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| Registros recuperados: 17 | |
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| França,Solange Maria de; Oliveira,José Vargas de; Esteves Filho,Alberto Belo; Oliveira,Cynara Moura de. |
| The effects of tangerine (Phaseolus vulgaris Blanco), lemon (Citrus medica limonum Lush), pear orange (Citrus sinensis L. Osbeck), red copaiba (Copaifera langsdorffii Desf.), rosemary (Baccharis dracunculifolia De Candole), Eucalyptus (Eucalyptus globulus Labillardière and E. citriodora Hook), lemongrass (Cymbopogon citratus Stapf.) and citronella (Cimbopogon nardus Linnaeus) oils at several concentrations on Zabrotes subfasciatus (Boheman) were studied. In toxicity tests, grains of Phaseolus vulgaris L. cv. Rajadinho were impregnated with oils and infested with adults of Z. subfasciatus up to 24 hours old. All tested oils were effective in reducing the viable egg-laying and adult emergence of this pest, in function of the concentrations used, highlighting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Botanical insecticides; Bean weevil; Bioactivity; Behavioral effect. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672012000300010 |
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| Zohra,Houari Fatima; Ramazan,Erenler; Ahmed,Hariri. |
| ABSTRACT In the present study, the phytochemical composition, antioxidant and anti-hemolytic activities of root and aerial part Rubia tinctorum hydromethanolic extracts were investigated. Phytochemical screening reveals the presence of phenol, alkaloids, coumarin, flavonoids, and tannins in both extracts. LC-ESI-MS/MS analysis showed the presence of 15 and 17 components in the root and the aerial part extracts, respectively. The quantitative analysis indicates the richness of root extracts in phenolic compounds (118.38 mg GAE/g) and flavonoids (45.29±0.04 mg GAE/g), the aerial part extract has the highest levels in tannins (134.1±0.1 mg GAE/g). Besides, aerial part extracts revealed the highest antioxidant activity for DPPH (83.23 %) and FRAP (1.51±0.22),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioactivity; Chemical composition; Free radical; Rubia tinctorum L. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2022000300403 |
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| Andrade, Lígia Helena de; Universidade Federal Rural de Pernambuco; Oliveira, José Vargas de; Universidade Federal Rural de Pernambuco; Breda, Mariana Oliveira; Universidade Federal Rural de Pernambuco; Marques, Edmilson Jacinto; Universidade Federal Rural de Pernambuco; Lima, Iracilda Maria de Moura; Universidade Federal de Alagoas. |
| Botanical insecticides have been studied aiming the alternative pest control. The present study investigated the effects of these insecticides on the instantaneous population growth rate (ri) of Aphis gossypii. Botanical insecticides were tested in the following concentrations: Compostonat®, Rotenat-CE® and Neempro (0, 0.50, 0.75, 1.00, 1.25, 1.50 and 1.75%); Natuneem® and Neemseto® (0, 0.25, 0.50, 0.75 and 1.00%) and essential oils of Foeniculum vulgare Mill., Cymbopogom winterianus (L.), Chenopodium ambrosioides L. and Piper aduncum L (0, 0.0125, 0.025, 0.0375 and 0.05%). Cotton leaf discs, CNPA 8H cultivar with 5 cm in diameter were immersed for 30 seconds in products broth and dried for 30 minutes. Eight replicates per concentration were used and each... |
| Tipo: Pesquisa de laboratório |
Palavras-chave: Agronomia / Fitossanidade cotton aphid; Bioactivity; Gossypium hirsutum; Natural insecticides Entomologia Agrícola. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/10863 |
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| Jaramillo-Colorado, Beatriz Eugenia; Suarez-López , Samyr; Marrugo-Santander, Vanessa. |
| The objectives of this work were the study of the volatile chemical composition of essential oils (EO’s) from Bursera graveolens obtained in the locality of Malagana, municipality of Mahates, Bolívar, Colombia, as well as to evaluate their repellent and fumigant properties. EO’s were extracted by hydro-distillation and characterized by gas chromatography-mass spectrometry (GC-MS). The major compounds found in B. graveolens were limonene (42.2%), pulegone (20.9%), carvone (7.5%), caryophyllene (4.1%), and trans-carveol (3.8%). The repellent activity of EO’s was determined by the area preference method, where the EO of B. graveolens presented repellent activity against the Tribolium castaneum weevil at a concentration of 1 at 2% and 4 hours of exposure (88.1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gas chromatography; Bioactivity; Essential oils; Bursera graveolens; Tribolium castaneum; Terpenes.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46822 |
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| Gomathi,Ajitha; Gothandam,K M. |
| ABSTRACT Extending over decades, research has been of great focus and enormous progress on exploring the ocean for natural products from marine actinobacteria. Attraction towards alternative medicine has led to improvements in natural product discovery. With great potential to survive in extreme environments, marine actinobacteria, efficiently produce an array of metabolites with diverse bioactivity by evolving the secondary metabolic pathways. Exploiting the secondary metabolite producing potential of actinobacteria, many compounds with antitumor, antibacterial, antifungal, antimalarial, antiprotozoal, antiparasitic, antiviral, anti-parasitic, anti-inflammatory activities has been discovered. Efforts in bioprospecting alternative sources of natural... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Marine actinobacteria; Bioactivity; Antitumor compounds. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100343 |
