Preparation and photocatalytic activity of a novel BiOCl/g‑C3N4 thin film prepared via spin coating

Wei‑Qin Cai,De‑Fang Zhang,Feng‑Jun Zhang,Won‑Chun Oh 한국세라믹학회 2020 한국세라믹학회지 Vol.57 No.3

Novel BiOCl/g-C3N4 thin film photocatalysts were synthesized via a simple two-step spin coating method. The prepared photocatalysts were characterized by X-ray diffraction, scanning electron microscopy, and ultraviolet–visible spectroscopy. The photocatalytic activity of the thin films for the degradation of rhodamine B under visible light (λ ≥ 400 nm) was investigated. The results showed that the BiOCl/g-C3N4 thin film photocatalysts exhibited significantly improved visible light absorption compared to the pure BiOCl thin film. The BiOCl/g-C3N4 film showed a rhodamine B degradation efficiency of 81.0% under visible light, which is 23.8 times higher than that of the pure BiOCl thin film. This excellent photocatalytic activity of the BiOCl/g-C3N4 film can be attributed to its efficient electron–hole separation due to the presence of g-C3N4.

Identification of candidate odorant‐degrading enzyme genes in the antennal transcriptome of Aphidius gifuensis

Kang Zhi‐Wei,Liu Fang‐Hua,Xu Yong‐Yu,Cheng Jia‐Hui,Lin Xiao‐Li,Jing Xiang‐Feng,Tian Hong‐Gang,Liu Tong‐Xian 한국곤충학회 2021 Entomological Research Vol.51 No.1

Odorant‐degrading enzymes (ODEs) have been found in insect antennae and play a critical role in signal chemical degradation once the message is conveyed. Significant progress has been made in characterizing ODEs in a variety of pests but very little is known in their natural enemies. We have carried out an antennae‐ and sex‐specific transcriptome of Aphidius gifuensis, a natural enemy of aphid, to identify the candidate ODEs. Based on the antennae‐ and sex‐specific transcriptome, a total of 100 putative ODEs were identified including one aldehyde oxidase (AOX), four alcohol dehydrogenases (ADs), eight UDP‐glucuronosyltransferases (UGTs), 45 cytochrome P450 (P450s), nine glutathione S‐transferases (GSTs) and 40 carboxylesterases (CCEs or CXEs). Additionally, we used RT‐qPCR to determine the expression profiles of these genes in tissues of both sexes. Based on the phylogenic analysis and tissue‐expression patterns, AgifEstE4, AgifCXE3, AgifCCE4, AgifCCE7, and AgifCCE18 were suggested as key ODEs in A. gifuensis. In addition, the female or male specifically enriched genes, such as AgifCCE17, AgifEstB1, AgifCYP18a1, AgifUGT2C2, were also considered to involve in the chemosensory processing in A. gifuensis. This study not only identified the candidate ODEs in A. gifuensis but also provided source for further exploration of the molecular mechanisms of chemical signal transductions in A. gifuensis, as well as other hymenopteran species.

Three species of the family Noctuidae (Lepidoptera) new to China

Hui-Lin HAN,Zhao-Yao DUAN,Zhi-Wei FENG2 한국곤충학회 2008 Entomological Research Vol.38 No.3

Three species of the family Noctuidae –- Phlogophora striatovirens (Moore, 1867), Usbeca kulmburgi (Rebel, 1918) and Feliniopsis leucostigma (Moore, 1867) –- are reported for the first time from China. Photographs of adults and genital characteristics are provided.

Concurrent Weekly Docetaxel Chemotherapy in Combination with Radiotherapy for Stage III and IVA-B Nasopharyngeal Carcinoma

Wei, Wei-Hong,Cai, Xiu-Yu,Xu, Tao,Zhang, Guo-Yi,Wu, Yong-Feng,Feng, Wei-Neng,Lin, Li,Deng, Yan-Ming,Lu, Qiu-Xia,Huang, Zhe-Li Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.3

