检索结果-南通市图书馆

Dietary dimethylglycine sodium salt supplementation alleviates redox status imbalance and intestinal dysfunction in weaned piglets with intrauterine growth restriction

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2022年第3期10卷 188-197页

作者： Kaiwen Bai Luyi jiang qiming Li Jingfei Zhang Lili Zhang Tian Wang College of Animal Science and Technology Nanjing Agricultural UniversityNanjingChina College of Animal Science Zhejiang UniversityHangzhouChina

There are few studies on the mechanism of redox status imbalance and intestinal dysfunction in intrauterine growth restricted(IUGR)newborn piglets.Here,we investigated the mechanism of jejunum dysfunction in weaned piglets with IUGR and the mechanism through which dimethylglycine sodium salt(DMG-Na)supplementation improving the imbalance of their redox status.In this work,a total of 10 normal birth weight(NBW)newborn piglets and 20 IUGR newborn piglets were obtained.After weaning at 21 d,they were assigned to 3 groups(n=10/group):NBW weaned piglets fed standard basal diets(NBWC);one IUGR weaned piglets fed standard basal diets(IUGRC);another IUGR weaned piglets from the same litter fed standard basal diets plus 0.1%DMG-Na(IUGRD).The piglets in these 3 groups were sacrificed at 49 d of age,and the blood and jejunum samples were collected immediately.The growth performance values in the IUGRC group were lower(P<0.05)than those in the NBWC group.Jejunum histomorphological parameters,inflammatory cytokines,and digestive enzyme activity as well as serum immunoglobulin were lower(P<0.05)in the IUGRC group than those in the NBWC group.Compared with these in the NBWC group,the redox status of serum,jejunum,and mitochondria and the expression levels of jejunum redox status-related,cell adhesion-related,and mitochondrial function-related genes and proteins were suppressed in the IUGRC group(P<0.05).However,compared with those in the IUGRC group,the growth performance values,jejunum histomorphological parameters,inflammatory cytokines,digestive enzyme activity,serum immunoglobulin,redox status of serum,jejunum,and mitochondria,and the expression levels of jejunum redox status-related,cell adhesion-related,and mitochondrial function-related genes and proteins were improved(P<0.05)in the IUGRD group.In conclusion,dietary DMG-Na supplementation alleviates redox status imbalance and intestinal dysfunction in IUGR weaned piglets mainly by activating the sirtuin 1(SIRT1)/peroxisome proliferatoractivated receptorgcoactivator-1a(PG

关键词： Intrauterine growth restriction Weaned piglet Jejunum Redox status Mitochondrial function Dimethylglycine sodium salt

在线全文

学校读者我要写书评

暂无评论

甘肃礼县中川地区金矿流体的来源与成因

地质科学 2022年第2期57卷 510-523页

作者：姜启明甘肃工业职业技术学院甘肃天水741025

甘肃省礼县中川地区属于礼(县)岷(县)金矿带的东段,其成矿作用与中川花岗杂岩体有密切的关系。此次研究在已知金矿体上采集标本,碎样后挑选石英晶体,运用英国Micromass公司生产的MM5400质谱计,在1600℃条件下,让石英释放稀有气体,测量... 详细信息

甘肃省礼县中川地区属于礼(县)岷(县)金矿带的东段,其成矿作用与中川花岗杂岩体有密切的关系。此次研究在已知金矿体上采集标本,碎样后挑选石英晶体,运用英国Micromass公司生产的MM5400质谱计,在1600℃条件下,让石英释放稀有气体,测量其中的^(4)He、^(20)Ne、^(40)Ar等稀有气体,通过稀有气体的示踪作用,研究成矿流体的来源。测试结果表明:礼县中川地区金矿的成矿流体中的^(4)He和^(40)Ar来源于中川花岗杂岩体;Ar同位素比值符合地壳流体特征;在^(3)He/^(4)He‑^(4)He/^(20)Ne体系图上,7个样品中,有4个点位于100%地壳流体来源线上,3个点位于5%上地幔与30%上地幔流体之间,说明成矿热流成分主要是地壳流体,含有10%左右的上地幔热流,即礼县中川地区金矿成矿流体具有混合热液特征。

关键词：金矿床中川花岗杂岩体稀有气体成矿流体

Agronomic effectiveness of recovered phosphate fertilizer produced from incinerated sewage sludge ash

在线全文

学校读者我要写书评

暂无评论

Waste Disposal and Sustainable Energy 2022年第3期4卷 157-167页

作者： Le Fang Liping Li qiming Wang jiang-shan Li Chi Sun Poon Research and Development Center for Watershed Environmental Eco-Engineering Beijing Normal UniversityZhuhai519087China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing100875China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityKowloonHong KongChina State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science KowloonHong KongChina

