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Pesquisa : G01.358.500.505.650.836 [Categoria DeCS]
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Id: biblio-1055114
Autor: Rocha, G. O; Chizzotti, F. H. M; Santos, M. E. R; Sousa, B. M. L; Fonseca, D. M.
Título: Perfilhamento do capim-piatã submetido a regimes de desfolhação intermitente / Tillering of piatã grass subject intermittent cutting
Fonte: Arq. bras. med. vet. zootec. (Online);71(6):2057-2064, Nov.-Dec. 2019. tab, graf.
Idioma: pt.
Resumo: Objetivou-se avaliar o perfilhamento da Brachiaria brizantha cv. Piatã, como base para identificação das frequências e alturas pós-corte mais adequadas para essa gramínea forrageira. Em um esquema fatorial 2 x 2, foram estudadas combinações entre duas frequências de corte (95% e máxima interceptação de luz, ILmax) e duas alturas pós-corte (15 e 20cm). O delineamento foi em blocos ao acaso, com três repetições, totalizando 12 unidades experimentais de 14m2 cada. Foram avaliadas as taxas de aparecimento (TApP) e de mortalidade (TMoP) de perfilhos, o índice de estabilidade (IE) e a densidade populacional de perfilhos. A maior TApP no dossel sob IL de 95% ocorreu no Verão 1, em comparação às demais épocas. Nos dosséis manejados com ILmax, a TApP foi superior no Verão 1 e no Outono, quando comparados às outras épocas. No Verão 1 e no Final da Primavera e Verão 2, houve as maiores TMoP para as duas frequências de corte avaliadas. No Outono, a TMoP também foi alta no dossel cortado com ILmáx. O IE foi menor durante o Verão 1 no dossel sob ILmax e com 15cm de resíduo (0,995). Porém, nas demais épocas, os valores de índice de estabilidade foram maiores que uma unidade e não foram influenciados pela frequência e altura pós-corte. A densidade populacional de perfilhos foi menor no Verão 1, em comparação às demais épocas. O capim-piatã pode ser desfolhado com qualquer combinação entre as interceptações de luz, 95% e ILmax, e alturas pós-corte, 15 ou 20cm, sem prejudicar a persistência do pasto.(AU)

The aim of this study was to evaluate the tillering of Brachiaria brizantha cv. Piatã, as a basis for identifying the frequencies and post-cutting heights most suitable for this grass. In a 2 x 2 factorial scheme, combinations between two cut frequencies (95% and maximum light interception, IL max ) and two post-cut heights (15 and 20cm) were studied. The experimental design was in randomized blocks with 3 replicates, totaling 12 experimental units of 14m 2 each. Rates of appearance (TAR) and mortality (TMR) of tillers, the stability index and the population density of tillers were evaluated. The highest TAR in the canopy under 95% IL occurred in Summer 1, in comparison to the other seasons. In the canopies managed with IL max , TAR was higher in summer 1 and in autumn, when compared to other seasons. In summer 1 and at the end of spring and summer 2, there were the highest TMR for the two cutoff frequencies evaluated. In autumn, TMR was also high in the canopy cut with IL max . IE was lower during summer 1 in the canopy under IL max and 15cm of residue (0.995). However, at other times, stability index values were greater than one unit and were not influenced by post-cut frequency and height. The population density of tillers was lower in Summer 1, when compared to the other seasons. The piata grass may be defoliated with any combination of light intercepts, 95% and ILmax, and post-cut heights, 15 or 20cm, without impairing the persistence of pasture.(AU)
Descritores: Luz Solar
Fenômenos Fisiológicos Vegetais
Brachiaria/crescimento & desenvolvimento
Responsável: BR68.1 - Biblioteca Virginie Buff D'Ápice


