Abstract:
:Miconazole is reduced at mercury electrode above pH 6 involving organometallic compound formation, responsible for an anomalous polarographic behavior. The electrodic process presents a large contribution of the adsorption effects. The drug can be determined by cathodic stripping voltammetry from 8.0 x 10(-8) to 1, 5 x 10(-6) molL-1 in Britton-Robinson buffer pH 8.0, when pre-accumulated for 30s at an accumulation potential of 0V. A relative standard deviation of 3.8% was obtained for ten measurements of 1.0 x 10(-7) molL-1 miconazole in B-R buffer pH 8.0 and a limit detection of 1, 7 x 10(-8) molL-1 was determined using 60s of deposition time and scan rate of 100 mVs-1. The proposed method is simple, precise and it was applied successfully for the determination of the miconazole in pure form and in commercial formulations, showing mean recoveries of 99.7-98.4%.
journal_name
An Acad Bras Ciencjournal_title
Anais da Academia Brasileira de Cienciasauthors
Pereira FC,Stradiotto NR,Zanoni MVdoi
10.1590/s0001-37652002000300005subject
Has Abstractpub_date
2002-09-01 00:00:00pages
425-32issue
3eissn
0001-3765issn
1678-2690pii
S0001-37652002000300005journal_volume
74pub_type
杂志文章abstract::The objective was to evaluate the influence of calving and postpartum characteristics, measured in different genetic predominance, on the postpartum rebreeding. Were evaluated 437 partum from cows that received feeding management consisting of a forage base of the native field and the mating season consisted of 90 day...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201820171005
更新日期:2018-08-01 00:00:00
abstract::Mangroves function as a natural coastline protection for erosion and inundation, providing important environmental services. Due to their geographical distribution at the continent-ocean interface, the mangrove habitat may suffer heavy impacts from global climate change, maximized by local human activities occurring i...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201520150055
更新日期:2015-04-01 00:00:00
abstract::We used skeletochronology to compare age, size, reproductive parameters and growth patterns of two related, anuran amphibians from Northern Argentina: Leptodactylus bufonius (n=69) and L. latinasus (n=56), in order to better understand their coexistence in syntopy. Previous studies showed that the two species overlap ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3675201920180507
更新日期:2019-07-29 00:00:00
abstract::The acceleration of the anthropogenic activity has increased the atmospheric carbon concentration, which causes changes in regional climate. The Gross Primary Production (GPP) is an important variable in the global carbon cycle studies, since it defines the atmospheric carbon extraction rate from terrestrial ecosystem...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201520140457
更新日期:2015-09-01 00:00:00
abstract::Studies on belowground roots biomass have increasingly reported the importance of the contribution of this compartment in carbon stock maintenance in mangrove forests. To date, there are no estimates of this contribution in Brazilian mangrove forests, although the country has the second largest area of mangroves world...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201720160496
更新日期:2017-07-01 00:00:00
abstract::Pathogenic microbial detection and control in laboratory animal facilities is essential to guarantee animal welfare, data validity and reproducibility. Helicobacter spp. are known to affect mice health, what may interfere with experimental outcomes. This study aimed to screen for Helicobacter spp. in mice from animal ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765202020191517
更新日期:2020-01-01 00:00:00
abstract::Cynodonts represent the transition from reptiles to mammals. They are classified as synapsids, or tetrapod animals with mammalian characteristics. We present here the finding of helminth eggs in a coprolite identified as of cynodont origin dated of nearly 240 million years. Microscopy revealed the presence of very wel...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201320130036
更新日期:2014-03-01 00:00:00
abstract::In the province of Misiones (Argentina), the filling of the Yacyretá Reservoir (Argentina-Paraguay) to its final dimensions in 2011 formed new aquatic ecosystem, e.g., Garupá Stream was converted into a subreservoir. Reports have been made in this stream of adult individuals and spawning of the Family Sciaenidae, exce...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765202020180783
更新日期:2020-01-01 00:00:00
