检索结果-南通市图书馆

塑料 2010年第4期39卷 108-110,84页

作者：刘旭辉黄汉雄长江大学机械工程学院湖北荆州434023 华南理工大学机械与汽车工程学院广东广州510640

介绍自主研发的用于研究水辅助注塑的注水系统,从熔体流动的踪迹、水/熔体界面的运动演变、制品内径的变化和共混物分散相形态的演变等4个方面,对研究水辅助熔体充模流动机理的实验设备和实验方法进行阐述,并展示了实验结果。

关键词：水辅助注塑机理熔体流动实验设备实验方法

维普期刊数据库

The proximity between hydroxyl and single atom determines the catalytic reactivity of Rh1/CeO_(2) single-atom catalysts

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第1期17卷 397-406页

作者： Danfeng Wu Shuyun Zhou Congcong Du Juan Li Jianyu huang Hong-xia Shen Abhaya K.Datye Shan Jiang Jeffrey T.Miller Sen Lin Haifeng xiong State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China College of Biology and Chemical Engineering Jiaxing UniversityJiaxing 314000China Department of Chemical&Biological Engineering University of New MexicoAlbuquerqueNM 8731-0001USA Davidson School of Chemical Engineering Purdue UniversityWest LafayetteIN 47907-2100USA Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China Fujian Key Laboratory of Rare-earth Functional Materials Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional MaterialsLongyan 366300China

The local structure of the metal single-atom site is closely related to the catalytic activity of metal single-atom catalysts(SACs).However,constructing SACs with homogeneous metal active sites is a challenge due to the surface heterogeneity of the conventional ***,we prepared two Rh1/CeO_(2)SACs(0.5Rh1/r-CeO_(2)and 0.5Rh1/c-CeO_(2),respectively)using two shaped CeO_(2)(rod and cube)exposing different facets,i.e.,CeO_(2)(111)and CeO_(2)(100).In CO oxidation reaction,the T100 of 0.5Rh1/r-CeO_(2)SACs is 120°C,while the T100 of 0.5Rh1/c-CeO_(2)SACs is as high as 200°*** in-situ CO diffuse reflectance infrared Fourier transform spectroscopy(CO-DRIFTS),we found that the proximity between OH group and Rh single atom on the plane surface plays an important role in the catalytic activity of Rh1/CeO_(2)SAC system in CO *** Rh single atom trapped at the CeO_(2)(111)crystal surface forms the Rh1(OH)adjacent species,which is not found on the CeO_(2)(100)crystal surface at room ***,during CO oxidation,the OH group far from Rh single atom on the 0.5Rh1/c-CeO_(2)disappears and forms Rh1(OH)adjacent species when the temperature is above 150°*** formation of Rh1(OH)adjacentCO intermediate in the reaction is pivotal for the excellent catalytic activity,which explains the difference in the catalytic activity of Rh single atoms on two different CeO_(2)*** formed Rh1(OH)adjacent-O-Ce structure exhibits good stability in the reducing atmosphere,maintaining the Rh atomic dispersion after CO oxidation even when pre-reduced at high temperature of 500°*** functional theory(DFT)calculations validate the unique activity and reaction path of the intermediate Rh1(OH)adjacentCO species *** work demonstrates that the proximity between metal single atom and hydroxyl can determine the formation of active intermediates to affect the catalytic performances in catalysis.

关键词： crystal plane Rh1/CeO_(2)single-atom catalyst proximity of Rh and hydroxyl coordination structure CO oxidation

基于白光中子源的^(197)Au中子辐射俘获截面测量及共振参数分析

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

物理学报 2024年第7期73卷 104-113页

作者：罗淏天张奇玮栾广源王晓宇邹翀任杰阮锡超贺国珠鲍杰孙琪黄翰雄王朝辉吴鸿毅顾旻皓余滔解立坤陈永浩安琪白怀勇鲍煜曹平陈昊磊陈琪萍陈裕凯陈朕崔增琪樊瑞睿封常青高可庆韩长材韩子杰何泳成洪杨黄蔚玲黄锡汝季筱璐吉旭阳蒋伟江浩雨姜智杰敬罕涛康玲康明涛李波李超李嘉雯李论李强李晓李样刘荣刘树彬刘星言穆奇丽宁常军齐斌斌任智洲宋英鹏宋朝晖孙虹孙康孙晓阳孙志嘉谭志新唐洪庆唐靖宇唐新懿田斌斌王丽娇王鹏程王琦王涛峰文杰温中伟吴青彪吴晓光吴煊羊奕伟易晗于莉于永积张国辉张林浩张显鹏张玉亮张志永赵豫斌周路平周祖英朱丹阳朱科军朱鹏朱兴华中国原子能科学研究院核数据重点实验室北京102413 中国科学院高能物理研究所北京100049 散裂中子源科学中心东莞523803 核探测与核电子学国家重点实验室北京100049 中国科学技术大学近代物理系核探测与核电子学国家重点实验室合肥230026 北京大学物理学院核物理与核技术国家重点实验室北京100871 中国工程物理研究院核物理与化学研究所绵阳621900 西北核技术研究院西安710024 中国科学院大学北京100049 中国科学技术大学工程与应用物理系合肥230026 北京航空航天大学物理学院北京100083 华能山东石岛湾核电有限公司荣成264312

