检索结果-南通市图书馆

Sprayed PAA-CaO_(2)nanoparticles combined with calcium ions and reactive oxygen species for antibacterial and wound healing

在线全文

学校读者我要写书评

暂无评论

Regenerative Biomaterials 2023年第1期10卷 1356-1371页

作者： Hong yu Jiale Sun Kepeng She Mingqi lv Yiqiao Zhang Yawen Xiao Yangkun liu Changhao Han Xinyue Xu Shuqing Yang Guixue Wang Guangchao Zang Tissue and Cell Biology Lab Teaching&Management CenterChongqing Medical UniversityChongqing 400016China Chongqing University Central Hospital Chongqing Emergency Medical CenterChongqing 400030China Key laboratory for Biorheological Science and Technology of Ministry of Education State and Local Joint Engineering Laboratory for Vascular ImplantsBioengineering College of Chongqing UniversityChongqing 400030China Jinfeng laboratory Chongqing 401329China

The most common socioeconomic healthcare issues in clinical are burns,surgical incisions and other skin *** lesion healing can be achieved with nanomedicines and other drug application *** study developed a nano-spray based on cross-linked amorphous calcium peroxide(CaO_(2))nanoparticles of polyacrylic acid(PAA)for treating skin wounds(PAA-CaO_(2)nanoparticles).CaO_(2)serves as a‘drug’precursor,steadily and continuously releasing calcium ions(Ca^(2+))and hydrogen peroxide(H_(2)O_(2))under mildly acidic conditions,while PAA-CaO_(2)nanoparticles exhibited good spray behavior in aqueous *** demonstrated that PAA-CaO_(2)nanoparticles exhibited low cytotoxicity and allowed l929 cells proliferation and migration in *** effectiveness of PAA-CaO_(2)nanoparticles in promoting wound healing and inhibiting bacterial growth in vivo was assessed in SD rats using full-thickness skin defect and Staphylococcus aureus(***)-infected wound models based *** results revealed that PAA-CaO_(2)nanoparticles demonstrated significant advantages in both ***,the infected rats’skin defects healed in 12 *** benefits are linked to the functional role of Ca^(2+)coalesces with H_(2)O_(2)as known antibacterial and healing-promoted ***,we developed nanoscale PAA-CaO_(2)sprays to prevent bacterial development and heal skin lesions.

关键词： polyacrylic acid calcium peroxide nanomedicines antibacterial wound healing

Purification of starch and phosphorus wastewater using core-shell magnetic seeds prepared by sulfated roasting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第7期31卷 4-16页

作者： Chunjie Du Jinsheng yu Wei Sun Haisheng Han yuehua Hu Pan Chen Panpan Hou Runqing liu li Wang yue Yang Ruohua liu lei Sun School of Minerals Processing and Bioengineering Central South University Key laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources Central South University

Core-shell magnetic seeds with certain adsorption capacity that were prepared by sulfated roasting, served as the core of a magnetic separation technology for purification of starch wastewater. XRD and SEM results indicate that magnetite's surface transformed to be porous α-Fe_2O_3 structure. Compared with magnetite particles, the specific surface area was significantly improved to be 8.361 from 2.591 m^2/g, with little decrease in specific susceptibility. Zeta potential, FT-IR and XPS experiments indicate that both phosphate and starch adsorbed on the surface of the core-shell magnetic seeds by chemical adsorption, which fits well with the langmuir adsorption model. The porous surface structure of magnetic seeds significantly contributes to the adsorption of phosphate and starch species, which can be efficiently removed to be 1.51 mg/l(phosphate) and 9.51 mg/l(starch) using magnetic separation.

关键词： Core-shell magnetic seeds Sulfated roasting Phosphate Starch Purification

PROBE FOR THE FORMATION RATIO BETWEEN EXCITED TRIPlETS AND SINGlETS AS GENERATED IN POlYMER lIGHT-EMITTING DIODES

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2001年第6期19卷 591-596页

作者： Jing-ying Zhang Shi-dong Kan yu-guang Ma Jia-cong Shen Key lab for Supramolecular Structure and Spectroscopy of Ministry of Education, Jilin University Changchun 130023, China Jilin Univ Key Lab Supramol Struct & Spect Minist Educ Changchun 130023 Peoples R China

The electroluminescence (El) produced by a highly luminescent phosphorescent dye Cu-4(CdropCPh)(4)l-2 (l = 1.8-bis(di-phenylphosphino)-3,6-dioxaoctane, Cu-4) doped polymer as emitting layer is reported. The effects of the charge injection balance on the polymers, in particular, poly(N-vinylcarbazole) (PVK) have been studied by using photoluminescence and electroluminescence spectroscopy. Changes in the emission spectra demonstrate the influence of the charge injection balance on the formation ratio of triplet and singlet excitons. This provides a new technical approach to realize the color patterning in polymer lEDs.

