We study the process e+ e- →(D* D*)± π∓ at a center-of-mass energy of 4.26 GeV using a 827  pb(-1) data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be (137±9±15)  pb. We observe a structure near the (D* D*)± threshold in the π∓ recoil mass spectrum, which we denote as the Zc±(4025). The measured mass and width of the structure are (4026.3±2.6±3.7)  MeV/c2 and (24.8±5.6±7.7)  MeV, respectively. Its production ratio σ(e+ e- → Zc±(4025)π∓ → (D* D*)± π∓)/σ(e+ e- → (D* D*)± π∓) is determined to be 0.65±0.09±0.06. The first uncertainties are statistical and the second are systematic.

The nano-particles precipitated along basal and non-basal dislocation lines in an Mg88Co5Y7 (at.%) alloy during compression at 200 C are observed. Aberrationcorrected scanning transmission electron microscopic studies indicate that the nanoprecipitate, with approximately 10 nm in diameter, has a face-centered cubic structure (a = 0.523 nm). The nano-precipitate and Mg matrix exhibit an orientation relationship of (111) fcc ∥ (0001) Mg and [11 ̅ 0] fcc ∥ [21 ̅ 1 ̅ 0] Mg. We propose hot compressioninduced dislocations should be responsible for activating the atomic motion of solutes and succedent precipitation. The present study indicates segregation of supersaturated solutes along the defects should be considered in Mg alloys upon deformation at medium temperatures.

ABSTRACT. Rapid and efficient growth is a major consideration and challenge for global mariculture. The differential growth rate of the sea cucumber, Apostichopus japonicus, has significantly hampered the total production of the industry. In the present study, forward and reverse suppression subtractive hybridization libraries were constructed and sequenced from a fast-growth group and a slow-growth group of the sea cucumber. A total of 142 differentially expressed sequence tags (ESTs) with insertions longer than 150 bp were identified and further analyzed. Fifty-seven of these ESTs (approximately 40%) were functionally annotated for cell structure, energy metabolism, immunity response, and growth factor categories. Six candidate genes, arginine kinase, cytochrome c oxidase subunit I, HSP70, β-actin, ferritin, and the ADP-ribosylation factor, were further validated by quantitative PCR. Significant differences were found between the fast-and slow-growth groups (P < 0.05) for the expression levels of arginine kinase, cytochrome 3029 ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 12 (3): 3028-3037 (2013) Differentially expressed genes in A. japonicus growth c oxidase, HSP70, the ADP-ribosylation factor, and β-actin. However, no significant difference was observed for ferritin. Our results provide promising candidate gene markers for practical size screening, and also further promote marker-assisted selective breeding of this species.