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1.
Article | IMSEAR | ID: sea-218493

ABSTRACT

Introduction: Dentigerous cysts are the second most common developmental odontogenic cysts of the jaw, arising from im- pacted, embedded or unerupted permanent teeth. They apparently develop by accumulation of fluid between the reduced enamel epithelium and the tooth crown of an unerupted tooth. There is usually no pain or discomfort associated with the cyst unless there is an acute inflammatory exacerbation. Case Presentation: The purpose of this case report is to present a case of a dentigerous cyst with an unusual presentation in a 6-year-old child came with the swelling over right back region of the jaw which was asymptomatic appearing bony hard on palpation. Radiography showing unilocular radiolucency with an unerupted mandibular tooth crown is seen. Histology re- vealed H & E-stained section showing non keratinized epithelium 2-3 cell layer thick underlying connective tissue wall is loose fibrocellular with mild to moderate inflammatory cells infiltrate comprising of plasma cells, lymphocytes & numerous blood vessels and the definitive diagnosis of Dentigerous cyst was made. Management is done using enucleation of the cystic space with curettage & extraction of associated teeth. Conclusion: Management of odontogenic lesions, such as dentigerous cysts in children, presents an unparalleled challenge to general and pediatric dentists alike. A thorough understanding of the nature of the lesion backed by good clinical history and state-of-art radiography can go a long way in helping the clinician to arrive at the correct therapeutic choice of approach, ameliorate the condition in the best long-term interests of the young patient.

2.
Arq. bras. med. vet. zootec. (Online) ; 73(2): 543-549, Mar.-Apr. 2021. tab
Article in English | LILACS, VETINDEX | ID: biblio-1248918

ABSTRACT

O objetivo deste estudo foi avaliar o balanço de nitrogênio e a concentração de ureia no plasma em cabritos alimentados com dietas contendo farinha de pupunha em substituição ao milho (0, 10, 40, 60 e 85% MS). Trinta cabritos Boer × SRD, com 90 dias de idade e peso corporal inicial de 16,7 ± 3,5kg, foram distribuídos em um delineamento inteiramente ao acaso, com seis repetições. As dietas foram fornecidas diariamente ad libitum para permitir 10% das sobras. Três coletas foram realizadas a cada 28 dias. As dietas foram constituídas por milho, farelo de soja, farinha de pupunha, suplemento mineral e feno de Tifton-85, com a relação volumoso: concentrado de 30:70. O consumo de nitrogênio (N) diminuiu linearmente à medida que a farinha de pupunha substituiu o milho no concentrado. Com relação ao N digerido, os animais alimentados com níveis de farinha de pupunha apresentaram valores inferiores aos alimentados com o milho como única fonte de energia, com médias de 14,9 e 17,1g dia-1, respectivamente. A excreção urinária de N diminuiu à medida que a farinha de pupunha substituiu o milho no concentrado. O nível de 39% de farinha de pupunha reduziu a excreção urinária de ureia. Houve retenção máxima de N em 7,83g dia-1 para o nível de substituição de milho de 28,9% em farinha de pupunha.(AU)


Subject(s)
Animals , Blood Urea Nitrogen , Ruminants/metabolism , Arecaceae , Industrial Waste , Animal Feed/analysis
3.
Arq. bras. med. vet. zootec. (Online) ; 72(3): 895-900, May-June, 2020. ilus
Article in English | LILACS, VETINDEX | ID: biblio-1129565

ABSTRACT

An adult, female, 31kg body weight, free range Myrmecophaga tridactyla was referred for medical consultation due to apathy, dehydration, intense flatulence and fetid stools. The animal was submitted to chemical restraint and physical examination, blood count, fecal analysis, and vaginal cytology and abdominal ultrasonography were performed. Good nutritional status and clinical variables within the normal range were observed at physical examination. At vaginal cytology leukocytes, spermatozoa and a large proportion of cornified cells (superficial) were observed, indicating estrus and recent copula. At ultrasound examination it was possible to locate, identify, evaluate and measure the ovaries and the uterine structures, cervix, body, lumen, myometrium and endometrium, a fact never reported in the literature for this species. These data can be used as reference for clinical evaluation of the reproductive tract in Myrmecophaga tridactyla females considered vulnerable species, for the diagnosis of reproductive pathologies, biotechnologies application or estrous cycle evaluation.(AU)


Uma fêmea, com 31kg de peso corporal, de Myrmecophaga tridactyla, de vida livre, foi apresentada para consulta médica em razão de apatia, desidratação, flatulência intensa e fezes fétidas. O animal foi submetido à contenção química e foram realizados exame físico, hemograma, análise fecal, citologia vaginal e ultrassonografia abdominal. Ao exame físico, foi determinado bom estado nutricional e variáveis clínicas dentro da faixa de normalidade. Na citologia vaginal, foram observados leucócitos, espermatozoides e uma grande proporção de células cornificadas (superficiais), indicando estro e cópula recente. No exame ultrassonográfico, foi possível localizar, identificar, avaliar e mensurar os ovários e as estruturas uterinas, o colo do útero, o corpo do útero, o lúmen, o miométrio e o endométrio, fato nunca relatado na literatura para essa espécie. Esses dados podem ser utilizados como referência para avaliação clínica do trato reprodutivo de fêmeas de Myrmecophaga tridactyla considerada espécie vulnerável, para o diagnóstico de patologias reprodutivas, aplicação de biotecnologias ou avaliação do ciclo estral.(AU)


