PURPOSE The goal of this study was to evaluate microbiota and radiographic peri-implant bone loss associated with ligature-induced peri-implantitis. MATERIALS AND METHODS Thirty-six dental implants with 4 different surfaces (9 commercially pure titanium, 9 titanium plasma-sprayed, 9 hydroxyapatite, and 9 acid-etched) were placed in the edentulous mandibles of 6 dogs. After 3 months with optim...

We model two aspects of executives in parliamentary democracies: Decision-making authority is assigned to individuals, and private information is aggregated through communication. When information is relevant to all policies and communication is private, all decisions should be centralized to a single politician. A government that holds cabinet meetings, where information is made available to a...

The spectrum of quasar 0014+813 was the first in which deuterium was claimed to be observed, at first as a probable detection, and later " confirmed ". It is important because it is the only case in which there is a serious likelihood of a high D/H ratio, since the others are more ambiguous and admit a wide range of D/H including zero. We present new high-resolution spectra with higher quality ...

Peroxynitrite is a potent oxidant formed by the rapid reaction of the free radicals nitric oxide (NO) and superoxide. It causes airway hyperresponsiveness and airway epithelial damage, enhances inflammatory cell recruitment, and inhibits pulmonary surfactant. Asthma is characterized by increased airway hyperresponsiveness, airway epithelial shedding, and inflammation. We examined the production...

Thyroxine (T4) is a prohormone and must be activated to 3,5,3 -triiodothyronine (T3) by either type 1 (D1) or type 2 (D2) selenodeiodinase. A third deiodinase (D3) inactivates T3 or T4 by removal of an inner ring iodine. These reactions require both a deiodinase enzyme and a cofactor, probably a thiol, to reduce the oxidized selenolyl group in the active center of each deiodinase. Thus, deiodin...

Six experiments explored Parisian F rench-learning infants' ability to segment bisyllabic words from uent speech. T he rst goal was to assess whether bisyllabic word segmentation emerges later in infants acquiring European French compared to other languages. T he second goal was to determine whether infants learning di erent dialects of the same language have partly di erent segmentation abilit...

Autistic disorder is a complex genetic disease. Because of previous reports of individuals with autistic disorder with duplications of the Prader-Willi/Angelman syndrome critical region, we screened several markers across the 15q11-13 region, for linkage disequilibrium. One hundred forty families, consisting predominantly of a child with autistic disorder and both parents, were studied. Genotyp...