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2)探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室... 详细信息

中子辐射俘获反应在反应堆运行、核装置设计及核天体物理研究中起重要的作用.4πBaF_(2)探测装置有着高时间分辨能力、低中子灵敏度、高探测效率等优点,适合开展中子辐射俘获反应截面数据的测量.中国原子能科学研究院核数据重点实验室建立了伽马全吸收装置(Gamma total absorption facility,GTAF),该装置用28块六棱BaF_(2)晶体和12块五棱BaF_(2)晶体构成了外径25 cm,内径10 cm的球壳,覆盖了95.2%的立体角.利用GTAF在中国散裂中子源Back-n束线上,测量了197Au(n,γ)的反应截面数据.测量数据通过能量筛选、PSD方法、晶体多重性筛选进行了初步本底扣除,随后结合对^(nat)C及空样品的测量数据对本底进行了分析及扣除,获得了197Au俘获反应的产额,利用SAMMY程序拟合得到了^(197)Au在1—100 e V的共振能量、中子共振宽度和伽马共振宽度参数.实验测量结果与ENDF/B-VIII.0数据库符合良好,其共振参数存在一定差异,分析原因可能与GTAF能量分辨率、Back-n的中子能谱测量精度、以及实验本底扣除方法相关,这也是下一步工作的重点.

关键词：中子辐射俘获截面共振参数白光中子源伽马全吸收装置

维普期刊数据库博看期刊

Extremely stable Li-metal battery enabled by piezoelectric polyacrylonitrile quasi-solid-state electrolytes

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2024年第1期10卷 134-144页

作者： Hongzhi Peng Zhong Xu Yunjie Zhou Junfeng huang Tao Yang Jieling Zhang Yong Ao Yanting Xie hanyu He xiong Zhang Weiqing Yang Haitao Zhang Key Laboratory of Advanced Technologies of Materials Ministry of EducationInstitute of Smart City and Intelligent TransportationSouthwest Jiaotong UniversityChengdu610031China Chengdu Metro Operation No.3 Company Chengdu610031China Institute of Electrical Engineering Chinese Academy of SciencesBeijing100190China

Polymer solid-state electrolytes(PSSEs)are promising for solving the safety problem of Lithium(Li)metal batteries(LMBs).However,PSSEs with low modulus in nature are prone to be penetrated by lithium dendrites,resulting in short circuit of ***,we design and prepare piezoelectric BaTiO_(3)doped polyacrylonitrile(PAN@BTO)quasi-solid-state electrolytes(PQSSEs)by electrostatic spinning method to suppress dendritic *** piezoelectric polymer electrolytes are squeezed by nucleation and growth processes of Li dendrites,which can generate a piezoelectric electric field to regulate the deposition of Li^(+)ions and eliminate lithium ***,piezoelectric PAN@BTO PQSSEs enables highly stable Li plating/stripping cycling for over 2000 h at 0.15 mA/cm^(2)at room temperature(RT,25℃).Also,LiFePO_(4)|PAN@BTO|Li full cells demonstrate excellent cycle performance(136.9 mA·h/g and 78%retention after 600 cycles at 0.5 C)at ***,LiFePO_(4)|PAN@BTO|Li battery show extremely high safety and can still work normally under high-speed impact(2 Hz,∼30 kPa).We construct an in-situ cell monitoring system and disclose that the mechanism of suppressed lithium dendrite is originated from the generation of opposite piezoelectric potential and the feedback speed of intermittent piezoelectric potential signals is extremely fast.