Subject(s)
Animals , Female , Ovary/diagnostic imaging , Uterus/diagnostic imaging , Xenarthra/anatomy & histology , Genitalia/diagnostic imaging , Ultrasonography/veterinary , Estrous Cycle
4.
Braz. j. biol ; 79(4): 659-664, Nov. 2019. tab, graf
Article in English | LILACS | ID: biblio-1001473

ABSTRACT

Abstract 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. For this, 24 individuals of the species G. brasiliensis (obtained on IFES/ALEGRE fish culture) were submitted to a bioassay with three treatments and eight replicates. The treatments were: 1) Control water (water from the urban water supply system, filtered with a 0.45 µm membrane), 2) DRBA and 3) DRAA. After 96 h, these fishes were anesthetized to remove blood for evaluation of genotoxic damage (micronucleus and comet). For the bioassay, a total of 80 L of The Doce River water were collected before the influx of tailings and after the influx and then submitted to metal quantification analysis. Fish exposed to DRWBA and DRWAA treatments showed a significant increase in both the number of erythrocyte micronuclei and the DNA damage index in relation to the control fish; however, they did not present any differences between the two treatments. The results demonstrate that the DRWBA treatment was already genotoxic for the fish, mainly due to dissolved Cu concentrations in the water. The DRWAA treatment probably presented genotoxicity due to the increase in the dissolved fraction and synergistic effects of several metals found in the tailings of the Mariana accident.


Resumo A bacia do Rio Doce sofreu o maior acidente ambiental com o influxo de rejeitos de Fundão e Santarém, pertencentes à empresa de mineração Samarco, devido ao desastre em Mariana. Um derramamento entre 50 e 60 milhões de m3 de rejeitos foi estimado pela empresa. De acordo com a Samarco, o rejeito despejado era composto principalmente de argila, silte e alguns metais pesados como ferro, cobre e manganês. Com isso, o presente estudo teve como objetivo avaliar os danos genotóxicos em juvenis de Geophagus brasilienses expostos a água do rio Doce antes (DRWAA - água do Rio Doce antes do acidente) e depois (DRWBA- água do Rio Doce depois do acidente) da chegada dos rejeitos do rompimento das barragens de Germano e Santarém em Mariana, MG, Brasil. Para isso, 24 indivíduos da espécie G. brasilienses (obtidos na piscicultura do IFES/ALEGRE) foram submetidos a um bioensaio com três tratamentos e oito réplicas. Os tratamentos eram: 1) Controle (com água do abastecimento urbano, filtrada com filtro analítico de 0,45 µm); 2) DRWBA e 3) DRWAA. Após um período de 96 h, esses peixes foram anestesiados para retirada de sangue para avaliação dos danos genotóxicos (micronúcleo e cometa). Para a realização do bioensaio, um total de 80 L de água do Rio Doce foram coletados antes da chegada dos rejeitos e outros 80 L foram coletados depois da chegada dos rejeitos e ambas foram submetidas a análises de quantificação de metal. Os peixes expostos ao DRWBA e ao DRWAA apresentaram um aumento significativo na quantidade de micronúcleos eritrocitários e no índice de danos do DNA em relação aos peixes controle, no entanto não apresentaram diferenças entre si. Os resultados obtidos demonstram que a DRWBA já era genotóxica para os peixes, principalmente, em função das concentrações de Cu dissolvido na água. A DRWAA apresentou genotixicidade, provavelmente, em função do aumento da fração dissolvida e do efeito sinérgico de diversos metais presentes nos rejeitos do acidente de Mariana.


Subject(s)
Animals , DNA Damage/drug effects , Metals, Heavy/analysis , Metals, Heavy/classification , Cichlids/physiology , Cichlids/genetics , Disasters , Water Pollutants, Chemical/analysis , Water Pollutants, Chemical/classification , Water Pollutants, Chemical/toxicity , Brazil , Environmental Monitoring/methods , Metals, Heavy/toxicity , Rivers/chemistry , Fresh Water/chemistry , Mining
5.
Article | IMSEAR | ID: sea-196176