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| Manzur,María J.; Muñoz,Rosana V.; Lucero,Adrián A.; Juri Ayub,Maximiliano; Alvarez,Sergio E.; Ciuffo,Gladys M.. |
| For biotechnological purposes, protein expression refers to the directed synthesis of large amounts of desired proteins. The aim of the present work was to produce reverse transcriptase Moloney murine Leukaemia Virus retro-transcriptase and Taq DNA polymerase, as bioactive products. In the present paper, we report the preparation of recombinant enzymes, expressed in E. coli strains. The enzymes produced exhibited quite good activity, compared with commercial enzymes, allowing us to replace the last ones for several lab applications. We are reporting changes and modifications to standard protocols described. The standard protocols were modified, i.e. for the purification step of Taq, a temperature dependent procedure was designed. The enzymes produced were... |
| Tipo: Journal article |
Palavras-chave: Bioactivity; Protein expression; Purification; Recombinant enzymes. |
| Ano: 2006 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300023 |
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| Zykwinska, Agata; Marquis, Melanie; Godin, Mathilde; Marchand, Laetitia; Sinquin, Corinne; Garnier, Catherine; Jonchere, Camille; Chedeville, Claire; Le Visage, Catherine; Guicheux, Jerome; Colliec-jouault, Sylvia; Cuenot, Stephane. |
| Articular cartilage is an avascular, non-innervated connective tissue with limited ability to regenerate. Articular degenerative processes arising from trauma, inflammation or due to aging are thus irreversible and may induce the loss of the joint function. To repair cartilaginous defects, tissue engineering approaches are under intense development. Association of cells and signalling proteins, such as growth factors, with biocompatible hydrogel matrix may lead to the regeneration of the healthy tissue. One current strategy to enhance both growth factor bioactivity and bioavailability is based on the delivery of these signalling proteins in microcarriers. In this context, the aim of the present study was to develop microcarriers by encapsulating... |
| Tipo: Text |
Palavras-chave: Exopolysaccharide; Growth factor; Microparticles; Microfluidics; Bioactivity. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00477/58882/61432.pdf |
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| Messina, Concetta Maria; Troia, Angelo; Arena, Rosaria; Manuguerra, Simona; Ioannou, Theodora; Curcuraci, Eleonora; Renda, Giuseppe; Hellio, Claire; Santulli, Andrea. |
| n this study we focused on four taxa of the genus Calendula (C. maritima, C. suffruticosa subsp. fulgida, C. arvensis, and the hybrid between the first two ones), collected in Mediterranean area (Sicily). Six extracts for each species were obtained using solvents with increasing polarity (hexane, ethanol 80%, acetone 70%, and water) and through extraction by supercritical fluids (SFE). It has been observed that the solvent with the highest extraction efficiency was ethanol 80% for all species. However, SFE extracts showed high antioxidant activity comparable to the ethanol 80% extract (polyphenol, DPPH, and reducing power method). These findings were confirmed by in vitro analysis (MTT assay) where it was observed that the tested concentration (24 µg/mL),... |
| Tipo: Text |
Palavras-chave: Calendula species; Marigold; Supercritical fluid extraction; Bioactivity; Antioxidants; Polyphenols. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00591/70336/68389.pdf |
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| Geiger, Marie; Desanglois, Gwenaelle; Hogeveen, Kevin; Fessard, Valerie; Lepretre, Thomas; Mondeguer, Florence; Guitton, Yann; Herve, Fabienne; Sechet, Veronique; Grovel, Olivier; Pouchus, Yves-francois; Hess, Philipp. |
| Pinnatoxin G (PnTX-G) is a marine toxin belonging to the class of cyclic imines and produced by the dinoflagellate Vulcanodinium rugosum. In spite of its strong toxicity to mice, leading to the classification of pinnatoxins into the class of “fast-acting toxins”, its hazard for human health has never been demonstrated. In this study, crude extracts of V. rugosum exhibited significant cytotoxicity against Neuro2A and KB cells. IC50 values of 0.38 µg mL−1 and 0.19 µg mL−1 were estimated on Neuro2A cells after only 24 h of incubation and on KB cells after 72 h of incubation, respectively. In the case of Caco-2 cells 48 h after exposure, the crude extract of V. rugosum induced cell cycle arrest accompanied by a dramatic increase in double strand DNA breaks,... |
| Tipo: Text |
Palavras-chave: Dereplication; Cyclic imine; HRMS; Bioactivity; Pinnatoxins. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00156/26723/24802.pdf |
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| Dan,H.A.; Dan,L.G.M.; Barroso,A.L.L.; Procópio,S.O.; Oliveira JR.,R.S.; Silva,A.G.; Lima,M.D.B.; Feldkircher,C.. |