Background and Purpose: Cisplatin is the most common chemotherapeutic agent for loco-regionally advanced nasopharyngeal carcinoma (NPC); however, toxicity is a limiting factor for some patients. We retrospectively compared the efficacy and toxicity of weekly docetaxel-based and cisplatin-based concurrent chemoradiotherapy in loco-regionally advanced NPC. Methods and Materials: Eighty-four patients with Stage III and IVA-B NPCs, treated between 2007 and 2008, were retrospectively analyzed. Thirty received weekly docetaxel-based concurrent chemotherapy, and 43 were given weekly cisplatin-based concurrent chemotherapy. Radiotherapy was administered using a conventional technique (seven weeks, 2.0 Gy per fraction, total dose 70-74 Gy) with 6-8 Gy boosts for some patients with locally advanced disease. Results: Median follow-up time was 42.3 months (range, 8.6-50.8 months). There were no significant differences in the 3-year loco-regional failure-free survival (85.6% vs. 92.3%; p=0.264), distant failure-free survival (87.0% vs. 92.5%; p=0.171), progression-free survival (85.7% vs. 88.4%; p=0.411) or overall survival (86.5% vs. 92.5%, p=0.298) of patients treated concurrently with docetaxel or cisplatin. Severe toxicity was not common in either group. Conclusions: Weekly docetaxel-based concurrent chemoradiotherapy is potentially effective and has a tolerable toxicity; however, further investigations are required to determine if docetaxel is superior to cisplatin for advanced stage NPC.

視覺傳達設計中傳統圖形符號應用研究

웨이웨이펑 ( Wei Wei Feng ) 한국동양예술학회 2020 동양예술 Vol.47 No.-

전통적인 도형과 문화 기호는 시각적 전달 디자인 발전의 중요한 표현 매개체이자 사회화 발전에서 사람들의 생활수준을 향상시키는 밀접한 기호이다. 역할을 통해 시각적 전달 디자인 응용 공간을 넓힌 결과이자 문화적 기호 영향을 받아 시각적으로 디자인의 의미와 응용을 바탕으로 하는 시각디자인 효과로 중국 시각전달 산업의 발전에 적극적인 추진 역할을 한다. 전통 문화는 문화에 부합되는 한 가지로서 깊은 시대적 의미와 가치를 가진다. 그러나 현대 부호의 시각 디자인에 도안과 부호의 다차원 변화가 존재한다. 전통적인 도안 기호는 시각 디자인에 깊은 영향을 미친다. 실제 응용과 응용 전략에 대한 분석은 반드시 예술적 의미 표현에 융합된 특성, 디자인의 운반체와 본체를 포함한다. 도안과 문화 기호 결과는 새로운 높이에 이르렀다. 본고는 중국 전통 도형 기호의 역사 배경을 논술하면서 전통적인 도형 기호의 의미, 특징과 변천 과정을 제시하여 전통적인 도형 기호의 철학 사상에 대해 문화를 논술하고 중국 문화의 철학 사상과 도안 기호에 대해 관련 해석을 한다. 전개 논술 전통적인 도안 기호는 시각적 전달 디자인 응용 형식에서 표현되고 도안 부호 형식의 자연, 생각, 교차 재구성 세 가지 측면에서 논술한다. 마지막으로 도안 기호의 미래 발전에 대해 개인적인 전망과 정리를 한다. 본 연구는 시각적 전달 디자인의 관련 특징을 착안점으로 삼아 실제적인 시각전달 디자인 실천에서 문화 기호의 뚜렷한 가치를 논술하는 중심으로 설계자가 타당성 있는 참고를 제공하는 것으로 간주한다. Traditional graphics and cultural symbols are important performance carriers for the development of visual communication design. They are also closely related to the improvement of people's living standards in the process of social development. In terms of function, it is the result of expanding the application space of visual communication design and the visual design effect based on the connotation and application of visual communication design under the influence of cultural symbols, which has a positive role in promoting the development of visual communication industry in China. Traditional culture, as a kind of cultural conformity, has its profound connotation and value of the times. However, there are multi-dimensional changes in patterns and symbols in modern symbol visual design. Traditional pattern symbols have a profound impact on visual design. Practical application and application strategy analysis are bound to be in the expression of artistic connotation, with its integration characteristics, the design carrier and ontology are transmitted The result of unified pattern and cultural symbol reached a new height. This paper starts with the historical background of Chinese traditional graphic symbols, puts forward the connotation, characteristics and evolution process of traditional graphic symbols, expounds the philosophical thoughts of traditional graphic symbols in culture, and explains the philosophical thoughts and graphic symbols of Chinese culture in relation. This paper expounds the application form of traditional pattern symbols in visual communication design, and discusses from three aspects: the nature, the idea and the cross reconstruction of pattern symbols. At last, the author makes a personal outlook and summary on the future development of graphic symbols. This study takes the relevant characteristics of visual communication design as the starting point, and in the actual practice of visual communication design, focuses on the outstanding value of cultural symbols, so as to provide feasible reference for designers.

