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Revealing efficient catalytic performance of N-CuO_(x) for aerobic oxidative coupling of aliphatic alkynes:A Langmuir-Hinshelwood reaction mechanism

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Nano Research 2022年第7期15卷 6076-6083页

作者： Jun Tang Bowen Jiao Wei Chen Fei Ruan Fengfeng Li Peixin Cui Chao Wan minh Ngoc ha Van Noi Nguyen Qingping Ke College of Chemistry and Chemical Engineering Anhui University of TechnologyMaanshan 243002China Key Laboratory of Carbon materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Sciencethe Chinese Academy of SciencesNanjing 210008China VNU Key Laboratory of Advanced material for Green Growth VNU University of ScienceVietnam National UniversityHanoi 100000Vietnam

O_(x)idative couplings of aliphatic alkynes are crucial for the production of naturally occurring 1,*** we report the novel approach for effective synthesis of unsaturated coordinated N doped copper oxides(N-CuO_(x))catalyst,and uncover that N-CuO_(x) catalyst as an additive-free and cost-effective heterogeneous catalyst has highly catalytic performance for directly oxidative coupling of aliphatic *** key to achieve efficient oxidative coupling of aliphatic alkynes is the synergistic effect of N species and uncoordinated O/Cu species caused by N dopants,which undergoes the Langmuir–Hinshelwood reaction *** N-CuO_(x) catalyst displays~89.1%yield for hexadeca-7,9-diyne under mild conditions and stable reusability(5 cycles),showing significant advances compared with the traditionally copper *** findings highlight the heteroatom dopants that provide a new methodology for designing efficient copper catalysts in synthesis of naturally occurring 1,3-diynes.

关键词： N doped copper oxides(N-CuO_(x)) straight chain alkynes homo-coupling additive-free 1,3-diynes

Facile Synthesis of Porous Carbon Nitride Spheres with Hierarchical Three-Dimensional mesostructures for CO_(2) Capture

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Nano Research 2010年第9期3卷 632-642页

作者： Qiang Li Jianping Yang Dan Feng Zhangxiong Wu Qingling Wu Sung Soo Park Chang-Sik ha Dongyuan Zhao Department of Chemistry and Shanghai Key Laboratory of molecularCatalysis and Innovative materials Laboratory of Advanced MaterialsFudan UniversityShanghai 200433China Department of Polymer Science and Engineering Pusan National UniversityGeumjeong-guBusan 609-735Korea

Porous carbon nitride(CN)spheres with partially crystalline frameworks have been successfully synthesized via a nanocasting approach by using spherical mesoporous cellular silica foams(mCFs)as a hard template,and ethylenediamine and carbon tetrachloride as *** resulting spherical CN materials have uniform diameters of ca.4μm,hierarchical three-dimensional(3-D)mesostructures with small and large mesopores with pore diameters centered at ca.4.0 and 43 nm,respectively,a relatively high BET surface area of~550 m^(2)/g,and a pore volume of 0.90 cm^(3)/***-resolution transmission electron microscope(HRTEm)images,wide-angle X-ray diffraction(XRD)patterns,and Raman spectra demonstrate that the porous CN material has a partly graphitized *** addition,elemental analyses,X-ray photoelectron spectra(XPS),Fourier transform infrared spectra(FT-IR),and CO_(2) temperature-programmed desorption(CO_(2)-TPD)show that the material has a high nitrogen content(17.8 wt%)with nitrogen-containing groups and abundant basic *** hierarchical porous CN spheres have excellent CO_(2) capture properties with a capacity of 2.90 mmol/g at 25℃and 0.97 mmol/g at 75℃,superior to those of the pure carbon materials with analogous *** can be mainly attributed to the abundant nitrogen-containing basic groups,hierarchical mesostructure,relatively high BET surface area and stable ***,the presence of a large number of micropores and small mesopores also enhance the CO_(2) capture performance,owing to the capillary condensation effect.

关键词： mesoporous materials carbon nitride nanocasting sphere hard template CO_(2)capture

Effects of moxibustion or moxa smoke on serum lipids and carotid plaque stability in atherosclerotic mice

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Journal of Traditional Chinese medical Sciences 2020年第3期7卷 325-332页

作者： Rui Zhang Lue ha Rui He Yueping Huang hao Wang Baixiao Zhao School of Acupuncture-moxibustion and Tuina Beijing University of Chinese MedicineBeijing100029China

