Testicular Busulfan Injection in Mice to Prepare Recipients for Spermatogonial Stem Cell Transplantation Is Safe and Non-Toxic.

Current methods of administering busulfan to remove the endogenous germ cells cause hematopoietic toxicity, require special instruments and a narrow transplantation time.We use a direct testicular injection of busulfan method for preparing recipients for SSC transplantation.Male ICR mice (recipients) were divided into four groups, and two experimen

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A New Enantiornithine (Aves) Preserved in Mid-Cretaceous Burmese Amber Contributes to Growing Diversity of Cretaceous Plumage Patterns

Recent discoveries of enantiornithine birds trapped in amber have decreased the lower size limit of members of this clade, increased their morphological diversity, and provided significant new data regarding their plumage.Here, we describe a new specimen that consists of the distal extremities of both forelimbs and hindlimbs.Size and morphology sug

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