Phosphorus(P)recovery from incinerated sewage sludge ash(ISSA)has been extensively investigated,but insufficient research has been conducted to evaluate the effect of different kinds of recovered phosphate fertilizers(RPFs)on plant growth with respect to the P and heavy metal contents of RPFs.In this study,three kinds of RPFs,precipitated calcium phosphate fertilizer(CaP),struvite phosphate fertilizer(SP),and P-loaded biochar(BP),produced from ISSA were characterized,and their agronomic effectiveness was verified by hydroponic and soil cultivation.In addition to the three kinds of RPFs,a control group(mono-phosphate fertilizer in hydroponic group/compound fertilizer in soil cultivation group)and a blank control group(BC,with zero P)were tested on choy sum and ryegrass at the same time.SP has the highest P purity(76.0%of struvite)while the BP has the most complex P species(P was co-exist with Fe,Al,and Mg).Plant growth results showed that the RPFs greatly facilitated plant growth and demonstrated superior/comparable effects to those of control group.In hydroponics testing,SP showed the best effect(shoot length of 17.0 cm,chlorophyll content of 2.05 mg/g)due to the Mg involved and the high P purity of SP,while BP performed the best(shoot length of 13.7 cm,chlorophyll content of 2.42 mg/g)in the soil testing system among all of the groups because of the additional nutritional elements and the high P availability of BP.Additionally,the accumulation of heavy metals in the plants under all conditions did not exceed the limits stipulated in the regulations.These results indicate that recovering P from ISSA is an attractive technology to produce P fertilizers,which can alleviate both the scarcity of phosphate resources and the burden of ISSA management.

关键词： Recovered phosphate fertilizer Incinerated sewage sludge ash Agronomic analysis Heavy metals Waste management

维普期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

互联网技术赋能下数字普惠金融发展策略研究

新金融 2021年第5期 55-60页

作者：江齐明澳门城市大学金融学院

在互联网技术赋能下,数字金融的创新可以有效缓解普惠金融发展约束,解决传统金融模式下普惠金融内生性困境,推动普惠金融"最后一公里"建设。我国数字普惠金融快速发展,不仅技术层面日益成熟,政策层面也有具体指导和支持。数字普惠金融... 详细信息

在互联网技术赋能下,数字金融的创新可以有效缓解普惠金融发展约束,解决传统金融模式下普惠金融内生性困境,推动普惠金融"最后一公里"建设。我国数字普惠金融快速发展,不仅技术层面日益成熟,政策层面也有具体指导和支持。数字普惠金融是未来金融业发展方向,存在诸多发展机遇。但数字普惠金融的发展路径是开放的,需要探索与检验。在此过程中,势必又会面临诸多风险挑战。对此,本文提出高质量数字普惠金融发展路径:对数字金融宏观监管,保持经济稳定发展;对消费者进行保护,保证个人利益免受侵犯。

关键词：数字经济普惠金融技术赋能高质量发展

在线全文

学校读者我要写书评

暂无评论

视界

China Report ASEAN 2023年第7期8卷 10-15页

作者： jiang qiming 无 JES AZNAR SYAIFUL REDZUAN KOSIT THIRAJARUNG 不详 IC PHOTO VCG OPN IMAGES

Postoperative intussusception in infants and children:a report of seven cases

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Journal of Biomedical Research 2012年第1期26卷 66-68页

作者： Weiwei jiang Weibing Tang qiming Geng Xiaoqun Xu Department of Neonatal Surgery Nanjing Children＇s Hospital Affiliated with Nanjing Medical University Nanjing Jiangsu 210029 China

Postoperative intussusception is an uncommon but serious condition in infants and children. Here, we report seven cases of postoperative intussusception in infants and children who were seen at our institution over the last 13 y. The patients showed increased nasogastfic drainage, vomiting, lack of stool, and/or growing abdominal dis- tension 2 to 9 d following abdominal surgery. Manual reduction was successful in five cases. In two cases, necro- sis was found and intestinal resection and anastomosis were carded out, No recurrence was observed at six months of follow-up. Postoperative intussusception should be suspected in pediatric surgical patients who showed signs of intestinal obstruction in the early postoperative period.

关键词： postoperative intussusception intestinal obstruction infants children

Improving in vitro and in vivo corrosion resistance and biocompatibility of Mg-1Zn-1Sn alloys by microalloying with Sr

在线全文

学校读者我要写书评

暂无评论

Bioactive Materials 2021年第12期6卷 4654-4669页

作者： Yafeng Wen Qingshan Liu Jingfeng Wang qiming Yang Weikang Zhao Bo Qiao Yuling Li Dianming jiang Department of Orthopaedics The First Affiliated Hospital of Chongqing Medical UniversityChongqing400042People’s Republic of China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing400044People’s Republic of China Department of Orthopaedics Affiliated Hospital of North Sichuan Medical CollegeNo.63 Wenhua RoadNanchong CitySichuan Province637000People’s Republic of China The Third Affiliated Hospital of Chongqing Medical University No.1 Shuanghu RoadYubei DistrictChongqing401120People’s Republic of China