Objective:To observe the effects of moxibustion or moxa smoke on serum lipids,aorta and liver pathology,and carotid plaque stability in ***:Fifty-four 8-week-old ApoE^-/- mice were randomly divided into three groups(untreated,moxibustion,and moxa smoke)and received a high-fat *** wild-type C57 BL/6 mice of the same age were used as *** intervention(none,moxibustion between the nipples,or 10 e15 mg/m^3 moxa smoke)was applied to restrained mice 20 min per day,six days per week,for 12 *** the end of the experimental period,we measured serum lipids and apolipoprotein,stained thoracic aortas and livers to observe pathological changes,and used immunohistochemical staining to assess the levels of a-smooth muscle actin,CD68,tumor necrosis factor-α,nuclear transcription factor-κB,and P38 mitogen-activated protein *** also measured the levels of matrix metalloproteinase-2 and 9 and tissue metalloproteinase ***:After 12 weeks,lipid metabolism disorder and atherosclerotic plaques were observed in the ApoE^-/- *** or moxa smoke reduced the levels of serum total cholesterol,triglycerides,low density lipoprotein,and very low density lipoprotein but did not affect the levels of high density lipoprotein,apolipoprotein A1,or oxidized low density *** or moxa smoke suppressed pathological changes in thoracic aortas and livers,increased fiber cap thickness,the fiber cap thickness/intimal medial thickness ratio,and collagen area percentage,and reduced extracellular *** with moxibustion or moxa smoke increased a-smooth muscle actin and reduced CD68 and the vulnerability index,suppressed tumor necrosis factor-α and nuclear transcription factor-κB expression,and did not affect P38 mitogen-activated protein kinase *** lowered the levels of matrix metalloproteinase-2 and 9 and increased those of tissue metalloproteinase ***:moxibustion or moxa smo

关键词： Atherosclerosis matrix metalloproteinase Vulnerability index Tissue metalloproteinase inhibitor

Application of powdered activated carbon coating to fabrics in a hybrid filter to enhance mercury removal

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Journal of Environmental Sciences 2019年第6期31卷 58-65页

作者： Jin-Ho Sung Seung-Ki Back Eun-Song Lee ha-Na Jang Yong-Chil Seo Youn-Suk Kang myong-Hwa Lee Department of Environmental Engineering Yonsei University J-E Tech Co. Ltd Department of Environmental Engineering Kangwon National University

Elemental mercury(Hg0) is predominant constituent of flue gas emitted from coal-fired power plants. Adsorption has been considered the best available technology for removal of Hg0 from flue gas. However, adsorbent injection increases the amount of ash generated. In the present study, powdered activated carbon(PAC) was coated on polytetrafluoroethylene/glass fiber filters to increase Hg0 removal while concurrently reducing the amount of ash generated. The optimal PAC coating rate was determined in laboratory experiments to ensure better Hg0 removal with low pressure drop. When PAC of particle size less than 45 μm was used, and the areal density was 50 g/m2, the pressure drop remained under 30 Pa while the Hg0 removal efficiency increased to 15.8% from4.3%. The Hg0 removal efficiency also increased with decrease in filtration velocity. The optimal PAC coating rate was applied on a hybrid filter(HF), which was combined with a bag filter and an electrostatic precipitator in a single chamber. Originally designed to remove fine particulates matter, it was retrofitted to the flue gas control device for simultaneous Hg0 removal. By employing the PAC coating, the Hg removal efficiency of the HF increased to 79.79% from 66.35%. also, a temporary reduction in Hg removal was seen but this was resolved following a cleaning cycle in which the dust layer was removed.

关键词： mercury Hybrid filter Activated carbon Coating filter Coal-fired power plant

Comparison of the meibomian gland dysfunction in patients with chronic ocular graft-versus-host disease and Sjogren's syndrome

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International Journal of Ophthalmology(English edition) 2019年第3期12卷 393-400页

作者： Won Choi Jun Young ha Ying Li Jung han Choi Yong Sok Ji Kyung Chul Yoon Department of Ophthalmology and Research Institute of medical Sciences Chonnam National University Medical School and Hospital

AIm: To investigate the abnormalities in the meibomian gland in patients with dry eye disease(DED) associated with chronic ocular graft-versus-host disease(coGVHD) in comparison with Sj?gren's syndrome(SS), a major form of aqueous deficient DED and meibomian gland dysfunction(mGD), a common cause of evaporative ***: A total 135 eyes of 135 subjects included in this study: patients with DED associated with coGVHD(n=30), patients with SS(n=35), patients with mGD(n=35), and normal controls(n=35). all participants completed the Ocular Surface Disease Index(OSDI) questionnaire, ocular surface examination [Schirmer test, tear film breakup time(TFBUT), and ocular surface staining], and meibomian gland assessment [meiboscore(gland dropout detected on meibography using infrared camera of the Keratograph 5 m), meibum expressibility score(mES), meibum quality score(mQS), lid margin abnormality]. In addition, correlations of meibomian gland characteristics with ocular surface parameters as well as disease severity score were investigated in coGVHD ***: The coGVHD group showed significantly higher meiboscore, mES, and mQS than the other 3 groups(all Pmeters of meibomian gland showed a significant correlation each other and those of ocular surface. The correlation between meibomian gland parameters and severity score of co GVHD was also established(meiboscore, r=0.62; mES, r=0.47; mQS, r=0.47; lid margin abnormality score, r=0.55; all Pmorphology and worse glandfunction than other types of DED. In addition, meibomian gland damage is not only associated with ocular surface damage but also disease severity of coGVHD.