ABSTRACT

Odontogenic tumors constitute a wide spectrum of lesions ranging from malignant and benign neoplasms to dental hamartomas, all derived from the epithelial and ectomesenchymal remnants of the tooth forming apparatus. Calcifying epithelial odontogenic tumor (CEOT) is an uncommon, benign epithelial odontogenic tumor first described by Pindborg in 1956. It is a universally accepted eponym for this neoplasm. Pindborg tumor or CEOT is a locally aggressive neoplasm that accounts for 1% of the total odontogenic tumors, with recurrence in 14% of cases. The etiology of this tumor remains an enigma to the clinician. Pindborg suggested that the tumor arises from the remnants of reduced enamel epithelium of an unerupted tooth. Recent studies in literature report that the tumor arises from stratum intermedium. We report a case of Pindborg tumor in a 22-year-old male patient in the left mandibular posterior region. Radiographically, a well-defined radiolucency was associated with unerupted mandibular second molar which was displaced to the inferior border of the mandible. Along with routine haematoxylin and eosin stains, this case reports histopathological findings using Congo red stain and modified Gallegos stain.

6.
Article in English | LILACS-Express | LILACS, VETINDEX | ID: biblio-1467242

ABSTRACT

Abstract 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. For this, 24 individuals of the species G. brasiliensis (obtained on IFES/ALEGRE fish culture) were submitted to a bioassay with three treatments and eight replicates. The treatments were: 1) Control water (water from the urban water supply system, filtered with a 0.45 µm membrane), 2) DRBA and 3) DRAA. After 96 h, these fishes were anesthetized to remove blood for evaluation of genotoxic damage (micronucleus and comet). For the bioassay, a total of 80 L of The Doce River water were collected before the influx of tailings and after the influx and then submitted to metal quantification analysis. Fish exposed to DRWBA and DRWAA treatments showed a significant increase in both the number of erythrocyte micronuclei and the DNA damage index in relation to the control fish; however, they did not present any differences between the two treatments. The results demonstrate that the DRWBA treatment was already genotoxic for the fish, mainly due to dissolved Cu concentrations in the water. The DRWAA treatment probably presented genotoxicity due to the increase in the dissolved fraction and synergistic effects of several metals found in the tailings of the Mariana accident.


Resumo A bacia do Rio Doce sofreu o maior acidente ambiental com o influxo de rejeitos de Fundão e Santarém, pertencentes à empresa de mineração Samarco, devido ao desastre em Mariana. Um derramamento entre 50 e 60 milhões de m3 de rejeitos foi estimado pela empresa. De acordo com a Samarco, o rejeito despejado era composto principalmente de argila, silte e alguns metais pesados como ferro, cobre e manganês. Com isso, o presente estudo teve como objetivo avaliar os danos genotóxicos em juvenis de Geophagus brasilienses expostos a água do rio Doce antes (DRWAA água do Rio Doce antes do acidente) e depois (DRWBA- água do Rio Doce depois do acidente) da chegada dos rejeitos do rompimento das barragens de Germano e Santarém em Mariana, MG, Brasil. Para isso, 24 indivíduos da espécie G. brasilienses (obtidos na piscicultura do IFES/ALEGRE) foram submetidos a um bioensaio com três tratamentos e oito réplicas. Os tratamentos eram: 1) Controle (com água do abastecimento urbano, filtrada com filtro analítico de 0,45 µm); 2) DRWBA e 3) DRWAA. Após um período de 96 h, esses peixes foram anestesiados para retirada de sangue para avaliação dos danos genotóxicos (micronúcleo e cometa). Para a realização do bioensaio, um total de 80 L de água do Rio Doce foram coletados antes da chegada dos rejeitos e outros 80 L foram coletados depois da chegada dos rejeitos e ambas foram submetidas a análises de quantificação de metal. Os peixes expostos ao DRWBA e ao DRWAA apresentaram um aumento significativo na quantidade de micronúcleos eritrocitários e no índice de danos do DNA em relação aos peixes controle, no entanto não apresentaram diferenças entre si. Os resultados obtidos demonstram que a DRWBA já era genotóxica para os peixes, principalmente, em função das concentrações de Cu dissolvido na água. A DRWAA apresentou genotixicidade, provavelmente, em função do aumento da fração dissolvida e do efeito sinérgico de diversos metais presentes nos rejeitos do acidente de Mariana.

7.
Braz. j. biol ; 76(1): 233-244, Feb. 2016. tab, graf
Article in English | LILACS | ID: lil-774511

ABSTRACT

Abstract The morphology and anatomy of the flower of Dalechampia alata, as well as the chemical nature of the exudates secreted in the inflorescence were studied using light microscope. This is the first report showing the presence of colleters in the genus Dalechampia. In the staminate flower occur a group of small secretory glands. The histochemical results indicate that the substance secreted from the glands is lipidic and resinuous in nature, while in the colleters it consists of polysaccharides and lipid-rich substances. The ovule of D. alata are anatropous, subglobose and bitegmic. It presents obturator, micropyle occluded by nucellar beak and meristematic activity in the ovary wall. The secretion produced in the stigmatic and transmitting tissue consists of polysaccharides.


