Letteratura scientifica selezionata sul tema "P-Hydroxycinnamic acids"
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Articoli di riviste sul tema "P-Hydroxycinnamic acids"
Lubbers, R. J. M., A. Dilokpimol, J. Visser e R. P. de Vries. "Aspergillus niger uses the peroxisomal CoA-dependent β-oxidative genes to degrade the hydroxycinnamic acids caffeic acid, ferulic acid, and p-coumaric acid". Applied Microbiology and Biotechnology 105, n. 10 (maggio 2021): 4199–211. http://dx.doi.org/10.1007/s00253-021-11311-0.
Testo completoYong, Huimin, Yunpeng Liu, Dawei Yun, Shuai Zong, Changhai Jin e Jun Liu. "Chitosan Films Functionalized with Different Hydroxycinnamic Acids: Preparation, Characterization and Application for Pork Preservation". Foods 10, n. 3 (5 marzo 2021): 536. http://dx.doi.org/10.3390/foods10030536.
Testo completoBento-Silva, Andreia, Noélia Duarte, Elsa Mecha, Maria Belo, Maria Carlota Vaz Patto e Maria do Rosário Bronze. "Hydroxycinnamic Acids and Their Derivatives in Broa, a Traditional Ethnic Maize Bread". Foods 9, n. 10 (15 ottobre 2020): 1471. http://dx.doi.org/10.3390/foods9101471.
Testo completoFilannino, Pasquale, Marco Gobbetti, Maria De Angelis e Raffaella Di Cagno. "Hydroxycinnamic Acids Used as External Acceptors of Electrons: an Energetic Advantage for Strictly Heterofermentative Lactic Acid Bacteria". Applied and Environmental Microbiology 80, n. 24 (26 settembre 2014): 7574–82. http://dx.doi.org/10.1128/aem.02413-14.
Testo completoBichot, Lerosty, Geirnaert, Méchin, Carrère, Bernet, Delgenès e García-Bernet. "Soft Microwave Pretreatment to Extract P-Hydroxycinnamic Acids from Grass Stalks". Molecules 24, n. 21 (28 ottobre 2019): 3885. http://dx.doi.org/10.3390/molecules24213885.
Testo completoSun, Wenli, e Mohamad Hesam Shahrajabian. "Therapeutic Potential of Phenolic Compounds in Medicinal Plants—Natural Health Products for Human Health". Molecules 28, n. 4 (15 febbraio 2023): 1845. http://dx.doi.org/10.3390/molecules28041845.
Testo completoBento-Silva, Andreia, Noélia Duarte, Elsa Mecha, Maria Belo, Ana Teresa Serra, Maria Carlota Vaz Patto e Maria Rosário Bronze. "Broa, an Ethnic Maize Bread, as a Source of Phenolic Compounds". Antioxidants 10, n. 5 (26 aprile 2021): 672. http://dx.doi.org/10.3390/antiox10050672.
Testo completoKotsupii, Olga Viktorovna, e Tatyana Aleksandrovna Shemetova. "FEATURES OF ACCUMULATION OF PHENOLIC COMPOUNDS IN ENDEMIC SPECIES ASTRAGALUS IONAE PALIBIN AND A. PALIBINII POLOZHIJ GROWING ON THE TERRITORY OF THE REPUBLIC OF KHAKASIA". chemistry of plant raw material, n. 2 (23 maggio 2024): First. http://dx.doi.org/10.14258/jcprm.20240212441.
Testo completovan Beek, Sylvie, e Fergus G. Priest. "Decarboxylation of Substituted Cinnamic Acids by Lactic Acid Bacteria Isolated during Malt Whisky Fermentation". Applied and Environmental Microbiology 66, n. 12 (1 dicembre 2000): 5322–28. http://dx.doi.org/10.1128/aem.66.12.5322-5328.2000.
Testo completoBergvinson, D. J., J. T. Arnason e L. N. Pietrzak. "Localization and quantification of cell wall phenolics in European corn borer resistant and susceptible maize inbreds". Canadian Journal of Botany 72, n. 9 (1 settembre 1994): 1243–49. http://dx.doi.org/10.1139/b94-152.