关键词： chronic ocular graft-versus-host disease Sjogren's syndrome dry eye disease meibomian gland dysfunction meibography

Design of small-area and high-efficiency DC-DC converter for 1 T SRAm

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Journal of Central South University 2012年第2期19卷 417-423页

作者： LEE Jae-hyung 金丽妍余忆宁 JANG Ji-hye KIm Kwang-il ha Pan-bong KIm Young-hee Department of Electronic Engineering Changwon National University9 Sarim-Dong

The direct current-direct current （DC-DC） converter is designed for 1 T static random access memory （SRAm） used in display driver integrated circuits （ICs）, which consists of positive word-line voltage （VpwL）, negative word-line voltage （VinyL） and half-VDD voltage （VHDo） generator. To generate a process voltage temperature （PVT）-insensitive VpWL and VNWL, a set of circuits were proposed to generate reference voltages using bandgap reference current generators for respective voltage level detectors. also, a VOWL regulator and a VNWL charge pump were proposed for a small-area and low-power design. The proposed VpwL regulator can provide a large driving current with a small area since it regulates an input voltage （VCI） from 2.5 to 3.3 V. The VmvL charge pump can be implemented as a high-efficiency circuit with a small area and low power since it can transfer pumped charges to VNWL node entirely. The DC-DC converter for 1 T SRAm were designed with 0.11 μm mixed signal process and operated well with satisfactory measurement results.

关键词： 1 T-static random access memory direct current-direct current converter positive word-line voltage negative word-line voltage half- VDb generator

Deep Learning and machine Learning for Early Detection of Stroke and haemorrhage

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Computers, materials & Continua 2022年第7期72卷 775-796页

作者： Zeyad Ghaleb al-mekhlafi Ebrahim m.hammed Senan Taha H.Rassem Badiea Abdulkarem m.hammed Nasrin m.makbol Adwan alownie alanazi Tariq S.almurayziq Fuad A.Ghaleb Department of Information and Computer Science College of Computer Science and EngineeringUniversity of Ha’ilHa’il81481Saudi Arabia Department of Computer Science&Information Technology Dr.Babasaheb Ambedkar Marathwada UniversityAurangabad431004India Faculty of Science and Technology Bournemouth UniversityPooleBH125BBUK Department of Computer Engineering College of Computer Science and EngineeringUniversity of Ha’ilHa’il81481Saudi Arabia College of Computer Science and Engineering Hodeidah UniversityHodeidah966Yemen School of Computing Faculty of EngineeringUniversiti Teknologi MalaysiaJohor BahruJohor81310Malaysia

Stroke and cerebral haemorrhage are the second leading causes of death in the world after ischaemic heart *** this work,a dataset containing medical,physiological and environmental tests for stroke was used to evaluate the efficacy of machine learning,deep learning and a hybrid technique between deep learning and machine learning on themagnetic Resonance Imaging(mRI)dataset for cerebral *** the first dataset(medical records),two features,namely,diabetes and obesity,were created on the basis of the values of the corresponding *** t-Distributed Stochastic Neighbour Embedding algorithm was applied to represent the high-dimensional dataset in a low-dimensional data ***,the Recursive Feature Elimination algorithm(RFE)was applied to rank the features according to priority and their correlation to the target feature and to remove the unimportant *** features are fed into the various classification algorithms,namely,Support Vector machine(SVm),K Nearest Neighbours(KNN),Decision Tree,Random Forest,and multilayer *** algorithms achieved superior *** Random Forest algorithm achieved the best performance amongst the algorithms;it reached an overall accuracy of 99%.This algorithm classified stroke cases with Precision,Recall and F1 score of 98%,100%and 99%,*** the second dataset,the mRI image dataset was evaluated by using the alexNet model and alexNet+SVm hybrid *** hybrid model alexNet+SVm performed is better than the alexNet model;it reached accuracy,sensitivity,specificity and Area Under the Curve(AUC)of 99.9%,100%,99.80%and 99.86%,respectively.

