Have you lookedunderthe bed? 你看了床底下没有? 牛津词典 She placed the ladderunder(= just lower than) the window. 她把梯子立在窗户下面。 牛津词典 The dog squeezedunderthe gate and ran into the road. 狗从门底下钻出去,跑到大路上去了。
TMS was obtained by radical bromination of 2,3,4,5-tetramethoxytoluene and subsequently modified using a one-pot Wittig reaction21. This cost-effective synthesis could be completed in 16 h with a moderate yield. For PMS, additional steps were necessary to get five methoxy groups on a ...
large area along this hollow microchannel. Gas self-transportation can be extended to laser-drilled microholes through a thin PTFE sheet, which can even achieve anti-buoyancy unidirectional penetration. The gas can overcome the bubble’s buoyance and spont...
A morning mist hung over it now—a fulsome yet magnificent silvery veil, full of light from the sun, yet semi-opaque—the hedge behind it being in some measure hidden by its hazy luminousness. Up the sides of this depression grew sheaves of the common rush, and here and there a ...
(light quantity) and the ratio of red to far-red light (light quality) is perceived as a warning signal in plants, thereby triggering adaptive changes in shoot morphology18,19,20,21. Light-dependent resource allocation has been shown to be tightly linked with defence signalling inArabidopsis ...
An efficient and practical synthesis of triaryl and trisindolylmethanes is reportedviathe bisarylation of aryl aldehydes with activated arenes. The new method features mild solvent-free reaction conditions, in most cases nearly stoichiometric reagent ratios, catalytic amount of the readily available, eas...
Tunable luminescence properties of the novel Tm 3+ - and Dy 3+ -codoped LiLa(MoO 4 ) x (WO 4 ) 2x phosphors for white light-emitting diodes A series of Tm3+- and Dy3+-codoped LiLa(MoO4)x(WO4)2−xphosphors were preparedviathe conventional solid-state reaction method. It was dis...
In order to study the coupled effect of the temperature and pressure on pyrolysis characteristics and pore and fracture structures of oil shale, a total of 25 groups of pyrolytic reaction experiments have been conducted on 14 mm long and 7 mm in diameter cylindrical oil shale specimens under dif...
radical intermediate, in which both photogenerated electrons and holes participate in the reaction. Access options Access Nature and 54 other Nature Portfolio journals Get Nature+, our best-value online-access subscription 24,99 €/ 30 days
The dissolved species in the solution were determined and unreacted andreacted sample-surface chemical components involved or uninvolved in reaction were analyzed usingX-ray photoelectron spectroscopy (XPS). The results revealed two different mechanisms of dissolutionof basalt in acidic and basic solutions...