关键词： Polymer solid-state electrolytes Polyacrylonitrile Piezoelectric effect Lithium metal battery Long-term stability Lithium dendrites

Characteristics and Risk Factors for Pediatric Sepsis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Current Medical Science 2024年第3期44卷 648-656页

作者： Yong-bing ZHU Tong-lin LIU Qi DAI Shu-fan LIU Peng xiong Hao huang Yi YUAN Tian-nan ZhanG Yu CHEN Department of Pediatric Intensive Care Unit Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

Objective Sepsis is considered a major cause of health loss in children and had high mortality and ***,there is no reliable model for predicting the prognosis of pediatric patients with *** study aimed to analyze the clinical characteristics of sepsis in children and assess the risk factors associated with poor prognosis in pediatric sepsis patients to identify timely interventions and improve their *** This study analyzed the clinical indicators and laboratory results of septic patients hospitalized in the Pediatric Intensive Care Unit of Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,China,from January 1,2019,to December 31,*** factors for sepsis were identified by logistic regression *** A total of 355 children with sepsis were enrolled,with 333 children(93.8%)in the good prognosis group,and 22 children(6.2%)in the poor prognosis *** them,there were 255 patients(71.8%)in the sepsis group,and 100 patients(28.2%)in the severe sepsis *** length of hospital stay in the poor prognosis group was longer than that in the good prognosis group(Phan those in the good prognosis group(P>0.05),and the platelet(PLT),albumin(ALB),and hemoglobin(Hb)levels were lower in the poor prognosis group(Phan those in the sepsis group(P<0.05).Multiple logistic regression analysis suggested that lower Hb levels,ALB levels,peak PLT counts,and higher IL-1βlevels were independent risk factors for poor prognosis in children with *** Lower Hb,ALB,and PLT counts and elevated IL-1βare independent risk factors for poor prognosis in children with sepsis.

关键词： pediatric sepsis inflammation severity prognosis risk factors

Mitochondria-targeted atovaquone promotes anti-lung cancer immunity by reshaping tumor microenvironment and enhancing energy metabolism of anti-tumor immune cells

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cancer Communications 2024年第3期44卷 448-452页

作者： Donghai xiong Zheng Yin Mofei huang Yian Wang Micael Hardy Balaraman Kalyanaraman Stephen T Wong Ming You Center for Cancer Prevention Houston Methodist Neal Cancer CenterHouston Methodist HospitalWeill Cornell MedicineHoustonTexasUSA Department of Systems Medicine and Bioengineering Houston Methodist Cancer CenterHouston Methodist HospitalWeill Cornell MedicineHoustonTexasUSA Aix Marseille Univ Centre Nationaldela Recherche Scientifique(CNRS)Institut de Chimie Radicalaire(ICR)UnitéMixte de Recherche(UMR)7273MarseilleFrance Department of Biophysics Medical College of WisconsinMilwaukeeWisconsinUSA

Dear Editor,Atovaquone(ATO),a mitochondrial inhibitor,has anti-cancer effects[1].Based on ATO,we developed mitochondria-targeted atovaquone(Mito-ATO)that had even stronger anti-tumor efficacy than ATO[2].We syn-thesized Mito-ATO by attaching the bulky triphenylphos-phonium(TPP)group to ATO via a ten-carbon alkyl chain(Supplementary file of methods;Supplementary Figure S1).

关键词： metabolism immunity targeted

吹塑的理论研究及高性能低能耗设备与关键技术研发

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

华南理工大学学报（自然科学版） 2012年第10期40卷 203-210页

作者：黄汉雄黄耿群李炯城王泉杰李为平肖成龙黄有发华南理工大学机械与汽车工程学院广东广州510640

概述了本课题组针对吹塑开展的理论研究工作,包括吹塑三阶段(型坯成型、型坯吹胀和制品冷却)的建模和仿真以及吹塑制品壁厚的控制策略;着重分析了在理论基础上研制成功的具有自主知识产权的4种吹塑设备与关键技术,分别是风动力牵引三维... 详细信息

概述了本课题组针对吹塑开展的理论研究工作,包括吹塑三阶段(型坯成型、型坯吹胀和制品冷却)的建模和仿真以及吹塑制品壁厚的控制策略;着重分析了在理论基础上研制成功的具有自主知识产权的4种吹塑设备与关键技术,分别是风动力牵引三维吹塑设备与技术、吹塑制品壁厚智能化控制系统与技术、全电动吹塑设备关键系统与技术以及吹塑模具快速热循环系统与优化.对这些吹塑设备与关键技术进行集成,实现了复杂制件吹塑的节能和节材两大目标.

关键词：聚合物加工成型吹塑建模仿真加工成型设备关键技术

维普期刊数据库

Neuroprotective Effects of MIP-15 Peptide from Morchella importuna Against Ischemic-Hypoxic Brain Damage in Rats

在线全文

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年

作者： Chuan xiong Ping Li Qiang Luo Chia Wei Phan Xin Jin Wenli huang Biotechnology and Nuclear Technology Research Institute， Sichuan Academy of Agricultural Sciences The Second Affiliated Hospital， Chongqing Medical University Department of Anatomy， Faculty of Medicine， Universiti Malaya

