A particular research AZD2171 molecular weight effort has been focused on developing new materials with high ZT values, which are essential for TEs to be commercially applicable in refrigeration and waste heat recovery. Several promising bulk
semiconductors have been reported by researchers so far. However, no satisfactorily high ZT value has been obtained. In a recent publication, [E. J. Skoug et al., Appl. Phys. Lett. 96, 181905 (2010)] reported very low lattice thermal conductivity on chalcogenide semiconductors and pointed out their potential for thermoelectricity. Following their findings, transport properties of these materials and some other promising bulk semiconductors, Bi(2)Te(3), SrTiO(3), and Cu(2)ZnSnSe(4), were systematically analyzed using density functional and Boltzmann transport theories. In order to assess their capacity SB202190 research buy as thermoelectrics, a simple measure: ‘maximum’ thermoelectric figure of merit, ZT(m),
was predicted at experimentally amenable doping levels. Results with higher ZT(m) values were obtained when compared to the current state of bulk thermoelectric materials. However, it is also found that reaching required ZT values for commonplace device applications with either these chalcogenides or the other semiconductors reported in our study is highly unlikely. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3597823]“
“Smith-Magenis syndrome (SMS) is a rare syndrome with multiple congenital malformations, including development and mental retardation, behavioral problems and a distinct facial appearance. find more SMS is caused by haploinsufficiency of RAI1 (deletion or mutation of RAI1). We describe an eight-year-old female Chinese patient with multiple malformations, congenital heart defect, mental retardation, and behavioral problems (self hugging, sleeping disturbance). High-resolution genome wide single nucleotide polymorphism array revealed a 3.7-Mb deletion in chromosome region 17p11.2. This chromosome region contains RAI1, a critical gene involved in SMS. To
the best of our knowledge, this is the first report of an SMS patient in mainland China.”
“Huge areas of diverse tropical forest are lost or degraded every year with dramatic consequences for biodiversity. Deforestation and fragmentation, over-exploitation, invasive species and climate change are the main drivers of tropical forest biodiversity loss. Most studies investigating these threats have focused on changes in species richness or species diversity. However, if we are to understand the absolute and long-term effects of anthropogenic impacts on tropical forests, we should also consider the interactions between species, how those species are organized in networks, and the function that those species perform. I discuss our current knowledge of network structure and ecosystem functioning, highlighting empirical examples of their response to anthropogenic impacts.