Consulta: subjectFacets:"Aqueous extract"
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Efecto Tóxico del Extracto Acuoso de Ruta graveolens del Norte de México sobre el Hígado de Rata Wistar
Provedor de dados: 77
Autores: Serrano-Gallardo,Luis B; Soto-Domínguez,Adolfo; Ruiz-Flores,Pablo; Nava-Hernández,Martha P; Morán-Martínez,Javier; García-Garza,Rubén; Martínez-Pérez,Edith F.
A Ruta graveolens se le atribuyen propiedades benéficas en medicina tradicional, sin embargo se ha demostrado que también puede producir efectos adversos. A la fecha no existe evidencia que ratifique que R. graveolens es totalmente inofensiva, por este motivo el objetivo de este estudio fue determinar el efecto tóxico del extracto acuoso de las hojas de esta especie vegetal en hígado de rata. Se utilizaron 25 ratas Wistar y se dividieron en 5 grupos (n=5). El grupo 1 correspondió al grupo control negativo, el grupo 2 o control positivo se trató con 100 mg de dexametasona/kg/día. Los grupos 3 y 4 se trataron con 30 y 100 mg de extracto de R. graveolens respectivamente. Al grupo 5 se le administraron 100 mg de dexametasona/kg/día combinado con 100 mg de...
Tipo: Journal article
Palavras-chave: Ruta graveolens; Extracto acuoso; Toxicidad hepática; Ratas Wistar; Ruta graveolens; Aqueous extract; Liver toxicity; Wistar rats.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000300043

Assessment of biomedical and pharmacological activities of sea anemones Stichodactyla mertensii and Stichodactyla gigantea from Gulf of Mannar Biosphere Reserve, southeast coast of India
Provedor de dados: 80
Autores: Thangaraj,S; Bragadeeswaran,S.
Cnidarians comprise an old and diverse animal phylum, and possess a wide variety of biologically active substances. Sea anemones contain a diversity of interesting biologically active compounds including some potent toxins. In the present work, the sea anemones Stichodactyla mertensii and Stichodactyla gigantea, collected from the Mandapam coast, are characterized biomedically and pharmacologically. The crude protein was obtained by using methanol and aqueous extracts. The respective protein contents of S. mertensii and S. gigantea were found to be 2.10 µg/mL and 1.87 µg/mL. The methanol and aqueous extracts of S. mertensii and S. gigantea yielded six and nine bands by SDS-PAGE on 12% gel. In the hemolytic assay, both extracts exhibited hemolytic effect on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aqueous extract; Neurotoxicity; Mouse bioassay; Analgesic activity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000100007

Effect of neem extract on the cotton aphid
Provedor de dados: 86
Autores: Santos,Terezinha Monteiro dos; Costa,Nivânia Pereira; Torres,Adalci Leite; Boiça Júnior,Arlindo Leal.
The aphid Aphis gossypii Glover (Hemiptera: Aphididae), a harmful pest on cotton, causes direct damage, reducing plant vigor, and indirect damage by honeydew secretion and transmission of several viruses. Due to the problem of pesticide resistance, alternative techniques for chemical control, such as the use of natural insecticides, have been object of research. The effects of aqueous extracts of neem (Azadirachta indica A. Juss) seed powder on the development, survival and fecundity of A. gossypii were evaluated. Treatments consisted of neem seed powder in the concentrations of 23.8, 122.0, 410.0 and 1,410.0 mg/100 mL of distilled water. Mortality rate during the nymphal development for aphids maintained on cotton leaf discs treated with the two highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Insecta; Aphis gossypii; Azadirachta indica; Gossypium hirsutum; Aqueous extract.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2004001100003

Influence of Phenology and Post-Harvest Processing of Vegetal Material on the Allelopathy of Annoni Grass (Eragrostis plana) Extracts
Provedor de dados: 87
Autores: SCHEFFER-BASSO,S.M.; FIORENTIN,F. Jr. R.; FAVARETTO,A.
ABSTRACT: The phenological stage, post-harvest processing and quantity of material can interfere in the allelopathic activity of extracts. The objective of this study is to test the allelopathic effect of aqueous extracts of the leaves of Annoni grass (Eragrostis plana), an invader of natural pastures. Twelve extracts were prepared by combining the phenological stage of the plants when harvesting the leaves (vegetative; flowering), post-harvest processing before extraction (fresh; dry at 40 oC), and the amount of plant material (5, 15, and 25 g 100 mL-1 distilled water). Two bioassays were conducted in a germination chamber, with evaluation of germination and growth of seedlings of lettuce (Lactuca sativa) and white clover (Trifolium repens). The extracts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: South African lovegrass; Aqueous extract; Lactuca sativa; Methodology; Trifolium repens.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100213

