Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 3 de 3
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Nat Commun ; 15(1): 549, 2024 Jan 23.
Artigo em Inglês | MEDLINE | ID: mdl-38263406

RESUMO

Temperature is a fundamental driver of species distribution and ecosystem functioning. Yet, our knowledge of the microclimatic conditions experienced by organisms inside tropical forests remains limited. This is because ecological studies often rely on coarse-gridded temperature estimates representing the conditions at 2 m height in an open-air environment (i.e., macroclimate). In this study, we present a high-resolution pantropical estimate of near-ground (15 cm above the surface) temperatures inside forests. We quantify diurnal and seasonal variability, thus revealing both spatial and temporal microclimate patterns. We find that on average, understory near-ground temperatures are 1.6 °C cooler than the open-air temperatures. The diurnal temperature range is on average 1.7 °C lower inside the forests, in comparison to open-air conditions. More importantly, we demonstrate a substantial spatial variability in the microclimate characteristics of tropical forests. This variability is regulated by a combination of large-scale climate conditions, vegetation structure and topography, and hence could not be captured by existing macroclimate grids. Our results thus contribute to quantifying the actual thermal ranges experienced by organisms inside tropical forests and provide new insights into how these limits may be affected by climate change and ecosystem disturbances.


Assuntos
Ecossistema , Florestas , Temperatura , Mudança Climática , Sistemas Computacionais
2.
Oxf Med Case Reports ; 2022(12): omac131, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36540840

RESUMO

Urethral polyps are one of the rare deformities of the urethra. In most cases, the urethral polyps would not be considered in the differential diagnosis process by a huge number of physicians, mainly owing to the rarity of documented cases in the medical literature and because of the wide variety of unspecified symptoms the urethral polyp might demonstrate. Urethral polyps are more common in males than in females, and they are usually diagnosed at an early age. Treatment options include transurethral resection, endoscopic suprapubic approach and open surgery. The disease prognosis is excellent as it does not usually recur after being completely removed and the risk of malignant transformation is very low. We are going to report a case of a 3-month-old boy who presented with bilateral vesicoureteral reflux and hydronephrosis, which revealed the presence of a large posterior urethral polyp.

3.
J Cosmet Laser Ther ; 19(7): 418-421, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28657379

RESUMO

BACKGROUND: PWS is a vascular malformation presented at birth and associated with a psychological problem to the patients. Many types of laser systems were used to solve this problem. AIM OF THE STUDY: To assess the efficacy of long-pulsed Nd:YAG 532-nm laser in the treatment of port wine stain both clinically and by imaging technique. PATIENTS AND METHODS: This is an interventional therapeutic clinical study for the treatment of facial port-twine stain with long-pulsed, 532-nm, Nd:YAG laser. The treatment sessions were done every 4 weeks for 12 sessions and follow-up after 3 months of the last session. The assessment of the response was done before and at the end of follow-up period, both objectively (percent of improvement, photo comparison by using PSNR) and subjectively (patient satisfaction). RESULTS: Sixteen patients completed all sessions of the treatment. The improvement score for the PWS were failure = 0%, mild = 6.25%, moderate = 12.5%, good = 31.25%, and excellent = 50%. The values of PSNR for all the patients have been recorded and were fewer than 25 which means that the response for the treated lesions was very good. CONCLUSION: The long-pulsed Nd:YAG laser 532 nm is an effective and safe method of treatment of facial PWSs without significant residue. The PSNR was a new, simple, cheap and noninvasive method for assessment of the response of PWSs to laser therapy.


Assuntos
Processamento de Imagem Assistida por Computador/métodos , Lasers de Estado Sólido/uso terapêutico , Terapia com Luz de Baixa Intensidade/métodos , Mancha Vinho do Porto/diagnóstico por imagem , Mancha Vinho do Porto/radioterapia , Razão Sinal-Ruído , Adolescente , Adulto , Criança , Face , Feminino , Seguimentos , Humanos , Lasers de Estado Sólido/efeitos adversos , Terapia com Luz de Baixa Intensidade/efeitos adversos , Masculino , Pessoa de Meia-Idade , Fotografação , Resultado do Tratamento , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...