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1,4- Addition of diazomethane to a heterodiene: a direct preparation of the oxazolic ring Anais da ABC (AABC)
Emery,Flávio da S.; Silva,Raphael S.F.; Moura,Kelly C.G. de; Pinto,Maria C.F.R.; Amorim,Mauro B.; Malta,Valéria R.S.; Santos,Regina H.A.; Honório,Kátia M.; Silva,Albérico B.F. da; Pinto,Antonio V..
The reaction of naphthoquinone-oximes (3) and (4) with diazomethane yields directly, in one step, the oxazoles (5) and (6), respectively.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Quinones; Oximes; Diazomethane; Oxazoles.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000100004
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15N-labed glycine synthesis Anais da ABC (AABC)
Tavares,Claudinéia R.O.; Bendassolli,José A.; Coelho,Fernando; Sant'ana Filho,Carlos R.; Prestes,Clelber V..
This work describes a method for 15N-isotope-labeled glycine synthesis, as well as details about a recovery line for nitrogen residues. To that effect, amination of alpha-haloacids was performed, using carboxylic chloroacetic acid and labeled aqueous ammonia (15NH3). Special care was taken to avoid possible 15NH3 losses, since its production cost is high. In that respect, although the purchase cost of the 13N-labeled compound (radioactive) is lower, the stable tracer produced constitutes an important tool for N cycling studies in living organisms, also minimizing labor and environmental hazards, as well as time limitation problems in field studies. The tests were carried out with three replications, and variable 15NH3(aq) volumes in the reaction were used...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Stable isotope; Glycine; Amino acid.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652006000300005
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200.000 IU of vitamin D does not reduce resting Blood Pressure and Inhibit Post-Exercise Hypotension in elderly women: a pilot study Anais da ABC (AABC)
GONÇALVES,MARIA DA CONCEIÇÃO R.; MIRANDA NETO,MANOEL; CAVALCANTE,ISA G.M.; SEBADELHE,VITTÓRIA R.R.J.; SOUZA,MICHELE F. De; NEVES,JULIANA P.R.; SOUZA,FLAVIA T.L. DE; TAVARES,RENATA L.; COSTA,MATHEUS S.; SILVA,ALEXANDRE S..
Abstract Given the scarcity of studies with elderly and the existence of studies investigating the effect of vitamin D supplementation in PEH (post exercise hypotension), this study evaluated the effect of a single megadose of vitamin D on resting blood pressure (RBP) and post-exercise hypotension (PEH) in the elderly. 11 hypertensive elderly women (70.3 ± 1.7 years) received a single megadose of 200.000 IU of cholecalciferol or a placebo, orally, through capsules. On day 7, the subjects performed 30 minutes of aerobic exercise with blood pressure measurement before exercise and every 10 minutes after exercise during 60 minutes, besides cardiac autonomic modulation. RBP did not significantly change. Exercise promoted significant systolic PEH only in one...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aerobic exercise; Aged; Hypertension; Hypotension; Cholecalciferol.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100903
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2,3,8-Trisubstituted Quinolines with Antimalarial Activity Anais da ABC (AABC)
MARTINEZ,PABLO D.G.; KRAKE,SUSANN H.; POGGI,MAITIA L.; CAMPBELL,SIMON F.; WILLIS,PAUL A.; DIAS,LUIZ C..
ABSTRACT Combination therapy drugs are considered a fundamental way to control malaria as it mimimizes the risk of emergence of resistance to the individual partner drugs. Consequently, this type of therapy constitutes a driving force for the discovery of new drugs with different modes of action, since this will provide options for combining different drugs to achieve the optimum antimalarial treatment. In this context, a 2,3,8-trisubstitued quinoline compound was found in a high throughput screen (HTS) to show an excellent inhibition of P. falciparum NF54 (IC50 = 22 nM) and low cytotoxicity. We performed a detailed evaluation of the substituents to improve the metabolic stability and solubility liabilities of the original hit and identified derivatives...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antimalarial activity; Trisubstituted quinoline; SAR; Resistance.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000301215
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37 years of scientific activity in a Biochemistry Department in Brazil: patterns of growth and factors leading to increased productivity Anais da ABC (AABC)
Gomes,Urubatã E.; Oliveira,Diogo L. de; Berti,Luciana C.; Amaral,Olavo; Souza,Diogo O.; Wofchuk,Susana T..