Allelopathic effects of Eucalyptus citriodora on amaryllis and associated grassy weed
Provedor de dados: 87
Autores: El-Rokiek,K.G; Eid,R.A.
A Petri dish assay was carried out for screening different concentrations of aqueous extracts of fresh and dry leaves of Eucalyptus citriodora on germination and seedling growth of wild oat weed (Avena fatua). Seed germination, root and shoot length of wild oat exhibited different degrees of inhibition according to the concentration of the aqueous extract. Maximum inhibitions of germination percentage, root and shoot length were recorded when using 25% fresh leaf extract. Based on this preliminary work (Petri dish assay), studies were conducted under greenhouse conditions at the National Research Center, Egypt, in the two winter seasons of 2006/2007 and 2007/2008 to evaluate the effects of foliar and soil treatments of aqueous extracts of Eucalyptus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aqueous extract; Herbicide; Phytotoxic; Total phenols; Tralkoxydim.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582009000500002

Obtention of dry extract from aqueous extracts of Justicia pectoralis Jacq. (tilo)
Provedor de dados: 98
Autores: Rodríguez Chanfrau,Jorge Enrique; López Hernández,Orestes Dario; Núñez Figueredo,Yanier; Rodríguez Ferrada,Carlos; Nogueira Mendoza,Antonio.
Introduction: Justicia pectoralis Jacq. (Acanthaceae), is a medicinal species native to the American tropics. In Cuba it is used in folk medicine in the treatment of nervous disorders. The Cuban Pharmaceutical Industry is working on the development of technological processes for the obtention of pharmaceutical quality raw materials from natural products. Objectives: develop a technological process to obtain dry extract from aqueous extracts of J. pectoralis. Methods: a process to obtain dry extract by spray drying from aqueous extract of J. pectoralis was developed. The influence of solid-liquid r ratio and extraction time on coumarin content was evaluated by applying a response surface methodology (RSM). The drying process and later pharmacological...
Tipo: Journal article
Palavras-chave: Aqueous extract; Coumarin; Justicia pectoralis Jacq.; Response surface methodology; Pharmacological evaluation; Sedative activity; Spray drying.
Ano: 2013
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962013000400006

Allelopathic effects of Sonchus oleraceus L. on the germination and seedling growth of crop and weed species
Provedor de dados: 39
Autores: Gomaa,Nasr Hassan; Hassan,Mahmoud Omar; Fahmy,Gamal Mohammad; González,Luís; Hammouda,Ola; Atteya,Atteya Mostafa.
We assessed the allelopathic effects of the aqueous extract of Sonchus oleraceus dry shoots on the germination and seedling growth of Trifolium alexandrinum, three weed species (Brassica nigra, Chenopodium murale and Melilotus indicus) and S. oleraceus itself. We assayed four different concentrations of the aqueous extract (w v-1): 1%, 2%, 3% and 4%. To determine whether the effects of the extract were attributable to the presence of allelopathic compounds, its osmotic potential or both, we prepared concentrations of polyethylene glycol (PEG) with osmotic potentials equivalent to those of the aqueous extract. All concentrations of the plant extract completely inhibited the germination and seedling growth of C. murale. The lowest concentration of the plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allelochemicals; Aqueous extract; Bioherbicide; Phytotoxicity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000300014

Rapid green synthesis of silver nano particles from Ziziphus mauritiana and antibacterial activity against human pathogens
Provedor de dados: 3
Autores: Asha, Sivaji; Thirunavukkarasu, Palaniyandi.
A novel green source Ziziphus mauritiana fresh young leaves was opted to synthesize silver nanoparticles and analyze its antibacterial activity. The bioactive compounds present in the plant extracts reduced silver ions to NPs, indicated by change in color from red to dark brown. In this study, we have successfully synthesized nanoparticles using Z. mauritiana aqueous leaf extract as a reducing agent and the reaction process of synthesized nanoparticles was monitored by UV-Vis spectroscopy. The UV-Vis absorption peak showed maximum adsorption at 420 nm confirmed the silver nanoparticles synthesis. Further characterization was carried out by FTIR and the results recorded a downward shift of absorption the bands between 400 to 4000 cm-1 indicates the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aqueous extract; Silver nanoparticles; Anti-bacterial activity; Human pathogens.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/45262

