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Search Results: 1 - 10 of 44923 matches for " o. vulgare "
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The potential of Origanum vulgare L. (Lamiaceae) essential oil in inhibiting the growth of some food-related Aspergillus species
Carmo, Egberto Santos;Lima, Edeltrudes de Oliveira;Souza, Evandro Leite de;
Brazilian Journal of Microbiology , 2008, DOI: 10.1590/S1517-83822008000200030
Abstract: origanum vulgare l. (lamiaceae) has been currently known for their interesting antimicrobial activity being regarded as alternative antimicrobial for use is food conservation systems. this study aimed to evaluate the effectiveness of o. vulgare essential oil in inhibiting the growth of some food-related aspergillus species (a. flavus, a. parasiticus, a. terreus, a. ochraceus, a. fumigatus and a. niger). the essential oil revealed a strong anti-aspergillus property providing an inhibition of all assayed mould strains. mic values were between 80 and 20 μl/ml being found a mic50 of 40 μl/ml. the essential oil at concentration of 80 and 40 μl/ml provided a fungicidal effect on a. flavus, a. fumigatus and a. niger noted by a total inhibition of the radial mycelial growth along 14 days of interaction. in addition, the essential oil was able to inhibit the mould spores germination when assayed at concentrations of 80 and 40 μl/ml. our results showed the interesting anti-aspergillus activity of o. vulgare essential oil supporting their possible use as anti-mould compound in food conservation.
Antioxidant Capacity of Ocimum basilicum L. and Origanum vulgare L. Extracts
Biljana Kaurinovic,Mira Popovic,Sanja Vlaisavljevic,Svetlana Trivic
Molecules , 2011, DOI: 10.3390/molecules16097401
Abstract: The antioxidant properties of five different extracts (Et2O, CHCl3, EtOAc, n-BuOH, and H2O) of Ocimum basilicum L. and Origanum vulgare L. were studied. Antioxidant activity was assessed in six different model systems. Free radical scavenging capacity (RSC) was evaluated by measuring the scavenging capacity of extracts on DPPH, NO, O2·- and OH radical, as well as on hydrogen peroxide (H2O2). In addition, the protective effects on lipid peroxidation in liposomes (LPx) were evaluated by TBA-assay using the Fe2+/ascorbate induction system. The amount of total phenolic compounds and content of total flavonoids was also determined. EtOAc, n-BuOH and H2O extracts of O. basilicum and O. vulgare expressed very strong scavenger activity. Furthermore, the mentioned extracts showed notable inhibition of LPx. On the other hand, Et2O and CHCl3 extracts showed much weaker effect in the neutralization of DPPH, NO and O2·- radicals and the neutralization of H2O2. When examining the production of OH radicals and inhibition of LPx, the Et2O and CHCl3 extracts showed weak prooxidative properties. The observed differences in antioxidant activity could be partially explained by the levels of phenolics and flavonoids in the investigated O. basilicum and O. vulgare extracts.
Efeito do substrato na morfologia de conídios de Bipolaris sorokiniana e da densidade de inóculo na intensidade da mancha marrom em cevada
Barba, Javier Toledo;Reis, Erlei M;Forcelini, Carlos A;
Fitopatologia Brasileira , 2004, DOI: 10.1590/S0100-41582004000100001
Abstract: the fungus bipolaris sorokiniana causes brown spot, a barley (hordeum vulgare) disease, worldwide. identification of the fungus is based mainly on the morphology of its conidia, whose size and septation may be altered by many factors. this research studies the effect of growing substrates on the size, septation, and morphology of conidia, as well as the relationship of inoculum density to disease intensity. the various substrates included six culture media, seeds, and fresh leaves of barley, wheat (triticum aestivum), rye (secale cereale), and triticale (triticum secalotricum). conidia formed in culture media (68,2 × 21,9 mm; 5,7 pseudosepta) and on seeds (78,3 × 20,4 mm; 7,2 pseudosepta) were shorter, wider, and with less septa than those from leaf lesions (92,9 × 18,2 mm; 7,7 pseudosepta). the effect of the inoculum density (id) on disease intensity (di) was tested by applying spore suspensions (2.5 x 103, 5.0 x 103, 10.0 x 103, 15.0 x 103, and 20.0 x 103 conidia/ml) to plants of the barley cultivar br-2. the id/di relationship was represented by a quadratic model equation, in which the maximum values of 183 lesion/leaf and 79% disease severity were obtained with 16.500 and 14.000 conidia/ml, respectively. the number of conidia required for one leaf lesion was estimated in 50 to 90.