Scientific activity in Brazil has experienced an accelerated growth in the past decades, with an increase in productivity that greatly surpasses the international average. This growth has occurred mostly at the expense of centers of excellence in public universities, which account for the vast majority of the country's scientific output. The aim of this study was to evaluate the production of the Department of Biochemistry of a large public university in southern Brazil (Universidade Federal do Rio Grande do Sul), as well as to identify internal and external policies that have influenced this growing production profile. We have performed a historical analysis of the scientific output of this Department of Biochemistry, which accounts for a considerable...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Scientific productivity; Scientific growth profile; Biochemistry; UFRGS.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300030
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40Ar/39Ar ages (600-570 Ma) of the Serra do Azeite transtensional shear zone: evidence for syncontractional extension in the Cajati area, southern Ribeira belt Anais da ABC (AABC)
Machado,Rômulo; Dehler,Nolan M.; Vasconcelos,Paulo.
This paper presents 40Ar/39Ar ages of the rocks from the Serra do Azeite transtensional shear zone in the southern part of the Ribeira belt, between the States of São Paulo and Paraná, and also discusses the regional correlations and the tectonic implications for other parts of the belt. The geochronological data suggest that transtensional deformation was active between 600 and 580 Ma (hornblende and muscovite apparent ages, respectively). This time span is considerably older than previous proposals for the period of activity of these structures (520-480 Ma) in the northern segment of this belt and in the Araçuaí belt. Kinematic analysis of the dated mylonites shows extensional structures with top-down movement to ESE compatible with structures found in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Syncontractional extension; 40Ar/39Ar ages; Ribeira belt.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000400011
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40Ar/39Ar geochronology at the Instituto de Geociências, USP: instrumentation, analytical procedures, and calibration Anais da ABC (AABC)
VASCONCELOS,PAULO M.; ONOE,ARTUR T.; KAWASHITA,KOJI; SOARES,ADALBERTO J.; TEIXEIRA,WILSON.
Laser heating 40Ar/39Ar geochronology provides high analytical precision and accuracy, mum-scale spatial resolution, and statistically significant data sets for the study of geological and planetary processes. A newly commissioned 40Ar/39Ar laboratory at CPGeo/USP, São Paulo, Brazil, equips the Brazilian scientific community with a new powerful tool applicable to the study of geological and cosmochemical processes. Detailed information about laboratory layout, environmental conditions, and instrumentation provides the necessary parameters for the evaluation of the CPGeo/USP 40Ar/39Ar suitability to a diverse range of applications. Details about analytical procedures, including mineral separation, irradiation at the IPEN/CNEN reactor at USP, and mass...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Geochronology; 40Ar/39Ar method; Irradiation; Calibration.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000200008
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(4S)-4,8-dihydroxy-1-tetralone and other chemical constituents from Pestalotiopsis sp. EJC07, endophytic fromBauhinia guianensis Anais da ABC (AABC)
Souza,Eleane M.C. de; Silva,Ellon L. Da; Marinho,Andrey M.R.; Marinho,Patrícia S.B..
The present work reports the isolation of eight compounds fromPestalotiopsis sp. EJC07 isolated as endophytic fromBauhinia guianensis, a tipical plant of the Amazon. The compounds (4S)-4,8-dihydroxy-1-tetralone (1), uracil (2), uridin (3), p-hydroxybenzoic acid (4), ergosterol (5), ergosterol peroxide (6), cerevisterol (7) and ducitol (8) were isolated by chromatographic procedures and identified by spectral methods of 1D and 2D NMR and MS. The compound 1 is being reported for the first time in the genusPestalotiopsis.
Tipo: Info:eu-repo/semantics/article Palavras-chave: B. guianensis; Endophityc fungus; Pestalotiopsis; Tetralone.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100029
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6-Bromoindirubin-3’-oxime promotes osteogenic differentiation of canine BMSCs through inhibition of GSK3β activity and activation of the Wnt/β-catenin signaling pathway Anais da ABC (AABC)
ZHAO,XIAO-E; YANG,ZHENSHAN; GAO,ZHEN; GE,JUNBANG; WEI,QIANG; MA,BAOHUA.
This study aimed to investigate how 6-bromoindirubin-3’-oxime (BIO) increases the osteogenic differentiation of canine bone mesenchymal stem cells (BMSCs) and the role of the Wnt/β-catenin signaling pathway in this process. We mimicked the effect of Wnt by adding BIO to the culture medium of BMSCs and examined whether canonical Wnt signaling positively affects the differentiation of these cells into osteoblasts. Canine BMSCs were cultured with 0.5 and 1.0 μM BIO under osteogenic conditions and then differentiation markers were investigated. It was found that BIO significantly increased the activity of alkaline phosphatase (ALP), the number of ALP-positive cells, the mineralization level and calcium deposits. Moreover, cells cultured with 0.5 and 1.0 μM...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone mesenchymal stem cells; Bromoindirubin oxime; Osteogenetic differentiation; Canine.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100610
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6-Gingerol inhibits hair cycle via induction of MMP2 and MMP9 expression Anais da ABC (AABC)
HOU,CHUN; MIAO,YONG; JI,HANG; WANG,SUSHENG; LIANG,GANG; ZHANG,ZHIHUA; HONG,WEIJIN.
