Teste Repositóri
2014-01-01
Resultados de pesquisa
Foram encontrados 16 registos.
Introdução: Apesar do sono ser
uma necessidade biológica com impacto
no crescimento e desenvolvimento e um
hábito saudável a adquirir no primeiro
ano de vida, muitos são os pais que se
queixam das dificuldades dos filhos no
dormir.
Objectivos: Conhecer os hábitos
de sono dos lactentes entre os seis e os
vinte e quatro meses de idade que frequentam
a Consulta de Pediatria dum
Centro de Saúde e avaliar a necessidade
de intervenção preventiva quanto ao ensino
de hábitos de sono correctos.
Material e métodos: Análise dos
resultados de um inquérito de hábitos de
sono numa população de crianças observadas
na consulta entre Janeiro e Março
2004. Foram avaliados os parâmetros
sexo, idade, local e modo do adormecimento
nocturno, frequência dos despertares,
local e modo do readormecimento
e prática de sesta.
Resultados: Da...
Several forest species are severely affected by Phytophthora cinnamomi. The contribution of this oomycete to forest decline and dieback has been broadly reported. In particular, it is consensual that it is the causal agent of ink disease in Castanea sativa. It has been associated with the severe decline of Quercus species, namely the Q. suber and Q. ilex dieback in Portugal and Spain, and has been responsible for the infection of numerous native species and crops. This pathogen persists in the soil or on plant material in the form of chlamydospores allowing the infection of living root tissues when environmental conditions are favorable. © Microscopy Society of America 2012.
Phytophthora cinnamomi
has been reported to be
regularly associated
with cork and holm oak decline. This oomycete secretes elicitins, a
group of unique highly conserved pr
oteins that can enhance plant
defence reactions.
The virulence of two wild type (PA45 and
PA37) and two genetically modified (13C: hygromycin resistant; FATSS: hygromycin resistant and β-cin knock-down) Phytophthora cinnamomi strains towards cork oak (Quercus suber) was assessed via a quantitative
evaluation of disease symptoms arising from a
soil infestation assay, and by a istological analysis of
root colonization. Comparison of virulence, as expressed by symptom severity, resulted in the following ranking: highly virulent (wild type strains), medium virulence (strain 13C) and weakly virulent
(FATSS). Both transgenic strains were compromised in their virulence, as expressed by symptom severity, but strain 13C was much less affected than FATSS.
Microscopic observation showed that the FATSS strain
was unable to effectively invade the root, while 13C
and the two wild type str...
Background: There is a lack of evidence regarding the association between the undernutrition risk at hospital admission with adverse clinical outcomes amongst pulmonology inpatients. The aim of this study was to quantify the association between undernutrition risk at hospital admission and time to discharge alive.
Methods: A retrospective cohort study including patients consecutively admitted to a pulmonology unit was conducted. Undernutrition risk at hospital admission was identified using the Malnutrition Universal Screening Tool. Survival analyses (Kaplan–Meier curves and Cox regression) were carried out.
Results: The sample was composed of 683 patients. Patients who presented high undernutrition risk on hospital admission had a longer length of hospital stay (approximately 50% were discharged to home after 14 days of hospitalizatio...
The oomycete
P. cinnamomi
has been described as strong contributing factor to the decline of cork
oak and holm oak stands occurring in the Iberian Peninsula. There are no eradication methods
available against this pathogen.
Phytophthora cinnamomi e P. cambivora são considerados os agentes
patogénicos da doença da tinta do castanheiro. Estes agentes invadem e
destroem o sistema radicular, levando à morte das árvores e a importantes
perdas económicas.
O declínio do montado tem sido associado a vários agentes patogénicos,
pragas e factores abióticos. Phytophthora cinnamomi tem sido
referido como um potencial agente patogénico do sobreiro e azinheira.
O aparecimento de mais estirpes de microrganismos patogénicos resistentes
a pesticidas impõe o desenvolvimento de novas estratégias de
biocontrolo, entre as quais a estimulação de reações de defesa.
As elicitinas são proteínas de baixo peso molecular, secretadas por
algumas espécies de oomycetes (Phytophthora e Pythium) que induzem
reações de hipersensibilidade e aquisição de resistência sistémica na...
In Portugal, the decline disease has been described in evergreen oaks (Quercus suber L. and Q.ilex subsp. rotundifolia Lam.) since the end of the 19th century. The mortality of these species affects,
particularly the central and southern regions of the country, being one of the most severe forest problems. Phytophthora cinnamomi Rands is the main pathogen responsible for the cork and holm
oak mortality in Portugal. Several studies have been developed aiming at a better understanding of the effect of the P. cinnamomi action on the cork oak trees decline. The present work describes preliminary results of some of these studies.
Phytophthora cinnamomi and P. cambivora are considered as the causal agents of Castanea sativa ink disease. These soil-borne plant pathogens invade and destroy the root system leading to the death of the trees. Most Phytophthora species secrete elicitins, a group of unique highly conserved proteins that are able to enhance plant defence responses in a systemic acquired resistance manner against infection by several pathogens. A cluster of four elicitin genes was identified in P. cinnamomi. In previous works one of these elicitins, α- cinnamomin was shown to restrict the invasion of root cortical tissues by P. cinnamomi preventing vascular colonization in cork and holm oak. In the present work, roots of chestnut plantlets grown in vitro were allowed to absorb α-cinnamomin at 100 μg/ml for two days before being inoculated with P. cinnamo...