Resumo A morfologia e anatomia das flores de Dalechampia alata, bem como a natureza química dos exsudatos secretados na inflorescência foram analisadas utilizando microscopia de luz. Este é o primeiro relato de coléteres para o gênero Dalechampia. Um grupo de pequenas glândulas secretoras ocorre nas flores estaminadas. Os resultados dos testes histoquímicos indicam que a substância secretada pelas glândulas apresenta natureza lipídica e resinosa, enquanto nos coléteres a secreção é constituída de polissacarídeos e lipídeos. O ovulo de D. alata é anátropo, subgloboso e bitegumentado. A presença de obturador, projeção do tecido nucelar pela micrópila e atividade meristemática na parede do ovário foram relatadas. A secreção do estigma e do tecido transmissor é constituída de polissacarídeos.


Subject(s)
Animals , Euphorbiaceae/anatomy & histology , Euphorbiaceae/chemistry , Inflorescence/anatomy & histology , Inflorescence/chemistry
8.
Braz. j. med. biol. res ; 49(12): e5805, 2016. graf
Article in English | LILACS | ID: biblio-828178

ABSTRACT

Machado-Joseph disease (MJD) or spinocerebellar ataxia type 3 (SCA3) is an autosomal dominant neurodegenerative disorder caused by expansion of the polyglutamine domain of the ataxin-3 (ATX3) protein. MJD/SCA3 is the most frequent autosomal dominant ataxia in many countries. The mechanism underlying MJD/SCA3 is thought to be mainly related to protein misfolding and aggregation leading to neuronal dysfunction followed by cell death. Currently, there are no effective treatments for patients with MJD/SCA3. Here, we report on the potential use of lithium carbonate and coenzyme Q10 to reduce cell death caused by the expanded ATX3 in cell culture. Cell viability and apoptosis were evaluated by MTT assay and by flow cytometry after staining with annexin V-FITC/propidium iodide. Treatment with lithium carbonate and coenzyme Q10 led to a significant increase in viability of cells expressing expanded ATX3 (Q84). In addition, we found that the increase in cell viability resulted from a significant reduction in the proportion of apoptotic cells. Furthermore, there was a significant change in the expanded ATX3 monomer/aggregate ratio after lithium carbonate and coenzyme Q10 treatment, with an increase in the monomer fraction and decrease in aggregates. The safety and tolerance of both drugs are well established; thus, our results indicate that lithium carbonate and coenzyme Q10 are good candidates for further in vivo therapeutic trials.


Subject(s)
Humans , Ataxin-3/drug effects , Cell Death/drug effects , Lithium Carbonate/pharmacology , Machado-Joseph Disease , Repressor Proteins/drug effects , Ubiquinone/analogs & derivatives , Cell Differentiation/drug effects , Cell Proliferation/drug effects , Machado-Joseph Disease/drug therapy , Ubiquinone/pharmacology
9.
Rev. bras. plantas med ; 17(3): 392-397, Jul-Sep/2015. tab, graf
Article in Portuguese | LILACS | ID: lil-752554

ABSTRACT

RESUMO No Brasil, a família Malvaceae está representada por aproximadamente 200 espécies e algumas foram descritas como gastroproteroras. Pavonia alnifolia A.St.-Hil. (Malvaceae) foi selecionada após uma abordagem quimiossistemática, considerando-se sua potencial capacidade em prevenir lesões gástricas. Assim, a atividade gastroprotetora do extrato etanólico de caules de P. alnifolia foi avaliada utilizando o modelo de indução aguda da lesão gástrica por etanol acidificado em camundongos. Além disso, foram quantificados o teor de flavonóides, pelo método de cloreto de alumínio, e de polifenóis, pelo método Folin-Ciocalteu, uma vez que a relação desses componentes com a proteção gástrica foi evidenciada. Os ensaios apontaram redução acentuada das lesões gástricas em camundongos tratados com o extrato da planta em todas as doses ensaiadas (10, 100 e 300 mg/kg). Esse efeito pode estar relacionado com a presença de polifenóis, cujo teor encontrado foi 74,3 ± 7,5 µg equivalente de pirogalol/mg do material vegetal examinado e 82,7 ± 7,1 µg equivalente de pirogalol /mg da amostra no extrato preparado por percolação e teor de flavonoides totais, que por sua vez apresentou um resultado de 17,1 ± 1,4 µg/mg de extrato. O extrato apresentou proteção da mucosa gástrica e este efeito pode estar relacionado à presença dos polifenóis e flavonóides encontrados


ABSTRACT Gastro protective activity of the Pavonia alnifolia A.St.-Hil. extract. In Brazil, the Malvaceae family is represented by at about 200 species. Some of those species are known as gastro protective ones. The Pavonia alnifolia A.St.-Hil (Malvaceae) was selected after a chemosystematic approach. The gastro preventive activity of the ethanol extract of stems Pavonia alnifolia was evaluated through the use of the Ethanol:chlroridric acid model on mice. The quantification of the total flavonoids (aluminum chloride method) and total polyphenols (Folin-Ciocalteu method) was also performed since the relation of those components with gastric protection has been previously highlighted. The tests showed a significant reduction of the ulcer formation in the mice treated with the plant extract (10, 100 and 300 mg/kg). This effect may be related to the presence of polyphenols whose content was found to be 74.3 ± 7.5 µg/mg of vegetal material and 82.7 ± 7.1 µg/mg of crude extract and flavonoids, which in turn showed a content of 17.1 ± 1.4 µg/mg dry extract


