|
|
|
| Registros recuperados: 415 | |
|
|
| Sacristán,M; Millanes,Am; Fontaniella,B; Legaz,Me; Vicente,C. |
| Secreted arginases from Evernia prunastri and Xanthoria parietina thalli, exhibiting lectin activity, have been purified to homogeneity. Analyses of both amino acid and glycoside composition are reported. Purified proteins have been subjected to tryptic digestion and some amino acid sequences have been analyzed. An undecapeptide from Evernia arginase, which shows some degree of homology with the domain to which Mn²+ binds, a heptapeptide and an undecapeptide from Xanthoria arginase have been analyzed, and homologies with some arginases from other fungi and plants have been found. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Evernia prunastri; Xanthoria parietina; Arginases; Lectins; Structure analysis. |
| Ano: 2008 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572008000100021 |
| |
|
| |
|
|
| Gul,B; Islam,M; Ahmad,S; Gul,S. |
| Spatial and temporal patterns of aboveground biomass and nutritive value of rangeland species with respect to the influence of grazing and soil moisture were investigated. The research was conducted during two years at the Tomagh Research Station, near Sanjawi, Ziarat District, Balochistan, Pakistan. This area is protected from grazing since 1998; however, some of the area is open for grazing. Tree sites were selected for research purposes: a protected plain, a protected hilly, and an unprotected plain grazed area. Sampling was carried out during the spring, summer and autumn seasons. Results revealed that soil moisture was greater at the protected than unprotected sites. The aboveground plant biomass was 66% to 76% lower at unprotected than protected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rangeland; Biomass production; Season; Semiarid; Grazing; Grass. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100013 |
| |
|
|
| Yang,FW; Feng,XQ. |
| Abscisic acid (ABA) plays a series of significant physiology roles in higher plants including but not limited to promote bud and seed dormancy, accelerate foliage fall, induce stomatal closure, inhibit growth and enhance resistance. Recently, it has been revealed that ABA also has an important regulator role in the growth, development and ripening of fruit. In higher plants ABA is produced from an indirect pathway from the cleavage products of carotenoids. The accumulation of endogenous ABA levels in plants is a dynamic balance controlled by the processes of biosynthesis and catabolism, through the regulation of key ABA biosynthetic gene and enzyme activities. It has been hypothesized that ABA levels could be part of the signal that trigger fruit ripening,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abscisic acid (ABA); Biosynthesis; Catabolism; Regulation; Fruit; Ripening. |
| Ano: 2015 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000200025 |
| |
|
|
| Juárez-Maldonado,A; Rosales-Velázquez,JL; Ortega-Ortiz,H; Cabrera-De-la-Fuente,M; Ramírez,H; Benavides-Mendoza,A. |
| Nanotechnology is currently an important worldwide study field because it provides control on matter at a nanometric scale. In food and agricultural fields, the applications of this technology are in early stages. Onion is one of the main vegetables grown in the world. Onion is a low calorie food which contains a large amount of flavonoids. In this work, silver nitrate application in onion was evaluated. An onion crop was developed at the University Antonio Narro in Saltillo, Mexico. Two methods of silver nitrate application were used (a nutritive solution: 0, 20, 40 and 80 mg/L of AgNO3; and foliar spray: 0, 20 and 40 mg/L of AgNO3). The samples were taken at 30, 60 and 90 days after transplanting. Total antioxidant capacity, silver accumulation and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nanotechnology; Onion; Silver nitrate; Nanoparticles. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100013 |
| |
|
|
| Oranday,MA; Verde,MJ; Martínez-Lozano,SJ; Waksman,NH. |
| A bioassay-directed is utilized to detect substances with biological activity from Gracilaria tikvahiae, Ulva lactuca, Ulva fasciata and Sargassum fluitans. In a preliminary assessment, polar and non polar extracts of four species of marine protoctist form were screened for antibacterial and antifungal properties against seven microorganisms by the diffusion method, non polar extracts of Sargassumfluitans,and polar extracts of Gracilaria tikvahiae inhibited the growth of more than four microorganisms. Extracts were separated using chromatography column and fractions were tested againstStapylococcusaureus andCandida albicans. The eighty fraction of petroleum ether of S. fluitans exhibited high activity against C.albicans, MIC 0.16 µg/mL. |
