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| Registros recuperados: 36 | |
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| Domingues,Douglas Silva; Leite,Susi Meire Maximino; Farro,Ana Paula Cazerta; Coscrato,Virgínia Elias; Mori,Edson Seizo; Furtado,Edson Luiz; Wilcken,Carlos Frederico; Velini,Edivaldo Domingues; Guerrini,Iraë Amaral; Maia,Ivan Godoy; Marino,Celso Luis. |
| Boron (B) is a low mobility plant micronutrient whose molecular mechanisms of absorption and translocation are still controversial. Many factors are involved in tolerance to Boron excess or deficiency. Recently, the first protein linked to boron transport in biological systems, BOR1, was characterized in Arabidopsis thaliana. This protein is involved in boron xylem loading and is similar to bicarbonate transporters found in animals. There are indications that BOR1 is a member of a conserved protein family in plants. In this work, FORESTS database was used to identify sequences similar to this protein family, looking for a probable BOR1 homolog in eucalypt. We found five consensus sequences similar to BOR1; three of them were then used in multiple alignment... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Boron; Xylem loading; Expressed Sequence Tag (EST); BOR1. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000400017 |
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| Chalk, T. B.; Foster, G. L.; Wilson, P. A.. |
| The origin and carbon content of the deep water mass that fills the North Atlantic Basin, either Antarctic Bottom Water (AABW) or North Atlantic Deep Water (NADW) is suggested to influence the partitioning of CO2 between the ocean and atmosphere on glacial-interglacial timescales. Fluctuations in the strength of Atlantic meridional overturning circulation (AMOC) have also been shown to play a key role in global and regional climate change on timescales from annual to millennial. The North Atlantic is an important and well-studied ocean basin but many proxy records tracing ocean circulation in this region over the last glacial cycle are challenging to interpret. Here we present new B/Ca-[CO32-] and boron isotope-pH data from sites spanning the North... |
| Tipo: Text |
Palavras-chave: Boron; Geochemistry; Palaeoceanography; Carbonate system; Glacial; Atlantic. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00496/60812/64631.pdf |
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| Bustos-Obregon,E; Carvallo,M; Hartley-Belmar,R; Sarabia,L; Ponce,C. |
| Boron is a chemical element widely used in many industrial activities. Exposure to it affects many organs in mammals, mainly reproductive male organs. This work evaluates boron effect in testis. For this purpose, 12mg Boron/L of drinking water, equivalent to Arica tap water, was given for 42 days to 85 days old CFl male mice (experimental group). Another group (control group) drunk tap water of Santiago (0.6mg Boron/L) was used. Testicular histopathology and morphometric analysis was done. These studies showed that Borum induces alterations such as epithelial vacuolization, blockage of the tubular lumen and atrophy. Morphometrical data showed that Borom induces also enlargement of tubular diameter, epithelial height and tubular lumen. Therefore, it is... |
| Tipo: Journal article |
Palavras-chave: Boron; Testicular histopathology; Morphometry; Mouse spermatogenesis. |
| Ano: 2007 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022007000400039 |
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| Sun,PengPeng; Luo,You; Wu,Xin Tong; Ansari,Abdur Rahman; Wang,Jing; Yang,KeLi; Xiao,Ke; Peng,KeMei. |
| Boron is an essential trace element which plays an important role in process of metabolism and the function of the tissues. However, the effects of boron on the intestinal cells in African ostrich chicks are poorly reported. Therefore, this study was designed to investigate the role of boron on proliferation and apoptosis of the intestinal cells. A total of 36, ten day-old ostrich chicks were randomly divided into six groups and fed on the same basal diet supplemented with 0, 40, 80, 160, 320 and 640 mg/L boric acid in drinking water for 80 days. Proliferatingcell nuclearantigen (PCNA) wasused to test the proliferation indexof intestine in different group byimmunohistochemicalstaining (IHC). Apoptoticcellsofintestinewere detectedbyDutp-biotin nick end... |
| Tipo: Journal article |
Palavras-chave: Apoptosis; Boron; Intestine; Ostrich chicks; Proliferation. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300002 |
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| Bustos-Obregón,Eduardo; Olivares,Christopher. |