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Id: biblio-1096381
Autor: Martínez Piva, María Manuela; Quintero Viana, María Carolina; Enz, Paula Andrea; Bollea Garlatti, María Luz; Mazzuoccolo, Luis Daniel.
Título: Llega la primavera y florecen los eritemas polimorfos solares / Spring arrives and with it the polymorphous light eruption
Fonte: Rev. Hosp. Ital. B. Aires (2004);37(4):157-159, dic. 2017. ilus.
Idioma: es.
Resumo: El eritema polimorfo solar es la fotodermatosis más frecuente y suele aparecer en primavera con la primera exposición intensa al sol. Sus manifestaciones cutáneas son variadas y el diagnóstico se basa en la clínica junto al antecedente de exposición solar. En los casos leves, la fotoprotección suele ser suficiente para el control de la enfermedad, pero en formas más graves se requieren otras terapéuticas, como corticoides, antihistamínicos, o fototerapia, que genera una "fotoadaptación" de las áreas de piel afectadas. Presentamos un caso típico de erupción polimorfa solar que respondió de forma adecuada a medidas de fotoprotección. (AU)

The polymorphic solar eruption is the most frequent photodermatosis, and usually appears in spring with the first intense exposure to the sun. It has multiple cutaneous manifestations, and its diagnosis is based on the clinic and the antecedent of solar exposition. In mild cases, photoprotection is usually enough to control the disease, but in more severe forms, other therapies are required, such as corticosteroids, antihistamines, or phototherapy to generate a "photo-adaptation" of the affected skin areas. We present a typical case of polymorphic solar eruption that responded adequately to photoprotection measurements. (AU)
Descritores: Transtornos de Fotossensibilidade/diagnóstico
Luz Solar/efeitos adversos
Eritema/diagnóstico
-Fototerapia
Transtornos de Fotossensibilidade/imunologia
Transtornos de Fotossensibilidade/patologia
Qualidade de Vida
Estações do Ano
Protetores Solares/uso terapêutico
Azatioprina/uso terapêutico
Talidomida/uso terapêutico
Raios Ultravioleta/efeitos adversos
Terapia Ultravioleta
Corticosteroides/uso terapêutico
Colecalciferol/uso terapêutico
Eritema/etiologia
Eritema/imunologia
Eritema/patologia
Antagonistas dos Receptores Histamínicos/uso terapêutico
Antimaláricos/uso terapêutico
Limites: Humanos
Feminino
Adulto
Tipo de Publ: Relatos de Casos
Responsável: AR2.1 - Biblioteca Central


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Id: biblio-899396
Autor: Aguglia, Andrea; Borsotti, Antonio; Maina, Giuseppe.
Título: Bipolar disorders: is there an influence of seasonality or photoperiod?
Fonte: Rev. bras. psiquiatr;40(1):6-11, Jan.-Mar. 2018. tab, graf.
Idioma: en.
Resumo: Objective: To increase understanding of the influence of photoperiod variation in patients with bipolar disorders. Methods: We followed a sample of Italian bipolar patients over a period of 24 months, focusing on inpatients. All patients admitted to the Psychiatric Inpatient Unit of San Luigi Gonzaga Hospital in Orbassano (Turin, Italy) between September 1, 2013 and August 31, 2015 were recruited. Sociodemographic and clinical data were collected. Results: Seven hundred and thirty patients were included. The admission rate for bipolar patients was significantly higher during May, June and July, when there was maximum sunlight exposure, although no seasonal pattern was found. Patients with (hypo)manic episodes were admitted more frequently during the spring and during longer photoperiods than those with major depressive episodes. Conclusions: Photoperiod is a key element in bipolar disorder, not only as an environmental factor but also as an important clinical parameter that should be considered during treatment.
Descritores: Estações do Ano
Luz Solar/efeitos adversos
Transtorno Bipolar/etiologia
Transtorno Bipolar/psicologia
Fotoperíodo
-Fatores Socioeconômicos
Fatores Sexuais
Transtorno Depressivo Maior
Hospitalização/estatística & dados numéricos
Itália
Transtornos Mentais/classificação
Transtornos Mentais/etiologia
Transtornos Mentais/psicologia
Limites: Humanos
Masculino
Feminino
Adulto
Responsável: BR1.1 - BIREME