abstract::Life history traits are considered key indicators of plant invasibility. Among them, the germination behavior of seeds is of major relevance because it is influenced by environmental factors of invaded ecosystem. Here, we investigated how seed traits and seed tolerance to environmental factors on seed germination of C...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/S0001-37652013000300013
更新日期:2013-09-01 00:00:00
abstract::The study area is located in the state of Minas Gerais, Brazil, among the municipalities of Pedro Leopoldo, Matozinhos, and Sete Lagoas, with Velhas River as the eastern boundary. It is located in the São Francisco Craton, where carbonated argillo-arenaceous sediments are emplaced giving origin to the Bambuí Group, in...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201520140400
更新日期:2016-03-01 00:00:00
abstract::Amazon river turtles are increasingly threatened by habitat loss and alteration due to the Brazilian energy policy based on construction of hydroelectric dams, meanwhile, populational studies remain scarce. We described the population structure, and established body allometric relationships of Podocnemis unifilis in t...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201520140321
更新日期:2015-10-01 00:00:00
abstract::Breast cancer is the most frequent and lethal neoplastic disease among women worldwide. Psidium Guajava is a promising functional food against cancer, owing to a variety of bioactive compounds. This study aimed to evaluate the anticarcinogenic potential of Pedro Sato (PS), Hitigio (HI) and Tsumori (TS) guava cultivars...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765202020191500
更新日期:2020-01-01 00:00:00
abstract::This paper reports on total Hg concentrations in muscle tissue from 12 fish species collected in the Itacaiúnas and Parauapebas Rivers in the Carajás region, South Pará. It is found that carnivorous species present Hg concentrations higher than herbivorous and omnivorous species. Also, large carnivorous species presen...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:
更新日期:1994-01-01 00:00:00
abstract::Japanese Islands are covered with weathered volcanic rocks and soils. Terraced rice field are located in green-tuff areas which are very fertile but where landslides occur associated to strong earthquakes. The Xray diffraction and X-ray fluorescence analyses of the soils in landslide area identified predominant smecti...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/s0001-37652006000400010
更新日期:2006-12-01 00:00:00
abstract::Drought is a natural and recurrent phenomenon. It is considered 'a natural disaster' whenever it occurs in an intensive manner in highly populated regions, resulting in significant damage (material and human) and loss (socioeconomic). This paper presents the efforts developed to monitor the impact of drought in the se...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201720170209
更新日期:2019-01-01 00:00:00
abstract::Memora nodosa is popularly known as "caroba" and widely found in the Cerrado regions of Brazil. In traditional medicine, the leaves and stems are used for the healing of external ulcer and the roots for abdominal pain. This study investigated the effect of ethanolic roots extract of Memora nodosa (EMN) on the gastric ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201620150716
更新日期:2016-07-11 00:00:00
abstract::Four new N-alkyl-2-mercapto-1-octylamine hydrochlorides were synthesized via the reaction of 1,2-epithio-octane with corresponding amines following by conversion to the hydrochlorides. The disulfides were obtained by oxidation of the respective thiols. Upon biological assay of the products for activity against infecti...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:
更新日期:1986-12-01 00:00:00
abstract::Establishment of infection by Trypanosoma cruzi, the agent of Chagas' disease, depends on a series of events involving interactions of diverse parasite molecules with host components. Here we focus on the mechanisms of target cell invasion by metacyclic trypomastigotes (MT) and mammalian tissue culture trypomastigotes...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章,评审
doi:10.1590/s0001-37652006000100010
更新日期:2006-03-01 00:00:00
abstract::Goniopsis cruentata is a common semi-terrestrial crab in Brazilian mangroves and an important fishery resource for traditional communities in the northeastern Brazilian coast. Aiming to contribute to the knowledge about the species, this study evaluated the carapace width and weight growth curves, the relative growth ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201520130387
更新日期:2015-04-01 00:00:00
