Effects of experimental fuel additions on fire intensity and severity: unexpected carbon resilience of a neotropical forest.

Global changes and associated droughts, heat waves, logging activities, and forest fragmentation may intensify fires in Amazonia by altering forest microclimate and fuel dynamics. To isolate the effects of fuel loads on fire behavior and fire-induced changes in forest carbon cycling, we manipulated fine fuel loads in a fire experiment located in southeast Amazonia. We predicted that a 50% increase in fine fuel loads would disproportionally increase fire intensity and severity (i.e., tree mortality and losses in carbon stocks) due to multiplicative effects of fine fuel loads on the rate of fire spread, fuel consumption, and burned area. The experiment followed a fully replicated randomized block design (N = 6) comprised of unburned control plots and burned plots that were treated with and without fine fuel additions. The fuel addition treatment significantly increased burned area (+22%) and consequently canopy openness (+10%), fine fuel combustion (+5%), and mortality of individuals ≥5 cm in diameter at breast height (dbh; +37%). Surprisingly, we observed nonsignificant effects of the fuel addition treatment on fireline intensity, and no significant differences among the three treatments for (i) mortality of large trees (≥30 cm dbh), (ii) aboveground forest carbon stocks, and (iii) soil respiration. It was also surprising that postfire tree growth and wood increment were higher in the burned plots treated with fuels than in the unburned control. These results suggest that (i) fine fuel load accumulation increases the likelihood of larger understory fires and (ii) single, low-intensity fires weakly influence carbon cycling of this primary neotropical forest, although delayed postfire mortality of large trees may lower carbon stocks over the long term. Overall, our findings indicate that increased fine fuel loads alone are unlikely to create threshold conditions for high-intensity, catastrophic fires during nondrought years.

Acute effects of radioiodine therapy on the voice and larynx of Basedow-Graves patients.

UNLABELLED: Graves's disease is the most common cause of hyperthyroidism. There are three current therapeutic options: anti-thyroid medication, surgery, and radioactive iodine (I 131). There are few data in the literature regarding the effects of radioiodine therapy on the larynx and voice. The aim and the AIM: os this study was: to assess the effect of radioiodine therapy on the voice of Basedow-Graves patients. MATERIAL AND METHOD: A prospective study was done. Following the diagnosis of Grave's disease, patients underwent investigation of their voice, measurement of maximum phonatory time (/a/) and the s/z ratio, fundamental frequency analysis (Praat software), laringoscopy and (perceptive-auditory) analysis in three different conditions: pre-treatment, 4 days, and 20 days post-radioiodine therapy. Conditions are based on the inflammatory pattern of thyroid tissue (Jones et al. 1999). RESULTS: No statistically significant differences were found in voice characteristics in these three conditions. CONCLUSION: Radioiodine therapy does not affect voice quality.

Mostra de estudos e pesquisas sobre voz da PUC-SP: análise de 2002 a 2010 / PUC-SP’S showcase of studies and research voice: 2002 to 2010’s analyses

Ao comemorar a marca de 100 dissertações defendidas na área de voz, no Programa de estudos Pós-Graduados em Fonoaudiologia, o Laborvox da PUC-SP promoveu a 9ª Mostra de Estudos e Pesquisas sobre Voz com o objetivo de realizar uma análise retrospectiva das produções e a reflexão sobre as perspectivas futuras.(AU)

In order to celebrate the 100th thesis in the area of voice, in the Program of Post Graduate studies in Speech Therapy, PUC-SP’s voice laboratory Laborvox promoted the 9th Showcase of Studies and Research on Voice focused on the retrospective analyses of the productions and reflection about future perspectives.(AU)

Al celebrar la marca de 100 disertaciones defendidas en el área de la voz, en el Programa de estudios Pos-Graduados en Fonoaudiologia, el Laborvox de la PUC-SP promovió la 9ª Muestra de Estudios y Investigaciones acerca de la Voz con el objetivo de realizar un análisis retrospectivo de las producciones e reflexionar sobre las perspectivas futuras.(AU)

Tuberculose laríngea: proposta de intervenção fonoaudiológica nas sequelas de voz após o tratamento farmacológico / Laryngeal tuberculosis: proposal of Speech-Language Pathology intervention in voice disorders following pharmacological treatment