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Id: biblio-887026
Autor: Torraca, Pedro de Freitas Silva; Murback, Nathalia Dias Negrão; Wiziack, Nayara de Castro; Freitas, Tânia Christina Marchesi de; França, Greicy Mara.
Título: Segmental lichen aureus: an uncommon presentation
Fonte: An. bras. dermatol;92(5):704-706, Sept.-Oct. 2017. graf.
Idioma: en.
Resumo: Abstract: Pigmented purpuric dermatoses are chronic vascular inflammatory conditions characterized by the presence of pigmented macules. Among its different presentations, lichen aureus is distinguished by the lichenoid conformation of its plaques and the predilection for lower limb involvement. Its segmented form is rare and difficult to control, especially in cases of symptomatic lesions. We report a rare case of segmental lichen aureus with six years of evolution associated with light itching. We also discuss the main therapeutic approaches to control the disease.
Descritores: Erupções Liquenoides/patologia
-Luz Solar
Betametasona/uso terapêutico
Fármacos Fotossensibilizantes/uso terapêutico
Erupções Liquenoides/terapia
Glucocorticoides/uso terapêutico
Metoxaleno/uso terapêutico
Limites: Humanos
Feminino
Pessoa de Meia-Idade
Tipo de Publ: Relatos de Casos
Responsável: BR1.1 - BIREME


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Rombaldi, Airton José
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Id: biblio-887119
Autor: Rombaldi, Airton José; Canabarro, Lúcio Kerber; Neutzling, Marilda Borges; Silva, Marcelo Cozzensa da.
Título: Prevalence and factors associated with exposure to sunlight and sunscreen among physical education teachers in Pelotas, southern Brazil
Fonte: An. bras. dermatol;92(6):785-792, Nov.-Dec. 2017. tab, graf.
Idioma: en.
Resumo: Abstract: Background: Decreasing the time of exposure to the sun and increasing sunscreen use are important actions to prevent skin cancer. Objective: This study aimed to verify the prevalence of exposure to the sun and the use of sunscreen, as well as associated factors among physical education teachers of the basic education network from city of Pelotas, southern Brazil. Methods: A census type study was conducted with physical education teachers of the basic education network from Pelotas. This study assessed the time of exposure to the sun in the workplace for at least 20 min, between 10am and 4pm, and the use of sunscreen during the workday. Results: 188 teachers answered the questionnaire. The prevalence of exposure to the sun between 10:00am and 4:00pm was 89.2% (95% CI of 83.8% -93.3%), while sunscreen use was 63.3% (95% CI of 56.0% -70.2%). However, when the sample was stratified by sex, women reported a higher rate of sunscreen use (78.5% -95% CI of 72.2-84.3) than men (38.9% -95% CI of 31.8-46.2) (p<0.001). Teachers with longer work weeks were at greater risk of exposure to the sun. In addition, women, with normal weight and who worked less hours, were more likely to use sunscreen. Study limitations: Cross-sectional study and lack of information on the proper use and frequency of use of sunscreen. Conclusion: Physical education teachers were highly exposed to solar radiation, and less than two-thirds used sunscreen during the workday. Interventions with this professional group are necessary to reduce the risk of skin cancer.
Descritores: Educação Física e Treinamento
Luz Solar/efeitos adversos
Protetores Solares/uso terapêutico
Exposição Ocupacional/estatística & dados numéricos
-Neoplasias Cutâneas/prevenção & controle
Fatores de Tempo
Brasil/epidemiologia
Prevalência
Estudos Transversais
Análise Multivariada
Inquéritos e Questionários
Fatores de Risco
Distribuição por Sexo
Distribuição por Idade
Doenças Profissionais/prevenção & controle
Limites: Humanos
Masculino
Feminino
Adulto
Pessoa de Meia-Idade
Tipo de Publ: Estudo Observacional
Responsável: BR1.1 - BIREME


