Leonardo V Araújo

Learn More
AIMS To investigate the effect of the biosurfactants surfactin and rhamnolipids on the adhesion of the food pathogens Listeria monocytogenes, Enterobacter sakazakii and Salmonella Enteritidis to stainless steel and polypropylene surfaces. METHODS AND RESULTS Quantification of bacterial adhesion was performed using the crystal violet staining technique.(More)
OBJECTIVES To evaluate cortisol levels and prevalence of adrenal insufficiency in patients with severe community-acquired pneumonia (CAP). DESIGN AND SETTING Retrospective cohort study in a 24-bed medical-surgical intensive care unit (ICU). PATIENTS Forty patients with severe CAP admitted to the ICU from March 2003 and May 2005. MEASUREMENTS AND(More)
The aim of this study was to use scanning electron microscopy (SEM) to elucidate the infection process of Pyricularia oryzae on leaf surfaces of wheat seedlings. Wheat seedlings were inoculated with a conidial suspension of P. oryzae (105 conidia/mL), and leaf samples were collected for observation via SEM. The first blast symptoms appeared 48 h after(More)
This study investigated the effect of silicon (Si) on the potentiation of rice resistance against leaf scald at the microscopic level. Rice plants ('Primavera') were grown in a nutrient solution containing 0 (-Si) or 2 mM (+Si) Si. The foliar Si concentration of the +Si plants (3.6 dag/kg) increased in comparison with the -Si plants (0.3 dag/kg). An X-ray(More)
Ulvan is an algal polysaccharide known for its ability to induce resistance to plant diseases such as the Glomerella leaf spot of apple caused by Colletotrichum gloeosporiodes. This study was aimed at investigating microscopically, in tests in vitro and in vivo, whether ulvan interferes in the development of pre-infective structures of C. gloeosporioides.(More)
This study was designed to characterize and describe host cell responses of stem tissue to mango wilt disease caused by the fungus Ceratocystis fimbriata in Brazil. Disease progress was followed, through time, in inoculated stems for two cultivars, 'Ubá' (field resistant) and 'Haden' (field susceptible). Stem sections from inoculated areas were examined(More)
BACKGROUND Maintaining adequate cerebral perfusion pressure is an essential aspect in the treatment of severe acute brain injury. To accomplish this therapeutic goal vasopressors are usually required. Vasopressin is an important endogenous stress hormone and the infusion of low-dose vasopressin and terlipressin has been used to reverse severe hypotension.(More)
Mango wilt, caused by Ceratocystis fimbriata, is one of the most serious diseases affecting mango production worldwide. Considering the great variation in the basal level of wilt resistance among mango cultivars, this study aimed to assess changes in photosynthesis and the role played by the carbon metabolism on two mango cultivars with contrasting(More)
Mango wilt, caused by Ceratocystis fimbriata, is a disease of great economic importance in mango production. Considering that the physiological effects of this vascular disease are not fully characterized, this study aimed to investigate some alterations in mango leaves from cultivars Ubá and Tommy Atkins, respectively, resistant and moderately resistant to(More)
This study aimed to compare the effects of three different resistance exercise models on the quadriceps muscle cross-sectional area, as well as on mTOR phosphorylation and other pivotal molecules involved in the upstream regulation of mTOR. Twenty-four male Wistar rats were divided into untrained (control), endurance resistance training, strength resistance(More)
  • 1