关键词： Stroke cerebral haemorrhage deep learning machine learning t-SNE and RFE algorithms

“One stone,two birds”solvent system to fabricate microcrystalline cellulose–Ti_(3)C_(2)T_(x)nanocomposite film as a flexible dielectric and thermally conductive material

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Nano Research 2023年第2期16卷 3240-3253页

作者： Yong-Zhu Yan Shuwei Li Sung Soo Park Wei-Jin Zhang Jun Seok Lee Jung Rae Kim Dong Gi Seong Chang-Sik ha Department of Polymer Science and Engineering School of Chemical EngineeringPusan National UniversityBusan 46241Republic of Korea School of Chemical and Biomolecular Engineering Pusan National UniversityBusan 46241Republic of Korea Division of Advanced materials Engineering Dong-Eui UniversityBusan 47340Republic of Korea

A strategy for fabricating microcrystalline cellulose–Ti_(3)C_(2)T_(x)(mCC–mXene)nanocomposite films with high relative permittivity,high thermal conductivity,and excellent mechanical properties was *** mCC–mXene nanocomposite film was fabricated by casting a solution containing N,N-dimethylacetamide/lithium chloride(DmAc/LiCl)-soluble mCC and DmAcdispersible mXene nanosheets,followed by humidity control *** mXene nanosheets greatly enhanced the permittivity of the nanocomposite films owing to interfacial ***,the nanocomposite film with 20 wt.%mXene content achieved a desirable permittivity of 71.4 at 102 Hz(a 770%improvement against that of neat cellulose),while the dielectric loss only increased by 1.8 times(from 0.39 to 0.70).The obtained nanocomposite films with 20 wt.%and 30 wt.%mXene exhibited remarkable in-plane thermal conductivities of 8.523 and 9.668 W∙m^(−1)∙K^(−1),respectively,owing to the uniform dispersion and selfalignment of the mXene layered ***,the uniformly dispersed mXene nanosheets in the mCC network with interfacial interaction(hydrogen bonding)and mechanical entanglement endowed the nanocomposite films with excellent mechanical properties and ***,the thermal stability,water resistance,and antibacterial properties of the nanocomposite films were effectively improved with the introduction of ***,using DmAc/LiCl as the solvent system not only improves the compatibility between mCC and mXene but also avoids the problem of easy oxidation of mXene in aqueous *** the high stability of the mCC–mXene solution and enhanced properties of the mCC–mXene films,the proposed strategy manifests great potential for fabricating natural biomass-based dielectric materials.

关键词： Ti_(3)C_(2)T_(x) microcrystalline cellulose flexible dielectric thermally conductive N,N-dimethylacetamide/lithium chloride(DmAc/LiCl) compatibility

Comparison of the clinical efficacy of medical treatment of symptomatic benign prostatic hyperplasia between normal and obese patients

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Asian Journal of Andrology 2011年第5期13卷 728-731页

作者： Seung Hwan Lee Cheol Young Oh Kyung Kgi Park mutt Su Chung Se Jeong Yoo Byung ha Chung Department of Urology Yonsei University Health System Seoul Korea Department of Urology Hallym University Anyang 431-070 Chuncheon

We aimed to investigate the difference in efficacy of medical treatment of symptomatic benign prostatic hyperplasia （BPH） between normal and obese patients with BPH; obesity was determined by either body mass index （BmI） or waist circumference （WC）. In this 12-week prospective observational study, a total of 175 patients aged ≥40 years with International Prostate Symptom Scores （IPSS） ≥12 points and prostate volume≥20 ml were prospectively enrolled. The patients were divided into two groups according to BmI or WC. Patients received the doxazosin gastrointestinal therapeutic system （GITS） at a dose of 4 mg once per day for 12 weeks. The changes from baseline in the IPSS, maximal urinary flow rate （Qmax）, post-void residual volume, quality of life （QoL） scores and adverse events （AEs） were analysed. Of the 175 enrolled patients, 132 completed the study. Sixty-seven patients had BmI 〉23 kg m-2, and 43 had WC 〉90 cm. Obese patients represented by WC 〉90 cm or BmI≥ 23 kg m-2 had a significantly greater prostate volume compared with non-obese patients at baseline. Total IPSS was significantly higher in the WC 〉90 cm group compared to the WC ≤ 90 cm group. Total I PSS was positively correlated with prostate volume （P=-0.031） and WC （P=0.045）. all groups showed significant improvements in total IPSS and QoL at 12 weeks. However, the improvement of total IPSS was greater in the high-BmI and high-WC groups. The most frequent AE was dizziness （n= 13）, and it was significantly lower in the obese BPH patients. Obesity was associated with increased prostate volume and lower urinary tract symptoms. alpha-blockers appear to be efficacious for controlling symptoms, especially in obese men.

关键词： alpha-blocker benign prostatic hyperplasia body mass index prostate waist circumference