Results 11 to 20 of about 1,323 (116)

Biosynthesis of Silver Nanoparticles Using Black Pepper (Piper nigrum) Seed Extract and Evaluation of Their Cytotoxicity. [PDF]

Chem Biodivers
This study reports the green biosynthesis of piperine‐functionalized silver nanoparticles from Piper nigrum seed extract, followed by comprehensive physicochemical characterization and in vitro cytotoxic evaluation. The results confirm successful nanocomposite formation and demonstrate a marked enhancement of cytotoxic activity against gastric cancer ...
Maciel NF, do Lago GV, da Silva Pereira GV, de Farias Ramos IN, Bastos AC, Barreto IAR, Moraes NS, Dos Santos MN, Pereira da Rocha JA, Machado AK, Junior WGP, da Silva Pessoa MM, Uesugi MNM, Khayat AS, Cruz JN, do Rêgo JA, Joele MRSP, Brasil DDSB.   +17 more
europepmc   +2 more sources

Beyond species means – the intraspecific contribution to global wood density variation [PDF]

New Phytol
Summary Wood density is central for estimating vegetation carbon storage and a plant functional trait of great ecological and evolutionary importance. However, the global extent of wood density variation is unclear, especially at the intraspecific level. We assembled the most comprehensive wood density collection to date, including 109 626 records from
Fischer FJ, Chave J, Zanne A, Jucker T, Fajardo A, Fayolle A, de Lima RAF, Vieilledent G, Beeckman H, Hubau W, De Mil T, Wallenus D, María Aldana A, Alvarez-Dávila E, Alves LF, Apgaua DMG, Arcanjo F, Bastin J, Bilous A, Birnbaum P, Blyshchyk V, Borah J, Boukili V, Camarero JJ, Casas L, Gatti RC, Chambers JQ, Fabiano EC, Choat B, Conti G, Cornwell W, Dar JA, Das AK, Dobler M, Dougabka D, Edwards DP, Evans R, Falster D, Fearnside P, Flores O, Fyllas N, Gérard J, Goodman RC, Guibal D, Henao-Diaz LF, Hervé V, Hietz P, Homeier J, Ibanez T, Ilic J, Jansen S, Kalita RM, Kenzo T, Kindermann L, Kothandaraman S, Kotowska M, Kubota Y, Langbour P, Lawson J, de Lima ALA, Link RM, Linstädter A, López R, Macinnis-Ng C, Magnago LFS, Martin AR, Matheny AM, McCarthy JK, Miller RB, Nath AJ, Nelson BW, Njana M, Nogueira EM, Oliveira A, Oliveira R, Olson M, Onoda Y, Paul K, Piotto D, Radtke P, Razafindratsima O, Ramananantoandro T, Read J, Richardson S, de la Riva EG, Rodríguez-Reyes O, Rolim SG, Rolo V, Rosell JA, Salguero-Gómez R, Santini NS, Schuldt B, Schwendenmann L, Sellin A, Staples T, Stevenson PR, Sundarapandian S, van der Sande MT, Thibaut B, Tng DYP, Torezan JMD, Villanueva B, Weiskittel A, Wells J, Wright SJ, Zieminska K.   +105 more
europepmc   +3 more sources

Surface textures of detrital pyroxenes in coastal dune sands (western Gulf of Mexico, Mexico): Implications for their preservation and geoenvironmental processes

The Depositional Record, Volume 9, Issue 4, Page 789-809, November 2023., 2023
Breakage along cleavage surfaces and little abrasion in clinopyroxene grains occurs after fluvial, marine and aeolian transport. Compactness measurements are an alternative shape descriptor to determine the morphology of minerals. Abstract This work investigates how the surface textures and morphology of pyroxene grains evolve during their source‐to ...
Juan J. Kasper‐Zubillaga, Raymundo Gerardo Martínez‐Serrano, David M. Buchs, Mauricio Mendieta‐Lora, Elsa Arellano‐Torres, León Felipe Álvarez‐Sánchez   +5 more
wiley   +1 more source

