Results 71 to 80 of about 746,560 (254)

Dimorphic enantiostyly and its function for pollination by carpenter bees in a pollen‐rewarding Caribbean bloodwort

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise Flowers that present their anthers and stigma in close proximity can achieve precise animal‐mediated pollen transfer, but risk self‐pollination. One evolutionary solution is reciprocal herkogamy. Reciprocity of anther and style positions among different plants (i.e., a genetic dimorphism) is common in distylous plants, but very rare in
Steven D. Johnson   +5 more
wiley   +1 more source

Abundancia, diversidad y categoría ecológica de los peces en estero damas y estero Palo Seco, Costa Rica

open access: yesUniciencia, 2002
Se trabajó de junio de 1986 a febrero de 1987 en una estación de muestreo en el estero Palo Seco y en dos en el estero Damas (Damas y San Bosco), Pacífico Central, Costa Rica.
Hubert Araya   +3 more
doaj  

Methane Pyrolysis Performance in Catalytic Molten Media for Hydrogen Production From the Perspective of Bubble Column Reactor Design and Configuration

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In the hydrogen production routes from natural gas (methane), methane pyrolysis offers a cleaner option than the established steam methane reforming by producing CO2‐free hydrogen. However, in fixed bed reactors over solid catalysts, this technology experiences rapid catalyst deactivation due to carbon (coke) deposition encapsulating its ...
Muhammad Irfan Fakarudin   +3 more
wiley   +1 more source

Does salinity make a difference—Kidney anatomy of Saimaa (Pusa saimensis) and Baltic ringed seals (Pusa hispida botnica)

open access: yesThe Anatomical Record, EarlyView.
Abstract As habitat salinity markedly differs between the endangered, freshwater‐dwelling Saimaa ringed seal (Pusa saimensis Nordquist, 1899) and the brackish water‐inhabiting Baltic ringed seal (Pusa hispida botnica Gmelin, 1788), we investigated whether this difference has resulted in morphological changes to their kidneys.
Heini Nihtilä, Juha Laakkonen
wiley   +1 more source

Desagregando o espiritual: a fabricação de pessoas e de complexos espírito-matéria em práticas mediúnicas afro-cubanas

open access: yesReligião e Sociedade, 2015
Resumo Na prática religiosa afro-cubana de Palo Monte, falar de espíritos ou entidades é frequentemente referenciar compósitos, conjuntos de materiais, substâncias e forças que não são nem redutíveis a noções cristãs de uma alma integrante e individual ...
Diana Espírito Santo
doaj   +1 more source

Effects of intermittent exposure to hypobaria and cold on the microarchitecture and morphofunctional profile of rat gastrocnemius muscle

open access: yesThe Anatomical Record, EarlyView.
Abstract Intermittent hypobaric hypoxia (IHH) enhances oxygen transport, muscle metabolism, and cardiovascular health; however, the combined effects of hypobaria and cold are less well understood. Exposure to these stressful environmental factors, even intermittently, can affect skeletal muscle due to its plasticity, thereby altering its metabolic and ...
Garoa Santocildes   +3 more
wiley   +1 more source

Anatomía comparada del leño de tres Simarubáceas argentinas

open access: yesLilloa, 2021
El estudio anatómico de la madera de Castela coccinea Griseb., Alvaradoa amorphoides Liebm., y Picraena palo-amargo (Speg.) Speg., permite establecer la conclusión de que tienen el tipo de estructura que les corresponde según su posición sistemática en ...
Carlos A. O'Donell
doaj  

Symplectic Geometry of Supersymmetry and Nonlinear Sigma Model

open access: yes, 1993
Recently it has been argued, that Poincar\'{e} supersymmetric field theories admit an underlying loop space hamiltonian (symplectic) structure. Here shall establish this at the level of a general $N=1$ supermultiplet.
Atiyah   +8 more
core   +1 more source

A green and optimized approach for lactic acid recovery from fermented molasses using n‐butanol for local industrial applications in Côte d’Ivoire

open access: yesBiofuels, Bioproducts and Biorefining, EarlyView.
Abstract Lactic acid is a valuable organic compound with wide applications in the pharmaceutical, food, and biodegradable plastics industries. As Côte d’Ivoire seeks to strengthen its industrial capacity and promote sustainable practices, the development of efficient and environmentally benign methods for the recovery and purification of lactic acid ...
Asengo Gerardin Mabia   +7 more
wiley   +1 more source

Natural dispersal or illegal pets? Limitations on assigning origin to road‐killed ocelots in the southwestern United States

open access: yesWildlife Society Bulletin, 2011
The ocelot (Leopardus pardalis) is a spotted felid that is critically endangered in the United States (U.S.). During spring 2010, 2 ocelots were road‐killed in the southwestern U.S.
Joseph D. Holbrook   +5 more
doaj   +1 more source

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