搜索结果: 106-120 共查到“国际动态 化学”相关记录583条 . 查询时间(0.274 秒)
A team of chemists led by Carnegie Mellon University’s Rongchao Jin has for the first time conducted site-specific surgery on a nanoparticle. The procedure, which allows for the precise tailoring of n...
Squeezing Every Drop of Fresh Water from Waste Brine
Squeezing Every Drop Fresh Water Waste Brine
2017/7/21
Engineers at the University of California, Riverside have developed a new way to recover almost 100 percent of the water from highly concentrated salt solutions. The system will alleviate water shorta...
Water forms 'spine of hydration' around DNA,group finds
Water forms spine of hydration around DNA group finds
2017/7/20
Water is the Earth’s most abundant natural resource, but it’s also something of a mystery due to its unique solvation characteristics – that is, how things dissolve in it.“It’s uniquely adapted to bio...
Uncovering the answer to an age-old question:how do snowflakes form?
Uncovering the answer age-old question snowflakes form
2017/7/20
More than 400 years ago, renowned mathematician and scientist Johannes Kepler speculated about the creation of one of nature’s most angelic and unique shapes: the six-sided snowflake. Although atoms w...
Sculpting optical microstructures with slight changes in chemistry
Sculpting optical microstructures slight changes chemistry
2017/4/27
In 2013, materials scientists at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and the Wyss Institute of Biologically Inspired Engineering grew...
俄罗斯与比利时物理学家合作观测超重原子核结构
超重原子核结构 超重元素
2017/3/21
俄罗斯与欧洲的物理学家借助重型激光炮观测超重核，首次接触到超重核的物理属性。超重元素在自然状态中并不存在，人工合成的数量也极少，而且超重元素原子核极易崩解，存在时间往往只有十分之一秒，因此人类对其结构了解极其有限。
摩擦纳米发电机首次用于高灵敏度质谱仪
摩擦纳米发电机 高灵敏度 质谱仪 分析仪器
2017/3/1
日前，美国佐治亚理工学院、中科院北京纳米能源与系统研究所王中林院士带领科研团队，用摩擦纳米发电机驱动离子源，实现了离子源在电荷数量、正负极性、信号长短等诸多方面的精确控制。该工作为质谱分析提供了一个全新的可控参数，也是纳米发电机在大型分析仪器上的首次应用，相关成果发表于最新一期的《自然—纳米技术》。目前，质谱分析已经被广泛应用于生物医药、食品科学、国土安全、系统生物、药物发现等领域。在质谱分析中，...
美国斯坦福大学教授崔屹团队日前开发出一种基于半波整流交流电的电化学方法，可从海水中高效提取铀，较之传统的物理化学吸附法，提取能力提升了8倍，速度则提升了3倍。相关成果发表在最新的英国《自然·能源》杂志上。
Polymer additive could revolutionize plastics recycling
Polymer additive revolutionize plastics recycling
2017/3/14
When Geoffrey Coates, the Tisch University Professor of Chemistry and Chemical Biology, gives a talk about plastics and recycling, he usually opens with this question: What percentage of the 78 millio...
Four-Stroke Engine Cycle Produces Hydrogen from Methane and Captures CO2
Four-Stroke Engine Cycle Produces Hydrogen Methane CO2
2017/3/14
When is an internal combustion engine not an internal combustion engine? When it’s been transformed into a modular reforming reactor that could make hydrogen available to power fuel cells wherever the...
Roses are red. Violets are blue.What gives flowers those eye-catching hues?
Roses are red Violets are blue flowers eye-catching hues
2017/2/16
To solve the mystery of why roses are red and violets are blue, scientists are peering into the genes of plant petals."When you ask anyone how one flower is different from another, for most of us, col...
Up,Up and Away:USU Chemists say 'Yes,'Helium Can Form Compounds
USU Chemists Helium Can Form Compounds
2017/2/16
Can helium bond with other elements to form a stable compound? Students attentive to Utah State University professor Alex Boldyrev’s introductory chemistry lectures would immediately respond “no.” And...
Although helium is the second most-abundant element (after hydrogen) in the universe, it doesn’t play well with others. It is a member of a family of seven elements called the noble gases, which are c...
Academics build ultimate solar-powered water purifier
Academics solar-powered water purifier
2017/2/16
You’ve seen Bear Grylls turn foul water into drinking water with little more than sunlight and plastic.Now, academics have added a third element — carbon-dipped paper — that may turn this survival tac...