Orbital Forcing and Evolution of the Southern African Monsoon From Late Miocene to Early Pliocene

Paleoceanography and Paleoclimatology, Volume 38, Issue 9, September 2023., 2023
Abstract The late Miocene‐early Pliocene (7.4‐4.5 Ma) is a key interval in Earth's history where intense reorganization of atmospheric and ocean circulation occurred within a global cooling scenario. The Southern African monsoon (SAFM) potentially played an important role in climate systems variability during this interval.
Allana Queiroz de Azevedo, Francisco J. Jiménez‐Espejo, Francesca Bulian, Francisco J. Sierro, Deborah Tangunan, Yasuhiro Takashimizu, Ana Luiza S. Albuquerque, Kaoru Kubota, Carlota Escutia, Richard D. Norris, Sidney R. Hemming, Ian R. Hall   +11 more
wiley   +1 more source

Evolución geoquímica de las salmueras de las Lagunas de Monegros (Zaragoza, España) y análisis del equilibrio de la halita

Estudios Geologicos, 1992
El análisis estadístico de los datos geoquímicos de concentración en una serie de muestras recogidas durante un período superior a un año en la laguna de La Playa en Los Monegros (Zaragoza), ha mostrado discontinuidades representativas de la falta de ...
I. Garcés, J. M. Tena, L. Auqué, J. Mandado, M. J. Gimeno   +4 more
doaj   +1 more source

Ornamental granite durability: evaluation of damage caused by salt crystallization

Materiales de Construccion, 2008
The salt crystallization test is used to evaluate damage caused by soluble salts that penetrate stone and subsequently crystallize in its voids (pores or cracks). The present article discusses the findings for four ornamental granites (gris alba, grissal,
F. J. Alonso, P. Vázquez, R. M. Esbert, J. Ordaz   +3 more
doaj   +1 more source

Revisión crítica del ensayo de cristalización de sales

Materiales de Construccion, 1987
The salt crystallisation test is, for its simplicity and aggressivity, one of the most suitable ageing tests to evaluate the durability of rock materials.
F. J. Alonso, J. Ordaz, L. Valdeón, R. M. Esbert   +3 more
doaj   +1 more source

METABOLISMO URBANO E O NITRATO NAS ÁGUAS SUBTERRÂNEAS DA CIDADE DE URÂNIA (SP)

Revista Águas Subterrâneas, 2019
As atividades concentradas nas cidades podem modificar a geoquímica do ambiente, criando um novo metabolismo urbano, abordagem que ganha importância no contexto de cidades sustentáveis e seus recursos hídricos.
RAFAEL TERADA, RICARDO HIRATA, PAULO HENRIQUE GALVÃO, CARLOS HENRIQUE GIL MARQUES   +3 more
doaj   +1 more source

Tridimensional groundwater chemical and isotopic variations as related to the Madrid aquifer flow system

Estudios Geologicos, 1985
Durante los últimos años se ha publicado un buen número de artículos sobre la Hidrogeología de la cuenca terciaria continental de Madrid. Esos artículos incluyen estudios regionales, modelos digitales de flujo y de transferencia de solutos, estudios ...
A. Fernández Uría, J. Charles Fontes, I. Herráez, M. Ramón Llamas, P. Luisa Rubio   +4 more
doaj   +1 more source

Distribución de uranio y torio en la apófisis adamellítica de Logrosán (Cáceres, España)

Estudios Geologicos, 1986
La apófisis de Logrosán (Cáceres, España) está constituida por una adamellita y una microdamellita, ambas de dos micas. Geoquímicamente presenta un carácter marcadamente alcalino, con una tendencia silicosódica clara, y peraluminoso.
J. Guijarro Galiano, A. Moreno Gutiérrez, A. Gutiérrez Moreno, A. Gutiérrez Maroto, J. Astudillo Pastor   +4 more
doaj   +1 more source