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Id: biblio-887115
Autor: Cuevas-Gonzalez, Juan Carlos; Vega-Memíje, María Elisa; Borges-Yáñez, Socorro Aída; Rodríguez-Lobato, Erika.
Título: Risk factors associated with actinic prurigo: a case control study
Fonte: An. bras. dermatol;92(6):774-778, Nov.-Dec. 2017. tab.
Idioma: en.
Resumo: Abstract: Background: Actinic prurigo (AP) is an idiopathic photodermatosis. Although its initial manifestations can appear in 6 to 8-year-old children, cases are diagnosed later, between the second and fourth decades of life, when the injuries are exacerbated. Objective: To identify risk factors associated with clinical manifestations of AP such as skin and mucosal lesions. Methods: Thirty patients with AP and 60 controls were included in the study, the dependent variable was the presence of skin or labial mucosal lesions, the independent variables were age, sex, solar exposure, living with pets or farm animals, exposure to wood smoke, smoking habit, years smoking, and hours spent per day and per week in contact with people who smoke. Results: Of the 30 diagnosed AP patients, 66.7% were female. Patients age ranged from 7 to 71 years and the mean age was 35.77 ± 14.55 years. We found significant differences with the age and cohabitation with farm animals. Those who lived with farm animals presented 14.31 times higher probability of developing AP (95% CI 3-78.06). Study limitations: This is a case-control study; therefore, a causal relationship cannot be proven, and these results cannot be generalized to every population. Conclusions: The identification of factors related to the development of AP increases our knowledge of its physiopathology. Moreover, identifying antigens that possibly trigger the allergic reaction will have preventive and therapeutic applications in populations at risk of AP.
Descritores: Transtornos de Fotossensibilidade/etiologia
Dermatopatias Genéticas/etiologia
Exposição Ambiental/efeitos adversos
-Transtornos de Fotossensibilidade/fisiopatologia
Dermatopatias Genéticas/fisiopatologia
Luz Solar/efeitos adversos
Fatores de Tempo
Estudos de Casos e Controles
Modelos Logísticos
Fatores de Risco
Fatores Etários
Estatísticas não Paramétricas
Hipersensibilidade/etiologia
Hipersensibilidade/fisiopatologia
Animais Domésticos
Limites: Humanos
Animais
Masculino
Feminino
Criança
Adolescente
Adulto
Pessoa de Meia-Idade
Idoso
Adulto Jovem
Responsável: BR1.1 - BIREME


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Id: biblio-887112
Autor: Silva, Mikaelly Batista da; Melo, Alanne Rayssa da Silva; Costa, Ludimila de Araújo; Barroso, Haline; Oliveira, Naila Francis Paulo de.
Título: Global and gene-specific DNA methylation and hydroxymethylation in human skin exposed and not exposed to sun radiation
Fonte: An. bras. dermatol;92(6):793-800, Nov.-Dec. 2017. tab, graf.
Idioma: en.
Resumo: Abstract: Background: epigenomes can be influenced by environmental factors leading to the development of diseases. Objective: To investigate the influence of sun exposure on global DNA methylation and hydroxymethylation status and at specific sites of the miR-9-1, miR-9-3 and MTHFR genes in skin samples of subjects with no history of skin diseases. Methods: Skin samples were obtained by punch on sun-exposed and sun-protected arm areas from 24 corpses of 16-89 years of age. Genomic DNA was extracted from skin samples that were ranked according to Fitzpatrick's criteria as light, moderate, and dark brown. Global DNA methylation and hydroxymethylation and DNA methylation analyses at specific sites were performed using ELISA and MSP, respectively. Results: No significant differences in global DNA methylation and hydroxymethylation levels were found among the skin areas, skin types, or age. However, gender-related differences were detected, where women showed higher methylation levels. Global DNA methylation levels were higher than hydroxymethylation levels, and the levels of these DNA modifications correlated in skin tissue. For specific sites, no differences among the areas were detected. Additional analyses showed no differences in the methylation status when age, gender, and skin type were considered; however, the methylation status of the miR-9-1 gene seems to be gender related. Study limitations: there was no separation of dermis and epidermis and low sample size. Conclusion: sun exposure does not induce changes in the DNA methylation and hydroxymethylation status or in miR-9-1, miR-9-3 and MTHFR genes for the studied skin types.
Descritores: Pele/efeitos da radiação
Dermatopatias/etiologia
Luz Solar/efeitos adversos
Metilação de DNA/genética
-Valores de Referência
Pele/química
Ensaio de Imunoadsorção Enzimática
Fatores Sexuais
Reação em Cadeia da Polimerase
Fatores Etários
Exposição à Radiação
MicroRNAs/genética
Metilenotetra-Hidrofolato Redutase (NADPH2)/genética
Epigenômica
Limites: Humanos
Masculino
Feminino
Adolescente
Adulto
Pessoa de Meia-Idade
Idoso
Adulto Jovem
Responsável: BR1.1 - BIREME


