Diagnosis of CO2 dynamics and fluxes in global coastal oceans

Global coastal oceans as a whole represent an important carbon sink but, due to high spatial–temporal variability, a mechanistic conceptualization of the coastal carbon cycle is still under development, hindering the modelling and inclusion of coastal carbon in Earth System Models. Although temperature is considered an important control of sea surface pCO₂, we show that the latitudinal distribution of global coastal surface pCO₂ does not match that of temperature, and its inter-seasonal changes are substantially regulated by non-thermal factors such as water mass mixing and net primary production. These processes operate in both ocean-dominated and river-dominated margins, with carbon and nutrients sourced from the open ocean and land, respectively. These can be conceptualized by a semi-analytical framework that assesses the consumption of dissolved inorganic carbon relative to nutrients, to determine how a coastal system is a CO₂ source or sink. The framework also finds utility in accounting for additional nutrients in organic forms and testing hypotheses such as using Redfield stoichiometry, and is therefore an essential step toward comprehensively understanding and modelling the role of the coastal ocean in the global carbon cycle.     

A stage-specific cell-manipulation platform for inducing endothelialization on demand

Endothelialization is of great significance for vascular remodeling, as well as for the success of implanted vascular grafts/stents in cardiovascular disease treatment. However, desirable endothelialization on synthetic biomaterials remains greatly challenging owing to extreme difficulty in offering dynamic guidance on endothelial cell (EC) functions resembling the native extracellular matrix-mediated effects. Here, we demonstrate a bilayer platform with near-infrared-triggered transformable topographies, which can alter the geometries and functions of human ECs by tunable topographical cues in a remote-controlled manner, yet cause no damage to the cell viability. The migration and the adhesion/spreading of human ECs are respectively promoted by the temporary anisotropic and permanent isotropic topographies of the platform in turn, which appropriately meet the requirements of stage-specific EC manipulation for endothelialization. In addition to the potential of promoting the development of a new generation of vascular grafts/stents enabling rapid endothelialization, this stage-specific cell-manipulation platform also holds promise in various biomedical fields, since the needs for stepwise control over different cell functions are common in wound healing and various tissue-regeneration processes.     

图书馆信息咨询服务比较研究及发展对策

图书馆信息咨询在当前呈现新的趋势,服务范围、内容、方式得以不断的拓宽、深化和改善。通过对中外信息咨询服务进行对比,找出差距,提出完善我国信息咨询服务的策略。     

“工匠精神”融入高职院校德育工作路径研究

从“工匠精神”的特质出发,分析了当前“工匠精神”融入高职院校德育工作的必要性,提出了“工匠精神”融入高职院校德育工作的路径。     

Recent Advances in Constructing Interfacial Active Catalysts Based on Layered Double Hydroxides and Their Catalytic Mechanisms

The interaction between the metal and the support of supported metal catalysts, which are widely used in industry, is the primary focus of the study of such cat...     

阐释《古籍修复技术规范与质量要求》

《古籍修复技术规范与质量要求》是为了规范即将在全国图书馆开展的大规模古籍修复工作而制定的一个推荐性标准,内容涉及到古籍修复工作的各个方面.本文就标准的使用范围、结构、部分名词术语、质量工作标准以及在标准中反映的修复理念、技术等方面作了简要的说明.     

“双减”背景下科技馆的馆校结合新发展——基于内容分析法研究

“双减”时代的到来,为馆校结合带来了新的机遇与挑战,馆校结合也成为“双减”政策有效的实施手段。科技馆如何在“双减”背景下运用创新性方法开展馆校结合工作?本研究提取文件《关于利用科普资源助推“双减”工作的通知》的关键词作为调查重点,通过选取不同地区12座科技馆(或全国科普教育基地)作为研究样本,采用内容分析法,对其在“双减”期间开展的馆校结合活动案例及数据进行分析,从而呈现“双减”政策支持下的馆校结合新发展现状;从中发现馆校结合还存在各地区研学活动研发水平差异较大、馆校结合课后服务有所欠缺、馆校之间缺乏人才交流等问题,并针对以上问题逐一进行对策研究。     

关于高校学术权力弱化问题的思考

学术是大学的本质之所在;自由是学术的基本要求.学术权力来源于学者对某一学科知识领域的专长,它是大学的生命力.当今大学学术权力呈现日益弱化的趋势,强化学术权力,提高大学的学术气氛,时深化大学改革,促进大学发展,实现世界一流大学的梦想有很大的现实意义.     

从陶寺文化看尧舜部落联合体的性质

关于尧舜部落联合体的性质,学界或视作部落联盟,或以为属于酋邦,见解不一.本文通过对考古和文献材料的深入分析,并借鉴德国学者赫尔佐克关于贵族国家的理论模式,认为尧舜部落联合体当为贵族国家联盟,处于向统一的中央集权的贵族国家过渡的前夜.     

瞄准学科前沿、促进学科交叉、培养创新人才———科学基金重大项目“生命科学中的单分子行为研究”取得进展

生物单分子行为研究是指在单分子水平对重要生命现象进行的实时动态研究,需要以生命科学问题为核心进行多学科、多角度交叉合作进行研究,国际上有关该领域的研究也开始不久。国家自然科学基金委员会2003年启动的由北京大学韩启德院士主持的重大交叉项目“生命科学中的单分子行为研究”（项目批准号30490170）经过4年多的研究和不懈努力,取得了重要进展,日前已通过结题验收。