关键词： electroluminescence organic polymer triplet exciton

Blood lead level in Chinese adults with and without coronary artery disease

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2021年第11期18卷 857-866页

作者： Shi-Hong lI Hong-Ju ZHANG Xiao-Dong lI Jian CUI yu-Tong CHENG Qian WANG Su WANG Chayakrit Krittanawong Edward A El-Am Rody G.Bou Chaaya Xiang-yu WU Wei GU Hong-Hong lIU Xian-liang YAN Zhi-Zhong lI Shi-Wei YANG Tao SUN Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityBeijingChina Department of Echocardiography Beijing Children’s HospitalCapital Medical UniversityNational Center for Children’s HealthBeijingChina Department of Cardiology Shougang Changzhi Steel HospitalChangzhiChina Department of Cardiology Baylor College of MedicineHoustonUSA Department of Medicine Indiana University School of MedicineIndianapolisUSA

BACKGROUND The Trial to Assess Chelation Therapy study found that edetate disodium(disodium ethylenediaminetet-raacetic acid)chelation therapy significantly reduced the incidence of cardiac events in stable post-myocardial infarction patients,and a body of epidemiological data has shown that accumulation of biologically active metals,such as lead and cadmium,is an important risk factor for cardiovascular ***,limited studies have focused on the relationship between angiograph-ically diagnosed coronary artery disease(CAD)and lead *** study compared blood lead level(Bll)in Chinese pa-tients with and without *** In this prospective,observational study,450 consecutive patients admitted to Beijing Anzhen Hospital with sus-pected CAD from November 1,2018,to January 30,2019,were *** patients underwent coronary angiography,and an experienced heart team calculated the SYNTAX scores(SXscore)for all available coronary *** were determined with atomic absorption spectrophotometry and compared between patients with angiographically diagnosed CAD and those without *** In total,343(76%)patients had CAD,of whom 42%had low(0−22),22%had intermediate(23−32),and 36%had high(≥33)*** were 36.8±16.95μg/l in patients with CAD and 31.2±15.75μg/l in those without CAD(P=0.003).When Blls were categorized into three groups(low,middle,high),CAD prevalence increased with increasing Blls(Pltivariate regression model,Blls were associated with CAD(odds ratio(OR):1.023,95%confidence interval(CI):1.008−1.039;P=0.0017).OR in the high versus low Bll group was 2.36(95%CI:1.29−4.42,P=0.003).Furthermore,Blls were independently associated with intermediate and high SXscore(adjusted OR:1.050,95%CI:1.036-1.066;PlUSION Blls were significantly associated with angiographically diagnosed ***,Blls showed excel-lent predictive value for SXscore,especially for complex coronary artery lesions.

关键词： coronary Blood admitted

Exposure to microplastics induces lower survival,oxidative stress,disordered microbiota and altered metabolism in the intestines of grass carp(Ctenopharyngodon idella)

在线全文

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2024年第5期9卷 785-794页

作者： Xuewen Jia Yang liu Yan He Hongyan yu yuting liu yubang Shen Xiaoyan Xu Jiale li Key laboratory of Freshwater Aquatic Genetic Resources Ministry of Agriculture and Rural Affairs Shanghai Ocean UniversityShanghai201306China National Demonstration Center for Experimental Fisheries Science Education Shanghai Ocean UniversityShanghai201306China Shanghai Engineering Research Center of Aquaculture Shanghai Ocean UniversityShanghai201306China

There are major gaps in illustrating the risk to freshwater fish that are exposed to environmental microplastics(MPs),even though MPs in freshwater environments has drawn much *** explore the potentially negative effects of microplastics on freshwater fish,grass carp(averaging 9.215±0.035g)were exposed to microplastics(32-40μm in diameter)at two environmental concentrations(100 and 1000μg/l)for 21 days,and evaluated for physio-biochemical performance,gut microbiome,and metabolome *** exposure,microplastics were detected in the intestine and within basal nuclei and goblet cells *** enzyme activities(superoxide dismutase and catalase)also significantly decreased within the intestines(Plysis,a decrease in diversity and richness was observed in the MPs-H and MPs-l *** abundance of opportunistic pathogens increased and beneficial bacteria decreased in both MP *** example,Acinetobacter and Bosea proportions were higher in the MPs-l group,while Bacteroides and Shewanella increased in the MPs-H ***,abundance of lactobacillus decreased both in the MPs-H and MPs-l *** analysis revealed primary bile acid biosynthesis metabolism upregulated in the MPs-l and purine metabolism downregulated in the MPs-H ***,an integration analysis of the gut microbiome and metabolomics identified significant associations between several bacteria taxa and metabolites related to intestinal *** together,these results highlighted the negative effects on intestinal morphology,oxidative stress,and microbiome and emphasized the relationship between microbiota and metabolites in response to microplastics,which could provide comprehensive insights into the potential risks of MPs on freshwater fish intestines.