Efeito do substrato na morfologia de conídios de Bipolaris sorokiniana e da densidade de inóculo na intensidade da mancha marrom em cevada
Barba Javier Toledo,Reis Erlei M,Forcelini Carlos A
Fitopatologia Brasileira , 2004,
Abstract: O fungo Bipolaris sorokiniana causa a mancha marrom da cevada (Hordeum vulgare), doen a foliar amplamente distribuída no mundo. A sua identifica o ou diferencia o de outras espécies baseia-se principalmente na varia o morfológica dos esporos. Porém, muitos fatores podem alterar o tamanho e a septa o dos conídios dentro da espécie. O presente trabalho objetivou estudar o efeito de diferentes substratos no tamanho, septa o e morfologia de conídios de B. sorokiniana, assim como o efeito da densidade de inóculo na intensidade da mancha marrom em plantas de cevada. Os substratos constaram de seis meios de cultura, de sementes e folhas verdes de cevada, trigo (Triticum aestivum), centeio (Secale cereale) e triticale (Triticum secalotricum). O tipo de substrato afetou significativamente o comprimento, a largura e o número de pseudoseptos de B. sorokiniana. Os esporos desenvolvidos em meios de cultura (68,2 × 21,9 mm; 5,7 pseudoseptos) e em sementes (78,3 × 20,4 mm e 7,2 pseudoseptos) foram mais curtos, mais largos e com menor número de pseudoseptos, além de serem mais escuros e retos, em rela o aos recuperados de tecidos verdes (92,9 × 18,2 mm e 7,7 pseudoseptos). O efeito da densidade de inóculo foi testado através da aplica o de suspens es de esporos contendo 2,5 x 103, 5 x 103, 10 x 103, 15 x 103 e 20 x 103 conídios/ml a plantas de cevada do cultivar BR-2. A rela o com a intensidade da mancha marrom seguiu uma tendência polinomial quadrática, na qual os pontos máximos corresponderam a 183 manchas/folha (16.500 esporos/ml) e 79% de severidade (14.000 esporos/ml). Estimou-se que 50 a 90 esporos foram necessários para produzir uma les o.
Yield and production components of barley plant (Hordeum vulgare) in function of nitrogen fertilization
Mikael Neumann,Marcos Rogério de Oliveira,Cecília Aparecida Spada,Danúbia Nogueira Figueira
Pesquisa Aplicada & Agrotecnologia , 2010, DOI: 10.5777/1504
Abstract: The experiment was conducted to evaluate the effect of increasing nitrogen levels on forage yield and components of barley plant (Hordeum vulgare). The treatments were: T1 – 0 kg ha-1 of N; T2 – 80 kg ha-1 of N; T3 – 100 kg ha-1 of N; T4 – 120 kg ha-1 of N; T5 – 150 kg ha-1 of N; T6 – 180 kg ha-1 of N and T7 – 220 kg ha-1 of N. No significant interaction (P>0.05) was observed between fertilization levels and evaluation period for variables for tiller m-2 number and dry matter content of barley plant. The regression equations for tiller m-2 number observed of 23 days (854.0752 + 2.1593N) and 45 (1020.7458 + 1.4729N) days after culture implantation showed linear behavior rising in 2.16 and 1.47, respectively for each kg of nitrogen applied. The regression equations for dry matter production observed of 23 days after culture implantation (720.0365 + 3.4388N) also to adjusted linear behavior rising in 3.44 kg ha for each kg of nitrogen applied. No difference (P>0.05) was observed for dry matter production observed 45 days after culture implantation in function of nitrogen fertilization. The culture implantation cost (R$ ha-1) showed linear behavior (181.9183 + 0.9842N), rising in R$ 0.98 for each kg of nitrogen applied. O objetivo deste trabalho foi avaliar o efeito de níveis de aduba o nitrogenada em cobertura sobre o rendimento e a produ o da planta de cevada (Hordeum vulgare, L.). Foram avaliados os seguintes tratamentos: T1 – 0 kg ha-1 de N; T2 – 80 kg ha-1 de N; T3 – 100 kg ha-1 de N; T4 – 120 kg ha-1 de N; T5 – 150 kg ha-1 de N; T6 – 180 kg ha-1 de N; e T7 – 220 kg ha-1 de N. O delineamento experimental foi o de blocos