MiR-21 Upregulation Induced by Promoter Zone Histone Acetylation is Associated with Chemoresistance to Gemcitabine and Enhanced Malignancy of Pancreatic Cancer Cells

Song, Wei-Feng,Wang, Lei,Huang, Wei-Yi,Cai, Xun,Cui, Jiu-Jie,Wang, Li-Wei Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.12

Background and Aims: MicroRNA-21 (miR-21) is reported to be overexpressed and to contribute to proliferation, apoptosis and gemcitabine resistance in pancreatic ductal adenocarcinomas (PDACs). The aims of this study were to explore regulation of miR-21 expression by epigenetic change and its impact on chemoresistance and malignant properties of of pancreatic cancer. Materials and methods: We retrospectively collected 41 cases of advanced pancreatic cancer patients who were sensitive or resistant to gemcitabine and assessed levels of serum circulating miR-21 for correlation with cytotoxic activity. Histone acetylation in the miR-21 promoter was also studied in gemcitabine-sensitive and gemcitabine-resistant PDAC cells. Gemcitabine-resistant HPAC and PANC-1 cells were transfected with pre-miR-21 precursors (pre-miR-21) and antisense oligonucleotides (anti-miR-21), and were treated with TSA. Finally, invasion and metastasis assays were performed and alteration in mir-21, PTEN, AKT and pAKT level was evaluated in these cells. Results: Serum miR-21 levels were increased in gemcitabine-resistant PDAC patients compared with gemcitabine-sensitive subjects. The miR-21 levels were increased in 6 PDAC cells treated with gemcitabine significantly, associated with 50% inhibitory concentrations ($IC_{50}s$). Histone acetylation levels at miR-21 promoter were increased in PDAC cells after treatment with gemcitabine. Enhanced invasion and metastasis, increased miR-21 expression, decreased PTEN, elevated pAKT level were demonstrated in gemcitabine-resistant HPAC and PANC-1 cells. Pre-miR-21 transfection or TSA treatment further increased invasion and metastasis ability, decreased PTEN, and elevated pAKT levels in these two lines. In contrast, anti-miR-21 transfection could reverse invasion and metastasis, and PTEN and pAKT expressions induced by gemcitabine. Conclusions: MiR-21 upregulation induced by histone acetylation in the promoter zone is associated with chemoresistance to gemcitabine and enhanced malignant potential in pancreatic cancer cells.

Kinetics studies of dimethyl carbonate synthesis from urea and methanol over ZnO catalyst

Wei Wei,Junliang Zhang,Feng Wang,Fukui Xiao,Yuhan Sun 한국화학공학회 2010 Korean Journal of Chemical Engineering Vol.27 No.6

A kinetic experiment of dimethyl carbonate (DMC) synthesis by urea methanol over ZnO catalyst was carried out in an isothermal fixed-bed reactor. A kinetic model based on the mole fraction was proposed and the kinetic parameters were estimated from the experimental results. The model predictions were compared with the experimental data and fair agreements were found. The effects of the reaction temperature (443-473 K), space time (0-4.7 h mol−1kgcat) and urea mass percent (5-9%) in feed on DMC mole fraction were investigated. It was found that the reactions are mainly influenced by the reaction temperature and space time rather than urea mass percent in feed. The experimental and simulated results indicated that the reaction from MC to DMC was the rate-controlling step in the DMC synthesis process from urea and methanol. It is important to remove the DMC and byproduct ammonia to achieve a high selectivity of DMC. This implies that reactive distillation might be used in the DMC synthesis on an industrial scale to achieve a higher selectivity of DMC.