Phytochemical Screening and Acute Toxicity of Aqueous Extract of Leaves of Conocarpus erectus Linnaeus in Swiss Albino Mice
Provedor de dados: 42
Autores: NASCIMENTO,DAYANE K.D.; SOUZA,IVONE A. DE; OLIVEIRA,ANTÔNIO F.M. DE; BARBOSA,MARIANA O.; SANTANA,MARLLON A.N.; PEREIRA JÚNIOR,DANIEL F.; LIRA,EDUARDO C.; VIEIRA,JEYMESSON R.C.
ABSTRACT Mangroves represent areas of high biological productivity and it is a region rich in bioactive substances used in medicine production. Conocarpus erectus (Combretaceae) known as button mangrove is one of the species found in mangroves and it is used in folk medicine in the treatment of anemia, catarrh, conjunctivitis, diabetes, diarrhea, fever, gonorrhea, headache, hemorrhage, orchitis, rash, bumps and syphilis. The present study aimed to investigate the acute toxicity of aqueous extract of leaves of C. erectus in Swiss albino mice. The plant material was collected in Vila Velha mangroves, located in Itamaracá (PE). The material was subjected to a phytochemical screening where extractive protocols to identify majority molecules present in leaves...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acute toxicity; Aqueous extract; Conocarpus erectus; Medicinal plants; Plants extracts.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401431

Cytogenotoxicity of Cymbopogon citratus (DC) Stapf (lemon grass) aqueous extracts in vegetal test systems
Provedor de dados: 42
Autores: Sousa,Saulo M.; Silva,Pâmela S.; Viccini,Lyderson F.
The lemon grass, Cymbopogon citratus (DC) Stapf, is an important species of Poaceae family commonly used in the folk medicine in many countries. The aim of this study was to investigate the cytotoxic and genotoxic effects of aqueous extracts from C. citratus leaves on Lactuca sativa (lettuce) root tip meristem cells by cytogenetic studies that have never been done before for lemon grass extracts. For this, lettuce seeds were treated for 72h with different concentrations of lemon grass aqueous extracts (5; 10; 20 and 30 mg/mL). The percentage of germination, root development and cellular behavior were analyzed, and the results showed that the highest concentration of aqueous extracts reduced the mitotic index, the seed germination and the root development...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aqueous extract; Cybopogon citratus; Cytotoxic effect; Genotoxic effect; Lactuca sativa.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000200006

Effect of an aqueous extract of annatto (Bixa orellana) seeds on lipid profile and biochemical markers of renal and hepatic function in hipercholesterolemic rats
Provedor de dados: 52
Autores: Paula,Heberth de; Pedrosa,Maria Lúcia; Rossoni Júnior,Joamyr Victor; Haraguchi,Fabiano Kenji; Santos,Rinaldo Cardoso dos; Silva,Marcelo Eustáquio.
Annatto extract is a natural food color obtained from the outer coatings of the seeds of the Annatto tree (Bixa orellana L.). This is the first report in the literature that shows the relationship between the aqueous annatto extract and its influence on lipid profile in animals. Male Fisher rats were divided into three groups (n=12): C group, fed standard diet and water; H group, fed high-lipid diet and water and; HU group, with high-lipid diet and aqueous annatto extract for 60 days. The treatment with annatto extract in animals fed with the high-lipid diet lowered the LDL- and total cholesterol and raised the HDL-cholesterol, suggesting a hypocholesterolemic effect. Neither high-fat diet nor aqueous annatto extract had any significant effect on serum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annatto; Bixa orellana; Cholesterol; Rat; Aqueous extract; Lipid profile.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000600008

Aqueous extract of Huang-lian induces apoptosis in lung cancer cells via P53- mediated mitochondrial apoptosis
Provedor de dados: 52
Autores: Zhu,Deying; Lin,Zhe; Li,Zhenzhong.
The current study was designed to evaluate the activity of the aqueous extract of Huang-lian, and the main apoptosis pathway induced by the extracts of Huang-lian was detected on lung cancer. Antiproliferactive activity was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and TUNEL methods against human lung cancer cells (A549). Huang-lian regulated the Bcl-2 family protein-mediated mitochondrial pathway via p53 and was detected by western blot. It increased the activation of caspase-3 and caspase-3 cleavage increased as the time increased. These results suggested that Huang-lianregulated the Bcl-2 family protein-mediated mitochondrial via p53 pathway, suggesting that Huang-lian should be further investigation as a natural...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Huang-lian; Aqueous extract; Apoptosis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000300353