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Id: biblio-887161
Autor: Andreola, Gabriel Martinez; Carvalho, Vânia Oliveira de; Huczok, Janaina; Cat, Mônica Nunes Lima; Abagge, Kerstin Taniguchi.
Título: Photoprotection in adolescents: what they know and how they behave
Fonte: An. bras. dermatol;93(1):39-44, Jan.-Feb. 2018. tab, graf.
Idioma: en.
Resumo: Abstract: Background: The greatest sun exposure occurs until adolescence and this is the only factor involved in photocarcinogenesis subject to modification with photoprotection. Objective: The objective of this study was to evaluate the habits and knowledge of adolescents regarding photoprotection. Method: Cross-sectional study that included 512 students from primary and high school. Data were collected by questionnaires with questions about habits and knowledge on sun protection. For data analysis, Pearson's Chi-square test and Yates test were applied, with 5% level of significance. Results: We evaluated 512 students, with a mean age of 14 years old. The teenagers agreed that ultraviolet rays cause skin cancer and aging (96% and 70%, respectively). Knowledge about the occurrence of burns even on cloudy days was recorded in 68% of cases, as well as the need for photoprotection for sports in 72%. The source of information about sun protection were by parents in 55%. In 70% was observed previous occurrence of sunburn, the daily use of sunscreens was found in 15% and 67% used only at the beach. of sunscreens with SPF higher than 30 was reported by 70% of students and 57% reported going to the beach between 10h and 16h. In 68% of cases it was registered insufficient sun protection, attributed, in 57% of the time to forgetfulness. Study limitations: The sample refers to two schools of Curitiba (PR), Brazil. Conclusion: Teenagers know the risks of sun exposure, but they do not adopt the practices for adequate protection.
Descritores: Luz Solar/efeitos adversos
Protetores Solares/uso terapêutico
Conhecimentos, Atitudes e Prática em Saúde
Comportamento do Adolescente
Exposição Ambiental/efeitos adversos
-Queimadura Solar
Brasil
Estudos Transversais
Inquéritos e Questionários
Limites: Humanos
Masculino
Feminino
Adolescente
Responsável: BR1.1 - BIREME


