The model appears to explain most, if not all, of the experimental findings reported to date on semiconductor nanotubes. It addresses various issues related to the uniqueness of the single-walled
and multiwalled carbon nanotube growths; this website it explains why almost all carbon nanotubes are grown at a temperature between 800 and 1000 degrees C; and why metals, semiconductors, oxides, and clusters serve almost equally well as FECAs to achieve these growths. (C) 2010 American Institute of Physics. [doi:10.1063/1.3474650]“
“We propose a general formalism to describe accurately the angular dependence of the magnetoresistance. A parabolic band model is used to determine without approximation the conductance of arbitrary HM781-36B complex heterostructures. Simple analytical expressions are obtained in some limit cases. Particularly, we show that significant deviation from the cosine dependence is expected for ferromagnetic
barriers. Numerical computations are used to quantify the deviation from the cosine dependence for normal and ferromagnetic barriers and support the precedent conclusion. Finally, the influence of the applied voltage on the angular dependence of magnetoresistance is discussed. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3466778]“
“Background: The performance of exercise while immersed in cold water has been shown to influence energy intake in the subsequent meal. However, the effect of ambient temperature during land-based exercise is not known.
Objectives: Our aims were to investigate the effect of exercise performed in the heat on energy intake in the subsequent meal and to determine concentrations of
circulating appetite-related hormones.
Design: In a randomized, counterbalanced design, 11 active male participants ARN-509 supplier completed 3 experimental trials in a fasted state: exercise in the heat (36 degrees C), exercise in a neutral temperature (25 degrees C), and a resting control (25 degrees C). The exercise trials consisted of treadmill running for 40 min at 70% (V) over dotO(2peak). After each trial, participants were presented with a buffet-type breakfast of precisely known quantity and nutrient composition, which they could consume ad libitum.
Results: Energy intake was greater after exercise in the neutral temperature compared with the control (P = 0.021) but was similar between exercise in the heat and the control and between the 2 exercise trials. When accounting for the excess energy expended during exercise, relative energy intake during exercise in the heat was lower than the control (P = 0.002) but was similar between exercise in the neutral temperature and the control and between exercise in the heat and in the neutral temperature. The lower relative energy intake after exercise in the heat was associated with an elevated tympanic temperature and circulating concentrations of peptide YY (P < 0.05).