| The sorghum is a kind of prominence before the cultures used in succession in the Brazil. However, little information concerning the effects of residual activity of herbicides on the crop in this region are known. The objective of this study was to evaluate the residual activity of herbicides used in weed management in soybeans as well as check their effects on grain sorghum grown in succession. For the field experiment, we used a randomized block design with four replications. Eight herbicide treatments were evaluated: imazaquin (0,161 kg ha-1), diclosulam (0,035 kg ha-1), sulfentrazone (0,600 kg ha-1) and flumioxazin (0,05 kg ha-1) in applications made before emergency and chlorimuron-ethyl (0,015 kg ha-1), imazethapyr (0,060 kg ha-1), imazethapyr (0,100... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carryover; Sorghum bicolor; Glycine max; Bioactivity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000500016 |
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| BASHIR,S.; JABEEN,K.; IQBAL,S.; JAVED,S.; NAEEM,A.. |
| ABSTRACT: In the current study phytochemical analysis and in vitro antifungal potential of fruits, leaves and stem of Lantana camara L. were studied. The phytochemical analysis indicated the presence of alkaloids, flavonoids, tannins, saponins, glycosides and terpenoids in fruit, stem and leaves of L. camara. The in vitro antifungal activity of fruit, stem and leaves of L. camara was tested against Colletotrichum gloeosporioides Penz. Different concentrations (1-5%) of methanolic extract of all the selected parts of L. camara were applied in vitro against the test fungus. The results of in vitro experiment revealed that higher concentration of methanolic fruit extract (5%) significantly reduced the biomass C. gloeosporioides up to 66%. This effective... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anthracnose; Bioactivity; Colletotrichum gleosporioides; GC-MS; Phytochemicals. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100167 |
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| Silva,Alexandre Christofaro; Canellas,Luciano Pasqualoto; Olivares,Fábio Lopes; Dobbss,Leonardo Barros; Aguiar,Natalia Oliveira; Frade,Daniele Ângela Rossinol; Rezende,Carlos Eduardo; Peres,Lázaro Eustáquio Pereira. |
| Peats are an important reserve of humified carbon in terrestrial ecosystems. The interest in the use of humic substances as plant growth promoters is continuously increasing. The objective of this study was to evaluate the bioactivity of alkaline soluble humic substances (HS), humic (HA) and fulvic acids (FA) isolated from peats with different decomposition stages of organic matter (sapric, fibric and hemic) in the Serra do Espinhaço Meridional, state of Minas Gerais. Dose-response curves were established for the number of lateral roots growing from the main plant axis of tomato seedlings. The bioactivity of HA was greatest (highest response in lateral roots at lowest concentration) while FA did not intensify root growth. Both HS and HA stimulated root... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Physiological effects; Bioactivity. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500015 |
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| Araújo,Alice M. N. de; Oliveira,José V. de; França,Solange M.; Navarro,Daniela M. do A. F.; Barbosa,Douglas R. e S.; Dutra,Kamilla de A.. |
| ABSTRACT This study had the following objectives: to identify and quantify the constituent compounds of essential oils from Cymbopogon winterianus Jowitt, Eucalyptus globulus Labill., Eucalyptus staigeriana F. Muell. ex F.M. Bailey, Foeniculum vulgare Mill., Ocimum basilicum L., Ocimum gratissimum L., and Piper hispidinervum C. DC., investigate their toxicity and repellency to S. zeamais and evaluate the toxicity of P. hispidinervum to immature S. zeamais. Individual tests for each essential oil were conducted with a completely randomized design with five concentrations for each oil and four replicates. Gas chromatography-mass spectrometry revealed the presence of citronellal in C. winterianus, 1,8-cineole in E. globulus, limonene in E. staigeriana,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternative fumigant; Bioactivity; Lethal concentration; Maize weevil; Natural insecticide. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000500372 |
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| Busato,Jader Galba; Zandonadi,Daniel Basílio; Dobbss,Leonardo Barros; Façanha,Arnoldo Rocha; Canellas,Luciano Pasqualoto. |
| Plant growth promoting substances are widely used in modern agriculture. Several products in the market are humic substances isolated from different sources. The filter cake, a residue of sugar production, is a rich and renewable source of organic matter and these characteristics place the filter cake as a possible source of plant growth promoting substances. Humic acids (HA) from filter cake were characterized, and their effects as root growth promoters were evaluated. Chemical features of the HA were evaluated through elemental composition, acidic functional groups, E4/E6 ratio and infrared spectroscopy analyzes. The biological activity of the HA was assessed using root architecture parameters and the P-type H+-ATPase activity. The lateral root... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: H+-ATPase; Brazil; Industrial residues; Physiological effects; Bioactivity. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000200012 |
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| Registros recuperados: 17 | |
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