A tuberculose é uma doença que esteve presente durante toda história. No século XIX o bacilo causador da doença foi descoberto e denominado bacilo de Koch. A tuberculose laríngea é uma das complicações da tuberculose pulmonar, e o sintoma mais comum é a rouquidão, decorrente ao processo cicatricial das lesões laríngeas. Sendo assim, o objetivo deste estudo foi verificar a efetividade da fonoterapia em um caso de disfonia pós-tratamento medicamentoso da tuberculose laríngea. A metodologia utilizada foi o estudo de caso do paciente J.O.B.S, 39 anos, gênero masculino, recepcionista de hotel, com jornada de oito diárias e ex-fumante, que trouxe como queixas principais rouquidão, cansaço e falta de ar durante a fala. Após as avaliações fonoaudiológica e otorrinolaringológica iniciaram-se as sessões de fonoterapia, com objetivo de diminuir a tensão à fonação, induzir o afastamento de pregas vestibulares, favorecer a mobilidade das pregas vocais, instaurar a respiração com apoio abdominal e melhorar a coordenação pneumofonoarticulatória. Após as 12 sessões previstas na metodologia desse estudo, diversos parâmetros vocais apresentaram melhoras, dentre eles a diminuição da tensão à fonação, respiração com apoio abdominal, melhoria da coordenação pneumofonoarticulatória, aumento da loudness e diminuição do ataque vocal brusco, que refletiram em uma emissão com menor esforço e mais aceita socialmente. A terapia fonoaudiológica, apesar das limitações decorrentes aos processos cicatriciais das lesões, mostrou-se importante no caso apresentado e o paciente ficou satisfeito com os resultados obtidos, os quais refletiram de forma positiva na comunicação oral e no convívio social do paciente.

Tuberculosis is a disease that has been present throughout history. In the XIX century the agent that causes the disease was discovered and named mycobacterium tuberculosis. Laryngeal tuberculosis is one of the possible complications from pulmonary tuberculosis, and the most common symptom is hoarseness, as a result of the healing process of ulcerative laryngeal lesions. The purpose of this study was to verify the effectiveness of speech-language therapy in a case of voice disorder following anti-tuberculosis drug treatment. The methodology used was the case study of the patient J.O.B.S, 39 years old, male, hotel receptionist with an eight-hour workday, former smoker, who had hoarseness, tiredness and dyspnea during speech as main complaints. Speech-language therapy sessions started after Speech-Language Pathology and otolaryngological evaluations, with the aims to reduce the laryngeal tension during phonation, induce supraglottic vocal fold separation, help the smooth movement of the vocal folds, install abdominal breathing, and improve pneumophonic coordination. After 12 sessions, several vocal parameters improved, including decrease of vocal tension during speech, use of abdominal breathing, improvement of pneumophonic coordination, loudness increase, and reduction of the abrupt vocal attack, which reflected in vocal emissions with less effort and more socially accepted. In spite of the limitations caused by the healing of the ulcerative lesions, speech-language therapy was important in this case study, and the patient was satisfied with the results obtained, which had positive influences on his oral communication and social life.

Efeitos agudos laringológicos e vocais da radioiodoterapia em pacientes com hipertireoidismo por doença de Basedow Graves / Acute effects of radioiodine therapy on the voice and larynx of Basedow-Graves patients

A Doença de Graves constitui a forma mais comum de hipertireoidismo e três abordagens terapêuticas são atualmente utilizadas: uso de medicamentos antitireoideanos, cirurgia e iodo radioativo (I 131). Os efeitos do o I 131 e a indução precoce de hipotireoidismo são conseqüências da destruição induzida do I131 sobre o parênquima tireoideano. São poucos relatos encontrados na literatura acerca dos efeitos da radioioterapia sobre a laringe e conseqüentemente na produção vocal. OBJETIVO: Avaliar os efeitos agudos sobre a voz da radioiodoterapia em pacientes com hipertireoidismo por Doença de Basedow Graves. MATERIAL E MÉTODO: Estudo de corte contemporâneo longitudinal, prospectivo. Procedimentos: Investigação vocal, mensuração do tempo máximo fonatório de /a/ e relação s/z, análise freqüência fundamental (Software Praat), laringoscopia e análise perceptivo-auditiva em três momentos: pré-dose, 4 dias e 20 dias pós dose. Momentos baseados no perfil inflamatório do tecido tireoideano. RESULTADOS: Não houve mudanças estatisticamente significantes nos aspectos vocais e laringológicos nos três momentos avaliados. CONCLUSÃO: A radioiodoterapia não afeta a qualidade vocal.