| It has been reported that boron causes changes in various systems, including the male reproductive system. Residents in some towns in northern Chile were consuming a few years ago in the drinking water 20 times more than the amount established as permissible limit by WHO. This study evaluates the effects in an animal model of high intake of boron on the testis. Boron was administered in the drinking water. Twenty male mice (Mus domesticus), sexually mature, were used, divided into 2 groups: the experimental group was given Boron at a dose of 12 mg/L, and the control group 0.6 mg/L, for 42 days. Sections of testis were obtained for: HE staining (Morphometry and Histopathology), Immunohistochemistry (Cox-2), Mallory and Picrosirious stain (evaluation of... |
| Tipo: Journal article |
Palavras-chave: Boron; Mouse; Testicular structure; Collagen I/III; Infertility. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000300057 |
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| Bustos-Obregón,Eduardo; Hartley Belmar,Ricardo; Catriao-Gálvez,Roberto. |
| Boron is a non-metal element, commonly found in Nature as borates in sedimentary rocks, charcoal, oceans and soils. In Chile, it is found in high concentrations in the drinkable water of the XV region, in Arica city, in concentrations that exceed the WHO normative. The present work evaluates the effect of boron at a dose of 12 mg/L of water (equivalent to 0.0686 g of boric acid) given orally for 8,42 and 49 days to 3 experimental groups of 10 mice each. Liver sections were stained with PAS-hematoxyline (to evaluate glycogen), Mallory (to identify collagen fibers) and Picrosirius red with polarizing light to classify collagen fibers. Results indicate that boron evokes diverse effects in liver. Binucleated cells were evaluated and counted and results were... |
| Tipo: Journal article |
Palavras-chave: Boron; Mouse liver; Glycogen Deposition; Collagen quality. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000100026 |
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| Espinoza-Navarro,O; Rodríguez,H; Rodríguez,M; Silva,E; Luque,A. |
| The objective of this study was to evaluate the effects of boron (B) using as a biological model Drosophila malanogaster. Analizing specifically the responses over descendency to doses of 6,0 and 12 mg/L, comparing a control group which culture medium was prepared with water with boron concentrations of 0,6 mg/L, according to World Health Organization. The results show a significative alteration in the number of descendency from F1 to F3 and then a tendency to normalization in F4 and F5. Also a significant change in proportions between the males and females, with an acute effect on F1 and then a possible chronic effect from F2 to F5, increasing the proportion of females over males. This differences between genders are significant only until F4, on F5 these... |
| Tipo: Journal article |
Palavras-chave: Reproduction; Boron; Reproductive toxicology; Drosophila melanogaster. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000300021 |
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| Hakan,KB; Gultekin,Y; Ozge,S. |
| In this study, the effects of boric acid and humate supplementation into hen diets on egg production and quality parameters and blood cholesterol levels were examined. For this aim, totally 160, 40 weeks of age, Hyline-White 98 layers were randomly divided into control and 3 treatment groups each containing 40 birds and 10 replicates (each with 4 birds). There was no boric acid or humate supplementation to control group diets (basal diet) where as treatment groups were supplemented with (basal diet plus) 90 ppm boric acid or 1 g/kg humate, or combination of these two feed additives, respectively. The experimental period lasted in 14 weeks. End of the trial there were no significant effects of dietary boric acid and humate inclusion on feed intake, egg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Boron; Egg production and quality; Humic substance; Performance. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2012000400008 |
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| Fassani,EJ; Bertechini,AG; Brito,JAG; Kato,RK; Fialho,ET; Geraldo,A. |
| Boron supplementation in broiler feed is not a routine practice. However, some reports suggest a positive effect of boron on performance. This study assessed the effects of boron supplementation on broiler performance. Diets were based on maize and soybean meal, using boric acid P.A. as boron source. Six supplementation levels (0, 30, 60, 90, 120 and 150 ppm) were evaluated using 1,440 one-day old males housed at a density of 30 chickens in each of 48 experimental plots of 3m². A completely randomized block design was used with 8 replicates. Feed intake, weight gain and feed conversion were assessed in the periods from 1 to 7 days, 1 to 21 days and 1 to 42 days of age, and viability was evaluated for the total 42-day rearing period. No performance variable... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal nutrition; Boron; Broiler; Chicken; Performance. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2004000400004 |
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| Registros recuperados: 36 | |
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