| Tipo: Info:eu-repo/semantics/article |
|
| Ano: 2004 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100020 |
| |
|
| |
|
|
| Montenegro,G; Salas,F; Peña,RC; Pizarro,R. |
| En mieles monoflorales de la especie chilena Quillaja saponaria se detectaron los compuestos fenólicos: ácido cumárico y ácido salicílico, la flavona naringenina y el flavonol kaempferol, utilizando cromatografía líquida de alta resolución. Estos extractos mostraron actividad antibacteriana contra Pseudomonas aureginosa, Escherichia coli, Staphylococcus typhi, S. aureus, Streptococcus pneumoniae tipo β, y Vibrio cholerae, y actividad antifúngica contra la levadura Candida albicans. En el extracto etanólico, adicionalmente, se identificaron algunos compuestos del aroma y de descomposición. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Miel; MIC; Quillaja saponaria; Manuka; Flavonas; Ácidos fenólicos; Compuestos fenólicos. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000200010 |
| |
|
|
| Romero-Castillo,PA; Pérez Amador Barron,MC; Guevara Fefer,P; Muñoz Ocotero,V; Reyes Dorantes,A; Aguirre Garcia,F; Amaya Chavez,A. |
| Actualmente se ha despertado el interés científico por la búsqueda de nuevos fármacos con actividad antiinflamatoria, con menos efectos colaterales de los ya existentes en el mercado. En este sentido, las plantas medicinales pueden ser una fuente natural alternativa, como es el caso de Ziziphus amole (Sessé & Moc.) M.C. Johnst. o coróngoro, nativo de México. Se emplea en la medicina tradicional como antiinflamatorio, cicatrizante, analgésico, antidiarreico, en diabetes, asma y hemorroides. El objetivo del presente trabajo fue evaluar el efecto antiinflamatorio de los extractos crudos del coróngoro Z. amole en el modelo de inflamación aguda en edema auricular inducido por 13-acetato-12-O-tetradecanoilforbol (TPA) en ratón, y la actividad... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coróngoro; Ziziphus amole; Modelo biológico; Edema auricular; 13-acetato-12-O-tetradecanoilforbol (TPA); Mieloperoxidasa (MPO). |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572013000100011 |
| |
|
| |
|
| |
|
| |
|
|
| Espinoza Sánchez,EA; Silos Espino,H; Flores Benitez,S; Valera Montero,LL; Rodríguez Salazar,E; Gallegos Vázquez,C; Guevara Lara,F; González Chavira,M; Guzmán Maldonado,HS. |
| Para contribuir al conocimiento de la diversidad genética del nopal se analizaron 85 genotipos representativos de Opuntia (silvestres y cultivados) por medio de la técnica de AFLPs y características del fruto. El análisis de AFLPs con los iniciadores Mse ICAC/Eco RI-AAG generaron más fragmentos polimórficos (57,5 en promedio) por genotipo; se obtuvo un dendrograma que no mostró una clara relación de acuerdo a la taxonomía conocida. En complemento al perfil genético, y para permitir una referencia morfológica o química directa, agrupamos a los genotipos de acuerdo al contenido de °Brix de sus frutos, debido a que esta es una característica primordial para su identificación visual y aprovechamiento de consumo directo. Se... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caracterización Molecular; Opuntia; AFLP; Dendrograma; Morfología del fruto. |
| Ano: 2014 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200010 |
| |
|
|
| Pérez-Amador,MC; Muñoz Ocotero,V; García Castañeda,JM; González Esquinca,AR. |
| A comparison was made between plants of Solanum torvum Sw that grow in Chiapas, Mexico, and plants of the same species originating from India. This was effected to establish either similarities or differences between these plants in total alkaloid contents and presence of solasodine, an important alkaloid for the partial synthesis of steroids. The total alkaloid content (0.12%) of the plants coming from Chiapas and India was the same. However, solasodine was found only in the plants of Chiapas. In addition, the total amount of glycoalkaloids (0.038%) and two glycosilated compounds derived from solasodine, solasonine (0.0043%) and solamargine (0.0028%), were determined. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Solanaceae; Solanum torvum; Alkaloids; Solasodine; Solamargine. |