ABSTRACT 6-Gingerol is the major active constituent of ginger. In the current study, we aimed to investigate the mechanisms underlying the effects of 6-Gingerol on hair growth. Mice were randomly divided into five groups; after hair depilation (day 0), mice were treated with saline, or different concentrations of 6-Gingerol for 11 days. The histomorphological characteristics of the growing hair follicles were examined after hematoxylin and eosin staining. The results indicated that 6-Gingerol significantly suppressed hair growth compared with that in the control group. And choose the concentration of 6-Gingerol at 1 mg/mL to treated with mice. Moreover, 6-Gingerol (1 mg/mL) significantly reduced hair re-growth ratio, hair follicle number, and hair follicle...
Tipo: Info:eu-repo/semantics/article Palavras-chave: MMP2; MMP9; 6-Gingerol; Hair growth.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602707
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7-epi-griffonilide, a new lactone from Bauhinia pentandra: complete 1H and 13C chemical shift assignments Anais da ABC (AABC)
ALMEIDA,MACIA C.S. DE; SOUZA,LUCIANA G.S.; FERREIRA,DANIELE A.; PINTO,FRANCISCO C.L.; OLIVEIRA,DÉBORA R. DE; SANTIAGO,GILVANDETE M.P.; MONTE,FRANCISCO J.Q.; BRAZ-FILHO,RAIMUNDO; LEMOS,TELMA L.G. DE.
ABSTRACT A new lactone, 7-epi-griffonilide (1), and six known compounds, 2, 3a - 3c, 4a and 4b, were isolated from the leaves of Bauhinia pentandra (Fabaceae). The structures elucidation of 1 and 2 were based on detailed 2D NMR techniques and spectral comparison with related compounds, leading to complete assignment of the 1H and 13C NMR spectra.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bauhinia pentandra; Fabaceae; Cyanoglucoside; Lactones; RMN..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100065
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A bone fragment of a probable aquatic vertebrate in the Serra Alta Formation (upper permian of Paraná Basin) Anais da ABC (AABC)
HACHIRO,JORGE; GIANNINI,PAULO C.F.; KINJO,RENATA N..
Tipo: Info:eu-repo/semantics/other
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000300024
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A brief note on the paleofauna of "Tartaruguito site", Adamantina Formation, Bauru Group, Brazil Anais da ABC (AABC)
HENRIQUES,DEISE D.R.; SUÁRES,JOSÉ M.; AZEVEDO,SERGIO A.K.; CAPILLA,RAMSES; CARVALHO,LUCIANA B..
Tipo: Info:eu-repo/semantics/other
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000200019
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A brief report on some health aspects of rats fed with crescent levels of recombinant chagasin, a potential plant defense protein Anais da ABC (AABC)
Oliveira Neto,Osmundo B.; Farias,Davi F.; Vasconcelos,Ilka M.; Paes,Norma S.; Monteiro,Ana C. S.; Silva,Maria C. M. da; Guimarães,Luciane M.; Carvalho,Ana F.U.; Grossi-de-Sá,Maria F..
Chagasin may be considered a potential plant-incorporated protectant (PIP) protein due to its deleterious effects on insect pests. However, extensive safety studies with PIP's are necessary before introducing them into the target plant. Thus, a short-term feeding trial in rats with high doses of r-chagasin was conducted to provide evidences about its safety. Three test diets containing casein + r-chagasin (0.25, 0.5 and 1% of total protein) were offered to rats (10 days). The test diets did not show adverse effects upon the development, organ weight, hematological parameters and serum protein profiles of rats, providing preliminary information on the safety of r-chagasin.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chagasin; Recombinant protein; Hazard potential; Short-term rat feeding trial.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100019
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A close look at above ground biomass of a large and heterogeneous Seasonally Dry Tropical Forest - Caatinga in North East of Brazil Anais da ABC (AABC)
CASTANHO,ANDREA D.A.; COE,MICHAEL; ANDRADE,EUNICE M.; WALKER,WAYNE; BACCINI,ALESSANDRO; CAMPOS,DIEGO A.; FARINA,MARY.
Abstract This work is focused on characterizing and understanding the aboveground biomass of Caatinga in a semiarid region in northeastern Brazil. The quantification of Caatinga biomass is limited by the small number of field plots, which are inadequate for addressing the biome’s extreme heterogeneity. Satellite-derived biomass products can address spatial and temporal changes but they have not been validated for seasonally dry tropical forests. Here we combine a compilation of published field phytosociological observations with a new 30m spatial resolution satellite biomass product. Both data were significantly correlated, satellite estimates consistently captured the wide variability of the biomass across the different physiognomies (2-272 Mg/ha). Based...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Above ground biomass; Caatinga; Physiognomy; Remote sensing; Seasonally dry tropical forest; Semiarid.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100604
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A closer look at the Impact Factor (JCR 2012): problems, concerns and actions needed Anais da ABC (AABC)
KELLNER,ALEXANDER W.A.; AZEVEDO,RICARDO A..
