: 303 patients; replication cohort: 340 patients). Thirty-six SNPs were detected in the discovery cohort and 12 promising SNPs were validated in the replication cohort. The results showed that DROSHA rs3805525 was marginally associated with the survival of NSCLC patients in the replication cohort (dominant model: HR 0.69, 95 % CI 0.46–1.03, P = 0.071), which was in the same direction as that in the discovery cohort. When combing all patients into one group, three SNPs (rs3805525, rs17410035 and rs7719497) in DROSHA showed significantly associations with NSCLC survival (additive model: HR 0.82, 95 % CI 0.68–0.99 for rs3805525; HR 0.79, 95 % CI 0.62–1.00 for rs17410035; HR 0.76, 95 % CI 0.62–0.93 for rs7719497). Additionally, the combined analysis of those three SNPs showed a significant locus-dosage effect between number of favorable alleles and death risk of NSCLC (Trend P = 0.002). Genetic variations in DROSHA might be associated with the survival of advanced NSCLC patients in Chinese population.