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Luiz Carlos Borges,Marilia Braz Botelho 국립민속박물관 2008 International Journal of Intangible Heritage Vol.3 No.-
The intangible heritage is not easy to present in amuseum exhibition, and this is perhaps especially so inthe case of what the 2003 UNESCO Intangible HeritageConvention terms ‘knowledge and practices concerningnature and the universe’. The Brazilian Federal Museumof Astronomy and Related Sciences (MAST), Rio deJaneiro, initiated an exhibition and educationalprogramme on this theme for International MuseumsWeek in 2004, focusing particularly on four very differentcosmologies (i.e. narratives that attempt to explain theorigin of the Universe): the Biblical story in Genesis, thecontemporary scientific ‘Big Bang’ theory, and thecreation stories of two Brazilian indigenous populations:the Tukano people of the Amazon Region, and the Guaraniof southern Brazil and some neighbouring countries. Theevent, called Myths of Origin - man and hiscomprehension of the Universe and of the planet on whichhe lives, consisted of a conceptual, sensory andeducational experience whose principal objective was tochallenge preconceptions while questioning also thevisitors’ perceptions which arise from an educationalsystem where many of these ideas are taught as absolutetruths. Following Paulo Freire’s theory of learning and anon-restrictive understanding of the sciences, we choseto present the four different narratives on an equal basisand invited the visitor to explore these withoutpreconceptions. The underlying objective was to establisha dialogue among these diverse discourses about thecosmos, which we hoped would encourage visitors to takea critical view of the sciences and the way they areinterpreted in museums.
Impact of radiotherapy on mandibular bone: A retrospective study of digital panoramic radiographs
Luiz Felipe Palma,Ricardo Yudi Tateno,Cíntia Maria Remondes,Marcelo Marcucci,Arthur Rodriguez Gonzalez Cortes 대한영상치의학회 2020 Imaging Science in Dentistry Vol.50 No.1
Purpose: The purpose of this study was to investigate the impact of radiotherapy on mandibular bone tissue in head and neck cancer patients through an analysis of pixel intensity and fractal dimension values on digital panoramic radiographs. Materials and Methods: Thirty patients with radiographic records from before and after 3-dimensional (3D) conformational radiotherapy were selected. A single examiner carried out digital analyses of pixel intensity values and fractal dimensions, with the areas of interest unilaterally located in the right angle medullary region of the mandible below the mandibular canal and posterior to the molar region. Results: Statistically significant decreases were observed in the mean pixel intensity (P=0.0368) and fractal dimension (P=0.0495) values after radiotherapy. Conclusion: The results suggest that 3D conformational radiotherapy for head and neck cancer negatively affected the trabecular microarchitecture and mandibular bone mass.
Effects of Extrusion Variables on Functional and Nutritional Properties of Extruded Oat Products
Luiz Carlos Gutkoski,Ahmed Atia EI-Dash 한국식품영양과학회 1999 Preventive Nutrition and Food Science Vol.4 No.3
The purpose of this research was to study the effects of initial moisture levels and extrusion temperatures on dietary fiber, nitrogen solubility index, available lysine, and the in vitro protein digestibility of extruded oat products. The dehulled grains were ground in a Brabender Quadrumat Senior mill and the coarse fraction, with higher crude protein, lipids and dietary fiber were conditioned to various moisture levels (15.5~25.5%) and extruded in a Brabender single-screw laboratory extruder. The extrudates showed a higher amount of soluble dietary fiber (8.14%) than in the raw material. However, the extrusion process affected the nutritional value of the protein due to a decrease in available lysine with increased temperature. The in vitro protein digestibility was unaffected by initial moisture levels and the extrusion temperatures examined.
Luiz O. Oliveira,남영우,Rudolf Jung,Niels C. Nielsen 한국분자세포생물학회 2002 Molecules and cells Vol.13 No.1
A short interdomain sequence between the N- and Cterminal domains of b-conglycinin, the major 7S seed storage protein of soybean, was selected as a target for insertion of amino acid residues specifically cleaved by an asparaginyl endopeptidase that processes 11S globulins into acidic and basic chains. Modified b- conglycinin subunits containing the proteolytic cleavage site self-assembled into trimers in vitro at an efficiency similar to that of the unmodified subunit. In contrast to the absence of cleavage of the unmodified subunits, however, the modified b-conglycinin trimers were processed by purified soybean asparaginyl endopeptidase into two polypeptides, each the size expected for the b-conglycinin N- and C-terminal domains, respectively. The cleavage did not alter the assembly of mutant b-conglycinins and the cleaved mutant trimers remained stable to further proteolytic attack. To examine the possibility of coassembly between the cleaved 11S and 7S subunits, in vitro processed mutant b-conglycinin subunits were mixed with native dissociated 11S globulin preparations. Reassembly at a high ionic condition did not induce the 7S subunits to interact with 11S subunits to form hexameric complexes. Thus, cleavage of 7S globulin subunits into acidic and basic domains may not be sufficient for hexamer as-
Luiz Paulo Carvalho Rocha,Tânia de Carvalho Rocha,Stephanie de Cássia Carvalho Rocha,Patrícia Valéria Henrique,Flávio Ricardo Manzi,Micena Roberta Miranda Alves e Silva 대한영상치의학회 2020 Imaging Science in Dentistry Vol.50 No.2
Purpose: In this study, we used ultrasonography to monitor the use of hyaluronic acid (HA) as a filler in the face for esthetic reasons. We monitored changes in the filler shape, distribution, and relationship with adjacent anatomical structures over a 180-day period. Materials and Methods: Two patients each received an ultrasound-guided injection of HA, with different products and application sites for each patient. In 1 patient, the injection was administered in the angle of the mandible, while in the other, it was administered in the zygomatic region. The injection sites were monitored via ultrasonography at 24 hours, 30 days, and 180 days, at which times the imaging characteristics of the filler were observed. All injections were performed by the same professional, as were the ultrasound exams, which were conducted using the same equipment. Results: In both cases, the HA fillers were visualized using ultrasound at all time points. Some differences were observed between the cases in the images and the distribution of the pockets of filler. In 1 case, the filler appeared as a dark hypoechoic region with well-defined contours, and the material was observed to have moved posteriorly by the 180-day mark. In the other case, the material appeared hyperechoic relative to the previous case and presented no noticeable changes in its anteroposterior distribution over time. Conclusion: Based on these 2 cases, ultrasonography can be a complementary tool used to monitor facial fillers over the long term, allowing for the dynamic observation of different fillers.
Pires Luiz F. 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.9
Soils are porous materials with high shielding capability to attenuate gamma and X-rays. The disposal of radionuclides throughout the soil profile can expose the living organisms to ionizing radiation. Thus, studies aiming to analyze the shielding properties of the soils are of particular interest for radiation shielding. Investigations on evaluating the shielding capabilities of highly weathered soils are still scarce, meaning that additional research is necessary to check their efficiency to attenuate radiation. In this study, the radiation shielding properties of contrasting soils were evaluated. The radiation interaction parameters assessed were attenuation coefficients, mean free path, and half- and tenth-value layers. At low photon energies, the photoelectric absorption contribution to the attenuation coefficient predominated, while at intermediate and high photon energies, the incoherent scattering and pair production were the dominant effects. Soils with the highest densities presented the best shielding properties, regardless of their chemical compositions. Increases in the attenuation coefficient and decreases in shielding parameters of the soils were associated with increases in clay, Fe2O3, Al2O3, and TiO2 amounts. In addition, this paper provides a comprehensive description of the shielding properties of weathered soils showing the importance of their granulometric fractions and oxides to the attenuation of the radiation