Subject(s)
Plant Extracts/analysis , Malvaceae/classification , Flavonoids/analysis , Polyphenols/analysis
10.
Rev. bras. plantas med ; 17(4): 543-549, out.-dez. 2015. tab, graf
Article in Portuguese | LILACS | ID: lil-763218

ABSTRACT

RESUMOO objetivo desse trabalho foi verificar o efeito do solo pré-cultivado com plantas aromáticas na germinação e no desenvolvimento inicial de plântulas de alface cv. Simpson. A pesquisa foi realizada na Embrapa Hortaliças, Brasília, em bandejas mantidas em casa de vegetação. O experimento foi conduzido em delineamento experimental inteiramente casualizado, com três repetições e onze tratamentos: solo pré-cultivado com hortelã-comum (Mentha x villosa), hortelã-brava (Mentha arvensis), hortelã-pimenta (Mentha piperita), Mentha spp., capim-citronela (Cymbopogon winterianus), capim-limão (Cymbopogon citratus), manjericão de folha larga (Ocimum basilicum), manjericão de folha roxa (Ocimum gratissimun), tomilho (Thymus vulgaris), sálvia (Salvia officinalis) e solo da mesma área sem cultivo prévio de planta aromática (controle). Aos 30 dias após o semeio, foram avaliadas: índice de velocidade de emergência (IVE), taxa de sobrevivência (TS), número de folhas (NF), comprimento da raiz principal (CRP) e da parte aérea (CPA), massa fresca da raiz (MFR) e da parte aérea (MFPA) e massa seca da raiz (MSR) e da parte aérea (MSPA). Os dados foram submetidos à análise de variância e teste de Tukey a 5% de probabilidade. Houve diferença significativa em relação ao IVE, sendo que o tratamento com C. citratus afetou negativamente a emergência das plântulas. O tratamento com M. arvensis apresentou uma TS de apenas 16% das plantas aos 30 dias após a semeadura. O NF foi menor no tratamento com M. arvensis, diferentemente de todos os demais, exceto S. officinalis. A MRF e MFF foram estimuladas pelo tratamento com T. vulgaris sendo superior a todos os outros tratamentos. Os resultados obtidos permitem concluir que houve efeito negativo de M. arvensis e positivo de T. vulgaris no desenvolvimento inicial de plântulas de alface.


ABSTRACTThis study aimed to verify the outcomesof the soil previously treated with aromatic plants in the germination and early seedling growth of lettuce var. Simpson under greenhouse conditions. The trial was developed at Embrapa Vegetables, in Brasília, Brazil in a completely randomized design with three replications and composed by eleven treatments as follow: soil cultivated with apple-mint (Mentha x villosa), wild mint (Mentha arvensis), peppermint (Mentha piperita), Mentha spp., citronella (Cymbopogon winterianus), lemon grass (Cymbopogoncitratus), basil (Ocimum basilicum), african basil (Ocimum gratissimun), thyme (Thymus vulgaris), sage (Salvia officinalis) and soil from the same area without prior cultivation of aromatic plant (control). The emergence velocity index (IVE), the survival rate (SR), the number of leaves (NL), the length of the main root (CRP) and the shoot (CPA), the fresh mass of the root (MFR) and the shoot (MFPA) and the dry mass of the root (MSR) and the shoot (MSPA), were evaluated 30 days after the sowing. The data were submitted to analysis of variance and Tukey's test at 5% probability. There was a significant difference regarding the IVE, in which the treatment with C.citratus negatively affected seedlingappearance. The treatment with M. arvensis showeda TS of only 16%at 30 days after the sowing. The NF was lower in the treatment with M. arvensis, differently from all the others, excepting the cultivation withS. officinalis. The MFR and the MFPA were stimulated by the treatment with T. vulgaris, which was higher than all the other cultivations. The obtained results showed that M. arvensis had a negative influence,while T.vulgaris presented a positive outcome in the early development of lettuce seedlings.