Aqueous Extract of Terminalia chebula Induces Apoptosis in Lung Cancer Cells Via a Mechanism Involving Mitochondria-mediated Pathways
Provedor de dados: 52
Autores: Wang,Meiling; Yang,Limin; Ji,Musi; Zhao,Pengwei; Sun,Peng; Bai,Ruixia; Tian,Yunpeng; Su,Liping; Li,Cunbao.
The current study was designed to evaluate the aqueous extract of Terminalia chebula activity, and the main pathway was detected on lung cancer by extracts of T. chebula. Aqueous extract of T. chebula was separated using a zeolite, and five fractions of T. chebula extract were obtained and analyzed by ultraviolet (UV) and infrared (IR) spectroscopy. Antiproliferative activity was evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) methods against human lung cancer (A549) and mouse lung cancer cell line LLC. T. chebula acts by regulating the Bcl-2 family protein-mediated mitochondrial pathway detected by western blot. Fraction 4 of the T. chebula extract showed much function and was thus studied further. Fraction 4 increased the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: T. chebula; Aqueous extract; Infrared spectroscopy; Apoptosis.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000200208

Nitrogen fertilization sources and insecticidal activity of aqueous seeds extract of Carica papaya against Spodoptera frugiperda in maize
Provedor de dados: 118
Autores: Figueroa-Brito,Rodolfo; Villa-Ayala,Patricia; López-Olguín,Jesús F; Huerta-de la Peña,Arturo; Pacheco-Aguilar,Juan R; Ramos-López,Miguel A.
R. Figueroa-Brito, P. Villa-Ayala, J.F. López-Olguín, A. Huerta-de la Pena, J.R. Pacheco-Aguilar, and M.A. Ramos-López. 2013. Nitrogen fertilization sources and insecticidal activity of aqueous seeds extract of Carica papaya against Spodoptera frugiperda in maize. Cien. Inv. Agr. 40(3): 567-577. The damage caused by the fall armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) to vegetative-stage maize cultivated with chemical nitrogen fertilizers, vermicompost, and Carica papaya L. (Caricaceae) seed extract was estimated. Each shoot was infested with one first instar larva of S. frugiperda. The variables measured included the percentage of germination, length of the second and fifth leaves, stem diameter and plant height, and the estimation of...
Tipo: Journal article
Palavras-chave: Aqueous extract; Caricaceae; Chemical fertilizers; Damage; Fall armyworm; Spodoptera frugiperda.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300009

Pathogen control using a natural Chilean bee pollen extract of known botanical origin
Provedor de dados: 118
Autores: Cabrera,Carol; Montenegro,Gloria.
Bee pollen is a product from beehives that is contained in corbiculae, generally monospecific and is currently considered as a functional food due to its nutritional and medicinal properties. This study investigates the antimicrobial activity of a Chilean bee pollen extract of known botanical origin. The botanical origin of the pollen was determined by palynological analysis, and then an aqueous extract was prepared. The antibacterial properties of the extract were evaluated on human infectious agents (Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Streptococcus pyogenes) using a qualitative method (agar diffusion) and a quantitative method (minimum inhibitory and bactericide concentration) and on agricultural pathogens (Alternaria...
Tipo: Journal article
Palavras-chave: Antimicrobial activity; Bee pollen; Aqueous extract.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100020

Effect of an infusion of canelo and bitter lupin on Aegorhinus superciliosus adults
Provedor de dados: 118
Autores: Quintana,Romina; Palma,Alexis; Rebolledo,Ramón; Aguilera,Alfonso.
A. superciliosus (Coleoptera: Curculionidae), known as "cabrito del maitén" (CM) among other names, is an important pest affecting fruit-bearing bushes in southern and central southern Chile. One means of control is the use of organically synthesized insecticides that target the adult, the application of which generally is disadvantageous because these insecticides have long-lasting residual effects and because spraying coincides with flowering and the harvest of the fruit. To complement other pesticides that are more degradable and selective and less harmful to the environment, this work studied the effect of an infusion of canelo buds (Drimys winteri) with leaves and stems of bitter lupin (Lupinus albus) on CM adults. The research evaluated mortality,...
Tipo: Journal article
Palavras-chave: Aegorhinus superciliosus; Aqueous extract; Drimys winteri; Lupinus albus.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000300009