A large proportion of human tumor-derived cell lines and primary tumor cells show methionine-dependent growth. This phenomenon refers to the ability of cells to grow in media containing methionine and the inability of cells to grow in media supplemented with methionine's precursor, homocysteine (Hcy). Methionine can be formed by two different pathways, the recycling pathway and the salvage path...

in this study un-doped and eu-doped zno nanorods and microrads were fabricated by chemical vapor deposition (cvd) method. the effects of annealing, synthesis temperature and structure on structural and photoluminescence properties of eu-doped zno samples were studied in detail. prepared samples were characterized using x-ray diffraction (xrd), scanning electron microscopy (sem), particle size a...

Background & Objective: This study aimed to investigate the effect of decellularized allogeneic bone graft enriched by periosteal stem cells (PSCs) and growth factors on the bone repair process in a rabbit model, which could be used in many orthopedic procedures. Methods: In this experimental study, a critical size defect (CSD) (10 mm) was created in the ...

Genes regulate the development of fertilised egg into the inner cell mass (which will become the embryo, fetus and, eventually, baby) and the trophoblast (which will become the placenta). Defects in the genes that regulate these processes lead to a wide range of embryonic, fetal and neonatal defects, from minor cosmetic abnormalities, to such severe defects disasters that a pregnancy miscarries...

The chemical and electronic properties of surfaces to a large extent are controlled by defects. Defects facilitate the adsorption of gases and serve as reactive sites for chemical reactions. Furthermore, surface defects are a key to the nucleation, growth, and stability of metal clusters on metal oxide surfaces. This paper summarizes recent studies to assess the role of defects on Au cluster nu...

Silicon carbide is one of the most promising materials for power electronic devices capable of operating at extreme conditions. The widespread application of silicon carbide power devices is however limited by the presence of structural defects in silicon carbide epilayers. Our experiment demonstrates that optical second harmonic generation imaging represents a viable solution for characterizin...

Background Cleft palate (CP) is a common congenital defect. It makes serious difficulties for cleft-affected children. The gold standard of care is autogenous bone grafting which may cause additional problems in donor site along with disappointing results. Tissue engineering is a promising solution for a widespread range of defects and disorders. It is reasonable to utilize this novel technolo...

By the virtue of the nature of the vapor-liquid-solid (VLS) growth process in semiconductor nanowires (NWs) and their small size, the nucleation, propagation, and termination of stacking defects in NWs are dramatically different from that in thin films. We demonstrate germanium-silicon axial NW heterostructure growth by the VLS method with 100% composition modulation and use these structures as...

background and aims. a combination of guided tissue regeneration (gtr), bovine porous bone mineral (bpbm), and platelet rich plasma has been already applied for the regeneration of intrabony defects. the aim of this study was to determine the role of plasma rich in growth factor (prgf) alone in the periodontal regeneration of intrabony defects in humans as compared with bpbm/gtr technique. mate...

In the past In-line Inspection (ILI) was mainly done for the purpose of quickly finding defects that had to be repaired in order to restore the pipeline integrity. Currently this task shifts to a continuous monitoring of the pipeline's condition, which allows to derive new conclusions like the assessment of corrosion growth. The paper will discuss how defect growth can be estimated from continu...