Subject(s)
Plants, Medicinal/anatomy & histology , Soil Analysis , Lactuca/classification , Germination , Plant Exudates/analysis , Rhizosphere , Allelopathy
11.
Arq. bras. med. vet. zootec ; 65(2): 519-525, abr. 2013. tab
Article in Portuguese | LILACS | ID: lil-673130

ABSTRACT

Avaliaram-se o desempenho e o rendimento de carcaça e cortes nobres de frangos de corte machos com suplemento nas rações de 1,25 dihidroxicolecalciferol e redução de cálcio e fósforo disponível. Foi utilizado um delineamento em blocos ao acaso, com seis tratamentos: 0,0; 1,0; 2,0; 3,0; 4,0 e 5,0µg de vitamina D3 ativa/kg de ração, e seis repetições com 17 aves cada. Aos 8 e 42 dias de idade cada unidade experimental foi pesada para avaliação do desempenho. Posteriormente, quatro aves/repetição foram retiradas e abatidas para mensuração do rendimento de carcaça e de cortes nobres. A inclusão da vitamina D3 ativa influenciou positivamente (P<0,05) o ganho de peso e a conversão alimentar com as suplementações de 1,0 e 2,0µg/kg. O consumo de ração não apresentou diferença significativa para os níveis estudados. O rendimento de carcaça e de cortes nobres de frangos de corte machos aos 42 dias não foram influenciados pelo suplemento de 1,25 dihidroxicolecalciferol e redução de cálcio e fósforo disponível nas rações. Recomenda-se o fornecimento suplementar de 1,0 a 2,0µg/kg de vitamina D3 ativa nas rações para frangos de corte machos de 8 a 42 dias de idade.


There were evaluated the performance, the carcass yield and noble cuts yield of broilers with supplement of 1,25-dihydroxycholecalciferol and reduction of calcium and available phosphorus. It was used a randomized block design, with six treatments: 0.0; 1.0; 2.0; 3.0; 4.0 and 5.0µg of active vitamin D3/kg of ration, and six repetitions with 17 birds each. At 8 and 42 days of age each experimental unit was weighted in order to evaluated the performance. Later, four broilers/repetition were removed and slaughtered in order to measure the carcass and noble cuts yield. The inclusion of active vitamin D3 influenced positively (P<0.05) the weight gain and the feed conversion at the supplementations of 1.0 and 2.0µg/kg. The feed intake wasn't significative among the studied levels. The carcass and noble cuts of male broilers at 42 days were not influenced by supplement of 1,25-dihydroxycholecalciferol and reduction of calcium and available phosphorus in rations. It is recommended to provide additional of 1.0 up to 2.0µg/kg of active vitamin D3 in rations for male broilers from 8 to 42 days of age.


Subject(s)
Animals , Poultry/methods , Animal Feed , Dietary Supplements/analysis , Vitamin D/analysis , Calcitriol , Chickens/physiology
12.
Rev. bras. plantas med ; 15(2): 180-187, 2013. graf
Article in Portuguese | LILACS | ID: lil-677024

ABSTRACT

Extratos aquosos da planta medicinal Achillea millefolium contêm macromoléculas de interesse para desenvolver fitodefensivos para a agricultura. Duas frações de mil folhas foram obtidas por ultrafiltração, E1 (contendo moléculas maiores que 30 kDa), e E3 (peptídeos entre 1 e 10 kDa) que inibiram o crescimento das bactérias fitopatogênicas Ralstonia solanacearum, gram-negativa, e Clavibacter michiganensis subsp. michiganensis, gram-positiva, com dependência de concentração. Os valores de concentração inibitória mínima (CIM) para ambos os extratos e bactérias foram baixos, entre 20 e 80µM. A CIM relativa à proteína total evidenciou a presença de macromoléculas muito ativas em E3, embora com baixa concentração proteica. E3 se aplica à prospecção de peptídeos antimicrobianos. Estimar a CIM relativa à quantidade de amostra vegetal valorizou o potencial antimicrobiano natural de E1, que contém alta concentração proteica. E1e E3 se aplicam ao desenvolvimento de fitodefensivos para uso biotecnológico. A ultrafiltração fracionou as amostras de forma nativa, rápida, e com baixo custo; além de dessalinizar, clarificar, purificar, e concentrar E1 e E3. Esse estudo inédito sobre a separômica e a ação antimicrobiana de extratos macromoleculares aquosos de mil folhas sugere que plantas cicatrizantes podem apresentar grande potencial para desenvolver fitodefensivos agrícolas naturais não danosos, à semelhança de medicamentos fitoterápicos.


Aqueous extracts from the medicinal plant Achillea millefolium contain macromolecules of interest to develop agrochemicals for agriculture. Two fractions of "mil folhas" were obtained by ultrafiltration, E1 (containing molecules larger than 30 kDa) and E3 (peptides between 1 and 10 kDa), which inhibited the growth of phytopathogenic bacteria Ralstonia solanacearum, gram-negative, and Clavibacter michiganensis subsp. michiganensis, gram-positive, concentration-dependent. The values of minimum inhibitory concentration (MIC) for both extracts and both bacteria were low, ranging from 20 to 80µM. The MIC relative to total protein evidenced the presence of very active macromolecules in E3, although showing low protein concentration. E3 applies to the prospection of antimicrobial peptides. The estimated MIC relative to the amount of plant sample valued the natural antimicrobial potential of E1, which contains high protein concentration. E1 and E3 can be used in the development of agrochemicals for biotechnological purposes. The ultrafiltration procedure fractionated the samples in a rapid and native way and at a low cost; it also desalted, clarified, concentrated and purified both E1 and E3. This pioneering study on the separomics and on the antimicrobial activity of macromolecular aqueous extracts from "mil folhas" suggests that healing plants have great potential to develop non-harmful agricultural natural agrochemicals, similarly to the available phytotherapic drugs.


