检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

甜菜碱和硫酸锌影响海水胁迫豌豆幼苗的生长

作物杂志 2009年第5期 31-34页

作者：吴文杰蔡小霞泉州师范学院化学与生命科学学院福建泉州362000

种植耐海水作物是合理利用海水及海涂资源的有效措施之一。试验以豌豆(Pisum sativum)为材料,研究甜菜碱(Glycinebetaine,GB)及硫酸锌对35%海水胁迫下豌豆种子萌发及幼苗的形态建成及其生理生化特性的影响。结果表明,35%海水胁迫下,200m... 详细信息

种植耐海水作物是合理利用海水及海涂资源的有效措施之一。试验以豌豆(Pisum sativum)为材料,研究甜菜碱(Glycinebetaine,GB)及硫酸锌对35%海水胁迫下豌豆种子萌发及幼苗的形态建成及其生理生化特性的影响。结果表明,35%海水胁迫下,200mg/L GB与1×10-4mol/LZnSO4协同作用,能够显著提高幼苗根长、株高及鲜重,提高光合色素含量,提高可溶性蛋白含量,降低丙二醛(MDA)含量,增强过氧化物酶(POD)活性;缓解海水对豌豆幼苗的伤害,提高豌豆幼苗的耐海水能力。

关键词：海水甜菜碱硫酸锌豌豆幼苗生理效应

An ultra-porous g-C_(3)N_(4) micro-tube coupled with MXene(Ti_(3)C_(2)TX)nanosheets for efficient degradation of organics under natural sunlight

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第3期137卷 258-270页

作者： Zongyang Ya Qiyou Wang Jingjin cai Peng Wang Xinyu Jiang Zhiyin cai Shanglin Xiang Tingwei Wang Dongyu cai College of Materials Science&Engineering Nanjing Tech University30 South PuZhu RoadNanjing 211816China Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM) Jiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech University30 South PuZhu RoadNanjing 211816China

It remains as a challenge for realizing efficient photo-responsive catalysts towards largescale degradation of organic pollutants under natural *** work reports a new pore engineering strategy for creating ultra-porous g-C_(3)N_(4) micro-tubes with an unprecedentedly high specific surface area of 152.96 m^(2)/*** is mainly associated with releasing internal vapor pressure in the autoclave where the hydrothermal treatment of the urea/melamine mixture is *** by microscopic observation,porosity measurement and spectroscopic characterization,it is found that releasing the pressure at halfway of hydrothermal process is vital for forming exfoliated rod-like precursors and the de-aggregation of these rods presents substantial benefits on the production of mesopores on g-C_(3)N_(4) microtubes during the calcination of *** offers a large number of reactive sites required by photocatalytic *** these micro-tubes with Ti_(3)C_(2)T_(X) nanosheets via electrostatic interaction yields a 1D/2D heterojunction with a close interfacial *** addition of metallically conductive Ti_(3)C_(2)T_(X) nanosheets accelerates the separation between electrons and holes,and also enhances the light *** these merits of structural design lead to forming a group of highly efficient catalysts demonstrating an excellent photocatalytic degradation rate of k=0.0560 min^(-1)for RhB dyes under 100 mW/cm~2 visible light radiation that micks sunlight *** laboratory valuation is further supported by an outdoor test that shows a fast degradation rate of 0.0744 min^(-1)under natural sunlight.

关键词： Carbon nitride MXene Heterojunction Photocatalysis

在线全文

学校读者我要写书评

暂无评论

疼痛手册在癌症患者家庭护理中的应用

科教导刊 2019年第18期 158-160页

作者：蔡小霞海南医学院国际护理学院

目的探讨疼痛手册在癌症患者家庭护理中的应用效果。方法:采用随机抽样的方法抽取2016年3月-2017年5月在海南医学院附属第一医院肿瘤内科住院的癌症患者60名作为研究对象,随机分为干预组和对照组各30例。对照组由管床护士实施癌痛常规... 详细信息

