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Biosynthesis of Silver Nanoparticles Using Black Pepper (Piper nigrum) Seed Extract and Evaluation of Their Cytotoxicity. [PDF]
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 +17 more
europepmc +2 more sources
Beyond species means – the intraspecific contribution to global wood density variation
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 +105 more
europepmc +2 more sources
La prospección geoquímica siempre ha sido y seguirá siendo una de las herramientas más efectivas para la búsqueda de recursos minerales, que se integra con la cartografía geológica base y otras disciplinas como la teledetección y la geofísica.
Orlando Bazan Santa Cruz
doaj +1 more source
Manual static chamber is one of the most widespread methods for the quantification of greenhouse gases (GHGs) emissions from agricultural systems. But there are concerns about the reliability of measurements and a necessity to assess the static chambers ...
Fernanda Figueiredo Granja Dorilêo Leite +11 more
doaj +1 more source
En el presente trabajo se analiza el contenido de las distintas tipologías de cuarzo, definidas por Basu et al. (1975) para análisis de procedencia, en depósitos arenosos actuales, generados a partir de macizos del Sistema Central con distintas ...
A. Tortosa, M. Palomares, J. Arribas
doaj +1 more source
Las rocas metamórficas del área (cuarcitas con distintos grados de pureza, porfiroides, pelíticas, calcosilicatadas, migmatíticas y sus equivalentes cataclásticos) permiten establecer un origen sedimentario con posible y variable aporte calcoalcalino ...
J. Saavedra +3 more
doaj +1 more source
El estudio metalogénico realizado en las formaciones superiores dcl Tremadociense, pertenecientes a la rama occidental del zócalo de la Cordillera Ibérica, ha permitido clasificar, como sinsedimentarios-epigenéticos a muchos de los indicios minerales de ...
A. Gutiérrez +4 more
doaj +1 more source
Caracterización composicional de los depósitos arenosos actuales generados en el Sistema Central
Se caracteriza composicionalmente la fracción ligera arenosa de los depósitos detríticos actuales generados en zonas de cabecera de arroyos que drenan macizos del Sistema Central con distintas litologías (plutónicas, gnéisicas o pizarras-esquistos ...
A. Tortosa, M. Palomares, J. Arribas
doaj +1 more source
Application of the fluorescence light microscopy in the textural study of portland cement clinker
The application of fluorescence light microscopy in the textural study of Portland cement clinker, specially its porosity, is presented. Principles and types of the technique are commented and the suggested sample preparation method is described. The use
Ángel Rodríguez Rey +4 more
doaj +1 more source
Abstract Continental shelves have the potential to remove atmospheric carbon dioxide via the biological pump, burying it in seafloor sediments. The efficiency of marine carbon sequestration changes rapidly due to variations in biological productivity ...
Bruna B. Dias +5 more
doaj +1 more source

