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81.
Luiz Fernando Freire Royes Patrícia Gabbi Leandro Rodrigo Ribeiro Iuri Domingues Della-Pace Fernanda Silva Rodrigues Ana Paula de Oliveira Ferreira Mauro Eduardo Porto da Silveira Junior Luís Roberto Hart da Silva Alan Barroso Araújo Grisólia Danielle Valente Braga Fernando Dobrachinski Anderson Manoel Herculano Oliveira da Silva Félix Alexandre Antunes Soares Sara Marchesan Ana Flavia Furian Mauro Schneider Oliveira Michele Rechia Fighera 《Amino acids》2016,48(6):1373-1389
82.
Guilherme M. Zanghelini Henrique R. A. de Souza Junior Luiz Kulay Edivan Cherubini Paulo T. Ribeiro Sebastião R. Soares 《The International Journal of Life Cycle Assessment》2016,21(12):1759-1775
Purpose
We bibliometrically evaluated the scientific literature outlined around Brazilian life cycle assessment (LCA). Our aim is twofold: (1) Analyze the Brazilian scientific literature on LCA, forming a current view of how the LCA methodology is applied in the country; (2) within this view, trace the evolution of themes, characterize institution collaboration, and indicate major influences in Brazilian LCA community.Methods
Data were outlined around academic production and publications, from 1993 to 2015, indexed by the Institute for Scientific Information (ISI- SCIE and SSCI) through a specific group of keywords. Initially, a temporal evolution and projection of papers, PhD and Master Theses, were performed. In sequence, indexed papers were analyzed through performance indicators (i.e., number of authors, impact factor, among others) and content evaluation (for instance, major addressed themes). Finally, a mapping of science was performed, with the aid of Cite Space software application, where coword (and evolution), cocollaboration (and evolution), and cocitation maps were created.Results and discussion
The survey identified 429 documents divided among international and national papers, PhD and Master Theses. From those documents, 165 were indexed. In terms of production and performance, the results indicate an undeniable evolution of the Brazilian LCA research, as affirmed by relations solidified through time. The main research field is “LCA application” with 84 % of papers, whereas “LCA methodology” completes the framework. In LCA applications, 25 % of publications are related to Biofuels—divided into bioethanol and biodiesel—which makes it the current dominant LCA research area in Brazil. The collaboration network demonstrates three main institution groups, whereas evolution through the years indicates that this situation may further improve. Influential authors are linked to LCA of biofuels, general LCA guidelines, and methodological LCA developments.Conclusions
Brazilian LCA research has been growing and more complex relations between themes and institutions denote that further developments can be expected. Cocollaboration indicates three main clusters, led by USP, Unicamp, and UFRJ. “Biofuels” is the main research area where sugarcane ethanol and biodiesel from different sources are the domain product systems. Cocitation analysis solidifies this statement, pointing to Isaias Macedo (and other biofuel researchers) as the main author in Brazilian LCA after ISO and Mark Goedkoop.83.
84.
Reis Veronica Massena Olivares Fábio Lopes de Oliveira André Luiz Martinez Bueno dos Reis Junior Fábio Baldani José Ivo Döbereiner Johanna 《Plant and Soil》1999,206(2):205-211
Micropropagated plantlets of sugar cane were inoculated with the N2-fixing bacterium Acetobacter diazotrophicus. Various modifications
on the basic plant culture medium MS were made for the plant/bacteria association. The protocol required the inoculation of
the bacteria at the end of the rooting period in a medium without hormones or vitamins, and with the concentration of sugar
and mineral nutrients reduced by a factor of 10. Individual plants were inoculated with A. diazotrophicus and maintained under
the appropriate light and temperature condition used for micropropagation up to 7 days. The system favored the infection and
the establishment of the bacteria within the plant tissue. Bacteria colonized the plant tissue and accumulated in inter-cellular
cavities and the region of lateral root emergence and also colonizes the xylem vessels. The inoculated plantlets were subsequently
transferred to the acclimatization phase and after 30 days it was possible to isolate the bacteria from plant tissue. This
protocol permitted studies of infection and comparison among strains. 相似文献
85.
86.
I Polikarpov M S Junior S Marangoni M H Toyama A Teplyakov 《Journal of molecular biology》1999,290(1):175-184
The crystal structure of neurotoxin Ts1, a major component of the venom of the Brazilian scorpion Tityus serrulatus, has been determined at 1.7 A resolution. It is the first X-ray structure of a highly toxic anti-mammalian beta-toxin. The folding of the polypeptide chain of Ts1 is similar to that of other scorpion toxins. A cysteine-stabilised alpha-helix/beta-sheet motif forms the core of the flattened molecule. All residues identified as functionally important by chemical modification and site-directed mutagenesis are located on one side of the molecule, which is therefore considered as the Na+channel recognition site. The distribution of charged and non-polar residues over this surface determines the specificity of the toxin-channel interaction. Comparison to other scorpion toxins shows that positively charged groups at positions 1 and 12 as well as a negative charge at position 2 are likely determinants of the specificity of beta-toxins. In contrast, the contribution of the conserved aromatic cluster to the interaction might be relatively small. Comparison of Ts1 to weak beta-toxins from Centruroides sculpturatus Ewing reveals that a number of basic amino acid residues located on the face of the molecule opposite to the binding surface may account for the high toxicity of Ts1. 相似文献
87.