目的探讨疼痛手册在癌症患者家庭护理中的应用效果。方法:采用随机抽样的方法抽取2016年3月-2017年5月在海南医学院附属第一医院肿瘤内科住院的癌症患者60名作为研究对象,随机分为干预组和对照组各30例。对照组由管床护士实施癌痛常规护理及出院指导,干预组由管床护士对患者及家属进行有关疼痛手册内容的培训,出院后由患者和家属共同对疼痛情况、治疗护理情况及效果进行观察、评价,并记录在手册上。研究人员每周定时电话随访1次,了解疼痛手册记录相关内容,帮助患者及家属解决存在的问题。比较干预前、干预后3个月两组疼痛强度(采用疼痛评价量表)、止痛治疗依从性(止痛治疗依从性量表)。结果:干预3个月后,干预组疼痛强度得分为5.03±1.080,低于干预前6.67±0.942,差异有统计学意义(t=6.383,P<0.001);低于对照组6.60±0.814差异有统计学意义(t=7.312,P<0.001);干预组服药依从性得分12.07±1.285,高于干预前7.63±0.928,差异有统计学意义(t=16.173,P<0.001);高于对照组7.77±0.898,差异有统计学意(t=14.916,P<0.001)。结论:运用疼痛手册能有效提高癌症患者止痛治疗依从性,减轻疼痛,提高患者生活质量。

关键词：疼痛手册癌症患者家庭护理

在线全文

学校读者我要写书评

暂无评论

民办高师院校大一新生心理健康状况调查研究

科教文汇 2017年第2期 141-143页

作者：蔡小霞信阳学院社会科学学院河南信阳464000

目的:了解民办高师院校大一新生的心理健康状况,进一步完善大学生心理健康档案,为提高其心理健康水平提供理论指导。方法:采用整群抽样法对某民办高师院校3975名2015级大一新生进行调查。结果:本调查共筛检出228人呈现中、重度阳性症状... 详细信息

目的:了解民办高师院校大一新生的心理健康状况,进一步完善大学生心理健康档案,为提高其心理健康水平提供理论指导。方法:采用整群抽样法对某民办高师院校3975名2015级大一新生进行调查。结果:本调查共筛检出228人呈现中、重度阳性症状,阳性检出率为6.01%,大一新生面临的主要心理困扰依次是强迫症状、人际敏感和抑郁;敌对和偏执存在显著的性别差异;强迫症状、敌对、偏执、人际敏感、精神病性等在专业维度上差异显著。结论:民办高师院校大一新生心理健康状况总体良好,但高危人群的检出率依然较高,有待进一步关注。

关键词：大一新生心理健康调查研究

Review of dynamics and active control of large-scale space membrane antenna

在线全文

学校读者我要写书评

暂无评论

Astrodynamics 2024年第1期8卷 1-26页

作者： Xiang Liu Guoping cai Department of Engineering Mechanics MOE Key Laboratory of HydrodynamicsChongqing Research InstituteShanghai Jiao Tong UniversityShanghai200240China

Large-scale space membrane antennas have significant potential in satellite communication,space-based early warning,and Earth *** of their large size and high flexibility,the dynamic analysis and control of membrane antenna are *** maintain the working performance of the antenna,the pointing and surface accuracies must be strictly ***,the accurate dynamic modeling and effective active control of large-scale space membrane antennas have great theoretical significance and practical value,and have attracted considerable interest in recent *** paper reviews the dynamics and active control of large-scale space membrane ***,the development and status of large-scale space membrane antennas are ***,the key problems in the dynamics and active control of large membrane antennas,including the dynamics of wrinkled membranes,large-amplitude nonlinear vibration,nonlinear model reduction,rigid-flexible-thermal coupling dynamic modeling,on-orbit modal parameter identification,active vibration control,and wave-based vibration control,are discussed in ***,the research outlook and future trends are presented.

关键词： large-scale space membrane antenna dynamicmodeling active control

Microbial carbon pump shapes chemical signatures of refractory dissolved organic carbon in ocean water column

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Earth Sciences 2024年第7期67卷 2408-2410页

作者： Ruanhong cai Nianzhi JIAO Fujian Key Laboratory of Marine Carbon Sequestration Xiamen UniversityXiamen 361102China Department of Ocean Science The Hong Kong Universityof Science and TechnologyHong Kong SAR 999077China Carbon Neutral Innovation Research Center Xiamen UniversityXiamen 361102China

The global ocean sequesters a great amount of dissolved organic carbon(DOC),which is mainly originated from indigenous microbial activities(such as photosynthesis and chemoautotrophy)in the water column,as well as various exogenous sources such as riverine input,sediment mobilization,aerosol dissolution,hydrothermal vent effusion,and others(cai and Jiao,2023).