Testo completoTesi sul tema "P-Hydroxycinnamic acids"
Main, Oscar. "Optimising forage maize's digestible yield under contrasted environments". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASB019.
Testo completoMaize stands as a pillar of the French forage system, with its yield and silage feeding value serving as key criteria for the registration of maize hybrid varieties in the official French catalogue. Previous research on this topic has revealed a direct correlation between silage feeding value and dry matter (DM) digestibility, which is, in turn, constrained by cell wall (CW) digestibility and significantly affected by water deficit. Studies on maize inbred lines have shown that under severe water deficit conditions, both DM and CW digestibilities increase. This increase correlates with a decrease in lignin content and changes in lignin distribution. However, it is noteworthy that breeding efforts have already fixed lignin content in hybrid varieties. Therefore, lignin content is unlikely to be a source of future digestibility improvement. To explore other CW targets and the impact of water deficit on these traits, this PhD study was conducted as part of the Carnot Plant2Pro INRAE-ARVALIS MAMMA MIA project. We grew a range of modern forage maize hybrids representative of the current S0-S1 (very-early to early flowering earliness) French market for two years under sixteen contrasted environmental conditions, including six in controlled irrigation conditions. First, we established a simple but robust stress index (SID) that considers the water deficit in the soil and the air temperature. This SID provided a key environmental ranking tool, highlighting severe stress due to high temperature that significantly impacted DM digestibility compared to moderate stress conditions. Secondly, to encompass a wide range of environmental conditions in biochemical quantifications, we developed several predictive near-infrared spectroscopy (NIRS) equations capable of robustly and accurately predicting fine cell wall traits and relationships, mirroring levels observed in laboratory experiments. While these equations prove sufficiently robust for use in selection programs, we emphasize the need for vigilance in accurately estimating prediction accuracy under stress conditions, particularly in equations applied to hybrid material where trait variation ranges are often limited. The core dataset of this work enabled a multiscale analysis, integrating agroclimatic, agronomic, biochemical, and histological traits, along with in sacco experimental data on cows. We proposed biochemical and histological traits to improve the quality of forage maize depending on stress intensity. We demonstrated that under severe stress, ear production decreases significantly, but DM digestibility can be maintained by increasing CW digestibility. This boost in CW digestibility was due to a reduction in p-hydroxycinnamic acid content, while lignin content remained stable, as anticipated. The significance of lignin distribution increased with the severity of stress, reaching an extreme threshold where biochemical parameters solely account for digestibility variations. This two-threshold model presents a window of opportunity located at the first threshold between non-stressed and moderately stressed environments, where the increased role of lignin distribution alongside biochemical traits enabled an increase in digestible yield. By controlling irrigation doses in the field under moderate drought conditions and integrating the SID into an irrigation management tool, farmers could exploit this window to increase productivity
Antunes, Marlene Neves. "Constituintes químico de Cochlospermum regium (Martius e Schrank) Pilger (Bixaceae)". Pontifícia Universidade Católica de Goiás, 2009. http://localhost:8080/tede/handle/tede/2123.
Testo completoThe medicinal plants have been a rich source for obtaining bioactive molecules, constituting one of the most successful strategies in the discovery of novel medicines. The specie Cochlospermum regium (Martius and Schrank) Pilger (Bixaceae), popularly known as algodãozinho-do-campo is a native plant, abundant in Brazilian Cerrado. After an ethnobotanical and ethnopharmacological research carried out at Tocantins State it was showed that this plant is used in folk medicine to treat several illnesses. Among the therapeutic indications the most frequents are: gynecological and renal inflammations, prostatitis, a few kinds of pains, fever, gastritis and skin affections, among others. This study aimed to contribute to the knowledge of the chemical constituents of C. regium. For this, extracts solutions were obtained by an exhausting way maceration of this plants roots in the solvents: hexane, dichloromethane, ethyl acetate and methanol, in this sequence increasing polarity, obtaining the following income rude mass macerated: 1,78%, 0,23%; 0,51% and 12,16%, respectively. The phytochemical investigation of the hexane extract (CrRH) allowed the isolation of substance initially identified as SA (7,0 mg), an unpublished chemical compound, still in characterization process and Substance SB (20,0 mg), identified as excelsina, a lignan reported for the first time in this specie. From the CrRH1 fraction originated by the fractionating chromatography column of the hexane extract was isolated the substance SC (6,0 mg) identified as a steroid, still in structural elucidation. From the dichloromethane extract (CrRD) the substance SD (9,0 mg) was isolated and identified as phidroxicinamic acid stereate, whose structures are not yet fully defined. Data obtained so far indicate the existence of a mixture of p-hidroxicinâmic acids, probably varying the size of the side chain ester. On the fractionation of ethyl acetate extract was obtained the substance SE (23mg) originated from the CrRAc1 fraction and identified as naringenin, a common flavanone in the genus Cochlospermum, have been also isolated in the stalk bark of this specie, not having, however, reports the presence of this flavanone in roots of C. regium. And finally, the SF substance (15,0 mg), originated of the CrRAc2 fraction, which was also identified as excelsina.
