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Brazilian Journal of Biology, Revista Brasleira de Biologia

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https://read.qxmd.com/read/30652734/in-vivo-induction-of-hepatocellular-carcinoma-by-diethylnitrosoamine-and-pharmacological-intervention-in-balb-c-mice-using-bergenia-ciliata-extracts
#1
K K Dar, S Ali, M Ejaz, S Nasreen, N Ashraf, S F Gillani, N Shafi, S Safeer, M A Khan, S Andleeb, T A Mughal
BACKGROUND: Hepatocellular carcinoma is the most frequent primary malignancy of liver and accounts for as many as one million deaths worldwide in a year. OBJECTIVES: The aim of the present study was to evaluate the anti-cancerous efficiency of Bergenia ciliata rhizome against diethylnitrosoamine induced hepatocarcinogenesis in Balb C mice. METHODS: One percent diethylnitrosoamine was prepared by using 99 ml of normal saline NaCl (0.9 percent) solution to which was added 1 ml of concentrated diethylnitrosoamine (DEN) solution (0...
January 14, 2019: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30569946/erratum-fish-consumption-on-the-amazon-a-review-of-biodiversity-hydropower-and-food-security-issues
#2
(no author information available yet)
[This corrects the article doi: 10.1590/1519-6984.186572].
December 13, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30540104/variation-in-the-prevalence-and-abundance-of-acanthocephalans-in-brown-nosed-coatis-nasua-nasua-and-crab-eating-foxes-cerdocyon-thous-in-the-brazilian-pantanal
#3
A P N Gomes, A Maldonado Júnior, R C Bianchi, J G R Souza, P S D'Andrea, M E Gompper, N Olifiers
Host infection by parasites is influenced by an array of factors, including host and environmental features. We investigated the relationship between host sex, body size and age, as well as seasonality on infection patterns by acanthocephalan in coatis (Procyonidae: Nasua nasua) and in crab-eating foxes (Canidae: Cerdocyon thous ) from the Brazilian Pantanal wetlands. Between 2006 and 2009, we collected faecal samples from these hosts and analyzed for the presence of acanthocephalan eggs. Prevalence, abundance and intensity of eggs of acanthocephalans were calculated...
December 10, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30540103/parasitoids-diversity-in-organic-sweet-pepper-capsicum-annuum-associated-with-basil-ocimum-basilicum-and-marigold-tagetes-erecta
#4
I L Souza, V B Tomazella, A J N Santos, T Moraes, L C P Silveira
The sweet pepper (Capsicum annuum L.) is one of the most important crops in Brazilian farming. Many insect are related to this crop, compromising the quantity and quality of the fruit, representing a production problem. Vegetable diversification is one of the main elements that can be managed for suppressing undesirable insect populations in organic production, once that supports the presence of natural enemies. The basil Ocimum basilicum L. and the marigold Tagetes erecta L. are attractive and nutritious plants for parasitoids, being important candidates for diversified crops...
December 10, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30517276/protists-and-other-organisms-on-a-minute-snail-periostracum
#5
A López de la Fuente, R J Urcuyo, G H Vega
Since the foundation of the Malacological Center in 1980, Universidad Centro Americana (UCA), Managua-Nicaragua, has been monitoring and collecting the marine, terrestrial, fluvial and lake mollusk population of the country. Many specimens have been photographed by Scanning Electronic Microscope (SEM), and in one of these, observation of the hairy periostracum reveals a seemingly thriving population of minute protists in possible symbiosis with their host. Adequate magnification and comparison with previous studies allowed the determination of these hosts as diatoms, testaceous amoebae, yeast, phacus, spores and other undetermined organisms which occur in tropical forests on rocks, trees and leaves...
December 3, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30726453/impact-of-phosphate-solubilizing-bacteria-on-wheat-triticum-aestivum-in-the-presence-of-pesticides
#6
I Munir, A Bano, M Faisal
Three phosphate solubilizing bacteria were isolated and identified by 16S rRNA sequencing as Pseudomonas putida, Pseudomonas sp and Pseudomonas fulva . The strains were subjected to plant biochemical testing and all the PGPR attributes were checked in the presence of pesticides (chlorpyrifos and pyriproxyfen). The phosphate solubilizing index of strain Ros2 was highest in NBRIP medium i.e 2.23 mm. All the strains showed acidic pH (ranges from 2.5-5) on both medium i.e PVK and NBRIP. Strain Ros2 was highly positive for ammonia production as well as siderophore production while strain Rad2 was positive for HCN production...
January 2019: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30484478/reproductive-ecology-of-otocinclus-vittatus-regan-1904-in-the-pantanal-floodplain-upper-paraguay-river-basin
#7
M J Pereira, Y R Súarez
We studied the reproductive biology of Otocinclus vittatus in the southern Pantanal, Brazil. A total of 1066 fishes were analyzed (490 males, 488 females and 88 individuals of undetermined sex), sampled with a rectangular sieve and a seine net from February/2009 to January/2011. Variations in the sex ratio, seasonality in reproduction, fecundity, and size at first maturity were estimated. No variations were detected in the total sex ratio for the study period as a whole; although ratio has varied over time...
