A lower bound for set-coloring Ramsey numbers.

The set-coloring Ramsey number is defined to be the minimum such that if each edge of the complete graph is assigned a set of colors from , then one of the colors contains a monochromatic clique of size . The case is the usual -color Ramsey number, and the case was studied by Erdős, Hajnal and Rado in 1965, and by Erdős and Szemerédi in 1972. The first significant results for general were obtained only recently, by Conlon, Fox, He, Mubayi, Suk and Verstraëte, who showed that if is bounded away from 0 and 1.

Diagnosis and Endoscopic Treatment of Hemobilia Due to Biliary Angiodysplasia: A Case Report and Literature Review.

Hemobilia is described as bleeding from the intra- or extrahepatic biliary tree expressed through the major duodenal papilla into the duodenum, with angiodysplasia of the major biliary duct as a rare etiological factor with few cases reported in the literature. Cholangioscopy plays a pivotal role in diagnosing and making therapeutic decisions regarding biliary tract lesions. We report a case of the diagnosis and treatment of hemobilia secondary to bleeding from angiodysplasia of the major biliary duct, which was resolved after the placement of a fully covered metallic stent, with a review of the literature.

Clinical and Radiological Profiles of COVID-19 Patients with Neurological Symptomatology: A Comparative Study.

Patients with COVID-19 can require radiological examination, with chest CT being more frequent than neuro-imaging. The objective is to identify epidemiological, clinical and radiological factors considered as predictors of neurological involvement in patients with COVID-19 assessed by neuroimaging and to describe the neuroimaging findings. This retrospective study was performed with 232 consecutive confirmed COVID-19 patients, from two radiological units, which were divided into two groups: (1) those who underwent a brain CT/MRI scan (n = 35) versus (2) those who did not undergo the brain CT/MRI scan, but underwent only chest CT ( = 197).

Electromyographic analysis of masseter muscle in newborns during suction in breast, bottle or cup feeding.

Background: When breastfeeding is difficult or impossible during the neonatal period, an analysis of muscle activity can help determine the best method for substituting it to promote the child's development. The aim of this study was to analyze the electrical activity of the masseter muscle using surface electromyography during suction in term newborns by comparing breastfeeding, bottle and cup feeding.

Methods: An observational, cross-sectional analytical study was carried out on healthy, clinically stable term infants, assigned to receive either breast, or bottle or cup feeding.

Profile of international air passengers intercepted with illegal animal products in baggage at Guarulhos and Galeão airports in Brazil.

Protection against biological material entering a country or region through airports is important because, through them, infectious agents can quickly reach exotic destinations and be disseminated. Illegal products of animal origin may contain hazardous infectious agents that can compromise animal and public health. The aim of this study was to identify associations between possession of illegal animal products in baggage and demographic characteristics of the passengers, as well as characteristics of their travel plans in the two main Brazilian international airports.