Results 11 to 20 of about 89 (84)
Crude extract 1H NMR diversity synthesizes the compositional diversity and structural complexity of phytochemical mixtures. Plants can develop chemical diversity through different combinations of structural and compositional biosynthetic mechanisms; thus, methods incorporating both dimensions of phytochemical diversity can provide new theoretical ...
Casey S. Philbin +4 more
wiley +1 more source
Complex and nonlinear climate‐driven changes in freshwater insect communities over 42 years
Abstract The ongoing biodiversity crisis becomes evident in the widely observed decline in abundance and diversity of species, profound changes in community structure, and shifts in species’ phenology. Insects are among the most affected groups, with documented decreases in abundance up to 76% in the last 25–30 years in some terrestrial ecosystems ...
Viktor Baranov +4 more
wiley +1 more source
La presente investigación se realizó en la Hcda. “El Quemado” ubicada en el cantón Jama, provincia de Manabí, República del Ecuador, en los meses de enero a marzo de la estación invernal del 2011.
María Llyllina Cuadrado Chang +1 more
doaj +1 more source
El kyphi, un perfume ritual, mágico y medicinal en el universo egipcio grecorromano
Muchas fuentes antiguas, literarias y epigráficas, hablan de un singular producto típicamente egipcio: el kyphi. Se trata de un compuesto «químico» muy complejo, hecho con productos naturales, que toma la forma de incienso.
Sabino Perea Yébenes
doaj +1 more source
SiO2-Al2O3-ZrO2-Ag Composite and Its Signal Enhancement Capacity on Raman Spectroscopy
A ceramic–metal composite was synthesized using sol–gel and electrospinning methods to serve as a SERS substrate. The precursors used were tetraethyl orthosilicate, aluminum nitrate, and zirconium, and polyvinylpyrrolidone was added to electrospun ...
Jesús Alberto Garibay-Alvarado +4 more
doaj +1 more source
Alternativas productivas para la industria de biodiésel en Colombia
La industria mundial del biodiésel tiene como desafío identificar materias primas alternativas y desarrollar tecnologías, que permitan disminuir costos de producción de este biocombustible, haciéndolo más competitivo frente al derivado del petróleo y ...
Emyle Lucía Britton Acevedo +2 more
doaj +1 more source
La ciudad de Tarragona y sus alrededores conviven con la actividad industrial de uno de los complejos más importantes de España y del sur de Europa.
Anna Cuadras Andreu +4 more
doaj +2 more sources
Alternativa de tratamiento para reabsorción dentaria interna
Introducción: la reabsorción dentaria interna es una patología pulpar, ocasionada por un proceso inflamatorio del complejo pulpo-dentinario, de etiología diversa.
Alianna Herrera Forcelledo +2 more
doaj
ABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Camila Timana‐Mendoza +7 more
wiley +1 more source
Abstract An important, although insufficiently answered, environmental governance research question concerns how exactly participation improves policy implementation at different scales. Numerous studies have highlighted important variables influencing the effectiveness of participatory processes.
Nadine Jenny Shirin Schröder +1 more
wiley +1 more source

