Photosynthetic quantum efficiency in south‐eastern Amazonian trees may be already affected by climate change

Tropical forests are experiencing unprecedented high‐temperature conditions due to climate change that could limit their photosynthetic functions. We studied the high‐temperature sensitivity of photosynthesis in a rainforest site in southern Amazonia, where some of the highest temperatures and most rapid warming in the Tropics have been recorded. The quantum yield (F v /F m ) of photosystem II was measured in seven dominant tree species using leaf discs exposed to varying levels of heat stress. T 50 was calculated as the temperature at which F v /F m was half the maximum value. T 5 is defined as the breakpoint temperature, at which F v /F m decline was initiated. Leaf thermotolerance in the rapidly warming southern Amazonia was the highest recorded for forest tree species globally. T 50 and T 5 varied between species, with one mid‐storey species, Amaioua guianensis , exhibiting particularly high T 50 and T 5 values. While the T 50 values of the species sampled were several degrees above the maximum air temperatures experienced in southern Amazonia, the T 5 values of several species are now exceeded under present‐day maximum air temperatures

Mini-Almanaque: Comunicação Não Violenta para Profissionais de Saúde

Apresenta os métodos para Comunicação Não Violenta, com textos de definições, exemplos e curiosidades, intercalados com atividades

Comparação dos efeitos da estimulação elétrica nervosa transcutânea e da hidroterapia na dor, flexibilidade e qualidade de vida de pacientes com fibromialgia Comparison of transcutaneous electrical nerve stimulation and hydrotherapy effects on pain, flexibility and quality of life in patients with fibromyalgia

Este estudo visou comparar a eficácia da hidroterapia e da estimulação elétrica transcutânea do nervo (TENS) na melhora da sintomatologia de pacientes com fibromialgia Participaram do estudo 10 sujeitos com fibromialgia (48,8±9,8 anos) divididos em dois grupos: um tratado com hidroterapia e outro com TENS. Todos foram avaliados antes e após o tratamento quanto à flexibilidade (pelo índice terceiro dedo-solo), dor (por escala visual-analógica), qualidade de vida relacionada à saúde (pelos questionários SF-36 e Nottingham Health Profile - NHP) e tendência à depressão (pelo Inventário de Beck). Os dados foram tratados estatisticamente, com nível de significância fixado em p<0,05. O grupo TENS obteve melhora estatisticamente significante na intensidade da dor, na qualidade de vida medida pelo SF-36 e em alguns quesitos do NHP, enquanto a hidroterapia promoveu uma melhora na qualidade de vida medida pelo SF-36. Ambos os tratamentos foram assim eficazes ao melhorar o condicionamento físico, porém a TENS propiciou melhores resultados quanto à dor e em maior número das variáveis analisadas do que a hidroterapia, sugerindo ser mais eficaz no tratamento da fibromialgia.<br>The purpose of this study was to compare the effects of hydrotherapy and of transcutaneous electric nerve stimulation (TENS) on symptomology of patients with fibromyalgia. Ten subjects (aged 48.8±9.8 years) with fibromyalgia were divided into two groups, one treated with hydrotherapy, the other with TENS. All were evaluated before and after treatment as to flexibility (by means of the fingertip-to-floor test), pain (by visual analogue scale), health-related quality of life (by the SF-36 and the Nottingham Health Profile - NHP - questionnaires) and trend to depression (by the Beck's Depression Inventory). Data were statistically analysed, and significance level set at p<0.05. Results show that patients treated with TENS had significant pain reduction and better quality of life as measured by the SF-36 and some NHP items, while patients treated with hydrotherapy showed improvement in SF-36 scores. It may hence be said that both treatments were efficient in improving physical functioning, but TENS produced better results in relieving pain and in a greater number of variables, suggesting that it is more efficient for treating fibromyalgia