【摘 要】
：
Creating a single surfactant that is open to manipulation,while maintaining its surface activity,robustness,and compatibility,to expand the landscape of surfact
【机 构】
：
Institut Für Chemie Und Biochemie,Freie Universit(a)t Berlin,Takustrasse 3,14195 Berlin,Germany;John
论文部分内容阅读
Creating a single surfactant that is open to manipulation,while maintaining its surface activity,robustness,and compatibility,to expand the landscape of surfactant-dependent assays is extremely challenging.We report an oxidation-responsive precursor with thioethers and multiple 1,2-diols for creating a variety of functional surfactants from one parent surfactant.Using these multifunctional surfactants,we stabilize microfluidics-generated aque-ous droplets.The droplets encapsulate different components and immerse in a bioinert oil with distinct interfaces where an azide-bearing surfactant allow fishing of biomolecules from the droplets,aldehyde-bearing surfactant allow fabrication of microcapsules,and hydroxyl-bearing surfactants,with/without oxidized thioethers,allow monitoring of single-cell gene expression.Creating multifunctional surfactants poses opportunities for broad applications,including adsorption,bioanalytics,catalysis,formulations,coatings,and programmable subset of emulsions.
其他文献
高速铁路橡胶垫板是扣件系统的重要组成部分.采用热重分析仪分析了国内8家生产企业生产的橡胶垫板的生胶含量和组成、补强剂和无机填料含量,用硫化仪分析了硫化特性,并对橡胶
对不同羧基含量的碳纳米管(MWCNT)和不同官能团的石墨烯改性的丁腈橡胶进行了力学性能和水润滑条件下摩擦系数、摩擦表面形貌和体积磨损的测试分析,结合SEM电镜形貌分析,揭示不同官能团/不同维度碳纳米材料的作用机制。结果表明,不同官能团/不同维度碳纳米材料能够不同程度地提高丁腈橡胶的力学性能,显著降低水润滑下的动、静摩擦系数;带有—COOH的MWCNT和石墨烯对水润滑体系的摩擦系数改善效果较优,并且低羧基含量的MWCNT改善效果优于高羧基含量的MWCNT;添加羧基石墨烯后较对比样体积磨损量减少80%。不同官
综述了苯乙烯-丁二烯-苯乙烯嵌段共聚物极性化在大分子化学改性和负离子原位聚合改性这两种方法中的研究进展,详细阐述了两种方法的技术手段及优缺点,并对极性化后SBS的应用进行简单概述。
针对中国石油吉林石化公司产三元乙丙橡胶J-4045开展试验。通过调整J-4045配方中过氧化物硫化剂的加料量,研究了过氧化二异丙苯(DCP)用量以及温度对J-4045硫化性能的影响。利用无转子硫化仪测试了9个样品分别在140℃、150℃、160℃、170℃时的硫化曲线,找出了J-4045采用DCP充当硫化剂的最佳温度为160℃,发现了J-4045的DCP硫化体系正硫化时间与DCP用量无关,只与硫化温度有关,最大扭矩随DCP用量增加而增加,门尼焦烧时间随DCP用量增加而变短。
为生产出易于人体吸收的锌补充剂,提高加工副产物罗非鱼皮的利用价值,该试验以锌离子螯合率为指标,筛选最佳活性的胶原蛋白肽,通过高效液相色谱对其分子质量分布进行测定。运用紫外光谱、傅里叶红外光谱、原子力显微镜和扫描电镜对螯合前后的结构变化进行表征。此外,采用体外模拟胃肠道消化模型,对肽-锌螯合物中锌离子溶解率进行评估。研究结果表明,碱性蛋白酶制备的胶原蛋白肽的锌离子螯合率在6 h达到最高值0.075μmol/mg;其在200~1000 Da区间分布占比89.49%;紫外和红外光谱结果表明,胶原蛋白肽的酰胺键、
呕吐毒素在玉米、小麦和大麦等谷物和禽畜饲料中检出率很高,是污染最严重的霉菌毒素之一,严重危害食品安全。因此,如何高效安全地去除呕吐毒素成为研究的热点。相比传统的物理和化学处理方法,生物降解法因具有高效、对环境友好和特异性强等优势而广受关注。作者概述了生物降解呕吐毒素的方法,重点总结了降解菌株的种类、降解酶及其基因,并且阐述了其在实际应用中的局限和前景。
The core reactions for fuel cells,rechargeable metal-air batteries,and hydrogen fuel production are the oxygen reduction reaction(ORR),oxygen evolution reaction(OER),and hydrogen evolution reaction(HER),which are heavily dependent on the efficiency of ele
针对海洋固定平台钻修井机作业劳动强度大、危险系数高、作业环境恶劣等问题,研制出了管柱自动化处理系统解决方案,主要包括动力二层台、导向定位装置、二层台机械手、铁钻工
Fluorescence lifetime imaging microscopy(FLIM)has been rapidly developed over the past 30 years and widely applied in biomedical engineering.Recent progress in fluorophore-dyed probe design has widened the application prospects of fluorescence.Because flu
Flexible pressure sensors are unprecedentedly studied on monitoring human physical activities and robotics.Simultaneously,improving the response sensitivity and sensing range of flexible pressure sensors is a great challenge,which hinders the devices’prac