Hypoxic-ischemic encephalopathy (HIE) is a prominent cause of neuronal damage and neonatal death， and effective treatment strategies remain limited. In a prior investigation， we purified a novel peptide (designated MIP-15) from the rare mushroom Morchella importuna， demonstrating its notable free radical scavenging activity. Nevertheless， the potential neuroprotective role of MIP-15 in neonatal hypoxic-ischemic brain damage (HIBD) and its underlying mechanism remain elusive. The purpose of this study was to evaluate whether MIP-15 exerts neuroprotective effects by inhibiting the mitochondrial apoptotic pathway after HIBD. A HIBD model in 7-day-old (P7) rats was established by the Rice–Vannucci method to evaluate the effect of MIP-15 on the neurological damage severity and space cognitive ability of rats. Subsequently， an oxygen glucose deprivation/reoxygenation (OGD/R) model was established in rat primary hippocampal neurons to explore the mechanism of MIP-15 action. Both in vivo and in vitro data showed that MIP-15 markedly restored endogenous antioxidative activity， decreased brain water content， and ameliorated pathological abnormalities following HIBD. The spatial cognitive ability and motor function of HIBD rats were also repaired. Moreover， in primary hippocampal neurons after OGD/R， MIP-15 increased cell viability by inhibiting the mitochondrial-dependent apoptosis pathway， as manifested by stabilization of the mitochondrial membrane potential， prevention of the release of cytochrome c， upregulation of Bcl-2/Bax， and reduction in the triggering of caspase proteins. These data indicate that MIP-15 may have the potential to act as a neuroprotective agent.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

聚合物共混物加工中的相反转现象

塑料 2005年第4期34卷 11-13,5页

作者：毛善强黄汉雄黄有发华南理工大学工业装备与控制工程学院塑料橡胶装备及智能化研究中心广州510640

根据国外近期对聚合物共混物共混加工过程中相反转的研究,阐述了相反转的概念及其机理的研究进展,并且介绍了目前建立的各种预测相反转点体积分数的公式以及它们之间的区别。此外,还指出了当前研究的不足和今后研究的方向。

关键词：聚合物共混相反转

维普期刊数据库

Maternal or post-weaning dietary fructo-oligosaccharide supplementation reduces stillbirth rate of sows and diarrhea of weaned piglets

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2024年第02期17卷 155-164页

作者： Kaidi Ma Bin Su Fuyong Li Jinfeng Li Jiawei Nie Wenyu xiong Jinxi Luo Shuangbo huang Tong Zhou Xide Liang Facai Li Jinping Deng Chengquan Tan Guangdong Provincial Key Laboratory of Animal Nutrition Control National Engineering Research Center for Breeding Swine Industry Institute of Subtropical Animal Nutrition and Feed College of Animal Science South China Agricultural University Guangzhou Pucheng Biological Technology Co. Baolingbao Biology Co. Ltd

Fructo-oligosaccharides(FOS) are well-known prebiotics that have the potential to improve sow reproductive performance and increase piglet growth. However, previous studies were observed in sole FOS-supplemented diets of sows or weaned piglets and did not consider the sow-to-piglet transfer effect on the performance and diarrhea rate of weaned piglets. This study explores the effects of dietary FOS supplementation on the reproductive performance of sows, and the effects of FOS supplementation at different stages on the growth performance and diarrhea rate of weaned piglets. A split-plot experimental design was used with sow diet effect in the whole plot and differing piglet diet effect in the subplot. Fifty-two multiparous sows(223.24 ± 14.77 kg) were randomly divided into 2 groups(0 or 0.2%FOS). The experiment lasted from day 85 of gestation to day 21 of lactation. Reproductive performance,glucose tolerance, placental angiogenesis, and intestinal flora of sows were assessed. At weaning, 192weaned piglets were grouped in 2 × 2 factorial designs, with the main effects of FOS supplemental level of sow diet(0 and 0.2%), and FOS supplemental level of weaned piglet diet(0 and 0.2%), respectively. The growth performance and diarrhea rate of the weaned piglets were analyzed during a 28-d *** dietary supplementation of FOS was shown to reduce the stillbirth and invalid piglet rates(P < 0.05), improve the insulin sensitivity(P < 0.05) and fecal scores(P < 0.05) of sows, increase the abundance of Akkermansia muciniphila(P = 0.016), decrease the abundance of Escherichia coli(P = 0.035),and increase the isovalerate content in feces(P = 0.086). Meanwhile, the placental angiogenesis marker CD31 expression was increased in sows fed FOS diet(P < 0.05). Moreover, maternal and post-weaning dietary FOS supplementation reduced the diarrhea rate of weaned piglets(P < 0.05) and increased the content of short-chain fatty acids in feces(P < 0.05). Furthermore, only post-wea

关键词： Stillbirth Diarrhea Fructo-oligosaccharide Sow Weaned piglet