The expression and mutation of and its association with litter size in small-tail Han sheep ().

Previous studies have shown that promotes follicular development and ovarian granulosa cell proliferation, thereby affecting ovulation in mammals. In this study, the expression and polymorphism of the gene associated with litter size in small-tail Han (STH) sheep were determined. The expression of was detected in 14 tissues of STH sheep during the follicular phase as well as in the hypothalamic-pituitary-gonadal (HPG) axis of monotocous and polytocous STH sheep during the follicular and luteal phases using quantitative polymerase chain reaction (qPCR).

Efficient and Recyclable RuCl ⋅ 3HO Catalyst Modified with Ionic Diphosphine for the Alkoxycarbonylation of Aryl Halides.

A series of ionic (mono-/di-)phosphines (, , and ) with structural similarity and their corresponding neutral counterparts (, , and ) were applied to modulate the catalytic performance of RuCl ⋅ 3HO. With the involvement of the ionic diphosphine (), in which the two phosphino-fragments were linked by butylene group, RuCl ⋅ 3HO with advantages of low cost, robustness, and good availability was found to be an efficient and recyclable catalyst for the alkoxycarbonylation of aryl halides. The -based RuCl ⋅ 3HO system corresponded to the best conversion of PhI (96 %) along with 99 % selectivity to the target product of methyl benzoate as well as the good generality to alkoxycarbonylation of different aryl halides (ArX, X=I and Br) with alcohols MeOH, EtOH, -PrOH and -BuOH.

[The image diagnosis of dysbaric osteonecrosis].

Objective: To investigate the imaging features of dysbaric osteonecrosis.

Methods: The imaging appearances of four patients with dysbaric osteonecrosis caused by diving, were analyzed retrospectively.

Results: In four cases with dysbaric osteonecrosis including case 1 with stage I, case 2 with stage II, case 3 and case 4 with stage III, there were a case with the lesion in a bone and other 3 cases with lesions in multiple bones,and a case with the lesion in unilateral bone and 3 cases with the lesions in lateral bones.