casualizados, composto por sete tratamentos e três repeti es. N o houve intera o significativa (P > 0,05) entre nível de aduba o nitrogenada e época de avalia o para número de perfilhos m-2 e teores de matéria seca das plantas de cevada. As equa es de regress o para número de perfilhos m-2 observados 23 dias após plantio (854,0752 + 2,1593N) e 45 dias após plantio (1020,7458 + 1,4729N) mostraram resposta linear crescente de 2,16 e 1,47, respectivamente para cada kg de N aplicado em cobertura na cultura da cevada. Os dados de produ o de matéria seca (720,0365 + 3,4388N) ajustaram-se linearmente, indicando que para cada kg de N aplicado em cobertura na cultura da cevada incrementou-se a produ o em 3,44 kg ha-1 de matéria seca, na primeira data de avalia o (23 dias após plantio). Já na produ o de matéria seca acumulada na segunda data de avalia o (45 dias após plantio), n o se observou diferen a significativa na produ o de mat
Rea o de cultivares de cevada a Drechslera teres, e variabilidade patogênica de isolados do Sul do Brasil
Wordell Filho Jo?o Américo,Prestes Ariano Morais,Silva Márcio Só
Pesquisa Agropecuária Brasileira , 2002,
Abstract: Objetivou-se avaliar a rea o de 58 cultivares de cevada a Drechslera teres, agente causal da mancha-em-rede, bem como a variabilidade patogênica e freqüência de sintomas do patógeno. A rea o das cultivares foi estimada com auxílio de uma escala de notas de 0 a 4, em que zero (0) representa a ausência de sintomas, e 4 representa os sintomas típicos da mancha-em-rede. O mesmo método foi utilizado para avaliar a variabilidade patogênica de 25 isolados oriundos do Sul do Brasil. Seis isolados de boa capacidade de esporula o foram utilizados para comparar o número de les es e a severidade da doen a. As cultivares diferiram quanto à rea o a D. teres, e identificaram-se as três cultivares, BR 2, EMBRAPA 43 e PFC 8590, como fontes de resistência moderada à doen a. Em testes de 25 isolados de D. teres, inoculados na concentra o de 1,7x10(4) conídios/mL, detectaram-se diferen as significativas entre os isolados, evidenciando diferen as na sua virulência. Pelo sistema de nomenclatura de Limpert & Müller, foi possível diferenciar padr es de virulência de isolados oriundos de diferentes regi es do Sul do Brasil. O número de les es e a severidade foram intimamente relacionadas com o local de origem do isolado.
CARACTERIZA O F SICO-QU MICA DO FRUTO E DO “LEO EXTRA DO DE TUCUM (ASTROCARYUM VULGARE MART)
EDERLAN DE SOUZA FERREIRA,VIT?3RIA GEORGINA LUCIEN,ANDR?? SIQUEIRA AMARAL,CATIA DA SILVA SILVEIRA
Alimentos e Nutri??o , 2009,
Abstract: Este estudo teve como objetivo determinar as caracter -sticas f -sico-qu -micas do fruto e do 3leo extra -do de tucum £ (Astrocaryum vulgare). Frutos de tucum £ foram submetidos an lise dos aspectos f -sicos. Na polpa in natura e na torta foram realizadas determina § μes de composi § £o qu -mica. O 3leo bruto do fruto foi submetido s determina § μes f -sico-qu -micas e de quanti ca § £o dos principais cidos graxos. O fruto de tucum £ demonstrou rendimento de 25% de polpa, caracterizado por elevados teores lip -dico, cal 3rico e de concentra § £o de 2-caroteno. A torta mostrou ser uma consider vel fonte de bras e carboidratos. O 3leo bruto de tucum £ reportou propriedades qu -micas pr 3ximas s caracter -sticas do 3leo de palma. Por outro lado, a quanti ca § £o dos principais cidos graxos mostrou que sua composi § £o apresenta 29% de cidos saturados e apenas 1% de poliinsaturados. Os cidos monoinsaturados representam 68%, tendo como principal representante o cido ol ico que constituiu 67% da composi § £o qu -mica. Os resultados indicaram que o fruto de tucum £ apresenta importantes propriedades nutricionais, como fonte de caloria, pr 3-vitamina A, bras e lip -dios, especialmente, do cido graxo ol ico.