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Id: biblio-983734
Autor: Pereira, Luiza Alonso; Luz, Flávio Barbosa; Carneiro, Clívia Maria Moraes de Oliveira; Xavier, Ana Lucia Rampazzo; Kanaan, Salim; Miot, Hélio Amante.
Título: Evaluation of vitamin D plasma levels after mild exposure to the sun with photoprotection
Fonte: An. bras. dermatol;94(1):56-61, Jan.-Feb. 2019. tab, graf.
Idioma: en.
Resumo: Abstract: Background: Most of the organism's vitamin D (VD) is obtained through the cutaneous synthesis after exposure to the sun's UVB radiation. Sunscreens are indicated for the prevention of actinic damage to the skin, however, there are few clinical trials assessing the synthesis of cutaneous VD in real-life situations of sun exposure with ordinary clothing and usual photoprotection. Objectives: To evaluate the synthesis of VD with suberythemal sun exposure in healthy adults using topical photoprotection (SPF 30). Methods: Quasi-experimental study, conducted at Rio de Janeiro (Brazil), during winter, with 95 healthy adults who had 25-OH-VD checked twice, 24 hours apart, and were exposed to the sun (UVB=20 mJ/cm2), according to a randomized grouping: SC - use of SPF 30 on the face, neck and chest (n=64), NO - no sunscreens (n=10), CO - confined from sun exposure for 24h (n=21). The groups were matched according to the propensity score related to gender, age, phototype, body mass index, glycosylated hemoglobin and baseline levels of VD. The outcome evaluated was the variation (ΔVD) in serum level of 25-OH-VD (ng/ml) between the groups. Results: A statistically significant difference was identified between CO and SC groups [median (p25-p75)]: ΔVD =1.4 (-0.3-3.6) vs. 5.5 (4.8-6.6); p<0.01. There was no difference between SC and NO groups: 5.4 (3.1-6.1) vs. 4.1 (2.5-6.0); p=0.17. Study limitations: Laboratory analysis technique (chemiluminescence) with great variability, loss of food intake standardatization, unbalanced groups. Conclusions: Suberythemal sun exposure with sunscreen (SPF 30) provides similar vitamin D serum variation than without photoprotection in healthy adults.
Descritores: Luz Solar
Protetores Solares
Vitamina D/sangue
-Valores de Referência
Pele/efeitos da radiação
Fatores de Tempo
Deficiência de Vitamina D
Estatísticas não Paramétricas
Medições Luminescentes
Limites: Humanos
Masculino
Feminino
Adulto
Pessoa de Meia-Idade
Responsável: BR1.1 - BIREME


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Id: biblio-1001149
Autor: Dallazem, Lia Natália Diehl; Benvegnú, Ana Maria; Stramari, Juliana Mazzoleni; Beber, André Avelino Costa; Chemello, Raissa Massaia Londero; Beck, Maristela de Oliveira.
Título: Knowledge and habits of sun exposure in university students: a cross-sectional study in Southern Brazil
Fonte: An. bras. dermatol;94(2):172-181, Mar.-Apr. 2019. tab, graf.
Idioma: en.
Resumo: Abstract BACKGROUND: Excessive sun exposure is the major risk factor for skin cancer. Thus, sun exposure behavior is the major focus for prevention of this disease, since it is potentially modifiable. Increasing the knowledge on sun related habits and other skin cancer risk factors is fundamental in the development of preventive programs, especially when directed to young people. OBJECTIVES: To assess the photoprotection habits and the knowledge about skin cancer in college students. METHODS: We conducted a cross-sectional study from Oct. 16 to Feb. 17, including 371 students from the Federal University of Santa Maria, RS, Brazil, through a self-administered questionnaire. RESULTS: The level of knowledge about skin cancer and photoprotection was unsatisfactory in more than 10% of the students. The occurrence of sunburn was extremely high among students, and 25% reported at least one episode of second degree sunburn. Proper use of sunscreen was referred by only 34% of individuals. Students who reported having received photo education in college were associated with a more consistent use of sunscreen. STUDY LIMITATIONS: health area represented a large part of the sample; instrument validated outside Brazil. CONCLUSIONS: Young people are unaware of basic information about sun protection and exposure. Even among those with proper knowledge, the use of photoprotective measures is very low. The sun exposure has shown to be excessive in most of the students, which makes this population an important target for photo-educational measures.
Descritores: Estudantes/psicologia
Luz Solar
Conhecimentos, Atitudes e Prática em Saúde
Exposição Ambiental/estatística & dados numéricos
Hábitos
-Neoplasias Cutâneas/prevenção & controle
Queimadura Solar/prevenção & controle
Protetores Solares/uso terapêutico
Brasil
Pigmentação da Pele
Estudos Transversais
Inquéritos e Questionários/estatística & dados numéricos
Limites: Humanos
Masculino
Feminino
Adolescente
Adulto
Pessoa de Meia-Idade
Adulto Jovem
Responsável: BR1.1 - BIREME



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