关键词： ocean originated aerosol

SOLVING SYSTEMS OF PHASELESS EQUATIONS VIA RIEMANNIAN OPTIMIZATION WITH OPTIMAL SAMPLING COMPLEXITY

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2024年第3期42卷 755-783页

作者： Jianfeng cai Ke Wei Department of Mathematics Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina School of Data Science Fudan UniversityShanghaiChina

A Riemannian gradient descent algorithm and a truncated variant are presented to solve systems of phaseless equations|Ax|^(2)=*** algorithms are developed by exploiting the inherent low rank structure of the problem based on the embedded manifold of rank-1 positive semidefinite *** recovery guarantee has been established for the truncated variant,showing that the algorithm is able to achieve successful recovery when the number of equations is proportional to the number of *** key ingredients in the analysis are the restricted well conditioned property and the restricted weak correlation property of the associated truncated linear *** evaluations show that our algorithms are competitive with other state-of-the-art first order nonconvex approaches with provable guarantees.

关键词： Phaseless equations Riemannian gradient descent Manifold of rank-1 and positive semidefinite matrices Optimal sampling complexity

Platelet-based bioactive systems guided precision targeting and immune regulation for cancer therapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第9期17卷 8269-8284页

作者： Xinyi cai Long Qiu Zhenying Diao Lintao cai Ting Yin Hong Pan Guangdong Key Laboratory of Nanomedicine CAS-HK Joint Lab of BiomaterialsCAS Key Laboratory of Biomedical Imaging Science and SystemInstitute of Biomedicine and BiotechnologyShenzhen Institute of Advanced Technology(SIAT)Chinese Academy of SciencesShenzhen 518055China School of pharmacy Guangdong Medical UniversityDongguan 523808China Sino-Euro Center of Biomedicine and Health Shenzhen 518024China

The antitumor effects of conventional drug carriers are often attenuated and limited in application by biological barriers associated with tumor heterogeneity and resistance brought about by low tumor *** the rapid development of nanotechnology,naturally derived bioactive materials,and live cell carriers,a promising strategy emerges for targeting the tumor microenvironment(TME)for precision cancer *** unique injury-targeting properties of platelets can significantly extend functional activity,which cannot be achieved with conventional *** this review,three strategies based on platelet-engineered materials are systematically described,namely nanoparticles for platelet membrane camouflage,engineered activated platelets,and targeted-platelets ***-based nanomaterials can effectively coordinate local and distant tumor-host crosstalk with controlled active tumor site recognition and killing effects due to the presence of specific membrane proteins on the surface and the self-secretion of a large number of *** advances in platelets for effectively overcoming biological barriers and reducing immune resistance in cancer immunotherapy applications will be discussed in future clinical *** review provides an overview of recent research advances in platelet-based bioactive material-directed immunotherapy and chemotherapy to inform future antitumor combination therapies.

关键词： platelets bionic targeting immune modulation precision therapy deep penetration

Novel method for measuring surface residual stress using flat-ended cylindrical indentation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2024年第8期37卷 486-495页

作者： Guangzhao HAN Lixun cai Xiaokun LIU Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Aerospace EngineeringSouthwest Jiaotong UniversityChengdu 610031China Zhengzhou Machinery Research Institute Transmission Technology Co. LtdZhengzhou 518115China

Instrumented indentation is a promising technique for estimating surface residual stresses and mechanical properties in engineering *** relative difference between the indentation loads for unstressed and stressed specimens was selected as the key parameter for measuring surface residual stresses in flat-ended cylindrical *** on the equivalent material method and finite element simulations,a dimensionless mapping model with six constants was established between the relative load difference,constitutive model parameters,and normalized residual stress.A novel method for measuring the surface residual stress and constitutive model parameters of metallic material through flat-ended cylindrical indentations was proposed using this model and a mechanical properties determination *** simulations were conducted using numerous elastoplastic materials with different residual stresses to verify the proposed model;good agreements were observed between the predicted residual stresses and those previously applied in finite element ***-ended cylindrical indentation tests were performed on four metallic materials using cruciform specimens subjected to various equibiaxial *** results exhibited good conformance between the stress–strain curves obtained using the proposed method and those from traditional tensile tests,and the absolute differences between the predicted residual stresses and applied stresses were within 40 MPa in most cases.

关键词： Instrumented indentation Residual stress Finite element simulation Equivalent material method Mechanical property