关键词： Microplastics Oxidative stress Metabolomics Microbiome Grass carp Intestine

Velocity Distributions in the Bubble Column Reactor with Vertical Tube Bundles and lateral Internals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

华东理工大学学报（自然科学版） 2010年第2期36卷 172-172页

作者： ZHANG yu lU J ia l I Hong-bo WANG li-jun lI Xi Department of Chemical Engineering Zhejiang University Hangzhou 310027 China

Streptococcus agalactiae Anterior Cervical Space and Superior Mediastinum Abscess in a liver Transplant Recipient

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Infectious Microbes & Diseases 2019年第2期1卷 75-77页

作者： Derek l.l.Hung Man-Fai leung Jade l.l.Teng Herman Tse Susanna K.P.lau Patrick C.Y.Woo Department of Microbiology The University of Hong KongHong KongChina State Key laboratory of Emerging Infectious Diseases The University of Hong KongHong KongChina Carol yu Centre for Infection The University of Hong KongHong KongChina Public Health laboratory Services Branch Centre for Health ProtectionHong Kong Department of HealthThe University of Hong KongHong KongChina Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases The University of Hong KongHong KongChina

Introduction Streptococcus agalactiae is most commonly associated with pregnancy-related infections,neonatal sepsis,and infections in patients with immunocompromised states,such as diabetes mellitus and malignancies.1 Although abscesses caused by *** are sometimes encountered in immunocompromised patients,*** abscess in transplant recipients is extremely *** abscesses have never been reported in liver transplant *** this article,we report a case of *** abscess in the anterior cervical space extending to the superior mediastinum in a liver transplant recipient.

关键词： Streptococcus agalactiae liver transplant abscess

Self-Organized Hebbian learning of Visual Receptive Fields from Image Pyramids

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电路与系统学报 1997年第1期 8-14页

作者： D.Deng, K.P.Chan,Y. l.yu (Inst.of Electronics Engineering,South China Univ. Of Tech, Guanzhou 510641)(Dept. of Computer Science, Univ. Of Hong Kong, Pokfulam, HongKong)

It is found that simple cells in mammalian striact cortex act as feature detectors sensitive to both spatial orientation and spatial frequency, bearing strong statistical likelihood of Gabor filters. In this paper, a new computational model of Self-Organized Hebbian learning is proposed to work on a multi-resolution image pyramid for the problem of visual receptive field learning, so as to produce receptive fields of both orientation and spatial frequency selectivity.

关键词： Receptive fields Hebbian learning Self-organization

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

铁铜色釉的呈色特性及窑变机理

硅酸盐学报 2018年第9期46卷 1273-1279页

作者：王毅余隋怀陕西科技大学设计与艺术学院西安710021 西北工业大学陕西省工业设计工程实验室西安710072

以铁、铜氧化物为着色剂,通过改变基础原料组成,在相同的烧成气氛下成功制备出红紫、蓝紫等色釉及复色花釉。以三角配料实验法、扫描电子显微镜、能谱分析、色度分析等分析了铁铜色釉的呈色物理化学原理以及釉的组成、烧成制度对釉面呈... 详细信息

以铁、铜氧化物为着色剂,通过改变基础原料组成,在相同的烧成气氛下成功制备出红紫、蓝紫等色釉及复色花釉。以三角配料实验法、扫描电子显微镜、能谱分析、色度分析等分析了铁铜色釉的呈色物理化学原理以及釉的组成、烧成制度对釉面呈色的影响。结果表明：在相同的烧成气氛下,偏红色釉相比偏蓝色釉SiO2含量较低而碱土金属及碱金属氧化物含量较高;铜红色和红紫色釉的差异仅仅是由于后者的成分中含有磷酸盐阴离子;当Ca3（PO4）2被引入釉中,微纳米尺寸短程序分相结构形成结构色,同时聚集在微相中的Fe2O3高温下分解为Fe2＋和气泡,形成蓝色或其他颜色花纹;由于铜和铁着色元素具有多种着色特性,工艺参数与基础成分的微小变化使得釉面颜色和色调发生相应变化形成窑变现象;釉中多种化学色耦合了微纳米结构呈色,使釉的着色现象更为复杂多变,也因此增加了窑变的几率与呈色的特异性。

关键词：铁铜色釉微观结构结构呈色窑变机理