Subject(s)
Plants, Medicinal/classification , Agrochemicals/administration & dosage , Achillea/adverse effects , Plant Extracts/adverse effects , Microbial Sensitivity Tests/methods , Antimicrobial Cationic Peptides , Ralstonia solanacearum
13.
J. venom. anim. toxins incl. trop. dis ; 17(3): 333-347, 2011. graf, tab
Article in English | LILACS | ID: lil-597233

ABSTRACT

In this study, we evaluated the actions of Crotalus durissus cumanensis venom (CDCmV), and its crotoxin (Crtx) fraction, on renal and vascular functions in Wistar rats. In isolated perfused kidneys, CDCmV (10 µg/mL) significantly increased the perfusion pressure (PP) from 110.7 ± 2.4 to 125.3 ± 2.8 mmHg after 30 minutes. This effect was accompanied by an increased renal vascular resistance (RVR) from 5.4 ± 0.1 to 6.2 ± 0.2 mmHg/mL.g-1.min-1. We observed decreases in urinary flow (UF) from 0.13 ± 0.01 to 0.05 ± 001 mL.g-1.min-1 and glomerular filtration rate (GFR) from 0.66 ± 0.06 to 0.18 ± 0.02 mL.g-1.min-1. Crtx did not change PP or RVR, but diminished GFR (from 0.65 ± 0.05 to 0.26 ± 003 mL.g-1.min-1) and UF (from 0.11 ± 0.008 to 0.09 ± 0.008 mL.g-1.min-1). Both CDCmV and Crtx reduced the percentage of tubular transport of sodium, chloride and potassium. The cytotoxicity of these substances against MDCK cells was tested by the MTT method: only CDCmV caused a decrease in the cell viability with an IC50 of 5.4 µg/mL. In endothelium-intact isolated aortic rings, CDCmV (0.1 to 30 µg/mL) increased the sustained phenylephrine-induced contraction to a value of 130.0 ± 6.6 percent of its corresponding control, but showed a relaxant effect in endothelium-denuded preparations. Similar results were observed in aortic rings contracted with potassium (40 mM). Crtx was ineffective in aortic ring assays. Thus, it is reasonable to suggest that the renal effects induced by the CDCmV may be due to its influence on the endothelium's ability to release factors that can alter the contractile behavior of vascular smooth muscle. In conclusion, CDCmV is toxic to kidney cells. It changes parameters of the renal function including the glomerular filtration rate, renal vascular resistance and tubular transport. The actions induced by CDCmV also involve endothelium-dependent vasoactive properties. Their effects may be only partially attributed to Crtx.


Subject(s)
Animals , Female , Rats , Crotalus , Crotoxin , Rats, Wistar , Crotalid Venoms/toxicity
14.
Braz. j. med. biol. res ; 42(7): 685-691, July 2009. graf, tab
Article in English | LILACS | ID: lil-517800

ABSTRACT

Nitric oxide (NO) influences renal blood flow mainly as a result of neuronal nitric oxide synthase (nNOS). Nevertheless, it is unclear how nNOS expression is modulated by endogenous angiotensin II, an inhibitor of NO function. We tested the hypothesis that the angiotensin II AT1 receptor and oxidative stress mediated by NADPH oxidase contribute to the modulation of renal nNOS expression in two-kidney, one-clip (2K1C) hypertensive rats. Experiments were performed on male Wistar rats (150 to 170 g body weight) divided into 2K1C (N = 19) and sham-operated (N = 19) groups. nNOS expression in kidneys of 2K1C hypertensive rats (N = 9) was compared by Western blotting to that of 2K1C rats treated with low doses of the AT1 antagonist losartan (10 mg·kg-1·day-1; N = 5) or the superoxide scavenger tempol (0.2 mmol·kg-1·day-1; N = 5), which still remain hypertensive. After 28 days, nNOS expression was significantly increased by 1.7-fold in the clipped kidneys of 2K1C rats and by 3-fold in the non-clipped kidneys of 2K1C rats compared with sham rats, but was normalized by losartan. With tempol treatment, nNOS expression increased 2-fold in the clipped kidneys and 1.4-fold in the non-clipped kidneys compared with sham rats. The changes in nNOS expression were not followed by changes in the enzyme activity, as measured indirectly by the cGMP method. In conclusion, AT1 receptors and oxidative stress seem to be primary stimuli for increased nNOS expression, but this up-regulation does not result in higher enzyme activity.


