The tooth root transmits and balances occlusal forces through the periodontium to the alveolar bone. The periodontium, including the gingiva, the periodontal ligament, the cementum and the partial alveolar bone, derives from the dental follicle (DF), except for the gingiva. In the early developmental stages, the DF surrounds the tooth germ as a sphere and functions to promote tooth eruption. Ho...

Dermatofibroma (DF) is a common benign cutaneous tumor with many variants based on alterations in the morphology and composition of its diverse elements. One very infrequent type is sclerotic fibroma-like DF (SF-DF). We report 7 new cases of SF-DF. In addition, their main clinicopathological and immunohistochemical features were compared with 14 unselected common DFs and with 3 sclerotic fibrom...

BACKGROUND Sperm DNA damage shows great promise as a biomarker of infertility. The study aim is to determine the usefulness of DNA fragmentation (DF), including modified bases (MB), to predict assisted reproduction treatment (ART) outcomes. METHODS DF in 360 couples (230 IVF and 130 ICSI) was measured by the alkaline Comet assay in semen and in sperm following density gradient centrifugation ...

Dietary fiber (DF) has important health benefits in childhood, especially in promoting normal laxation. Studies also uggest that DF in childhood may be useful in preventing and treating obesity and also in lowering blood cholesterol levels, oth of which may help reduce the risk of future cardiovascular disease. In adults, a high-fiber, low-fat diet has been linked to educed rates of colon and o...

Depth-first proof-number search (df-pn) is powerful AND/OR tree search to solve positions in games. However, df-pn has a notorious problem of infinite loops when applied to domains with repetitions. Df-pn(r) cures it by ignoring proof and disproof numbers that may lead to infinite loops. This paper points out that df-pn(r) has a serious issue of underestimating proof and disproof numbers, while...

Clinical use of the nonsteroidal anti-inflammatory drug diclofenac (DF) is associated with an incidence of idiosyncratic hepatoxicity. The formation of reactive metabolites of DF in vivo has been proposed to be responsible for such toxicity. One type of reactive metabolite, a benzoquinone imine of DF formed through oxidation by cytochromes P450, can be trapped by glutathione in vitro in liver m...

SíNDROME DAS PERNAS INquIETAS ASSOCIADA A INSufICIêNCIA CARDíACA E AGRAVADA APóS TROCA VALVuLAR: MALDIçãO DE VéSPER? MD, MSc, PhD, Neurologist, Sleep Disorders Center, Hospital Universitário de Brasília, University of Brasília, Brasília DF, Brazil; MD, PulmonologistSleep Disorders Center, Hospital Universitário de Brasília, University of Brasília, Brasília DF, Brazil; 3 Medicine Student, Univer...

OBJECTIVES The aim of this study was to determine the effects of circumferential pulmonary vein ablation (CPVA) and electrogram-guided ablation (EGA) on the spectral characteristics of atrial fibrillation (AF) and the relationship between changes in dominant frequency (DF) and clinical outcome. BACKGROUND Circumferential pulmonary vein ablation and EGA have been used to eliminate AF. Spectral...

Face data have found increasingly widespread applications in daily life. To efficiently and accurately extract face information from input images, this paper presents a DF-Net-based detection approach. A lightweight facial feature extraction neural network based on the MobileNet-v2 architecture is designed implemented. By incorporating multi-scale fusion spatial pyramid modules, system achieves...