As plantas medicinais têm sido uma rica fonte para obtenção de moléculas bioativas, constituindo-se numa das mais bem sucedidas estratégias na descoberta de novos medicamentos. A espécie Cochlospermum regium (Martius e Schrank) Pilger (Bixaceae), popularmente conhecida como algodãozinho-do-campo, é uma planta nativa, abundante no cerrado brasileiro. No Tocantins, levantamento etnobotânico e etnofarmacológico realizado demonstrou que esta planta é utilizada na medicina popular no tratamento de várias enfermidades. Entre as indicações terapêuticas mais freqüentes estão: inflamações ginecológicas e renais, prostatites, dores diversas, febre, gastrite e afecções de pele, entre outras. Assim, este trabalho teve como objetivo contribuir para o conhecimento dos constituintes químicos de C. regium. Para tanto, foram obtidos extratos macerando-se diretamente, de forma exaustiva, as raízes da espécie nos solventes hexano, diclorometano, acetato de etila e metanol, nesta seqüência crescente de polaridade, obtendo-se o seguinte rendimento da massa bruta macerada: 1,78%, 0,23%; 0,51% e 12,16%, respectivamente. A análise fitoquímica do extrato hexano (CrRH) permitiu o isolamento das substâncias identificadas inicialmente como SA (7,0mg), composto inédito, ainda em processo de caracterização e Substância SB (20,0 mg), identificada como excelsina, uma lignana reportada pela primeira vez nesta espécie. Da fração CrRH1 proveniente do fracionamento cromatográfico do extrato hexânico, isolou-se a substância SC (6,0 mg) identificada como esteróide, ainda em fase de elucidação estrutural. Do extrato diclorometânico (CrRD) foi isolada a substância SD (9,0 mg), identificada como ácido p-hidroxicinâmico estereato, cuja estrutura ainda não está totalmente definida. Dados obtidos até o momento apontam a existência uma mistura de ácidos p-hidroxicinâmicos, provavelmente variando o tamanho da cadeia lateral do éster. Do fracionamento do extrato acetato de etila obteve-se a substância SE (23mg) originada da fração CrRAc1 e identificada como naringenina, flavanona comum no gênero Cochlospermum, tendo sido isolada, também, na casca do caule desta espécie, não havendo, entretanto, relatos da presença desta flavonona em raiz de C. regium. E finalmente, a substância SF (15,0 mg) originada da fração CrRAc2, que também foi identificada como excelsina.
Cordeiro, Adriana Rute. "ESTUDO QUÍMICO DA PRÓPOLIS DOS CAMPOS GERAIS DO PARANÁ". UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2013. http://tede2.uepg.br/jspui/handle/prefix/2115.
