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Jorge Espinha Marques,José M. Marques,Helder I. Chaminé,Paula M. Carreira,Paulo E. Fonseca,Fernando A. Monteiro,Rui Moura,Javier Samper,Bruno Pisani,José Teixeira,José Martins Carvalho,Fernando Rocha 한국지질과학협의회 2013 Geosciences Journal Vol.17 No.3
Mountains are often considered as the world’s water towers. This paper presents a critical review on the research concerning the integrated assessment of groundwater resources of the mountain hydrogeologic system of Serra da Estrela Natural Park (central Portugal). The study area is the Zzere river basin upstream of Manteigas village located at the Serra da Estrela Mountain in Central Portugal. It provides the source of strategic water resources for the Portuguese mainland, including normal groundwaters, thermomineral waters and surface waters. An integrated approach has been used to formulate a conceptual model for this complex mountain hydrogeological system by integrating the geological, morphotectonic, hydroclimatic, unsaturated soil zone, hydrogeological, hydrogeophysical, hydrogeochemical and isotopic data. This model has been useful to: i) evaluate the water resources; ii) provide the basis for a sustainable management of water resources, iii) design measures for groundwater exploitation and contamination control; and iv) set up land-use policies.
José M. Marques,P.M. Carreira,J.E. Marques,H.I. Chaminé,P.E. Fonseca,F.A. Monteiro Santos,H.G.M. Eggenkamp,J. Teixeira 한국지질과학협의회 2010 Geosciences Journal Vol.14 No.4
The aim of this paper is to review the results of the assessment of low-temperature geothermal resources (issue temperatures between 41 and 77℃) that occur in the Portuguese mainland. For this purpose, a multidisciplinary approach, including geologic, tectonic, geochemical, geophysical and isotopic (2H, 18O, 13C, 3H and 14C) techniques, was applied in order to update local and/or regional conceptual circulation models. Three case studies of N-Portugal are presented and discussed. This paper describes different low-temperature geothermal waters presenting similar hydrogeological conceptual models but rather different geochemical signatures (e.g., HCO3–Na with pH 8, HCO3/Na/CO2-rich with pH 7 and HCO3–Na with pH 9, type waters). In fact, in the studied low-temperature geothermal systems, local/regional high altitude sites associated with highly fractured rocks play an important role in conducting the infiltrated meteoric waters towards the discharge zones near the Spas. The discharge zones are mainly related to the intersection of major regional fault lineaments (and conjugate structures), responsible for creating the mineral waters ascent. In some cases, geochemical and isotopic data point out to the existence of anthropogenic contamination of some geothermal spring waters related to the intense use of fertilizers in areas of widespread agricultural practices
Analysis of the bacterial community in glassy-winged sharpshooter heads
Paulo Teixeira LACAVA,Jennifer PARKER,Fernando Dini ANDREOTE,Francisco DINI-ANDREOTE,José Luiz. RAMIREZ,Thomas A. MILLER 한국곤충학회 2007 Entomological Research Vol.37 No.4
The glassy-winged sharpshooter (GWSS), Homalodisca vitripennis, is an important vector of various strains of Xylella fastidiosa, which cause disease in a variety of economically important plants. These diseases include citrus variegated chlorosis, oleander leaf scorch and Pierce’'s Disease of grapevines. Symbiotic control (SC) is a new strategy that uses symbiotic endophytes as biological control agents to antagonize or displace the pathogenic strains of X. fastidiosa. Candidate endophytes for use in SC must occupy the xylem of host plants and attach to the pre-cibarium and cibarium of sharpshooter insects in order to have access to the pathogen. The study of the bacterial community of GWSS heads by isolation and denaturing gradient gel electrophoresis (DGGE) revealed the presence of species that may be suitable for use in SC. In addition, the results indicated that two important factors, insect age and choice of host plant, affect the composition of the bacterial community in GWSS heads. The main bacterial genera isolated as colonizers of GWSS heads were identified, using partial 16S rRNA gene sequencing, as Bacillus, Pseudomonas, Pedobacter and Methylobacterium, as well as the species Curtobacterium flaccumfaciens. DGGE patterns revealed a diversity of endophytic species able to colonize the GWSS head. The main genera isolated in culture were also identified using this technique. Principal component analysis (PCA) from polymerase chain reaction (PCR)-DGGE patterns indicated that the bacteria inhabiting the GWSS head are similar to those found as endophytes inside the host plants, and that insect developmental stage and preferential feeding on one host plant species over another are important factors in determining the composition of the bacterial community in the GWSS head. However, a shift in host plants for a small period of time did not cause changes in the compositions of these communities.
Physiological adaptations induced by swimming in mice fed a high fat diet
Pedro Augusto Silva Nogueira,Miriam Pimenta Pereira,Jeferson José Gomes Soares,Anderson Ferraz Norton Filho,Izadora Mayumi Fujinami Tanimoto,Ivana Alice Teixeira Fonseca,Homero Oliveira Avelar,Francoi 한국운동재활학회 2017 JER Vol.13 No.3
This study examined physiological variables of animals fed with a high-fat diet (HFD) or with a normal diet (ND) subjected to swimming at low and moderate level. Over 16 weeks, a group of animals was fed with HFD or ND, and at the 8 weeks, they started swimming with 50% or 80% of the maximum load achieved in the progressive work test. Weekly, body weight and the amount of ingested food were registered. The gly-cemic level was measured at the beginning, middle and at the end of the experiment. Adipose tissue, gastrocnemius muscles and hearts were collected for morphometry. The results showed that the animals fed an HFD had a minor caloric intake; however, the HFD increased body weight and adiposity, likely causing cardiac hypertrophy and an increase in the glycemic level. In this context, swimming with an 80% load contributed positively to weight control, adiposity, glycemic level, to control cardiac hypertrophy and induce hypertrophy in the gastroc-nemius muscle. All parameters assessed showed better results for the ND animals. Therefore, the importance of fat consumption was empha-sized in relation to obesity onset. The practice of swimming with an 80% load produced greater benefits than swimming with a 50% load for overweight treatment.