Magnesium(Mg)and its alloys have attracted attention as potential biodegradable materials in orthopedics due to their mechanical and physical properties,which are compatible with those of human bone.However,the effect of the mismatch between the rapid material degradation and fracture healing caused by the adverse effect of hydrogen(H2),which is generated during degradation,on surrounding bone tissue has severely restricted the application of Mg and its alloys.Thus,the development of new Mg alloys to achieve ideal degradation rates,H2 evolution and mechanical properties is necessary.Herein,a novel Mg-1Zn-1Sn-xSr(x=0,0.2,0.4,and 0.6 wt%)quaternary alloy was developed,and the microstructure,mechanical properties,corrosion behavior and biocompatibility in vitro/vivo were investigated.The results demonstrated that a minor amount of strontium(Sr)(0.2 wt%)enhanced the corrosion resistance and mechanical properties of Mg-1Zn-1Sn alloy through grain refinement and second phase strengthening.Simultaneously,due to the high hydrogen overpotential of tin(Sn),the H2 release of the alloys was significantly reduced.Furthermore,Sr-containing Mg-1Zn-1Sn-based alloys significantly enhanced the viability,adhesion and spreading of MC3T3-E1 cells in vitro due to their unique biological activity and the ability to spontaneously form a network structure layer with micro/nanotopography.A low corrosion rate and improved biocompatibility were also maintained in a rat subcutaneous implantation model.However,excessive Sr(>0.2 wt%)led to a microgalvanic reaction and accelerated corrosion and H2 evolution.Considering the corrosion resistance,H2 evolution,mechanical properties and biocompatibility in vitro and in vivo,Mg-1Zn-1Sn-0.2Sr alloy has tremendous potential for clinical applications.

关键词： Magnesium alloy Strontium Biodegradable Biocompatibility Corrosion resistance

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

FAST促动器故障预测与健康管理系统

清华大学学报（自然科学版） 2022年第11期62卷 1796-1802页

作者：雷政姜鹏王启明中国科学院国家天文台北京100101 中国科学院国家天文台 FAST重点实验室北京100101

针对促动器故障修复周期长影响FAST望远镜观测的问题,提出促动器故障预测与健康管理(prognostics health management,PHM)系统解决方案。PHM系统首先以实时状态数据为输入对促动器健康状态进行评估,然后根据评估结果对其进行故障诊断或... 详细信息

针对促动器故障修复周期长影响FAST望远镜观测的问题,提出促动器故障预测与健康管理(prognostics health management,PHM)系统解决方案。PHM系统首先以实时状态数据为输入对促动器健康状态进行评估,然后根据评估结果对其进行故障诊断或剩余寿命预测,最后结合实时维护条件生成维护决策。通过故障诊断提高维护效率,并利用剩余寿命预测模型对连续型零部件的剩余寿命进行预测,将促动器维护模式从被动式事后维护转变为主动式视情维护,从而降低促动器的平均故障修复时间,提高促动器可靠性。促动器PHM系统为FAST促动器维护提供了一种高效的维护方案,也为其他类似的系统维护研究提供参考。

关键词： FAST促动器故障预测与健康管理系统剩余寿命预测视情维护

实践场域中智力资源引领下县域教师专业能力协同发展研究

在线全文

学校读者我要写书评

暂无评论

中国电化教育 2022年第6期 120-126页

作者：蒋立兵毛齐明华中师范大学终身教育研究所湖北武汉430079 华中师范大学教育学院湖北武汉430079

高素质的教师队伍是基础教育高质量发展的第一资源。然而,中西部县域教师专业发展陷入了同质化、碎片化、浅表化和低效化的窘境,亟需高水平智力资源的专业引领:顶层设计绘制县域教师协同发展的蓝图,智力成果把舵县域教育变革的航向,学... 详细信息

高素质的教师队伍是基础教育高质量发展的第一资源。然而,中西部县域教师专业发展陷入了同质化、碎片化、浅表化和低效化的窘境,亟需高水平智力资源的专业引领:顶层设计绘制县域教师协同发展的蓝图,智力成果把舵县域教育变革的航向,学科名师破解县域教师发展的困惑。该文基于县域教师专业发展的内生需求,从层级结构、过程阶段和内在机制等层面构建了“引领层—示范层—基地层—终端层”四维一体的智力资源引领下县域教师协同发展的新模式。该模式在M县U-G-S校地合作项目中得到了检验:智力资源引领下的县域教师协同发展激发了教师专业成长的内生动力,提升了学科骨干教师的专业能力,生成了基地校深度研修的操作指南模式,打造了县域教师协同发展的支持体系,彰显了县域教师发展区域推进的协同效应,受到本地教育部门和参与教师的一致肯定。

关键词：实践场域智力资源县域教师协同发展