نتایج جستجو برای: nano chemistry
تعداد نتایج: 157917 فیلتر نتایج به سال:
polycyclic aromatic hydrocarbons (such as, anthracene, benzo[a]pyrene and so on) are non-polar, hydrophobic compounds, which are not ionized. they are only slightly soluble in water. they are very dangerous compounds in the environment. the single-walled carbon nanotube (swnt) is used for removal and conversion of anthracene to low-risk products. in this study, electron transfer between anthrac...
A breakthrough has been discovered in pathology chemistry related to increasing molecular structure that can interfere with oxygen diffusion through cell membranes. Free radicals can crosslink unsaturated low-viscosity fatty acid oils by chain-growth polymerization into more viscous liquids and even solids. Free radicals are released by mitochondria in response to intermittent hypoxia that can ...
To understand the influence of slag chemistry on carbonation resistance slag-rich cement, this paper explored characteristics blended cement systems with different Al2O3 contents in through accelerated test. Irrespective chemistry, three main CO2 binding phases were identified during test, i.e. carbonated Ca-Al AFm (amorphous or nano-crystalline), hydrotalcite-like phase, and calcium carbonate ...
Nano- and microparticles of various shapes have recently been introduced for various drug-delivery applications. Shape of particles has been shown to have an impact on various processes including circulation, vascular adhesion and phagocytosis. Here, we assess the role of particle geometry and surface chemistry in their interactions with cell membranes. Using representative particles of differe...
Cryo-electron microscopy has evolved in an established approach to study the structure of bio-colloids. Recent developments in instrumentation and automation, often demanded by life sciences, made cryo-EM a general tool in colloid chemistry. Recently improved instrumentation for vitrification has resulted in reliable and reproducible preparation of specimen in water and other solvents. A dynami...
van der Waals solids Guanhui Gao1,2,II, Wei Gao, E. Cannuccia4,II, Jaime Taha-Tijerina, Luis Balicas, Akshay Mathkar, T.N. Narayanan, Zhen Liu, Bipin K. Gupta, Juan Peng, Yansheng Yin*, Angel Rubio *, Pulickel M. Ajayan * Department of Mechanical Engineering & Materials Science, Rice University, Houston, Texas 77005, United States Institute of Materials Science and Engineering, Ocean University...
In the environments where stars and planets form, about one percent of the mass is in the form of micro-meter sized particles known as dust. However small and insignificant these dust grains may seem, they are responsible for the production of the simplest (H(2)) to the most complex (amino-acids) molecules observed in our Universe. Dust particles are recognized as powerful nano-factories that p...
New insights into the architecture and formation mechanisms of calcific lesions down to the nanoscale open a better understanding of atherosclerosis and its pathogenesis. Scanning electron - and atomic force microscope based nano-analytical characterization techniques were adapted to the assessment of an ex-vivo calcified coronary artery. Human atherosclerotic tissue and bone tissue reside a ty...
State Key Laboratory of Catalysis, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian 116023, China. SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China. Beijing National Lab...
Microsized particles play an important role in many diverse areas of science and technology, for example, surface reactions of micron-sized particles play a key role in astrochemistry, plasma reactors and atmospheric chemistry. To date much of our knowledge of such surface chemistry is derived from 'traditional' surface science-based research. However, the large surface area and morphology of s...
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