Características anat micas foliares de plantas de orégano (Origanum vulgare L.) submetidas a diferentes fontes e níveis de aduba o organica = Leaf anatomical traits of oregano (Origanum vulgare L.) plants, subjected to different sources and levels of organic fertilization
Ricardo Monteiro Corrêa,José Eduardo Brasil Pereira Pinto,érika Soares Reis,Cynthia de Oliveira
Acta Scientiarum : Agronomy , 2009,
Abstract: Objetivou-se avaliar a influência de níveis de adubos organicos bovino e avícola no teor de clorofila e características anat micas de folhas de plantas de orégano cultivadas em casade- vegeta o. Foram conduzidos dois ensaios separadamente, sendo um com esterco bovino e ooutro com esterco de aves. Plantas de orégano (Origanum vulgare L.) foram cultivadas em vasos de 10 L, submetidas aos seguintes tratamentos: Ensaio I: esterco bovino: 1) solo sem aduba o(controle); 2) solo + 3,0 kg m-2 de esterco bovino; 3) solo + 6,0 kg m-2 de esterco bovino; 4) solo + 9,0 kg m-2 de esterco bovino; 5) solo + 12,0 kg m-2 de esterco bovino; Ensaio II – esterco avícola: 1) solo sem aduba o (Controle); 2) solo + 1,5 kg m-2 de esterco de galinha; 3) solo + 3,0 kg m-2 de esterco de galinha; 4) solo + 4,5 kg m-2 de esterco de galinha e 5) solo + 6,0 kg m-2 de esterco de galinha. Os ensaios foram conduzidos no delineamento experimental em blocos casualizados, com quatro repeti es, e a parcela experimental foi composta por quatro vasos. Observou-se que os níveis de esterco bovino e de aves influenciaram o teor de clorofila e características anat micas das folhas de orégano. This study was performed to evaluate the effect of different levels of cattle and chicken manure organic fertilization in thechlorophyll content and anatomic parameters of leaves of Origanum vulgare L. cultivated in greenhouse. Two assays were carried out separately, one with cattle manure and the other with chicken manure. Origanum vulgare L. plants were cultivated in 10 L pots with the following treatments: Trial I: Cattle manure: 1) Soil without fertilization (control); 2) Soil + 3.0 kg m-2 of cattle manure; 3) Soil + 6.0 kg m-2 of cattle manure; 4) Soil + 9.0 kg m-2 of cattle manure; 5) Soil + 12.0 kg m-2 of cattle manure; Trial II: Chicken manure: 1) Soil without fertilization (Control); 2) Soil + 1.5 kg m-2 of chicken manure; 3) Soil + 3.0 kg m-2 of chicken manure; 4) Soil + 4.5 kg m-2 of chicken manure and 5) Soil + 6.0 kg m-2 of chicken manure. Both trials were carried out in randomized blocks with 4 repetitions and 4 pots per experimental parcel. It was observed thatthe levels of organic fertilization significantly influenced the chlorophyll content and anatomic parameters of wild marjoran leaves.
A temperatura no desenvolvimento da atividade das enzimas (1-3, 1-4)- β-glucanases e degrada??o de β-glucanos durante a maltea??o
Beleti, Marcos Ant?nio;Duarte, Felipe;Georg-Kraemer, Janaína Endres;
Ciência Rural , 2012, DOI: 10.1590/S0103-84782012000300013
Abstract: some characteristics related to the quality of malt can be worked not only at the genetic level and/or as responses to environmental interactions, but also in industrial process. this study assesses the effect of temperature on β-glucanase activity and on the degradation of β-glucans during the last four days of germination, in the malting process. four cultivars of good quality malting ('n721', 'n743', 'scarlett' and 'sebastian') were analyzed and the results showed they had different performance on the enzyme activity and β-glucan degradation, at the different temperatures tested. a slightly higher temperature at the beginning of germination (22°c) was more effective in terms of the variables studied. cultivar 'n721' presented the best performance compared to other cultivars, revealing a more homogeneous pattern of β-glucan degradation during germination and also increased efficiency in degrading -glucans as early as in the 96th hour of the germination process. high activity of β-glucanases and shorter time is very interesting to the brewery industry, since it represents an optimization of the malt volume produced and a cost reduction for its production.
Allelopathy of Cold Water Extracts from Origanum vulgare ssp. vulgare L.  [PDF]
Asya Pencheva Dragoeva, Vanya Petrova Koleva, Zheni Dimitrova Nanova, Mariya Zhivkova Kaschieva
Journal of Agricultural Chemistry and Environment (JACEN) , 2014, DOI: 10.4236/jacen.2014.34017
Abstract: Secondary metabolites in medicinal plants could lead to discovery of new classes of herbicides. Recently aromatic plants have gained interest as a source of allelopathic secondary metabolites. Origanum vulgare ssp. vulgare L. infusions in hot water are used in folk medicine and possess proved beneficial biological activity. Plant-to-plant variability of metabolites due to genetic heterogeneity is established in Lamiaceae family. From this point of view, studies on plants from different geographic regions might reveal important sources of variability. The objective of this study was to evaluate allelopathic activity of cold water extracts made from the aerial parts of O. vulgare ssp. vulgare growing wild in Northeast Bulgaria in laboratory conditions. The allelopathic effect was evaluated using root elongation test and Allium cepa-test. Oregano extracts (17.5 g/l, 52.5 g/l) significantly decreased root length of Triticum aestivum L. (P ≤ 0.001). The root growth reduction could serve as a sign for presence of water soluble allelopathic secondary metabolites in the plant tested. Oregano (3.5 g/l) inhibited cell division in Allium root meristematic cells. The decline of the mitotic index indicates the occurrence of a cytotoxic effect. Oregano induced abnormalities in mitotic and interphase cells, so can be also considered as genotoxic. The observed macroscopic and microscopic effects of tested extracts indicated presence of water soluble allelochemicals in O. vulgare ssp. vulgare. This characteristic could be further studied as a possibility to be used in weed management programs.
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