November 23, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30484477/trichospilus-diatraeae-hymenoptera-eulophidae-development-and-reproduction-in-lepidoptera-palm-oil-pests
#8
R C Ribeiro, T G Pikart, H A Fouad, M C Parreira, J C Zanuncio, M A Soares, V R Castro
Brazil is a leading palm oil producer, but the defoliating caterpillars Opsiphanes invirae Hübner Brassolis sophorae L. (Lepidoptera: Nymphalidae) can reduce the productivity of this crop. The aim of this study was to evaluate the development and reproduction of the parasitoid Trichospilus diatraeae Cherian & Margabandhu (Hymenoptera: Eulophidae) in pupae of these oil palm defoliators. Ten O. invirae or B. sophorae pupae with up to two days old were exposed each to 30 T. diatraeae females for 48 hours...
November 23, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30484476/biochemical-identification-techniques-and-antibiotic-susceptibility-profile-of-lipolytic-ambiental-bacteria-from-effluents
#9
A F G Rave, A V Kuss, G H S Peil, S R Ladeira, J P V Villarreal, P S Nascente
Different methodologies have been developed throughout the years to identify environmental microorganisms to improve bioremediation techniques, determine susceptibility profiles of bacteria in contaminated environments, and reduce the impact of microorganisms in ecosystems. Two methods of bacterial biochemical identification are compared and the susceptibility profile of bacteria, isolated from residential and industrial wastewater, is determined. Twenty-four bacteria were retrieved from the bacteria bank of the Environmental Microbiology Laboratory at the Institute of Biology (IB) of the Universidade Federal de Pelotas, Pelotas, Brazil...
November 23, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30462817/women-and-science-a-portrait-of-herpetology-in-the-state-of-piau%C3%A3
#10
R A Benício, M G Fonseca
No abstract text is available yet for this article.
November 14, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30462816/first-report-of-crocidosema-epinotia-cosmoptila-meyrick-1917-lepidoptera-tortricidae-in-brazil
#11
O C Bortolotto, S B C Lustosa, F Pacentchuk
No abstract text is available yet for this article.
November 14, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30462815/antibacterial-and-antiproliferative-activities-of-the-fresh-leaf-essential-oil-of-psidium-guajava-l-myrtaceae
#12
E A J Silva, E B B Estevam, T S Silva, H D Nicolella, R A Furtado, C C F Alves, E L Souchie, C H G Martins, D C Tavares, L C A Barbosa, M L D Miranda
This study evaluated the antibacterial and antiproliferative activities of the essential oil of Psidium guajava leaves (PG-EO), traditionally used in folk medicine. The essential oil was obtained from fresh leaves by hydrodistillation, using a modified Clevenger apparatus. The major PG-EO chemical constituents were identified by GC-MS and GC-FID as being β-caryophyllene (16.1%), α-humulene (11.9%), aromadendrene oxide (14.7%), δ-selinene (13.6%), and selin-11-en-4α-ol (12.5%). The antibacterial activity of the essential oil of P...
November 14, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30462814/dynamics-of-vegetation-structure-in-a-fragmented-landscape-in-minas-gerais-brazil
#13
N V Salomão, M D D Silva, E L M Machado
Considering that area and edge effects are the most important factors that lead to landscape changes from the fragmentation of terrestrial communities, the present study aimed to analyze changes in the structure of vegetation classes of a fragmented landscape. The methodology employed was based on a model of patch dynamics for the years between 1979 and 2015. The analysis was performed with quantitative (area, shape and edge effect) and qualitative (low declivity of the terrain, fire resistance and tolerance to variation in light) variables of the classes of vegetation...
November 14, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30462813/genotoxicity-effects-on-geophagus-brasiliensis-fish-exposed-to-doce-river-water-after-the-environmental-disaster-in-the-city-of-mariana-mg-brazil
#14
L C Gomes, A R Chippari-Gomes, T O Miranda, T M Pereira, J Merçon, V C Davel, B V Barbosa, A C H Pereira, A Frossard, J P L Ramos
The Doce River basin has suffered the largest environmental accident ever occurred in Brazil with the influx of tailings from Fundão and Santarém, belonging to Samarco mining company, due to the disaster in Mariana. A spill between 50 and 60 million m3 of tailings was estimated by the company. According to Samarco, the wastewater was composed mainly of clay, silt and heavy metals like iron, copper and manganese. Thereby, the objective of the present study was evaluated the genotoxic damage in juvenile of Geophagus brasiliensis (Quoy e Gaimard, 1824) exposed to Doce river water before (DRWBA - Doce River water before acident) and after (DRWAA - Doce River water after acident) the influx of tailings from the Germano and Santarém Dam disasters in Mariana, MG, Brazil...
