TiO2-like polymer films were synthesized by inductively coupled plasma in pulsed radio-frequency (RF) modes. The plasma chemistry, studied by optical emission spectroscopy, showed that the ra- dicals and fragments for...TiO2-like polymer films were synthesized by inductively coupled plasma in pulsed radio-frequency (RF) modes. The plasma chemistry, studied by optical emission spectroscopy, showed that the ra- dicals and fragments formed in the discharge were dependent on the precursor, and that the species density in the plasma gas is as a function of flux de gas that is used to carry the monomer into the plasma reactors.展开更多
The regulation of plant growth responds to many stimuli. These responses allow environmental adaptation, thereby increasing fitness. In many cases, the relay of information about a plant＇s environment is through plan...The regulation of plant growth responds to many stimuli. These responses allow environmental adaptation, thereby increasing fitness. In many cases, the relay of information about a plant＇s environment is through plant hormones. These messengers integrate environmental information into developmental pathways to determine plant shape. This re- view will use, as an example, auxin in the root ofArabidopsis thaliana to illustrate the complex nature of hormonal signal processing and transduction. It will then make the case that the application of a systems-biology approach is necessary, if the relationship between a plant＇s environment and its growth/developmental responses is to be properly understood.展开更多
Tension-tension fatigue life tests on nano-grained delaminated low-carbon steel sheet under different fatigue loads are carried out to study the fatigue properties of the steel. The three-dimensional microstructures o...Tension-tension fatigue life tests on nano-grained delaminated low-carbon steel sheet under different fatigue loads are carried out to study the fatigue properties of the steel. The three-dimensional microstructures of the steel are observed by TEM. In addition, the morphology of the fatigue fracture of the specimen under different loads is observed by SEM. The results show that micro-cracks form on the weak interface of the nano-grained steel under low-stress conditions, which hinders the propagation of the main cracks and reduces the fatigue crack propagation rate, resulting in the extending fatigue life of the steel.展开更多
文摘TiO2-like polymer films were synthesized by inductively coupled plasma in pulsed radio-frequency (RF) modes. The plasma chemistry, studied by optical emission spectroscopy, showed that the ra- dicals and fragments formed in the discharge were dependent on the precursor, and that the species density in the plasma gas is as a function of flux de gas that is used to carry the monomer into the plasma reactors.
文摘The regulation of plant growth responds to many stimuli. These responses allow environmental adaptation, thereby increasing fitness. In many cases, the relay of information about a plant＇s environment is through plant hormones. These messengers integrate environmental information into developmental pathways to determine plant shape. This re- view will use, as an example, auxin in the root ofArabidopsis thaliana to illustrate the complex nature of hormonal signal processing and transduction. It will then make the case that the application of a systems-biology approach is necessary, if the relationship between a plant＇s environment and its growth/developmental responses is to be properly understood.
基金supported by the National Natural Science Foundation of China under grant No. 50371073
文摘Tension-tension fatigue life tests on nano-grained delaminated low-carbon steel sheet under different fatigue loads are carried out to study the fatigue properties of the steel. The three-dimensional microstructures of the steel are observed by TEM. In addition, the morphology of the fatigue fracture of the specimen under different loads is observed by SEM. The results show that micro-cracks form on the weak interface of the nano-grained steel under low-stress conditions, which hinders the propagation of the main cracks and reduces the fatigue crack propagation rate, resulting in the extending fatigue life of the steel.
