Bulk layered transition metal dichalcogenides (TMDs) show diamagnetic properties. When exfoliated, the materials' band gap increases and changes from an indirect band gap to a direct one. During the exfoliation, the TMDs may undergo a phase transition from 2H to 1T polymorph, which is likely electronically driven and accompanied by a metal-insulator transition. A significantly higher efficiency...

Retention of primary teeth beyond the expected time exfoliation is uncommon; this condition known as persistence. A retained tooth, with crown in good condition, roots, and supporting alveolar bone can serve adults for many years. Aims- To determine prevalence investigate consequences their Materials Methods- ORTHOPANTAMOGRAM (OPG) data obtained from pediatric preventive dentistry 500 patients,...

Congenital adrenal hyperplasia (CAH) is an inherited autosomal recessive disorder characterized by insufficient production of cortisol. The aim of this case report was to present a child with CAH, premature exfoliation of primary teeth and accelerated eruption of his permanent teeth related to bone resorption. A 4.5-year-old Caucasian boy with CAH and long-term administration of glucocorticoids...

A calcium phosphate cement (CPC) sets to form hydroxyapatite and has been used in dental and craniofacial applications. However, when CPC was used in periodontal repair, tooth mobility resulted in the fracture and exfoliation of the brittle implants. The aim of this study was to develop CPC-chitosan lactate composites with higher strength and increased strain before failure. It was hypothesized...

We report on the first exfoliation of MoS2 coaxial nanotubes. The single-layer flakes, as the result of exfoliation, represent the transition metal dichalcogenides' analogue of graphene. They show a very low degree of restacking in comparison with exfoliation of MoS2 plate-like crystals. MoS2 monolayers were investigated by means of electron and atomic force microscopies, showing their structur...

Where a permanent anterior tooth cross bite results from over-retention o[ z~ primary incisor, a rapid correction method may prove successlrul. When the over-retained primary incisor is extracted, the permanent successor in cross bite is tipped into the extraction site, correcting the cross bite. Moyers defines a simple anterior tooth cross bite as a dental malocclusion resulting from the abnor...

F ollowing extraction of a natal or neonatal tooth, continued growth of the dental papilla may occur and a tooth-like form may develop.'^ This report describes an atypical tooth form (probably the result of continued growth of the retained dental papilla) that abscessed and may have caused delayed eruption of the adjacent primary lateral incisor. A 13-month-old white male presented to the autho...

A simple chemical route for the exfoliation of kaolinite in the presence of polymerizable ionic liquids and the resulting obtainment of exfoliated nanocomposites is reported. The exfoliation was achieved using three different ionic liquids structurally bearing a vinyl group: 1-methyl-3-(4-vinylbenzyl)imidazolium chloride salt (IL_1), 1-methyl-1-(4-vinylbenzyl)pyrrolidinium chloride (IL_2), and ...

The main advantage for applications of graphene and related 2D materials is that they can be produced on large scales by liquid phase exfoliation. The exfoliation process shall be considered as a particular fragmentation process, where the 2D character of the exfoliated objects will influence significantly fragmentation dynamics as compared to standard materials. Here, we used automatized image...

Objective: To report the prevalence of pseudo exfoliation in association with Cataract and other ocular diseases at a tertiary eye care centre in Sindh, Pakistan. Methodology: This was a hospital based study at Liaquat University Eye hospital, Hyderabad Sindh, Pakistan conducted from July, 2005 to November, 2006. A total of 1450 subjects of more than fifty years with senile cataract were regist...