Results 21 to 30 of about 64,401 (264)

蛋白质N-磷酸化修饰富集方法进展

open access: yesSe pu = Chinese journal of chromatography
蛋白质磷酸化作为一种最普遍和最重要的翻译后修饰调控着几乎所有的生命过程。随着高效富集方法和生物质谱技术的快速发展,低丰度的蛋白质O-磷酸化修饰获得了规模化鉴定,从而使其生物学功能得到较为透彻的研究。而发生在组氨酸、赖氨酸和精氨酸侧链氨基的N-磷酸化修饰,由于P-N键化学稳定性差,导致其在酸和热条件下不稳定。而目前依赖酸性条件的O-磷酸化富集方法难以适用N-磷酸化富集,导致蛋白质N-磷酸化生物功能研究严重滞后。因此,迫切需要发展针对蛋白质N-磷酸化的高效富集方法。本文首先介绍了蛋白质N ...
Bo Jiang   +5 more
semanticscholar   +1 more source

不同水胶比及比表面积对磷酸镁水泥强度的影响

open access: yes工程技术研究, 2020
研究磷酸镁水泥在不同氧化镁比表面积下的最佳水胶质量配比 . 通过改变磷酸镁水泥在配合过程中的氧化镁的比表面积,水和胶体的质量比,通过凝结时间试验和抗压强度试验,分析两种因素产生的影响,并得出在不同氧化镁比表面积下的最佳水胶质量配合比 . 发现氧化镁比表面积为 420-440mm2/g、320-340mm2/g、220-240mm2/g 对应分别选用水胶比为0.16、0.14、0.12 的比率,可以在前期取得更高强度,但后期的影响相差不大 .关键词:磷酸镁水泥,不同水胶比及比 ...
浩 李, 琦宏 朱
semanticscholar   +1 more source

Achieving High‐Performance SiO@C Anode of Li‐Ion Batteries via a One‐Step Prelithiated Preparation Strategy

open access: yesRare Metals, EarlyView.
ABSTRACT Silicon oxide (SiO) is becoming the main anode for high‐energy lithium‐ion batteries because of its ease of manufacture, outstanding cycling stability, and high capacity. However, low initial Coulombic efficiency (ICE) caused by the irreversible reaction of silica, as the main issue, strictly limits its commercial applications.
Hailong Mei   +5 more
wiley   +1 more source

东巢湖沉积物水界面氮、磷、氧迁移特征及意义

open access: yes, 2020
以东巢湖近城市湖湾沉积物为研究对象,在沉积物氮、磷营养盐分析的基础上,采用沉积物柱状芯样静态释放模拟法定量评估研究区域沉积物-水界面氨氮、溶解性活性磷酸盐营养盐释放潜力,利用微电极非损伤测定技术获得沉积物-水微界面溶解氧(DO)剖面分布及微界面DO消耗和扩散特征.结果表明:东巢湖近城市湖湾沉积物氮、磷污染物蓄积量较高,受TN、TP污染程度较重.沉积物内源氨氮、磷酸盐释放明显,平均释放速率分别达到32.44 mg/(m2·d)和1.25 mg/(m2·d),区域内沉积物已成为水柱中氮、磷营养盐的污染源 ...
李运奔   +11 more
semanticscholar   +1 more source

F‐Mediated Precise Control Over Amorphous/Crystalline Fe/Ni‐Based Phosphides Heterostructure for Efficient Oxygen Evolution Reaction

open access: yesRare Metals, EarlyView.
ABSTRACT Transition metal‐based amorphous/crystalline (a/c) heterostructured catalysts have garnered significant attention due to their exceptional activity, stability, and cost‐effectiveness. However, the precise synergistic regulation of interfacial composition and phase states remains challenging.
Haoran Li   +3 more
wiley   +1 more source

钙离子添加对沉水植物菹草(Potamogeton crispus L.)和金鱼藻(Ceratophyllum demersum L.)富集水体磷的影响

open access: yes, 2020
沉水植物光合作用形成的微环境有利于水体中钙和磷形成CaCO3-P共沉淀,从而将水体中的磷永久性去除,避免植物腐烂后的二次污染.但不同的沉水植物种类形成CaCO3-P共沉淀的能力不同.本文以沉水植物菹草(Potamogeton crispus L.)和金鱼藻(Ceratophyllum demersum L.)为实验对象,研究水体中添加钙离子(0、100 mg/L)对水体磷(磷浓度:0、0.2、2 mg/L)的去除和植物富集磷的差异,并通过植物灰分磷的组分分析,聚焦植物钙磷的变化 ...
Chen Qi, Rivers, Wang Heyun
semanticscholar   +1 more source

Double‐Hollow Porous Heterostructured CoP/Cu3P Microspheres for High‐Performance Asymmetric Supercapacitors

open access: yesRare Metals, EarlyView.
ABSTRACT CoP has become a research hotspot for supercapacitor electrode materials because of its considerable theoretical capacitance and metalloid nature, but its commercial application remains hampered by structural instability and sluggish ion kinetics.
Gaoliang Wang   +8 more
wiley   +1 more source

NIR‐Responsive Nano‐Integrated Magnesium Phosphate Cement Promotes Bone Regeneration via Osteoblast‐Exosome‐Osteoclast Crosstalk

open access: yesRare Metals, EarlyView.
ABSTRACT The limited osteogenic capacity of magnesium phosphate cement (MPC) has constrained its biomedical applications, underscoring the necessity to develop MPC with enhanced physical properties and bone‐forming capabilities. In this study, a multifunctional MPC system was developed by incorporating zoledronic acid‐loaded near‐infrared (NIR ...
Bin Wang   +8 more
wiley   +1 more source

Acid‐Etched Co‐Vacancy‐Tunable CoFeP/N,P‐Codoped Carbon Nanocages for Highly Efficient Alkaline Water Electrolysis

open access: yesRare Metals, EarlyView.
ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan   +6 more
wiley   +1 more source

Bimetallic Mo/Fe‐Doped CoP2 Nanoleaf Array as a Bifunctional Electrocatalyst for Overall Water Splitting

open access: yesRare Metals, EarlyView.
ABSTRACT The development of efficient and stable bifunctional catalysts remains a key challenge for green hydrogen production via electrochemical water splitting. In this study, a bimetallic Mo/Fe‐doped CoP2 nanoleaf array anchored on carbon cloth (Mo, Fe‐CoP2@CC) was synthesized from zeolitic imidazolate framework‐L (ZIF‐L) via an ion‐exchange and low‐
Xiangqun Zeng   +6 more
wiley   +1 more source

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