Results 51 to 60 of about 287,376 (294)

Roadside Abundance of Anurans within a Community Correlates with Reproductive Investment

open access: yesFrontiers in Ecology and Evolution, 2017
Roads and their associated effects (road-kill, pollution, etc.) have a largely negative impact on animals, especially amphibians, but not all species are affected to the same degree. Variation in life histories may explain some of these differences. Here,
Molly K. Grace   +2 more
doaj   +1 more source

Macrophages and pigment cells in the liver of tailless amphibians

open access: yesZoodiversity, 2020
The morphological features of pigment-containing cells and phagocytic cells were observed on the smears of the liver of the lake frogs. Based on an analysis of more than 1500 cells, it was concluded that cells that have pigment granules in the cytoplasm ...
N. M. Akulenko
doaj   +1 more source

Common pulse retrieval algorithm: a fast and universal method to retrieve ultrashort pulses

open access: yes, 2018
We present a common pulse retrieval algorithm (COPRA) that can be used for a broad category of ultrashort laser pulse measurement schemes including frequency-resolved optical gating (FROG), interferometric FROG, dispersion scan, time domain ptychography,
Eilenberger, Falk   +3 more
core   +1 more source

Learning Highly Dynamic Skills Transition for Quadruped Jumping Through Constrained Space

open access: yesAdvanced Robotics Research, EarlyView.
A quadruped robot masters dynamic jumps through constrained spaces with animal‐inspired moves and intelligent vision control. This hierarchical learning approach combines imitation of biological agility with real‐time trajectory planning. Although legged animals are capable of performing explosive motions while traversing confined spaces, replicating ...
Zeren Luo   +6 more
wiley   +1 more source

Characterization and mechanism of action of amphibian-derived wound-healing-promoting peptides

open access: yesFrontiers in Cell and Developmental Biology, 2023
Wound-healing-promoting peptides are excellent candidates for developing wound-healing agents due to their small size and low production cost. Amphibians are one of the major sources of bioactive peptides, including wound-healing-promoting peptides.
Xiakun Wang   +4 more
doaj   +1 more source

Sustainable Business Innovation to Win the Competition :A Case Study of Innovation by Wayan in Bullfrog Farming in Bali [PDF]

open access: yes, 2013
Innovation  is  the  essence  of  business  survival.  Without innovation,  there  is  no  business  that  can  survive  to compete for the future.
Anandya, Dudi   +2 more
core  

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

open access: yesAdvanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska   +2 more
wiley   +1 more source

Efeito do etanol e do peróxido de hidrogênio intragástrico sobre a mucosa gástrica de rã (Rana catesbeiana, SHAW) Effect of intragastric ethanol and hydrogen peroxide in frog gastric mucosa (Rana catesbeiana, SHAW)

open access: yesBrazilian Archives of Biology and Technology, 1998
This work investigated the frog gastric mucosa response to hydrogen peroxide and ethanol induced injury. Acid and mucus secretion were estimated "in vitro" in control animals with intragastric absolute ethanol (1ml/30min.
Hidê Virgínia Estivallet   +2 more
doaj   +1 more source

Anuran accents: Continental‐scale citizen science data reveal spatial and temporal patterns of call variability

open access: yesEcology and Evolution, 2020
Many animals rely on vocal communication for mating advertisement, territorial displays, and warning calls. Advertisement calls are species‐specific, serve as a premating isolation mechanism, and reinforce species boundaries.
Savannah J. Weaver   +2 more
doaj   +1 more source

Origami‐Inspired Structural Design for Aquatic‐Terrestrial Amphibious Robots

open access: yesAdvanced Robotics Research, EarlyView.
This work presents a lightweight amphibious origami robot actuated by a single shape memory alloy wire. A rigid foldable origami structure with displacement amplification enables efficient terrestrial crawling and aquatic swimming. The addition of fan‐shaped units allows controllable turning in both environments.
Weiqi Liu   +5 more
wiley   +1 more source

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