Results 131 to 140 of about 145,845 (219)

El reemplazo molecular

Momento, 1995
Se esboza en este trabajo el método del reemplazo molecular, que se ha convertido últimamente en una estrategia muy útil para la determinación de la estructura de macromoléculas biológicas, cuando se posee la estructura de una molécula homóloga a la ...
Carlos A. Rojas A.
doaj  

Nitrogen fertilization reduces the standing biomass, abundance, and size of Cenococcum sclerotia: a ubiquitous but rarely quantified ectomycorrhizal soil carbon pool

New Phytologist, Volume 249, Issue 4, Page 1709-1715, February 2026.
Summary Unlike most ectomycorrhizal (EM) fungi, Cenococcum geophilum is a prolific producer of sclerotia, which represent a large and persistent, yet rarely quantified pool of EM fungal biomass and carbon in soils. How biomass of these asexual propagules is impacted by global change factors, such as anthropogenic nitrogen (N) deposition, remains ...
Christopher W. Fernandez, Peter G. Kennedy   +1 more
wiley   +1 more source

Estructura del fragmento molecular CH2

, 1964
En el presente trabajo se aplica el "Método de Ligaduras de Valencia"a los estados singulete y triplete del radical metileno para la configuraciónsp3 del C. Se considera un problema de seis electrones, loselectrones 1s de los H y los electrones 2S, 2px, 2py, 2pz del C. Nose incluyen en el cálculo los electrones 1s del C.
openaire   +2 more sources

Estructura molecular i funció dels músculs vius

, 2001
The muscle is a fabulous organic machine able to convert, at a molecular level, chemical energy coming mainly from food into mechanical force. Many efforts have been dedicated from many fields of knowledge with the single objective of finding the answer to the golden question: How can muscle produce force and movement?This thesis answers an essential ...
openaire   +1 more source

Aphid parasitism alters induced plant responses allowing a hyperparasitoid to locate its hidden parasitoid host

New Phytologist, Volume 249, Issue 4, Page 2055-2070, February 2026.
Summary Plants typically host insect communities composed of multiple trophic levels that are intricately linked through interactions mediated by the shared food plant. Hyperparasitoids are top‐level carnivores in such systems, preying on parasitoid larvae developing inside herbivores. These hyperparasitoids can dramatically reduce the effectiveness of
Mitchel E. Bourne, Alessia Vitiello, Gabriel A. Charvalakis, Leandra Meerkerk, Berhane T. Weldegergis, Karen J. Kloth, Erik H. Poelman   +6 more
wiley   +1 more source

Potencial Analítico de los Polímeros de Impronta Molecular (MIPs) como Elementos de Reconocimiento Biomimético [PDF]

, 2011
Los polímeros de impronta molecular (MIPs) son materiales sintéticos que presentan propiedades de reconocimiento molecular específico hacia determinados compuestos.
Angulo Barrios, Carlos, Barrios, C.A., Benito-Peña, E., Carrasco, S., Descalzo, A.B., Moreno-Bondi, M.C., Navarro, F., Orellana, G., Urraca, J., Zdunek, J.   +9 more
core  

Community‐driven variations in snow algae color modulate snow albedo reduction

New Phytologist, Volume 249, Issue 4, Page 1739-1752, February 2026.
Summary Snow algae blooms visibly alter snow color and surface energy balance, yet the biological basis of this variability remains unclear. We investigated how pigment composition and community structure shape the optical properties of snow algae blooms of distinct colors – red, orange, and green – co‐occurring within the same snowfield in Glacier ...
Pablo Almela, James J. Elser, Anthony Zmuda, Thomas Niehaus, Trinity L. Hamilton   +4 more
wiley   +1 more source

ESTRUCTURA MOLECULAR Y ESPECTRO DE RPE DE [Cu(L-PROLINA)2]2.5H2O

Anales (Asociación Física Argentina), 2013
Reportamos una caracterización estructural y magnética del nuevo compuesto de [Cu(L-prolina)2]2.5H2O (C20Cu2H42N4O13). Cristaliza en el grupo espacial P21 con a=11.187(1)A, b=12.172(3)A, c=11.661(1)A, β=114.96(1)A y Z=2.
E. E. Castellano, O. E. Piro, R. Sartoris, L. Ortigoza, N. Casado, R. Calvo   +5 more
doaj  

Estructura electrónica del fragmento molecular CH2

, 1960
El estudio de los radicales libres, en su acepción más amplia, hatomado mucho impulso en los últimos años, debido a la importancia creciente que los mismos han adquirido dentro de los diversos campos dela química, como así también en ciencias relacionadas con ella.
openaire   +2 more sources

Contemporary hybridization among Arabis floodplain species creates opportunities for adaptation

New Phytologist, Volume 249, Issue 3, Page 1542-1557, February 2026.
Summary Hybridization between closely related species is increasingly recognized as a major source of biodiversity. Yet, whether it can create advantageous trait combinations while purging harmful alleles remains unknown. To address this question, we studied Arabis nemorensis and Arabis sagittata, two endangered species that currently hybridize in a ...
Neda Rahnamae, Lukas Metzger, Lea Hördemann, Kevin Korfmann, Abdul Saboor Khan, Yasar Özoglan, Craig I. Dent, Samija Amar, Raúl Y. Wijfjes, Tahir Ali, Gregor Schmitz, Benjamin Stich, Aurelien Tellier, Juliette de Meaux   +13 more
wiley   +1 more source