نتایج جستجو برای: rearrangement energettc material
تعداد نتایج: 390784 فیلتر نتایج به سال:
Modern particle physics and cosmology support the idea that a background of invisible material pervades the whole universe, and identify in the cosmic vacuum the ultimate source of matter–energy, both seen and unseen. Within the framework of the theory of fundamental relativistic membranes, we suggest a self–consistent, vacuum energy–driven mechanism for dark matter creation through gauge symme...
A facile synthetic route to access polyfluoroalkyl functionalized cyclobutenes bearing an exo cyclic double bond from 3-aza-1,5-enynes is reported. The reaction proceeds via a thermal aza-Claisen rearrangement to give an allene-imine intermediate; subsequent cyclization affords the cyclobutene core. The kinetics of the transformation of starting material and the intermediate was studied by (1)H...
The use of high-modulus ceramic materials under conditions simulating the screen protection space objects from damage by fragments man-made debris is considered. introduction an aluminum jet at a speed ~10 km/s into barrier located behind brittle material screens was experimentally studied. A comparative analysis parameters residual cavity in made it possible to reveal effect structural rearran...
We present simple models of particulate materials whose mechanical integrity arises from a jamming process. We argue that such media are generically “fragile”, that is, they are unable to support certain types of incremental loading without plastic rearrangement. In such models, fragility is naturally linked to the marginal stability of force chain networks (granular skeletons) within the mater...
As the basis and preliminary work of future experimental study on PAHs formation under high temperature, theoretical computations on the intramolecular rearrangement reactions of sylvestrene (1-methyl-3-vinylcyclohexene) and 1,4-dimethyl-4-vinylcyclohexene are conducted and reveal that they may be transformed to themselves. The conversion between Dipentene and 2,4-dimethyl-4-vinylcyclohexen...
چکیده ندارد.
Gains of a single chromosome are frequent cytogenic findings in human cancer, but no molecular rearrangement has been consistently associated with any trisomy. In acute myeloid leukemia (AML), trisomy 11 (+11) occurring as a sole abnormality is the third most common trisomy. We have shown that the ALL1 gene, located at 11q23, can be rearranged as a result of a partial tandem duplication in two ...
The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Current research in materials has devoted much attention to graphene, with a considerable amount of the chemical manipulation going through the oxidized state of the material, known as graphene oxide (GO). In this report, the hydroxyl functionalities in GO, the vast majority th...
Thermal rearrangement of propargyl naphthyl ethers produced naphthopyrans. In the presence of sodium methoxide, propargyl naphthyl ethers were converted easily to naphthofurans and naphthodifurans in good yields
Clonal expansion of mixed-lineage leukemia (MLL) rearrangements is highly indicative for acute leukemia. 1-5 Here, we report the unusual finding of an MLL rearrangement in the absence of leukemia. A 5-year-old girl was diagnosed with acute myeloid leukemia (AML) characterized by a variant t(8;21) translocation. The patient achieved remission, and is now, 4 years later, still in ongoing remissio...
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