Tipo: Info:eu-repo/semantics/other
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000300859
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A comparative expression analysis of gene transcripts in brain tissue of non-transgenic and GH-transgenic zebrafish (Danio rerio) using a DDRT-PCR approach Anais da ABC (AABC)
Alves-Costa,Fernanda A.; Figueiredo,Márcio A.; Lanes,Carlos F.C.; Almeida,Daniela V.; Marins,Luis F.; Wasko,Adriane P..
The presence of higher level of exogenous growth hormone (GH) in transgenic animals could lead to several physiological alterations. A GH transgenic zebrafish (Danio rerio) line was compared to nontransgenic (NT) samples of the species through a DDRT-PCR approach, with the goal of identifying candidate differentially expressed transcripts in brain tissues that could be involved in GH overexpression. Densitometric analyses of two selected amplification products, p300 and ADCY2, pointed to a significant lower gene expression in the transgenic zebrafish (104.02 ± 57.71; 224.10 ± 91.73) when compared to NT samples (249.75 ± 30.08; 342.95 ± 65.19). The present data indicate that p300 and ADCY2 are involved in a regulation system for GH when high circulating...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Differential display; GH; Growth hormone; Transgenic; Zebrafish.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200017
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A comparative study of nutritional composition and potential use of some underutilized tropical fruits of Arecaceae Anais da ABC (AABC)
SILVA,RAQUEL B.; SILVA-JÚNIOR,EDVALDO V.; RODRIGUES,LAÍS C.; ANDRADE,LAISE H.C.; SILVA,SUZENE I. DA; HARAND,WOLFGANG; OLIVEIRA,ANTONIO F.M..
In this study, pulp and kernel of fruits from six Arecaceae species were subjected to proximate analysis, fatty acid composition and total carotenoid content analysis. The species with the highest carbohydrate, lipid and protein values were Ptychosperma macarthurii(70.1 g/100 g in the kernel), Syagrus cearensis(40.6 g/100 g in the kernel), andS. coronata(20.6 g/100 g in the pulp). The ash content ranged from 0.61 to 7.51 g/100 g. Lauric, palmitic, and oleic acids were the major fatty acids identified. The total carotenoid contents and retinol activity equivalents were highest in the Pinanga kuhlii (180.3 µg/g) andAcrocomia intumescens (138.0 µg/g) pulp oils. Retinol activity equivalents varied between the investigated species (456 to 1515 μg RAE/100 g)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biomass; Foods; Oleic acid; Palm trees.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401701
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A comparative study of phytoconstituents and antibacterial activity of in vitro derived materials of four Passiflora species Anais da ABC (AABC)
J. SIMÃO,MARIELA; J.S. BARBOZA,THIAGO; G. VIANNA,MARCELA; GARCIA,RENATA; MANSUR,ELISABETH; P.R. IGNACIO,ANA CLAUDIA; PACHECO,GEORGIA.
Abstract Passiflora species are well known for their common use in popular medicine for the treatment of several diseases, such as insomnia, anxiety, and hysteria, in addition to their anti-inflammatory, antioxidant, analgesic and antibacterial potential. However, few data about the chemical composition and the medicinal potential of in vitro derived materials are available. Therefore, the goal of this work was to compare, for the first time, the phytoconstituents of in vitro derived materials of four Passiflora species, and evaluate the antibacterial potential of their extracts against 20 Gram-positive and negative strains. Chromatographic analysis indicated the presence of saponins in roots extracts from all studied species, whereas leaf extracts...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antibacterial; Chromatography; Flavonoids; Passiflora; Saponins.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602805
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A comparative study: use of a Brain-computer Interface (BCI) device by people with cerebral palsy in interaction with computers Anais da ABC (AABC)
Heidrich,Regina O.; Jensen,Emely; Rebelo,Francisco; Oliveira,Tiago.
ABSTRACT This article presents a comparative study among people with cerebral palsy and healthy controls, of various ages, using a Brain-computer Interface (BCI) device. The research is qualitative in its approach. Researchers worked with Observational Case Studies. People with cerebral palsy and healthy controls were evaluated in Portugal and in Brazil. The study aimed to develop a study for product evaluation in order to perceive whether people with cerebral palsy could interact with the computer and compare whether their performance is similar to that of healthy controls when using the Brain-computer Interface. Ultimately, it was found that there are no significant differences between people with cerebral palsy in the two countries, as well as between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brain-computer Interface (BCI); Cerebral palsy; Cognitive ergonomics; Interaction.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000501929
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