| Ano: 2007 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572007000100004 |
| |
|
|
| Shang,ZH; Xu,SG. |
| Abstract. Pedicularis kansuensis is a dominating poisonous weed, and it might have allelopathic effects on other native grasses in alpine meadows. An experiment was conducted to examine a range of concentrations of aqueous whole plant extracts (25, 12.5, 2.5, 1.25, 0.25 and 0.0 g/L) of P. kansuensis, prepared at the flowering stage on seed germination and seedling growth of two native grasses (Poa pratensis and Elymus nutans). High concentrations of aqueous extracts of P. kansuensis inhibited seed germination and seedling growth of P. pratensis (p< 0.05). Most aqueous extracts of P. kansuensis had a stimulatory (p< 0.05) effect on E. nutans. Our results suggest that the allelopathic ecology of P. kansuensis on other native grasses needs further... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological allelopathy; Aqueous extracts; Weeds; Native grasses; Alpine meadows. |
| Ano: 2012 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572012000100011 |
| |
|
|
| Liu,M; Liang,Z-W; Huang,L-H; Wang,M-M; Yang,H-Y. |
| Saline-sodic stress is a major abiotic constraint responsible for rice (Oryza sativa L.) yield reductions in Northeast China. The rice root system is crucial for yield development, and it is usually recognized as the key for improving future crop productivity. However, most of the saline-sodic soils in these areas contain high levels of soluble Na2CO3 and NaHCO3, which results in a high pH (>8.5), clay dispersion, soil swelling, and overall poor soil physical properties. Isolation, washing and measurement of the rice crown roots is highly time-demanding in this kind of soil. Our aim was to explore whether differences in shoot characters could be reliable indicators, and a low cost and easy method for estimating crown root numbers in rice. In this... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saline-sodic soil; Oryza sativa L; Crown root; Sampling time; Estimation method. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100022 |
| |
|
|
| Sadia¹,B; Josekutty,PC; Potlakayala,SD; Patel,P; Goldman,S; Rudrabhatla,SV. |
| A robust protocol for culturing meristems of Sorghum is required to assist with rapid genetic improvement of the genus. Through meristem culture, an efficient method for rapid micropropagation was developed for Sorghum bicolor (L.) Moench. hybrids, namely NC+262, NC+6C21 and NC+6B50. Complete plants were regenerated directly from shoot meristems without an intervening callus phase. Regeneration frequencies varied between the studied genotypes and according to the growth regulator combinations present in the medium. The combination of BAP and TDZ showed a synergistic effect on shoot multiplication. The highest number of shoots per meristem (68 ± 2) was recorded for the genotype NC+262, followed by NC+6C21 (31.3 ± 0.8), and NC+6B50 (16 ± 1.7). MS medium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Micropropagation; Sorghum bicolor; Tissue culture; Genetic improvement; Genotypes. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200010 |
| |
|
| |
|
|
| Orozco-Vidal,JA; Yescas-Coronado,P; Segura-Castruita,MA; Valdez-Cepeda,R; Martínez-Rubín de Celis,E; Montemayor-Trejo,JA; Fortis-Hernández,M; Preciado-Rangel,P. |
| El desarrollo de tres variedades de algodón, dos de hoja normal (CIAN Precoz y la transgénica NuCotton 35B) y una de hoja okra (Fiber Max 832), fue evaluado mediante la técnica del análisis de crecimiento. El objetivo de esta investigación fue determinar la dinámica de crecimiento y la eficiencia de producción y distribución de biomasa en tres variedades de algodón a partir de muestreos vegetativos y reproductivos efectuados en diferentes días después de la siembra (dds). La siembra se realizó en el sistema de producción de surcos estrechos (0,76 m entre surcos, y 0,20 m entre plantas) para obtener una población de 65500 plantas/ha. Las variedades se distribuyeron en un diseño experimental de bloques al azar con seis repeticiones. En cuatro fechas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tasa de crecimiento; Tasa de asimilación neta; Fotoasimilados; México árido. |
| Ano: 2011 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572011000100007 |
| |
|
| |
| Registros recuperados: 415 | |
|
|
|