Subject(s)
Animals , Male , Rats , Angiotensin II/physiology , Hypertension, Renovascular/enzymology , NADPH Oxidases/drug effects , Nitric Oxide Synthase Type I/metabolism , Oxidative Stress/drug effects , Angiotensin II Type 1 Receptor Blockers/pharmacology , Angiotensin II/antagonists & inhibitors , Cyclic N-Oxides/pharmacology , Disease Models, Animal , Hypertension, Renovascular/physiopathology , Losartan/pharmacology , NADPH Oxidases/physiology , Oxidative Stress/physiology , Rats, Wistar , Spin Labels
15.
Braz. j. biol ; 66(1a): 151-159, Feb. 2006. ilus, tab, graf
Article in English | LILACS | ID: lil-426277

ABSTRACT

Estudos reprodutivos foram realizados em acessos brasileiros de poaia, Cephaelis ipecacuanha. O comportamento meiótico foi estudado usando a técnica de esmagamento. Foi observada segregação irregular de cromossomos durante meiose I e II, muitos grupos de cromossomos em telófase II, micronúcleos, divisão incorreta do citoplasma, citocinese incompleta e produtos pós-meióticos anômalos, principalmente políades. A média do índice meiótico foi inferior a 72%. A viabilidade polínica foi analisada utilizando-se solução de Alexander e a percentagem de pólen viável variou entre as formas florais, brevistila e longistila (85,3% a 93,1%), e entre as diferentes localidades (82,5% a 92,6%) analisadas. O tamanho do pólen variou entre viáveis e inviáveis, e entre os inviáveis vazios e contraídos. Em seu habitat natural, a poaia apresenta propagação por multiplicação vegetativa, mas a reprodução sexuada parece ser tão importante para essa espécie quanto a propagação vegetativa.


Subject(s)
Cephaelis/physiology , Chromosome Segregation/genetics , Chromosomes, Plant/genetics , Meiosis/physiology , Pollen/anatomy & histology , Meiosis/genetics , Reproduction/genetics , Reproduction/physiology
16.
Braz. j. biol ; 66(1)2006.
Article in English | LILACS-Express | LILACS, VETINDEX | ID: biblio-1467785

ABSTRACT

Reproductive studies were carried out on Brazilian accessions of ipecac, Cephaelis ipecacuanha. Meiotic behavior was studied using the squashing technique. Irregular chromosome segregation in meiosis I and II, many sets of chromosomes in telophase II, micronuclei, incorrect cytoplasm division, incomplete cytokinesis and anomalous post-meiotic products, mainly polyads, were observed. The mean meiotic index was lower than 72%. Pollen viability was analyzed using Alexander solution, and the percentages ranged between brevistylous and longistylous floral morphs (85.3 to 93.1%), and among different localities (82.5 to 92.6%) analyzed. The size of pollen ranged between viable and sterile, and empty and shrunken sterile. In its natural habitat, this species is known to propagate by vegetative multiplication, but sexual reproduction seems to be as important as the vegetative propagation to this species.


Estudos reprodutivos foram realizados em acessos brasileiros de poaia, Cephaelis ipecacuanha. O comportamento meiótico foi estudado usando a técnica de esmagamento. Foi observada segregação irregular de cromossomos durante meiose I e II, muitos grupos de cromossomos em telófase II, micronúcleos, divisão incorreta do citoplasma, citocinese incompleta e produtos pós-meióticos anômalos, principalmente políades. A média do índice meiótico foi inferior a 72%. A viabilidade polínica foi analisada utilizando-se solução de Alexander e a percentagem de pólen viável variou entre as formas florais, brevistila e longistila (85,3% a 93,1%), e entre as diferentes localidades (82,5% a 92,6%) analisadas. O tamanho do pólen variou entre viáveis e inviáveis, e entre os inviáveis vazios e contraídos. Em seu habitat natural, a poaia apresenta propagação por multiplicação vegetativa, mas a reprodução sexuada parece ser tão importante para essa espécie quanto a propagação vegetativa.

17.
J. bras. ginecol ; 94(9): 389-90, 1984.
Article in Portuguese | LILACS | ID: lil-22851

ABSTRACT

Em 41 gestantes portadoras de hipertensao cronica, correlacionou-se a medida de pressao arterial media (PAM) no segundo trimestre com as ocorrencias do periodo neonatal e com as complicacoes gestacionais apresentadas nestas pacientes. Encontrou-se uma relacao direta da PAM acima de 130 mmHg no segundo trimestre e elevada mortalidade perinatal, alta incidencia de baixo peso e prematuridade. Neste grupo de gestantes ocorreram frequentes complicacoes no pos-parto. Concluiu-se que a PAM no segundo trimestre tem grande valor no prognostico da sobrevivencia do recem-nascido de gestante hipertensa, e ainda correlacionou-se significativamente com a incidencia de complicacoes maternas no periodo pos-parto.


Subject(s)
Pregnancy , Humans , Female , Arterial Pressure , Hypertension , Pregnancy Complications, Cardiovascular , Prognosis
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