Platinum dendrimer-encapsulated nanoparticles (DENs) containing an average of 55, 100, 147, 200, and 240 atoms were prepared within sixth-generation, hydroxyl-terminated, poly(amidoamine) dendrimers. These DENs were immobilized on glassy carbon electrodes, and the effect of particle size on the kinetics of the oxygen reduction reaction (ORR) was quantitatively evaluated using rotating disk volt...

Dens invaginatus (dens in dente) is a rare malformation with a widely varied morphology. An unusual presentation of a type III dens invaginatus affecting a conical shaped permanent lateral incisor in an 8-year-old female patient is reported. The presence of a pulp stone and a periapical radiolucency further added onto the complexity of the case. The etiology, pathophysiology, association with o...

Ileocolic invagination in the adult may be caused by adenocarcinoma and lead to intestinal obstruction. We report a case of a cecal adenocarcinoma that was complicated by an ileocolic invagination in a 38 year old female, diagnosed on a contrast enhanced CT scan of the abdomen and highlights the importance of contrast enhanced CT for diagnosis of ileocolic invagination.

A fundamental phenomenon in development is the capacity of sheets of cells to bend inward, thereby positioning some of the cells from these sheets below the surface on which they were originally placed. This process, known as invagination, generates folds or depressions in a previously uniform surface. Eventually, these groups of cells separate from their original neighbors and generate new int...

Effects of fragmentation on the ecology of organisms occupying dendritic ecological networks (DENs) have recently been described through both conceptual and mathematical models, but few hypotheses have been tested in complex, real-world ecosystems. Stream fishes provide a model system for assessing effects of fragmentation on the structure of communities occurring within DENs, including how fra...

Background: Invagination of appendicular stump during appendicectomy has traditionally been practiced by many surgeons despite lack of evidence to justify its benefit. This prospective randomized clinical study was conducted to evaluate, in our setting, the necessity of appendicular stump invagination during appendicectomy. Methods: A prospective randomized clinical study was conducted at Bugan...

Institute and personal experience (over 25 years) of basilar invagination was reviewed. The database of the department included 3300 patients with craniovertebral junction pathology from the year 1951 till date. Patients with basilar invagination were categorized into two groups based on the presence (Group A) or absence (Group B) of clinical and radiological evidence of instability of the cran...

Epithelial invagination is necessary for formation of many tubular organs, one of which is the Drosophila embryonic salivary gland. We show that actin reorganization and control of endocycle entry are crucial for normal invagination of the salivary placodes. Embryos mutant for Tec29, the Drosophila Tec family tyrosine kinase, showed delayed invagination of the salivary placodes. This invaginati...

T cell activation is driven by the TCR and complemented by costimulation. We have studied the dynamics of ligand-engagement of the costimulatory receptor CD2 in T cell/APC couples. Thousands of ligand-engaged CD2 molecules were included in a large T cell invagination at the center of the cellular interface within 1 min of cell couple formation. The structure and regulation of this invagination ...