In Situ Growth of 3D/2D (CsPbBr/CsPbBr) Perovskite Heterojunctions toward Optoelectronic Devices.

Two-dimensional (2D) CsPbBr exhibits intriguing functions in enhancing the performance of optoelectronic devices in terms of environmental stability and luminescence properties when composited with other perovskites in different dimensionalities. We built a type I three-dimensional (3D) CsPbBr/2D CsPbBr heterojunction through phase transition where CsPbBr quantum dots in situ grew into 2D CsPbBr. A thorough growth mechanism study in combination with excited state dynamic investigations via femtosecond spectroscopy and first-principles calculations revealed that the type I hierarchy enhanced the stability of the heterojunction and spurred its luminous quantum yield by prolonging the lifetime of photogenerated carriers.

The association between MMP-12 82 A/G polymorphism and susceptibility to various malignant tumors: a meta-analysis.

Matrix metalloproteinases (MMPs) are a family of zinc-dependent endopeptidases responsible for degrading essentially all components of the extracellular matrix (ECM). Accumulating evidence suggests that MMPs might play a critical role in growth, invasion, and metastasis of malignant tumors. A single nucleotide polymorphism (SNP) in the promoter region of MMP-12, MMP-12 82 A/G (rs2276109), has been recognized to play a critical role in regulating the expression of MMP-12, however, its correlation with tumor susceptibility remains controversial.

Enhanced expression of stem cell markers and drug resistance in sphere-forming non-small cell lung cancer cells.

There is growing evidence suggesting that cancer stem cells (CSCs) are playing critical roles in tumor progression, metastasis and drug resistance. However, the role of CSCs in non-small cell lung cancer (NSCLC) remains elusive. In this study, we enriched for stem-like cells from tumor spheres derived from NSCLC cell line A549 cultured in serum-free medium.

NRSN2 promotes non-small cell lung cancer cell growth through PI3K/Akt/mTOR pathway.

Neurensin-2 (NRSN2), a small neural membrane protein which localized in small vesicles in neural cells. Recent report suggested that Neurensin-2 might play a suppressive role in tumor. While the biological functions and molecular mechanisms in cancer progression remain unknown.

[Abnormalities of meiotic recombination in Han Chinese azoospermic patients].

Objective: To analyze defective homologous chromosomal recombination in Han Chinese azoospermic patients.

Methods: Testicular biopsy samples from 7 healthy controls and 7 Han Chinese azoospermic patients including 2 obstructive azoospermia (OA group) and 5 non-obstructive azoospermia (NOA group) were analyzed. Immunofluorescence staining was performed to categorize early stage cells at meiosis prophase and to analyze chromosome pairing and recombination of pachytene spermatocyte.

[Effect of double activation on the development of frozen-thawed oocytes after intracytoplasmic sperm injection].

Objective: To investigate the influence on developmental potential of frozen-thawed rabbit oocytes with double assisted activation followed by intracytoplasmic sperm injection (ICSI).

Methods: A total of rabbit oocytes were collected and thawed after vitrification cryopreservation. Among all oocytes were cultured for 1 hour followed by ICSI.

[Effect of culture time on the spindle and chromosome configurations of human thawed oocytes with slow-cooling and raid-thawing protocol].

Objective: To examine the metaphase II spindle and chromosome configurations of human oocytes cultured for different times after thawing.

Methods: Using slow-cooling and raid-thawing protocol combined with 0.3 mol/L sucrose and 1.