João Pedro Alves de Azevedo Barros,Fábio Bentes Freire,José Teixeira Freire 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.11
We analyzed modified spouted bed configurations incorporating three different types of mechanical stirrer, in comparison to a conventional spouted bed. Straight-blade, inclined-blade, and helical screw agitators were used with different types of inert particles. The behavior of the fluid dynamic curves was qualitatively similar for the systems with agitators and the conventional design, except for the screw-type agitator. For the straight-blade and inclinedblade agitators, increase of the rotation speed had a positive effect on the fluid dynamic parameters, reducing the air flow and the pressure drop in the bed. The effects of rotation speed and blade inclination on the fluid dynamics were minimized at 240 rpm, although the mass of particles could influence these parameters. The inclined-blade stirrer performed the best, reducing airflow between 40 and 66% compared to the conventional spouted bed. For the screw-type stirrer, the reduction was around 27% in some of the experiments. The rotation speed of the stirrer and the air flow to agitate the bed affect the average cycle time of the process, with a stronger effect on the rotation speed. Overall, the use of the stirrers in the bed provided significant improvement, with reduction of both the air flow, the pressure drop and average cycle time, as well as greater stability of the bed.
Yeimy A. Rodríguez-Restrepo,Cristina M.R. Rocha,José A. Teixeira,Carlos E. Orrego 한국섬유공학회 2020 Fibers and polymers Vol.21 No.12
Fibers from passion fruit stalks were first recovered with a pulping and bleaching process. Two mechanicaltreatments were further applied to the fibers, homogenization (with and without ultrasound), and blender application. Theeffect of those treatments on fibers was evaluated. The chemical composition of the different stages of fibers undergoingtreatment were measured according to TAPPI standards and were also analyzed by SEM, FTIR, and XRD. Trypsin wasimmobilized by adsorption and by covalent binding. The biocatalyst support-trypsin was evaluated in terms ofimmobilization yield, retention, and enzymatic activity. The experimental results demonstrated that the final celluloseconcentration in the fibers was 44 % higher than that in the raw stalks. The cellulose nanofibers obtained by homogenizationpresented a size distribution between 20-200 nm, and the application of ultrasound did not show a significant effect on size(between 50 to 300 nm). Trypsin immobilized using glycidol presented an immobilization yield of 67 % and presented higherretention and enzymatic activity (1.17±0.05 U/mg protein and 44.0±2.0 %, respectively). These results show that passionfruit stalks can be successfully used as a source of cellulose nanofibers and also can be used as carriers for the immobilizationof trypsin.
Edson Cabral da Silva,Takashi Muraoka,Alefe Viana Souza Bastos,Vinícius Ide Franzini,Salatiér Buzetti,Frederico Antonio Loureiro Soares,Marconi Batista Teixeira,José Alberto Bendassolli 한국작물학회 2020 Journal of crop science and biotechnology Vol.23 No.3
Erratum to: J. Crop Sci. Biotech. 2020 (March) 23 (2):117–126 https ://doi.org/10.1007/s1289 2-019-0288-0
Edson Cabral da Silva,Takashi Muraoka,Alefe Viana Souza Bastos,Vinícius Ide Franzin,Salatiér Buzetti,Frederico Antonio Loureiro Soares,Marconi Batista Teixeira,José Alberto Bendassolli 한국작물학회 2020 Journal of crop science and biotechnology Vol.23 No.2
Cover plants are intended to cover the soil, protecting it from erosion, nutrient leaching, and providing nutrients through recycling or biological fixation. The objectives of this study were to evaluate the dry biomass productivity and total accumulation of nutrients in the cover crops shoots and in the upland rice grown in succession; and evaluate the effect of the isolated and combined use of cover crops and urea on upland rice crop, grown under no-tillage system. The field experiment was conducted at Selvíria-MS, Brazil, in an Oxisol (Rhodic Haplustox), cerrado (savannah) phase. The experimental design was randomized blocks, in a 5x3 factorial scheme. The treatments were four cover crops species: sunn hemp (Crotalaria juncea L.), pigeon pea (Cajanus cajan L.), green velvet bean (Mucuna prurens), millet (Pennisetum glaucum L.), and spontaneous vegetation (fallow in off-season) combined with 20 kg N ha-1 applied at sowing, 20 kg N ha-1 applied at sowing + 60 kg N ha-1 at plus topdressing, and without mineral N fertilizer application. The millet recycled large amounts of K, Mg, S, and micronutrients, but negatively influenced the rice grain yield grown in succession. There was no response to topdressed mineral N fertilizer when the crop was grown in rotation to legume cover crops. Upland rice under no-tillage showed a positive response to the N fertilization at seeding and when it is grown in rotation with the use of millet or fallow in the off-season. Upland rice also showed a response to N fertilization applied at topdressing.
Xin Xiangjun,António Luís Jesus Teixeira,Paulo P. Monteiro,José R. F. da Rocha,Paulo Sérgio de Brito André 한국전자통신연구원 2005 ETRI Journal Vol.27 No.3
The transmission performance of optical labeling based on a combined frequency shift keying/amplitude shift keying (FSK/ASK) format is studied by numerical simulation. The simulation demonstrates that the bit-error ratio (BER) characteristic of an ASK signal is limited by the extinction ratio, received optical power, and dispersion, simultaneously. However, an FSK signal is mainly limited by the extinction ratio (ER) and received optical power when the peak spectrum, which is used to detect the FSK signal, is relatively narrow.