Postoperative Radiotherapy Improves Survival in Gastric Signet-Ring Cell Carcinoma: a SEER Database Analysis

Wei, Feng,Lyu, Hongwei,Wang, Shuoer,Chu, Yan,Chen, Fengyuan The Korean Gastric Cancer Association 2019 Journal of gastric cancer Vol.19 No.4

Purpose: To identify the potential therapeutic role of postoperative radiotherapy (RT) in patients with locally advanced (stage II and stage III) gastric signet ring cell carcinoma (SRC). Materials and methods: Patients with locally advanced gastric SRC from the Surveillance, Epidemiology, and End Results program database between 2004 and 2012 were included in our study. Univariate and multivariate Cox proportional models were performed, and survival curves were generated to evaluate the prognostic effect of postoperative RT and surgery alone on SRC patients. Propensity score matching (PSM) was used to avoid selection bias among the study cohorts. Results: We found that patients with postoperative RT had better probability of survival compared with those who did not receive RT (overall survival [OS], P<0.001; cancer-specific survival [CSS], P<0.001). After PSM, analysis of both overall and CSS showed that patients who underwent postoperative RT had better prognosis than those receiving surgery alone in the matched cohort (OS, P=0.00079; CSS, P=0.0036). Multivariate Cox proportional model indicated that postoperative RT had better effect on prognosis compared with surgery alone with respect to both overall (hazard ratio [HR], 0.716; 95% confidence interval [95% CI], 0.590-0.87; P=0.001) and CSS (HR, 0.713; 95% CI, 0.570-0.890; P=0.003). Conclusions: Postoperative RT had better prognosis compared with surgery alone for both overall and CSS for patients with locally advanced gastric SRC.

Home Energy Management System for Interconnecting and Sensing of Electric Appliances

( Wei-ting Cho ),( Chin-feng Lai ),( Yueh-min Huang ),( Wei-tsong Lee ),( Sing-wei Huang ) 한국인터넷정보학회 2011 KSII Transactions on Internet and Information Syst Vol.5 No.7

Due to the variety of household electric devices and different power consumption habits of consumers at present, general home energy management (HEM) systems suffer from the lack of dynamic identification of various household appliances and a unidirectional information display. This study presented a set of intelligent interconnection network systems for electric appliances, which can measure the power consumption of household appliances through a current sensing device based on OSGi platform. The system establishes the characteristics and categories of related electric appliances, and searches the corresponding cluster data and eliminates noise for recognition functionality and error detection mechanism of electric appliances by applying the clustering algorithm. The system also integrates household appliance control network services so as to control them according to users` power consumption plans or through mobile devices, thus realizing a bidirectional monitoring service. When the system detects an abnormal operating state, it can automatically shut off electric appliances to avoid accidents. In practical tests, the system reached a recognition rate of 95%, and could successfully control general household appliances through the ZigBee network.

Fracture Behaviour and Design of Steel Tensile Connections with Staggered Bolt Arrangements

Feng Wei,Cheng Fang,Michael C. H. Yam,Yanyang Zhang 한국강구조학회 2015 International Journal of Steel Structures Vol.15 No.4

This paper presents an experimental, numerical, and reliability study on the fracture behaviour of bolted steel tensile connections with various bolt arrangements. A total of 36 full-scale specimens were tested under tension until fracture. The main test parameters included the geometric pattern of the connections and the connection details such as pitch, gauge, edge distance and material. The test results show that the predictions of the ultimate capacity based on the s2/4g rule can be conservative, which may be mainly due to the ‘reinforcement’ effect of the biaxial stress state that exists between the bolt holes. However, for the specimens fabricated using higher strength steel with lower ductility, the conservatism is reduced substantially. Moreover, the test efficiency, which is defined as the ratio of the test ultimate capacity over the theoretical capacity of the gross section, was also examined. A higher test efficiency can be found when the hole spacing/edge distance is decreased/increased, although substantial increase in the edge distance can be ineffective. In addition, less ductile steel can lead to lower test efficiency. Furthermore, a numerical study was undertaken, where good agreements were observed between the numerical and the test results. With available test data, reliability analysis was finally performed to re-examine the rationale behind the resistance factors used in the current design codes.