Graves's disease is the most common cause of hyperthyroidism. There are three current therapeutic options: anti-thyroid medication, surgery, and radioactive iodine (I 131). There are few data in the literature regarding the effects of radioiodine therapy on the larynx and voice. The aim and the AIM: os this study was: to assess the effect of radioiodine therapy on the voice of Basedow-Graves patients. MATERIAL AND METHOD: A prospective study was done. Following the diagnosis of Grave's disease, patients underwent investigation of their voice, measurement of maximum phonatory time (/a/) and the s/z ratio, fundamental frequency analysis (Praat software), laringoscopy and (perceptive-auditory) analysis in three different conditions: pre-treatment, 4 days, and 20 days post-radioiodine therapy. Conditions are based on the inflammatory pattern of thyroid tissue (Jones et al. 1999). RESULTS: No statistically significant differences were found in voice characteristics in these three conditions. CONCLUSION: Radioiodine therapy does not affect voice quality.

Caracterização vocal de pacientes com hipertireoidismo e hipotireoidismo / Vocal characterization of patients with hyperthyroidism and hypothyroidism

OBJETIVO: Caracterizar a qualidade vocal, por meio de análise computadorizada e perceptivo-auditiva, de pacientes com hipertireoidismo (grupo A) e hipotireoidismo (grupo B). MÉTODOS: Vinte mulheres não fumantes, com idades entre 18 e 55 anos, atendidas no Ambulatório de Endocrinologia da instituição, foram avaliadas após o diagnóstico clínico e laboratorial de hipertireoidismo ou hipotireoidismo. Os parâmetros investigados foram: tempo da doença, presença de queixa vocal, tempos máximos de fonação /a/, /s/ e /z/, freqüência fundamental (F0), ruído glótico (GNE). Os aspectos avaliados na análise perceptivo-auditiva, foram: coordenação pneumo-fonoarticulatória (coordenada ou incoordenada), pitch, loudness, ataque vocal, ressonância, velocidade de fala e qualidade vocal, que poderia ter até duas das seguintes classificações: neutra, rouca, soprosa, áspera ou tensa, e grau: leve, moderado ou severo. Os dados foram tabulados e analisados estatisticamente através do programa EPI-INFO 6.04b, método qualitativo Fisher, com nível de significância menor do que 0.05. RESULTADOS: A análise perceptivo-auditiva mostrou que sete pacientes hipotireoideos e nove pacientes hipertireoideos apresentaram alteração na qualidade vocal. Oito pacientes em ambos os grupos apresentaram incoordenação pneumo-fonoarticulatória. Oito pacientes do grupo A e seis pacientes do grupo B referiam queixas vocais como rouquidão e voz grossa, respectivamente. Na análise acústica, nove pacientes apresentaram o ruído glótico alterado. CONCLUSÃO: Os resultados evidenciaram grande incidência de alteração vocal nos grupos estudados (grupos dos pacientes com hipertireoidismo e com hipotireoidismo), o que demonstra a relação entre disfonia e disfunções tireoideanas.

PURPOSE: To characterize the vocal quality of subjects with hyperthyroidism (group A), and hypothyroidism (group B) through a computer-aided and auditory-perceptive analysis. METHODS: Twenty non-smoking women with ages between 18 and 55 years from the Endocrinology Ambulatory of the institution were evaluated after clinical and lab diagnosis for hyperthyroidism or hypothyroidism. The parameters investigated were: period bearing the disease, vocal complaint, maximum phonation time /a/, /s/, and /z/, fundamental frequency (F0), glottal noise (GNE). The aspects evaluated in the auditory-perceptive analysis were: pneumo-phono-articulatory coordination (coordinated or uncoordinated), pitch, loudness, vocal attack, resonance, speech speed and vocal quality, that could be classified as one or two of the following: neutral, hoarse, whispered, coarse, or tense, and degree: light, moderate or severe. Data were statistically analyzed through the EPI-INFO 6.04b software, Fisher qualitative method, considering a significance level of 0.05. RESULTS: The auditory-perceptive analysis showed that seven patients with hypothyroidism and nine with hyperthyroidism presented changes in vocal quality. Eight subjects from both groups presented pneumo-phono-articulatory incoordination. Eight subjects from group A and six from group B referred vocal complaints, such as hoarseness and thick voice, respectively. In the acoustic analysis, nine subjects presented change in glottal noise. CONCLUSION: The results showed great incidence of vocal changes on the studied groups (both hyper and hypothyroidism groups), which evidences the relation between dysphonia and thyroidal dysfunctions.