November 14, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30462812/morphobiological-morphometric-and-ultrastructural-characterization-of-sylvatic-trypanosoma-cruzi-isolates-from-rio-de-janeiro-state-brazil
#15
C Santos da Silva, A L Carbajal-de-la-Fuente, C E Almeida, T C M Gonçalves, J Reis Dos Santos-Mallet
Triatoma vitticeps is a triatomine with geographic distribution restrict to Brazil, which exhibits high prevalence of Trypanosoma cruzi natural infection. Of special epidemiologic concern, this species often invades households in the states of Rio de Janeiro, Minas Gerais and Espírito Santo. The objective of this study was to evaluate morphological and ultrastructural parameters on three T. cruzi isolates obtained from wild T. vitticeps specimens. The growth and cell differentiation of the parasite was evaluated through epimastigote and trypomastigote forms obtained in the growth curves for three distinct isolates...
November 14, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30427384/fruit-availability-at-the-individual-and-local-levels-influences-fruit-removal-in-cecropia-pachystachya
#16
A B Navarro, A A A Bovo, E R Alexandrino, V C Oliveira, M A Pizo, K M P M B Ferraz
No abstract text is available yet for this article.
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30427383/ecotoxicological-risk-assessment-due-to-the-presence-of-bisphenol-a-and-caffeine-in-surface-waters-in-the-sinos-river-basin-rio-grande-do-sul-brazil
#17
G P Peteffi, J D Fleck, I M Kael, D C Rosa, M V Antunes, R Linden
Bisphenol A (BPA) is an emerging contaminant, regularly detected in aquatic ecosystems, considered as an endocrine disrupting compound (EDC). Caffeine is another chemical related to human activity, often found in surface waters. The objective of this study was to evaluate the ecotoxicological risk due to BPA and caffeine in water samples from the Sinos River basin, Rio Grande do Sul, Brazil. Water samples were collected at three sites monthly from May 9 th, 2016 to April 11th, 2017 (n = 36). BPA concentrations in water samples collected were in the range of not detected to 517 ng L-1 and caffeine concentrations in the range of 41...
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30427382/determination-of-acute-toxicity-of-ammonium-in-juvenile-patagonian-blenny-eleginops-maclovinus
#18
A Mardones, M González, C Rivas-Mancilla, R Vega, A Augsburger, F Encina, P De Los Ríos
Deionized ammonium (NH3) acute toxicity (LC50-96h) in Patagonian blenny juveniles (Eleginops maclovinus) was assessed. Concentrations of deionized ammonium in salt water were prepared by using 24.09 ± 2.1 g ammonium chloride (NH4Cl). Fish were exposed in triplicates to different ammonium concentrations: 0.05; 0.094; 0.175; 0.325 and 0.605 mg NH3 L-1. Additionally, a control group was included. Experimental fish were kept at a photoperiod of 16:8h. Average temperatures were 16.24 ± 1.40 °C. Oxygen concentration was 7...
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30427381/accidentally-catching-of-the-catfish-lophiosilurus-alexandri-steindachner-1876-larvae-in-aquariums-with-different-colors
#19
M M Pedreira, D C Costa, M Schorer
The aim of this study was to evaluate the effect of different colors in development and survival of catfish Lophiosilurus alexandri larvae, as well as over the visual ability of the handler. Larvae were placed in 5 L-aquariums at a density of 7 larvae L-1 , and aquariums had different colors, and were: green and blue (light colors); brown and black (dark colors). The final development; survival, total and standard length, weight and biomass of the larvae were similar in all colored aquaria. The highest mortality occurred during the first days after hatching, declining over the period, when it is observed the larval development, indicating that care should be necessary in the first few days...
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://read.qxmd.com/read/30427380/toxicity-bioassay-and-sub-lethal-effects-of-diazinon-on-blood-profile-and-histology-of-liver-gills-and-kidney-of-catfish-clarias-gariepinus
#20
A M Al-Otaibi, H F A Al-Balawi, Z Ahmad, E M Suliman
The catfish, Clarias gariepinus, was exposed to different acute concentrations (5-10 mg/l) of diazinon and the Lc50 value was recorded as high as 7.3 mg/l for 96 hours. The fishes exposed to three sub-lethal levels of diazinon (0.73, 1.095 and 1.46 mg/l) for 30 days showed that the pesticide induces changes in different blood parameters. Number of red blood cells (RBC), haemoglobin level and haematocrit values were elevated whereas white blood cells (WBC) count was reduced. Various blood indices like mean corpuscular volume (MCV), mean corpuscular haemoglobine (MCH) and mean corpuscular haemoglobine concentration (MCHC) vary insignificantly in the fish treated with diazinon...
November 8, 2018: Brazilian Journal of Biology, Revista Brasleira de Biologia
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