Detection of Toxoplasma gondii antibodies in captive non‐human primates in the Amazon region,Brazil 下载免费PDF全文
88.
Fábio Henrique Krenchinski Leandro Paiola Albrecht Alfredo Junior Paiola Albrecht Victor José Salomão Cesco Danilo Morilha Rodrigues Roberto Luis Portz Luiz Henrique Saes Zobiole 《Acta Physiologiae Plantarum》2017,39(2):63
The planting of RR2 Intacta soybeans by farmers has been expanding strongly. However, some visual injuries have been noted after glyphosate application. The aim of this study was to evaluate the influence of glyphosate application on chlorophyll, photosynthesis and water use of four Intacta RR2 soybean cultivars. The experiment was conducted in a greenhouse, in a randomized block design with a 3 × 4 factorial scheme, consisting of three glyphosate rates and four soybean cultivars. The glyphosate formula used was isopropylamine salt + potassium salt. The parameters analyzed were phytotoxicity at 7, 14, 21 and 28 days after application, and total chlorophyll index at 0, 3, 7, 14, 21, 28, 35, 42 and 49 days after application. Furthermore, 40 days after application, the net CO2 assimilation rate (A), transpiration rate (E), stomatal conductance (G), and internal CO2 concentration (Ci) were evaluated as well. The water-use efficiency (WUE) and carboxylation efficiency were calculated. The data were submitted to analysis of variance and compared by the Tukey’s test (p ≤ 0.05), followed by regression analysis. The phytotoxicity influence could be seen until 21 days after application, in which Monsoy 6210 IPRO cultivar was the most injured. The increasing doses promoted a reduction of the chlorophyll level up to 35 days after application in Monsoy 6410 IPRO. The cultivars tested here showed similar chlorophyll index values. On the 3rd, 7th and 14th DAA (Fig. 5a–c), there was a significant linear decline in the chlorophyll index with rising glyphosate dose for all four cultivars. The chlorophyll index cultivars were not influenced by the doses on the 42nd and 49th DAA. There was no difference in water use and carboxylation efficiency. The parameters A, E and A/Ci showed a positive correlation as the doses increased, while Ci declined, in both cultivars. The application of glyphosate on these soybean cultivars causes different injuries according to the sensitivity. In general, RR2 soybeans have the ability to recover from visual intoxication injuries and reestablish the normal chlorophyll production and photosynthetic parameters after glyphosate application. 相似文献
89.
Marcelo?Lopes?Pereira Junior Luiz?Antonio?Ribeiro JuniorEmail author 《Journal of molecular modeling》2017,23(3):89
The polaron stability in organic molecular crystals is theoretically investigated in the scope of a two-dimensional Holstein–Peierls model that includes lattice relaxation. Particularly, the investigation is focused on designing a model Hamiltonian that can address properly the polaron properties in different model oligoacene crystals. The findings showed that a suitable choice for a set of parameters can play the role of distinguishing the model crystals and, consequently, different properties related to the polaron stability in these systems are observed. Importantly, the usefulness of this model is stressed by investigating the electronic localization of the polaron, which provides a deeper understanding into the properties associated with the polaron stability in oligoacene crystals. 相似文献
90.
Genetic and Phytochemical Analysis to Evaluate the Diversity and Relationships of Mate (Ilex paraguariensis A.St.‐Hil.) Elite Genetic Resources in a Germplasm Collection 下载免费PDF全文
Juliana Cristhina Friedrich Adriana Gonela Maria Celeste Gonçalves Vidigal Pedro Soares Vidigal Filho José Alfredo Sturion Euclides Lara Cardozo Junior 《化学与生物多样性》2017,14(3)
The aim of this study was to evaluate the phytochemical and genetic diversity, relationships and identification of mate (Ilex paraguariensis A.St .‐Hil .) elite genetic resources belonging to the Brazilian germplasm collection and mate breeding program. Mate has been studied due to the presence of phytochemical compounds, especially methylxanthines and phenolic compounds. The samples were collected from the leaves of 76 mate elite genetic resources (16 progenies × 5 localities). Total DNA was extracted from mate leaves and 20 random primers were used for DNA amplification. Methylxanthines (caffeine and theobromine) and phenolic compounds (chlorogenic, neochlorogenic, and criptochlorogenic acids) were quantified by HPLC. The genetic divergence estimated was higher within (92%) than among (8%) the different populations. Analysis of genetic distance between origins provided the formation of two groups by UPGMA cluster analysis, with higher polymorphism (94.9%). The average content of caffeine ranged from 0.01 to 1.38% and theobromine of 0.10 – 0.85% (w/w). The caffeoylquinic acids concentrations (1.43 – 5.38%) showed a gradient 3‐CQA > 5‐CQA > 4‐CQA. The coefficient of genetic variation (CVg) was of low magnitude for all mono‐caffeoylquinics acids. Significant correlations (positive and negative) were observed between the phytochemical compounds. Genetic diversity analysis performed by RAPD markers showed a greater intra‐populational diversity; genetic resources with low caffeine and higher theobromine content were identified and can be used in breeding programs; the correlation between methylxanthines and phenolic compounds can be used as a good predictor in future studies. 相似文献