Testo completoCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
This study aimed to develop methods for obtaining extracts for the isolation and chemical analysis of propolis using two samples from the region known as “Campos Gerais do Paraná”. One of the studied propolis samples was produced in the district of Ipiranga and another in the municipality of Ponta Grossa. The utilized general fractionation method allowed obtaining from the same sample the essential oils and then the aqueous extracts and various organic fractions containing chemical components of several polarities. The analyses of the essential oils showed that both samples of propolis contain several components found in Baccharis dracunculifolia, known as vassoura or alecrim do campo, indicating that these are similar to those of green propolis produced in southeastern Brazil. The analyses also demonstrated the presence of phenol compounds such as flavonoids and caffeoylquinic acids, pointing once again that the botanical origin of both propolis includes the alecrim do campo. The analyses of essential oils originating from Ipiranga propolis sample indicated spathulenol and (E)-nerolidol as the main components, while the one acquired in Ponta Grossa showed high proportions of two substances containing aromatic rings in their structures, 2,6-di-t-butyl-p-cresol and benzyl benzoate. The two sesquiterpene alcohols spathulenol and (E)-nerolidol are commonly found in essential oils from B. dracunculifolia and appear in propolis from Ponta Grossa in low percentages, while the two mentioned aromatic compounds are not commonly found in the genus Baccharis. The various analyses of extracts and isolates showed that two aromatic acids may be considered as marker substances for both samples of propolis. The para-hydroxycinnamic acid seemed to be characteristic of propolis from Ipiranga, while the benzoic acid could be considered typical of the sample from Ponta Grossa. Atomic absorption spectrometry analyses that were conducted with both studied propolis did not indicate neither high levels of essential minerals nor the presence of heavy metals, and this fact represents a guarantee that producers have been working in clean environments.
Este estudo buscou desenvolver métodos para a obtenção de extratos destinados ao isolamento e análises químicas de própolis utilizando duas amostras provenientes da Região dos Campos Gerais do Paraná. Uma das amostras de própolis estudadas foi produzida no município de Ipiranga e a outra no município de Ponta Grossa. O método geral de fracionamento utilizado permitiu obter, de uma mesma amostra, os óleos essenciais e em seguida o extrato aquoso e diversos extratos orgânicos contendo substâncias de várias polaridades. As análises dos óleos essenciais demonstraram que ambas as amostras de própolis contém vários componentes também presentes na espécie vegetal Baccharis dracunculifolia, conhecida como vassoura ou alecrim do campo, indicando tratar-se da chamada própolis verde, similares às produzidas na região sudeste do Brasil. As análises também demonstraram a presença de substâncias fenólicas, tanto flavonoides como ácidos cafeoilquínicos, reforçando que a origem botânica das própolis analisadas inclui o alecrim dos campos. As análises de óleos essenciais da amostra de Ipiranga indicaram como componentes principais o espatulenol e o (E)-nerolidol, enquanto que as de Ponta Grossa apresentaram altas proporções de duas substâncias contendo anéis aromáticos em suas estruturas, o 2,6-di-t-butil-p-cresol e o benzilbenzoato. Os dois álcoois sesquiterpênicos espatulenol e (E)-nerolidol são encontrados comumente em óleos essenciais de B. dracunculifolia e aparecem na própolis de Ponta Grossa em baixas porcentagens, enquanto que os dois mencionados compostos aromáticos não são tão comuns em espécies do gênero Baccharis. As diversas análises de extratos e isolamentos demonstraram que dois ácidos aromáticos podem ser considerados como substâncias marcadoras das duas amostras de própolis analisadas. O ácido para-hidroxicinâmico mostrou-se característico da própolis de Ipiranga, enquanto que o ácido benzóico pode ser considerado típico da amostra de Ponta Grossa. As análises por espectrometria de absorção atômica que foram conduzidas com ambas as própolis estudadas não indicaram níveis elevados de metais e nem a presença de metais pesados inconvenientes, sendo mais uma garantia de que os produtores estão trabalhando em ambientes limpos quanto a este aspecto.
Capitoli di libri sul tema "P-Hydroxycinnamic acids"
Chammas, Sergio M., Juliana F. Sanchez, Rosely C. B. Alves, Lucas A. Giovannini e Durvanei A. Maria. "Bioactive compounds of rosemary from the field: a review of the biological effects". In COLLECTION OF INTERNATIONAL TOPICS IN HEALTH SCIENCE- V1. Seven Editora, 2023. http://dx.doi.org/10.56238/colleinternhealthscienv1-068.
Testo completoAtti di convegni sul tema "P-Hydroxycinnamic acids"
Ohindovschi, Angelica, e Maria Cojocaru-Toma. "Identification of phenolic compounds from extract of Galium verum". In Scientific seminar with international participation "New frontiers in natural product chemistry". Institute of Chemistry, Republic of Moldova, 2023. http://dx.doi.org/10.19261/nfnpc.2023.ab21.
Testo completo