Low-threshold anisotropic polychromatic emission from monodisperse quantum dots.

Colloidal quantum dots (QDs) are solution-processable semiconductor nanocrystals with favorable optoelectronic characteristics, one of which is their multi-excitonic behavior that enables broadband polychromatic light generation and amplification from monodisperse QDs. However, the practicality of this has been limited by the difficulty in achieving spatial separation and patterning of different colors as well as the high pumping intensity required to excite the multi-excitonic states. Here, we have addressed these issues by integrating monodisperse QDs in multi-excitonic states into a specially designed cavity, in which the QDs exhibit an anisotropic polychromatic emission (APE) characteristic that allows for tuning the emission from green to red by shifting the observation direction from perpendicular to lateral.

Modified Hotz Procedure Combined With Modified Z-Epicanthoplasty Versus Modified Hotz Procedure Alone for Epiblepharon Repair.

Purpose: To compare the outcomes of the modified Hotz procedure alone and combined with modified Z-epicanthoplasty for correction of epiblepharon.

Methods: Seventy-one Chinese patients who underwent epiblepharon repair were divided into 2 groups. In group 1, 33 patients (59 eyes) were operated on with the modified Hotz procedure.

[IMMUNOGENICITY OF HUMAN UMBILICAL CORD BLOOD DERIVED MESENCHYMAL STEM CELLS AFTER OSTEOGENIC INDUCTION].

Objective: To study the immunological properties of osteogenically differentiated umbilical cord blood derived mesenchymal stem cells (UCB-MSCs).

Methods: UCB-MSCs were isolated from the umbilical cord vein, and were expanded; the cells at passage 3 were osteogenically induced for 2 weeks in vitro. The expressions of human leukocyte antigen I (HLA-I) and HLA-II molecules were observed by flow cytometry analysis before and after osteogenic induction.