abstract::The aim of this study was to evaluate potential DNA damage and cytotoxicity in pathology laboratory technicians exposed to organic solvents, mainly xylene. Peripheral blood and buccal cells samples were collected from 18 technicians occupationally exposed to organic solvents and 11 non-exposed individuals. The technic...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201620150194
更新日期:2016-03-01 00:00:00
abstract::The aim of this study was to evaluate the effect of phosphorus (P) on the toxicity of zinc (Zn) for the alga Raphidocelis subcapitata. P was provided in three concentrations: 2.3 x 10-4 mol L-1, 2.3 x 10-6 mol L-1 and 1.0 x 10-6 mol L-1. Algal cells were acclimated to the specific P concentrations before the start of ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765202020190050
更新日期:2020-11-06 00:00:00
abstract::This study presents paleoenvironmental data based on pollen, elemental and isotopic compositions of organic matter (TOC, N, δ(13)C and δ(15)N) and (14)C dating of 170 cm lake sediment record. Samplings have been made in Lagoa Grande at Parque Estadual Turístico do Alto Ribeira - PETAR, Southern São Paulo State, Southe...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/s0001-37652010000300019
更新日期:2010-09-01 00:00:00
abstract::The genera Hemigrammus and Moenkhausia have been traditionally diagnosed mainly by the former having lateral line completely pored whereas the latter having a lateral line with a few pored scales. Those features have been used to diagnose species of both genera in the upper Paraná River floodplain. Specimens with the ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201820170493
更新日期:2018-07-01 00:00:00
abstract::Twenty-two nitrogen-fixing Bacillus azotofixans strains were shown to produce an inhibition zone against themselves in plate assays. The B. azotofixans type strain P3L-5, chosen for further studies, produced inhibition zones against various Bacillus strains and other bacterial genera. This antibacterial substance was ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:
更新日期:1990-03-01 00:00:00
abstract::Intensification of aquaculture production systems exposes fish to numerous stressors, which may negatively affect their growth and limit profitability of aquaculture systems. This study determined effects of increasing levels of dietary mannanoligosaccharides on growth and intestine morphology of pacu. Fish (44.04 g) ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201420130088
更新日期:2014-09-01 00:00:00
abstract::The Commelina erecta L. (C. erecta) also known as erva-de-santa-luzia is reported by local population to have medical properties against some pathological conditions. In this study, two extracts of C. erecta leaves (aqueous and ethanolic) were phytochemically analysed and evaluated for their in-vitro antioxidant activ...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765202020190491
更新日期:2020-01-01 00:00:00
abstract::The objective of this study was to investigate the effects of 2% L-glutamine supplementation on myenteric innervation in the ileum of diabetic rats, grouped as follows: normoglycemic (N); normoglycemic supplemented with L-glutamine (NG); diabetic (D); and diabetic supplemented with L-glutamine (DG). The ileums were su...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201620150228
更新日期:2016-01-01 00:00:00
abstract::Leishmania amazonensis is the main agent of diffuse cutaneous leishmaniasis, a disease associated with anergic immune responses. In this study we show that the crude antigen of Leishmania amazonensis (LaAg) but not L. braziliensis promastigotes (LbAg) contains substances that suppress mitogenic and spontaneous prolife...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/s0001-37652004000300006
更新日期:2004-09-01 00:00:00
abstract::This work describes the chemical composition and antimicrobial activity of the volatile oils of Ocimum canum and Ocimum selloi, both occurring in Jequié/BA, northeastern Brazil. The plants were collected in the winter/2005 and summer/2006, the oils extracted by steam distillation and further analyzed by GC-MS. A total...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/s0001-37652011005000019
更新日期:2011-09-01 00:00:00
abstract::Two experiments (E) were carried out to evaluate the effects of fumaric acid and an acidifier blend [composed by calcium formate, calcium lactate and medium-chain fatty acids (capric and caprylic)] in piglet diets containing colistin (40 ppm) or halquinol (120 ppm) on performance, diarrhea incidence (E1), organs relat...
journal_title:Anais da Academia Brasileira de Ciencias
pub_type: 杂志文章
doi:10.1590/0001-3765201820160057
更新日期:2018-02-19 00:00:00