ABSTRACT
The general-relativistic phenomenon of spin-induced orbital precession has not yet been observed in strong-field gravity. Gravitational-wave observations of binary black holes (BBHs) are prime candidates, as we expect the astrophysical binary population to contain precessing binaries1,2. Imprints of precession have been investigated in several signals3-5, but no definitive identification of orbital precession has been reported in any of the 84 BBH observations so far5-7 by the Advanced LIGO and Virgo detectors8,9. Here we report the measurement of strong-field precession in the LIGO-Virgo-Kagra gravitational-wave signal GW200129. The binary's orbit precesses at a rate ten orders of magnitude faster than previous weak-field measurements from binary pulsars10-13. We also find that the primary black hole is probably highly spinning. According to current binary population estimates, a GW200129-like signal is extremely unlikely, and therefore presents a direct challenge to many current binary-formation models.
ABSTRACT
Abstract Gastrointestinal helminths are considered to be the most common parasites affecting cats worldwide. Correct diagnosis of these parasites in animals living in urban areas is pivotal, especially considering the zoonotic potential of some species (e.g. Ancylostoma sp. and Toxocara sp.). In this study, a copromicroscopic survey was conducted using fecal samples (n = 173) from domestic cats living in the northeastern region of Brazil. Samples were examined through the FLOTAC technique and the overall results showed positivity of 65.31% (113/173) among the samples analyzed. Coinfections were observed in 46.01% (52/113) of the positive samples. The most common parasites detected were Ancylostoma sp., Toxocara cati, Strongyloides stercoralis, Trichuris sp., Dipylidium caninum and Cystoisospora sp. From an epidemiological point of view, these findings are important, especially considering that zoonotic parasites (e.g. Ancylostoma sp. and Toxocara sp.) were the nematodes most frequently diagnosed in this study. Therefore, the human population living in close contact with cats is at risk of infection caused by the zoonotic helminths of these animals. In addition, for the first time the FLOTAC has been used to diagnosing gastrointestinal parasites of cats in Brazil.
Resumo Helmintos gastrointestinais são considerados os mais frequentes parasitos que afetam gatos em todo o mundo. O correto diagnóstico desses parasitos, em animais que vivem em áreas urbanas, é crucial, especialmente quando considerado o potencial zoonótico de algumas espécies (ex. Ancylostoma sp. e Toxocara sp.). Neste estudo, uma pesquisa coproparasitológica foi realizada, utilizando-se amostras de fezes (n = 173) de gatos domésticos da região Nordeste do Brasil. As amostras foram examinadas através da técnica FLOTAC, e os resultados gerais mostraram uma positividade de 65,31% (113/173). Co-infecções foram observadas em 46,01% (52/113) das amostras positivas. Os parasitas mais comuns aqui detectados foram Ancylostoma sp., Toxocara cati, Strongyloides stercoralis, Trichuris sp., Dipylidium caninum e Cystoisospora sp. De um ponto de vista epidemiológico, esses resultados são importantes, especialmente considerando que os parasitos zoonóticos (ex. Ancylostoma sp. e Toxocara sp.) foram os mais frequentes nematódeos diagnosticados neste estudo. Portanto, a população humana, em estreito convívio com esses animais, apresenta risco de infecção por helmintos de caráter zoonótico. Além disso, pela primeira vez, a técnica de FLOTAC tem sido utilizada no diagnóstico de parasitos gastrointestinais em gatos no Brasil.
Subject(s)
Animals , Cat Diseases/parasitology , Toxocariasis/parasitology , Feces/parasitology , Helminthiasis, Animal/parasitology , Intestinal Diseases, Parasitic/veterinary , Toxocara , Brazil , Helminths , Intestinal Diseases, Parasitic/parasitologyABSTRACT
Gastrointestinal helminths are considered to be the most common parasites affecting cats worldwide. Correct diagnosis of these parasites in animals living in urban areas is pivotal, especially considering the zoonotic potential of some species (e.g. Ancylostoma sp. and Toxocara sp.). In this study, a copromicroscopic survey was conducted using fecal samples (n = 173) from domestic cats living in the northeastern region of Brazil. Samples were examined through the FLOTAC technique and the overall results showed positivity of 65.31% (113/173) among the samples analyzed. Coinfections were observed in 46.01% (52/113) of the positive samples. The most common parasites detected were Ancylostoma sp., Toxocara cati, Strongyloides stercoralis, Trichuris sp., Dipylidium caninum and Cystoisospora sp. From an epidemiological point of view, these findings are important, especially considering that zoonotic parasites (e.g. Ancylostoma sp. and Toxocara sp.) were the nematodes most frequently diagnosed in this study. Therefore, the human population living in close contact with cats is at risk of infection caused by the zoonotic helminths of these animals. In addition, for the first time the FLOTAC has been used to diagnosing gastrointestinal parasites of cats in Brazil.
Subject(s)
Cat Diseases/parasitology , Feces/parasitology , Helminthiasis, Animal/parasitology , Intestinal Diseases, Parasitic/veterinary , Toxocariasis/parasitology , Animals , Brazil , Cats , Helminths , Intestinal Diseases, Parasitic/parasitology , ToxocaraABSTRACT
A modified sol-gel process for synthesizing nanocrystalline hydroxyapatite powders (nHA) for biomedical applications, using tetrahydrated calcium nitrate [Ca(NO(3))(2)â4H(2)O] and phosphorous pentoxide [P(2)O(5)] as precursor, is presented and discussed. The powders were washed and heat-treated at different temperatures and then characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The total process time reached with this modified process was less than 16 h. The results showed that there was an increment in size of the HA nanocrystals (nHA) when treated at different temperatures, ranging from 30 nm for the sample treated at 600°C to 500 nm for the sample heat-treated at 1,200°C.
Subject(s)
Biocompatible Materials/chemical synthesis , Hydroxyapatites/chemical synthesis , Nanoparticles/chemistry , Calcium Compounds/chemistry , Colloids/chemistry , Crystallization , Materials Testing , Microscopy, Electron, Scanning , Microscopy, Electron, Transmission , Nanostructures/chemistry , Nitrates/chemistry , Phase Transition , Phosphorus Compounds/chemistry , Powders , Solvents/chemistry , Temperature , Time Factors , X-Ray DiffractionABSTRACT
Os autores apresentam um caso de descolamento traumático da epífise proximal do rádio, diagnosticado 5 meses após luxação posterior do cotovelo, em uma criança com 9 anos de idade. Foi realizado redução e fixação da epífise avascular na metáfise proximal do rádio e, após 24 meses de seguimento, esta epífise encontrava-se revascularizada e o cotovelo apresentava flexão de 0-130 graus, pronação de 80 graus e supinação de 30 graus.
Subject(s)
Humans , Female , Child , Epiphyses, Slipped/diagnosis , Epiphyses, Slipped/rehabilitation , Radius/physiopathologyABSTRACT
Os autores apresentam e discutem os resultados do tratamento de 12 fraturas homolaterais do quadril e da diáfise do fêmur com duas placasou placa associada a parafusos. As 12 fraturas diafisárias ocorreram simultaneamente com cinco fraturas do colo e sete fraturas transtrocanterianas; em duas destas últimas o diagnóstico foi realizado tardiamente. Os resultados foram classificados segundo os critérios de Thoresen et al. em excelentes (quatro casos), bons (cinco), regulares (dois) e ruim (um).
